Bacterial leaching of chalcopyrite and bornite with native bioleaching microorganism  

作　　者：王军 覃文庆 张雁生 杨聪仁 张建文 赖绍师 尚鹤 邱冠周 

机构地区：[1]Key Laboratory of Biometallurgy of Ministry of Education,School of Minerals Processing and Bioengineering,Central South University

出　　处：《中国有色金属学会会刊：英文版》2008年第6期1468-1472,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(50621063)supported by the National Natural Science Foundation of China;Project(2004CB619205)supported by the National Basic Research Program of China;Project(2OO7AA060902)supported by the High-tech Research and Development Program of China

摘　　要：A native mesophilic iron-oxidizing bacterium,Acidithiobacillus ferrooxidans,has been isolated(30℃)from a typical, lead-zinc concentrate of Dachang Mine in the region of Liuzhou located in the southwest of China.Two typical copper sulfide minerals,chalcopyrite and bomite,were from Meizhou Copper Mine in the region of Guangdong Province,China.Variation of pH and cell growth on time and effects of some factors such as temperature,inoculation cell number,and pulp density on the bioleaching of chalcopyrite and bomite were investigated.The results obtained from the bioleaching experiments indicate that the efficiency of copper extraction depends on all of the mentioned variables,especially the pulp density has more effect than the other factors on the microorganism.In addition,the results show that the maximum copper recovery was achieved using a mesophilic culture.The copper dissolution reached 51.34% for the chalcopyrite while it was 72.35% for the bornite at pH 2.0,initial Fe(II)concentration 9 g/L and pulp density 5%,after 30 d.A native mesophilic iron-oxidizing bacterium, Acidithiobacillus ferrooxidans, has been isolated （30 ℃） from a typical, lead-zinc concentrate of Dachang Mine in the region of Liuzhou located in the southwest of China. Two typical copper sulfide minerals, chalcopyrite and bornite, were from Meizhou Copper Mine in the region of Guangdong Province, China. Variation of pH and cell growth on time and effects of some factors such as temperature, inoculation cell number, and pulp density on the bioleaching of chalcopyrite and bornite were investigated. The results obtained from the bioleaching experiments indicate that the efficiency of copper extraction depends on all of the mentioned variables, especially the pulp density has more effect than the other factors on the microorganism. In addition, the results show that the maximum copper recovery was achieved using a mesophilic culture. The copper dissolution reached 51.34% for the chalcopyrite while it was 72.35% for the bornite at pH 2.0, initial Fe（ Ⅱ ） concentration 9 g/L and pulp density 5%, after 30 d.

关 键 词：斑铜矿 黄铜矿 氧化亚铁 生物浸取 

分 类 号：TF18[冶金工程—冶金物理化学]