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Disposal method of waste lithium ion battery

A technology of lithium ion battery and treatment method, applied in the field of solid waste recycling and treatment, can solve the problem of low degree of harmlessness, and achieve the effect of being easy to engineer and suitable for large-scale industrial application

Active Publication Date: 2020-03-03
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a treatment method for waste lithium ion batteries to solve the problem of low degree of recycling and harmlessness of waste lithium ion batteries in the prior art

Method used

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  • Disposal method of waste lithium ion battery
  • Disposal method of waste lithium ion battery

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Embodiment 1

[0061] After the waste lithium-ion batteries are intensively discharged, they are sent to the nitrogen-protected crushing system for coarse crushing. The particle size is controlled at 2-3 cm, and the temperature during crushing is controlled below 25°C. The volatile organic gas generated during crushing is sent to the cracked gas secondary combustion system.

[0062] The crushed cell scraps are sealed and put into a low-temperature gasification cracking furnace under a nitrogen atmosphere, and the cracking temperature is 550°C. The inlet and outlet of the low-temperature gasification cracking furnace are sealed with double-layer nitrogen. The superheated saturated steam passed into the furnace is gasified and cracked at low temperature with the battery scraps to obtain cracked gas and solid residues, specifically: organic matter in the electrolyte, binder PVDF, etc. undergo cracking and gasification reactions to generate methane, ethane, etc. Alkane gas and some olefin gas, ...

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Abstract

The invention provides a waste lithium ion battery processing method. The waste lithium ion battery processing method comprises S1, crushing battery cells to obtain crushed battery cells and volatileorganics; S2, performing low-temperature gasification and pyrolysis on the crushed battery cells to obtain pyrolysis gas and solid residues; S3, burning the pyrolysis gas and the volatile organics toobtain flue gas; S4 spraying lime milk into the flue gas for deacidification reaction to convert phosphorous acid gas inside the flue gas into calcium phosphate and fluorous acid gas into calcium fluoride; dedusting and then emitting the reacted flue gas; S5, fine-crushing and screening the solid residues to obtain powder and metal pieces; S6, recycling iron, aluminum and copper in the metal pieces; S7, acid-leaching and then filtering the powder to obtain filter liquor, and preparing precursor materials with the filter liquor. The waste lithium ion battery processing method provides a complete waste lithium ion battery processing route to recycle metal resources and meanwhile to perform harmless treatment on the organics and hazardous materials, thereby being a recycling, green and environment-friendly processing process.

Description

technical field [0001] The invention relates to the field of recycling and processing of solid waste, in particular to a method for processing waste lithium-ion batteries. Background technique [0002] Lithium-ion battery is a rechargeable chemical battery with good comprehensive performance. It has the advantages of high working voltage, high specific energy, long cycle life, and small self-discharge. It is widely used in mobile communications, notebook computers, portable tools, and electric vehicles. and other fields. Due to the large consumption of lithium-ion batteries, it will cause serious pollution to the environment. At the same time, waste lithium-ion batteries, especially batteries, contain a lot of resources such as iron, aluminum, copper, lithium, graphite, etc., which will also cause waste of resources. Therefore, it is necessary to recycle waste lithium-ion batteries. [0003] However, the recycling of waste lithium-ion batteries in my country is currently i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 刘诚陈学刚孙宁磊宋磊郝朋越余跃裴忠冶陈宋璇
Owner CHINA ENFI ENGINEERING CORPORATION
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