西岭金矿工艺矿物学及综合回收  

Process mineralogy and comprehensive recovery of Xiling Gold deposit

作　　者：陆红羽 李磊 罗思岗 汤亦婧 赵杰 胡志凯 王国强 LU Hongyu;LI Lei;LUO Sigang;TANG Yijing;ZHAO Jie;HU Zhikai;WANG Guoqiang(BGRIMM Technology Group,Beijing 100160,China;State Key Laboratory of Mineral Processing,Beijing 102628,China)

机构地区：[1]矿冶科技集团有限公司,北京100160 [2]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《矿冶》2024年第4期566-573,630,共9页Mining And Metallurgy

基　　金：中国和乌兹别克斯坦政府间联合研发项目(2022YFE0126700)。

摘　　要：西岭金矿是世界级的巨型单体金矿床,该金矿含金3.81 g/t,回收价值大。采用光学显微镜、扫描电镜、矿物自动分析仪(AMICS)等技术手段,对西岭金矿的矿石成分、矿物组成、金及其载体矿物的嵌布粒度和赋存状态等工艺矿物学特征进行分析,明确了西岭金矿的选冶特性。结果表明,矿石中金主要以自然金和银金矿的形式存在;金属矿物大部分为黄铁矿,少量闪锌矿、黄铜矿、方铅矿、毒砂等;非金属矿物主要为石英,其次为白云母、斜长石、钾长石等;矿石中金矿物主要以裸露金形式产出,其嵌布粒度主要集中于10μm以上;金矿物与黄铁矿的嵌布关系较为紧密,黄铁矿的嵌布粒度相对较粗,在合适的磨矿细度下,较易通过全硫化物浮选方式对金进行回收。在工艺矿物学分析结果的基础上,采用全硫化物浮选工艺对西岭金矿进行处理,结果表明,在合适的磨矿细度和药剂制度条件下,全流程闭路试验获得了金精矿含Au 62.77 g/t、Au回收率98.89%的选矿指标。The Xiling Gold Mine is a world-class giant monolithic gold deposit with an average gold content of 3.81 g/t,offering significant mining value.Utilizing techniques such as optical microscopy,scanning electron microscopy,and the mineral automatic analysis instrument(AMICS),the process mineralogical characteristics of the ore from the Xiling Gold Mine were analyzed,including an examination of mineral composition,dissemination grade,existence state of gold and its carrier minerals,and other pertinent features.The results indicate that gold in the ore primarily exists in the form of native gold and electrum.The majority of metal minerals are pyrite,accompanied by small quantities of sphalerite,chalcopyrite,galena,and arsenopyrite.Non-metallic minerals are predominantly quartz followed by muscovite,orthoclase,and potassium feldspar.Gold minerals within the ore mainly occurred in exposed gold form with a dissemination grain size concentrated above 10μm.There is a close relationship between gold minerals and pyrite regarding their dissemination patterns;pyrite exhibits relatively coarse dissemination grain sizes,and the gold can be easily recovered under appropriate grinding fineness conditions at suitable reagent dosages during processing using full sulfide flotation technology.Based on the results of the process mineralogy analysis,the Xiling gold mine was processed using the full sulfide flotation process.The results of the closed-circuit flow test show that under appropriate grinding fineness and reagent system conditions,the mineral processing indicators of Au 62.77 g/t with an Au recovery rate reaching 98.89%can be achived.

关 键 词：金矿 黄铁矿 工艺矿物学 自然金 浮选 金精矿 

分 类 号：TD953[矿业工程—选矿]