Comparison on the leaching kinetics of chalcocite and pyrite with or without bacteria

作     者：RUAN Renman ZHOU E LIU Xingyu WU Biao ZHOU Guiying WEN Jiankang 

作者机构：School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China Zijin Mining Group Co.Ltd.Shanghang 364200China Institute of Process EngineeringChinese Academy of SciencesBeijing 100090China National Engineering Laboratory of BiohydrometallurgyGeneral Research Institute for Nonferrous MetalsBeijing 100088China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2010年第29卷第6期

页      面：552-556页

核心收录：

学科分类：081702[工学-化学工艺] 080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 

基　　金：financially by the Major State Basic Research Development Program of China (No.2004CB619206) the Natural Science Foundation of Fujian Province,China (No.2010J05158) 

主　　题：chalcocite pyrite kinetic model bioleaching 

摘      要：The acid leaching,ferric leaching,and bioleaching of chalcocite and pyrite minerals were conducted in two sets of 3L stirred *** dissolution rates of copper and iron were correlated with leaching *** the acid leaching process,the dissolution rate of chalcocite was around 40wt.% while that of pyrite was less than 4%.In the ferric leaching process with high ferric concentration,only 10 wt.% of iron in pyrite was leached out at the same retention time though the copper recovery over 60 wt.% in *** the bioleaching process,the chalcocite leaching rate was highly increased,nearly 90 wt.% of copper was leached out,and the iron dissolution of pyrite exceeded 70 wt.%.For the two minerals,the bioleaching shows the highest leaching rate compared with the acid leaching or ferric *** uncontrolled bioleaching process,pyrite could be dissolved *** experimental data were fitted to the shrinking core and particle *** results show that in all the leaching tests,the chalcocite leaching was mainly controlled by diffusion,while for the pyrite leaching,chemical reaction is the main rate-determining step.