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A mica treating process for preparing lithium carbonate by utilizing lepidolite

A processing technology, lithium carbonate technology, applied in the direction of lithium carbonate;/acid carbonate, etc., can solve the problems of complex production process of lithium battery, lack of industry competitive advantages, high production cost, and achieve novel design and comprehensive resources. The effect of high utilization rate and low production cost

Inactive Publication Date: 2018-04-10
大余县旭日矿业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with spodumene and salt lake brine extraction technology, the existing lithium carbonate production technology has higher production costs, more by-products, lack of industry competitive advantages and is not conducive to environmental protection. The production process of lithium batteries is relatively complicated, and there are deficiencies, which cannot meet the actual needs of the society.

Method used

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Embodiment Construction

[0014] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0015] A mica treatment process using lepidolite to prepare lithium carbonate, including lepidolite raw materials, using a combination of acid leaching and calcination, including acid leaching, calcination, filtering, freezing, separation, concentration, lithium precipitation, 50% of the acid leaching Sulfuric acid aqueous solution and mica powder crushed to 80-100 mesh with a reaction ratio (mass ratio) of 2:1, reflux reaction at a temperature of 118°C-122°C for 8h-10h, let stand, add distilled water twice the volume of the reaction solution Leaching, ICP-AES method measures each metal ion concentration (Li, K, Na, Mg, Al, Fe etc.) Ca(OH)2 neutralizes the excess acid, continue to adjust the pH value to 12-13, most of the heavy metal ions in the f...

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Abstract

A mica treating process for preparing lithium carbonate by utilizing lepidolite is disclosed. Lepidolite is adopted as a raw material. A manner combining acid leaching and calcination is adopted. Theprocess includes acid leaching, calcination, filtration, freezing, separation, concentration and lithium deposition. The process includes a pure high-temperature calcination method or an acid leachingmethod, and has characteristics of mild process conditions, stable operation processes, a short production period, a high device utilization rate and a high lithium carbonate yield. The lithium leaching rate of the process can be greater than 90% or above, the production cost is low, and the resource comprehensive utilization rate is high, and the process has few influences on environment, has excellent practical performance and a novel design and is a good innovative scheme.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a mica treatment process for preparing lithium carbonate from lepidolite. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream now. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Li-ion batteries do not contain metallic lithium and are rechargeable. [0003] Lepidolite is an important mineral resource, which is rich in rare metal materials, such as lithium, sodium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08
CPCC01D15/08
Inventor 谭运全谭子峻
Owner 大余县旭日矿业科技有限公司