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Method for washing lithium carbonate

A technology of lithium carbonate and centrifugal washing, which is applied in the direction of separation methods, chemical instruments and methods, lithium carbonate; Removal and other issues

Active Publication Date: 2021-09-10
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

[0003] In the process of producing lithium carbonate, due to the characteristics of lithium carbonate itself, which is easy to agglomerate and stick, some impurities are wrapped and adhered to the material, making it difficult to remove deeply. The purification process of lithium carbonate is difficult and costly

Method used

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  • Method for washing lithium carbonate
  • Method for washing lithium carbonate
  • Method for washing lithium carbonate

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0087] figure 1 Shown is a process flow according to one embodiment of the present invention, and the lithium carbonate washing device used in the process flow includes a filter pulp washing and crushing system 100 and a centrifugal washing separation system 200.

[0088] (2.1) Filtration pulp washing and crushing system 100

[0089] like figure 1 As shown, the filter pulp washing and crushing 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 conveying mechanism 106 .

[0090] 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 ...

no. 2 approach

[0108] figure 2 Shown is a process flow according to another embodiment of the present invention, the lithium carbonate washing device used in the process flow includes three filter pulp washing and crushing systems 100 and two centrifugal washing and separation systems 200 .

[0109] exist figure 2 Among them, the pulp washing and crushing system of the second and third stages is the same as the pulp washing and crushing system of the first stage, and the technological process adopted is also the same. The same treatment (filtering, pulp washing, crushing) in the first-stage filter pulp washing and crushing system realizes three-stage filter pulp washing and crushing. After finishing the three-stage filtration, pulp washing and pulverization, the slurry is transported to the following centrifugal washing and separation system 200 by the conveying mechanism in the third-stage system.

[0110] exist figure 2Among them, two centrifugal washing and separating systems 200 ar...

Embodiment

[0112] 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.

[0113] 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 the method for washing lithium carbonate, described method comprises the steps: (1) lithium carbonate slurry is filtered; (2) pass into deionized water, then all lithium carbonate mixture filter cakes of gained are added to described In deionized water; (3) then stirring and washing to obtain the lithium carbonate slurry, while introducing purified steam; then the lithium carbonate slurry is pulverized, and the pulverized lithium carbonate slurry is recycled and then stirred Washing, pulverizing and stirring washing are carried out continuously and circularly; (4) Optionally, make the whole lithium carbonate slurry of gained carry out the above-mentioned steps (1), (2) and (3) one or more times; ( 5) Then all the lithium carbonate slurry obtained is subjected to centrifugal washing and separation. The method of the present invention significantly reduces the Na in the material after converting lithium precipitation through deep washing. + 、K + Wait for the content of soluble impurities, thereby making the lithium carbonate product with higher purity.

Description

technical field [0001] The present invention relates to the production of lithium carbonate, be specifically related to a kind of method of washing lithium carbonate. Background technique [0002] Lithium (Li) is a silver-white metal element with the smallest density. It has physical and chemical properties such as high specific heat, high electrical conductivity and strong chemical activity. It has a wide range of uses and can be used in batteries, aerospace, nuclear fusion power plants, metallurgy , ceramics, glass, grease, medicine and many other fields. Lithium carbonate is an inorganic compound, which is a colorless monoclinic crystal or white powder. It is a commonly used raw material for lithium-ion batteries. It can be used to prepare various lithium compounds, metal lithium and its isotopes, or directly used in ceramics. , drugs, catalysts, etc. With the growing global energy crisis, the development of new energy sources such as lithium batteries has become the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D36/00
CPCC01D15/08
Inventor 李健王洪陈文学高松陈传勋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