FIELD: hydrometallurgy of nonferrous metals.
SUBSTANCE: method of recovering silver or silver compounds directly from silver-containing flotation sulfide concentrates comprises leaching concentrates with sulfuric acid thiourea solution containing 5-20 g/l sulfuric acid and 60-100 g/l thiourea in presence of oxidant, in particular oxygen, preferably air oxygen. Leaching is conducted at 50-90оС first without oxidant until collector destruction process is ended (used for preparation of concentrate) and then with oxidant.
EFFECT: maximized recovery of silver into solution.
8 cl, 1 tbl, 2 ex
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