铜镍尾矿细菌浸出的试验研究  

Experimental Investigation on Bio-leaching Cu-Ni Ore Tailings

作　　者：俞娟[1] 杨洪英[1] 佟琳琳[1] 陈森[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第12期1746-1749,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(5067402950274024);国家高技术研究发展计划项目(2006AA06Z127);教育部高等学校博士学科点专项科研基金资助项目(20060145015);辽宁省自然科学基金资助项目(20052030)

摘　　要：通过正交试验研究了pH值、矿浆质量分数、矿石粒度、细菌接种量、表面活性剂吐温20用量对铜镍矿尾矿细菌浸出的影响.试验结果表明,铜浸出的最佳条件:pH值为1.5,矿石粒度为小于0.074 mm,接种量(体积分数)为50%以及不添加表面活性剂;镍浸出的最佳条件:pH值为1.0,矿石粒度为大于0.147mm,接种量(体积分数)为25%及不添加表面活性剂.细菌氧化后,铜和镍的浸出率分别达到63.41%和91.74%.The effects of pH value, mass fraction of pulp, ore particle size, inoculation concentration and dose of the surfactant Tween 20 on the bio-leaching rates of copper and nickel in Cu-Ni ore tailings were investigated through orthogonal test. The experimental results showed that the optimum conditions for copper extraction by bio-oxidation of Cu-Ni ore railings are pH value 1.5, particle size less than 0.074mm, inoculation concentration 50%, with no use of the surfactant Tween 20. And the optimum conditions for nickel extraction are pH value 1.0, particle size bigger than 0. 147 mm, inoculation concentration 25 %, with no use of the surfactant Tween 20. The copper and nickel leaching rates are thus up to 63.41% and 91.74 %, respectively, after bio-oxidation.

关 键 词：尾矿 铜镍矿 细菌浸出 浸出率 铜 镍 正交试验 

分 类 号：TF81[冶金工程—有色金属冶金]