西北某低铅高锌多金属硫化矿浮选实验

西北某矿石铅品位2.56%，锌品位9.17%，伴生银品位18.60 g/t，属于低铅高锌硫化矿。为解决铅锌混合严重，铅精矿中含锌高的问题，对该矿石进行了大量的实验研究。结合工艺矿物学，进行了大量的抑锌药剂的探索，最终确定采用复合抑制剂T122具有较好的效果。根据条件实验及开路实验确定的较佳工艺条件，进行闭路流程实验，获得最终指标为铅精矿铅品位62.22%，回收率为92.42%，含锌5.79%的铅精矿。锌精矿中锌品位57.07%，回收率92.45%。伴生元素得到了较好的富集、回收，铅精矿中银品位390.90 g/t，银回收率76.50%。铅、锌及其伴生银均得到了较好的回收，实现了矿产资源的综合利用。 

Experimental Study on the Flotation of a Low Lead and High Zinc Polymetallic Sulfide Ore in Northwest China

An ore has a lead grade of 2.56%, a zinc grade of 9.17%, and an associated silver grade of 18.60 g/t in Northwest China, which is a low-lead and high-zinc sulfide ore. In order to solve the problem of serious lead-zinc mixing and high zinc contented in the lead concentrate, a large number of experimental studies have been done on the ore. Combined with process mineralogy, a large number of zinc-inhibiting agents were explored, and finally the composite inhibitor T122 was determined to have a good effect. According to the optimum process conditions determined by conditional test and open-circuit test, the closed-circuit process test was carried out, and the final index of the lead concentrate was 62.22%, the recovery rate was 92.42% and the lead concentrate containing 5.79% zinc. The grade of zinc in zinc concentrate is 57.07% and the recovery rate is 92.45%. The associated elements were well enriched and recovered, and the silver grade in lead concentrate was 390.90 g/t, and the silver recovery rate was 76.50%. Lead, zinc and their associated silver have been well recovered and the comprehensive utilization of mineral resources has been realized.