从废铅膏制备超细碳酸铅的表征及热分解性能研究  

Study on characterization and thermal decomposition of ultra-fine carbonated lead powder from lead paste

作　　者：朱新锋[1] 杨家宽[2] 杨丹妮[2] 孙晓娟[2] 郭一飞[1] 陈松涛[1] 

机构地区：[1]河南城建学院环境与市政工程系,河南平顶山467023 [2]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《功能材料》2012年第17期2343-2346,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50804017);教育部新世纪人才支持计划资助项目(NCET-09-0392);湖北省自然科学基金(杰出青年基金)重点资助项目(13105043)

摘　　要：利用废铅膏为原料,采用脱硫、浸出、碳化的湿法工艺制备了超细碳酸铅。碳酸铅为斜方晶体,粒径在0.5～5μm。采用TG-DSC、XRD、SEM对碳酸铅的热分解机理进行研究,结果表明碳酸铅的失重与理论计算相符,整个热处理过程分4个阶段,产物分别是PbCO3.2PbO、α-PbO、Pb3O4和β-PbO。产物PbO为均匀的球形,粒径<0.5μm。Lead carbonate was prepared from lead paste in spent lead acid battery with the hydrometallurgy process includes desulphurization,leaching,carbonation.The decomposition of lead carbonate was studied in inert atmospheres using differential thermal analysis and thermogravimetry（TG-DSC）,scanning electron microscopy（SEM） and X-ray powder diffraction（XRD）.The graphs SEM show the product was hexaganal crystal and the size ranges from 0.5 to 5 μm.The four steps for thermal decomposition of lead carbonate yielded PbCO3·2PbO,α-PbO,Pb3O4,and β-PbO respectively,consistent with curve of TG-DSC.The shape of lead oxide was spheric and its diameter less than 0.5μm.

关 键 词：废铅膏 超细碳酸铅 表征 氧化铅 热分解 

分 类 号：TQ15[化学工程—电化学工业] X7[环境科学与工程—环境工程]