METHOD FOR PROCESSING MATERIALS CONTAINING PRECIOUS METALS AND IRON Russian patent published in 2021 - IPC C22B11/00 C22B7/00 C22B3/06 C22B3/46 

FIELD: metallurgy of non-ferrous metals.

SUBSTANCE: invention relates to the metallurgy of non-ferrous metals, in particular to the processing of technogenic raw materials for the production of noble metals, and can be used to concentrate noble metals from the products of production, namely from the precipitation of palladium refining. The method of processing includes pulping materials containing noble metals and iron, leaching them in an acidic solution with the addition of an oxidizing agent until the redox potential value of 650-850 mV relative to the silver chloride reference electrode is reached and reductive deposition until the value of the redox potential is no more than 600 mV relative to silver chloride reference electrode for gold deposition.

EFFECT: method makes it possible to process materials containing noble metals and iron, with the formation of selective concentrates of noble metals, suitable for further processing according to known technologies.

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