Authors: Jun Wang Shan Zhu Yansheng Zhang Hongbo Zhao Minghao Hu Congren Yang Wenqing Qin Guanzhou Qiu
Publish Date: 2014/02/21
Volume: 21, Issue: 2, Pages: 728-734
Abstract
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 handpicked 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 20 The bacteria concentration is 224×107 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 lowgrade copper sulfide ores show that the bioleaching recovery reaches nearly 45 after 75 daysFoundation item Project2012AA061501 supported by the National Hightech Research and Development Program of China Project20120162120010 supported by the Research Fund for the Doctoral Program of Higher Education of China ProjectNCET130595 supported by the program for New Century Excellent Talents in University of China Project51374248 supported by the National Natural Science Foundation of China Project2010CB630905 supported by the National Key Basic Research Program of China
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