(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)
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。
关键字: 含砷石灰铁盐渣；氨浸法；浸出动力学；铜
（1. Institute of Environment Engineering and Science, South Central University for Nationalities, Wuhan 430074, China;
2. Key Laboratory of Catalysis and Materials Science of State Ethnic Affairs Commission, Ministry of Education,
School of Chemistry and Materials Science, South Central University for Nationalities, Wuhan 430074, China）
Abstract: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.
Key words: As-contained solid waste; ammonia leaching method; leaching kinetics; copper
