西藏某铜矿选矿工艺技术试验研究

对西藏某铜矿的试验样品进行了先选硫化铜、再选氧化铜的浮选工艺流程研究,采用该流程获得的指标为:硫化铜精矿品位33.83%、回收率69.71%;氧化铜精矿品位16.84%、回收率17.35%;总精矿品位28.17%,铜回收率87.06%。由于尾矿中铜品位尚有0.40%,经制片镜下检查表明,损失于尾矿中的铜主要是氧化铜,其存在形式主要以包裹体存在于脉石中,因此对该工艺流程的尾矿进行了再处理。对闭路浮选试验尾矿分别进行了氨和硫酸不同浓度、不同浸出时间的浸出试验,试验结果表明,用一定量的硫酸浸出可将尾矿铜降至0.11%,充分表明了该铜矿具有较高的资源价值。

THE TECHNICAL OF PROCESSING STUDY ON COPPER ORE IN TIBET

This case researched one complex copper ore in somewhere of Tibet. The technological flowsheet is the flotation of sulphide copper ore first, and then the flotation of oxide copper ore.The result of this research is: concentrate grade of sulphide copper ore is 33.83% ;concentrate recovery of sulphide copper ore is 69.71% ;concentrate grade of oxide copper ore is 16.84% ;concentrate recovery of oxide copper ore is 17.34% ;and the total concentrate grade of copper ore is 28.17% ;and the total concentrate recovery of copper ore is 87.06%. Because tailings grade of copper is still high to 0.40%, and the main copper in tailings is oxide copper (by microscopic analysis),and the main dissemination characteristic is inclusion in gangues,so this case researched the treatment of tailings. This treatment includes leaching experiments using ammonia and sulfuric acid in different time and different density. The result indicates: That leach the tailings with certain quality of sulfuric acid could reduce the tailings grade to 0.11%. So this research full indicates that this copper ore possesses high values for copper ore resource.