Aluminum Company of America

Aluminum Waste Technology, Inc.

Daniel Yerushalmi

Jan H Van Linden

Gerald E Carkin

Donald L Stewart, Jr

Leonard Sarko

An improved method for processing aluminum dross containing fluxing salt to provide a fired inorganic or ceramic product wherein said dross is processed to remove fluxing salts therefrom, and wherein a non-metallic product is recovered. The improved process comprises providing a body of the non-metallic product in an aqueous slurry, a major portion of the body comprised of Al.sub.2 O.sub.3 and minor portions of said body comprised of SiO.sub.2 and MgO. The composition of the slurry is adjusted by adding one of Al.sub.2 O.sub.3 and SiO.sub.2 in an amount sufficient to form the fired inorganic product on heating. The slurry is heated to a temperature sufficiently high to fire the slurry and produce the fired inorganic product.

Method of recycling aluminum dross

A process for the recovery of metallic aluminum, mixtures of salts, and an aluminum oxide-metallic aluminum product from secondary aluminum dross. The process includes treating the dross with leach water to dissolve the salt content. Magnesium chloride is preferably added to the leach water to maintain the pH in the range of about 7-8.5, thereby reducing ammonia production in the treating step and enhancing recovery of metallic aluminum.

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Cleveland, OH, United States of America

Daniel Yerushalmi