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Method of performing oxidation treatment on waste lithium ion batteries

A lithium-ion battery, oxidation treatment technology, applied in the direction of battery recycling, recycling of waste collectors, improvement of process efficiency, etc., can solve the problems of high energy consumption, complicated procedures, and complicated operations in the process, and achieve low operating costs and ease of operation The effect that the burden and operation safety are high

Inactive Publication Date: 2019-06-07
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method realizes the efficient recovery and utilization of lithium resources in lithium-containing wastewater, but the process is complicated, the operation is complex and time-consuming, and at the same time, high-temperature roasting operation is used to prepare lithium manganate, and the process consumes a lot of energy.

Method used

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  • Method of performing oxidation treatment on waste lithium ion batteries

Examples

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Comparison scheme
Effect test

Embodiment 1

[0044] 1) Mixing preheating: Add the lithium cobalt oxide positive electrode material that has been mechanically crushed to a size below 200 mesh into dilute sulfuric acid aqueous solution with a concentration of 0.05mol / L, and heat to 75°C to prepare a mixed slurry with a solid-to-liquid ratio of 10g / L;

[0045] 2) Aeration oxidation: use a titanium rod-shaped microporous aeration device to introduce oxygen into the mixed slurry obtained in step 1), the diameter of the aeration micropores is 10 μm, the gas flow rate is controlled to 0.1L / min, and magnetic stirring is applied. 400rpm, carry out aerated oxidation for 10h, add 1mol / L NaOH to the system to adjust the pH of the solution to 10.34 after the reaction is completed, and obtain the reaction slurry;

[0046] 3) Solid-liquid separation: The reaction slurry obtained in step 2) is subjected to solid-liquid separation to obtain cobalt-rich reaction tailings and a lithium-containing purification solution. ICP was used to me...

Embodiment 2

[0049] 1) Mixing preheating: add the lithium manganate positive electrode material that is mechanically crushed to below 200 mesh into the dilute sulfuric acid aqueous solution with a concentration of 0.25mol / L, and heat to 90°C to prepare a mixed slurry with a solid-to-liquid ratio of 20g / L;

[0050] 2) Aeration and oxidation: use a titanium rod-shaped microporous aeration device to pass air into the mixed slurry obtained in step 1), the diameter of the aeration micropores is 25 μm, the gas flow rate is controlled to 1.2 L / min, apply mechanical stirring, and the stirring rate 500rpm, carry out aerated oxidation 5.5h, add ammoniacal liquor to the system after the reaction finishes and adjust the solution pH to 8.0, obtain reaction slurry;

[0051] 3) Solid-liquid separation: The reaction slurry obtained in step 2) is subjected to solid-liquid separation to obtain manganese-rich reaction tailings and a lithium-containing purification solution. ICP was used to measure the cont...

Embodiment 3

[0054] 1) Mixing preheating: add the NCA111 powder after alkali leaching treatment to dilute hydrochloric acid with a concentration of 0.50mol / L, and heat it to 60°C to prepare a mixed slurry with a solid-to-liquid ratio of 15g / L;

[0055] 2) Aeration oxidation: use a plate-shaped microporous aeration device made of PTFE to pass a mixture of oxygen and ozone into the mixed slurry obtained in step 1), the diameter of the aeration micropores is 50 μm, and the gas flow rate is controlled to 1.5L / min. The volume ratio of oxygen to ozone is 19:1, apply mechanical stirring, the stirring rate is 350rpm, carry out aerated oxidation for 2.0h, add Na to the system after the reaction is completed 2 CO 3 And NaOH solid solution pH is adjusted to 9.8, obtains reaction slurry;

[0056] 3) Solid-liquid separation: The reaction slurry obtained in step 2) is subjected to solid-liquid separation to obtain reaction tailings rich in nickel, cobalt and aluminum and a lithium-containing purificati...

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Abstract

The invention relates to a method of performing oxidation treatment on waste lithium ion batteries, and belongs to the technical field of environment. The method comprises the following steps of adding waste lithium ion battery powder into an acidic water solution to obtain mixed slurry; inputting oxidizing gas to the mixed slurry with an aerating device, and performing oxidizing leaching; after areaction is completed, regulating the pH of the reaction slurry with an acid regulating reagent to remove few valuable metal ions in lixivium, and then performing solid-liquid separation to obtain lithium-enriched purifying liquid and reaction tailings; and then performing lithium sinking and solid-liquid separation on the purifying liquid so as to obtain lithium carbonate products or lithium phosphate products. Through the adoption of the method disclosed by the invention, through an aeration means, under a milder condition, high-selectivity extraction of lithium elements in the waste lithium ion batteries is realized; the reaction process is green and clean, simple and easy to operate, and wide in application range; and the lithium extraction rate is 85% or above, and the extracting selectivity is 95% or above, so that the problem that in a conventional processing method, lithium resources cannot be economically and effectively recovered can be solved from the source.

Description

technical field [0001] The invention relates to the technical field of recycling lithium resources in lithium-ion battery waste, in particular to an advanced oxidation treatment method for waste lithium-ion batteries. Background technique [0002] Lithium-ion batteries are widely used in 3C digital products such as mobile phones, notebook computers, digital cameras, electric vehicles, and energy storage due to their advantages such as high energy, light weight, long cycle life, and no memory effect. In 2011 alone, the production of lithium-ion batteries in my country was as high as 2.9 billion. Accompanied by it, the generation of a large number of waste lithium-ion batteries has posed a severe challenge to the electronic waste disposal and environmental protection in my country and the world. On the one hand, waste lithium-ion batteries contain toxic and flammable electrolytes, heavy metals and other harmful components. Lithium, cobalt, nickel, manganese, copper, aluminum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/12H01M10/54
CPCY02P10/20Y02W30/84
Inventor 孙峙王中行曹宏斌郑晓洪张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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