FIELD: mining.
SUBSTANCE: method of precious metals extracting from anode slime produced with electrolysis of copper includes: (a) leaching the anode slime in the sulfuric acid aqueous solution to remove the leachable chlorides and with obtaining of a first leach residue depleted of chlorides. Further performing (b) the first leaching residue leaching under pressure to dissolve Ag and Se and to produce the first filtrate containing Ag and Se and a second leaching residue depleted of Ag and Se. Further conducting (c) the second leach residue leaching with the hydrochloric acid aqueous solution to dissolve Au and platinum group metals (PGM) with production of a second filtrate containing Au and PGM and a final leaching residue.
EFFECT: technical result is simplification of the process and reduction of emissions to the environment due to elimination of the slurries melting.
15 cl, 1 dwg, 2 ex
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