微波焙烧强化废锂离子电池中的金属回收研究

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Abstract Focusing on the metal recovery from the cathode material of spent lithium-ion batteries, microwave pre-treatment was proposed in this study to improve metals recovery efficiency. The results showed that different microwave power had its optimal treatment time, which could lead to high recovery efficiency of metals. Combined with process, energy consumption, cost and other factors, microwave roasting power with 600W and roasting time with 6min were determined to be the optimal pretreatment conditions. Under the conditions of H₂SO₄ +H₂O₂ as leaching system, solid-liquid ratio with 20g/L, reaction temperature with 80℃ and reaction time with 60min, the leaching rates of Li, Ni, Co and Mn reached 96%, 85%, 76% and 52%, respectively. The enhancement effect of microwave treatment on the leaching rate mainly came from the interaction of the following aspects:the instantaneous high temperature generated by the discharge of metal particles, the reduction reaction of metals and the removal of organics coating on the surface of material particles at the instantaneous high temperatures.

Key words： spent lithium-ion battery cathode material microwave pre-treatment metals recovery

Received: 09 February 2021

PACS:

X705

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	Articles by authors
	LI Zhi-qin
	LI Shang-lue
	ZHUANG Xu-ning
	LI Fei
	GU Wei-hua
	BAI Jian-feng
	WANG Jing-wei

Cite this article:

LI Zhi-qin,LI Shang-lue,ZHUANG Xu-ning等. Research on the effect of microwave roasting on recovery of valuable metals from cathode materials of spent lithium ion batteries[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(10): 4712-4719.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I10/4712

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