内蒙古某高硫高砷难处理铜铅锌矿石选矿工艺试验研究

内蒙古某铜铅锌硫化矿石中铜、铅、锌含量分别为0.26%、0.72%、4.60%，硫、砷含量分别为13.14%、2.49%，属于高硫高砷难处理硫化矿石。为实现矿石中铜、铅、锌、硫的有效回收，避免传统高碱法带 来的一系列问题，开展了铜铅混浮、磁选脱硫、锌浮选条件试验研究。在此基础上，经“铜铅混浮（粗精矿再磨精选）—铜铅混合尾矿磁选脱硫—锌浮选”全流程闭路试验，最终可获得铜、铅、银品位分别为9.27%、 40.53%、4 397.76 g/t，铜、铅、银回收率分别为59.22%、88.93%、74.05%的铜铅混合精矿，及锌品位45.94%、锌回收率93.10%的锌精矿，选别指标良好，实现了铜、铅、锌及伴生银的有效回收，降低了精矿中有害 杂质砷的含量。

Study on Mineral Processing Technology of a Refractory Copper-lead-zinc Ore with High Sulfur and Arsenic from Inner Mongolia

A copper， lead and zinc sulfide ore from Inner Mongolia belongs to high-sulfur and high-arsenic with the contents of copper， lead and zinc of 0.26%， 0.72% and 4.60%， respectively， and the contents of sulfur and arsenic in the ores are 13.14% and 2.49%， respectively. In order to realize the effective recovery of copper， lead， zinc and sulfur in the ores and avoid a series of problems caused by traditional high alkalinity method， the conditions tests of copper-lead bulk flotation， magnetic separation for desulfurizing and zinc flotation were studied. The whole process closed-circuit test including the copper-lead bulk flotation with roughing concentrate regrinding cleaning， magnetic separation for desulfurizing with bulk tailings and zinc flotation was conducted based on the conditional test. Finally， the copper and lead mixing concentrate with the copper of 9.27%， the lead of 40.53% and the silver of 4 397.76 g/t were obtained and the recovery rate was 59.22%， 88.93% and 74.05%， respectively. The zinc concentrate with zinc grade of 45.94% and zinc recovery rate of 93.10% was obtained， which realized the effective recovery of associated silver and reduced the harmful impurity arsenic contents in the concentrate.