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

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...

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

Images