氨浸法从含砷石灰铁盐渣中回收铜的动力学  

Kinetics of copper recovery from As-contained solid waste by ammonia leaching method

作　　者：倪冲[1,2] 赵燕鹏[1,2] 阮福辉[1,2] 卢娜[1,2] 杜冬云[1,2] 

机构地区：[1]中南民族大学环境科学与工程研究所,武汉430074 [2]中南民族大学化学与材料科学学院催化材料科学国家民委-教育部共建重点实验室,武汉430074

出　　处：《中国有色金属学报》2013年第6期1769-1774,共6页The Chinese Journal of Nonferrous Metals

基　　金：武汉市重点科技攻关资助项目(201160638173)

摘　　要：以氨浸法从含砷石灰铁盐渣中回收铜,研究从该类废渣中回收铜的可行性、工艺条件和动力学。结果表明：氨水和碳酸铵组成的浸取体系为适宜的浸取剂,当总氨浓度为5 mol/L、与铵盐浓度比为2：3、液固比为4：1时,铜的浸出率达到60.80%。动力学研究表明：铜的浸出过程在288~328 K内符合＂未反应核缩减＂模型,浸出过程主要受内扩散步骤控制,经拟合获得浸出动力学方程,浸出表观活化能为41.12 kJ/mol。Copper was recovered from solid waste with arsenic by ammonia leaching method.The possibility of recovering copper,the optimal conditions and the kinetics from solid waste with arsenic by ammonia leaching method were investigated.The results show copper recovery rate achieve about 60.80% in a system composed of ammonia and ammonium carbonate with the total ammonia concentration of 5 mol/L,c（NH3）：c（NH4＋） of 2：3,L/S ratio of 4：1.Kinetics studies indicate that the leaching process follows the shrinking-core model in the temperature ranging from 288 K to 328 K,the leaching rate of copper is controlled by the inner diffusion of reactants during the leaching process,the leaching kinetics equation is established,and the apparent activation energy is 41.12 kJ/mol.

关 键 词：含砷石灰铁盐渣 氨浸法 浸出动力学 铜 

分 类 号：TF803.21[冶金工程—有色金属冶金] X758[环境科学与工程—环境工程]