摘要
以废旧铅酸蓄电池铅膏为原料,采用正交试验设计,详细考察了废旧铅蓄电池铅膏的碳酸盐化转化过程。研究发现,各因素对转化率的影响顺序为:碳酸钠浓度>转化温度>转化时间>搅拌速度,并确定了最佳转化条件。通过差热-热重(TG-DTA)分析进一步研究了铅膏转化前后的热分解特性,结果表明,铅膏中的硫酸铅可全部转化为碳酸铅,使铅膏分解温度由转化前的880.56℃降低到转化后的357.86℃,从而避免了火法处理废旧铅蓄电池时产生SO2,同时也降低了能耗。
In this paper, conversion of pastes in exhausted lead storage batteries into lead carbonate in sodium carbonate solution was investigated. The orthogonal designing was applied to study the correlation of factors connected with transformation rate. The results show that influencing order of these factors is Na2CO3 concentration 〉 reaction temperature 〉 reaction time 〉 stirring speed. And optimum conditions of transformation process are obtained. The characters of calcined pastes were studied by TG-DTA. The results expressed that lead sulfate in pastes have been transformed into lead carbonate completely. It makes calcining temperature of pastes decrease from 880.56℃ to 357.86℃ and avoids emitting of SO2 in the course of disposing exhausted lead storage batteries by fire＇metallurgy and diminishes energy consume.
出处
《湿法冶金》
CAS
2005年第3期146-149,共4页
Hydrometallurgy of China
基金
国家自然科学资金资助项目(50204013)。
关键词
铅膏
碳酸钠
转化
正交设计
lead pastes
sodium carbonate
transformation
orthogonal designing
