Continuous carbonization and pyrolysis treatment method of waste lithium battery

A technology for waste lithium batteries and a disposal method is applied in the field of continuous carbonization and pyrolysis disposal of waste lithium batteries, which can solve problems such as ineffective recycling, and achieve the effects of improving the utilization efficiency of combustion heat energy, reducing the probability of oxidation, and reducing the generation of harmful substances.

Pending Publication Date: 2020-06-12
上海智迭科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical crushing method: cannot effectively recover precious metals and various valuable resources in lithium batteries

Method used

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  • Continuous carbonization and pyrolysis treatment method of waste lithium battery
  • Continuous carbonization and pyrolysis treatment method of waste lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A continuous carbonization and pyrolysis treatment method for waste lithium batteries adopts the following treatment process:

[0052] The first step: preheating, that is, preheating the carbonization equipment 05 to the working temperature, usually the temperature in the furnace is set at 500-700°C;

[0053] The second step: pretreatment, including two steps, that is, lithium battery discharge and crushing. First, the lithium battery must be fully discharged (if it is a lithium battery pack, you can choose to disassemble the battery first, together with the battery pack shell), and put it into The temporary storage tank 01 enters the closed pulverizer 03 through a closed or semi-closed conveying device 02, which can be selected from shaftless screw or belt transportation. After pulverization, the mixed material enters the carbonization chamber 07 of the carbonization equipment 05 through the feed valve 04;

[0054] Step 3: Carbonization and pyrolysis treatment process....

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Abstract

The invention provides a continuous carbonization and pyrolysis treatment method of a waste lithium battery. The method adopts the following treatment flow of step 1, preheating, specifically, preheating a carbonization device to a working temperature; step 2, pretreating, specifically, discharging and crushing the lithium battery, wherein firstly, the lithium battery is put into a temporary storage tank after being subjected to full discharge and enters a crusher through a closed conveying device, and after crushing, mixed materials enter the carbonization device; step 3, performing a carbonization and pyrolysis treatment process and a gas combustion process; step 5, performing a tail gas treatment process; and step 6, sorting solid materials discharged from the carbonization device. According to the treatment method of the waste lithium battery, isolation between a carbonization chamber and gas combustion in the carbonization process is realized, the mixed materials obtained after the waste lithium battery is crushed are heated through the indirect heat transfer mode between gas combustion as well as an auxiliary heating device and the carbonization chamber, oxygen is completelyisolated in the carbonization chamber, and oxidation of metal in the carbonization chamber is effectively avoided through the control by means of the pressure difference and a one-way valve, so that the utilization value of the final product is improved.

Description

technical field [0001] The invention belongs to the technical field of recycling waste lithium batteries, and in particular relates to a continuous carbonization pyrolysis treatment method for waste lithium batteries. Background technique [0002] At present, there are generally physical crushing methods, hydrometallurgical methods, and dry metallurgical methods for disposing of waste lithium batteries. Physical crushing method: It is impossible to effectively recover precious metals and various valuable resources in lithium batteries. Hydrometallurgy: Commonly known as chemical method, it will produce relatively large pollution and is harmful to air, water and soil. Dry metallurgy: high energy consumption and large amount of waste gas. Therefore, it is necessary to research and develop a new method for effectively disposing of waste lithium batteries. Contents of the invention [0003] The purpose of the present invention is to provide a continuous carbonization pyroly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/027F23G5/033F23G5/14F23G5/44F23G5/46F23G7/00F23G7/07F23J15/02F24D15/02
CPCF23G5/027F23G5/033F23G5/14F23G5/44F23G5/46F23G7/003F23G7/07F23J15/022F23J15/025F24D15/02
Inventor 朱准平肖云凯钟坚李浩
Owner 上海智迭科技有限公司
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