Leaching of Copper Concentrate with Moderate Thermophile Bacteria in Batch Culture
A moderate thermophilic microorganisms, has been isolated (45℃) from a typical sulphide mine in the region of Mo Jiang located in the southwest of China. The culture has been used to extract copper from chaicopyrite concentrates obtained from De Xing copper mine. The majority of experiments were carried out in 300mL Erlenmeyer flasks containing 150mL volumes of mineral suspension. Effects of some variable parameters such as solids concentration, pH and the concentrations of inorganic nutrients on the bioleaching of chalcopyrite obtained from De Xing copper mine were investigated. For a given concentrate the most important factor affecting the fractional copper extraction was the size of the mineral particles. The overall rate of leaching was found to be limited by the area of mineral surface. The attack started in cracks and genetic defects and finally reached the whole chalcopyrite surface. As a consequence of this, the ore showed strongly cracks. The additive of ferrous sulfate increases the bacteria activity, but did not improve chalcopyrite bioleaching.The results indicate that the nature and relative proportions of the various minerals present have been shown to be important factors.
Bioleaching Copper ore Bio-hydrometallurgy
R. B. Shu J. K. Wen J. G. Xu
National Engineering Laboratory of Biohydrometallurgy General Research Institute for Nonferrous Metals, Beijing, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2789-2793
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）