摘要
以废铅酸蓄电池中的铅膏为研究对象,针对HCl-NaCl-CaCl2体系浸铅工艺,采用液-固多相反应的收缩核模型研究了铅膏中铅的浸出动力学,考察了搅拌速度、浸出温度、样品粒度对铅浸出反应速率的影响。结果表明:在实验选取的温度范围内,温度越高,样品粒度越细,越有利于铅膏的回收,搅拌速度对铅浸出率影响不大,表观活化能Ea为13.73 kJ/mol,属于固膜(内)扩散控制过程。该研究为高效低耗浸出铅提供了理论依据。
Taking the lead plaster in waster lead-acid batteries as research object,the leaching kinetics of lead in lead plaster was studied by the shrinking core model of liquid-solid multiphase reaction for lead leaching process in HCl-NaCl-CaCl2 system.The effects of mixing speed,leaching temperature and sample size on leaching reaction rate of lead were investigated.The results showed that within the bounds of experimental selected temperature,it is in favour of recovering lead plaster with higher temperature and finer sample size.The mixing speed had little influence on leaching rate of lead and the apparent activation energy Ea was 13.73 kJ/mol which belonged to diffusion controlled process of stationary film.The study provided theoretical basis for leaching lead with high efficiency and low consumption.
出处
《矿冶工程》
CAS
CSCD
北大核心
2010年第6期61-64,共4页
Mining and Metallurgical Engineering
关键词
铅
废铅酸蓄电池
铅膏
动力学
浸出
表观活化能
lead
waste lead-acid battery
lead plaster
kinetics
leaching
apparent activation energy
