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System and method for synergistic disposal of waste lithium ion batteries in cement kiln

A lithium ion battery and ion battery technology, which are applied in chemical instruments and methods, battery recycling, solid waste removal, etc., can solve the problems of ineffective treatment of waste residue, secondary pollution, and undisclosed complete process of waste lithium battery treatment.

Pending Publication Date: 2018-11-09
长沙中硅环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Cause secondary pollution
[0006] In the process of crushing and dissociation of waste lithium-ion batteries, hydrometallurgy or pyrometallurgy, due to the electrolyte LiPF 6 Instability, oxidation and hydrolysis with oxygen, water vapor, etc. in air to produce HF and PF 5 Highly toxic gases, or flammable, explosive, and chemically reactive organic solvents cause safety hazards and environmental pollution
Moreover, after pickling or strong alkali neutralization and extraction of useful metals, a large amount of acid-base solution and waste residue containing heavy metals cannot be effectively treated, and external discharge will cause secondary pollution
[0007] (2) No recovery of valuable organic matter
[0008] The existing technology focuses on the recovery of rare and precious metals such as lithium, cobalt, nickel, and copper in waste lithium-ion batteries, and does not recover valuable organic matter, which not only pollutes the environment, but also wastes resources
[0009] (3) The recycling process and equipment are not perfect
This reference document 2 discloses a method of using a cement kiln system to dispose of waste lithium battery residues after metal recovery. public

Method used

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  • System and method for synergistic disposal of waste lithium ion batteries in cement kiln
  • System and method for synergistic disposal of waste lithium ion batteries in cement kiln
  • System and method for synergistic disposal of waste lithium ion batteries in cement kiln

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Experimental program
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Embodiment 1

[0122] Such as Figure 1-4 7. As shown in 7-8, this embodiment provides a cement kiln co-processing system for waste lithium-ion batteries, which specifically includes: stack shed 1, anhydrous and oxygen-free biaxial crusher 3, vertical pyrolysis furnace 5, neutralization Tower 9, the extraction system of valuable elements and the cement kiln system; the shed 1 is connected to the feed inlet 301 of the anhydrous and oxygen-free double-shaft crusher 3 through the belt conveyor 2; the outlet of the anhydrous and oxygen-free double-shaft crusher 3 The feed port 311 is connected to the slag material inlet 501 of the vertical pyrolysis furnace 5; the flue gas outlet 506 of the vertical pyrolysis furnace 5 is connected to the neutralization tower 9; the mixed slag outlet 502 of the vertical pyrolysis furnace 5 passes through the feed pipe It is connected with the valuable element extraction system; the deacidification flue gas outlet of the neutralization tower 9 is connected with the...

Embodiment 2

[0156] The difference between this embodiment and embodiment 1 is that:

[0157] In order to increase the ability of the crushing roller surface to crush and cut metal, the crushing teeth provided on the outer circumference of the sleeve G2 of the moving roller 306 and the driven roller 305 are concave and convex crushing teeth (such as Figure 5-6 As shown), the sleeve roller G2 of the moving roller 306 and the concave-convex crushing teeth of the sleeve roller G2 of the driven roller 305 are engaged and connected to each other, which is beneficial for crushing and shredding materials.

[0158] The disposal method of the cement kiln co-processing waste lithium-ion battery system provided by the above-mentioned embodiment 1 and embodiment 2 includes: storage, classification and pretreatment of waste lithium-ion batteries; water-free and oxygen-free crushing and disintegration; evaporative decomposition and sintering; in flue gas With deacidification, solid mixed slag valuable eleme...

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Abstract

The present invention provides a system and a method for synergistic disposal of waste lithium ion batteries in a cement kiln. The system is based on the characteristics of substances contained in thewaste lithium ion batteries and aims at the problems existing in the prior art. The system includes a waste lithium ion battery storage device, an anhydrous and anaerobic biaxial crusher, a verticalpyrolysis furnace, a neutralization tower, a valuable element extraction system and a cement kiln system; the disposal method is as follows: classified pretreatment of the waste lithium ion batteries,anhydrous and anaerobic breakdown, evaporation decomposition sintering in the vertical pyrolysis furnace into solid mixed slag, and extracting of valuable elements from the solid mixed slag; neutralization of fluorine-containing and phosphorus-containing compound gases, high-temperature incineration of combustible waste gases in the cement kiln, and disposal of all waste residues, and clean production and environmental protection can be achieved. The system has simple device structure, can realize the maximum utilization of resources and energy in the whole system, and can realize the low cost recovery of the valuable elements by a simple method.

Description

Technical field [0001] The invention relates to a system and method for recycling waste lithium ion batteries, in particular to a system and method for co-processing waste lithium ion batteries using cement kilns, and belongs to the technical field of waste lithium ion battery recycling and reuse. Background technique [0002] Lithium-ion batteries have the advantages of good electrochemical performance and environmental protection. Lithium-ion batteries have been widely used in mobile phones, notebook computers, video cameras, digital cameras and other fields, and are expected to be widely used in electric vehicles, aerospace, and energy storage. . As a high-tech, high-yield, high-profit, high-profit, environmentally friendly energy product, lithium-ion batteries are regarded by foreign experts as one of the top ten high-tech industries or one of the top ten profitable industries in the 21st century. [0003] With the increasing consumption of electronic products, their consumpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00H01M10/54
CPCH01M10/54B09B3/00B09B3/45B09B3/40Y02W30/84
Inventor 肖喜才刘恩辉
Owner 长沙中硅环保科技有限公司
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