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Grading recovery method for waste ternary lithium battery

A ternary lithium battery, recycling method technology, applied in battery recycling, recycling technology, lithium carbonate;/acid carbonate and other directions, can solve the problems of multiple chemical reagents, cobalt loss, unfavorable extraction and separation, etc. Achieve the effect of improving the extraction recovery rate, facilitating recycling and reducing consumption

Active Publication Date: 2019-01-11
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 for 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

Disclosed is a grading recovery method for a waste ternary lithium battery. After the waste ternary lithium battery is subjected to alkaline leaching discharging, drying and cutting crushing operation, the internal space of a battery cell is opened, and an electrolyte is exposed outside; organic impurities are evaporated through heating, then a sieved mixture is obtained through oscillation sieving, the sieved mixture is mixed with inorganic acid and water, then a reducing agent is added, the pH value is regulated, and after aging, a first filtrate rich in lithium ion, nickel ion, cobalt ion and manganese ion is obtained through filtering; and by adding different materials and chemical agents or controlling the pH value, manganese ions, cobalt ions, nickel ions and lithium ions are subjected to grading extraction, and all valuable metal elements are extracted and recovered. According to the grading recovery method for the waste ternary lithium battery, compared with the mode that all the valuable metal elements are extracted separately, the consumption quantity of the chemical agents is greatly decreased, meanwhile, the extraction and recovery rates of all the valuable metal elements are further greatly increased, and subsequent further recycling is facilitated.

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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IPC IPC(8): C22B1/00C22B3/38C22B7/00C22B23/00C22B26/12C22B47/00C01G45/02C01G53/04C01G51/10C01D15/08
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
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