FIELD: ferrous and precious metallurgy, in particular, processes for extraction of precious metals from affinage production wastes.
SUBSTANCE: method involves leaching out material containing precious metals and lead with the use of sulfuric acid solution having concentration of 150-300 g/l; subjecting sulfuric acid leaching cake to leaching out in sodium chloride solution without addition of sulfuric acid. Method allows lead to be more completely extracted from processing circuit.
EFFECT: provision for producing of stable lead-containing solutions, and improved quality of platinum metal concentrates.
1 tbl, 7 ex
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