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Process for preparing lithium chlorate by lithium extracted from lepidolite

A lepidolite and part of the technology is applied in the field of extracting lithium to produce lithium carbonate, which can solve the problems of difficult industrial implementation, high equipment requirements, and large consumption of potassium sulfate, so as to solve the problem of equipment anticorrosion, reduce the evaporation and concentration process, and save H2SO4. Effect

Inactive Publication Date: 2006-09-06
钟辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: (1) the amount of material is large
Although this method is better than the lime roasting method, there are still the following problems: (1) potassium sulfate consumption is large, resulting in higher production costs
Because this method needs to react under high temperature and high pressure, it has high requirements on equipment, it is difficult to implement in industry, and the corrosion is extremely serious, so it is difficult to apply in industry

Method used

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  • Process for preparing lithium chlorate by lithium extracted from lepidolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With lepidolite ore (composition is shown in Table 1) 1000 grams and industrial grade Na 2 SO 4 , Industrial Grade CaF 2 According to the mass ratio of 1:0.2:0.3, the ingredients are ball milled and dry mixed in a ball mill, and roasted in a tubular resistance furnace. The firing temperature is 900°C. Roasting time is 60 minutes, take out and cool, grind to 60-80 mesh with ball mill,

[0019] Li 2 o

Embodiment 2

[0021] With the lepidolite ore 1000g of table 1 composition, and industrial grade CaSO 4 2H 2 O, industrial grade CaO is batched according to mass ratio 1: 0.4: 0.2, carries out ball milling, dry mixing in ball mill, follow-up process is the same as embodiment 1, and the results are shown in Table 2.

Embodiment 3

[0023] With the lepidolite ore 1000g of table 1 composition, and industrial grade CaSO 4 2H 2 O, industrial grade Na 2 SO 4 According to the mass ratio of 1: 0.4: 0.4 ingredients, ball milling and dry mixing were carried out in a ball mill, and the follow-up process was the same as in Example 1. The results are shown in Table 2.

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Abstract

The invention relates to a method for preparation of lithium carbonate extracting lithium from lithionite. The invention consists of milling, leaching and filtering after modifying by broasting lithonite ore together with the additive findings such as calcium fluoride, calcium sulfate and sodium sulfate at a certain temperature, adding sodium carbonate into the leachate to deposite lithium ion forming the deposition of lithium carbonate, and washing and drying the solid gained by filtering to get the product of lithium carbonate. The filtered mother liquid returns to the circulation to deposit lithium ion. After secondary circulation, we get the mixed salts of potassium sulfate and sodium sulfate as the educts by washing and drying the aforementioned filtered mother liquid. Some of the mixed salts return as findings roasted with lithonite ore for circulation use, while others can be used as raw material for preparation of potassium sulfate.

Description

Technical field [0001] The invention relates to a new method for extracting lithium from lepidolite to prepare lithium carbonate. Background technique [0002] Lithium and its compounds are widely used in energy, chemical industry, metallurgy, ceramics, nuclear energy and other fields as energy materials required by new technologies. The global demand for lithium and its compounds is increasing day by day. According to statistics, the current world demand for lithium products is growing at an average annual rate of 5-8%. Therefore, the development of lithium resources and its industrial production is one of the important industries that are prioritized by countries all over the world. my country is rich in lepidolite resources, among which Li 2 The O content is generally around 4.5%, and it also contains Rb 2 O, Cs 2 O, K 2 O and other useful minerals, how to develop this resource is of great significance to my country's lithium industry. [0003] Lithium extraction fr...

Claims

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Application Information

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IPC IPC(8): C01D15/08
Inventor 钟辉许惠
Owner 钟辉
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