西藏某难选铅锌银硫多金属矿选矿工艺研究

西藏某难选铅锌银硫多金属硫化矿中铅、锌、硫矿物相互关系密切,特别是锌矿物内部普遍包含磁黄铁矿的离溶物以及细粒黄铜矿难以解离,并且部分磁黄铁矿可浮性较好,致使锌硫分离困难.针对该难选多金属矿的矿石性质,采用合理的一段磨矿铅、锌、硫依次优先浮选,浮选锌精矿磁选脱硫的工艺流程,对原矿中铅、锌、银、硫进行回收,通过详细的条件试...

Study on Pb-Zn-Ag of Multi-metalliferous Ore Floation Technology in Tibet

The Pb-Zn-Ag of multi-metalliferous ore in Tibet is very difficult to recovery,as the lead,zinc,pyrrhotite and pyrite are interacted with each other in sulfide ore.Generally,the fine pyrrhotite is distributed in the zinc minerals by the litter drops,which is difficult to hold the high grade zinc concentrate. It is difficult to separate zinc from other sulfide ore,because the floatability of pyrrhotite and pyrite is as better as zinc.Based on the nature of the multi-metal ore,many trails by one-stage grinding flotation process were investigated to recover lead,zinc,silver,pyrrhotite and pyrite.Meantime,condition tests were tested,optimum processes and technological parameters were determined by the closed circuit trials.The final index of trails are as follows：the lead concentrate grade of Pb 61.02%,recovery of Pb 90.97%,grade of Ag 2 018.4g/t,recovery of Ag 84.49%,grade of Zn 5.23%;the zinc concentrate：grade of Zn 47.85%,recovery of Zn 83.92%,grade of Ag 65.62g/t,grade of Pb 1.54%.The grade and recovery of the lead and zinc concentrate are increased significantly,which makes the complex multi-metalliferous ore more useful.