紫金山铜金矿中金铜银的赋存状态研究  

Study on occurrences of copper,gold and silver in Zijinshan Cu-Au deposit

作　　者：李美荣 孟庆波 梁冬云 沈贤德[2] 李波 张莉莉 LI Mei-rong;MENG Qing-bo;LIANG Dong-yun;SHEN Xian-de;LI Bo;ZHANG Li-li(Institute of Resources Utilization and Rare Earth Development,Guangdong Academy of Sciences,State Key Laboratory of Rare Metal Separation and Comprehensive Utilization,Guangdong Provincial Key Laboratory of Development&Comprehensive Utilization of Mineral Resources,Guangzhou 510650,China;Zijin Mining Group Co.Ltd.,Shanghang 364200,Fujian,China)

机构地区：[1]广东省科学院资源利用与稀土开发研究所,稀有金属分离与综合利用国家重点实验室,广东省矿产资源开发和综合利用重点实验室,广州510650 [2]紫金矿业集团股份有限公司,福建上杭364200

出　　处：《贵金属》2021年第2期41-48,共8页Precious Metals

基　　金：广州市科技计划项目(201804010423)。

摘　　要：采用矿物自动分析仪(MLA)、扫描电镜(SEM)、X射线衍射(XRD)研究了紫金山金铜矿入选矿石中有价元素铜、金、银的赋存状态以及分选过程中的金属走向。结果表明,铜矿物主要有蓝辉铜矿、铜蓝、硫砷铜矿,金银以游离矿物和硫化物包裹体为主。铜矿物常见沿明矾石溶蚀孔洞或碎裂缝隙充填,与黄铁矿密切连生,从原矿中分选铜矿物,理论品位为Cu 69.70%,理论回收率93.55%。中粒金嵌布于铜矿物和黄铁矿矿物粒间或裂隙,可随着铜和硫的回收进入铜、硫精矿,金的理论回收率分别为57.19%和27.27%;微细金粒包裹于明矾石和石英中,随脉石损失于尾矿中。银以显微银为主,多见呈微细粒包裹于硫化矿物中,铜精矿和硫精矿中银的理论回收率分别为56.96%和26.71%。The occurrences of the valuable elements copper,gold and silver in Zijinshan Cu-Au deposit ore and their trends in the separation process were studied by using MLA,SEM and XRD techniques.It was shown that copper minerals mainly included chalcocite,covellite,enargite,etc.,and that gold and silver minerals existed as dissociate minerals and sulfide inclusions.Copper minerals were commonly filled along dissolution holes or broken cracks of alunite,closely associated with pyrite.Separating copper minerals from the original ore,the theoretical grade was Cu 69.70%,and the theoretical recovery rate was 93.55%.Medium-grained gold embedded between grains or cracks of copper minerals and pyrite minerals,was obtained from copper and sulfur concentrates,and the theoretical recovery rates of gold in copper and sulfur concentrates were 57.19%and 27.27%,respectively.Fine gold particles were encapsulated in alunite and quartz,and lost in tailings along with gangue.Silver was dominated by microscopic silver,and it was mostly wrapped in sulfide minerals.The theoretical recovery rates of silver in copper and sulfur concentrates were 56.96%and 26.71%,respectively.

关 键 词：铜金矿 铜矿物 自然金 赋存状态 

分 类 号：TD982[矿业工程—选矿]