微生物浸出中原生硫化矿的铜浸出率与时间相关性研究  

Study on Correlation of Copper Leaching Rate of Primary Sulfide Ore and Leaching Time During Microbial Leaching

作　　者：江怀春[1] 吴爱祥[1] 王贻明[1] 张杰[1] 

机构地区：[1]中南大学资源与安全工程学院

出　　处：《矿业快报》2007年第9期11-14,共4页Express Information of Mining Industry

基　　金：973国家重点基础研究发展规划项目(2004CB619200);国家杰出青年基金项目(50325415);国家创新群体项目(50321402)

摘　　要：通过室内摇瓶浸出试验,研究了不同粒级的原生硫化矿石铜的浸出率与时间的相关性。结果表明:采用液固比10:1,pH<2.0的微生物浸出此类矿石,可以得到较好的浸出效果,总浸出率能达到32.6%。浸出液pH值在反应前30d逐渐上升,之后基本保持稳定;浸出液中溶解氧、菌种浓度等呈上升趋势。浸取液中的Cu2+浓度逐渐升高,粒径最小的矿样其浓度最大,浸出效果最好。浸取液中的TFe离子浓度呈上升趋势,反应从第10～30d,浓度趋于平缓,30d之后,反应加剧,浓度上升较快。铜的浸出率与浸出反应时间呈一次线性关系递增,相关系数R保持在0.95以上,其曲线拟合得很好。Through the indoor shaking flask leaching experiment, the correlation of copper leaching rate and leaching time of primary sulphide ore with different size fractions was studied. The results indicated that using microorganism to leach this kind of sulphide copper ore may achieve good leaching effect when pH was 〈 2.0 and liquid-solid ratio was 10 ： 1, and the final copper leaching rate could reach 32. 6%. The pH value of lixivium rose gradually in the initial 30 days of leaching and then kept stable basically. The concentration of dissolved oxygen and bacteria tended to increase continually. The concentration of Cu2 ＋ in lixivium rose gradually, while the smallest size ore had the largest Cu2＋ concentration and the best leaching effect. The TFe ion concentration in lixivium assumed upward trend. The concentration became moderate from 10 days to 30 days after reaction began and the concentration rose quickly after 30 days when the reaction intensified. The copper leaching rate and reaction time assumed an incremental linear relationship. The correlation coefficient R maintained above 0.95 and the curve fitted well.

关 键 词：原生硫化铜 铜浸出率 相关性 微生物浸出 

分 类 号：TF18[冶金工程—冶金物理化学]