Utilize lepidolite to prepare the mica processing technology of lithium carbonate

A treatment process, lithium carbonate technology, applied in the direction of improving process efficiency, etc., can solve the problems of high production cost, lack of industry competitive advantage, and many by-products, and achieve the effect of reducing maintenance frequency, improving effective working time, and less operation steps

Active Publication Date: 2018-08-10
宜春银锂新能源有限责任公司
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AI Technical Summary

Problems solved by technology

[0005] Compared with spodumene and salt lake brine extraction technology, the company's existing lithium carbonate production technology has higher production costs, more by-products, and lack of industry competitive advantages

Method used

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Embodiment Construction

[0039] The production process of the present invention is briefly described as follows: Lepidolite and concentrated sulfuric acid are calcined at high temperature and fluorine is removed → slurry → slurry drying → slurry roasting → material is leached with water → cooling crystallization → centrifugal separation → neutralization and removal of impurities → evaporation and concentration → sink lithium.

[0040] Concrete method is: utilize lepidolite to prepare the mica processing technology of lithium carbonate, it is characterized in that:

[0041] (1) Lepidolite and dilute sulfuric acid are put into the reaction kettle at high temperature and normal pressure according to a certain proportion; 3-4; the high temperature is 1600-1900°C; the reaction period is 45-75 minutes;

[0042] (2) The reacted slurry is added to the dried silica sand by-products in the workshop for mixing; the mixing ratio of slurry and silica sand by-products is 5-10:1;

[0043] (3) The mixed powder ente...

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Abstract

The invention discloses a mica treatment process for preparing lithium carbonate by utilizing lepidolite. The process comprises the following steps: putting lepidolite and diluted sulfuric acid into a reaction kettle in a certain ratio at high temperature and normal pressure to react; adding the reacted slurry into a silica sand byproduct which is dried in workshop, and mixing the materials; drying and roasting the mixed powder in a kiln; directly adding water into the roasted material to perform a leaching reaction at a certain temperature; performing cooling crystallization, centrifugal separation, neutralized impurity removal, evaporation concentration and lithium depositing production processes on the leached slurry to prepare battery grade lithium carbonate and industrial lithium carbonate. The process has the advantages that gypsum byproduct in the process can be reduced by more than or equal to 35 percent in comparison with that in the prior art, the overall recovery of lithium carbonate is greatly increased, the quality of lithium carbonate is slightly improved in comparison with that of existing products, and each index can reach the national standard; and the problem of material attachment of a kiln can be solved after the acid leached slurry is added into and mixed with the workshop dried silica slag.

Description

technical field [0001] The invention relates to a treatment method of mineral raw materials, in particular to a mica treatment process for preparing lithium carbonate by using lepidolite. Background technique [0002] Lepidolite is an important mineral resource, which is rich in rare metal materials, such as lithium, sodium, potassium, rubidium, cesium, aluminum, etc. As the world's energy becomes increasingly tense, the development and utilization of new energy is a common topic in the world. Lithium battery new energy, as one of the important industries for the development of new energy, has been paid more and more attention by various countries; therefore, the comprehensive development and application of lepidolite raw materials has become a Hot topics of the day. [0003] China's Yichun tantalum-niobium tailings is currently the largest tantalum-niobium-lithium albite granite deposit in Asia, and it is also one of the polymetallic mineral mining and dressing resource ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/06C22B3/04C22B3/44C22B3/22C22B26/12
CPCC22B1/06C22B3/04C22B3/22C22B3/44C22B26/12Y02P10/20
Inventor 邹辉飞朱强辉钟亮黄艳军
Owner 宜春银锂新能源有限责任公司
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