Abstract:A ceramic filter tailing, as iron sulfide minerals with a high content of arsenic, which was generated from separation of copper sulfide mineral from the bulk concentrate of copper and iron sulfide minerals in a plant, Yunnan province. The sample contained 27.32% sulfur and 4.85% arsenic. The sample was also detected by XRD, EPMA and EDS in detail. The results showed that the main sulfide mineral is pyrite, followed by pyrrhotite and arsenopyrite, and the main gangue minerals are dolomite and quartz. According to the properties of high-arsenic iron sulfide minerals, the process of “floating-magnetic combination technology” was adopted and meanwhile, the high efficiency reagent which was dominated by macromolecular organic weak acid salt was used as the depressor of arsenopyrite. A flotation concentrate containing 48.11% S and 0.35% As was obtained and the sulfur recovery reached 42.94%, after adopting the flotation process of “float sulfur and inhibit arsenic”. Then, the flotation tailings were put into a high gradient magnetic separator for a further separation based on the magnetic property of pyrrhotite. A magnetic separation concentrate containing 37.59% S and 0.58% As was obtained and the sulfur recovery reached 25.32%, while a magnetic separation tailing containing 15.66% S and 7.89% As was obtained and the arsenic recovery reached 95.79%. Thus, the efficient separation of S-As components in iron sulfide minerals with a high content of arsenic was achieved.