江西某铅锌银复杂多金属矿综合回收试验研究

Experimental study of comprehensive recovery of a polymetallic ore in Jiangxi province

江西某铅锌银多金属矿的特点是含硫高,并含有铅、锌、银、铁、锰等多种有用金属矿物可以回收利用.试验针对该多金属矿物中伴生复杂的情况,对比了铜铅锌优先浮选和铜铅锌优先浮选-锌粗精矿再磨-锌中矿磁选的工艺流程,后者获得了较好指标:铅精矿含Pb 49.57%,Pb回收率87.53%;锌精矿含Zn 45.82%,Zn回收率75.12%;硫精矿含S 44.69%,S回收率71.35%.针对铁锰以碳酸盐的形式存在,且与脉石伴生严重呈细粒嵌布的情况,采用磁选-焙烧-磁选的试验方案回收浮选尾矿中的铁锰,获得了较好的回收效果.

A polymetallic ore from Jiangxi Province has high content of sulfur, and contains lead, zinc, iron, manganese etc., which could be recovered. Due to the complicated association situation, the authors compared the common differential flotation process and the differential flotation process with the zinc rough concentrate reground and the zinc medium product processed through magnetic separation. Through the comparison, the latter process obtained desired concentrate： the lead concentrate contains 49.57 % Pb with the recovery of 87.53 %; the zinc concentrate contains 45.82 % Zn with a recovery of 75.12 %; the sulfur concentrate contains 44.69 % S with a recovery of 71.35 %. Due to the fact that iron and manganese existed as carbonate in this ore and they always associated with gangue minerals, the authors employ magnetic separation, roasting process and then magnetic separation to recover the iron and manganese in the flotation tailings.