青海某微细粒浸染型难处理金矿石工艺矿物学研究  

Process mineralogy of a microfine disseminated refractory gold ore from Qinghai

作　　者：铁颖 熊召华 胡梦忠 马生萍 Tie Ying;Xiong Zhaohua;Hu Mengzhong;Ma Shengping(No.6 Geological Survey Institute of Qinghai Province;Qinghai Province Gold Ore Resources Development Engineering Technology Research Center)

机构地区：[1]青海省第六地质勘查院 [2]青海省金矿资源开发工程技术研究中心

出　　处：《黄金》2022年第4期79-83,共5页Gold

基　　金：青海省重点研发与转化计划项目(2019-SF-139)。

摘　　要：采用显微镜、X射线衍射仪、化学分析等多种手段,对青海某金矿石进行了工艺矿物学研究,查明矿石中矿物组成、主要矿物嵌布状态、嵌布粒度等。结果表明:矿石中主要有价元素为金,伴生低品位银,金品位4.20 g/t、银品位<2.0 g/t、碳品位1.17%、硫品位1.92%,属微细粒—超微细粒浸染型高碳低硫极难处理金矿石;金主要以微细粒、超微细粒包裹于毒砂和黄铁矿中,部分以单体金形式嵌布于脉石矿物中;毒砂、黄铁矿嵌布粒度较粗,硫化矿物包裹金可通过初步磨矿达到回收效果,脉石矿物中金则需要进一步磨矿进行回收。The process mineralogy of a gold ore from Qinghai is studied by means of microscope,X-ray diffracto-meter and chemical analysis,and the mineral composition,embedding status of main mineral,embedding grain size are investigated.The results show that the main valuable elements are gold associated with low-grade silver.The gold grade is 4.20 g/t,silver grade<2.0 g/t,carbon grade 1.17%and sulfur grade 1.92%,indicating that the gold ore belongs to microfine-super microfine disseminated high-carbon low-sulfur extremely refractory gold ore;gold is wrapped in arsenopyrite and pyrite,mainly in form of mircofine and super microfine particles,part of the gold is embedded in gangue minerals in form of monomer gold;arsenopyrite and pyrite are embedded in coarse grain,the gold wrapped in sulfide mineral can be recovered via preliminary grinding while the gold in gangue minerals needs to be ground further before recovery.

关 键 词：难处理金矿石 微细粒 浸染 工艺矿物学 中矿再磨 

分 类 号：TD91[矿业工程—选矿]