关键词: 含铜硫磁铁矿石, 干式磁选抛尾, 先浮后磁, 先磁后浮, 阶段磨选

Abstract: The major iron mineral of a iron ore is magnetite and associated with a spot of chalcopyrite and pyrite which can be comprehensive recovered. In order to serve the feasible research and design considerations for developing the mine，carried out four kinds of processes as：discadrding -75 mm tailings via dry magnetic separation-stage grinding and dressing by floatation then magnetic separation or magnetic separation then floatation，stage grinding and dressing by directly floatation then magnetic separation or magnetic separation then floatation to raw ore. According to the test results，commend the process of discadrding -75 mm tailings via dry magnetic separation-stage grinding and dressing by magnetic separation then floatation. This kind process can advancely discard the 21.04% yield of waste-rock and finally get the iron concentrate with iron grade 66.10%，iron recovery 83.48%，content of sulfur 0.26%，copper concentrate with copper grade 15.04%，copper recovery 63.27%，and sulfur concentrate with sulfur frade 45.51%，sulfur recovery 72.89%.

Key words: Magnetite with copper and sulfur, Discarding tailings via dry magnetic separation, Flotation then magnetic separation, Magnetic separation then flotation, Stage grinding and dressing