西北某低铅高锌多金属硫化矿浮选实验

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

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。

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.