高砷金精矿工艺矿物学和细菌氧化  

PROCESS MINERALOGY AND BACTERIA OXIDATION OF HIGH ARSENIC GOLD CONCENTRATES

作　　者：杨洪英[1] 杨立[1] 魏绪钧[1] 孙铭[2] 

机构地区：[1]东北大学,沈阳110006 [2]北京联合大学,北京100013

出　　处：《有色金属》2000年第4期64-67,共4页Nonferrous Metals

基　　金：国家自然科学基金!(5 0 0 740 15 )

摘　　要：采用经长期驯化耐砷的氧化亚铁硫杆菌SH -T菌株对某高砷金精矿进行氧化预处理。金精矿中有害杂质砷的含量达 17 7%～ 2 5 8% ,金属硫化物以毒砂为主 ,含量达 6 0 %～ 70 %。金以次显微状赋存于毒砂和黄铁矿之中。采用常规氰化工艺金的浸出率还不到 3%。金精矿经细菌氧化处理后 ,取得了较好的脱砷效果。矿浆浓度为 5 % ,经 13天的细菌氧化试验脱砷率可达 90 %以上。与常规氰化工艺相比 ,经 7天细菌氧化金浸出率提高 2High arsenic gold concentrates were pretreated by bacterial oxidation with domesticated arsenic resisting Thiobacillus ferrooxidans SH T The gold concentrates contain detrimental impurity As 17 7%～25 8% Arsenopyrite is in majority and represents 60%～70% in metal sulfides Gold exists as submicroscopic particles in arsenopyrites and pyrites The leaching rate of gold was less 3% by the current cyanidation process After gold concentrates were oxidized with Thiobacillus ferrooxidans SH T, better arsenic removal could be gained In a 13 day bacterial oxidation test the arsenic removal reached over 90% at a pulp density of 5% As compared with the conventional cyanidation process, the leaching rate of gold increased by a factor of 26 by SH T bacterial oxidation

关 键 词：高砷金精矿 工艺矿物学 细菌氧化 脱砷 

分 类 号：TD953[矿业工程—选矿] TF831.032[冶金工程—有色金属冶金]