不同能源物质对At.f菌浸出低品位铜尾矿的影响  

Effect of different energy sources on At.f bacterial leaching of low-grade copper tailings

作　　者：董颖博[1] 林海[1] 莫晓兰[1] 傅开彬[1] 

机构地区：[1]北京科技大学土木与环境工程学院金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《中南大学学报（自然科学版）》2011年第5期1181-1187,共7页Journal of Central South University:Science and Technology

基　　金：北京市教育委员会共建项目(XK100080432)

摘　　要：以嗜酸氧化亚铁硫杆菌LD-1菌株(At.f LD-1)为研究对象,研究硫酸亚铁、硫代硫酸钠和黄铁矿3种能源物质对At.f LD-1菌株浸出低品位铜尾矿浸出体系及铜浸出效率的影响。研究结果表明:At.f LD-1菌株浸出铜尾矿初期加入适量的硫酸亚铁、硫代硫酸钠、黄铁矿均能提高铜的浸出效率,其中以硫代硫酸钠的效果最为显著;初始加入二价铁质量浓度为5 g/L时浸出效果较好,46 d铜浸出率达35.00%,与不加硫酸亚铁的相比提高13.63%;硫代硫酸钠中S质量浓度为1 g/L时浸铜效果最好,46 d铜的浸出率达到38.10%,与不加硫代硫酸钠的相比提高23.70%;加入黄铁矿对提高铜浸出率也能起到促进作用,浸出46 d后铜浸出率达34.17%,与不加黄铁矿时相比提高11.00%。The effect of different energy sources on bio-leaching of the low-grade copper tailings was studied with strain Acidthiobacillus ferrooxidans （At.f） LD-1. The results show that ferrous sulfate, sodium thiosulfate and pyrite can improve the efficiency of copper leaching. When the initial mass concentration of ferrous is 5 g/L, the copper leaching rate reaches 35.00% after 46 d leaching, 13.63% higher than that without ferrous sulfate. When sodium thiosulfate is added with 1 g/L of initial S mass concentration, the copper leaching rate reaches the highest value of 38.10% after 46 d leaching. It is improved by about 23.70% compared with the copper leaching rate without sodium thiosulfate. Pyrite is also able to enhance the effect of copper leaching. The copper leaching rate reaches 34.17% after 46 d leaching, 11.00% higher than that without pyrite.

关 键 词：At.f LD-1菌株 硫酸亚铁 硫代硫酸钠 黄铁矿 铜尾矿 浸出 

分 类 号：TD925.5[矿业工程—选矿]