机械力作用对钴酸锂硫酸化焙烧产物的影响  

Influence of mechanical force on sulphation roasting products of LiCoO_2

作　　者：王大辉[1] 彭勃[1] 陈怀敬[1] 王耀军[1] 文豪[1] 曹笃盟 

机构地区：[1]兰州理工大学,有色金属先进加工与再利用省部共建国家重点实验室,甘肃兰州730050 [2]兰州金川科技园有限公司

出　　处：《无机盐工业》2016年第3期20-24,共5页Inorganic Chemicals Industry

基　　金：国家自然科学基金(51264027);国家重点基础研究发展规划(973计划,2012CB722806);有色金属先进加工与再利用国家重点实验室基金(SKL12003);甘肃省科技重大专项(1502FKDA015)

摘　　要：目前,研究者仍然不清楚机械研磨处理对从废锂离子电池中获得的钴酸锂(LiCoO_2)的硫酸化焙烧的影响。对钴酸锂与一水合硫酸氢钠(Na HSO4·H2O)混合物球磨前后的产物进行热重-差热-质谱(TG-DSC-MS)分析,结果表明球磨处理使焙烧环节焙烧温度降低。对钴酸锂与一水合硫酸氢钠混合物采用不同球磨时间处理后再进行焙烧,对焙烧产物进行X射线衍射分析发现,球磨0.5 h后的焙烧产物中出现了LiNaSO_4、Na6Co(SO4)4和Na2SO4。对焙烧产物进行扫描电镜-能谱(SEM-EDS)分析,结果表明焙烧产物形貌不规则,呈大小不同的块状,而且颗粒有团聚现象,氧、硫、钠、钴在整个焙烧产物中呈弥散状态均匀分布。Influence of mechanical ball mill on the sulfating roasting of LiCoO2 extracted from spent lithium ion battery is not clear at present.The mixtures of LiCoO2 and Na HSO4·H2O with different ratios were milled and roasted.The TG-DSC-MS results showed that ball milling treatment was beneficial to decrease roasting temperature.Roasted product after ball milling0.5 h was composed of LiNaSO4,Na6Co（SO4）4,and Na2SO4.The SEM and EDS results showed that the roasting product had a dense tissue and irregular shape.Particle agglomeration was also observed.Distribution of O,S,Na,and Co elements was homogeneous in the roasting products.

关 键 词：废锂离子电池 钴酸锂 回收 机械球磨 酸性焙烧 

分 类 号：TQ131.11[化学工程—无机化工]