TREATMENT METHOD OF ZINC-BEARING GOLDEN-SILVER CYANIC SEDIMENTS Russian patent published in 2009 - IPC C22B11/00 C22B3/06 

FIELD: metallurgy.

SUBSTANCE: invention is related to noble metals metallurgy and can be used for technology of desilverisation and gold extraction from zinc-bearing golden-silver cyanic sediments with increased content of silver. Initial zinc-bearing golden-silver cyanic sediment is leached, at first, in nitric acid solution and then into received pulp excluding filtration it is added caustic soda solution till achieving the concentration NaOH, equal to 100-140 g/l. After it alkaline solution is separated from non-solved sediment. The latter is washed by alkaline solution, dried, molten with fluxes on golden-silver alloy. Received alloy is settled, slag is separated from silver gold-bearing alloy, which is directed to silver refining by means of electrolysis in nitro-acid electrolyte. Electrolysis products are refined cathodic silver and golden sludge, which is refined by well-known methods.

EFFECT: removing of detrimental impurities, essentially, zinc, selenium and tellurium made of initial cyanic sediment.

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