利用火法冶金和湿法冶金的方法高效回收废LiNixCoyMnzO2正极材料

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Tianwei Zhang, Juanye Dao, Jinsong Wang, Yuzhong Guo, Rundong Wan, Chengping Li, Xian Zhou, Zhengfu Zhang
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引用次数: 0

摘要

回收利用废旧锂离子电池可获得可观的环境效益和经济效益。湿法冶金常用于回收废LiNixCoyMnzO2正极材料。由于Ni、Co和Mn是过渡金属,它们表现出相似的性质;因此,区分它们是困难的。因此,大多数研究人员都集中在浸出过程上,而很少关注从废弃LiNixCoyMnzO2阴极材料中分离有价金属。在此,我们提出了一种环境友好,温和的方法,包括使用火法冶金和湿法冶金来逐步浸出有价金属并有效地分离它们。有趣的是,利用天然石墨粉通过还原焙烧和水浸工艺回收Li,通过氨浸和萃取工艺回收Ni和Co,通过酸浸和蒸发结晶工艺回收Mn。结果表明,采用水浸、氨浸和酸浸工艺可浸出~ 87%的Li、97.01%的Co、97.08%的Ni和99%的Mn。响应面法结果表明,(NH4)2SO3浓度是影响过渡金属浸出的重要因素。在最佳条件下,可浸出~ 97.01% Co、97.08% Ni和0.64% Mn。LiNixCoyMnzO2的分解分为两个步骤。该研究为开发一种环境友好、温和的浸出工艺以有效回收有价金属提供了有价值的见解,这对锂离子电池回收行业至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Highly efficient recovery of waste LiNixCoyMnzO2 cathode materials using a process involving pyrometallurgy and hydrometallurgy

Highly efficient recovery of waste LiNixCoyMnzO2 cathode materials using a process involving pyrometallurgy and hydrometallurgy

Substantial environmental and economic benefits can be achieved by recycling used lithium-ion batteries. Hydrometallurgy is often employed to recover waste LiNixCoyMnzO2 cathode materials. As Ni, Co and Mn are transition metals, they exhibit similar properties; therefore, separating them is difficult. Thus, most researchers have focused on leaching processes, while minimal attention has been devoted to the separation of valuable metals from waste LiNixCoyMnzO2 cathode materials. Herein, we propose an environment-friendly, gentle process involving the usage of pyrometallurgy and hydrometallurgy to gradually leach valuable metals and effectively separate them. Interestingly, Li is recovered through a reduction roasting and water leaching process using natural graphite powder, Ni and Co are recovered through ammonia leaching and extraction processes and Mn is recovered through acid leaching and evaporation-crystallization processes. Results show that ∼87% Li, 97.01% Co, 97.08% Ni and 99% Mn can be leached using water, ammonia and acid leaching processes. The result obtained using the response surface methodology shows that the concentration of (NH4)2SO3 is a notable factor affecting the leaching of transition metals. Under optimal conditions, ∼97.01% Co, 97.08% Ni and 0.64% Mn can be leached out. The decomposition of LiNixCoyMnzO2 is a two-step process. This study provides valuable insights to develop an environment-friendly, gentle leaching process for efficiently recycling valuable metals, which is vital for the lithium-ion battery recycling industry.

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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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