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Recovery method for valuable metal in waste nickel-cobalt-manganese ternary lithium batteries

A ternary lithium battery, recycling method technology, applied in battery recycling, waste collector recycling, recycling technology and other directions, can solve the problems of low recycling rate, insufficient recycling process design, poor purity of recycled products, etc., and achieve high purity Effect

Inactive Publication Date: 2019-07-30
ZHEJIANG TIANNENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that the design of the recovery process is not fine enough, the recovery rate is low, and the purity of the recovered product is poor, a method for recovering valuable metals in waste nickel-cobalt-manganese ternary lithium batteries is provided

Method used

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  • Recovery method for valuable metal in waste nickel-cobalt-manganese ternary lithium batteries
  • Recovery method for valuable metal in waste nickel-cobalt-manganese ternary lithium batteries
  • Recovery method for valuable metal in waste nickel-cobalt-manganese ternary lithium batteries

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Experimental program
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Effect test

Embodiment 1

[0042] Discharge the recovered waste nickel-cobalt-manganese ternary lithium batteries first, and release the remaining power to avoid explosion or combustion during the crushing process. After crushing, the crushed material is carbonized at high temperature in a carbonization furnace to consume the organic matter, so that the remainder is mainly some metal elements. After carbonization, it is crushed again to make the electrode material into a powder, and then through wind selection, the powder selected by wind is mainly electrode material (hereinafter referred to as ternary black powder), which is used for the next step of processing, while the lithium battery The steel shell and the like become granular and can be recycled directly after being separated from the powder.

[0043] Ternary black powder test.

[0044] 1. Leaching:

[0045] 1. Take 200 grams of ternary black powder, and the composition test is shown in Table 1.

[0046] Table 1

[0047] Ni co mn...

Embodiment 2

[0091] Discharge the recovered waste nickel-cobalt-manganese ternary lithium batteries first, and release the remaining power to avoid explosion or combustion during the crushing process. After crushing, the crushed material is carbonized at high temperature in a carbonization furnace to consume the organic matter, so that the remainder is mainly some metal elements. After carbonization, it is crushed again to make the electrode material into a powder, and then through wind selection, the powder selected by wind is mainly electrode material (hereinafter referred to as ternary black powder), which is used for the next step of processing, while the lithium battery The steel shell and the like become granular and can be recycled directly after being separated from the powder.

[0092] Ternary black powder test.

[0093] 1. Leaching:

[0094] 1. Take 200 grams of ternary black powder, and the composition test is shown in Table 12.

[0095] Table 12

[0096] Ni co ...

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Abstract

The invention discloses a recovery method for valuable metal in waste nickel-cobalt-manganese ternary lithium batteries. According to the recovery method, Fe2+, Al3+, Ca2+ and Mg2+ are subjected to impurity removal before extraction is carried out, so that the purity of valuable metal products recovered in the following process is high. During cobalt extraction, the oil-water ratio is controlled to be (0.8-0.9):1, the saponification rate is controlled to be 55%-60%, compared with the prior art that the saponification rate is reduced and the oil-water ratio is properly reduced, cobalt in a water phase is controlled to be not completely extracted, a small amount of cobalt is still left in the water phase, thus, it is guaranteed that magnesium is not extracted up, and it is guaranteed that magnesium impurities in cobalt sulfate products reach standards. One step of magnesium extraction operation is added after cobalt extraction and before nickel extraction, residual magnesium is removed as much as possible, and the purity of nickel sulfate products obtained after nickel extraction is improved. A C272 extracting agent is used for magnesium extraction, by means of the characteristic that extraction isothermal curves of the C272 extracting agent on cobalt, magnesium and nickel are separated, the situation that only magnesium and cobalt are extracted and nickel is not extracted is controlled, and therefore magnesium and nickel are separated.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium-ion batteries, in particular to a method for recycling valuable metals in waste nickel-cobalt-manganese ternary lithium batteries. Background technique [0002] In recent years, with the deepening of my country's energy crisis, the enhancement of people's awareness of environmental protection, and the stimulation of government policy subsidies, the new energy automobile industry has developed rapidly. With the gradual maturity of hybrid electric vehicle technology and the gradual reduction of the cost of power batteries, major companies have gathered to enter the new energy vehicle industry. The rapid development of new energy vehicles has also led to a continuous increase in the output of power batteries. As of 2017, the total number of new energy vehicles promoted in my country has exceeded 1.8 million. The energy density of a single power battery has tripled compared with 2012,...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/00C22B3/38C22B47/00C22B23/00C22B26/12H01M10/54C01D15/08C01G45/10C01G51/10C01G53/10
CPCC01D15/08C01G45/10C01G51/10C01G53/10C22B1/005C22B7/007C22B23/00C22B26/12C22B47/00C22B3/3844C22B3/3846H01M10/54Y02W30/84Y02P10/20
Inventor 詹稳甄爱钢余心亮张景伟李斌陈健赵海敏陈红娟
Owner ZHEJIANG TIANNENG NEW MATERIAL CO LTD
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