A method for removing fluorine in nickel-cobalt-manganese solution

A nickel-cobalt-manganese solution technology, which is applied in the field of solution removal, can solve the problems of high corrosion of fluoride ion equipment, the inability to use a large amount of nickel-cobalt-manganese mixture to prepare ternary precursors, and high fluoride ion content, so as to achieve good removal effect , Guarantee recyclability and shorten the recycling process

A nickel-cobalt-manganese solution technology, which is applied in the field of solution removal, can solve the problems of high corrosion of fluoride ion equipment, the inability to use a large amount of nickel-cobalt-manganese mixture to prepare ternary precursors, and high fluoride ion content, so as to achieve good removal effect , Guarantee recyclability and shorten the recycling process

CN110669933BActive Publication Date: 2021-04-27JINCHI ENERGY MATERIALS CO LTD
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for removing fluorine in nickel-cobalt-manganese solution, comprising the following steps:

[0031] (1) Separation, crushing and screening of current collectors of waste lithium-ion batteries;

[0032] (2) Add pure water to the reaction tank A, then put the current collector obtained in step (1), stir, slowly add concentrated sulfuric acid until the current collector is completely dissolved, and control the pH value of the end point to 3, stop stirring, and let it stand for 10 minutes Press filtration to obtain acid leaching residue and aluminum-containing solution;

[0033] (3) Add the fluorine-containing nickel-cobalt-manganese solution (the nickel-cobalt-manganese sulfate solution after using fluoride to remove calcium and magnesium during the wet recovery of ternary positive electrode waste) into reaction tank B, heat to 40°C, stir, press aluminum The molar ratio of ions and fluoride ions is 1:3, adding aluminum-containing solution and a certain amount of ...

Embodiment 2

[0036] A method for removing fluorine in nickel-cobalt-manganese solution, comprising the following steps:

[0037] (1) Separation, crushing and screening of current collectors of waste lithium-ion batteries;

[0038] (2) Add pure water to the reaction tank A, then put the current collector obtained in step (1), stir, slowly add concentrated sulfuric acid until the current collector is completely dissolved, and control the pH value of the end point to 4, stop stirring, and let it stand for 30 minutes Press filtration to obtain acid leaching residue and aluminum-containing solution;

[0039] (3) Add fluorine-containing nickel-cobalt-manganese solution (when wet recovery of ternary precursor waste, use fluoride to remove calcium and magnesium sulfate nickel-cobalt-manganese solution) into reaction tank B, heat to 60°C, stir, press The molar ratio of aluminum ions to fluorine ions is 1:4. Add aluminum-containing solution and a certain amount of ammonia water, and control the pH ...

Embodiment 3

[0042] A method for removing fluorine in nickel-cobalt-manganese solution, comprising the following steps:

[0043] (1) Separation, crushing and screening of current collectors of waste lithium-ion batteries;

[0044] (2) Add pure water to the reaction tank A, then put the current collector obtained in step (1), stir, slowly add concentrated sulfuric acid until the current collector is completely dissolved, and control the pH value of the end point to 4, stop stirring, and let it stand for 30 minutes Press filtration to obtain acid leaching residue and aluminum-containing solution;

[0045] (3) Add the fluorine-containing nickel-cobalt-manganese solution (the nickel-cobalt-manganese sulfate solution after using fluoride to remove calcium and magnesium during wet recovery of nickel-cobalt-manganese waste) into reaction tank B, heat to 50°C, stir, press The molar ratio of aluminum ions to fluorine ions is 1:6, adding aluminum-containing solution and a certain amount of sodium h...

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Abstract

The invention provides a method for removing fluorine in a nickel-cobalt-manganese solution, belonging to the technical field of solution purification. A method for removing fluorine in a nickel-cobalt-manganese solution, comprising the following steps: separating, crushing, and screening a current collector of a waste lithium-ion battery; dissolving the current collector with an acid to obtain an aluminum-containing solution; adding the aluminum-containing solution to the fluorine-containing nickel-cobalt-manganese The solution is defluorinated to obtain fluorine-containing slag and nickel-cobalt-manganese solution after defluorination. According to the technical scheme provided by the present invention, the concentrations of fluoride ions and aluminum ions in the nickel-cobalt-manganese solution after defluoridation are all less than 0.01g / L; the nickel-cobalt-manganese content in the fluorine-containing slag is all lower than 0.5%; The aluminum-containing solution removes fluorine from the nickel-cobalt-manganese solution, realizing parallel processing of the current collector and battery positive electrode material during lithium-ion battery recycling, shortening the recycling process, and saving recycling costs; after the nickel-cobalt-manganese solution is defluorinated, it enters the subsequent process flow, There is basically no corrosion to the equipment. Moreover, the aluminum content of the nickel-cobalt-manganese solution after defluorination is extremely low, and no aluminum impurities are introduced in the whole defluorination process.

Description

technical field [0001] The invention relates to the technical field of solution removal of impurities, in particular to a method for removing fluorine in a nickel-cobalt-manganese solution. Background technique [0002] Lithium-ion batteries were born in the 1990s. Due to their advantages of high energy density, long cycle life, safety and environmental protection, they are widely used in new energy vehicles, communication base stations, mobile phones, notebook computers, cameras and other fields. With the rapid development of the new energy industry, the number of ternary nickel-cobalt-manganese hydroxide batteries is increasing rapidly, and the recycling of battery materials is imminent. In the process of recycling nickel, cobalt and manganese from waste power batteries, due to the incomplete separation of positive electrode powder and current collector in the pretreatment process and the pollution caused in the process of collection, storage and transportation, copper and...

Claims

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Application Information

Patent Timeline
27 Apr 2021
Publication
CN110669933B
IPC
C22B7/00; C22B21/00; C22B23/00; C22B47/00; C22B1/00; H01M10/54
CPC
C22B1/005; C22B7/007; C22B21/0023; C22B23/043; C22B23/0461; C22B47/00; H01M10/54; Y02W30/84
Inventors
张臻; 陈亮