Original Article
Baimbetov BS, Aitenov KD, Beki
Abstract
Polymetallic sulphide concentrates obtained by bulk flotation of ores. Removing the collective concentrate all valuable components (Cu, Zn, Pb, and others). 10-15% higher compared with the recovery in a selective concentrate, reduced scheme of enrichment and processing costs repartition. Collective concentrate of heavy nonferrous metals typically comprises: Cu2S- chalcocite, CuS- cove lite, CuFeS2- chalcopyrite, sphalerite and wurtzite ZnS, pBS-galena, FeS2 - pyrite, Fe2O3-Fe3O4-FeO - iron oxides, SiO2- quartz, silica, Al2O3 - alumina, CaCO3-MgCO3- carbonates, as well as precious and rare metals. For the processing of sulphide concentrates and middling can use regenerable process reagent - soda ash Na2CO3. From a thermodynamic analysis of the reactions for HSC Chemistry Program1 revealed that the most favorable scheme to form a metal oxide and with the binding of sulfur to sodium sulfate and release of carbon dioxide: