Method for one-step preparation of battery-grade lithium carbonate from lepidolite

A lepidolite, battery-grade technology, applied in the direction of lithium carbonate;/acid carbonate, etc., to achieve the effect of low production cost, stable process and improved recovery rate

Inactive Publication Date: 2020-03-17
江西南氏锂电新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And it does not involve the roasting process method and the composition of related auxiliary materials

Method used

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  • Method for one-step preparation of battery-grade lithium carbonate from lepidolite
  • Method for one-step preparation of battery-grade lithium carbonate from lepidolite

Examples

Experimental program
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Embodiment 1

[0042] Get its main chemical composition of the lepidolite raw material that Yichun tantalum niobium lithium ore produces as following table (wt%) surplus is fluorine,

[0043] Li 2 o

K 2 o

Na 2 o

AL 2 o 3

SiO 2

Fe 2 o 3

Rb 2 o

Cs 2 o

4.32 7.51 0.46 23.8 54.32％ 0.38 1.66 0.28

[0044] 1) To make lepidolite concentrate powder by crushing, crush the above-mentioned lepidolite raw materials through a crushing device, then pass through a high-gradient magnetic separator to remove weak magnetic iron minerals, and pass through a sieve of more than 100 mesh to obtain lepidolite concentrate pink;

[0045] 2), mix the ingredients, fully mix the lepidolite concentrate powder and compound salt potassium sulfate and sodium sulfate, control the addition of potassium sulfate and sodium sulfate to be 45% of the lepidolite concentrate powder quality, the ratio of potassium sulfate and sodium sulfate is different Accou...

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Abstract

The invention provides a method for one-step preparation of battery-grade lithium carbonate from lepidolite. Specifically, lepidolite is adopted as the raw material to mix with auxiliary materials, the mixed raw material and auxiliary materials are subjected to roasting in a rotary kiln device so as to extract lithium, and the process include: crushing of concentrate powder for making lepidolite,mixing, roasting, leaching and extraction of lithium, impurity removal, lithium precipitation for preparation of battery-grade lithium carbonate, etc. The method directly prepares the battery-grade lithium carbonate product by precipitation without the process of producing industrial-grade lithium carbonate. And the method uses the process of extracting lithium by chlorine salt roasting, has smaller influence on the environment, improves the lithium recovery rate, is stable in process and easy to operate, and facilitates industrial production.

Description

Technical field: [0001] The invention relates to a method for extracting high-purity lithium carbonate from lepidolite raw materials, in particular to a method for preparing battery-grade lithium carbonate in one step using lepidolite as a raw material. Background technique: [0002] Lithium carbonate is an important chemical raw material and an important raw material for the manufacture of new energy lithium batteries. With the promulgation of the national new energy development plan, lithium battery new energy has become one of the energy industries supported by the state; and sulfur battery lithium carbonate is an important basic raw material for the development of lithium battery new energy, and its demand is increasing and its price is getting higher and higher. come higher. [0003] At the current stage of technology, the preparation of lithium salt from lithium ore generally uses lithium ore to make lepidolite raw material powder, and the majority of lithium is extra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08
CPCC01D15/08C01P2004/61C01P2006/80
Inventor 南进喜南天曾小毛刘剑叶吴进方曾位勇钟斌王家前张国强苏杰民叶盛旗廖长青邱联春
Owner 江西南氏锂电新材料有限公司
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