Recovery of copper and cobalt from waste rock in Democratic Republic of Congo by gravity separation combined with flotation  

采用重选-浮选联合工艺从刚果(金)废石矿中回收铜和钴

作　　者：Qing-qing WANG Lei SUN Yang CAO Xin WANG Yi QIAO Mei-tao XIANG Guo-bin LIU Wei SUN 汪清清;孙磊;曹杨;王鑫;乔毅;向美桃;刘国斌;孙伟(中南大学资源加工与生物工程学院,长沙410083;中南大学战略含钙矿物资源清洁高效利用湖南省重点实验室,长沙410083)

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China [2]Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2025年第2期602-612,共11页中国有色金属学报(英文版)

基　　金：National Key Research and Development Program of China (No. 2020YFC1909202);Major Science and Technology Program of Yunnan Province,China (No. 202202AB080012) for financial support。

摘　　要：Copper and cobalt were recovered from SICOMINES mining waste rock in the Democratic Republic of Congo.The process mineralogy of the samples was analyzed using scanning electron microscopy and energy dispersive spectroscopy.The results showed that copper minerals exhibited various forms and uneven particle sizes,while cobalt existed in the form of highly dispersed asbolane,and large amounts of easily slimed gangue minerals were filled in the samples,making it difficult to separate copper and cobalt minerals.The particle size range plays a decisive role in selecting the separation method for the copper−cobalt ore.Gravity separation was suitable for particles ranging from 43 to 246μm,while flotation was more effective for particles below 43μm.After ore grinding and particle size classification,applying a combined gravity separation(shaking table)−flotation method yielded concentrated minerals with a copper recovery of 72.83%and a cobalt recovery of 31.13%.从刚果(金)SICOMINES矿区废石矿中回收铜和钴金属。通过扫描电镜和能谱分析对矿样进行工艺矿物学分析。结果表明,铜矿物赋存形式多样且粒度不均匀;钴以高度分散的钴土矿形式存在,大量易泥化脉石矿物填充在样品中,造成铜钴矿物分离困难。粒度范围对该铜钴矿样品分选方法的选择具有决定性作用,对于43~246μm粒级的样品,宜采用重选选别,而对于<43μm粒级的样品浮选表现出更优异的富集效果。矿样经粗磨分级后,采用重选-浮选的联合方法,可获得铜回收率为72.83%、钴回收率为31.13%的精矿产品。

关 键 词：copper−cobalt waste ore process mineralogy pre-classification FLOTATION gravity separation 

分 类 号：TD95[矿业工程—选矿]