赞比亚卢安夏氧化铜矿工艺矿物学研究

Research on Technological Mineralogy of Copper Oxide Ore in Luanshya,Zambia

赞比亚卢安夏氧化铜矿目前尚未开采,矿石资源储量大,但品位低、难选冶,为了开发利用这部分难选矿石资源,开展了工艺矿物学研究.本文采用化学方法、XRD、显微镜以及SEM-EDS等测试手段进行分析.结果表明:粒级> 212μm占30. 13%,125～212μm占13. 80%,74～125μm占17. 00%,<74μm占39. 07%.矿石中铜有4种赋存状态:矿物状态铜、类质同象铜、吸附状态铜和少数胶体共沉淀铜.矿物状态铜主要以孔雀石、硅孔雀石和假孔雀石的形式存在;类质同象铜主要以黑云母、绿泥石和白云母形式存在;吸附状态铜主要以褐铁矿形式存在;胶体共沉淀铜主要以长石-石英-铜-铁胶结体形式存在.

The copper oxide ore in Luanshya,Zambia,is an unexplored mining area with large reserves of ore resources,which belongs to low-grade and refractory deposit.In order to develop and utilize the refractory resources,the technological mineralogy investigation was carried out by chemical analysis,XRD,microscopy,SEM-EDS and other testing methods.The results showed that in the ore,the ratio of the particles more than 212 μm,from 125 to 212 μm,from 74 to 125 μm,less than 74 μm is 30.13 %,13.80 %,17.00 %,39.07 %,respectively.There are four occurrence state types of copper in the ore:copper in mineral state,isomorphic copper,adsorbed copper,and a few copper in colloid co-precipitation.Among them,the copper in mineral state mainly exists in the form of malachite,chrysocolla and pseudo-malachiter.The isomorphic copper is mainly in the form of biotite,chlorite and muscovite.Adsorbed copper mainly exists in limonite.Colloid co-precipitated copper mainly exists in the cemented body of feldspar-quartz-copper-iron.