A process involving the extraction of copper, nickel and cobalt from smelting slag in nonferrous metal metallurgy and the production of pure chemicals of corresponding metallic salts is presented in this paper. The slag is leached with sulfuric acid and chloride solutions, resulting in leach solutions with high contents of valuable metals and several impurities. The purification and enrichment of the valuable metals are achieved by a series of processes, consisting of copper extraction from the leach solution with Acorga M5640, purification with P204 (D2EHPA) and nickel and cobalt separation with P507 (PC88A). The control of technological parameters and equipment arrangement in solvent extraction are emphasized in the paper. Finally, the production of copper, nickel and cobalt sulphate and the resulting product quality is briefly described.
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