Bioleaching of low-grade copper sulfide ores by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans  

作　　者：王军 朱珊 张雁生 赵红波 胡明皓 杨聪仁 覃文庆 邱冠周 

机构地区：[1]Key Laboratory of Biohydrometallurgy of Ministry of Education (Central South University) [2]School of Minerals Processing & Bioengineering,Central South University

出　　处：《Journal of Central South University》2014年第2期728-734,共7页中南大学学报（英文版）

基　　金：Project(2012AA061501)supported by the National High-tech Research and Development Program of China;Project(20120162120010)supported by the Research Fund for the Doctoral Program of Higher Education of China;Project(NCET-13-0595)supported by the program for New Century Excellent Talents in University of China;Project(51374248)supported by the National Natural Science Foundation of China;Project(2010CB630905)supported by the National Key Basic Research Program of China

摘　　要：The grown conditions of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans were investigated,and then experiments were conducted to research the bioleaching behaviors of crude ore of copper sulfide and hand-picked concentrates of chalcopyrite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans.The experimental results show that the bacteria grow best when the temperature is(30±1) °C and the pH value is 2.0.The bacteria concentration is 2.24×107 mL-1 in this condition.It is found that the copper extraction yield is affected by the inoculum size and the pulp density and the extraction yield increases as the inoculum size grows.The bioleaching rates reach their highest point in sulfide copper and chalcopyrite with a pulp density of 5% and 10%,respectively.Column flotation experiments of low-grade copper sulfide ores show that the bioleaching recovery reaches nearly 45% after 75 days.The grown conditions of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans were investigated,and then experiments were conducted to research the bioleaching behaviors of crude ore of copper sulfide and hand-picked concentrates of chalcopyrite by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans.The experimental results show that the bacteria grow best when the temperature is（30±1） °C and the pH value is 2.0.The bacteria concentration is 2.24×107 mL-1 in this condition.It is found that the copper extraction yield is affected by the inoculum size and the pulp density and the extraction yield increases as the inoculum size grows.The bioleaching rates reach their highest point in sulfide copper and chalcopyrite with a pulp density of 5% and 10%,respectively.Column flotation experiments of low-grade copper sulfide ores show that the bioleaching recovery reaches nearly 45% after 75 days.

关 键 词：BIOHYDROMETALLURGY CHALCOPYRITE Acidithiobacillus ferrooxidans Acidithiobacillus thiooxidans copper sulfide ore 

分 类 号：TD95[矿业工程—选矿]