Hydronium jarosite formation and iron balance in bioheapleaching of Zijinshan copper sulphide

摘要：

The influence of temperature, pH and iron concentration on hydronium jarosite formation was investigated through the thermodynamic analysis and kinetic experiments based on the bioheapleaching system of Zijinshan copper mine. The comprehensive analysis of XRD, TG - DTG and SEM showed hydronium jarosite with great crystal structure was formed in the leaching solution. The analysis of thermodynamics suggested temperature, pH and iron concentration were important factors of hydronium jarosite formation, and among them temperature was the key factor. Kinetic experiments of hydronium jarosite formation also indicated that pH, iron concentration and temperature played an important role for the hydronium jarosite formation. Elevated temperature could accelerate the kinetics of hydronium jarosite formation and increase copper extraction. The results indicate that hydronium jarosite could be readily formed to remove iron in the bioheapleaching system of Zijinshan copper mine under leaching environment of TFe 50 g/L, pH 0. 8 - 1. 0 and 45 - 601.

关键词： hydronium jarosite thermodynamic analysis formation kinetics iron balance bioheapleaching

作者: Renman Ruan Gang Zou Tao Xu Xingyu Liu Shuiping Zhong Xiuzhu Su

作者单位: Zijin Mining Group Co. , Ltd, 364200, Shanghang, China School of Minerals Processing and Bioengineer Zijin Mining Group Co. , Ltd, 364200, Shanghang, China Zijin Mining Group Co. , Ltd, 364200, Shanghang, China National Engineering Laboratory of Biohydrome

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: 622-628

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）