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Grading recovery method of waste ternary lithium battery

A ternary lithium battery and recycling method technology, applied in battery recycling, waste collector recycling, recycling technology and other directions, can solve the problems of multiple chemical reagents, cobalt loss, unfavorable extraction and separation, etc., to improve the extraction recovery rate, facilitate the The effect of recycling and reducing consumption

Active Publication Date: 2021-01-26
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the P204 extraction method needs to consume organic reagents, which will cause part of the loss of cobalt in the extraction process; Me-OH - -NH 3 -CO 3 2- The selective precipitation method of the complex system will introduce a large amount of ammonium ions, which is unfavorable for the subsequent extraction and separation of cobalt and nickel, and this method can only prepare crude manganese carbonate, which will also cause the loss of cobalt and nickel; potassium permanganate oxidation precipitation The law will introduce potassium ion impurities
In this way, the current recycling of waste ternary lithium batteries consumes a large amount of chemical reagents, and at the same time the extraction rate of valuable metal elements in ternary lithium batteries is low

Method used

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  • Grading recovery method of waste ternary lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Put the waste ternary lithium battery into an alkaline discharge battery containing a lithium hydroxide solution with a hydroxide concentration of 0.5mol / L for alkaline immersion discharge operation, wherein the alkaline immersion time is 20h;

[0089] After the discharged waste ternary lithium battery is naturally air-dried, it is sent to the cutting machine, and the cutting and crushing operation is carried out in a closed and negative pressure environment, so that the internal space of the battery core of the waste ternary lithium battery is opened, and the waste ternary lithium battery The electrolyte in the battery cell of the lithium battery is exposed to the outside; at the same time, the waste gas generated during the cutting and crushing process is passed into a cold trap at -10°C, in which the cold trap is also connected to a container with a molar concentration of 1mol / L. Tail gas absorption device for NaOH solution;

[0090] Under the temperature condition o...

Embodiment 2

[0101] Put the waste ternary lithium battery into an alkaline discharge battery containing a sodium hydroxide solution with a hydroxide concentration of 1.0mol / L for alkaline immersion discharge operation, wherein the time of alkali immersion is 50h;

[0102] After the discharged waste ternary lithium battery is naturally air-dried, it is sent to the cutting machine, and the cutting and crushing operation is carried out in a closed and negative pressure environment, so that the internal space of the battery core of the waste ternary lithium battery is opened, and the waste ternary lithium battery The electrolyte in the battery cell of the lithium battery is exposed to the outside; at the same time, the waste gas generated during the cutting and crushing process is passed into a -8°C cold trap, and the cold trap is connected behind the cold trap to accommodate a molar concentration of 3mol / L. Tail gas absorption device for NaOH solution;

[0103] At a temperature of 450°C, the ...

Embodiment 3

[0114] Put the waste ternary lithium battery into the alkaline discharge battery containing potassium hydroxide solution with a hydroxide concentration of 3.0mol / L for alkaline immersion discharge operation, wherein the time of alkaline immersion is 240h;

[0115] After the discharged waste ternary lithium battery is naturally air-dried, it is sent to the cutting machine, and the cutting and crushing operation is carried out in a closed and negative pressure environment, so that the internal space of the battery core of the waste ternary lithium battery is opened, and the waste ternary lithium battery The electrolyte in the battery cell of the lithium battery is exposed to the outside; at the same time, the waste gas generated during the cutting and crushing process is passed into a cold trap at -5°C, in which the cold trap is connected to a container with a molar concentration of 5mol / L. Tail gas absorption device for NaOH solution;

[0116] At a temperature of 550°C, the cut...

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Abstract

A step-by-step recycling method for waste ternary lithium batteries. After the waste ternary lithium batteries are subjected to alkaline immersion discharge, drying, cutting and crushing operations, the internal space of the battery core is opened and the electrolyte is exposed to the outside, and the organic impurities are removed by heating. Evaporate, and then vibrate and sieve to obtain a sieved mixture, mix the sieved mixture with inorganic acid and water, add a reducing agent and adjust the pH value, filter after aging to obtain the The first filtrate, after adding different materials and chemical reagents, or controlling the pH value, carries out hierarchical extraction of manganese ions, cobalt ions, nickel ions and lithium ions, and extracts and recovers each valuable metal element respectively. Compared with extracting each valuable metal element separately, the graded recovery method of the waste ternary lithium battery provided by the present invention greatly reduces the consumption of chemical reagents, and at the same time greatly improves the extraction recovery rate of each valuable metal element, which is beneficial to the follow-up further recycling.

Description

technical field [0001] The invention relates to the field of lithium ion battery recycling, in particular to a graded recycling method for waste ternary lithium batteries. Background technique [0002] At present, in the pretreatment stage of waste lithium battery recycling methods, incineration is usually used to burn off the electrolyte and remove polyvinylidene fluoride at the same time. However, this high-temperature treatment method will melt the aluminum foil of waste lithium batteries, cover the active materials, and even Lithium aluminate is generated, and it is ultimately difficult to separate the active material from the aluminum foil and extract the valuable metal elements; there are also those that use physical methods to process waste lithium batteries for recycling, that is, to use the physical properties of materials such as magnetism and density to realize waste lithium battery materials. This method does not require the use of chemical reagents and has lower...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C22B1/00C22B3/38C22B7/00C22B23/00C22B26/12C22B47/00C01G45/02C01G53/04C01G51/10C01D15/08
CPCC01D15/08C01G45/02C01G51/10C01G53/04C22B1/005C22B7/008C22B23/0446C22B23/0461C22B23/0476C22B26/12C22B47/00C22B3/3842C22B3/3844C22B3/3846Y02W30/84Y02P10/20
Inventor 祝宏帅李亚德袁中直陈翔李刚
Owner EVE ENERGY CO LTD