(1. 桂林理工大學(xué) 材料科學(xué)與工程學(xué)院 省部共建廣西有色金屬及特色材料加工國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地
廣西礦冶與環(huán)境科學(xué)實(shí)驗(yàn)中心，桂林 541004；
2. 廣西科學(xué)院 應(yīng)用物理研究所，南寧 530000；
3. 桂林理工大學(xué) 環(huán)境科學(xué)與工程學(xué)院，桂林 541004；
4. 廣西金山銦鍺冶金化工有限公司，河池 547200；
5. 河池學(xué)院 化學(xué)與生物工程學(xué)院，宜州 546300；
6. 中國(guó)地質(zhì)調(diào)查局 鄭州礦產(chǎn)綜合利用研究所，鄭州 450000)
摘 要: 以浸出溫度、NaCl濃度、顆粒粒度和液固比對(duì)鉛浸出率影響的實(shí)驗(yàn)條件和數(shù)據(jù)為基礎(chǔ)，建立NaCl-HCl體系，采用液-固多相反應(yīng)的收縮核模型，系統(tǒng)分析了鉛渣中鉛的浸出動(dòng)力學(xué)過(guò)程。結(jié)果表明：根據(jù)實(shí)驗(yàn)數(shù)據(jù)求出浸出反應(yīng)的宏觀動(dòng)力學(xué)方程，計(jì)算得到表觀活化能為45.239 kJ/mol，說(shuō)明該體系浸出過(guò)程受表面化學(xué)反應(yīng)控制；在實(shí)驗(yàn)選取的參數(shù)范圍內(nèi)，增大NaCl濃度、浸出溫度和液固比以及減小顆粒粒度均有利于提高鉛的浸出率。
關(guān)鍵字: NaCl-HCl體系；鉛渣；鉛；浸出；動(dòng)力學(xué)
（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
