1 EXHIBIT 23 INDEPENDENT AUDITORS' CONSENT We hereby consent to the incorporation by reference in Registration Statements Nos. 333-74803 and 333-75371 of Zemex Corporation on Form S-8 of our report dated February 2, 2001 except as to note 19, which is as of March 20, 2001 appearing in the Annual Report on Form 10-K of Zemex Corporation for the year ended December 31, 2000. /s/ Deloitte & Touche LLP Deloitte & Touche LLP Chartered Accountants Toronto, Canada March 28, 2001