云南某高硫高铁铅锌矿浮选分离试验研究

云南某高硫高铁铅锌矿含铅5.80%,含锌18.90%,含硫36.40%,属于复杂难选硫化矿,其中伴生贵金属银含量达80 g/t。矿石中主要金属矿物为方铅矿、闪锌矿、黄铁矿等。通过对铅锌多金属硫化矿的浮选分离研究,采用“铅硫混合浮选-铅硫分离-尾矿再选锌”的浮选工艺流程,在磨矿细度为-74μm占70%时,优化药剂条件与添加方式,获得良好的分选指标。获得了铅精矿铅品位58.37%,铅回收率86.02%,锌精矿锌品位为50.25%,锌回收率为94.38%,铅精矿含银430.9 g/t,银回收率为44.84%,有价元素得到了有效回收。

Research on Flotation Separation of High Sulfur and High Iron Pb-Zn Ore in Yunnan Province

The lead-zinc ore in Yunnan contains lead 5.80%,zinc 18.90% and sulfur 36.40%,and it is a complex refractory sulfide ore.The content of rare metal silver is 80 g/t.The main valuable metallic minerals are galena,sphalerite and pyrite etc.Through the study on the flotation separation of Pb-Zn polymetallic sulfide ore,the flotation process of"Pb-S-floating,Pb-S-separating and Zn separation from tailings"is adopted,and the fineness of grinding is 70% to at 0.074 mm,the conditions and adding methods of the agents are optimized to obtain a good separation index.The lead grade of lead concentrate is 58.37%and the lead recovery is 86.02%.The zinc grade of zinc concentrate is 50.25% and the recovery rate is 94.38%.The silver grade of lead concentrate is 430.9 g/t and the recovery of silver is 44.84%.Using this technique,the valuable elements can be reclaimed effectively.