Bacterial leaching of chalcopyrite and bornite withnative bioleaching microorganism

来源期刊:中国有色金属学报(英文版)2008年第6期

论文作者:王军 覃文庆 张雁生 杨聪仁 张建文 赖绍师 尚鹤 邱冠周

文章页码:1468 - 1472

Key words:bornite; Acidithiobacillus ferrooxidans; bioleaching; chalcopyrite

Abstract: 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.

基金信息:the Chinese Science Foundation for Distinguished Group
the National Basic Research Program of China
High-tech Research and Development Program of China

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