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中南大学学报(自然科学版)

Journal of Central South University

第42卷    第5期    总第201期    2011年5月

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文章编号:1672-7207(2011)05-1181-07
不同能源物质对At.f菌浸出低品位铜尾矿的影响
董颖博,林海,莫晓兰,傅开彬

(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)

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%。

 

关键字: At.f  LD-1菌株;硫酸亚铁;硫代硫酸钠;黄铁矿;铜尾矿;浸出

Effect of different energy sources on At.f bacterial leaching of
low-grade copper tailings
DONG Ying-bo, LIN Hai, MO Xiao-lan, FU Kai-bin

Key Laboratory of Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines, School of Civil & Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China

Abstract: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.

 

Key words: At.f  LD-1; ferrous sulfate; sodium thiosulfate; pyrite; copper tailing; leaching

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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