METHOD OF PRODUCTION OF CATHODE COPPER OUT OF SULPIDE OXIDISED COPPER ORES Russian patent published in 2008 - IPC C22B15/00 C22B3/08 

FIELD: metallurgy.

SUBSTANCE: invention refers to copper metallurgy, particularly to methods of processing of sulphide oxidised copper ores. The method includes dry crumbling and further crushing of ore to the size of not more, than 1.0-4.0 mm, leaching of ore at mixing and contents of the solid phase of 50-70% with solution of sulphuric acid of concentration from 10.0 to 40 g/dcm³. After dehydration and washing out of cake of leaching ore neutralisation and crushing of cake is carried out to the size of 60-95% class - 0.074 mm, further flotation of copper minerals out of leaching cake is performed with production of flotation concentrate. Leaching of flotation concentrate is carried out at mixing in water solution of sulpuric acid of concentration 10-80 g/dcm³ at temperature of 20-55°C with use of ozone and at presence of ions of trivalent iron of concentration from 2.0 to 15 g/dcm³. Then dehydration and washing out of concentrate leaching cake is executed; ore leaching liquid phase is merged with washing out waters of concentrate leaching cake, produced copper containing merged solution is freed from suspended solids and copper is extracted from merged solution with production of cathode copper.

EFFECT: reduction of sulphuric acid consumption for processing, increased extraction of copper out of ore, upgraded quality of commercial products of cathode copper.

8 cl, 2 ex