湖南某含砷金矿的选矿试验研究  

Research of Mineral Processing Experiments on Arsenic-Containing Gold Ore in Hunan Province

作　　者：梁斌珺 胡海祥 唐丽群 LIANG Binjun;HU Haixiang;TANG Liqun(Gannan University of Science and Technology,Ganzhou,Jiangxi 341000,China;Key Laboratory of Mine Geological Disaster Prevention and Control and Ecological Restoration,Ganzhou,Jiangxi 341000,China;Guangxi Vactional College of Safety Engineering,Nanning,Guangxi 530100,China)

机构地区：[1]赣南科技学院,江西赣州市341000 [2]矿山地质灾害预防控制与生态修复重点实验室,江西赣州市341000 [3]广西安全工程职业技术学院,广西南宁530100

出　　处：《矿业研究与开发》2022年第9期62-67,共6页Mining Research and Development

基　　金：江西省教育厅资助项目(GJJ181513);江西省自然科学基金面上项目(20202BAB204014);中国博士后科学基金资助项目(2020M671959);江西省博士后科研择优资助项目(2019KY51)。

摘　　要：湖南某金矿石中有价元素金的平均品位为3.40 g/t,金均以自然金的形式存在,主要载金矿物为毒砂和黄铁矿,有害元素砷和碳含量分别为0.36%和1.42%。金的解离分析表明,在磨矿细度-0.074 mm占65%的条件下,矿石中的可回收金主要以硫化物包裹金和单体及裸露金的形式存在,二者合计分布率为94.69%。根据矿石性质的研究结果,采用重选-浮选联合工艺对金矿物的回收进行了试验研究,在磨矿细度为-0.074 mm占64.1%的条件下,先经过摇床重选和淘洗得到重选精矿,再以重选和淘洗尾矿为原料,通过一粗二精三扫的闭路试验流程得到浮选精矿。将重选精矿和浮选精矿合并得到最终产品,最终产品中金的品位和回收率分别为113.91 g/t和93.14%,金的实际回收率与理论回收率仅相差1.55个百分点。The average grade of valuable element gold was 3.40 g/t in a gold mine in Hunan province,and all of the gold minerals exists in the form of natural gold.The main gold-bearing minerals are arsenopyrite and pyrite,and the contents of harmful elements arsenic and carbon are 0.36%and 1.42%,respectively.The dissociation analysis of gold shows that the recoverable gold mainly exists in the form of sulfide wrapped gold,monomer gold and bare gold,and the total distribution rate of the two is 94.69%under the condition of grinding fineness of-0.074 mm accounting for 65%.According to the research results of the ore properties,the gold content of recycling were studied by flotation combined gravity dressing technology under the conditions of grinding fineness of-0.074 mm account for 64.1%.Firstly,gravity concentrate was obtained by shaking table gravity separation and panning.Then,by taking the gravity separation and panning tailings as raw materials,flotation concentrate was obtained through closed-circuit test process with one roughing,two cleaning and three scavenging.Finally,the final product was obtained by combining gravity separation concentrate and flotation concentrate.The grade and recovery rate of gold in the final product were 113.91 g/t and 93.14%,respectively.The difference between the actual recovery rate and theoretical recovery rate of gold was only 1.55 percentage points.

关 键 词：含砷金矿 重选 浮选 金品位 金回收率 

分 类 号：TD953[矿业工程—选矿]