硫化铜矿中有害元素的赋存状态对铜回收的影响  

Influence of occurrence characteristics of harmful elements on copper recovery of copper sulfide ore

作　　者：叶小璐 肖仪武 郜伟 张聿隆 YE Xiao-lu;XIAO Yi-wu;GAO Wei;ZHANG Yu-long(BGRIMM Technology Group,Beijing 100160,China;State Key Laboratory of Mineral Group,Beijing 102628,China)

机构地区：[1]矿冶科技集团有限公司,北京100160 [2]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《矿冶》2021年第6期127-133,共7页Mining And Metallurgy

摘　　要：采用电子探针(EMPA)、光学显微镜、矿物自动定量分析系统(AMICS)、扫描电子显微镜-能谱分析(SEM-EDS),结合化学分析、化学物相等手段对某高砷硫化铜矿进行了工艺矿物学研究。结果表明,影响该铜矿铜有效分选的最主要矿物学因素为砷在矿石中的赋存状态:矿石中49.02%的铜赋存在硫砷铜矿中,同时81.86%的砷也赋存在硫砷铜矿中,这部分铜与砷无法通过选矿的方式分离。同时硫砷铜矿、砷黝铜矿等含砷的铜矿物和辉铜矿、斑铜矿等不含砷的铜矿物之间共生关系极为密切,互含严重,通过磨矿将含砷铜矿物与不含砷铜矿物分离的难度也极大。这样的矿石特性决定了虽然铜矿物的粒度较粗,单体和富连生体的比例在-0.074 mm占50%时已经达到了88.04%,能够保证较高的铜回收率及铜品位,但铜精矿中砷超标成为必然,影响对铜的回收。A process mineralogy of a copper sulfide ore with high arsenic content was studied by means of electron probe(EMPA)optical microscope mineral automatic quantitative analysis system(AMICS)scanning electron microscope and energy dispersive spectroscopy(SEM-EDS),combined with chemical analysis chemicals.Results show that the main major mineral factor that influence the effective of copper concentrate is the occurrence of As in the ore.Besides,there is a close relationship between arsenic-bearing copper minerals(enargite and arsenfahlerz),and no-arsenic copper mineral(chalcocite,bornite and chalcopyrite),hence,it is very difficult to separate arsenic-bearing copper minerals from non-arsenic-bearing copper minerals by grinding.Such ore characteristics determine that although the particle size of copper mineral is relatively coarse,and the proportion of monomer and rich continuum has reached 88.04%when-0.074 mm accounts for 50%,which can ensure high copper recovery rate and copper grade,it is inevitable that arsenic in copper concentrate exceeds the standard and affects the recovery of copper.

关 键 词：高砷硫化铜矿 矿物基因 有害元素 共生关系 

分 类 号：TD91[矿业工程—选矿]