Bioleaching and dissolution kinetics of pyrite,chalcocite and covellite  

黄铁矿、辉铜矿和铜蓝的生物浸出及其浸出动力学

作　　者：SHANG He GAO Wen-cheng WU Biao WEN Jian-kang 尚鹤;高文成;武彪;温建康(National Engineering Laboratory of Biohydrometallurgy,GRINM Group Co.,Ltd.,Beijing 100088,China;GRINM Resources and Environment Tech.Co.,Ltd.,Beijing 101407,China;GRIMAT Engineering Institute Co.,Ltd.,Beijing 101407,China;General Research Institute for Nonferrous Metals,Beijing 100088,China)

机构地区：[1]National Engineering Laboratory of Biohydrometallurgy,GRINM Group Co.,Ltd.,Beijing 100088,China [2]GRINM Resources and Environment Tech.Co.,Ltd.,Beijing 101407,China [3]GRIMAT Engineering Institute Co.,Ltd.,Beijing 101407,China [4]General Research Institute for Nonferrous Metals,Beijing 100088,China

出　　处：《Journal of Central South University》2021年第7期2037-2051,共15页中南大学学报（英文版）

基　　金：Project(51574036)supported by the National Natural Science Foundation of China。

摘　　要：In this work,the bioleaching process of pyrite,chalcocite and covellite which were the main phase compositions for Zijin copper mineral was comprehensively studied.The influence parameters,such as leaching temperature,Fe^(3+)concentration,pH of solution and bacteria concentration were investigated.The leaching kinetics of the pyrite,chalcocite and covellite under the studied conditions was successfully modeled by an empirical diffusion-like equation,respectively.The apparent activity energy of pyrite leaching,chalcocite leaching(stage Ⅱ)and covellite leaching was calculated to be 69.29,65.02 and 84.97 kJ/mol,respectively.研究紫金山铜矿主要矿物黄铁矿、辉铜矿和铜蓝,考察温度、细菌接种浓度、pH值和Fe^(3+)浓度等对矿物溶解动力学的影响,查明影响矿物溶解动力学的主要因素,获得控制氧化速率的关键步骤,建立半经验动力学模型,经计算,黄铁矿、辉铜矿和铜蓝在浸出过程中的表观活化能分别为69.29,65.02和84.97 kJ/mol。

关 键 词：PYRITE CHALCOCITE COVELLITE BIOLEACHING KINETICS 

分 类 号：TF111.31[冶金工程—冶金物理化学]