大学从废旧锂电池中分离回收钴的工艺讨论学院名称： 化学与环境工程学院 专 业： 应用化学班 级：学号：姓 名：指导老师：指导老师职称： 二〇一三 年 六 月Nanjing UNIVERSITY 本 科 毕 业 论 文从废旧锂电池中分离回收钴的工艺讨论摘要：随着锂离子电池产量和应用的增多，废弃锂离子电池的处置己经成为一个日益迫切的问题。在众多处置方案中，再生处理是目前的讨论热点，同时也是最具进展前途的方案,它不仅可以解决报废锂离子电池所带来的一系列环境问题，而且对电池中有价金属进行回收并循环利用，有效的缓解了资源的紧。本课题对从废旧锂电池中分离回收钴的工艺进行了讨论，提出了以 H2SO4溶液为介质,以硫代硫酸钠固体为还原剂,于 80 ℃搅拌 2.5 h ,溶解锂离子电池中的 LiCoO2’溶解液中的 Li+和 Co2+用NaOH 溶液为沉淀剂进行分离; Co (OH) 2沉淀先经过提纯,提纯后的试样在 800 ℃下煅烧 4 h ,可回收得到 Co3O4。Co 的纯度达到 91.23 %。母液中 Li+加固体 Na2CO3处理,沉淀后重结晶,得到 Li2CO3。Li 的纯度达 93.5 %。关键词：锂离子电池; 钴酸锂; 硫代硫酸钠; 回收; 浸出Research of recycling cobalt from the waste Lithium-ion batteriesAbstract: Disposal of spent lithium-ion batteries(LIBS) has becoming more and more important with the growth of production and use of LIBS. Recycling treatment has attracted more and more attentions. Compared to other methods of treatment, recycling can not only resolves environmental problems, but also slows the lack of resource effectively by recovering and reusing of valued metals from LIBS. This project study the craft from the waste separation and recovery of cobalt in lithium battery.The process of dissolving LiCoO2 in Li-ion battery made by Na2S2O3 solution under 80 ℃milled for 2.5h with H2SO4 solution was studied.The separation of Li+ and Co2+ in solution could be realized by adopting NaOH solution as precipitator , Co3O4 was obtained after Co (OH) 2 had been purified and calcined for 4h under 800℃, its purity was 9...
