从废旧锂电池中分离回收钴的工艺研究_毕业论文.doc

南京大学
Nanjing UNIVERSITY

本科毕业论文
从废旧锂电池中分离回收钴的工艺研究

学院名称: 化学与环境工程学院
专业: 应用化学
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二〇一三年六月
从废旧锂电池中分离回收钴的工艺研究
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,再生处理是目前的研究热点,同时也是最具发展前途的方案,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张。本课题对从废旧锂电池中分离回收钴的工艺进行了研究,提出了以 H2SO4溶液为介质,以硫代硫酸钠固体为还原剂,于80 ℃ 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。 %。母液中Li+加固体Na2CO3处理,沉淀后重结晶,得到Li2CO3。 %。
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 batteries
Abstract: Disposal of spent lithium-ion batteries(LIBS) has ing 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 process of dissolving LiCoO2 in Li-ion battery made by Na2S2O3 solution under 80 ℃milled for h 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 %. The Li+ in pregnant liquor was concentrated by adding solid Na2CO3 and Li2CO3 was collected after serious of crystallization, the purity was %.

Key words: Li-ion battery ; LiCoO2 ; Na2S2O3 ; recovery ; leach
目录
第一章前言 1
研究本课题的意义和目的 1
国内外本领域科技创新发展概况和最新发展趋势 1
1
锂离子电池的结构及材料组成 2
废锂离子电池回收利用的必要性 3
国家相关法规政策 5
5
电极材料的浸出 9
浸出液中金属的提取和分离 9
废锂离子电池中金属回收研究开发现状的国内外比较 13
废锂离子电池重金属回收研究开发现状 13
国内外技术比较 14
本课题的研究内容和方案 15
15
1