Abstract
Abstract Richardson, H. Wayne (Phibro‐Tech, Inc.). The methods of recycle for various nonferrous metals of economic importance are detailed. Principal metals are aluminum, copper, lead, and zinc, although cobalt, nickel, tin, and precious metals such as gold, silver, and palladium are also recycled. Types and sources of scrap and waste metal are given. Much recyclable material arises from discarded automobile parts, beverage cans, and industrial metal industry wastes. Factors that influence the decision to recycle by pyrometallurgical or hydrometallurgical means are discussed. These processes are described, including the types of furnaces employed for smelting operations and the extractants used for solvent extraction systems. Recycling of nonferrous metals is heavily dependent on the economics of using secondary metal feed rather than ore. The role of waste management is also considered. Vol. 20, pp. 1106–1126, 31 refs. to August 1995.
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