FIELD: metallurgy.
SUBSTANCE: claimed process comprises film grinding, processing of ground film in structure breaking solution containing pancreatin, separation of the film, solution and silver-bearing precipitate. Note here that said structure breaking solution contains extra 0.1-1 g/l of the salt of oxy-ethyl or oxy-butyl ether of dithiocarbonic acid. Duration of the film processing in structure breaking solution makes 5-10 min while separation of silver-bearing precipitate from structure breaking solution is performed by flotation.
EFFECT: higher rate and degree of extraction.