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作 者:王坤举 李强 王成行 李沛伦 吕昊子 WANG Kunju;LI Qiang;WANG Chenghang;LI Peilun;LÜHaozi(New Steel Union Group Cheetah Chrome South Africa(CCSA),Hohhot 010000,China;Institute of Resources Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510650,China;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,China;Guangdong Provincial Key Laboratory of Development&Comprehensive Utilization of Mineral Resources,Guangzhou 510650,China)
机构地区:[1]新钢联集团南非猎豹矿业有限公司,内蒙古呼和浩特010000 [2]广东省科学院资源利用与稀土开发研究所,广东广州510650 [3]稀有金属分离与综合利用国家重点实验室,广东广州510650 [4]广东省矿产资源开发和综合利用重点实验室,广东广州510650
出 处:《金属矿山》2025年第4期128-133,共6页Metal Mine
基 金:“十四五”国家重点研发计划项目(编号:2022YFC2905104);广东省科学院发展专项资金项目(编号:2022GDASZH-2022010104)。
摘 要:内蒙古某含锡锌低品位铜矿石的铜、锡和锌品位分别为0.69%、0.12%和0.30%,原生产工艺仅对铜进行回收。为了完善工艺流程,提高资源的综合利用率,在对矿石进行工艺矿物学研究的基础上进行了选矿工艺流程研究。研究结果表明,矿石中的铜、锌、锡主要以黄铜矿、铁闪锌矿、锡石的形式赋存,元素占有率均在93%~95%,且这些矿物总体嵌布粒度较粗,锡石的嵌布粒度更粗且易解离,这为粗磨情况下浮选分离硫锡、减少锡石的过磨损失创造了条件。矿石在磨矿细度为-0.074 mm占65%的情况下,采用1粗1精1扫流程混浮铜锌、1粗1精1扫流程选硫,铜锌混浮精矿再磨细度为-0.043 mm占80%的情况下,采用1粗2精1扫流程抑锌浮铜、铜尾矿采用1粗2精1扫流程选锌,获得了铜品位22.72%、含锌1.37%、铜回收率94.50%的铜精矿,锌品位41.23%、含铜0.75%、锌回收率65.97%的锌精矿,硫品位23.25%、硫回收率63.55%的高硫产品。浮选尾矿采用1粗1精摇床重选流程选锡,获得了锡品位50.20%、回收率22.28%的锡精矿,以及锡品位8.52%、回收率18.27%的锡次精矿。有效实现了低品位铜矿石中锡、锌的综合回收。A low-grade zinc-tin-bearing copper ore from Inner Mongolia contains Cu of 0.69%,Sn of 0.12%,and Zn of 0.30%.The original production process only recovered copper.In order to optimize the flowsheet and improve comprehensive resource utilization,mineral processing studies were conducted based on process mineralogy.Results indicated that copper,zinc,and tin primarily occur as chalcopyrite,marmatite,and cassiterite,respectively,with element occupancy rates of 93%-95%.These minerals exhibit coarsely disseminated grain sizes,particularly cassiterite,which shows coarser dissemination and is readily liberated,enabling sulfur-tin flotation separation under coarse grinding conditions to minimize cassiterite overgrinding losses.At a grinding fineness of 65%passing 0.074 mm,a combined copper-zinc bulk flotation circuit(one roughing,one cleaning,and one scavenging)and a sulfur flotation circuit(one roughing,one cleaning,and one scavenging)were employed.The copper-zinc bulk concentrate was reground to 80%passing 0.043 mm,followed by zinc depression-copper flotation(one roughing,two cleanings,and one scavenging)and zinc flotation from copper tailings(one roughing,two cleanings,and one scavenging).A copper concentrate with copper grade of 22.72%,zinc content of 1.37%and copper recovery rate of 94.50%,a zinc concentrate with zinc grade of 41.23%,copper content of 0.75%and zinc recovery rate of 65.97%,and a high sulfur product with sulfur grade of 23.25%and sulfur recovery rate of 63.55%were obtained.Tin concentrate with tin grade of 50.20%and recovery rate of 22.28%and secondary tin concentrate with tin grade of 8.52%and recovery rate of 18.27%were obtained by using one roughing and one cleaning shaker gravity separation process for flotation tailings.The comprehen-sive recovery of tin and zinc from low grade copper ore is realized effectively.
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