The method for removing magnetic substance from lithium carbonate slurry

A technology of lithium carbonate and magnetic substances, which is applied in the direction of separation methods, chemical instruments and methods, lithium carbonate; Effects of reduced demagnetization pressure and high demagnetization efficiency

Active Publication Date: 2021-06-25
青海东台吉乃尔锂资源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to efficiently remove magnetic impurities in lithium carbonate materials is difficult in technology

Method used

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  • The method for removing magnetic substance from lithium carbonate slurry
  • The method for removing magnetic substance from lithium carbonate slurry

Examples

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Comparison scheme
Effect test

no. 1 approach

[0065] figure 1 Shown is a process flow according to one embodiment of the present invention, and the lithium carbonate demagnetization device used in the process flow includes a first-stage slurry washing demagnetization system.

[0066] Such as figure 1 As shown, the starch washing and demagnetization system 100 includes a filter mechanism 101 , a filter recovery mechanism 102 , a starch washing mechanism 103 , a steam filter mechanism 104 , a crushing mechanism 105 and a demagnetization mechanism 106 .

[0067] The filter mechanism 101 may mainly include a plate and frame filter press. It is used in the first stage of pulp washing to separate the lithium carbonate slurry generated in the conversion lithium precipitation section from solid to liquid to obtain a filter cake and filtrate containing impurities, wherein the filter cake enters the pulp washing mechanism 103 of this stage, and the impurity-containing filtrate is obtained. The filtrate of impurities enters the fi...

no. 2 approach

[0078] figure 2 Shown is a process flow according to another embodiment of the present invention, the lithium carbonate demagnetization device used in the process flow comprises a three-stage slurry washing demagnetization system.

[0079] exist figure 2 Among them, the 2nd and 3rd stage washing and demagnetizing systems are the same as the 1st stage washing and demagnetizing system, and the technological process adopted is also the same, and the process parameters can be the same or different. Among them, the filter mechanism of the second stage and the third stage is connected to the lithium carbonate slurry processed by the previous stage of starch washing and demagnetization system, and the same treatment as in the first stage of starch washing and demagnetization system (filtering, starch washing, crushing, demagnetization), realize three-stage demagnetization by pulp washing, and obtain the final demagnetization product 6 (lithium carbonate slurry demagnetized by pulp...

Embodiment

[0082] Hereinafter, the present invention will be described in detail with reference to Examples to specifically describe the present invention. However, the embodiments of the present invention may be modified into various other forms and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided so as to more fully describe the present invention to those skilled in the art.

[0083] Unless otherwise specified, the equipment or raw materials in the following examples can be obtained from commercial channels such as general markets or can be easily obtained by self-made.

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Abstract

The present invention relates to a kind of method for removing magnetic substance from Lithium Retard slurry, described method comprises the steps: (1) Lithium Retard Slurry is transported to the 1st stage filter mechanism and filters, obtains Lithium Retard mixture filter cake; ( 2) pass into deionized water in the 1st stage starch washing mechanism, then all lithium carbonate mixture filter cakes of gained are added to described deionized water; (3) then in the 1st stage pulp washing mechanism The filter cake is stirred and washed to obtain a lithium carbonate slurry; at the same time, the purified steam is introduced, and then the lithium carbonate slurry is transported into the first-stage crushing mechanism for pulverization, and the pulverized lithium carbonate slurry is transported into the Go to the first-stage demagnetization mechanism for demagnetization, and circulate the demagnetized lithium carbonate slurry back to the first-stage pulp washing mechanism, thereby continuously and cyclically performing crushing, demagnetization and stirring washing. The method of the invention has high demagnetization efficiency and obvious effect.

Description

technical field [0001] The invention relates to the production field of lithium carbonate, in particular to a method for removing magnetic substances from lithium carbonate slurry. Background technique [0002] Lithium carbonate, an inorganic compound, is a colorless monoclinic crystal or white powder, and is currently the main raw material for lithium-ion batteries. Since the existence of magnetic substances in lithium carbonate products seriously threatens the safety of lithium-ion batteries, national standards and battery companies have very strict requirements on the content of magnetic substances in lithium carbonate products. The industry standard YS / T582-2013 requires magnetic substances to be ≤0.0003%, and battery companies generally require higher than this standard. It can be said that magnetic substances are the key indicators for whether battery-grade lithium carbonate can be achieved. [0003] In the production process of lithium carbonate, due to the presence ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D36/00C01D15/08
CPCB01D36/00C01D15/08
Inventor 王洪李健高松陈传勋贾国军李吉伟东宝山王启豪
Owner 青海东台吉乃尔锂资源股份有限公司
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