某金矿石工艺矿物学研究  

Study on the process mineralogy of a gold ore in Qinghai

作　　者：刘玉川 殷录成 陈攀[1] 熊馨[1] Liu Yuchuan;Yin Lucheng;Chen Pan;Xiong Xin(Qinghai Province Geology Ore Testing and Application Center;Qinghai Qaidam Institute of Comprehensive Geology and Mineral Exploration)

机构地区：[1]青海省地质矿产测试应用中心 [2]青海省柴达木综合地质矿产勘查院

出　　处：《黄金》2023年第1期63-67,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：通过化学分析、X射线衍射仪、偏光显微镜、扫描电子显微镜等手段,对青海某金矿矿石进行了工艺矿物学研究,查明了矿石中的矿物组成、金属矿物及脉石矿物嵌布特征、嵌布粒度等。结果表明:矿石中可回收元素为金,原矿金品位为4.95 g/t、银品位为5.00 g/t,矿石类型为强破碎石英岩(脉)型金矿石和强蚀变破碎凝灰岩型金矿石。矿石中金属矿物主要为毒砂、黄铁矿、褐铁矿,少量黄铜矿和自然金;脉石矿物为石英、绢(白)云母、黑云母、碳酸盐矿物、电气石等。矿石中金矿物嵌布状态主要为裸露及半裸露自然金。根据矿石性质,经过试验结果对比,推荐流程为原矿尼尔森重选—尾矿环保浸金剂浸出工艺流程。By means of chemical analysis,X-ray diffractometry,polarizing microscope,and scanning electron microscope,the process mineralogy of a gold ore in Qinghai Province was studied,and the mineral composition,metallic mineral,and gangue mineral distribution characteristics and disseminated particle size of the ore were found out.The results show that the recoverable element in the ore is gold,the grade of raw gold is 4.95 g/t,the grade of silver is 5.00 g/t,and the ore types are strongly broken quartzite(vein)type gold ore and strongly altered broken tuff type gold ore.The main metal minerals in the ore are arsenopyrite,pyrite,limonite,a small amount of chalcopyrite,and native gold;and the gangue minerals are quartz,sericite(white)mica,biotite,carbonate minerals,tourmaline,and so on.The occurrence state of gold in the ore is mainly bare and semi-bare native gold.According to the nature of the ore,after the comparison of the test results,the recommended process is the process of Nelson gravity separation of raw ore-leaching of tailings with environment-friendly gold leaching agent.

关 键 词：金矿石 嵌布粒度 工艺矿物学 尼尔森重选 环保浸金 

分 类 号：TD91[矿业工程—选矿]