Bioleaching of flotation chalcopyrite concentrate by a moderately thermophilic enrichment

摘要：

A mixed culture of moderately thermophiles was enriched at 451 from several acid mine drainage ( AMD) samples collected from copper mines in China. A preliminary study suggested that the mixed culture could extract copper from chalcopyrite effectively. Effects of initial pH, value pulp density, temperature and rotation rate on chalcopyrite dissolution were investigated by a series of bioleaching experiments. All experiments were carried out in 250 mL batch shake flasks. The pH, Eh, concentrations of copper, ferrous ion, ferric ion and cells were monitored. The results showed that initial pH, temperature and rotation rate were the significantly influencing factors. Comparing with others factors, although pulp density had less effect, the extraction rates would decrease obviously when pulp density was too high or low. Under the optimum condition of initial pH 1.5, temperature 451, pulp density 2％ and rotation rate 200 rpm, 90. 9％ of copper was extracted within 15 days.

关键词： moderately thermophiles bioleaching flotation chalcopyrite concentrate optimum conditions

作者: Yuguang Wang Hongbo Zhou Lijuan Zhang

作者单位: School of Minerals Processing and Bioengineering, Central South University,Changsha, 410083, China School of Minerals Processing and Bioengineering, Central South University,Changsha, 410083, China

会议类型: 国际会议

会议名称: The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)

会议地点: 长沙

会议语种:英文

页码: 871-877

在线出版日期: 2011-09-18（万方平台首次上网日期，不代表论文的发表时间）