A kind of method for recovering copper, aluminum and iron in the leach solution of waste lithium ion battery

A lithium ion battery and leaching solution technology, which is applied in the fields of aluminum and waste lithium ion battery leaching solution to recover copper and iron respectively, can solve the problems of low nickel and cobalt activity, high nickel and cobalt content, low replacement efficiency, etc., and achieve the replacement rate. The effect of fast, high activity and fast filtration rate

Active Publication Date: 2022-02-18
GUANGDONG BRUNP RECYCLING TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the process uses nickel powder or cobalt powder to replace and remove copper, because the activity of nickel and cobalt is not high, the replacement efficiency is low, and the content of nickel and cobalt in the copper slag is relatively high.

Method used

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  • A kind of method for recovering copper, aluminum and iron in the leach solution of waste lithium ion battery
  • A kind of method for recovering copper, aluminum and iron in the leach solution of waste lithium ion battery
  • A kind of method for recovering copper, aluminum and iron in the leach solution of waste lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A method for reclaiming copper, aluminum and iron in the leach solution of waste lithium-ion batteries comprises the following steps:

[0062] (1) Copper removal once

[0063] Take 1L of sulfuric acid leaching solution of waste lithium-ion batteries (main metals: Ni: 46.8g / L, Co: 36.93g / L, Mn: 10.62g / L, impurity Cu: 1.9177g / L), adjust pH=2.8, water bath temperature 60 ℃, add 2g of manganese powder, stir and react for 1h, filter to obtain the first copper removal liquid and sponge copper, detect the Cu in the first copper removal liquid: 0.1567g / L, and the copper content of the obtained sponge copper is 80.46% after rinsing with water.

[0064] (2) Deep copper removal

[0065] Add 1.5g of manganese powder to the primary copper removal solution obtained in step (1), stir at 60°C for 1 hour, filter to obtain the copper removal solution and secondary sponge copper, and detect Cu in the copper removal solution: 0.4mg / L, Optionally, secondary sponge copper is added to the l...

Embodiment 2

[0076] A method for reclaiming copper, aluminum and iron in the leach solution of waste lithium-ion batteries comprises the following steps:

[0077] (1) Copper removal once

[0078] Take 1L of sulfuric acid leaching solution of waste lithium-ion batteries (main metals: Ni: 45.54g / L, Co: 49.44g / L, Mn: 22.57g / L, impurity Cu: 4.2943g / L), adjust pH=3.0, water bath temperature 70 ℃, add 3.7g of manganese powder, stir and react for 1h, filter to obtain the first copper removal solution and sponge copper, detect the Cu in the first copper removal solution: 0.0518g / L, and the copper content of the obtained sponge copper is 84.61% after rinsing with water.

[0079] (2) Deep copper removal

[0080] Add 1g of manganese powder to the liquid after copper removal obtained in step (1), stir at 70°C for 1h, filter to obtain the liquid after copper removal and secondary sponge copper, and detect Cu in the liquid after copper removal: 0.6mg / L, which can be Optionally, the secondary sponge co...

Embodiment 3

[0091] A method for reclaiming copper, aluminum and iron in the leach solution of waste lithium-ion batteries comprises the following steps:

[0092] (1) Copper removal once

[0093] Take 1L of sulfuric acid leaching solution of waste lithium-ion batteries (main metals: Ni: 14.97g / L, Co: 57.69g / L, Mn: 10.28g / L, impurity Cu: 2.8818g / L), adjust pH=2.5, water bath temperature 80 ℃, add 2.4g of manganese powder, stir and react for 1h, filter to obtain the copper-removed liquid and sponge copper, detect Cu in the liquid after copper-removal once: 0.1364g / L, and the copper content of the obtained sponge copper is 82.12% after rinsing with water.

[0094] (2) Deep copper removal

[0095] Add 2g of manganese powder to the liquid after copper removal obtained in step (1), stir at 80°C for 1h, filter to obtain the liquid after copper removal and secondary sponge copper, and detect Cu in the liquid after copper removal: 0.2mg / L, which can be Optionally, the secondary sponge copper is a...

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Abstract

The invention relates to a method for recovering copper, aluminum and iron from the leaching solution of waste lithium-ion batteries, which comprises the following steps: adding manganese powder into the leaching solution of waste lithium-ion batteries to remove copper, and filtering to obtain copper-removing solution and sponge copper; adding nickel carbonate and / or cobalt hydroxide is added to the obtained solution after removing copper to adjust the pH value, and after stirring, filter to obtain the solution after removing aluminum and aluminum slag; add the oxidant to the solution after removing aluminum, and stir to obtain the solution after removing ferrous iron; method to remove iron to obtain a purification solution for removing copper, aluminum and iron. The invention uses manganese powder to replace copper, nickel carbonate or cobalt hydroxide to remove aluminum without introducing impurities, and the cost is low; aluminum is removed first and then goethite method is used to remove iron, which is beneficial to the high-value utilization of aluminum slag and iron slag; The invention has the advantages of simple technological process, environmental friendliness, high recovery rate of copper, aluminum, iron and other metals, low production cost and obvious economic benefits, and is conducive to promoting the recovery and development of lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of recycling waste lithium ion batteries, and relates to a method for removing impurities from waste lithium ion battery leaching solution and recycling, in particular to a method for separately recovering copper, aluminum and iron from waste lithium ion battery leaching solution. Background technique [0002] Lithium-ion batteries are widely used in many fields such as smart grids, electric vehicles, and large-scale energy storage materials; with the rapid development of the new energy vehicle market, their usage will increase significantly, but the cycle life of lithium-ion batteries is always limited. It means that the generation of waste lithium-ion batteries is also increasing year by year. Organic solvents and heavy metals such as cobalt and nickel in lithium-ion batteries will pollute soil, air, water, etc., which pose a great threat to the environment and are not conducive to sustainable development....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00C22B21/00H01M10/54C01F7/54C01G45/10
CPCC22B7/006C22B15/0089C22B21/0023H01M10/54C01G45/10C01F7/54C01P2004/03Y02W30/84Y02P10/20
Inventor 鲁俊雀王杜刘勇奇巩勤学谭运军李长东
Owner GUANGDONG BRUNP RECYCLING TECH
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