pH值对浸矿细菌的活化以及金精矿脱砷的影响  

Effect of pH Value on Activation of Bioleaching Bacteria and Dearsenification of Gold Ore Concentrates

作　　者：崔日成[1] 杨洪英[1] 张谷平[2] 范金[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]东北大学理学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第11期1597-1600,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50674029);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：通过在摇瓶中设定6个不同初始pH值梯度1.3,1.5,1.7,1.8,1.9,2.1,对细菌的活化以及高砷金精矿的脱砷浸出进行了研究.细菌活化阶段,HQ-0211菌在pH值1.3-1.9范围更加适应,活化速度快,氧化效果好。高砷金精矿细菌脱砷阶段,初始pH值在1.7-1.9范围最利于细菌浸矿,停滞期短,氧化速度快。初始pH值较高,为2.1时,细菌会较快进入衰亡期,不适于细菌浸矿。初始pH值较低,为1.3-1.5时,细菌适应停滞期长,氧化脱砷速度缓慢。The activation of bacteria and dearsenification of high-As gold ore concentrates for leaching were studied experimentally the way there were six different initial pH gradients set in shaking flasks, i.e. , 1.3, 1.5, 1.7, 1.8, 1.9 and 2.1. In the phase of bacterial activation, the bacteria HQ-0211 in the range from 1.3 to 1.9 are more adaptable to activate faster with better oxidation effect. In the phase of dearsenification of high-As gold ore concentrates, the optimum initial pH value for bioleaching is in the range from 1.7 to 1.9, with short stagnation and fast oxidation. When the pH value becomes higher, e.g. , up to 2.1, the bacteria will quickly come into their decline phase, so unavailable to bioleaching. With the lower initial pH value in the range from 1.3 to 1.5, the bacteria will fit the long stagnation phase with slow oxidation/ dearsenification.

关 键 词：浸矿细菌 活化作用 高砷金精矿 HQ-0211菌 脱砷 

分 类 号：TF831[冶金工程—有色金属冶金]