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Method for recovering iron and aluminum from waste ternary lithium ion battery

A lithium-ion battery and iron recovery technology, applied in the field of aluminum and iron recovery, can solve the problems of not clearly adjusting the pH value, difficult to ensure product quality, loss of valuable components, etc. The effect of green process

Inactive Publication Date: 2019-11-22
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent does not specify the type of lye to adjust the pH value, and the actual effect of removing aluminum is relatively poor
Since it is difficult to guarantee product quality in one-time removal of aluminum, a second-level deep removal of aluminum is required, and the loss of valuable components is large

Method used

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  • Method for recovering iron and aluminum from waste ternary lithium ion battery
  • Method for recovering iron and aluminum from waste ternary lithium ion battery
  • Method for recovering iron and aluminum from waste ternary lithium ion battery

Examples

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Embodiment 1

[0044] (1) Leaching reaction: using the method described in the patent CN201710386055.4, after crushing the waste ternary lithium-ion battery, adding sulfuric acid and hydrogen peroxide to it, stirring and reacting to obtain a leachate, the pH of the leachate is 0.5-1.5.

[0045] (2) Copper removal reaction: use sodium hydroxide aqueous solution, adjust the pH value of the leachate to 2.5, then heat the leachate to 50°C, and then add iron powder with a particle size of 100-500 mesh. The actual amount of iron powder added is 1.2 times of the theoretical amount, and after stirring and reacting for 4 hours, it is filtered to obtain crude copper powder and copper removal solution.

[0046] (3) Removal of iron and aluminum: add sodium chlorate as an oxidant to the copper removal solution, and the actual amount of oxidant added is 1.1 times of the theoretical amount added. Then the reaction system was heated to 85°C and saturated aqueous sodium carbonate solution was added to make F...

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Abstract

The invention provides a method for recovering iron and aluminum from a waste ternary lithium ion battery, which comprises the following steps: crushing the waste ternary lithium ion battery, adding sulfuric acid and hydrogen peroxide into the crushed waste ternary lithium ion battery, and stirring to react to obtain a leachate; adding iron powder into the leachate, performing a stirring reaction,and filtering to obtain crude copper powder and copper removal liquid; successively adding an oxidizing agent and alkali carbonate into the copper removal liquid, and performing heat-preservation aging and filtration to obtain iron-aluminum slag and purified liquid. The iron-aluminum slag obtained through the method is good in gathering effect, and the removal rate of iron and aluminum is high.In addition, alkali carbonate is used for replacing alkali in the prior art in the iron and aluminum removing process, the technological process is environmentally friendly, and the recycling cost islow.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering iron and aluminum from waste ternary lithium ion batteries. Background technique [0002] Chinese patents with application numbers CN201510071447.2, CN201611060474.0, and CN201710386055.4 all disclose the recovery of nickel, cobalt and manganese in ternary lithium-ion batteries by liquid phase methods, including crushing waste ternary lithium-ion batteries and leaching them with acid , remove the iron and aluminum elements, and continue to process to obtain the precursor of the ternary cathode material. The methods for removing iron and aluminum in the above patents include extraction method for removing iron and aluminum, ferroalum method for removing iron and aluminum, and direct precipitation method for removing iron and aluminum. These methods for removing iron and aluminum have the disadvantages of high parameter control requirements, high lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00C22B21/00
CPCC22B7/006C22B7/007C22B21/0023H01M10/54Y02P10/20Y02W30/84
Inventor 周文斌王九飙陈龙石秋成张青
Owner GREE ELECTRIC APPLIANCES INC
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