METHOD FOR HYDROMETALLURGICAL PROCESSING OF ANTIMONIC GOLD-CONTAINING CONCENTRATES Russian patent published in 2021 - IPC C22B3/12 C22B11/00 C22B30/02 

FIELD: hydrometallurgy.

SUBSTANCE: invention relates to the hydrometallurgy of non-ferrous metals for the processing of sulfide antimony gold-containing concentrates. The method includes sulfide-alkaline leaching of the concentrate, which is carried out in two stages in a countercurrent mode. The first stage of leaching is carried out with a lack of 40-90% in the Na2S solution of the stoichiometrically necessary amount for antimony leaching, to obtain a first stage solution and a first stage cake. From the obtained solution of the first stage, gold is precipitated by cementation with metallic zinc to obtain a de-gold solution, which is sent to the electric extraction of antimony. The second stage is carried out by leaching the cake obtained at the first stage of leaching with spent electrolyte after electroextraction of antimony with an excess of Na2S of 100-130% of the stoichiometrically necessary for complete leaching of antimony to obtain a cake of the second stage and a solution of the second stage, which is used in the first stage of leaching.

EFFECT: method provides high extraction of antimony into solution and at the same time allows concentrating over 99% of gold in the solid residue.

3 cl, 1 dwg, 2 tbl