内蒙古某铁铜锌锡多金属矿选矿工艺研究

Study on Mineral Processing Technology of Certain Fe-Cu-Zn-Sn Ore in Inner Mongolia

内蒙古某铁铜锌锡多金属矿是我国大型的铁锡为主的多金属共生矿,含铁35.54%、铜0.082%、锌0.85%、锡0.54%,主要回收的目的矿物为磁铁矿、黄铜矿、闪锌矿和锡石。通过多种选矿工艺流程的探讨和详细试验研究,最终采用磁选—铜锌混合浮选(铜锌分离)—锡重选(浮选脱砷)联合流程回收该矿中的铁、铜、锌和锡矿物,实验室闭路试验指标为铁精矿含铁66.37%、铁回收率83.57%,铜精矿含铜20.34%、铜回收率56.96%,锌精矿含锌45.21%、锌回收率80.02%,锡精矿含锡35.04%、锡回收率39.61%。

A Fe-Cu-Zn-Sn ore in Inner Mongolia is a China typical large iron-tin polymetallic deposit, which contains Fe 35.54%, Cu 0. 082% , Zn 0. 85%, Sn 0. 54% . The valuable metals mainly exist in magnetite, chaleopyrite, sphalerite and cassiterite. To make good use of the metals in the ore, systematic experiments were carried out. Finally, the flowsheet of combined magnetic separation, Cu-Zn bulk flotation （ Cu-Zn separation）, Sn gravity concentration （ dearsenization of tin rough concentrate） process was adopted. The results of locked-circuit test are as follows： iron concentrate of Fe 66. 37% with recovery 83.57% , copper concentrate of Cu 20. 34% with recovery 56. 96%, zinc concentrate of Zn 45.21% with recovery 80. 02% , tin concentrate of Sn 35.04% with recovery 39. 61%.