Dissolution kinetics of low grade complex copper ore in ammonia-ammonium chloride solution  

作　　者：刘维 唐谟堂 唐朝波 何静 杨声海 杨建广 

机构地区：[1]School of Metallurgical Science and Engineering,Central South University

出　　处：《Transactions of Nonferrous Metals Society of China》2010年第5期910-917,共8页中国有色金属学报（英文版）

基　　金：Projects(2007CB613604) supported by the National Basic Research Program of China;Project(50674104) supported by the National Natural Science Foundation of China

摘　　要：The leaching kinetics of Tang-dan refractory low grade complex copper ore was investigated in ammonia-ammonium chloride solution.The concentration of ammonia and ammonium chloride,the ore particle size,the solid-to-liquid ratio and the temperature were chosen as parameters in the experiments.The results show that temperature,concentration of ammonia and ammonium chloride have favorable influence on the leaching rate of copper oxide ores.But,leaching rate decreases with increasing particle size and solid-to-liquid ratio.The leaching process is controlled by the diffusion of the lixiviant and the activation energy is determined to be 23.279 kJ/mol.An equation was also proposed to describe the leaching kinetics.The leaching kinetics of Tang-dan refractory low grade complex copper ore was investigated in ammonia-ammonium chloride solution.The concentration of ammonia and ammonium chloride,the ore particle size,the solid-to-liquid ratio and the temperature were chosen as parameters in the experiments.The results show that temperature,concentration of ammonia and ammonium chloride have favorable influence on the leaching rate of copper oxide ores.But,leaching rate decreases with increasing particle size and solid-to-liquid ratio.The leaching process is controlled by the diffusion of the lixiviant and the activation energy is determined to be 23.279 kJ/mol.An equation was also proposed to describe the leaching kinetics.

关 键 词：leaching kinetics AMMONIA ammonium chloride low grade copper ore 

分 类 号：X703[环境科学与工程—环境工程]