Optimization of copper extraction for bioleaching of complex Cu-polymetallic concentrate by moderate thermophiles  

中度嗜热微生物浸出复杂多金属铜精矿的优化(英文)

作　　者：王玉光[1] 苏丽君[2] 曾伟民[1,3] 邱冠周[1,3] 万利利[1] 陈新华[4] 周洪波[1,3] 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083 [2]长沙医学院医学检验系,长沙410219 [3]中南大学生物冶金教育部重点实验室,长沙410083 [4]国家海洋局海洋生物遗传资源重点实验室,厦门361005

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第4期1161-1170,共10页中国有色金属学报（英文版）

基　　金：Project (2012zzts026) supported by the Fundamental Research Funds for the Central Universities,China;Project (201205020) supported by Scientific Research Program of Marine Public Welfare Industry of China;Project (51074195) supported by the National Natural Science Foundation of China;Project (CX2012B123) supported by Research Innovation for Graduate Student of Hunan Province,China;Project (12C517) supported by Education Department of Hunan Province,China

摘　　要：Effects of initial pH, temperature, liquid volume, rotation speed, galvanic interaction （pyrite ratio） and pulp density on bioleaching of complex Cu-polymetallic concentrate were investigated. The results indicated that the copper extraction at pH 1.5 was 1.5 and 1.4 times that at pH 1.0 and pH 2.0 respectively. The copper extraction obtained at 45 ℃ was 1236.8%higher than that at 50 ℃. With the increase of rotation speed or the decrease of liquid volume, copper extraction was improved obviously. Copper extraction was improved gradually with the increase of pyrite ratio. However, when the ratio was higher than 20.0%, no further increase in copper extraction was observed. And the statistically significant interactive effects on copper extraction were found between temperature and pH, and temperature and pyrite ratio.研究了中度嗜热微生物浸出复杂多金属铜矿过程中初始pH、温度、装液量、转速、原电池效应(黄铁矿比例)和矿浆浓度的影响。结果表明,初始pH为1.5的铜浸出率分别是初始pH为1.0和2.0的实验组浸出率的1.5倍和1.4倍。当温度为45°C时铜的浸出率比温度为50°C时的高出1236.8%。随着转速的升高和装液量的降低,铜的浸出率明显提高。当黄铁矿的比例增大时,铜的浸出率也逐渐提高,但是当黄铁矿比例高于20.0%后,铜浸出率不再增加。温度和pH及温度和黄铁矿比例之间存在显著的交互作用。

关 键 词：moderate thermophiles BIOLEACHING complex Cu-polymetallic concentrate copper extraction optimization 

分 类 号：TF18[冶金工程—冶金物理化学]