Silver-catalyzed bioleaching for raw low-grade copper sulphide ores  

作　　者：Tianlong DENG Yafei GUO Mengxia LIAO Dongchan LI 

机构地区：[1]College of Materials,Chemistry and Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China [2]Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China

出　　处：《Frontiers of Chemical Science and Engineering》2009年第3期250-254,共5页化学科学与工程前沿（英文版）

基　　金：Financial contributions from the National Natural Science Foundation of China(Grant Nos.20776019 and 40573044);the“A Hundred Talents Program”of the Chinese Academy of Sciences(No.0560051057);the Key Program of Department of Education of Sichuan Government(No.2004A146);the Applied Basic Research Program of Sichuan Government(Nos.05JY029-089-1,05JY029-089-2)are acknowl-edged.

摘　　要：This research was conducted to investigate the biooxidation and copper dissolution from raw low-grade refractory copper sulphide ores located in the Xinjiang Autonomous Region of China using adapted Thiobacillus ferrooxidans bacteria.In order to accelerate the bioleach-ing rate,the adapted mixed bacteria and silver ion catalyst were tested in the leach columns at laboratory scale.The overall acid consumption was 4.3kg sulphuric acid per kg of dissolved copper and was linearly related to the percent copper dissolution.The calculated copper dissolution rates obey the Shrinking Core Model.The relative activation energy of the whole biooxidative leaching stages was calculated to be 48.58kJ/mol.

关 键 词：green process BIOHYDROMETALLURGY bioleach-ing reaction kinetics sulphide ores 

分 类 号：F42[经济管理—产业经济]