电解锰阳极泥的热处理及其铅离子的浸出  

Heat Treatment of Electrolytic Manganese Anode Slime and Leaching of Lead Ions

作　　者：刘璐[1] 张宏波[2] 郭颂[2] 毕亚凡[2] 

机构地区：[1]武汉工程大学理学院,湖北武汉430073 [2]武汉工程大学化学与环境工程学院,湖北武汉430073

出　　处：《安全与环境工程》2016年第2期50-54,共5页Safety and Environmental Engineering

基　　金：湖北省环保专项资金项目

摘　　要：以电解锰阳极泥为研究对象,将经过预处理的电解锰阳极泥经高温焙烧处理,然后采用醋酸铵溶液进行浸取试验,对焙烧处理前后和浸取后样品进行扫描电镜(SEM)表征分析,研究了焙烧后的电解锰阳极泥中的铅离子的浸出行为,并通过单因素分析初步探讨了焙烧温度、醋酸铵浓度、液固比、浸取时间对阳极泥中铅离子浸出迁移的影响。试验结果表明:未经焙烧处理的电解锰阳极泥颗粒的微观结构是致密性晶体,而经高温焙烧处理的电解锰阳极泥颗粒则均形成网状结构,且经750℃焙烧的电解锰阳极泥颗粒网状空隙尺寸较650℃焙烧的稍大;浸取处理后的焙烧阳极泥微观结构变化不明显;未经焙烧处理的阳极泥中铅的浸出率低于9%,而经650℃和750℃焙烧的阳极泥的铅浸出率均可达到90%左右。Taking the electrolytic manganese anode slime as the research object,this paper conducts experiments of high-temperature roasting and leaching with ammonium acetate solution on materials sequentially after pretreatment.At the same time,before and after roasting process,the samples are leached and characterized by scanning electron microscopy（SEM）.Additionally,the paper studies the leaching behaviors of lead ions existing in the electrolytic manganese anode slime,and carries out single factor experiments to preliminarily investigate the influence of factors like roasting temperature,concentration of ammonium acetate,liquid-solid ratio and leaching time on the leaching behavior of lead ions.The test results show that unroasted electrolytic manganese anode slime particles possess dense crystal structure,while reticular structure is formed inside the roasted electrolytic manganese anode slime particles under high temperature which provides a channel for the leaching and migration of lead ions.Specifically,mesh gap sizes of the particles of anode slime being roasted at 750℃are slightly larger than those being roasted at 650℃,though the microscopic structure of roasted electrolytic manganese anode slime does not change much after being leached.The leaching rate of lead from the unroasted anode slime is lower than 9%,while that from roasted electrolytic manganese anode slime at the temperature of 750℃ and 650℃ could both reach around 90%.

关 键 词：电解锰阳极泥 高温焙烧 铅离子 浸取试验 

分 类 号：X705[环境科学与工程—环境工程]