刚果(金)某铜钴矿石工艺矿物学研究

Study on Process Mineralogy of a Copper-Cobalt Ore in Congo(Kinshasa)

为给刚果(金)某特大型铜钴矿的开发利用工艺研究提供基础数据,进行了工艺矿物学研究。结果表明,矿石铜品位为3.12%、钴品位为0.15%,铜主要以辉铜矿、赤铜矿、孔雀石的形式存在,钴主要以水钴矿和硬锰矿的形式存在。矿石中脉石矿物主要为石英、绢云母、绿泥石等。孔雀石、硅孔雀石嵌布粒度较粗,但粗细不均匀,主要粒度范围在0.04~0.64 mm;辉铜矿的嵌布粒度中等,粒度大小较均匀,主要粒度范围在0.02~0.32 mm;赤铜矿嵌布粒度与辉铜矿类似,主要粒度范围在0.02~0.32 mm;水钴矿的嵌布粒度较均匀,主要粒度范围在0.02~0.16 mm。有用矿物多呈不规则粒状分布,且矿物之间形成复杂的连生关系。硫化铜和赤铜矿精矿铜的理论回收率在50%左右,氧化铜精矿的理论回收率在41%左右;硫化铜和赤铜矿精矿中钴的理论回收率约为2%,氧化钴精矿的理论回收率在50%左右,分散于粉砂岩中的钴占总钴的30%左右。

The process mineralogy study of a copper-cobalt ore in Congo(Kinshasa)was carried out to supply the essential data for the exploitation and utilization.The results indicated that the copper grade in the ore is 3.12%and the cobalt grade is 0.15%.Copper mainly exists in the form of chalcocite,cuprite and malachite,and cobalt mainly exists in the form of heterogenite and psilomelane.Gangue minerals in the ore are mainly quartz,sericite chlorite and so on.Dissemination granularity of malachite and silica-malachite are coarse and uneven,mainly ranging from 0.04 mm to 0.64 mm;Dissemination granularity of chalcocite is medium and well-distributed,mainly ranging from 0.02 mm to 0.32 mm;Dissemination granularity of cuprite is similar to that of chalcocite,mainly ranging from 0.02 mm to 0.32 mm;Dissemination granularity of heterogenite is well-distributed,mainly ranging from 0.02 mm to 0.16 mm.Most of the useful minerals are irregularly distributed in granular form,and complex intergrowth relationship exists in the minerals.The theoretical recovery of copper sulfide and cuprite concentrate is about 50%,and that of copper oxide concentrate is about 41%;The theoretical recovery of cobalt in copper sulfide and cuprite concentrate is about 2%,that of cobalt oxide concentrate is about 50%.Cobalt dispersed in siltstone is about 30%of total cobalt.