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In the view points of resource recycling and environment protection it is necessary to extract the valuable metals from waste electric and electronic scraps (WEES) which contain considerable amounts of valuable metals such as copper, tin, gold, and silver. In present work, a novel process to extract valuable metals such as copper and tin from WEES by smelting with the addition of waste copper slag as a slag formative has been developed. The process uses only waste copper slag without using any additional flux components as slag formatives. In each set of experiment, crushed WEES were melted with waste copper slag for 30 min at 1623 K in air atmosphere. Based on proposed process flow-sheet, up to 90% of copper and 80% of tin contained in the raw materials were extracted as a Cu-Fe-Sn alloy phase at the input ratio of 50 : 50 of WEES and waste copper slag. [doi:10.2320/matertrans.M2009062]

A High Temperature Process for Extracting Valuable Metals from Waste Electric and Electronic Scraps (WEES)