含砷银精矿中砷的除杂研究  

Study on Arsenic Removal from Arsenic-Bearing Silver Concentrate

作　　者：周龙 马华菊 周素莲 Zhou Long;Ma Huaju;Zhou Sulian(Guilin University of Technology at Nanning Guangxi Nanning,Nanning,Guangxi,China)

机构地区：[1]桂林理工大学南宁分校,广西南宁530001

出　　处：《矿产综合利用》2023年第3期127-131,共5页Multipurpose Utilization of Mineral Resources

基　　金：广西科技基地与人才专项(桂科AD17129007)。

摘　　要：这是一篇冶金工程领域的论文。以广西某矿浮选的银精矿为研究对象,通过XRD、TG分析显示,其主要成分为硫化银、硫化铁、毒砂、硫化锰、氧化锰等,煅烧分解温度在470~750℃之间。通过热力学软件模拟计算银精矿各组分在含氧氛中的分解产物,并研究了煅烧条件对银精矿中砷的去除影响,结果表明:缺氧气氛有利于毒砂分解为As_(2)O_(3)。较佳的煅烧条件为,以400 mL/min流速通入空气,10℃/min程序升温到500℃,保温30 min,砷去除率可达到87.66%。This is a paper in the field of metallurgical engineering.Flotation silver concentrate from a mine in Guangxi was characterized by XRD and TG,the result displays that,its main components are silver sulfide,ron sulfide,arsenopyrite,manganese sulfide,manganese oxide,etc,and the calcination decomposition temperature is 470~750℃.The decomposition products of each component in an oxygen-containing atmosphere are simulated and calculated by thermodynamic software,and the effect of calcination conditions on the removal of arsenic in silver concentrate is studied,the results of which show that the hypoxic environment is conducive to the decomposition of arsenopyrite into As_(2)O_(3),and the optimal calcination conditions are as follows:the flow rate of 400 mL/min is through air,the temperature is raised to 500℃at 10℃/min,and the removal rate of arsenic can reach 87.66%after holding for 30 min.

关 键 词：银精矿 冶金工程 砷 煅烧条件 热力学计算 

分 类 号：TD982[矿业工程—选矿]