催化剂组合对低品位原生硫化铜矿细菌浸出的催化效应  

Catalytic effect of the Combination of Catalysts on Bioleaching of Low-grade Primary Copper Sulfide Ore

作　　者：张卫民[1,2] 谷士飞 孙占学[1,2] 

机构地区：[1]核资源与环境教育部重点实验室(东华理工大学),江西南昌330013 [2]东华理工大学土木与环境工程学院,江西抚州市344000 [3]广西壮族自治区地质环境总站,广西桂林市541004

出　　处：《矿业研究与开发》2009年第2期45-48,共4页Mining Research and Development

基　　金：科技部国际合作项目(2008DFA71760);江西省教育厅重点科技资助项目(GJJ08294)

摘　　要：通过摇瓶实验,研究了活性炭、Ag^＋及Fe^2＋组合对低品位原生硫化铜矿细菌浸出的催化效应。研究表明：在细菌浸出的初始阶段,添加活性炭、Ag^＋及Fe^2＋组合可以进一步提高铜的浸出速度及浸出率,其浸出效果比单独添加活性炭或Ag＋要好,其中浸出效果最好的是3.0 g/L活性炭＋2.0mg/L Ag^＋ ＋8.0 g/L Fe^2＋组合,在浸出168 h后,铜的浸出率可达到83%,其次是3.0 g/L活性炭＋2.0 mg/L Ag^＋组合,浸出310 h后,铜的浸出率可达到80%。而单独添加3.0g/L活性炭或2.5 mg/L Ag^＋,在浸出310 h时,铜的浸出率分别为62%和20%。控制550-640 mV的低氧化还原电位条件有利于细菌浸出低品位原生硫化铜矿中的铜。Through shaking flasks experiment, the catalytic effect of the combination of activated carbon, Ag^＋ and Fe^2＋ on improving the bioleaching efficiency of the low - grade primary copper sulfide ores from Yongping Copper Mine was investigated. The results showed that the addition of the combination of activated carbon, Ag^＋ and Fe^2＋ could further accelerate the dissolution velocity and rate of copper at the initial stage of the bioleaching, and the leaching effect was better than that achieved when only activated carbon or silver ion was added. The best leaching result could be achieved under a combination of 3.0 g/L activated carbon and 2.0 mg/L silver ion and 8.0 g/L ferrous ion, in this case, the leaching rate of copper reached 83% after 168 h bioleaching. When the combination of 3.0 g/L activated carbon and 2.0 mg/L silver ion was used, the leaching rate of copper reached 80% after 310 h bioleaching. The leaching rate of copper was only 62% and 20% respectively when only 3.0 g/L activated carbon or 2.5 mg/L silver ion was added. It was found that it is more favorable to the bioleaching of copper from low - grade primary copper sulfide ores if the low redox potential is controlled at 550 -640 mV.

关 键 词：细菌浸出 低品位原生硫化铜矿 活性炭 银离子 催化效应 

分 类 号：TD853.37[矿业工程—金属矿开采]