提升某高硫低铜品位铜硫矿铜浮选回收指标试验研究  

Improving Copper Flotation Recovery from a Copper-Sulfur Ore with High Sulfur and Low Copper

作　　者：李志婷 彭华锋 汪庶明 先永骏[1] 李豪 LI Zhiting;PENG Huafeng;WANG Shuming;XIAN Yongjun;LI Hao(Collage of Land and Resources and Engineering,Kunming University of Science and Technology,Kunming 650093,China;TCIGCL Xin Qiao Mining Corporation Ltd.,Tongling 244000,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]铜陵化工集团新桥矿业有限公司,安徽铜陵244000

出　　处：《有色金属工程》2024年第5期88-94,共7页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(52264027);云南省万人计划青年拔尖人才项目(YNWR-QNBJ-2019-051)。

摘　　要：安徽铜陵某铜硫矿浮选厂处理的原矿含铜0.34%,其中硫化铜占近93%,含硫31.26%,属于高硫低铜硫化矿。选厂铜回收率长期维持在82%~84%,明显低于原矿中硫化铜理论回收率。为提升该矿石中铜的回收,开展磨矿细度优化以及复合酯类捕收剂强化铜浮选的试验研究。结果表明,在磨矿细度-74μm占75%,使用复合酯类捕收剂的条件下,小型闭路试验获得铜精矿铜品位为16.43%,铜回收率达到94.07%的指标,较现场指标分别提高1个和9个百分点;通过对小试和现场产品的粒级组成深入分析,得出现场磨矿细度不足,磨矿产品粒度组成不均匀是造成铜损失在尾矿的关键原因。同时,小试结果证明使用新型复合酯类捕收剂可强化微细粒铜矿物的回收。为选厂在实际生产中提升指标提供了科学的方向和依据。A copper-sulfur ore from Tongling of Anhui Province contains 0.34%copper and 31.26%sulfur,in which the copper mainly occurs in form of sulfides(93%),and thus it can be defined as sulfide ore of high sulfur and low copper.The copper recovery in the flotation practice has been maintained at 82%—84%in the past years,which is significantly lower than the theoretical recovery of copper sulfides in the raw ore.In order to improve the copper recovery,in this work,bench-scale flotation tests were performed for investigating the effects of grinding fineness and multiple esters combination collector on the copper flotation recovery.Under the optimized conditions of 75%-74μm grinding fineness and using multiple esters combination collector,a copper concentrate assaying 16.43%Cu with 94.07%Cu recovery was obtained,which were respectively increased by 1 and 9 percentage point than that of produced from industrial production.Through in-depth analysis of the size fraction distributions of products from the tests and industrial production,we found that the insufficient grinding fineness and the uneven particle size distribution in the grinding products are the key reasons for the copper loss in the tailings.In addition,the tests results indicated that the multiple esters combination collector can effectively enhance the recovery of ultra-fine copper minerals.These would provide a scientific guidance and basis for improving the copper recovery in industrial production.

关 键 词：铜硫矿 低铜品位 浮选 粒级分布 复合酯类捕收剂 

分 类 号：TD952[矿业工程—选矿] TD923