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Method for recovering valuable metals from ternary positive electrode material of waste power battery

A technology for positive electrode materials and power batteries, which is applied in the field of recovering valuable metals from waste power battery ternary positive electrode materials, and can solve the problem of low leaching rate of valuable metals, low purity, and high impurities in valuable metal oxides or metal salt solutions and other problems, to achieve the effect of less impurities, high purity, efficient and easy recovery method

Pending Publication Date: 2021-03-12
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the main purpose of the present invention is to provide a method for recovering valuable metals from waste power battery ternary positive electrode materials, which solves the problem of the low leaching rate of each valuable metal in the recovery process of the prior art, and the recovered Valuable metal oxide or metal salt solution contains a lot of impurities, which leads to low purity

Method used

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  • Method for recovering valuable metals from ternary positive electrode material of waste power battery
  • Method for recovering valuable metals from ternary positive electrode material of waste power battery
  • Method for recovering valuable metals from ternary positive electrode material of waste power battery

Examples

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Effect test

Embodiment 1

[0031] A recovery of valuable metals from waste power battery ternary positive electrode materials is achieved through the following steps:

[0032] Step 1. At 450°C, use a mixed reducing gas of hydrogen and nitrogen with a molar mass ratio of 3:1 to reduce the waste power battery ternary positive electrode material for 3 hours to obtain the reduced ternary positive electrode material;

[0033] Step 2, put the reduced ternary positive electrode material described in step 1 into water for water immersion, stir with a stirring speed of 100r / min for 0.5h during water immersion, and then filter to obtain a water leaching solution (lithium-containing leaching solution) and water leaching slag;

[0034] Step 3, the water leaching slag obtained in step 2 is sequentially passed through oxalic acid pickling and sulfuric acid pickling, wherein, during sulfuric acid pickling, it should be stirred at a stirring speed of 100r / min for 2h to obtain pickling solution (lithium-containing pickl...

Embodiment 2

[0039] A recovery of valuable metals from waste power battery ternary positive electrode materials is achieved through the following steps:

[0040] Step 1, at 350°C, use a mixed reducing gas of hydrogen and nitrogen with a molar mass ratio of 2:1 to reduce the waste power battery ternary positive electrode material for 4 hours, and obtain the reduced ternary positive electrode material;

[0041]Step 2, put the reduced ternary positive electrode material described in step 1 into water for water immersion, stir for 2.5h at a stirring speed of 50r / min during water immersion, and then filter to obtain a water leaching solution (lithium-containing leaching solution) and water leaching slag;

[0042] Step 3, the water leaching slag obtained in step 2 is sequentially passed through oxalic acid pickling and sulfuric acid pickling, wherein, during sulfuric acid pickling, it should be stirred at a stirring speed of 50r / min for 2.5h to obtain a pickling solution (lithium-containing pick...

Embodiment 3

[0047] A recovery of valuable metals from waste power battery ternary positive electrode materials is achieved through the following steps:

[0048] Step 1, at 650°C, use a mixed reducing gas of hydrogen and nitrogen with a molar mass ratio of 4:1 to reduce the waste power battery ternary positive electrode material for 2 hours, and obtain the reduced ternary positive electrode material;

[0049] Step 2, put the reduced ternary positive electrode material described in step 1 into water for water immersion, stir for 1.5h at a stirring speed of 150r / min during water immersion, and then filter to obtain a water leaching solution (lithium-containing leaching solution) and water leaching slag;

[0050] Step 3, the water leaching slag obtained in step 2 is sequentially passed through oxalic acid pickling and sulfuric acid pickling, wherein, during sulfuric acid pickling, it should be stirred at a stirring speed of 100r / min for 1.5h to obtain a pickling solution (lithium-containing p...

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Abstract

The invention discloses a method for recovering valuable metals from a ternary positive electrode material of a waste power battery. The method comprises the following steps of 1) carrying out reduction treatment on the waste ternary positive electrode material; 2) putting the reduced ternary positive electrode material into water for water leaching to obtain a water leaching solution and water leaching residues; 3) sequentially carrying out acid pickling and sulfuric acid leaching on the leaching residues to obtain an acid pickling solution and an acid-leached nickel-cobalt-manganese sulfuricacid solution; 4) combining the water leaching solution with a pickling solution, and adding a precipitant for precipitation to obtain Li2CO3 precipitate; 5) adjusting the pH value of the acid-leached nickel-cobalt-manganese sulfuric acid solution by using sodium hydroxide, and adding KMnO4 into the adjusted system for precipitation reaction to obtain a cobalt-nickel solution and MnO2 precipitate; and 6) extracting the cobalt-nickel solution to obtain a nickel-containing salt solution and a cobalt-containing salt solution. Each valuable metal compound or metal salt solution recovered by the method provided by the invention has less impurities and high purity.

Description

technical field [0001] The invention belongs to the technical field of recovering valuable metals from waste battery materials, and in particular relates to a method for recovering valuable metals from waste power battery ternary positive electrode materials. Background technique [0002] Discarded power batteries contain a large amount of valuable metals, which will not only cause a great waste of cobalt, nickel, manganese, lithium and other resources, but also seriously pollute the environment. Therefore, there is an urgent need for a green, pollution-free, Industrialized processing methods can be planned on a large scale. A large number of literatures have reported the recycling and recycling of scrapped power batteries. The research and application of the wet treatment process for waste batteries is the most extensive, accounting for 57.25% of the literature statistics and patent statistics. After acid dissolution under the condition of solvent, the nickel, cobalt, mang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B26/12C22B23/00C22B47/00H01M10/54
CPCC22B7/006C22B7/007C22B1/005C22B26/12C22B23/043C22B23/0461C22B47/00H01M10/54Y02W30/84Y02P10/20
Inventor 蒋振康郭苗苗龙小林胡忆杨航
Owner JINGMEN GEM NEW MATERIAL
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