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Two-stage fluorine removal method for fluorine-containing material

A technology for materials and fluorine removal agents, which is applied in the fields of hydrometallurgy and resource recovery, can solve the problems of not being suitable for handling solutions with high fluorine content, long time for fluorine removal, and no method for efficient fluorine removal has been reported. The effect of high fluorine efficiency, avoiding large dosage and easy operation

Active Publication Date: 2021-01-26
취저우화여우코발트뉴머터리얼컴퍼니리미티드 +2
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  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has obvious fluoride removal effect, it takes a long time to remove fluoride and is not suitable for treating solutions with high fluorine content.
[0007] The existing hydrometallurgical defluorination process is mainly based on zinc sulfate solution and manganese sulfate solution, and there is no report on the efficient defluorination method of cobalt sulfate solution, nickel sulfate solution or cobalt, nickel and manganese mixed solution

Method used

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  • Two-stage fluorine removal method for fluorine-containing material

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Comparison scheme
Effect test

Embodiment 1

[0031]The fluorine-containing solid powder used in this embodiment is waste battery powder, and its main components are shown in Table 1:

[0032]Table 1 Main element content of raw materials (%)

[0033] element Co Ni Mn F content 16.0937.4116.581.40

[0034]1. Mix water and raw materials into a slurry according to the liquid-to-solid ratio of 3:1~10:1, and react for 0.5~3.5h under the conditions of 60~90℃ and stirring speed of 250rpm~400rpm. Add 10~18.4mol / during the reaction. L sulfuric acid adjusts the pH to control the end point pH of the reaction to be 0.5-2.5. After the reaction is over, the leachate and filter residue are obtained by vacuum suction filtration, and then the content of related elements in the leachate is measured. The content of the main elements is shown in Table 2:

[0035]Table 2 Main element content of leaching solution (g / L)

[0036] element Co Ni Mn F content 15.4631.8124.201.50

[0037]2. Take a certain volume of the leaching solution, add a calcium carbonate solu...

Embodiment 2

[0047]The fluorine-containing solid powder used in this embodiment is waste battery powder, and its main components are shown in Table 5:

[0048]Table 5 Main element content of raw materials (%)

[0049] element Co Ni Mn F content 16.0937.4116.581.40

[0050]1. Mix water and raw materials into a slurry according to the liquid-to-solid ratio of 3:1~10:1, and react for 0.5~3.5h under the conditions of 60~90℃ and stirring speed of 250rpm~400rpm. Add 10~18.4mol / during the reaction. L sulfuric acid adjusts the pH to control the end point pH of the reaction to be 0.5-2.5. After the reaction is over, the leachate and filter residue are obtained by vacuum filtration, and then the content of related elements in the leachate is measured. The content of the main elements is shown in Table 6:

[0051]Table 6 Main element content of leaching solution (g / L)

[0052] element Co Ni Mn F content 15.4631.8124.201.50

[0053]2. Take a certain volume of leaching solution, add 10%-30% calcium hydroxide solution a...

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Abstract

The invention belongs to the technical field of hydrometallurgy and resource recovery, and particularly relates to a fluorine removal method for a fluorine-containing material. The fluorine removal method comprises the following steps that 1), fluorine-containing solid powder containing one or two or more elements of cobalt, nickel and manganese is taken and leached with sulfuric acid to obtain fluorine-containing leachate; 2) a lime milk solution is added into the fluorine-containing leachate for carrying out neutralization reaction; 3) after the reaction is finished, filtering is carried outto obtain neutralized slag and a neutralized solution; (4) a fluorine removal agent is added into the neutralized solution for reaction; 5) after the reaction is finished, filtering is carried out toobtain a fluorine-removed solution and an acted fluorine-removed agent; and 6) regeneration treatment is carried out on the acted fluorine-removed agent by using a NaOH solution to obtain a regenerated fluorine removal agent. The method is simple and convenient in operation and high in fluorine removal efficiency, can reduce the fluorine content in the solution to be less than 10 mg / L, and is suitable for fluorine removal of a single cation solution system or a polycation solution system.

Description

Technical field[0001]The invention belongs to the technical field of hydrometallurgy and resource recovery, and particularly relates to a method for removing fluorine from fluorine-containing materials.Background technique[0002]Lithium-ion batteries have the advantages of high energy density, long cycle life, and no memory effect, and are widely used in 3C electronics, new energy vehicle power batteries and other fields. However, the life span of lithium-ion batteries is limited, and a large number of waste batteries will be produced when they have completed their service life. Waste lithium ion batteries contain more metals such as cobalt, nickel, manganese, and lithium, among which the content of cobalt can reach more than 15%. In natural cobalt ore, the grade of cobalt is extremely low. The vast majority of cobalt and copper, iron and other metals The formation of symbiotic ore, the content of cobalt in the ore is generally below 0.2%, the smelting cost is high, and my country is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B47/00H01M10/54
CPCC22B7/007C22B23/0461C22B47/00H01M10/54Y02W30/84
Inventor 丰丽琴洪涛谌生洪王荣龙刘仕
Owner 취저우화여우코발트뉴머터리얼컴퍼니리미티드
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