含砷银铅锌矿工艺矿物学研究  

Process mineralogy study of a lead-zinc ore containing arsenic and silver

作　　者：陈巧妹 周浩 朱志伟 李昭旺 CHEN Qiaomei;ZHOU Hao;ZHU Zhiwei;LI Zhaowang(Changsha Institute of Mining Research Co.Ltd.,Changsha 410012,China)

机构地区：[1]长沙矿山研究院有限责任公司,长沙410012

出　　处：《矿冶》2024年第2期234-239,共6页Mining And Metallurgy

摘　　要：以呼伦贝尔某含砷银铅锌矿石为研究对象,利用化学多元素分析、物相分析、光学显微镜、MLA等多种分析手段对矿石进行工艺矿物学研究。结果表明:矿石中有用元素为铅和锌,质量分数分别为1.63%和1.72%,伴生贵金属银含量约46.31 g/t,有害元素As质量分数为0.34%;矿石中金属矿物主要为黄铁矿、闪锌矿、毒砂、磁黄铁矿、方铅矿,脉石矿物主要为石英、云母、长石、绿泥石、方解石等;矿石矿物粒径中等,+0.105 mm的方铅矿、闪锌矿和毒砂的占比分别为73.56%、79.2%、83.43%,属中粒粒级嵌布范畴,方铅矿和闪锌矿与其他矿物整体以毗邻镶嵌为主,少量方铅矿和闪锌矿沿黄铁矿、磁黄铁矿、毒砂、黄铜矿等矿物的裂隙或粒间充填交代,构成较为复杂的镶嵌关系,可能造成方铅矿-毒砂连生体和闪锌矿-毒砂连生体进入到铅精矿或锌精矿,导致铅精矿、锌精矿中含砷偏高。The process mineralogy of an arsenic-bearing lead-zinc-silver ore in Hulunbuir was studied by means of chemical multi-element analysis,phase analysis,optical microscope and MLA.The results show that the main metallic minerals in the ore are pyrite,sphalerite,arsenopyrite,pyrrhotite and galena,while the gangue minerals are quartz,mica,feldspar,chlorite and calcite.The useful elements in the ore are lead and zinc,which contain 1.63%and 1.72%respectively,and the contents of the associated precious metal silver is about 46.31 g/t,besides the harmful element content is 0.34%.The proportion of+0.105 mm galena and sphalerite are 73.56%and 79.2%respectively,which belong to the category of medium particle size distribution.As a whole,galena,and sphalerite and other minerals are mainly inlaid adjacently to each other,besides a small amount of galena and sphalerite are replaced along the cracks or interparticle of pyrite,pyrrhotite,arsenopyrite,chalcopyrite and other minerals,forming a more complex inlay relationship,which may cause galenite-arsenopyrite and sphalerite-arsenopyrite congeners to enter the lead concentrate or zinc concentrate,leading the concentrates and zinc concentrate contain high arsenic.

关 键 词：铅锌矿 砷 银 工艺矿物学 矿物组成 嵌布特征 铅精矿 锌精矿 

分 类 号：TD912[矿业工程—选矿] TD913