低品位原生金矿的生物柱浸  

Column Bioleaching of Low-Grade Primary Gold Ore

作　　者：马鹏程[1] 杨洪英[1] 韩战旗[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2012年第6期857-861,共5页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2009AA06Z104);国家自然科学基金资助项目(50874030;51174062);国家"十一五"科技支撑计划项目(2008BAB34B01)

摘　　要：采用粘结剂S-11将某低品位原生金矿的精矿粘结包裹在其原矿矿石上进行生物柱浸与原矿生物柱浸的对比研究.主要研究了生物柱浸过程中Fe2+浓度,pH,Eh,矿石表面吸附的细菌及菌液中游离细菌数量的变化、矿石的脱砷率、脱硫率,生物柱浸后矿石金的氰化浸出率.结果表明:金精矿包裹后的矿石表面因含硫化矿物较多,更适合细菌的吸附与繁殖;包裹生物柱浸120 d后矿石的脱砷率为70.14%,脱硫率为41.26%,金的氰化浸出率为81.21%,比传统生物柱浸矿石的脱砷率、脱硫率和浸金率分别高24.01%,19.11%和21.48%.包裹生物柱浸对矿石的氧化效果明显.S-11 adhesive was used to paste gold concentrate around low-grade primary ore and the column bioleaching was compared with traditional column bioleaching. The concentration of Fe2＋ , pH, Eh, attached bacteria concentration on the surface of ore, free bacteria concentration in leaching solution, oxidation rates of arsenic and sulfur and cyaniding leaching efficiency were measured. The results show that it is better for bacterial reproduction when a coating of gold concentrate is pasted on the low-grade primary ore. The oxidation rate of arsenic is 70.14%, oxidation rate of sulfur is 41.26 %, and cyaniding leaching efficiency is 81.21% after 120 days by column bioleaching. The rates are 24.01%, bioleaching, respectively. 19.11% and 21.48 % higher than traditional column

关 键 词：生物氧化 低品位原生金矿 生物柱浸 氰化提金 

分 类 号：TF831[冶金工程—有色金属冶金]