AMENDMENT NO. 1 DATED AS OF MARCH 12, 1997 TO LOAN AND SECURITY AGREEMENT DATED AS OF MARCH 15, 1995 AMONG ZEMEX CORPORATION AND THE FELDSPAR CORPORATION AND NATIONSBANK OF TENNESSEE, N.A., AND THE CHASE MANHATTAN BANK AND NATIONSBANK OF TENNESSEE, N.A., AS AGENT <PAGE 2> TABLE OF CONTENTS 1. Definitions 2 2. Amendments to Agreement 2 3. Representations and Warranties 13 3.1. Incorporation 13 3.2. Due Authorization, No Conflicts, Etc. 13 3.3. Due Execution, Etc. 14 3.4. Real Property 14 4. Conditions Precedent 14 4.1. Conditions Precedent to Effectiveness of Amendment No. 14 5. Effectiveness of Amendment No. 1 17 6. Closing 17 7. Post Closing Deliveries 17 8. Governing Law, Etc. 18 9. Section Titles and Table of Contents 18 10. Waiver of Jury Trial 18 11. Counterparts 18 12. Agreement to Remain in Effect 18 <PAGE 1> AMENDMENT NO. 1 dated as of March 12, 1997, under and to that certain Loan and Security Agreement dated as of March 15, 1995 (the "Agreement"), among Zemex Corporation, a Delaware corporation, and The Feldspar Corporation, a North Carolina corporation (individually and collectively, the "Borrower"), the Guarantors, jointly and severally, including the additional Participating Subsidiaries; each of the undersigned Banks (in such capacity the "Banks") and NationsBank of Tennessee, N.A. as agent for the Banks (in such capacity the "Agent"). W I T N E S S E T H: WHEREAS, Borrower, the Banks and the Agent are parties to the Agreement; and WHEREAS, Borrower has formed a new subsidiary, Zemex Industrial Minerals, Inc., a Delaware corporation, and has also acquired all of the stock of Alumitech, Inc., a Delaware corporation, located in Streetsboro, Ohio; and WHEREAS, Alumitech, Inc. has two subsidiaries, being Engineered Thermal Systems, Inc., an Ohio corporation, and Aluminum Waste Technology, Inc., a Delaware corporation; and WHEREAS, Aluminum Waste Technology, Inc. has one subsidiary, being AWT Properties, Inc., an Ohio corporation; and WHEREAS, Borrower desires to have all five (5) corporations become Participating Subsidiaries under the Agreement; and WHEREAS, the Borrower has requested that the Banks increase their Revolving Loan Commitments from $10,000,000 to $30,000,000, and provide for the issuance of standby letters of credit in aggregate amounts up to $18,000,000 as a subfacility under the Revolving Loan Commitments; WHEREAS, the Banks are willing to increase their Revolving Loan Commitments, provide for the issuance of letters of credit, and add Alumitech, Inc., Engineered Thermal Systems, Inc., Aluminum Waste Technology, Inc., AWT Properties, Inc. and Zemex Industrial Minerals, Inc. as Participating Subsidiaries, subject to the terms and conditions hereinafter set forth; <PAGE 2> NOW THEREFORE, in consideration of the foregoing and the mutual covenants and agreements set forth herein, and for other good and valuable consideration, the receipt and legal sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 1. Definitions. All capitalized terms used in this Amendment No. 1 which are not otherwise defined herein shall have the respective meanings ascribed thereto in the Agreement. 2. Amendments to Agreement. 2.1. Section I of the Agreement, Definitions, is hereby amended by adding thereto the following new definitions as follows: "Amendment No. 1 Effective Date" has the meaning specified in Section 5 of Amendment No. 1. "Issuing Bank" means NationsBank of Tennessee, N.A. or any successor thereto, as the issuer of Letters of Credit under Paragraph 2.9, together with its successors and assigns; provided that no successor or assign may have a letter of credit risk rating less than that accorded to letters of credit issued by NationsBank or its affiliates. "Letter of Credit" shall have the meaning assigned to such term in Paragraph 2.9, but shall exclude the Existing Pyron Letter of Credit. "Letter of Credit Documents" means, with respect to any Letter of Credit, collectively, any application for any Letter of Credit and any other agreements, instruments, guarantees or other documents (whether general in application or applicable only to such Letter of Credit) governing or providing for (a) the rights and obligations of the parties concerned or at risk with respect to such Letter of Credit or (b) any collateral security for any of such obligations. "Letter of Credit Interest" means, for each Bank, such Bank's participation interest (or, in the case of the Issuing Bank, the Issuing Bank's retained interest) in the Issuing Bank's liability under Letters of Credit and such Bank's rights and interests in Reimbursement Obligations and fees, interest and other amounts payable in connection with Letters of Credit and Reimbursement Obligations. "Letter of Credit Liability" means, without duplication, at any time and in respect of any Letter of Credit, the sum of (a) the undrawn face amount of such Letter of Credit plus (b) the aggregate unpaid principal amount of all Reimbursement Obligations of Zemex Corporation and/or the Borrower at such time due and payable in respect of all drawings made under such Letter of Credit. For purposes of this Agreement, a Bank (other than the Issuing Bank) shall be deemed to hold a Letter of Credit Liability in an amount equal to its participation interest in the related Letter of Credit under Paragraph 2.9, and the Issuing Bank shall be deemed to hold a Letter of Credit Liability in an amount equal to its retained interest in the related Letter of Credit after giving effect to the acquisition by the Banks (other than the Issuing Bank) of their participation interests under Paragraph 2.9. "Quarterly Dates" means the first day of each January, April, July, or October, commencing with April 1, 1997. <PAGE 3> "Quarterly Period" means (a) the Period from the Amendment No. 1 Effective Date to the next succeeding Quarterly Date and (b) thereafter, any period from the first day after a Quarterly Date to the next succeeding Quarterly Date. "Reimbursement Obligations" means, at any time, the obligation of Zemex Corporation and/or the Borrower then outstanding, or which may thereafter arise in respect of any or all Letters of Credit then outstanding, to reimburse amounts paid by the Issuing Bank and the other Banks with respect to their Letter of Credit Interests in respect of any drawings under a Letter of Credit. In addition to the foregoing new definitions, the following definitions are hereby amended: (i) "Adjusted Surplus Capital" is hereby amended to replace the date of September 30, 1994 with the date of September 30, 1996 and to replace the date of December 31, 1995 with the date of December 31, 1996; (ii) "Collateral Documents" is hereby amended to add the following documents: the Stock Pledge Agreement from Alumitech, Inc. pledging its stock in both Engineered Thermal Systems, Inc. and Aluminum Waste Technology, Inc., as well as the Stock Pledge Agreement from Aluminum Waste Technology, Inc. pledging its stock in AWT Properties, Inc., all as required by Paragraph 4.1(g) below; the Guaranty and Suretyship Agreements of Alumitech, Inc., Engineered Thermal Systems, Inc., Aluminum Waste Technology, Inc., AWT Properties, Inc., and Zemex Industrial Minerals, Inc. required by Paragraph 4.1(e) below; and, with respect to all Collateral Documents, all documents amending, modifying and/or restating any Collateral Document from time to time; (iii) the terms "Letter of Credit Facility", "Letter of Credit Fees", "Letter of Credit Liability", "Letter of Credit Reimbursement Agreement" and "Letter of Credit Reimbursement Agreement Guaranty" presently appearing in the Agreement prior to this Amendment No. 1 are hereby each amended to place in front of each term the words "Existing Pyron", such that the new terms are retitled and placed in proper alphabetical sequence as follows: "Existing Pyron Letter of Credit Facility", "Existing Pyron Letter of Credit Fees", "Existing Pyron Letter of Credit Liabilities", "Existing Pyron Letter of Credit Reimbursement Agreement", and "Existing Pyron Letter of Credit Reimbursement Agreement Guaranty"; furthermore, the references contained in said definitions to the Letter of Credit Facility and Letter of Credit Reimbursement Agreement are hereby modified to refer instead to the Existing Pyron Letter of Credit Facility and the Existing Pyron Letter of Credit Reimbursement Agreement; (iv) "Obligations" is hereby amended to change subparagraphs (B), (C) and (D) to subparagraphs (C), (D) and (E) and to insert a new subparagraph (B) as follows: "(B) To pay all Letter of Credit Liabilities, including any Reimbursement Obligations and any other amount owed by Zemex Corporation and/or the Borrower under any Letter of Credit Documents;" (v) "Loan Documents" is hereby amended to insert before the clause "and the Collateral Documents," the clause "the Letter of Credit Documents,"; (vi) "Participating Subsidiary" is hereby amended to add the following corporations as subparagraphs (E) through (I), respectively, as follows: Alumitech, Inc., a Delaware corporation; Engineered Thermal Systems, Inc., an Ohio corporation; Aluminum Waste Technology, Inc., a Delaware corporation, AWT Properties, Inc., an Ohio corporation, and Zemex Industrial Minerals, Inc., a Delaware corporation; and each of the foregoing shall also be a Subsidiary for the purposes of the Agreement; <PAGE 4> (vii) "Surplus Capital" is hereby amended by deleting the definition therein contained and replacing it with the definition of: "means Ten Million Dollars ($10,000,000.00)"; and (viii) "Working Capital Loan Termination Date" is hereby amended to replace "June 30, 1996" with "June 30, 1997." 2.2. Paragraph 2.1(A) is hereby amended by deleting everything after the subtitle in its entirety and replacing it with the following: (A) Subject to the terms and conditions of and relying on the representations, warranties and covenants contained in this Agreement, through the day prior to the Loan Termination Date, each Bank agrees to fund severally but not jointly to the Borrower the amount set out beside their names, which for all of the Banks shall be an aggregate maximum principal amount of up to Thirty Million Dollars ($30,000,000.00), as follows: Banks Revolving Loan Commitments NationsBank of Tennessee, N.A. $15,000,000.00 The Chase Manhattan Bank $15,000,000.00 TOTAL $30,000,000.00 The Revolving Loans shall be evidenced by the (i) Fifteen Million Dollars ($15,000,000.00) Note of Borrower to NationsBank of Tennessee, N.A., and (ii) the Fifteen Million Dollars ($15,000,000.00) Note of Borrower to The Chase Manhattan Bank, which Notes are substantially in the form set forth in Exhibit A- 1 attached hereto, with each Note payable in accordance with its terms. The Borrower may obtain Loans, repay without penalty or premium except as set forth in Paragraph 2.13 below and reborrow hereunder, from the date of this Agreement up to the day prior to the Loan Termination Date, the then available Revolving Loan Commitments or any lesser sum which is in the minimum amount of One Million Dollars ($1,000,000.00) and in an integral multiple of Two Hundred Fifty Thousand Dollars ($250,000.00) in the case of Eurodollar Loans and in the minimum amount of Two Hundred Fifty Thousand Dollars ($250,000.00) and in an integral multiple of One Hundred Thousand Dollars ($100,000.00) in the case of Floating Rate Loans; provided, however, Borrower may not borrow more than two (2) times in any calendar month. Each advance of the Revolving Loans hereunder shall be made by each Bank ratably in accordance with its respective Revolving Loan Commitment Percentage of such advance. 2.3. Paragraph 2.1 is hereby further amended in Subparagraph (B) to delete everything appearing after the semicolon and to insert in its place the following: "provided, no more than an aggregate of Eighteen Million Dollars ($18,000,000.00) may be outstanding at any one time for Letter of Credit Liabilities; and provided further, that the Banks shall have no obligation to fund and/or issue a Letter of Credit if the conditions precedent in Paragraph 3.2 below have not been satisfied nor shall the Banks have any obligation to fund any advances or issue a Letter of Credit for the purpose of constructing any new Alumitech Plants if the conditions precedent in Paragraph 3.3 below have not been satisfied." In addition, Subparagraph (D) is hereby amended to delete the last sentence thereof in its entirety. 2.4. Paragraph 2.5 is hereby amended to provide that a facility fee of $60,000 will be payable in full on the Amendment No. 1 Effective Date to the Banks. <PAGE 5> 2.5. Paragraph 2.7 is hereby amended to replace the figure of Twenty Thousand Dollars ($20,000.00) with the figure of Thirty Thousand Dollars ($30,000.00), commencing with the Agent's fee due December 31, 1997. In addition, the Borrowers shall pay a fee to the Agent of Forty Thousand Dollars ($40,000.00) on or before the Amendment No. 1 Effective Date. 2.6. Paragraphs 2.9, 2.10, 2.11, 2.12 and 2.13 are hereby renumbered, respectively, as Paragraphs 2.10, 2.11, 2.12, 2.13 and 2.14, and a new Paragraph 2.9 is hereby inserted as follows: 2.9 Letters of Credit. Subject to the terms and conditions of this Agreement, the Revolving Loan Commitments may be utilized, upon the request of Zemex Corporation, in addition to the Loans provided for by Paragraph 2.1, for the issuance by the Issuing Bank of letters of credit (collectively, but excluding the Existing Pyron Letter of Credit, the "Letters of Credit") for the account of Zemex Corporation and/or the Borrower; provided that in no event shall (i) the aggregate amount of all Letter of Credit Liabilities, together with the aggregate principal amount of the Loans exceed the aggregate amount of the Revolving Loan Commitments as in effect from time to time, (ii) the outstanding aggregate amount of all Letter of Credit Liabilities exceed $18,000,000.00 and (iii) the expiration date of any Letter of Credit extend beyond the earlier of the Loan Termination Date and the date twelve months following the issuance of such Letter of Credit. The following additional provisions shall apply to Letters of Credit: (A) Zemex Corporation and/or the Borrower shall give the Agent at least three Business Days' irrevocable prior notice (effective upon receipt) specifying the Business Day (which shall be no later than 90 days preceding the Loan Termination Date) each Letter of Credit is to be issued and describing in reasonable detail the proposed terms of such Letter of Credit (including its beneficiary) and the nature of the transactions or obligations proposed to be supported (including whether such Letter of Credit is to be a commercial letter of credit or a standby letter of credit). Zemex Corporation and/or the Borrower shall be the account party for each Letter of Credit, including Letters of Credit issuable to a beneficiary having a claim or potential claim against a Subsidiary of Zemex Corporation. (B) On each day during the period commencing with the issuance by the Issuing Bank of any Letter of Credit and until such Letter of Credit shall have expired or been terminated or, if drawn upon, until the resulting Reimbursement Obligations have been reimbursed in full by the Borrower and/or Zemex Corporation (whether by a borrowing under this agreement or otherwise), the Revolving Loan Commitment of each Bank shall be deemed to be utilized for all purposes of this Agreement in an amount equal to such Bank's Revolving Loan Commitment Percentage of the then Letter of Credit Liabilities associated with such Letter of Credit. Each Bank (other than the Issuing Bank) agrees that, upon the issuance of any Letter of Credit it shall automatically acquire a participation in the Issuing Bank's liability under such Letter of Credit in an amount equal to such Bank's Revolving Loan Commitment Percentage of such liability, and each Bank (other than the Issuing Bank) thereby shall absolutely, unconditionally and irrevocably assume, as primary obligor and not as surety, and shall be unconditionally obligated to the Issuing Bank to pay and discharge when due, its Revolving Loan Commitment Percentage of the Issuing Bank's liability under such Letter of Credit. <PAGE 6> (C) Upon receipt from the beneficiary of any Letter of Credit or any demand for payment under such Letter of Credit, the Issuing Bank shall promptly notify the Borrower and/or Zemex Corporation (through the Agent) of the amount to be paid by the Issuing Bank as a result of such demand and the date on which payment is to be made by the Issuing Bank to such beneficiary in respect of such demand. The Borrower hereby unconditionally agrees to pay and reimburse the Agent for the account of the Issuing Bank and the other Banks with respect to their Letter of Credit Interest for the amount of each demand for payment under such Letter of Credit at or prior to the date on which payment is to be made by the Issuing Bank to the beneficiary under such Letter of Credit, without presentment, demand, protest or other formalities of any kind. Any amounts not so paid or borrowed as set forth in (D) below shall bear interest at the rate(s) specified in the Letter of Credit Documents or, if higher, at the rate(s) specified on the Revolving Notes (including the Default Rate, if applicable). (D) Forthwith upon its receipt of a notice referred to in clause (C) of this Paragraph 2.9, the Borrower shall advise the Agent whether or not the Borrower intends to borrow under Paragraph 2.1 to finance the obligation to reimburse the Issuing Bank for the amount of the related demand for payment and, if it does, submit a notice of such borrowing as provided in Paragraph 2.4. In the event that the Borrower fails to so advise the Agent, and if the Borrower fails to reimburse the Issuing Bank for a demand for payment under a Letter of Credit by the date of such payment, the Agent shall give each Bank prompt notice of the amount of the demand for payment, specifying such Bank's Revolving Loan Commitment Percentage of the amount of the related demand for payment, and the Borrower shall be deemed in default hereunder for breaching Subparagraph 2.9(C) above. (E) Each Bank (other than the Issuing Bank) shall pay to the Agent for the account of the Issuing Bank in Dollars and in immediately available funds, the amount of such Bank's Revolving Loan Commitment Percentage of any payment under a Letter of Credit (excluding the Existing Pyron Letter of Credit for which separate provision has been made) upon notice by the Agent to such Bank requesting such payment and specifying such amount as provided in clause (D) of this Paragraph 2.9. Each such Bank's obligation to make such payments to the Agent for the account of the Issuing Bank under this clause (E), and the Issuing Bank's right to receive the same, shall be absolute and unconditional and shall not be affected by any circumstance whatsoever, including (i) the failure of any other Bank to make its payment under this clause (E), the financial condition of the Borrower (or any other account party), the existence of any Default or (ii) the termination of the Commitments. Each such payment to the Issuing Bank shall be made without any offset, abatement, withholding or reduction whatsoever; provided, nothing contained in the foregoing shall limit the Issuing Bank's liability for its gross negligence or willful misconduct in improperly honoring a draft drawn under a Letter of Credit. (F) Upon the making of each payment by a Bank to the Issuing Bank pursuant to clause (E) above in respect of any Letter of Credit, such Bank shall, automatically and without any further action on the part of the Agent, the Issuing Bank or such Bank, acquire (i) a participation in any amount equal to such payment in the Reimbursement Obligation owing to the Issuing Bank by the Borrower and/or Zemex Corporation under this Agreement and under the Letter of Credit Documents relating to such Letter of Credit and (ii) a participation in a percentage equal to such Bank's Revolving Loan Commitment Percentage in any interest or other amounts payable by the Borrower and/or Zemex Corporation under such Letter of Credit Documents and the other Loan Documents in respect of such Reimbursement Obligation (other than the commissions, charges, costs and expenses payable to the Issuing Bank pursuant to clause (G) of this Paragraph 2.9). Upon receipt by the Issuing Bank from or for the account of the Borrower and/or Zemex Corporation of any payment in respect of any Reimbursement Obligation or any such interest or other amount (including by way of set-off or application of proceeds of any collateral security) the Issuing Bank shall promptly pay to the Agent for the account of each Bank who shall have previously assumed a participation in such payment under clause (ii) above, such Bank's Revolving Loan Commitment Percentage of such payment, each such payment by the Issuing Bank to be made in the same money and funds in which received by the Issuing Bank. In the event any payment received by the Issuing Bank and so paid to the Banks is rescinded or must otherwise be returned by the Issuing Bank, each Bank shall, upon the request of the Issuing Bank (through the Agent), repay to the Issuing Bank (through the Agent) the amount of such payment paid to such Bank, with interest at the rate specified in clause (J) of this Paragraph 2.9. <PAGE 7> (G) Borrower shall pay to the Agent for the account of each Bank a letter of credit fee in respect of each Letter of Credit on the daily average undrawn face amount of such Letter of Credit for the period from and including the date of issuance of such Letter of Credit to and including the date such Letter of Credit is drawn in full, expires or is terminated (such fee to be non-refundable, to be paid in arrears on each Quarterly Date and on the Loan Termination Date and to be calculated, for any day, after giving effect to any payments made under such Letter of Credit on such day) in an amount equal to two percent (2.0%) per annum or, for any Quarterly Period prior to the first day of which (and in any event no later than 45 days after the end of the fiscal quarter most recently ended) Zemex Corporation has delivered to the Agent a certificate of Zemex Corporation calculating the Funded Debt to Cash Flow Ratio as at the last day of such fiscal quarter (other than such portion of such period during which a Default shall be continuing), the percentage per annum set forth below opposite the Funded Debt to Capital for Zemex Corporation and its Subsidiaries reflected on such certificate: Funded Debt to Capital Percentage Rate Equal to or Greater than 35% 2.00% per annum Equal to or Greater than 25% and Less Than 35% 1.50% per annum Less than 25% 1.00% per annum Provided, following the occurrence and during the continuation of any Event of Default hereunder, the letter of credit fee shall be that letter of credit fee otherwise due hereunder plus an additional three percent (3%) per annum. All calculations of Letter of Credit fees shall be based on a 360 day year counting the actual number of elapsed days. (H) Upon the request of any Bank from time to time, the Issuing Bank shall deliver any information reasonably requested by such Bank with respect to each Letter of Credit then outstanding. (I) The issuance by the Issuing Bank of each Letter of Credit shall be subject, in addition to the conditions precedent set forth in Paragraphs 3.2 and, if applicable, 3.3, to the conditions precedent that (i) such Letter of Credit shall be in such form, contain such terms and support such transactions as shall be satisfactory to the Issuing Bank consistent with its then current practices and procedures with respect to letters of credit of the same type and if the stated amount of the Letter of Credit exceeds $1,000,000, shall also be in such form, contain such terms and support such transactions as shall be satisfactory to the Majority Banks, and (ii) the Borrower and/or Zemex Corporation shall have executed and delivered such applications, agreements and other instruments relating to such Letter of Credit as the Issuing Bank shall have reasonably requested consistent with its then current practices and procedures with respect to letters of credit of the same type; provided that in the event of any conflict between any such application, agreement or other instrument and the provisions of this Agreement, the provisions of this Agreement shall control. <PAGE 8> (J) To the event that any Bank fails to pay any amount required to be paid pursuant to clause (E) or (F) of this Paragraph 2.9 when due, such Bank shall pay interest to the Issuing Bank (through the Agent) on such amount from and including such due date to but excluding the date such payment is made (i) during the period form and including such due date to but excluding the date three Business Days thereafter, at a rate per annum equal to the Federal Funds Rate (as in effect from time to time) and (ii) thereafter, at a rate per annum equal to the Prime Rate plus 2.0%. (K) The issuance by the Issuing Bank of any modification or supplement to any Letter of Credit shall be subject to the same conditions applicable under this Paragraph 2.9 to the issuance of new Letters of Credit, and no such modification or supplement shall be issued unless either (x) the respective Letter of Credit as affected by such action would have complied with such conditions had it originally been issued in such modified or supplemented form or (y) each Bank shall have consented to such modification or supplement. (L) The obligations of the Borrower and/or Zemex Corporation under this Paragraph 2.9 shall be unconditional and absolute and shall not be affected, modified or impaired, upon the happening at any time or from time to time of any event, including any of the following, whether or not with notice to or the consent of the Borrower and/or Zemex Corporation: 1. the compromise, settlement, release, modification, amendment (whether material or otherwise) or termination of any or all of the obligations, conditions covenants or agreements of any Person in respect of any of the Loan Documents; 2. the occurrence, or the failure by the Agent, any Bank or any other Person to give notice to the Borrower and/or Zemex Corporation of the occurrence, of any Event of Default or any default under any of the other Loan Documents; 3. any failure, omission or delay on the part of the Agent, any Bank, the Borrower, Zemex Corporation or the beneficiary of any Letter of Credit to enforce, assert or exercise any right, remedy, power or privilege conferred by this Agreement or any of the Loan Documents, or any other act or acts on the part of the Agent, any Bank, the Borrower, Zemex Corporation or the beneficiary of any Letter of Credit; 4. the voluntary or involuntary liquidation, dissolution, sale or other disposition of all or substantially all the assets of, the marshalling of assets and liabilities, receivership, insolvency, bankruptcy, assignment for the benefit of creditors, reorganization, arrangement, composition with creditors or readjustment of, or other similar proceedings which affect, the Borrower, Zemex Corporation or any other party to any of the Loan Documents; <PAGE 9> 5. any lack of validity or enforceability of this Agreement, any Letter of Credit or any other Loan Document, or any allegation of invalidity or unenforceability or any contest of such validity or enforceability; 6. the existence of any claim, set- off, defense or other right which the Borrower and/or Zemex Corporation may have at any time against the Agent, any Bank or any beneficiary or any transferee of any Letter of Credit (or any persons or entities for whom the Bank or any such beneficiary or transferee may be acting), or any other Person, whether in connection with this Agreement or any of the other Loan Documents or any of the transactions contemplated by any Loan Document or any unrelated transaction; 7. any statement in any certificate or any other document presented under any Letter of Credit proving to be forged, fraudulent, invalid or insufficient in any respect or any such statement being untrue or inaccurate in any respect whatsoever; 8. payment by the Issuing Bank under any Letter of Credit against presentation of a demand or certificate which does not comply with the terms of such Letter of Credit; 9. the release or discharge by operation of law of the Borrower and/or Zemex Corporation form the performance or observance of any obligation, covenant or agreement contained in any of the Loan Documents; or 10. any other circumstance or happening whatsoever, whether or not similar to any of the foregoing. (M) Without affecting the Borrower's liability under Paragraph 10.7, the Borrower agrees to indemnify each of the Issuing Bank, the Agent and the Banks and their respective affiliates, directors, officers, employees, attorneys and agents from, and hold each of them harmless against, any and all losses, liabilities, damages or expenses incurred by any of them in connection with or by reason of any actual or threatened investigation, litigation or other proceeding (including, in respect of the Issuing Bank and the Agent, any such investigations, litigation or other proceeding between the Issuing Bank or the Agent and any Bank) relating to (a) the execution and delivery of any Letter of Credit; (b) the use of the proceeds of any drawing under any Letter of Credit; or (c) the transfer or substitution of, or payment or failure to pay under, any Letter of Credit, including the reasonable fees and disbursements of counsel incurred in connection with any such investigation, litigation or other proceeding, but excluding damages, losses, liabilities or expenses to the extent, but only to the extent, incurred by reason of (x) the willful misconduct or gross negligence of the Issuing Bank in determining whether a document presented under any Letter of Credit complies with the terms of such Letter of Credit or (y) in the case of the Issuing Bank, such Bank's failure to pay under any Letter of Credit after presentation to it of documents strictly complying with the terms and condition of such Letter of Credit. It shall not be a condition to any such indemnification that the Issuing Bank, the Agent or any Bank shall be a party to any such investigations, litigation or other proceeding. Nothing in this Paragraph 2.9 is intended to limit the Borrower's or Zemex Corporation's payment obligations under this Agreement. (N) The Borrower assumes all risks of the acts or omissions of any beneficiary of any Letter of Credit with respect to the use of the Letter of Credit. None of the Agent, any Bank nor any of their respective affiliates, officers, directors, employees, attorneys or agents shall be liable or responsible for: (a) the use which may be made of the Letter of Credit or for any acts or omissions of any beneficiary of any Letter of Credit in connection with such Letter of Credit; (b) the validity, sufficiency or genuineness of documents presented to the Issuing Bank, or of any endorsement on such documents, even if such documents should in fact prove to be in any or all respects invalid, insufficient, fraudulent or forged; (c) payment by the Issuing Bank against presentation of documents which do not comply with the terms of any Letter of Credit, including failure of any documents to bear any reference or adequate reference to such Letter of Credit; or (d) any other circumstances whatsoever in making or failure to make payment under any Letter of Credit; provided that the Borrower shall have a claim against the Issuing Bank to the extent, but only to the extent, of any direct, as opposed to consequential, damages suffered by the Borrower which the Borrower proves were caused by (i) the Issuing Bank's willful misconduct or gross negligence in determining whether a document presented under any Letter of Credit complies with the terms of such Letter of Credit or (ii) the Issuing Bank's willful failure to pay under the Letter of Credit after presentation to it of documents strictly complying with the terms and conditions of such Letter of Credit. In furtherance and not in limitation of the foregoing, the Issuing Bank may accept documents that appear on their face to be in order, without responsibility for further investigation, regardless of any notice or information to the contrary. <PAGE 10> 2.7. Section III of the Agreement is hereby amended to renumber Paragraph 3.3 as Paragraph 3.4, and to insert a new Paragraph 3.3 as follows: "3.3 Alumitech Plant Advances. As an express condition precedent to the disbursement of any Revolving Loans and/or the issuance of any Letter of Credit in connection with the development and/or construction of any new plant by or for Alumitech, Inc. or any Subsidiary thereof, the Agent and Banks shall be granted either: (A) if the new plant is to be owned one hundred percent (100%) by Zemex Corporation, Alumitech, Inc., or any Subsidiary thereof, a first lien mortgage and security interest in all real property, personal property, and machinery and equipment associated with the new plant and facility, in form and substance satisfactory to the Banks; or (B) if the new plant is to be owned in a joint venture or partnership with a Person who is not an Affiliate of Zemex Corporation, then a first lien security interest in the partnership or joint venture interest owned by Zemex Corporation or one of its Subsidiaries in form and substance satisfactory to the Banks, including such written consents from the other joint venture or partnership party as the Banks may require in their discretion; provided, prior to the issuance of any Letter of Credit to support the financing of such a plant, the Banks must also approve in their discretion the terms and conditions of any underlying financing which the Letter of Credit is intended to enhance; and provided further, prior to the issuance of any Letter of Credit or the advancement of any Revolving Loans, the Banks must also approve the construction budget, the draw request procedure, the contractor and architect, and such other matters as are typically reviewed and/or approved by Banks in initiating and administering a construction loan. 2.8. Each of Alumitech, Inc., a Delaware corporation, Engineered Thermal Systems, Inc., an Ohio corporation, Aluminum Waste Technology, Inc., a Delaware corporation, AWT Properties, Inc., an Ohio corporation, and Zemex Industrial Minerals, Inc., a Delaware corporation, hereby grants and ratifies and confirms the grant of the security interest by it contained in Paragraphs 4.2 and 4.4 of the Agreement as security for the prompt satisfaction of all Obligations and all Guaranties of the Obligations, including without limitation the Guaranties required to be executed by each of them pursuant to Paragraph 4.1(e) below. <PAGE 11> 2.9. Paragraph 6.17 is hereby amended to replace the figure of 0.40 in Subparagraph (B) with the figure of 0.45, to replace the ratio of 3.0 to 1.0 in Subparagraph (C) with the ratio of 3.50 to 1.0, and to replace the ratio of 1.35 to 1.0 in Subparagraph (D) with the ratio of 1.25 to 1.00. 2.10. Subparagraph 7.2(B) is hereby amended to insert the words "Existing Pyron" before the term "Letter of Credit Facility" where it appears therein. 2.11. Paragraph 7.9 is hereby amended in subparagraph (iii) thereof to insert "Existing Pyron" before the term "Letter of Credit Reimbursement Agreement." 2.12. Paragraph 7.16(F) is hereby amended to delete the clause "and a Participating Subsidiary" and to replace it with the clause "and be considered by the Banks for inclusion as a Participating Subsidiary". 2.13. Paragraph 7.17 is hereby amended to delete everything after "Five Million Dollars ($5,000,000.00)" and to insert instead the clause "in any fiscal year." 2.14. Paragraph 8.1 is hereby amended in subparagraph (M) to insert the words "Existing Pyron" in front of the terms "Letter of Credit Facility" and "Letter of Credit Reimbursement Agreement." In addition, a new subparagraph (P) is hereby added thereto as follows: "(P) A breach or default shall occur under any Letter of Credit Document." 2.15. Paragraph 9.9 is hereby amended to delete the first sentence thereof in its entirety and to replace it with the following: "Except as may be provided in other sections of this Agreement, including Paragraphs 2.14(B) and 7.2, all of the funds received by Banks, or any of them, with the exception of funds received by The Chase Manhattan Bank with respect to the Existing Pyron Letter of Credit Reimbursement Agreement shall be allocated pro rata among all Banks in proportion to their respective outstanding Loan balances and Reimbursement Obligations, if any; provided, following the occurrence of an Event of Default and the acceleration of the Obligations, all funds received by the Banks thereafter shall, unless the Banks otherwise agree, be allocated in proportion to the sum of their respective outstanding Loan balances, Letter of Credit Liabilities, and Existing Pyron Letter of Credit Liabilities." <PAGE 12> 2.16. Paragraph 9.11 is hereby amended to delete the clause in the first sentence "in proportion to the Letter of Credit Liabilities and the respective outstanding Loan amounts" and to replace it with the clause "in proportion to the Letter of Credit Liabilities, the Existing Pyron Letter of Credit Liabilities and the respective outstanding Loan amounts." 2.17. Exhibit N to the Agreement is hereby supplemented by adding thereto the additional environmental disclosures contained in Exhibit N-1 attached hereto and incorporated herein by reference. The Borrower and its Participating Subsidiaries hereby warrant that, except as may be disclosed on Exhibit N-1, the respective assets and operations of Alumitech, Inc., Engineered Thermal Systems, Inc., Aluminum Waste Technology, Inc., AWT Properties, Inc. and Zemex Industrial Minerals, Inc. are in compliance in all material respects with all Environmental Laws and are in a clean and healthful condition, free of asbestos and of all contamination by Hazardous Materials and other potentially harmful chemical or physical conditions; all storage tanks (whether above or below ground) located in or on such plants, facilities and properties are in sound condition, free of corrosion or leaks that could allow or threaten the release of any stored material; and no Hazardous Materials are or to the best of Borrower's knowledge, have been used, stored, treated or disposed of in violation of applicable Laws and regulations. No Borrower or Participating Subsidiary is a defendant in any administrative or judicial actions alleging liability under CERCLA with respect to such properties and assets, nor has any Borrower or Participating Subsidiary received a notice that it is a potentially responsible party under CERCLA or other similar state Laws. 2.18. The Agreement is hereby modified to replace Chemical Bank wherever such name appears with The Chase Manhattan Bank. 3. Representations and Warranties. To induce the Banks and the Agent to enter into this Amendment No. 1, Borrower and Guarantors jointly and severally represent and warrant to the Banks and the Agent as follows: 3.1. Incorporation. Alumitech, Inc., Aluminum Waste Technology, Inc. and Zemex Industrial Minerals, Inc. are corporations duly organized, validly existing and in good standing under the laws of the State of Delaware, and Engineered Thermal Systems, Inc. and AWT Properties, Inc. are corporations duly organized, validly existing and in good standing under the laws of the State of Ohio; each of said corporations has the lawful power to own its properties and to engage in the business it conducts, and each is duly qualified and in good standing as a foreign corporation in the jurisdictions wherein the nature of the business transacted by it or property owned by it is both material and makes qualification necessary; Zemex Industrial Minerals, Inc. has its chief executive office and principal place of business in Atlanta, Georgia and each of the other corporations has its chief executive office and principal place of business located at Streetsboro, Portage County, Ohio; each of Alumitech, Inc., Aluminum Waste Technology, Inc., Engineered Thermal Systems, Inc., and AWT Properties, Inc. has its equipment and inventory located in the State of Ohio and Zemex Industrial Minerals, Inc. has all of its inventory and equipment located in Atlanta, Georgia. <PAGE 13> 3.2. Due Authorization, No Conflicts, Etc. The execution, delivery and performance by the Borrower and Guarantors of this Amendment No. 1 and any and all other agreements, instruments and documents to be executed and/or delivered by the Borrower or any Guarantor pursuant hereto or in connection herewith, and the consummation by Borrower and Guarantors of the transactions con templated hereby or thereby: (a) are within the corporate powers of each; (b) have been duly authorized by all necessary corporate action, including without limitation, the consent of stockholders where required; (c) do not and will not (i) contravene the respective certificate of incorporation or by-laws or other comparable governing documents of Borrower or any Guarantor, (ii) violate any Laws, or any order or decree of any court or governmental authority, or (iii) conflict with or result in the breach of, or constitute a default under, or result in the termi nation of, any material contractual obligation of Borrower or any Guarantor, and (d) do not require the consent, authorization by, or approval of, or notice to, or filing or registration with, any governmental authority or any other Person other than those which have been obtained and copies of which have been delivered to the Agent pursuant to Subsection 4.1(a)(ii) hereof, each of which is in full force and effect. 3.3. Due Execution, Etc. This Amendment No. 1 and each of the other agreements, instruments and documents to be executed and/or delivered by Borrower or any Guarantor pursuant hereto or in connection herewith (a) has been duly executed and delivered, and (b) constitutes the legal, valid and binding obligation of each, enforceable against it in accordance with its terms, subject however to state and federal bankruptcy, insolvency, reorganization and other laws and general principles of equity affecting enforcement of the rights of creditors generally. <PAGE 14> 3.4. Real Property. The Borrower and its Participating Subsidiaries have good and marketable title to the Real Property subject to no encumbrances other than Permitted Liens and those noted in the Deeds of Trust originally executed and delivered on March 15, 1995. 4. Conditions Precedent. The effectiveness of this Amendment No. 1 is subject to the fulfillment of the following conditions precedent on or prior to the Amendment No. 1 Effective Date (as hereinafter defined in Section 5 hereof): 4.1. Conditions Precedent to Effectiveness of Amendment No. 1. The Agent shall have received, on or prior to the Amendment No. 1 Effective Date, the following, each dated on or prior to the Amendment No. 1 Effective Date unless otherwise indicated, in form and substance satisfactory to the Agent and in sufficient copies for each Bank: (a) Certified copies of (i) the resolutions of the Board of Directors of Borrower and each Guarantor approving this Amendment No. 1 and each other agreement, instrument or document to be executed by them pursuant hereto or as contemplated hereby, and (ii) all documents evidencing other necessary corporate action and required governmental and third party approvals, licenses and consents with respect to this Amendment No. 1 and the transactions contemplated hereby. (b) A certificate of the Secretary or an Assistant Secretary of Borrower and each Guarantor certifying the names and true signatures of the officers of Borrower and each Guarantor who have been authorized to execute on behalf of Borrower and such Guarantor this Amendment No. 1 and any other agreement, instrument or document executed or to be executed by Borrower and any Guarantor in connection herewith. (c) A certificate dated the Amendment No. 1 Effective Date signed by the President or any Vice-President of Borrower, to the following effect: <PAGE 15> (i) The representations and warranties of the Borrower contained in Sections 3.1, 3.2 and 3.3 of this Amendment No. 1 are true and correct on and as of such date as though made on and as of such date; (ii) No Default or Event of Default has occurred and is continuing, and no Default or Event of Default would result from the execution and delivery of this Amendment No. 1 or the other agreements, instruments and documents contemplated hereby; and (iii) The Borrower has paid or agreed to pay all amounts payable by it pursuant to the Agreement as amended hereby (including, without limitation, all legal fees and expenses of Banks' counsel incurred in connection herewith) to the extent then due and payable. (d) Two (2) original Revolving Notes duly executed by Zemex Corporation and The Feldspar Corporation, jointly and severally, in the amount of $15,000,000 each, evidencing the renewal, modification and increase of the existing Revolving Notes, in the form attached hereto as Exhibit A-1. (e) An original Guaranty and Suretyship Agreement duly executed by each of Alumitech, Inc., a Delaware corporation, Engineered Thermal Systems, Inc., an Ohio corporation, Aluminum Waste Technology, Inc., a Delaware corporation, and AWT Properties, Inc., an Ohio corporation, and Zemex Industrial Minerals, Inc., a Delaware corporation, in the form attached hereto as Exhibit B, together with Amended and Restated Guaranty and Suretyship Agreements executed by Pyron Corporation, Pyron Metal Powders, Inc., Suzorite Mineral Products, Inc. and Suzorite Mica Products, Inc. Les Produits Mica Suzorite, Inc. (f) Such UCC financing statements as may be required by the Banks, showing Alumitech, Inc., Engineered Thermal Systems, Inc., Aluminum Waste Technology, Inc., AWT Properties, Inc., and Zemex Industrial Minerals, Inc. as the debtors therein. <PAHE 16> (g) An original Amendment No. 1 to Stock Pledge Agreement duly executed by Zemex Corporation in the form attached hereto as Exhibit C, and Stock Pledge Agreements in the form attached hereto as Exhibit D, duly executed by each of Alumitech, Inc. and AWT Properties, Inc. (h) A favorable opinion of Messrs. Davis, Graham & Stubbs, L.L.P., counsel to the Borrower, in substantially the form of Exhibit E hereto, and as to such other matters as any Bank, through the Agent, may reasonably request. (i) A favorable opinion of Messrs. Smith Lyons, special Canadian counsel, in substantially the form of Exhibit F hereto. (j) Duly executed Amended and Restated Environmental Indemnity Agreement of the Borrower and the Guarantors with respect to all real property owned or leased by any of them. (k) Duly executed First Amendment to the North Carolina Commercial Deed of Trust and Security Agreement for Securing Revolving Line of Credit and Other Indebtedness and the recordation of same in the Register of Deeds for Mitchell County, North Carolina together with the receipt by the Agent of an endorsement to the Lawyers Title Insurance Corporation Mortgagee Loan Policy #135-00-780-653 reflecting the recordation of said First Amendment and bringing forward the effective date of the Mortgagee Title Insurance Policy without any other change or modification. (l) Duly executed First Amendment to the Jasper County, Georgia Commercial Deed to Secure Debt and Security Agreement and the recordation of same in the Clerk's Office of the Superior Court for Jasper County, Georgia. (m) Duly executed First Amendment to the Greene County, Georgia Commercial Deed to Secure Debt and Security Agreement and the recordation of same in the Clerk's Office for the Superior Court for Greene County, Georgia. 5. Effectiveness of Amendment No. 1. This Amendment No. 1 and the Exhibits attached hereto shall become effective at such time as (a) each of the conditions precedent set forth in Section 4.1 hereof shall have been satisfied, and (b) counterparts of this Amendment No. 1, executed and delivered by the Borrowers, the Banks and the Agent shall have been received by the Agent (or, alternatively, confirmation of the execution hereof by such parties shall have been received by the Agent). The date upon which the conditions described in clauses (a) and (b) of the foregoing sentence shall have been fulfilled is referred to herein as the "Amendment No. 1 Effective Date". <PAGE 17> 6. Closing. The Closing under this Amendment No. 1 shall occur on the Amendment Effective Date at the offices of Boult, Cummings, Conners & Berry, 1 NationsBank Plaza, Nashville, Tennessee 37219, or such other location as the parties may agree. 7. Post Closing Deliveries. The Borrower covenants to deliver to the Agent on behalf of the Banks: (a) on or before March 27, 1997, terminations of all UCC statements filed by Ohio Savings Bank and ORIX Credit Alliance, Inc. against any of the Subsidiaries of Alumitech, Inc., including without limitation AWT Properties, Inc., together with such other evidence as the Banks may request showing that the outstanding indebtedness to Ohio Savings Bank and ORIX Credit Alliance, Inc. has been paid in full, and (b) on or before May 12, 1997, a fully executed Collateral Mortgage Modification Agreement substantially in the form attached hereto as Exhibit G amending the Collateral Mortgage and Security Agreement from Pyron Corporation and the Niagara County Industrial Development Agency to NationsBank of Tennessee, N.A. as Agent for itself and the Chase Manhattan Bank (formerly Chemical Bank) dated March 15, 1995 and recorded in the Clerk's Office for Niagara County, New York in Liber 3047, page 178, together with evidence of the approval of said Modification by the Niagara County Industrial Development Agency and an endorsement to the Ticor Title Mortgagee Policy of Title Insurance No. 5295-25021 bringing forward its effective date to the date of the recordation of the Collateral Mortgage Modification Agreement without showing any other changes to title. Borrower's failure to comply herewith shall constitute an Event of Default. 8. Governing Law, Etc. This Amendment No. 1 shall be governed by, and construed in accordance with, the laws of the State of Tennessee as provided in Section 10.9 of the Agreement, which Section is incorporated herein by reference and made a part hereof as though set forth in full herein. 9. Section Titles and Table of Contents. The Section Titles and Table of Contents contained in this Amendment No. 1 are and shall be without substantive meaning or content of any kind whatsoever and are not a part of the agreement among the parties hereto. <PAGE 18> 10. Waiver of Jury Trial. EACH PARTY HERETO, INCLUDING THE BORROWER, EACH SUBSIDIARY, THE BANKS, AND THE AGENT, HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE (TO THE EXTENT PERMITTED BY APPLICABLE LAWS) ANY RIGHTS THEY MAY HAVE TO A TRIAL BY JURY OF ANY DISPUTE ARISING UNDER, RELATING TO, OR CONNECTED WITH THIS AGREEMENT, THE COLLATERAL OR ANY OTHER AGREEMENT, INSTRUMENT OR DOCUMENT CONTEMPLATED HEREBY OR DELIVERED IN CONNECTION HEREWITH AND AGREE THAT ANY SUCH DISPUTE SHALL BE TRIED BEFORE A JUDGE SITTING WITHOUT A JURY. THIS PROVISION IS A MATERIAL INDUCEMENT FOR THE BANKS' AND THE AGENT ENTERING INTO THIS AGREEMENT. 11. Counterparts. This Amendment No. 1 may be executed in any number of counterparts and by different parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same instrument. 12. Agreement to Remain in Effect. Except as expressly provided herein, the Agreement and each other Collateral Document shall be and shall continue in full force and effect in accordance with its respective terms. IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 1 to be executed by their respective officers thereunto duly authorized, as of the date first above written. AGENT BORROWER NATIONSBANK OF TENNESSEE, N.A., ZEMEX CORPORATION as Agent BY: BY: TITLE: TITLE: BY: TITLE: <PAGE 19> BANKS NATIONSBANK OF TENNESSEE, N.A. THE FELDSPAR CORPORATION BY: BY: TITLE: TITLE: THE CHASE MANHATTAN BANK GUARANTORS AND PARTICIPATING (formerly Chemical Bank) SUBSIDIARIES PYRON CORPORATION BY: TITLE: BY: TITLE: PYRON METAL POWDERS, INC. BY: TITLE: SUZORITE MICA PRODUCTS INC. LES PRODUITS MICA SUZORITE INC. BY: TITLE: SUZORITE MINERAL PRODUCTS, INC. BY: TITLE: <PAGE 20> ALUMITECH, INC. BY: TITLE: ENGINEERED THERMAL SYSTEMS,INC. BY: TITLE: ALUMINUM WASTE TECHNOLOGY, INC. BY: TITLE: AWT PROPERTIES, INC. BY: TITLE: ZEMEX INDUSTRIAL MINERALS, INC. BY: TITLE: