关键词: 滑石, 高硫铜矿, 铜硅混浮, 抑制后重选, 综合回收

Abstract: A certain high-sulfur copper ore in Guangxi contains high content of easy floating siliceous mineral，such as talc. The process of low intensity magnetic separation-copper floating-sulfur floating is carried out on the field. There，except for pyrrhotite well recovered by weak magnetic separation，it is difficult to obtain the qualified concentrate from flotation of chalcopyrite and pyrite due to the interference of silica minerals. Based on a large number of tests，the process of low intensity magnetic separation-mixing flotation of chalcopyrite and siliceous minerals-shaking table separation for mixing flotation of silicon and copper concentrate - mixing flotation of pyrite from tailings is adopted to treat this ore. By this way，sulfur concentrate with S grade and recovery of 38.69% and 64.48% by magnetic separation，and 44.57% and 30.99% by flotation，and copper concentrate with Cu grade and recovery of 13.87% and 63.89% are realized respectively. So the copper and sulfur minerals can be effectively recovered.

Key words: Talc, High-sulfur copper ore, Mixing floatation of copper and silicon, Gravity separation after inhibition, Comprehensive recovery