某金精矿焙烧氧化-氰化尾矿工艺矿物学研究  

Research on Process Mineralogy of Roasting Oxidation-cyanide Tailings of a Gold Concentrate

作　　者：邓元良 明平田 王广伟 叶江 Deng Yuanliang;Ming Pingtian;Wang Guangwei;Ye Jeang(Qinghai 6th Institute of Geology Exploration,Golmud,Qinghai,China;Doulan Jinhui Mining Co.,Ltd.,Qinghai Engineering of Research Center for Gold Mineral Resourses Development,Dulan,Qinghai,China)

机构地区：[1]青海省第六地质勘查院,青海格尔木816000 [2]都兰金辉矿业有限公司,青海省金矿资源开发工程技术研究中心,青海都兰816100

出　　处：《矿产综合利用》2020年第4期121-125,共5页Multipurpose Utilization of Mineral Resources

基　　金：青海省重点研发与转化计划项目(2019-SF-139)资助。

摘　　要：为了查找某难处理金精矿焙烧氧化-氰化浸出工艺存在的问题,提高金的回收率,开展了尾矿工艺矿物学研究,查明了尾矿的矿石成分、矿物相对含量、硫化矿物的特征、金的赋存状态及其粒度特征。分析了工艺存在的问题,提出了工艺优化的技术措施和有价元素的综合利用研究思路。该尾矿金品位为3.98 g/t,金的嵌布粒度小于10 μm,包裹金占73.40%,连生体金占26.60%,提高焙砂的磨矿细度和延长浸出时间,有利于提高金的浸出率。In order to find out the problems in the roasting oxidation-cyanide leaching process of a refractory gold concentrate,and improve the recovery rate of gold,the tailings process mineralogical study was carried out.This study shows that the ore composition,relative mineral content,sulfide mineral characteristics and occurrence state of gold and particle size characteristics of tailings have already been identified.By analyzing the existing problems,the technological measures for optimizing the process and the valuable elements of comprehensive utilization research ideas were put forward.The gold grade of tailings is 3.98 g/t,the size of gold embedded is less than 10 micron in tailings,the gold encapsulated accounts for 73.40%,and the conjoined gold accounts for 26.60%.A lot of experiments have shown that increasing the grinding fineness of roasting products and prolonging the leaching time are conducive to improving the gold leaching recovery.

关 键 词：难处理金矿 氰化浸出尾矿 工艺矿物学 嵌布粒度 赋存状态 

分 类 号：TD952[矿业工程—选矿]