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
Key words
lead zinc ore/arsenic/silver/process mineralogy/mineral composition/embedding characteristics/lead concentrate/zinc concentrate
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