湖北某贫细钼矿石选矿试验

Beneficiation Tests of Low Grade and Fine Disseminated Molybdenum Ore in Hubei Province

湖北某贫细钼矿石钼品位为0.129%,主要钼矿物辉钼矿以极细小片状或鳞片状单晶体形式分布在脉石矿物裂隙中,粒径约0.01 mm,属难解离钼矿石。为高效开发利用该矿石资源,采用阶段磨选流程对该矿石进行了选矿试验研究。结果表明,采用一段磨矿、1粗1精2扫、中矿顺序返回(扫选1精矿返回一段磨矿),一段闭路磨选精矿二段磨矿、1粗6精3扫、中矿顺序返回(精选1尾矿返回二段磨矿)闭路流程处理该试样,最终可获得Mo品位为51.08%、Mo回收率为85.92%的钼精矿。试验确定的工艺流程是该矿石的高效开发利用流程。

A low grade and fine disseminated molybdenum ore in Hubei Province contains 0. 129% of molybdenum, mostof which exist in form of molybdenite distributed in the fissures of gangues with small flakes or scaly single crystals. With grainsize of 0.01 mm, it is difficult to be liberated. In order to realize efficient exploitation of the mineral resources, stage grindingand stage separation process was conducted on the ore. The result showed that using the closed-circuit flowsheet of first grind-ing,one roughing-one cleaning-two scavenging, concentrate from first stage separation enduring regrinding, one roughing-sixcleaning-three scavenging and middles back to the fiowsheet in turn,molybdenum concentrate with 51.08% Mo and recovery of85.92% was obtained. The process can achieve high efficient development and utilization of the ore.