FIELD: metallurgy.
SUBSTANCE: disclosed method consists in oxidizing autoclave leaching at 160-200°C temperature in sulphuric acid medium under oxygen pressure, in neutralisation of excessive acid with neutralising agent; in hydro-thermal treatment of neutralised pulp in autoclave at 160-200°C temperature, in separation of sediment from solution and in forming rich copper concentrate containing noble metals and zinc solution. Also excessive acid is neutralised from liquid phase of pulp of oxidizing autoclave leaching preliminary separated from solid phase; and waste gypsum cake is separated. Solution separated from cake is mixed with solid phase of pulp of oxidising autoclave leaching; neutralised pulp is produced. This pulp is directed to hydro-thermal treatment.
EFFECT: increased extraction of noble metals, reduced time of treatment.
2 cl, 1 tbl
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