某铁矿矿石中铁矿物以磁铁矿为主,并伴生有少量可供综合回收的黄铜矿和黄铁矿.为了给该矿山的开发建设提供可行性研究和设计依据,进行了-75 mm干式磁选抛尾—先浮后磁或先磁后浮阶段磨选、原矿直接先浮后磁或先磁后浮阶段磨选共4种流程的选矿试验研究.根据试验结果,经分析比较,推荐采用-75 mm干式磁选抛尾—先磁后浮阶段磨选流程.该流程可预先抛弃产率达21.0.4％的废石,最终获得铁品位为66.10％、铁回收率为83.48％、硫含量为0.26％的铁精矿,铜品位为15.04％、铜回收率为63.27％的铜精矿以及硫品位为45.51％、硫回收率为72.89％的硫精矿%The major iron mineral of a iron ore is magnetite and associated with a spot of chalcopyrite and pyrite which can be comprehensive recovered. Tn 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%.
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