内蒙古某含银复杂多金属硫化矿选矿工艺研究

内蒙古某含银复杂多金属矿含银310.92g/t、铅4.65%、锌4.95%、铜0.44%、砷0.37%。矿石中铜、铅矿物共生关系复杂、嵌布粒度细、分离难度较大。经过多方案比较,采用了"铜铅部分优先浮选-铜铅混合精矿分离-铅、锌、砷顺序优先浮选"的工艺流程。最终获得的铜精矿中铜品位17.56%,铜回收率53.95%,银品位4 578.65g/t,银回收率20.20%;铅精矿中铅品位75.29%,铅回收率88.48%,银品位3 706.26g/t,银回收率65.85%;锌精矿中锌品位55.67%,锌回收率89.78%,银品位285.16g/t,银回收率7.38%;砷精矿中砷品位12.45%,砷回收率72.31%。

Research on Beneficiation Technology for a Complicated Silver-bearing Polymetallic Sulphide Ore in Neimenggu

The grade of Ag, Pb, Zn, Cu and As is 310.92g/t, 4.65%, 4.95%, 0.44%, 0.37% respectively, which is a complicated silver-bearing polymetallic sulphide ore located in Neimenggu province. The symbiotic relationship is complicated between copper and lead minerals in ores, the grain size is fine and it is difficult to be separated. The process is adopt by comparing muti-plans which is partially preferential flotation of copper and lead followed by separating flotation of mixed concentrate and sequential selective-flotation of lead, zinc and arsenic. Finally, the grade of Cu and Ag in copper concentrate is 17.56% and 4578.65g/t with recovery of 53.95% and 20.20% respectively; the grade of Pb and Ag in lead concentrate is 75.29% and 3706.26g/t with recovery of 88.48% and 65.85% respectively; the grade of Zn and Ag in zinc concentrate is 55.67% and 285.16g/t with recovery of 89.78% and 7.38% respectively; the grade of As in arsenic is 12.45% with recovery of 72.31%.