低温下氧化亚铁硫杆菌浸出黄铜矿  

Thiobacillus ferrooxidans bioleaching of chalcopyrite at low temperature

作　　者：张德诚[1] 朱莉[1] 罗学刚[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《化工进展》2008年第1期125-130,共6页Chemical Industry and Engineering Progress

基　　金：国家科技支撑计划项目课题资助(2007BAB18806)

摘　　要：使用中温菌氧化亚铁硫杆菌(Thiobacillus ferrooxidans)在低温条件(8～10℃)下浸出黄铜矿。结果表明:经过90d的低温摇瓶浸出后,在无菌硫酸浸出过程中,黄铜矿可以自发氧化分解,最终浸出率为16.08%;在无菌高铁硫酸浸出过程中,由于Fe3+起到了一定的氧化作用,最终浸出率为21.3%;在有菌浸出过程中,氧化亚铁硫杆菌在低温下的浸出率可达37.96%。氧化亚铁硫杆菌在低温下浸出黄铜矿的最适pH值为2.0,在接种量为10%,矿石粒径为0.16 mm,矿浆浓度为2%时较为适宜。在低温浸出的初始阶段,当添加Fe2+的量为6 g/L时能促进浸出率提高最大,最终可达到53.51%。Bioleaching of chalcopyrite with mesophile Thiobacillus ferrooxidans was performed at a low temperature （8 - 10℃）. The results showed that the leaching rate of chalcopyrite for copper in sulfuric acid medium in 90 days was only 16.08%, the leaching rate in ferric sulfate medium was 21.3%, but for bioleaching it was as high as 37.96%. The optimal conditions for chalcopyrite bioleaching with Thiobacillus ferrooxidans were pH 2.0, 10% inoculation, 100 mesh ore size, 2% slurry concentration. At the initial stage of the bioleaching process, adding 6g/L Fe^2＋ would greatly enhance bioleaching rate for copper to 53.51%.

关 键 词：低温 细菌浸出 黄铜矿 氧化亚铁硫杆菌 

分 类 号：TF18[冶金工程—冶金物理化学] TF81