Research on low-alkalinity beneficiation for a high sulfur copper-zinc ore associated silver-cadmium-indium
A low-alkalinity beneficiation is studied on a high sulfur copper-zinc ore containing 1.13%copper,1.98%zinc,17.85%sulfur,71 g/t silver,90 g/t cadmium and 21 g/t indium,which the main target minerals are chalcopyrite,sphalerite and pyrite.A gravity concentration is carried out.The results show that at the grinding fineness of-0.074 mm 90%,copper flotation operation using CaO+NaS2 to inhibit pyrite,taking ZnSO4+Na2S2O5 as zinc minerals'inhibitors,and zinc flotation operation using C9H8Na2O4+CaO to inhibit pyrite.The copper concentrate with 23.59%of Cu grade and 92.85%of Cu recovery rate,which containing 328 g/t Ag,228 g/t Cd,and 142 g/t In.The zinc concentrate with 45.81%of Zn grade and 80.60%of Zn recovery rate,which containing 796 g/t Ag,2 000 g/t Cd,and 287 g/t In.The shaking table test obtains sulfur concentrate with a sulfur grade of 42.34%and an operational recovery rate of 68.04%.The synergistic effect of pyrite combination inhibitors reduce the CaO dosage,and the flotation pH value drops below 10.The research results lay a good foundation for the industrial development of this ore.
万方数据
维普
