IMCO RECYCLING INC
8-K/A, 1998-10-05
SECONDARY SMELTING & REFINING OF NONFERROUS METALS
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<PAGE>
 
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D. C.  20549

                                  FORM 8-K/A-1

                                 CURRENT REPORT

                        Pursuant to Section 13 or 15 (d)
                     of the Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported):  July 21, 1998
                                                           -------------

                              IMCO Recycling Inc.

- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

                                    Delaware
- --------------------------------------------------------------------------------
                 (State or other jurisdiction of incorporation)

            1-7170                                      75-2008280
- ---------------------------------            -----------------------------------
    (Commission File Number)                  (IRS Employer Identification No.)

    5215 N. O'Connor Blvd., Suite 940, Irving, Texas                  75039
- --------------------------------------------------------------------------------
(Address of principal executive offices)                            (Zip Code)

       Registrant's telephone number, including area code (972) 401-7200
<PAGE>
 
ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS

In July 1998, IMCO Recycling Inc. ("IMCO", or the "Company") acquired all of the
outstanding stock of U.S. Zinc Corporation and its subsidiary corporations
("U.S. Zinc") for a total purchase price of approximately $72,000,000. U.S. Zinc
is the surviving corporation in a merger which occurred on April 1, 1998 with
Gulfmet Holdings, Inc., then its 80% parent corporation. As such, U.S. Zinc
succeeded to and possesses all assets, property rights, privileges and other
attributes of both corporations. MetalChem, Inc. and Western Zinc Corporation
are now wholly owned subsidiaries of U.S. Zinc.

*(a)  Audited Financial Statements of Business Acquired:
 
      Financial Statements of Gulfmet Holdings, Inc., MetalChem, Inc. & Western
      Zinc Corporation
 
      .  Independent Auditors' Report
      .  Combined Balance Sheet as of December 31, 1997
      .  Combined Statement of Income for the year ended December 31, 1997
      .  Combined Statement of Stockholders' Equity for the year ended 
         December 31, 1997
      .  Combined Statement of Cash Flows for the year ended December 31, 1997
      .  Notes to Combined Financial Statements

*(b)  Unaudited Financial Statements of U.S. Zinc Corporation, MetalChem, Inc. &
      Western Zinc Corporation

      .  Combined Balance Sheet as of June 30, 1998 and December 31, 1997 
         (audited)
      .  Combined Statements of Income for the six months ended June 30, 1997 
         and June 30, 1998
      .  Combined Statements of Cash Flows for the six months ended 
         June 30, 1997 and June 30, 1998
      .  Notes to Combined Financial Statements

*(c)  Pro Forma Financial Information:

      .  Pro Forma Condensed Consolidated Statement of Earnings for the year 
         ended December 31, 1997
      .  Pro Forma Condensed Consolidated Statement of Earnings for the six 
         months ended June 30, 1998
      .  Pro Forma Condensed Consolidated Balance Sheet as of June 30, 1998
      .  Notes to Pro Forma Condensed Consolidated Financial Statements
 

<PAGE>
 
(d)   Exhibits:

      **2.1   Memorandum of Purchase and Sale Agreement by and among IMCO
              Recycling Inc., the Minette and Jerome Robinson Community Property
              Trust, The Minette and Jerome Robinson Foundation, The Minette and
              Jerome Robinson Charitable Remainder Trust, M. Russ Robinson,
              Howard Robinson and Mindy Robinson Brown, dated July 21, 1998. (In
              accordance with Item 601 of Regulation S-K, the copy of the U. S.
              Zinc Purchase Agreement filed with the Securities and Exchange
              Commission (the "Commission") does not include the schedules or
              exhibits thereto. The Company agrees to furnish such information
              supplementally to the Commission upon request.)

      **2.2   Form of Common Stock Purchase Warrant dated July 21, 1998.

      * 2.3   Amendment No. 1 to Memorandum of Purchase and Sale Agreement by
              and among IMCO Recycling Inc., the Minette and Jerome Robinson
              Community Property Trust, The Minette and Jerome Robinson
              Foundation, The Minette and Jerome Robinson Charitable Remainder
              Trust, M. Russ Robinson, Howard Robinson and Mindy Robinson Brown,
              effective as of August 20, 1998.

      *23.1   Consent of Deloitte & Touche LLP

- --------------------------------------------------------------------------------
*   Filed herewith

**  Previously Filed in this Current Report on Form 8-K
<PAGE>
 
                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                       IMCO Recycling Inc.
                                       ("Registrant")

                                       By: /s/    Robert R. Holian
                                          ------------------------------------
                                             Robert R. Holian
                                             Vice President and Controller
                                             Principal Accounting Officer

Date:  October 5, 1998

<PAGE>
 
 
      Gulfmet Holdings, Inc., MetalChem, Inc. & Western Zinc Corporation

                              Financial Statements

                          Year ended December 31, 1997

                                    CONTENTS
 
Independent Auditors' Report....................................... F-2
Financial Statements:
Combined Balance Sheet............................................. F-3 - F-4
Combined Statement of Income....................................... F-5
Combined Statement of Stockholders' Equity......................... F-6
Combined Statement of  Cash Flows.................................. F-7 - F-8
Notes to Combined Financial Statements............................. F-9 - F-16
 



                                      F-1

<PAGE>
 
INDEPENDENT AUDITORS' REPORT


To the Board of Directors of
    Gulfmet Holdings, Inc., MetalChem, Inc. & Western Zinc Corporation
Houston, Texas

We have audited the accompanying combined balance sheet of Gulfmet Holdings,
Inc. and related companies as of December 31, 1997, and the related combined
statements of income, stockholders' equity and cash flows for the year then
ended. The combined financial statements include the accounts of Gulfmet
Holdings, Inc. and two related companies, MetalChem, Inc. and Western Zinc
Corporation. These companies are under common ownership and common management.
These financial statements are the responsibility of the companies' management.
Our responsibility is to express an opinion on these financial statements based
on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

In our opinion, such financial statements present fairly, in all material
respects, the combined financial position of Gulfmet Holdings, Inc. and related
companies as of December 31, 1997, and the combined results of their operations
and their combined cash flows for the year then ended in conformity with
generally accepted accounting principles.


/s/ DELOITTE & TOUCHE LLP

August 17, 1998


                                      F-2
<PAGE>
 
GULFMET HOLDINGS, INC., METALCHEM, INC. &
WESTERN ZINC CORPORATION

COMBINED BALANCE SHEET,
DECEMBER 31, 1997 (In thousands)
- ------------------------------------------------------------------------------


ASSETS

CURRENT ASSETS:
   Cash and cash equivalents                         $  1,188
   Accounts receivable:
      Trade                                            27,520
      Shareholders                                        248
      Other                                               126
   Inventories                                         15,254
   Prepaid expenses                                     1,225
   Income taxes receivable                                212
   Deferred tax asset                                     363
                                                     --------

                Total current assets                   46,136
                                                     --------

PROPERTY, PLANT AND EQUIPMENT:
   Land                                                   746
   Buildings and improvements                           3,964
   Machinery and equipment                             23,046
                                                     --------

                Total                                  27,756

   Less accumulated depreciation                      (14,790)
                                                     --------

                Property, plant and equipment, net     12,966
                                                     --------

EQUIPMENT HELD FOR SALE                                    66

OTHER ASSETS, NET                                         748
                                                     --------

TOTAL                                                $ 59,916
                                                     ========

                                      F-3
<PAGE>
 
- --------------------------------------------------------------------------------

LIABILITIES AND STOCKHOLDERS' EQUITY

<TABLE>
<S>                                                                          <C>    
CURRENT LIABILITIES:
   Accounts payable and accrued expenses                                     $16,352
   Payable to affiliate                                                            8
   Accrued disposal expense                                                      775
   Current portion of long-term debt                                           1,226
                                                                             -------

                Total current liabilities                                     18,361

LONG-TERM DEBT                                                                24,634

DEFERRED INCOME TAXES PAYABLE                                                  1,421
                                                                             -------

                Total liabilities                                             44,416
                                                                             -------

COMMITMENTS AND CONTINGENCIES

STOCKHOLDERS' EQUITY:
   Common stock - $1 par value; 21,000 shares authorized and 18,428 shares
      issued and outstanding, as follows:
      Gulmet Holdings, Inc. (428 shares issued and outstanding)
      MetalChem, Inc. (10,000 shares issued and outstanding)                      10
      Western Zinc Corporation (8,000 shares issued and outstanding)               8
   Additional paid-in capital                                                  2,198
   Retained earnings                                                          13,284
                                                                             -------

                Total stockholders' equity                                    15,500
                                                                             -------

TOTAL                                                                        $59,916
                                                                             =======
</TABLE>

                                      F-4
<PAGE>
 
GULFMET HOLDINGS, INC., METALCHEM, INC. &
WESTERN ZINC CORPORATION

COMBINED STATEMENT OF INCOME
FOR THE YEAR ENDED DECEMBER 31, 1997 (IN THOUSANDS)
- ------------------------------------------------------------------------------


SALES                                               $ 164,515

COST OF SALES                                         151,918
                                                    ---------

GROSS MARGIN                                           12,597

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES            6,781
                                                    ---------

INCOME FROM OPERATIONS                                  5,816
                                                    ---------

OTHER (INCOME) EXPENSE:
   Interest expense                                     2,050
   Interest income                                        (44)
   Equity in loss of Gulf Metals Industries, Inc.         390
   Loss on sale of Gulf Metals Industries, Inc.           544
   Other, net                                            (134)
                                                    ---------

                Total                                   2,806
                                                    ---------

INCOME BEFORE INCOME TAXES                              3,010
                                                    ---------

PROVISION FOR INCOME TAXES:
   Current                                                378
   Deferred                                                (4)
                                                    ---------

                Total                                     374
                                                    ---------

NET INCOME                                          $   2,636
                                                    =========


See notes to combined financial statements.

                                      F-5
<PAGE>
 
GULFMET HOLDINGS, INC., METALCHEM, INC. &
WESTERN ZINC CORPORATION

COMBINED STATEMENT OF STOCKHOLDERS' EQUITY
FOR THE YEAR ENDED DECEMBER 31, 1997
(In thousands of dollars, except share amounts)
- ------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                           
                                          COMMON STOCK     ADDITIONAL              TOTAL     
                                       -----------------    PAID-IN   RETAINED STOCKHOLDERS'
                                       SHARES    AMOUNT     CAPITAL   EARNINGS    EQUITY
<S>                                    <C>       <C>        <C>       <C>         <C>     
BALANCE AT
   JANUARY 1, 1997                     18,428    $    18    $   408   $12,308     $12,734 
                                                                                          
   Net income                                                           2,636       2,636 
                                                                                          
   Distributions to shareholders                                       (1,660)     (1,660)
                                                                                          
   Contribution of shareholder note                           1,790                 1,790 
                                       ------    -------    -------   -------     ------- 
                                                                                          
BALANCE AT                                                                                
   DECEMBER 31, 1997                   18,428    $    18    $ 2,198   $13,284     $15,500 
                                       ======    =======    =======   =======     ======= 
</TABLE>
                                

See notes to combined financial statements.

                                      F-6
<PAGE>
 
GULFMET HOLDINGS, INC., METALCHEM, INC. &
WESTERN ZINC CORPORATION

COMBINED STATEMENT OF CASH FLOWS
FOR THE YEAR ENDED DECEMBER 31, 1997 (In thousands)
- -------------------------------------------------------------------------------

<TABLE>

CASH FLOWS FROM OPERATING ACTIVITIES:
<S>                                                                                <C>    
   Net income                                                                      $ 2,636
   Adjustments to reconcile net income to net cash used in operating activities:
      Depreciation and amortization                                                  2,294
      Gain on disposition of property, plant and equipment                             (24)
      Equity in loss of Gulf Metals Industries, Inc.                                   390
      Loss on sale of Gulf Metals Industries, Inc.                                     544
      Loss on sale of assets held for sale                                              53
      Deferred income tax provision                                                     (4)
      Change in assets and liabilities:
         Decrease (increase) in:
            Accounts receivable:
               Trade                                                                (6,214)
               Affiliates                                                            3,055
               Other                                                                   761
            Inventories                                                             (3,994)
            Prepaid expenses                                                          (141)
            Other assets                                                              (305)
            Income taxes receivable                                                    129
         Increase in accounts payable and accrued expenses                             797
                                                                                   -------

                Net cash used in operating activities                                  (23)
                                                                                   -------

CASH FLOWS FROM INVESTING ACTIVITIES:
   Purchases of property, plant and equipment                                       (1,128)
   Proceeds from sale of property, plant and equipment                                 531
   Proceeds from sale of Gulf Metals Industries, Inc.                                   25
                                                                                   -------

                Net cash used in investing activities                                 (572)
                                                                                   -------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Net borrowings under revolving line of credit                                     5,179
   Payments on senior debt                                                          (1,485)
   Payments on subordinated shareholder debt                                           (23)
   Net advances to affiliate                                                        (1,022)
   Distributions to shareholders                                                    (1,660)
                                                                                   -------

                Net cash provided by financing activities                              989
                                                                                   -------

NET INCREASE IN CASH AND CASH EQUIVALENTS                                              394

CASH AND CASH EQUIVALENTS - BEGINNING OF YEAR                                          794

CASH AND CASH EQUIVALENTS - END OF YEAR                                            $ 1,188
                                                                                   =======
</TABLE>


                                                                     (Continued)

                                      F-7
<PAGE>
 
GULFMET HOLDINGS, INC., METALCHEM, INC. &
WESTERN ZINC CORPORATION

COMBINED STATEMENT OF CASH FLOWS
FOR THE YEAR ENDED DECEMBER 31, 1997 (In thousands)
- -------------------------------------------------------------------------------


SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION - Cash paid for:
   Interest                                                         $2,041
                                                                    ======

   Taxes (net of refunds)                                           $  525
                                                                    ======

SUPPLEMENTAL DISCLOSURE OF NONCASH TRANSACTIONS:
   Contribution of shareholder note into equity                     $1,790
                                                                    ======

   Property acquired by capital leases                              $  190
                                                                    ======


See notes to combined financial statements.                         (Concluded)

                                      F-8
<PAGE>
 
GULFMET HOLDINGS, INC., METALCHEM, INC. &
WESTERN ZINC CORPORATION


NOTES TO COMBINED FINANCIAL STATEMENTS
FOR THE YEAR ENDED DECEMBER 31, 1997
- --------------------------------------------------------------------------------


1.    BASIS OF PRESENTATION AND SUMMARY OF ACCOUNTING POLICIES

      ORGANIZATION - Gulfmet Holdings, Inc. ("Gulfmet") is a privately held
      Delaware Corporation. MetalChem, Inc. ("MetalChem") and Western Zinc
      Corporation ("Western") are separate, individually owned subchapter S
      corporations.

      On December 31, 1997 the stock of Gulf Metals Industries, Inc., a wholly
      owned subsidiary of Gulfmet, was sold to G.M.I. Investments, L.L.C., an
      affiliate of a shareholder of Gulfmet, for $25,000. A loss of $544,000 has
      been recorded on the sale.

      DESCRIPTION OF BUSINESS - Gulfmet is headquartered in Houston, Texas, and
      its business primarily consists of manufacturing value-added zinc
      products. These zinc products, consisting primarily of zinc dust, zinc
      oxide, zinc ingot and various zinc by-products, are manufactured at five
      locations in the United States, with sales offices in the United States,
      Canada and Germany. Gulfmet's major customers include tire and rubber
      manufacturers, steel galvanizers, and paint and chemical manufacturers.

      MetalChem and Western are located in Pittsburgh, Pennsylvania and Los
      Angeles, California, respectively. MetalChem also has satellite offices in
      Germany, and Canada. Operations of the companies consist primarily of
      buying and reselling secondary zinc-bearing materials.

      PRINCIPLES OF COMBINATION - The combined financial statements include the
      accounts and operations of Gulfmet, its majority-owned subsidiary, U.S.
      Zinc Corporation ("USZ"), MetalChem and Western (the "Company"). Gulfmet
      owns 80% of USZ. The remaining 20% is owned by the shareholders of Gulfmet
      and is included in these combined financial statements. Both MetalChem and
      Western are 100% owned by the shareholders of Gulfmet. Western is under
      common management with Gulfmet, while MetalChem is managed by separate
      personnel. All material intercompany accounts and transactions have been
      eliminated in combination. 

      These combined financial statements are presented on the accrual basis of
      accounting in accordance with generally accepted accounting principles.
      Significant principles followed by the Company and the methods of applying
      those principles that materially affect the combined financial statements
      are summarized below:

      CASH AND CASH EQUIVALENTS - The Company considers all short-term
      investments with a maturity of three months or less at acquisition to be
      cash equivalents.

      SALES RECOGNITION - Sales and accounts receivable are recorded at the date
      of product shipment.

                                      F-9
<PAGE>
 
      INVENTORIES - Inventories consist of finished goods, raw materials and by-
      products. For Gulfmet, finished goods and by-products are recorded at
      market less estimated selling costs. Raw materials are recorded at the
      lower of cost or market. Cost for inventories held by Gulfmet is
      determined using the last-in first-out ("LIFO") method of accounting in
      order to match the most current costs of production with the related
      revenues. Cost for inventories representing 2% of total combined inventory
      held by MetalChem and Western is determined using average costing.

      PROPERTY, PLANT AND EQUIPMENT - Property, plant and equipment are
      presented at cost. Depreciation is computed using the straight-line method
      over the estimated useful lives of the assets, as follows:

              Buildings and improvements          5 - 20 years
              Machinery and equipment             3 - 10 years

      Depreciation expense for the year ended December 31, 1997 was $2,001,000.
      The Company evaluates long-lived assets for impairment based on the
      recoverability of the asset's carrying value. When it is probable that the
      undiscounted future cash flows will not be sufficient to recover the
      asset's carrying value, an impairment is recognized. No such impairments
      were recognized by the Company during the year ended December 31, 1997.

      OTHER ASSETS - Other assets consist primarily of goodwill, financing,
      organization, and non-compete costs. Such assets are being amortized over
      a period of five to fifteen years. See Note 4.

      INCOME TAXES - Gulfmet files a consolidated federal income tax return.
      Gulfmet and its subsidiary file separate state tax returns and a unitary
      return in Illinois, with the related expense included in the provision for
      income taxes.

      Gulfmet uses the liability method to account for its deferred income
      taxes. Deferred income taxes are provided for the differences between the
      tax basis of assets and liabilities and their basis for financial
      statement purposes.

      MetalChem and Western are both organized as subchapter S corporations.
      Accordingly, the attached combined financial statements do not reflect any
      provision for federal income taxes for these entities, as such amounts are
      the responsibility of their respective shareholders.

      FAIR VALUES OF FINANCIAL INSTRUMENTS - The carrying values reflected in
      the combined balance sheet of the Company for cash, accounts receivable
      and accounts payable approximated their fair values because of the short-
      term nature of such financial instruments. The carrying amount of the
      Company's long-term, fixed rate debt was estimated to approximate its fair
      value at December 31, 1997 based on currently prevailing interest rates
      for similar issues.

      SIGNIFICANT GROUP OF CONCENTRATIONS OF CREDIT RISK - The Company's trade
      accounts receivable potentially subject them to concentrations of credit
      risk. Sales of zinc dust are primarily made across a wide geographic base
      to a large number of customers; however, 35% of zinc dust sales are made
      in the Gulf Coast region. Sales of zinc oxide to a large number of
      customers are concentrated 36% in the Midwest region and 26% in the Gulf
      Coast region. Sales of zinc metal to a large number of customers are
      concentrated in the Gulf Coast region. For the year ended December 31,
      1997, there were no sales to any individual customer which exceeded 10% of
      total sales.

                                     F-10
<PAGE>
 
      NEW ACCOUNTING PRONOUNCEMENTS - SFAS No. 129, "Disclosure of Information
      About Capital Structure," was issued in February 1997 and establishes
      standards for disclosing information about an entity's capital structure.
      This statement is effective for fiscal years beginning after December 15,
      1997.

      SFAS No. 130, "Reporting Comprehensive Income," was issued in June 1997
      and requires disclosure of all nonstockholder changes in equity during a
      period. This statement is effective for fiscal years beginning after
      December 15, 1997.

      SFAS No. 133, "Accounting for Derivative Instruments and Hedging
      Activities" was issued in June 1998 and establishes certain reporting and
      accounting requirements for entities which hold such instruments or engage
      in such activities. This statement is effective for all fiscal quarters of
      fiscal years beginning after June 15, 1999.

      Statement of Position 98-5 was issued in April 1998 and is effective for
      fiscal years beginning after December 15, 1998. This statement requires
      that organization and start-up costs for a Company be expensed as
      incurred.

      The Company's management expects that adoption of these statements other
      than SFAS 133, if required, will not have a material effect on the
      Company's combined financial position or results of operations but will
      impact future financial statement disclosure. Management has not completed
      their evaluation of SFAS 133 and accordingly, its impact on the Company's
      combined financial position or results of operations can not be determined
      at this time.

      USE OF ESTIMATES - The preparation of financial statements in accordance
      with generally accepted accounting principles requires management to make
      use of estimates and assumptions that affect amounts reported in the
      financial statements as well as certain disclosures. Actual results could
      differ from these estimates.

2.    SUBSEQUENT EVENTS

      On April 1, 1998 (the "Effective Date"), the shareholders of Gulfmet
      approved the Agreement of Merger under which Gulfmet merged with USZ.
      Gulfmet's stock shall convert into fully paid and nonassessable shares of
      USZ stock. Each share of the common stock of Gulfmet outstanding as of the
      Effective Date, and all rights in respect thereof, shall be changed and
      converted into 3.7383 shares of common stock of USZ. USZ, as surviving
      corporation, will succeed to and possess all assets, property, rights,
      privileges, powers, franchises and other attributes of both corporations.
      Corporate actions approved by the Company's officers, directors and/or
      stockholders before the Effective Date will remain in effect, and USZ will
      be bound by them.

      On April 22, 1998, IMCO Recycling Inc. ("IMCO"), a public company, signed
      a letter of intent to acquire USZ. On July 21, 1998, a definitive
      agreement was signed, with an effective date of July 1, 1998. The
      principal terms of the acquisition are expected to be completed in the
      third quarter of 1998, subject to regulatory approval. The purchase price
      is expected to total approximately $72 million to be paid through cash,
      the assumption of debt and the issuance of new IMCO common shares in a
      privately negotiated transaction. In addition, the transaction provides
      for additional payments depending on future earnings performance and
      issuance of four-year warrants to purchase 1.5 million shares of IMCO
      common stock.

                                     F-11
<PAGE>
 
      On July 1, 1998, the shareholders of MetalChem and Western contributed
      their shares to USZ, for no consideration, making both companies wholly
      owned subsidiaries of USZ, to be included in the sale to IMCO.

      During July 1998, IMCO repaid the full amount outstanding under the
      Company's line of credit (see Note 5).

3.    INVENTORIES

      Inventories consisted of the following:

                                                     (000'S)

              Finished goods                        $  4,347
              Raw materials                            8,783
              By-products                              2,124
                                                    --------

              Total                                 $ 15,254
                                                    ========

      At December 31, 1997, the LIFO reserve was $2,001,000. Cost of sales for
      the year ended December 31, 1997, would have decreased by $1,437,000 if
      the first-in first-out cost method had been used.

4.    OTHER ASSETS

      Other assets consisted of the following:

                                                     (000's)

              Goodwill                              $    245
              Organization costs and noncompete     
                agreements                               162
              Financing costs                             83
              Deposits and bonds                         166
              Other                                      339
                                                    --------
              
              Total                                      995

              Less accumulated amortization              247

              Total                                 $    748
                                                    ========

                                     F-12
<PAGE>
 
5.    NOTES PAYABLE, LONG-TERM DEBT AND FINANCING ARRANGEMENTS

      Long-term debt consisted of the following:

                                                              (000's)

              Term note payable to a bank, due in 
               monthly installments of approximately
               $75,000, plus interest at a variable 
               rate, maturing August 2002                    $  4,108
              Note payable to a third party, due in 
               equal monthly installments of 
               approximately $25,000, including 
               interest imputed at 6%, maturing 
               February 1999                                      319
              Revolving line of credit with a bank, 
               plus interest at a floating rate, 
               maturing June 1999                              21,274
              Obligation under capital leases                     159
                                                             --------

              Total                                            25,860

              Less current maturities                           1,226
                                                             --------
              Total long-term debt                           $ 24,634
                                                             ========

      Gulfmet has a term loan with a bank. During 1995, Gulfmet renegotiated its
      term agreement with a new loan of $6,500,000 due in monthly installments
      of approximately $75,000 plus interest at London Interbank Offered Rates
      ("LIBOR"), plus 2.50% (8.4922% at December 31, 1997), and is
      collateralized by substantially all of its capital assets. The terms of
      the commitment require, among other things, Gulfmet to meet certain
      financial ratios, maintain a minimum tangible net worth and limit dividend
      payments and investments in, and advances to, subsidiaries and affiliates.
      At December 31, 1997, USZ was not in compliance with the reporting
      covenant requiring audited consolidated financial statements of USZ to be
      delivered to the bank within 120 days after the end of the fiscal year; it
      has obtained a waiver of such noncompliance from the bank.

      Gulfmet satisfies its short-term debt requirements through a revolving
      line of credit agreement with a bank. During 1997, Gulfmet renegotiated
      its revolving line of credit facility with terms and covenants similar to
      its previous credit line. The loan agreement provides for a revolving line
      of credit aggregating $25,000,000, subject to a combined borrowing base
      limitation of eligible accounts receivable and inventory. The credit line
      bears interest at LIBOR plus a variable rate, ranging from 1.75% to 2.75%,
      dependent on Gulfmet's funded debt ratio; such rate was 8.00% at December
      31, 1997 and is collateralized by accounts receivable and inventory.
      Amounts available under the credit agreement totaled $3,726,000 at
      December 31, 1997. The terms of the agreement require, among other things,
      Gulfmet to meet certain financial ratios, maintain minimum tangible net
      worth and limit dividend payments and investments in, and advances to,
      subsidiaries and affiliates. At December 31, 1997, USZ was not in
      compliance with the reporting covenant requiring audited consolidated
      financial statements of USZ to be delivered to the bank within 120 days
      after the end of the fiscal year; it has obtained a waiver of such
      noncompliance from the bank.

      The subordinated convertible promissory notes from shareholders had an
      outstanding balance of $1,813,000 at January 1, 1997. The shareholders
      agreed to contribute the remaining principal balance, $1,790,000, into
      paid-in capital at December 31, 1997.

                                     F-13
<PAGE>
 
      During 1997, Gulfmet entered into capital leases with an unrelated party
      for forklifts. Each lease meets the criteria of a capital lease as defined
      by SFAS No. 13, "Accounting for Leases," which defines a capital lease
      generally as one which transfers benefits and risks of ownership to the
      lessee. The assets have been capitalized as machinery and equipment in an
      amount equal to the present value of the future minimum lease payments at
      the inception of the lease and are being depreciated over the life of the
      respective lease. A corresponding liability was recorded as long-term
      debt. Principal and interest payments during 1997 totaled $31,000 and
      $4,000, respectively. At December 31, 1997, assets capitalized under
      capital leases amounted to $190,000 less accumulated depreciation of
      $21,000. Depreciation expense of $21,000 has been recorded and included in
      depreciation and amortization. At December 31, 1997, the current and long-
      term portions of the future minimum lease obligations were $59,000 and
      $100,000, respectively.


      Maturities of long-term debt for each of the five years subsequent to
      December 31, 1997 are as follows:

                                                       (000's)

              1998                                    $  1,226
              1999                                      22,286
              2000                                         936
              2001                                         899
              2002                                         513
                                                      --------
              
              Total                                   $ 25,860
                                                      ========

      On July 21, 1998, IMCO paid off the outstanding balance of $15,725,000
      under the Company's revolving line of credit. In addition, IMCO also paid
      $201,865 for various fees and expenses, such as interest, commitment fees,
      letters of credit and escrow fees.

6.    INCOME TAXES

      Differences between the effective tax rate and the statutory federal rate
      are as follows:

                                                             (000'S)

              Federal income tax provision 
               at the statutory rate of 34%                 $ 1,023
              Increase (decrease) resulting from:
                 State income taxes, net of 
                  federal income tax benefit                    101
                 Subchapter S earnings                         (536)
                 Nondeductible meals and    
                  entertainment                                  26
                 Nondeductible officers' life 
                  insurance                                      25
                 Accrual to return adjustment                  (337)
                 Foreign sales corporation 
                  benefits                                     (228)
                 Loss on sale of Gulf Metals 
                  Industries, Inc.                              265
                 Other, net                                      35
                                                            -------
              
              Total                                         $   374
                                                            =======

                                     F-14
<PAGE>
 
      Temporary differences which gave rise to deferred tax assets and
      liabilities at December 31, 1997 were as follows:

                                                              (000'S)

              Deferred tax liabilities:
                 Depreciation of property, 
                  plant and equipment                        $ 1,188
                 Interest charge - domestic 
                  international sales corporation                213
                 Other                                            20
                                                             -------
              
              Deferred tax liability                           1,421
                                                             -------
              
              Current deferred tax assets:
                 Accrued workers' compensation                    45
                 Accrued disposal expense                        279
                 Other                                            39
                                                             -------
              
              Current deferred tax asset                     $   363
                                                             =======
              


7.    RELATED-PARTY TRANSACTIONS

      Interest expense to affiliated parties and shareholders was approximately
      $229,000 and interest income from affiliated parties was approximately
      $33,000 during 1997.

      As discussed in Note 1, the stock of Gulf Metals Industries, Inc., a
      wholly owned subsidiary of the Gulfmet, was sold to GMI Investments,
      L.L.C., an affiliate of a shareholder of the Company, for $25,000. A loss
      of $544,000 has been recorded on the sale.

8.    CONTINGENCIES AND COMMITMENTS

      The Company is involved in various litigation matters arising in the
      normal course of its business. Management believes it has adequate legal
      defenses or insurance coverage and that the ultimate outcome of such
      litigation will not have a materially adverse effect on the Company's
      financial position or results of operations.

      Gulfmet's operations are subject to environmental laws and regulations,
      and Gulfmet is involved in ongoing proceedings and communications with
      regulatory authorities concerning environmental matters. It is possible
      that as a result of these proceedings and communications, Gulfmet may in
      the future incur additional costs to assure compliance with environmental
      laws and regulations. In the opinion of management, the disposition of
      these claims will not have a materially adverse effect on the Company s
      financial position or results of operations.

      Gulfmet has accrued $775,000 of disposal expense related to zero value
      inventory, of which the majority was disbursed during the first quarter of
      1998.

                                     F-15
<PAGE>
 
      The Company has various noncancelable operating lease commitments
      outstanding at December 31, 1997, payable as follows:

                    FISCAL YEAR
                              
                       1998                    $ 236,000             
                       1999                      109,000             
                       2000                       37,000             
                       2001                       25,000             
                       2002                       25,000             
                    Thereafter                    27,000             
                                               ---------
                                                                     
                       Total                   $ 459,000             
                                               =========             

      Rental expense under these leases for 1997 was $294,000.

9.    SAVINGS AND PROFIT SHARING PLAN

      The Company has a savings plan which covers all employees not covered by a
      collective bargaining agreement. Participants may contribute up to 15% of
      his or her annual compensation. Employer contributions are discretionary
      and are determined by the Board of Directors. The Company recorded
      contributions related to this plan of $108,000 for the year ended 1997.

                                    ******

                                     F-16
<PAGE>
 
U.S. ZINC CORPORATION, METALCHEM, INC. &
WESTERN ZINC CORPORATION

COMBINED BALANCE SHEETS,
(IN THOUSANDS)
- -------------------------------------------------------------------------
<TABLE>                                          
<CAPTION>                                        
                                                       JUNE 30, DECEMBER 31, 
                                                         1998      1997
                                                     (unaudited) (audited)
                                                     ---------- ------------
ASSETS
<S>                                                    <C>     <C>  
CURRENT ASSETS:                                  
   Cash and cash equivalents                            $ 1,316   $ 1,188
   Accounts receivable:                          
      Trade, net                                         22,634    27,520
      Affiliates                                            978       248 
      Other                                                 483       126 
   Inventories                                            9,646    15,254
   Prepaid expenses                                       1,247     1,225
   Income tax receivable                                     83       212
   Deferred tax asset                                         -       363
                                                        -------   -------     
                                                  
                Total current assets                     36,387    46,136
                                                 
PROPERTY, PLANT AND EQUIPMENT:                   
   Land                                                     441       746
   Buildings and improvements                             3,704     3,964  
   Machinery and equipment                               24,003    23,046
                                                        -------   -------  
                                                 
                Total                                    28,148    27,756
                                                 
   Less accumulated depreciation                        (15,813)  (14,790)
                                                        -------   -------     
                                                 
                Property, plant and equipment, net       12,335    12,966
                                                        -------   ------- 
                                                 
EQUIPMENT HELD FOR SALE                                      66        66
                                                 
OTHER ASSETS, NET                                           720       748  
                                                        -------   -------
 
TOTAL                                                  $ 49,508   $59,916
                                                       ========   ======= 
</TABLE>


See notes to combined financial statements.


                                F-17
<PAGE>
 
- ------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                            JUNE 30,  DECEMBER 31, 
                                                                              1998       1998
                                                                           (unaudited) (audited)
                                                                           ---------- ------------
<S>                                                                        <C>          <C> 
LIABILITIES AND STOCKHOLDERS' EQUITY                                              

CURRENT LIABILITIES:                      
   Accounts payable:
      Trade and accrued expenses                                              $ 12,820     $ 16,352
      Other                                                                        380          783
   Current portion of long-term debt                                             1,094        1,226
                                                                              --------     --------

                Total current liabilities                                       14,294       18,361

LONG-TERM DEBT                                                                  17,509       24,634

DEFERRED INCOME TAXES PAYABLE                                                    1,307        1,421
                                                                              --------     --------

                Total liabilities                                               33,110       44,416
                                                                              --------     -------- 
STOCKHOLDERS' EQUITY:
   Common stock - $1 par value; 21,000 shares authorized and 20,000 shares
      issued and outstanding, as follows:
      Gulfmet Holdings, Inc. (428 shares issued and outstanding)                     -            -
      U.S. Zinc Corporation (2,000 shares issued and outstanding)                    2            -
      MetalChem, Inc. (10,000 shares issued and outstanding)                        10           10
      Western Zinc Corporation (8,000 shares issued and outstanding)                 8            8
   Additional paid-in capital                                                    2,198        2,198
   Retained earnings                                                            14,180       13,284
                                                                              --------     --------

                Total stockholders' equity                                      16,398       15,500
                                                                              --------     --------



TOTAL                                                                         $ 49,508     $ 59,916
                                                                              ========     ========
</TABLE> 
                                     F-18



<PAGE>
 
U.S. ZINC CORPORATION, METALCHEM, INC. &
WESTERN ZINC CORPORATION

COMBINED STATEMENTS OF INCOME (UNAUDITED)
(IN THOUSANDS)
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                       FOR THE SIX MONTHS ENDED
                                                   ------------------------------
                                                   JUNE 30, 1998    JUNE 30, 1997
                                                   -------------    -------------
<S>                                                <C>              <C>          
SALES                                              $      82,047    $      72,597

COST OF SALES                                             76,521           67,385
                                                   -------------    -------------

GROSS MARGIN                                               5,526            5,212

SELLING, GENERAL AND ADMINISTRATIVE EXPENSES               2,718            2,471
                                                   -------------    -------------

INCOME FROM OPERATIONS                                     2,808            2,741
                                                   -------------    -------------

OTHER (INCOME) EXPENSE:
   Interest expense                                          844            1,026
   Interest income                                           (20)             (25)
   Equity in loss of Gulf Metals Industries Inc.              --              195
   Other, net                                                127             (173)
                                                   -------------    -------------

                Total                                        951            1,023
                                                   -------------    -------------

INCOME BEFORE PROVISION FOR INCOME TAXES                   1,857            1,718
                                                   -------------    -------------

PROVISION FOR INCOME TAXES:
   Current                                                   289              266
   Deferred                                                  249               --
                                                   -------------    -------------

                Total                                        538              266
                                                   -------------    -------------

NET INCOME                                         $       1,319    $       1,452
                                                   =============    =============
</TABLE>


See notes to combined financial statements.

                                     F-19

<PAGE>
 
U.S. ZINC CORPORATION, METALCHEM, INC. &
WESTERN ZINC CORPORATION

COMBINED STATEMENTS OF CASH FLOWS (UNAUDITED)
(IN THOUSANDS)
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                          FOR THE SIX MONTHS ENDED
                                                                                       ------------------------------
                                                                                       JUNE 30, 1998    JUNE 30, 1997
                                                                                       -------------    -------------
<S>                                                                                    <C>              <C>          
CASH FLOWS FROM OPERATING ACTIVITIES:
   Net income                                                                          $       1,319    $       1,452
   Adjustments to reconcile net income to net cash provided by operating activities:
      Depreciation and amortization                                                            1,186            1,077
      Gain on disposition of property, plant and equipment                                       (11)             (12)
      Deferred income tax provision                                                              249               --
      Equity in loss of Gulf Metals Industries Inc.                                               --              195
      Change in assets and liabilities:
         Decrease (increase) in:
            Accounts receivable:
               Trade                                                                           4,887           (4,462)
               Affiliates                                                                       (655)           1,629
               Other                                                                              23              557
            Inventories                                                                        5,609            1,543
            Prepaid expenses                                                                     (21)            (341)
            Other assets                                                                          (3)             240
            Income taxes receivable                                                              129              135
         Decrease in accounts payable and accrued expenses                                    (4,322)          (3,277)
                                                                                       -------------    -------------

                Net cash provided (used) by operating activities                               8,390           (1,264)
                                                                                       -------------    -------------

CASH FLOWS FROM INVESTING ACTIVITIES:
   Purchases of property, plant and equipment                                                 (1,004)            (440)
   Proceeds from sale of property, plant and equipment                                           491               37
                                                                                       -------------    -------------
                Net cash used in investing activities                                           (513)            (403)
                                                                                       -------------    -------------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Net payments under revolving line of credit                                                (6,619)           2,930
   Payments on senior and subordinate debt                                                      (667)            (839)
   Net advances to affiliate                                                                     (68)            (294)
   Distributions to shareholders                                                                (395)            (685)
                                                                                       -------------    -------------

                Net cash (used in) provided by financing activities                           (7,749)           1,112
                                                                                       -------------    -------------

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                             128             (555)

CASH AND CASH EQUIVALENTS - BEGINNING OF PERIOD                                                1,188              794
                                                                                       -------------    -------------

CASH AND CASH EQUIVALENTS - END OF PERIOD                                              $       1,316    $         239
                                                                                       =============    =============
</TABLE>


                                                                    (Continued)

                                     F-20
<PAGE>
 
U.S. ZINC CORPORATION, METALCHEM, INC. &
WESTERN ZINC CORPORATION

NOTES TO COMBINED FINANCIAL STATEMENTS
FOR THE SIX MONTHS ENDED JUNE 30, 1998
- --------------------------------------------------------------------------------

1. BASIS OF PRESENTATION AND SUMMARY OF ACCOUNTING POLICIES

   ORGANIZATION - Gulfmet Holdings, Inc. ("Gulfmet") is a privately held
   Delaware Corporation. MetalChem, Inc. ("MetalChem") and Western Zinc
   Corporation ("Western") are separate, individually owned subchapter S
   corporations.

   On April 1, 1998 (the "Effective Date"), the shareholders of Gulfmet approved
   the Agreement of Merger under which the Gulfmet merged with USZ.  Gulfmet's
   stock was converted into fully paid and nonassessable shares of USZ stock.
   Each share of the common stock of Gulfmet outstanding as of the Effective
   Date, and all rights in respect thereof, were changed and converted into
   3.7383 shares of common stock of USZ.  USZ, as surviving corporation, will
   succeed to and possess all assets, property, rights, privileges, powers,
   franchises and other attributes of both corporations.  Corporate actions
   approved by the Company's officers, directors and/or stockholders before the
   Effective Date will remain in effect, and USZ will be bound by them.

   On April 22, 1998, IMCO Recycling Inc. ("IMCO"), a public company, signed a
   letter of intent to acquire USZ.  The purchase price is expected to total
   approximately $72 million to be paid through cash, the assumption of debt and
   the issuance of new IMCO common shares in a privately negotiated transaction.
   In addition, the transaction provides for additional payments depending on
   future earnings performance and issuance of four-year warrants to purchase
   1.5 million shares of IMCO common stock.  On July 21, 1998, a definitive
   agreement was signed, with an effective date of July 1, 1998.  

   On June 29, 1998, the shareholders of MetalChem transferred and assigned
   shares to an affiliate of MetalChem, making the ownership structure 1/4 among
   each of the shareholders.

   DESCRIPTION OF BUSINESS - Gulfmet is headquartered in Houston, Texas, and its
   business primarily consists of manufacturing value-added zinc products.
   These zinc products, consisting primarily of zinc dust, zinc oxide, zinc
   ingot and various zinc by-products, are manufactured at five locations in the
   United States, with sales offices in the United States, Canada and Germany.
   Gulfmet's major customers include tire and rubber manufacturers, steel
   galvanizers, and paint and chemical manufacturers.

   MetalChem and Western are located in Pittsburgh, Pennsylvania and Los
   Angeles, California, respectively. MetalChem also has satellite offices in
   Germany and Canada. Operations of these companies consist primarily of buying
   and reselling secondary zinc-bearing materials.

   PRINCIPLES OF COMBINATION - The combined financial statements include the
   accounts and operations of Gulfmet, its majority-owned subsidiary, U.S. Zinc
   Corporation ("USZ"), MetalChem and Western (the "Company").  Gulfmet owns 80%
   of USZ.  The remaining 20% is owned by the shareholders of Gulfmet and is
   included in these combined financial statements.  Both MetalChem and Western
   are 100% owned 

                                     F-21
<PAGE>
 
   by the shareholders of Gulfmet. Western is under common management with
   Gulfmet, while MetalChem is managed by separate personnel. All material
   intercompany accounts and transactions have been eliminated in combination.
   
   The accompanying unaudited combined financial statements have been prepared
   in accordance with generally accepted accounting principles for interim
   financial information and Rule 10-01 of Regulation S-X.  Accordingly, they do
   not include all the information and footnotes required by generally accepted
   accounting principles for complete financial statements.  In the opinion of
   management, all adjustments, consisting only of normal recurring adjustments,
   have been made which are necessary to fairly present the financial position
   of the Company as of June 30, 1998 and the results of its operations and cash
   flows for the interim period ended June 30, 1998.  The results of the interim
   period should not be regarded as necessarily indicative of results that may
   be expected for the entire year.  The financial information presented herein
   should be read in conjunction with the audited financial statements and notes
   included in the Company's combined financial statements for the year ended
   December 31, 1997.

   NEW ACCOUNTING PRONOUNCEMENTS - SFAS No. 129, "Disclosure of Information
   About Capital Structure," was issued in February 1997 and establishes
   standards for disclosing information about an entity's capital structure.
   This statement is effective for fiscal years beginning after December 15,
   1997.

   SFAS No. 130, "Reporting Comprehensive Income," was issued in June 1997 and
   requires disclosure of all nonstockholder changes in equity during a period.
   This statement is effective for fiscal years beginning after December 15,
   1997.

   SFAS No. 133, "Accounting for Derivative Instruments and Hedging Activities"
   was issued in June 1998 and establishes certain reporting and accounting
   requirements for entities which hold such instruments or engage in such
   activities.  This statement is effective for all fiscal quarters of fiscal
   years beginning after June 15, 1999.

   Statement of Position 98-5 was issued in April 1998 and is effective for
   fiscal years beginning after December 15, 1998.  This statement requires that
   organization and start-up costs for a Company be expensed as incurred.

   The Company's management expects that adoption of these statements other than
   SFAS 133, if required, will not have a material effect on the Company's
   combined financial position or results of operations but will impact future
   financial statement disclosure.  Management has not completed their
   evaluation of SFAS 133 and accordingly, its impact on the Company's combined
   financial position or results of operations cannot be determined at this
   time.

2. SUBSEQUENT EVENTS

   On July 1, 1998, the shareholders of MetalChem and Western contributed their
   shares to USZ, for no consideration, making both companies wholly owned
   subsidiaries of USZ, to be included in the sale to IMCO.

   During July 1998, IMCO repaid the full amount outstanding under the Company's
   line of credit (see Note 5).

                                     F-22
<PAGE>
 
3. INVENTORIES

   Inventories consisted of the following:

                                            (000'S)
                                            -------
                                  June 30,           December 31,
                                    1998                1997 
                                  --------             -------- 
 
       Finished goods             $  4,077             $  4,347      
       Raw materials                 5,068                8,783
       By-products                     501                2,124
                                  --------             --------  
 
       Total                      $  9,646             $ 15,254
                                  ========             ========
 

   At June 30, 1998, the LIFO reserve was $1,344,000.  Cost of sales for the six
   months ended June 30, 1998, would have increased by $657,000 if the first-in
   first-out cost method had been used. At December 31, 1997 the LIFO reserve 
   was $2,001,000.  Cost of Sales for the year ended December 31, 1997 would 
   have decreased by $1,437,000 if the first-in first-out method had been used.

4. OTHER ASSETS

   Other assets consisted of the following:

                                            (000'S)
                                            -------
                                  June 30,           December 31,
                                    1998                1997 
                                  --------             -------- 

       Goodwill                   $    245             $    245
       Organization costs 
        and noncompete
        agreements                     162                  162 
       Financing costs                  83                   83
       Deposits and bonds              466                  166
       Other                            39                  339  
                                  --------             -------- 

       Total                           995                  995

       Less accumulated
        amortization                   275                  247
                                  --------             -------- 

       Total                      $    720             $    748    
                                  ========             ========   

                                     F-23
<PAGE>
 
5. NOTES PAYABLE, LONG-TERM DEBT AND FINANCING ARRANGEMENTS

   Long-term debt consisted of the following:


<TABLE>
<CAPTION>
                                                                                      (000'S)
                                                                               June 30     December 31
                                                                                1998           1997
                                                                            ------------   ------------
<S>                                                                         <C>            <C>         
Term note payable to a bank, due in monthly installments of approximately
   $75,000, plus interest at a variable rate,
   maturing August 2002                                                     $      3,643   $      4,108
Note payable to a third party, due in equal monthly installments
   of approximately $25,000, including interest imputed at 6%,
   maturing February 1999                                                            150            319
Revolving line of credit with a bank, plus interest at a floating
   rate, maturing June 1999                                                       14,655         21,274
Obligation under capital leases                                                      155            159
                                                                            ------------   ------------

Total                                                                             18,603         25,860

Less current maturities                                                            1,094          1,226
                                                                            ------------   ------------

Total                                                                       $     17,509   $     24,634
                                                                            ============   ============
</TABLE>


   Gulfmet has a term loan with a bank.  During 1995, Gulfmet renegotiated its
   term agreement with a new loan of $6,500,000 due in monthly installments of
   approximately $75,000 plus interest at London Interbank Offered Rates
   ("LIBOR"), plus 2.50% (8.1563% at June 30, 1998), and is collateralized by
   substantially all of its capital assets.  The terms of the commitment
   require, among other things, Gulfmet to meet certain financial ratios,
   maintain a minimum tangible net worth and limit dividend payments and
   investments in, and advances to, subsidiaries and affiliates.  At June 30,
   1998, the Company was in compliance with all debt covenants.

   Gulfmet satisfies its short-term debt requirements through a revolving line
   of credit agreement with a bank.  During 1997, Gulfmet renegotiated its
   revolving line of credit facility with terms and covenants similar to its
   previous credit line.  The loan agreement provides for a revolving line of
   credit aggregating $25,000,000, subject to a combined borrowing base
   limitation of eligible accounts receivable and inventory.  The credit line
   bears interest at LIBOR plus a variable rate, ranging from 1.00% to 2.25%,
   dependent on Gulfmet's funded debt ratio; such rate was 6.91% at June 30,
   1998 and is collateralized by accounts receivable and inventory.  Amounts
   available under the credit agreement totaled $10,345,000 at June 30, 1998.
   The terms of the agreement require, among other things, Gulfmet to meet
   certain financial ratios, maintain minimum tangible net worth and limit
   dividend payments and investments in, and advances to, subsidiaries and
   affiliates.  At June 30, 1998, the Company was in compliance with all debt
   covenants.

   On July 21, 1998, IMCO paid off the outstanding balance of $15,725,000 under
   the Company's revolving line of credit.  In addition, IMCO also paid $201,865
   for various fees and expenses such as interest, commitment fees, letters of
   credit and escrow fees.

   During 1997 and 1998, Gulfmet entered into capital leases with an unrelated
   party for forklifts.  Each lease meets the criteria of a capital lease as
   defined by SFAS No. 13, "Accounting for Leases," which defines a capital
   lease generally as one which transfers benefits and risks of ownership to the
   lessee.  The assets have been capitalized as machinery and equipment in an
   amount equal to the present value of the future minimum lease payments at the
   inception of the lease and are being depreciated over the life of the

                                     F-24
<PAGE>
 
   respective lease.  A corresponding liability was recorded as long-term debt.
   Principal and interest payments during the six months ended June 30, 1998
   totaled $33,453 and $6,004, respectively.  At June 30, 1998, assets
   capitalized under capital leases amounted to $219,319 less accumulated
   depreciation of $56,845.  Depreciation expense of $36,552 has been recorded
   and included in depreciation and amortization.  At June 30, 1998, the current
   and long-term portions of the future minimum lease obligations were $69,335
   and $85,579, respectively.

6. CONTINGENCIES AND COMMITMENTS

   The Company is involved in various litigation matters arising in the normal
   course of its business.  Management believes it has adequate legal defenses
   or insurance coverage and that the ultimate outcome of such litigation will
   not have a materially adverse effect on the Company's financial position or
   results of operations.

   Gulfmet's operations are subject to environmental laws and regulations, and
   Gulfmet is involved in ongoing proceedings and communications with regulatory
   authorities concerning environmental matters.  It is possible that as a
   result of these proceedings and communications, Gulfmet may in the future
   incur additional costs to assure compliance with environmental laws and
   regulations.  In the opinion of management, the disposition of these claims
   will not have a materially adverse effect on the Company's financial position
   or results of operations.

                                    ******

                                     F-25
<PAGE>
 
PRO FORMA FINANCIAL INFORMATION

The accompanying unaudited Pro Forma Condensed Consolidated Financial Statements
have been prepared by recording pro forma adjustments to the historical
consolidated financial statements of IMCO Recycling Inc. (the "Company"). The
Pro Forma Condensed Consolidated Balance Sheet as of June 30, 1998 has been
prepared as if the Company's July 1998 acquisition of U.S. Zinc Corporation and
its Subsidiaries ("U.S. Zinc") was consummated on June 30, 1998. The Proforma
Condensed Consolidated Statement of Earnings for the six months ended June 30,
1998 has been prepared as if the U.S. Zinc acquisition had been consummated on
January 1, 1998. The Pro Forma Condensed Consolidated Statement of Earnings for
the year ended December 31, 1997 has been prepared as if the Company's November
1997 acquisition of Alchem Aluminum, Inc. ("Alchem") and its U.S. Zinc
acquisition had both been consummated on January 1, 1997.

The Pro Forma Condensed Consolidated Statement of Earnings for the year ended
December 31, 1997 has been derived from (i) the historical audited consolidated
financial statements of the Company for the year ended December 31, 1997, (ii)
the historical audited combined financial statements of Gulfmet Holdings, Inc.,
MetalChem, Inc. & Western Zinc Corporation for the year ended December 31, 1997,
and (iii) the historical financial statements of Alchem for the 10 months ended
October 31, 1997, as adjusted.

Subsequent to December 31, 1997, (i) Gulfmet Holdings, Inc., the 80% parent
corporation of U.S. Zinc, was merged with and into U.S. Zinc, and (ii) the
shares of capital stock of MetalChem, Inc. and Western Zinc Corporation were
contributed by their shareholders to U.S. Zinc.  See Note 2 of the Notes to
Audited Combined Financial Statements.

The Pro Forma Condensed Consolidated Statement of Earnings for the six months
ended June 30, 1998 and the Pro Forma Condensed Consolidated Balance Sheet at
June 30, 1998 have been derived from (i) the historical unaudited consolidated
financial statements of the Company as of and for the six-month period ended
June 30, 1998 and (ii) the historical unaudited combined financial statements of
U.S. Zinc as of and for the six month period ended June 30, 1998.

The Pro Forma Condensed Consolidated Financial Statements are not necessarily
indicative of the financial position or results of operations that would have
occurred had the transactions been effected on the assumed dates.  Additionally,
future results may vary significantly from the results reflected in the Pro
Forma Condensed Consolidated Statements of Earnings due to normal fluctuations
in operating levels, changes in prices, future transactions and other factors.

Each of the acquisitions was accounted for by the purchase method.  Accordingly,
the assets and liabilities of U.S. Zinc have been adjusted to their estimated
fair values, as determined by the management of the Company, to reflect the
allocation of the costs of the acquisitions by the Company.

                                     F-26
<PAGE>
 
                              IMCO RECYCLING INC.
            PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF EARNINGS
                     FOR THE YEAR ENDED DECEMBER 31, 1997
                                  (UNAUDITED)
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)

<TABLE> 
<CAPTION>

                                                                        PRO FORMA FOR THE ALCHEM ACQUISITION         
                                                                    -------------------------------------------
                                                                     HISTORICAL                                       
                                                                     10 MONTHS                                        
                                                                       ENDED                                           
                                                   COMPANY          OCTOBER 31,     PRO FORMA            PRO         
                                                  HISTORICAL           1997        ADJUSTMENTS          FORMA        
                                                  ----------        -----------    -----------        ---------
<S>                                               <C>               <C>            <C>                <C> 
Revenues                                          $  339,381        $   125,877    $  (3,694) A1      $ 461,564     
Cost of sales                                        291,527            114,949       (3,694) A1        402,907     
                                                                                         125  A2                     
                                                  ----------        -----------    ---------          ---------
Gross profit                                          47,854             10,928         (125)            58,657     
Selling, general and administrative expense           17,612             10,037          332  A3         22,981     
                                                                                      (5,000) A4                     
Interest expense                                       7,331                688        1,030  A5          9,049     
Interest income                                         (413)               (14)                           (427)    
Equity in (earnings)/loss of affiliates                 (182)                 -                            (182)    
                                                  ----------        -----------    ---------          ---------
Earnings before provision for income                                                                                
   taxes and minority interests                       23,506                217        3,513             27,236     
Provision for income taxes                             9,086                  -        1,455  A6         10,541     
                                                  ----------        -----------    ---------          ---------
Earnings before minority interests                    14,420                217        2,058             16,695     
Minority interests, net of provision for                                                                            
   income taxes                                         (293)                 -                            (293)    
                                                  ----------        -----------    ---------          ---------
Net earnings before extraordinary item            $   14,127        $       217    $   2,058          $  16,402     
                                                  ==========        ===========    =========          =========
                                                                                                                    
Net earnings before extraordinary item 
   per common share:                                                                                      
   Basic                                          $     1.08                                          $    1.16  
   Diluted                                        $     1.06                                          $    1.14  
                                                                                                                    
Weighted average common and common                                                                                  
   equivalent shares outstanding:                                                                                   
   Basic                                              13,066                           1,083  A7         14,149     
   Diluted                                            13,293                           1,083  A7         14,376     

<CAPTION>

                                                    PRO FORMA FOR THE U.S. ZINC ACQUISITION
                                                  ---------------------------------------------

                                                   HISTORICAL
                                                   YEAR ENDED
                                                  DECEMBER 31,      PRO FORMA            PRO
                                                     1997           ADJUSTMENTS         FORMA
                                                  ------------     ------------       ---------
<S>                                               <C>              <C>                <C> 
Revenues                                          $    164,515                        $ 626,079
Cost of sales                                          151,918     $  (1,017) B1        554,008
                                                                         200  B2
                                                  ------------     ---------          ---------
Gross profit                                            12,597           817             72,071
Selling, general and administrative expense              6,781         1,252  B3         29,553
                                                                      (1,461) B4
Interest expense                                         2,050         2,683  B5         13,782
Interest income                                           (178)                            (605)
Equity in (earnings)/loss of affiliates                    934          (934) B4           (182)
                                                  ------------     ---------          ---------
Earnings before provision for income             
   taxes and minority interests                          3,010          (723)            29,523
Provision for income taxes                                 374           511  B6         11,426
                                                  ------------     ---------          ---------
Earnings before minority interests                       2,636        (1,234)            18,097
Minority interests, net of provision for         
   income taxes                                              -                             (293)
                                                  ------------     ---------          ---------
Net earnings before extraordinary item            $      2,636     $  (1,234)         $  17,804
                                                  ============     =========          =========
                                                 
Net earnings before extraordinary item 
   per common share:                   
   Basic                                                                              $    1.23
   Diluted                                                                            $    1.21
                                                 
Weighted average common and common               
   equivalent shares outstanding:                
   Basic                                                                 298  B8         14,447
   Diluted                                                               298  B8         14,674
</TABLE> 

      See Notes to Pro Forma Condensed Consolidated Financial Statements.

                                     F-27
<PAGE>
 
                              IMCO RECYCLING INC.
            PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF EARNINGS
                    FOR THE SIX MONTHS ENDED JUNE 30, 1998
                                  (UNAUDITED)
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)


<TABLE> 
<CAPTION> 
                                                  COMPANY         U.S. ZINC         PRO FORMA            PRO
                                                 HISTORICAL       HISTORICAL       ADJUSTMENTS          FORMA
                                                 ----------       ----------       -----------        ---------
<S>                                              <C>              <C>              <C>                <C>        
Revenues                                         $  251,721       $   82,047                          $ 333,768
Cost of sales                                       223,921           76,326       $  (435) B1          299,912
                                                                                       100  B2 
                                                 ----------       ----------       -------            ---------
Gross profit                                         27,800            5,721           335               33,856
Selling, general and administrative expense           9,666            2,718           626  B3           11,838
                                                                                    (1,172) B4 
Interest expense                                      3,799              844         1,449  B5            6,092
Interest income                                        (199)             (20)                              (219)
Equity in (earnings)/loss of affiliates              (1,028)               -                             (1,028)
Other, net                                                -              127                                127
                                                 ----------       ----------       -------            ---------
Earnings before provision for income                                                           
   taxes and minority interests                      15,562            2,052          (568)              17,046
Provision for income taxes                            5,737              608           218  B6            6,563
                                                 ----------       ----------       -------            ---------
Earnings before minority interests                    9,825            1,444          (786)              10,483
Minority interests, net of provision for                                                       
   income taxes                                        (203)               -                               (203)
                                                 ----------       ----------       -------            ---------
Net earnings                                     $    9,622       $    1,444       $  (786)           $  10,280
                                                 ==========       ==========       =======            =========
                                                                                               
Net earnings per common share:                                                                 
   Basic                                         $     0.58                                           $    0.61
                                                 ==========                                           =========
   Diluted                                       $     0.57                                           $    0.60
                                                 ==========                                           =========
Weighted average common and common                                                             
   equivalent shares outstanding:                                                              
   Basic                                             16,574                            298  B8           16,872
   Diluted                                           16,766                            298  B8           17,064
</TABLE> 


      See Notes to Pro Forma Condensed Consolidated Financial Statements.

                                     F-28
<PAGE>
 
                              IMCO RECYCLING INC.
           CONDENSED CONSOLIDATED UNAUDITED PRO FORMA BALANCE SHEET
                                 JUNE 30, 1998
                                (IN THOUSANDS)

<TABLE> 
<CAPTION> 
                                                      IMCO        U.S. ZINC         PRO FORMA            PRO
                                                   HISTORICAL     HISTORICAL       ADJUSTMENTS          FORMA
                                                   ----------     ----------       -----------        --------- 
<S>                                                <C>            <C>              <C>                <C> 
ASSETS
Current assets
     Cash and cash equivalents                     $    8,680     $    1,316       $ 62,296  B7       $   9,996           
                                                                                    (46,369) B8                
                                                                                    (15,927) B9                
      Accounts receivable                              45,314         24,095                             69,409
      Inventories                                      32,272          9,646            201  B11         42,119
      Deferred income taxes                             3,170              -                              3,170
      Other current assets                              2,766          1,330                              4,096
                                                   ----------     ----------       --------           --------- 
      Total current assets                             92,202         36,387            201             128,790
 Property and equipment, net                          148,642         12,335          2,000  B11        162,977
 Intangible assets                                     74,940            215          2,665  B10        114,120
                                                                                     36,300  B11               
 Investments in affiliates                             14,889              -         54,869  B8          14,889
                                                                                    (54,869) B11               
 Other assets, net                                     10,695            571            (31) B11         11,235
                                                   ----------     ----------       --------           --------- 
                                                   $  341,368     $   49,508       $ 41,135           $ 432,011
                                                   ==========     ==========       ========           ========= 
                                                                                                               
                                                                                                               
LIABILITIES AND STOCKHOLDERS' EQUITY                                                                           
Current liabilities                                                                                            
      Accounts payable                             $   30,971     $   12,695                          $  43,666
      Accrued liabilities                               8,921            504       $  2,165  B10         11,590
      Current maturities of long-term debt                498          1,119                              1,617
                                                   ----------     ----------       --------           --------- 
      Total current liabilities                        40,390         14,318          2,165              56,873
 Long-term debt                                       101,058         17,484         62,296  B7         164,911
                                                                                    (15,927) B9               
 Deferred income taxes                                 11,358          1,307           (400) B10         12,265
 Other long-term liabilities                            9,194              -            900  B10         10,094
                                                                                                               
 Stockholders' equity                                 179,368         16,399          8,500  B8         187,868
                                                                                    (16,399) B11               
                                                   ----------     ----------       --------           --------- 
                                                   $  341,368     $   49,508       $ 41,135           $ 432,011 
                                                   ==========     ==========       ========           ========= 
</TABLE> 

      See Notes to Pro Forma Condensed Consolidated Financial Statements.


                                     F-29
<PAGE>
 
                              IMCO RECYCLING INC.
        NOTES TO PRO FORMA CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
 
A.  PRO FORMA ADJUSTMENTS FOR THE ALCHEM ACQUISITION

    In November 1997, the Company acquired all of the outstanding capital stock
    of Alchem. The acquisition was accounted for using the purchase method of
    accounting. The pro forma adjustments to the historical financial statements
    for the Alchem acquisition are as follows:


    A1.  To eliminate sales and cost of sales for transactions between Alchem
         and the Company.

    A2.  To reflect additional depreciation expense based on the fair value of
         the assets acquired. Pro forma depreciation is computed on a straight-
         line basis over the estimated useful lives of the assets acquired.

    A3.  To adjust amortization expense for the goodwill acquired and Alchem's
         debt issuance costs written-off. Goodwill is amortized on a straight-
         line basis over a 40 year life.

    A4.  To eliminate S G & A expenses which would not have been incurred.

    A5.  To record the net increase in interest expense due to borrowings under
         the Amended and Restated Credit Agreement using the applicable LIBOR
         rate plus 1.5%, less interest expense on the Alchem indebtedness
         retired. An increase of .125% in the assumed interest rate would
         increase pro forma interest expense related to the Alchem acquisition
         by $33,000 for the year ended December 31, 1997.

    A6.  To adjust income tax expense based on the combined effective federal
         and state income tax rates.

    A7.  To record the acquisition of the capital stock of Alchem.

B.  PRO FORMA ADJUSTMENTS FOR THE U.S. ZINC ACQUISITION

    In July 1998, the Company acquired all of the outstanding stock of U.S. Zinc
    Corporation and its subsidiary corporations ("U.S. Zinc"). U.S. Zinc is the
    surviving corporation in a merger which occurred on April 1, 1998. The
    acquisition was accounted for using the purchase method of accounting. The
    pro forma adjustments to the historical combined audited financial
    statements for the period ending December 31, 1997, and to the unaudited
    combined financial statements as of and for the period ending June 30, 1998
    are as follows:

    B1.  To eliminate the impact on U.S. Zinc's results related to conforming to
         the Company's method of accounting for inventory.

    B2.  To reflect additional depreciation expense based on the fair value of
         the assets acquired. Pro forma depreciation is computed on a straight-
         line basis over the estimated useful lives of the assets acquired.

    B3.  To adjust amortization expense for the goodwill acquired and U.S.
         Zinc's old intangible assets which were written-off. Goodwill is
         amortized on a straight-line basis over a 30 year life.

    B4.  To eliminate duplicate management costs on U.S. Zinc's books which will
         be eliminated, and to eliminate equity loss on businesses previously 
         disposed.


                                     F-30
<PAGE>
 
    B5.  To record the net increase in interest expense due to borrowings under
         the Amended and Restated Credit Agreement using the applicable LIBOR
         rate plus 1%, less interest expense on the U.S. Zinc indebtedness
         retired. An increase of .125% in the assumed interest rate would
         increase pro forma interest expense related to the U.S. Zinc
         acquisition by $78,000 for the year ended December 31, 1997 and $39,000
         for the six months ended June 30, 1998.

    B6.  To adjust income tax expense based on the combined effective federal
         and state income tax rates.

    B7.  To record borrowings to fund the cash portion of the purchase price and
         for repayment of U.S. Zinc's outstanding obligations under terms of
         their credit agreement.

    B8.  To record the purchase of the capital stock of U.S. Zinc.

    B9.  To repay U.S. Zinc's outstanding credit agreement obligations.

    B10. To record merger related costs and other purchase accounting accruals.
 
    B11. To record the preliminary purchase price allocation as follows 
         (in 000's):

                Working Capital         $ 20,105
                Property & Equipment      14,335
                Goodwill                  39,180
                Other Noncurrent Assets      540
                Noncurrent Liabilities   (19,291)
                                        --------
                                        $ 54,869
                                        ========


                                     F-31

<PAGE>
 
                                                                     EXHIBIT 2.3

         AMENDMENT NO. 1 TO MEMORANDUM OF PURCHASE AND SALE AGREEMENT



     This Amendment No. 1 to the Memorandum of Purchase and Sale Agreement,
dated July 21, 1998 (the "Agreement"), by and among IMCO Recycling Inc., a
Delaware corporation ("Buyer"), and each of The Minnette and Jerome Robinson
Community Property Trust, a Texas trust, The Minnette and Jerome Robinson
Foundation, The Minnette and Jerome Robinson Charitable Remainder Trust, a Texas
trust, M. Russ Robinson, Howard Robinson and Mindy Robinson Brown, all residents
of the state of Texas, (collectively, "Shareholders") is made by and among Buyer
and the Shareholders (acting by and through M. Russ Robinson individually and as
the Shareholders' Representative in accordance with Section 7 of the Agreement)
effective as of the 20th day of August, 1998. Capitalized terms used but not
defined herein have the meanings ascribed to them in the Agreement.

                             W I T N E S S E T H:
                             ------------------- 

     WHEREAS, Buyer and the Shareholders have entered into the Agreement;

     WHEREAS, the closing of the transactions contemplated by the Agreement
occurred on July 21, 1998 (the "Closing Date");

     WHEREAS, the parties to the Agreement wish to amend the Agreement to
memorialize certain understandings among them in connection with the terms and
conditions set forth in Sections 2.3(c) and 2.3(d) of the Agreement;

     NOW, THEREFORE, Buyer and the Shareholders hereby agree as follows:

1.   Section 2.3(c) of the Agreement is hereby deleted in its entirety and
     replaced with the following in lieu thereof:

               "(c) In the event the Net Worth is less than $16,750,000 as of
          the Effective Date, then the amount of the Cash Component to be paid
          to Shareholders as described in Section 2.2(a) herein shall be reduced
          by an amount (if any) equal to the difference between $16,750,000 and
          the Net Worth as of the Effective Date."

2.   Section 2.3(d) of the Agreement is hereby amended by deleting the third
     sentence thereof and replacing it with the following in lieu thereof:

               "Buyer will deliver the Closing Financial Statements to
          Shareholders within forty-five (45) days after the Closing Date."

              [the remainder of this page is intentionally blank]
<PAGE>
 
3.   Except as expressly modified by the terms hereof, the terms and conditions
     of the Agreement shall remain in full force and effect for all purposes.
     This Amendment No. 1 may be executed in one or more counterparts, each of
     which will be deemed to be an original copy of this Amendment No. 1 and all
     of which, when taken together, will be deemed to constitute one and the
     same agreement.

     IN WITNESS WHEREOF, the undersigned have executed this Amendment No. 1 to
the Memorandum of Purchase and Sale Agreement effective as of the day and year
first above written.


                              BUYER:

                              IMCO RECYCLING INC.



                              /s/ DON V. INGRAM
                              --------------------------------------------------
                              DON V. INGRAM, Chief Executive Officer



                              SHAREHOLDERS:


                              /s/ M. RUSS ROBINSON
                              --------------------------------------------------
                              M. RUSS ROBINSON, acting individually and in his
                              capacity as Shareholders' Representative in
                              accordance with the terms of Section 7 of the
                              Agreement, for and on behalf of M. Russ Robinson,
                              Howard Robinson, Mindy Robinson Brown, The
                              Minnette and Jerome Robinson Community Property
                              Trust, The Minnette and Jerome Robinson
                              Foundation, and the Minnette and Jerome Robinson
                              Charitable Remainder Trust.



                                       2

<PAGE>

                                                                    EXHIBIT 23.1

INDEPENDENT AUDITORS' CONSENT


We consent to the incorporation by reference in Registration Statement No. 33-
26641, Registration Statement No. 33-34745, Registration Statement No. 33-76780,
Registration Statement No. 333-00075, and Registration Statement No. 333-07091
of IMCO Recycling Inc. each on Form S-8 of our report dated August 17, 1998 on
the combined financial statements of Gulfmet Holdings, Inc., MetalChem, Inc.,
and Western Zinc Corporation, appearing in this Form 8-K of IMCO Recycling Inc.
for the year ended December 31, 1997.


/s/ DELOITTE & TOUCHE LLP

DELOITTE & TOUCHE LLP
Houston, Texas

October 5, 1998




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