Chemical and process mineralogical characterizations of spent lithium-ion batteries: an approach by multi-analytical techniques.
Chemical and process mineralogical characterizations of spent lithium-ion batteries: an approach by multi-analytical techniques.
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DOI：
10.1016/j.wasman.2014.01.002
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发表时间：
2014-06
期刊：
影响因子：
8.1
通讯作者：
Zhang Tao;Yaqun He;Fangfang Wang;Linhan Ge;Xiang-nan Zhu;Hong Li
中科院分区：
文献类型：
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作者：
Zhang Tao;Yaqun He;Fangfang Wang;Linhan Ge;Xiang-nan Zhu;Hong Li
选矿操作是任何回收过程中实现目标部分的释放、分离和浓缩的关键步骤。开发有效的回收方法以从废旧锂离子电池中回收所有有价值的部件非常有必要。本研究的目的是通过结合多种分析技术，仔细进行废旧锂离子电池的化学和工艺矿物学表征，为回收过程中有效的机械破碎和分离方法的研究提供基础信息。结果表明，废旧锂离子电池中Co、Cu和Al的品位较高，分别达到17.62wt.%、7.17wt.%和21.60wt.%。废旧锂离子电池具有良好的选择性破碎性能，破碎后的产品可分为三部分，即富铝部分（+2mm）、富铜、富铝部分（-2+0.25mm）和富钴、富石墨部分（-0.25mm）。矿物相和化学态分析表明，从-0.25 mm粒度级分回收的电极材料保留了锂离子电池中的原始晶型和化学态，但粉末表面被某种碳氢化合物包覆。根据这些结果，提出了回收废锂电池的流程图。
Mineral processing operation is a critical step in any recycling process to realize liberation, separation and concentration of the target parts. Developing effective recycling methods to recover all the valuable parts from spent lithium-ion batteries is in great necessity. The aim of this study is to carefully undertake chemical and process mineralogical characterizations of spent lithium-ion batteries by coupling several analytical techniques to provide basic information for the researches on effective mechanical crushing and separation methods in recycling process. The results show that the grade of Co, Cu and Al is fairly high in spent lithium ion batteries and up to 17.62 wt.%, 7.17 wt.% and 21.60 wt.%. Spent lithium-ion batteries have good selective crushing property, the crushed products could be divided into three parts, they are Al-enriched fraction (+2 mm), Cu and Al-enriched fraction (−2 + 0.25 mm) and Co and graphite-enriched fraction (−0.25 mm). The mineral phase and chemical state analysis reveal the electrode materials recovered from −0.25 mm size fraction keep the original crystal forms and chemical states in lithium-ion batteries, but the surface of the powders has been coated by a certain kind of hydrocarbon. Based on these results a flowsheet to recycle spent LiBs is proposed.