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Nowadays study on recovery valuable metals from discarded electronic wastes has great significance for achieving secondary resources recycling and preventing environmental pollution. For separating and recycling Ag from Ag-Cu composite materials, some experiments have completed by using Ag-Cu composite material scraps, and the effect of leaching time, temperature and nitric-sulfuric mixed acid volume...
Recovering zinc and silver from zinc acid-leaching residue was investigated in this study. The process of sulphation roasting, water leaching, silver chlorination leaching, PbCl2 crystallization and lead replacement was used. The leaching rate of zinc and iron is 92.66% and 94.67% when sulphation roasting temperature is 300 °C, sulphate consumption is 70∼84 g Hectogram material, time is 120 min. Leach...
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