METHOD FOR COPPER EXTRACTION FROM SULFURIC SOLUTION Russian patent published in 2008 - IPC C22B15/00 C22B3/30 

FIELD: metallurgy.

SUBSTANCE: invention concerns copper hydrometallurgy. Particularly it concerns method for copper extraction received, for instance, ore leaching by means of dense, subterranean and vat method and also from concentrates, dumps, sledges, slugs etc. Method for copper extraction from sulfuric solutions includes extraction at blending of sulfuric solutions with solution of cation-exchange organic selective extractant and further separation of mixture by means of sedimentation with receiving of copper-bearing extract and extraction raffinate. Copper re-extraction from extract is implemented by means of blending extract with solution of sulfuric acid cwith further separation with receiving of copper-bearing extract extractant solution. Then it is implemented cleaning of re-extract by flotation with further filtration or coalescing and electro extraction of copper from clean re-extract with receiving of cathode copper and spent electrolyte. Spent electrolyte is used for copper re-extraction.

EFFECT: decreasing of sulfuric acid consumption, increasing of copper extraction, decreasing of copper losses with spent solutions, improving of cathode copper.

11 cl, 2 ex