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Lithium battery waste recycling method and application thereof

A lithium battery and waste technology, applied in the field of lithium battery waste recycling, can solve problems such as high requirements and increased cost

Active Publication Date: 2021-07-13
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is necessary to control the precipitation speed, solution concentration and other related conditions before precipitation, resulting in high requirements for operation and a corresponding increase in cost
[0005] Therefore, in view of the current situation that the existing waste lithium-ion batteries have not been effectively treated, research and development have been conducted to develop a lithium battery that is low in cost, easy to operate, and can extract and recover a variety of raw materials, especially high-purity cobalt-nickel-manganese crystals. The recycling method of waste has become very necessary and urgent

Method used

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  • Lithium battery waste recycling method and application thereof
  • Lithium battery waste recycling method and application thereof
  • Lithium battery waste recycling method and application thereof

Examples

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Embodiment 1

[0112] Such as Figure 1~4 Shown: figure 1 It is a schematic diagram of the technological process of performing multi-stage countercurrent washing on the reduced and calcined battery waste to obtain the lithium-rich solution and the black powder after lithium removal in this embodiment; figure 2 The schematic diagram of the technological process that the present embodiment utilizes the lithium-rich solution to reclaim aluminum hydroxide and crude lithium carbonate; image 3 It is a schematic diagram of the technological process of sequentially performing acid leaching, reduction leaching and copper ion removal on the black powder after lithium removal in this embodiment; Figure 4 It is a schematic diagram of the process flow for magnesium removal and cobalt-nickel-manganese mixed salt crystallization in this embodiment.

[0113] A method for recycling lithium battery waste, said method comprising the following steps:

[0114] (1) After the lithium battery waste is obtaine...

Embodiment 2

[0141] A method for recycling lithium battery waste, said method comprising the following steps:

[0142] (1) After the lithium battery waste is obtained, it is discharged and crushed into particles with a particle size of 180 μm; then hydrogen or natural gas is introduced at 700 ° C for reduction and calcination for 6 hours, and the ventilation rate is 5 m 3 / h. After calcining, the material is crushed and sieved to obtain particles with a particle size of 120 μm;

[0143] Using the countercurrent washing method to carry out multi-stage counter-current washing on the battery waste after the reduction and calcination treatment, using 4-stage washing, the initial solution is a weakly acidic pH=6 sulfuric acid solution, and the end point is pH=10 after multi-stage washing. The solid-to-liquid ratio is controlled by the pH value to 1:3 (the aqueous solutions at all levels are set to reflux to prevent the high impurity content caused by pH fluctuations). The leaching rate of lit...

Embodiment 3

[0169] A method for recycling lithium battery waste, said method comprising the following steps:

[0170] (1) After the lithium battery waste is obtained, it is discharged and crushed into particles with a particle size of 180 μm; then hydrogen or natural gas is introduced at 500°C for reduction and calcination for 4 hours, and the ventilation rate is 15m 3 / h. After calcining, the material is crushed and sieved to obtain particles with a particle size of 150 μm;

[0171] Using the countercurrent washing method to carry out multi-stage counter-current washing on the battery waste after the reduction and calcination treatment, using 4-stage washing, the initial solution is a weakly acidic pH=8 sulfuric acid solution, and the end point is pH=12 after multi-stage washing. The solid-to-liquid ratio is controlled by the pH value to 1:5 (the aqueous solutions at all levels are set to reflux to prevent the high impurity content caused by pH fluctuations). The leaching rate of lithi...

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Abstract

The invention provides a lithium battery waste recycling method and application thereof, and relates to the technical field of waste battery recycling. The method comprises the following steps that firstly, reflux extraction is carried out on lithium battery waste by utilizing a countercurrent washing method to obtain a lithium-rich solution and lithium-removed black powder; then the lithium-rich solution and the lithium-removed black powder are treated respectively, aluminum hydroxide and crude lithium carbonate are extracted from the lithium-rich solution through precipitation and reduction methods, and meanwhile, the lithium-removed black powder is subjected to acid dissolution leaching before reduction leaching; metal impurity ions except cobalt, nickel and manganese in a leaching solution are removed by combining the oxidation-reduction property of metal with the modes of extraction, precipitation and the like; and finally, concentrating and crystallizing are carried out, and cobalt-nickel-manganese mixed salt crystals with high manganese content and cobalt-nickel-manganese mixed salt crystals with high cobalt and nickel contents are respectively prepared by utilizing a hot filtering method and a cooling filtering method. The recycling method has the advantages of being simple in technological process and easy to operate, and the purpose of comprehensively recycling valuable metal from the lithium battery waste is achieved.

Description

technical field [0001] The invention relates to the technical field of waste battery recycling, in particular to a recycling method and application of lithium battery waste. Background technique [0002] Lithium-ion batteries are widely used in various electronic equipment fields due to their high working voltage and specific energy, stable discharge voltage, light weight and small size, long cycle life, and no memory effect. In recent years, as the production of lithium-ion batteries has increased, the amount of waste has also increased year by year. The lifespan of lithium-ion batteries is generally 3 to 5 years. At present, the recycling system has not yet reached a large scale. Most of the waste lithium-ion batteries have not been effectively treated, which not only pollutes the environment, but also wastes a lot of useful resources. [0003] Although there are some recycling methods for lithium ion batteries in the prior art, they are generally acid or alkali leaching ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02
CPCC22B7/007C22B7/006C22B1/02Y02P10/20Y02W30/84
Inventor 张颖秦汝勇黄亚祥郑江峰钟晖
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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