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Method for treating waste lithium battery by microwave pyrolysis

A waste lithium battery, pyrolysis technology, applied in the direction of battery recycling, waste collector recycling, recycling technology, etc., to achieve the effect of less waste generation, good development prospects, and low processing costs

Inactive Publication Date: 2013-08-14
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, researchers have applied microwave pyrolysis to the treatment of biomass, etc., indicating that microwave pyrolysis is helpful for the directional transformation of biomass. Chinese patent CN101560404 discloses a method for preparing biomass oil by microwave pyrolysis, but microwave pyrolysis The method for processing waste lithium batteries has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The power lithium battery (lithium iron phosphate cylindrical lithium battery, model IFR18650) decommissioned from the electric vehicle will be removed from the metal shell and slightly broken; the shelled waste lithium battery will be placed in an industrial microwave oven under the condition of nitrogen gas Carry out pyrolysis, the pyrolysis temperature is controlled at 400°C, and the pyrolysis time is 30 minutes. The pyrolysis gas generated by pyrolysis is separated into solids by a cyclone separator. After the pyrolysis gas is quickly condensed with cooling water, part of the pyrolysis gas is condensed into liquid. The condensed liquid is packaged as a chemical raw material, and the uncondensed pyrolysis gas is collected in a gas storage cabinet; the pyrolyzed solid is placed in a flotation machine with kerosene as the flotation liquid for separation to obtain electrode materials, graphite, Aluminum foil, copper sheet and other recyclable resources.

Embodiment 2

[0019] Remove the plastic shell of the waste lithium battery (lithium-ion polymer square lithium battery, model 606168) used for mobile phones, notebook computers, etc.; put the shelled waste lithium battery and the plastic shell into an industrial microwave oven and put it into the The pyrolysis is carried out under the condition of argon, the pyrolysis temperature is controlled at 900°C, and the pyrolysis time is 30 minutes. The pyrolysis gas generated by pyrolysis is separated from the solid by membrane filter equipment, and then the pyrolysis gas is rapidly condensed with cooling water. The pyrolysis gas is condensed into a liquid, and the condensed liquid is packaged as a chemical raw material, and the uncondensed pyrolysis gas is collected in a gas storage cabinet; the pyrolyzed solid is put into a jig for separation, and electrode materials, graphite, and aluminum foil are obtained , copper and other recyclable resources.

Embodiment 3

[0021] Remove the metal shell of the decommissioned lithium battery (conventional cylindrical lithium battery, model ICR18650) and slightly crush it; put the shelled waste lithium battery into an industrial microwave oven and carry out pyrolysis under the condition of introducing air, pyrolysis The temperature is controlled at 600°C, and the pyrolysis time is 45 minutes. If necessary, cooling water can be used to remove excess heat. The pyrolysis gas generated by pyrolysis is separated from the solid by the cyclone separator and then passed into the combustion furnace for direct combustion; The solids are sorted by a jig machine to obtain recyclable resources such as electrode materials, graphite, aluminum foil, and copper sheets.

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Abstract

The invention discloses a method for treating a waste lithium battery by microwave pyrolysis. The method comprises the following steps of: placing a waste lithium battery which is discharged thoroughly in an industrial microwave oven for the pyrolysis, and respectively performing aftertreatment on oil gas and solid generated during the pyrolysis, wherein a shell of the battery is removed, and the pyrolysis temperature is 400-900 DEG C. The method is simple in treatment process, high in energy utilization rate, few in generated wastes, small in occupying area, low in treatment cost, and short in treatment time. In addition, by using the method, the environment friendliness can be realized, three wastes can not be generated, the zero discharging of the wastes can be realized basically, and the energy and resource recycling of the waste lithium battery can be realized, so that the method has a good development prospect.

Description

technical field [0001] The invention belongs to the field of solid waste disposal, and in particular relates to a method for treating waste lithium batteries by microwave pyrolysis. Background technique [0002] Commonly used disposal technologies for waste lithium batteries include landfill technology, hydrometallurgy technology, and incineration technology. Although these technologies have made some progress, there are still many difficult problems to solve. Landfill technology causes a lot of waste of valuable resources; hydrometallurgy technology only focuses on the recovery of metals, which cannot realize resource recycling, and produces a large amount of waste water, causing secondary pollution to the environment; incineration technology will not only make valuable, The available resources are burned, and the heavy metals and dioxins produced will also cause secondary pollution. Therefore, it is imminent to research and develop high-efficiency energy-saving and high-g...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02E60/12Y02W30/84
Inventor 汪永威赵光金朱莉娜吴文龙
Owner STATE GRID CORP OF CHINA
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