硫酸铅在柠檬酸-氢氧化钠体系浸出动力学研究  

Leaching kinetic mechanism of lead sulfate in citric acid-NaOH system

作　　者：张伟[1] 高雨霏 张丽迎 唐港 左其亭[1] 喻文昊 杨家宽[2] Zhang Wei;Gao Yufei;Zhang Liying;Tang Gang;Zuo Qiting;Yu Wenhao;Yang Jiakuan(School of Water Conservancy&Environment,Zhengzhou University,Zhengzhou 450000,China;School of Environmental Science and Engineering,Huazhong University of Science and Technology)

机构地区：[1]郑州大学水利与环境学院,河南郑州450000 [2]华中科技大学环境科学与工程学院

出　　处：《无机盐工业》2019年第2期19-21,共3页Inorganic Chemicals Industry

基　　金：国家科技支撑计划(2014BAC03B02);郑州大学青年教师启动基金(120-32210517);河南省高等学校重点科研项目(18B610008);河南省重点研发与推广专项(182102311033)

摘　　要：以柠檬酸为主体浸出剂的湿法浸出工艺可有效实现废铅酸电池铅膏(简称废铅膏)的湿法回收。主要研究了氢氧化钠试剂对废铅膏较难处理的组分硫酸铅在柠檬酸浸出体系的动力学影响。动力学实验表明:在柠檬酸-氢氧化钠体系中,硫酸铅反应速率随浸出温度升高而升高,表观活化能为45 kJ/mol,表明浸出反应受化学反应控制。加入氢氧化钠调控到合适的pH,可有效更新反应过程中柠檬酸铅-硫酸铅的反应界面,以促进反应的进行。The spent lead paste could be recycled based on citric acid method.It mainly investigated the effect of NaOH addition on the kinetic mechanism for the lead sulfate in the citric acid leaching system,which was the difficult part of the deal with.The kinetic investigation illustrate that the desulphurization ratio of lead sulfate increased with the increasing of leaching temperature.The apparent activation energy was measured as 45 kJ/mol,thusly the leaching process was controlled by surface chemical reaction.The reaction procedure of lead sulfate could be accelerated for the structure of lead citrate-lead sulfate could be updated with the addition of NaOH reagents.

关 键 词：硫酸铅 柠檬酸 浸出剂 废铅膏 

分 类 号：TQ125.12[化学工程—无机化工]