METHOD FOR COPPER EXTRACTION FROM SULFURIC SOLUTIONS, CONTAINING FERROUS IRON IONS Russian patent published in 2008 - IPC C22B15/00 C22B3/26 

FIELD: metallurgy.

SUBSTANCE: invention concerns copper hydrometallurgy by extraction method from sulfuric solutions by organic extractants, and elecro extraction. Particularly from solutions of 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, containing copper ions and ions of ferrous iron includes treatment of solution by oxidant containing active oxygen forms, and copper extraction by 2-3 stages by blending of treated copper-bearing solution with solution of organic cation-exchange extractant. After extraction it is implemented mixture separation by sedimentation with receiving copper-bearing extract and raffinate. Copper re-extraction from extract is implemented by 1-2 stages of extract blending with solution of sulfuric acid or treated electrolyte with further separation of mixture by sedimentation with receiving re-extract and extractant solution. From re-extract it is implemented re-extraction of copper with receiving of cathode copper and spent electrolyte.

EFFECT: reduction of extractant consumption, increasing of copper extraction selectivity, increasing of cathode copper quality.

8 cl, 2 ex