(1. 桂林理工大学 材料科学与工程学院 省部共建广西有色金属及特色材料加工国家重点实验室培育基地
广西矿冶与环境科学实验中心，桂林 541004；
2. 广西科学院 应用物理研究所，南宁 530000；
3. 桂林理工大学 环境科学与工程学院，桂林 541004；
4. 广西金山铟锗冶金化工有限公司，河池 547200；
5. 河池学院 化学与生物工程学院，宜州 546300；
6. 中国地质调查局 郑州矿产综合利用研究所，郑州 450000)
摘 要: 以浸出温度、NaCl浓度、颗粒粒度和液固比对铅浸出率影响的实验条件和数据为基础，建立NaCl-HCl体系，采用液-固多相反应的收缩核模型，系统分析了铅渣中铅的浸出动力学过程。结果表明：根据实验数据求出浸出反应的宏观动力学方程，计算得到表观活化能为45.239 kJ/mol，说明该体系浸出过程受表面化学反应控制；在实验选取的参数范围内，增大NaCl浓度、浸出温度和液固比以及减小颗粒粒度均有利于提高铅的浸出率。
关键字: NaCl-HCl体系；铅渣；铅；浸出；动力学
（1. Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment,
College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China;
2. Institute of Applied Physics, Guangxi Academy of Sciences, Nanning 530000, China;
3. College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China;
4. Guangxi Jinshan Indium and Germanium Chemical Metallurgy Co.Ltd., Hechi 547200, China;
5. College of Chemical and Biological Engineering, Hechi University, Yizhou 546300, China;
6. Zhengzhou Institute of Multipurpose Utilization, Mineral Resources, Chinese Academy of Geological Science, Zhengzhou 450000, China）
Abstract:In order to provide a theoretical basis to improve the leaching rate of lead in lead residue, the kinetics of leaching lead in NaCl-HCl solution were investigated with the shrinking core model for the reaction of liquid-solid. The effects of temperature, brine concentration, particle size and liquid-solid ratio on the leaching lead were studied. The results show that the leaching process is controlled by the surface chemical reaction, and the apparent activation energy is determined to be 45.239 kJ/mol. The kinetics equation can be expressed by a semi-empirical equation according to the experimental data. The leaching speed and the leaching rate of lead are increased by increasing the brine concentration, temperature, liquid-solid ratio and decreasing the particle size of sample.
Key words: NaCl-HCl system; lead residue; lead; leaching; kinetics
