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Incomplete extraction battery recovery method

A battery recycling and incomplete technology, applied in battery recycling, battery electrodes, recycling technology, etc., can solve the problems of energy consumption, high cost, high content, backward technology, etc., and achieve the effect of efficient recycling

Active Publication Date: 2021-02-09
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditionally, the nickel, cobalt and manganese elements of the positive electrode material of waste power batteries are recovered through the extraction method. However, the solution product separated by the traditional extraction method has many types of impurities and high content, and the recovery process is complicated to operate, and the energy consumption and cost are high. It is beneficial to realize the economical and sustainable recycling of waste batteries, the technology is relatively backward, and the limitations are obvious

Method used

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  • Incomplete extraction battery recovery method

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Experimental program
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Effect test

Embodiment 1

[0035] A battery recycling method not fully extracted, comprising the following specific steps:

[0036] (1) Discharging, coarsely crushing, pyrolyzing, and finely crushing waste batteries in sequence to obtain waste battery powder;

[0037] (2) Put the waste battery powder in a closed tube furnace, let nitrogen gas with a specification of 99.999% at a flow rate of 10mL / min at 20°C for 10 minutes, and connect the gas outlet to the exhaust gas absorption device A, which has a built-in absorption device The liquid is 0.1mol / L HCl solution, the tail gas absorption device A is connected to the tail gas absorption device B, and the tail gas absorption device B is built with a NaOH solution with an absorption liquid of 0.5 mol / L;

[0038] (3) Raise the temperature to 300°C at a heating rate of 5°C / min, maintain the flow rate and continue to feed the pretreatment gas for 20 minutes, maintain the gas flow rate, and when the temperature reaches 20°C, feed in chlorine gas with a specifi...

Embodiment 2

[0042] A battery recycling method not fully extracted, comprising the following specific steps:

[0043] (1) The waste battery is discharged, coarsely crushed, pyrolyzed, and finely crushed in sequence to obtain waste battery powder.

[0044](2) Put the waste battery powder in a closed tube furnace, and flow helium gas with a specification of 99.999% at a flow rate of 20mL / min at 30°C for 20 minutes. The gas outlet is connected to the exhaust gas absorption device A, which has a built-in The absorption liquid is 0.2mol / L HCl solution, the tail gas absorption device A is connected to the tail gas absorption device B, and the tail gas absorption device B is built with a KOH solution with an absorption liquid of 0.7 mol / L;

[0045] (3) Raise the temperature to 350°C at a heating rate of 5°C / min, maintain the flow rate and continue to feed the pretreatment gas for 40min, maintain the gas flow rate, and after cooling down to 30°C, feed the chlorine gas with a specification of 99.99...

Embodiment 3

[0049] A battery recycling method not fully extracted, comprising the following specific steps:

[0050] (1) Discharging, coarsely crushing, pyrolyzing, and finely crushing waste batteries in sequence to obtain waste battery powder;

[0051] (2) Put the waste battery powder in a tube furnace, seal it, and pass in argon gas with a specification of 99.999% at a flow rate of 30mL / min at 40°C for 30 minutes, and connect the gas outlet to the exhaust gas absorption device A, which has a built-in The absorption liquid is 0.3mol / L HCl solution, the tail gas absorption device A is connected to the tail gas absorption device B, and the tail gas absorption device B is built with a KOH solution whose absorption liquid is 1mol / L;

[0052] (3) Raise the temperature to 400°C at a heating rate of 5°C / min, maintain the flow rate and continue to feed the pretreatment gas for 60 minutes, maintain the gas flow rate, and when the temperature reaches 40°C, feed in chlorine gas with a specification...

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Abstract

The invention belongs to the technical field of resource recovery, and discloses an incomplete extraction battery recovery method. The method comprises the following steps of: introducing a pretreatment gas into equipment containing waste battery powder, and sequentially introducing an absorption liquid A and an absorption liquid B through a gas outlet; raising the temperature, introducing the pretreatment gas, cooling, introducing a reaction gas, raising the temperature, introducing the reaction gas, introducing the pretreatment gas, cooling and closing the pretreatment gas; adding an extractant into the absorption liquid A for mixing, taking an organic phase A, adding a back extractant, and taking a water phase A; and adjusting the pH value to be acidic, then adding the back extractant,taking an organic phase B, and adding the back extractant, so as to obtain a stock solution enriched with Li, Mn, Ni and Co, wherein the pretreatment gas is at least one of a nitrogen gas, a helium gas, an argon gas or a neon gas; the reaction gas is a chlorine gas, a fluorine gas or a bromine gas; the absorption liquid A is an acid liquor; and the absorption liquid B is an alkali liquor. Different from a waste battery full-extraction recovery process, the method disclosed by the invention has the advantages that an incomplete extraction recovery method is adopted, chloridizing volatilizationreaction is firstly carried out, then an extraction mode is adopted to extract the required metal elements Li, Mn, Ni and Co, and the extraction rate is 99.86-99.98%.

Description

technical field [0001] The invention belongs to the technical field of resource recovery, and in particular relates to a battery recovery method with incomplete extraction. Background technique [0002] Under the vigorous promotion of the new energy vehicle policy, the production of new energy vehicles has increased year by year, and has formed a very large scale. At the same time, the amount of scrapped new energy vehicles is also increasing year by year, and the power battery mounted on scrapped new energy vehicles is a very considerable resource that is currently the focus of recycling, especially the recycling value of nickel-cobalt-manganese ternary material batteries. maximum. The four elements of nickel, cobalt, manganese, and lithium are the main recycling objects of ternary battery materials. The nickel, cobalt, manganese, and lithium elements in lithium-ion batteries are processed through the development of recycling processes to improve the recovery rate of eleme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00H01M10/54H01M4/1391C22B26/12C22B47/00C22B23/00C22B3/38
CPCC22B7/006C22B1/005H01M10/54H01M4/1391C22B26/12C22B47/00C22B23/0453C22B3/383C22B3/3842Y02W30/84Y02P10/20Y02E60/10C22B1/08C22B3/10C22B7/001C22B7/005C22B1/02C22B1/24
Inventor 余海军彭挺谢英豪张学梅
Owner GUANGDONG BRUNP RECYCLING TECH