METHOD OF PROCESSING OF FEED STOCK CONTAINING PRECIOUS METALS AND SULPHIDES Russian patent published in 2015 - IPC C22B11/00 C22B3/08 

FIELD: metallurgy.

SUBSTANCE: invention relates to hydraulic metallurgy of the precious metals in particular to processing of the aurum sulphide feed stock not containing organic carbon substance. Method of processing of the feed stock containing the precious metals and sulphides includes feed stock missing with water or sulphuric acid solution, and mixture treatment in autoclave with oxygen supply. Then sulphuric acid is separated from the oxidated pulp by washing with water. At that halogenide-ion is additionally injected to mixture supplied for autoclave treatment. Ions of chlorine, iodine and bromine are used as halogenide-ions, they are injected in form of the soluble salts or containing them natural minerals of carnallite (MgCl₂·KCl·6H₂O), or treated electrolytes of alkali and alkali-earth metals electrolysis.

EFFECT: increased recovery of the precious metals and reduced expenses for treatment of the strong feed stock due to alkali treatment exclusion.

9 cl, 1 dwg, 3 tbl, 1 ex