A method for producing a battery material lithium carbonate and an apparatus for the production

By using aminophosphate surfactants to enhance the binding force between the collector and lepidolite during the lepidolite flotation process, the problem of insufficient selectivity of monoamine collectors was solved, the quality of lepidolite concentrate and flotation efficiency were improved, and higher quality lithium carbonate production was achieved.

CN121292478BActive Publication Date: 2026-04-07YIFENG JIULING LITHIUM IND CO LTD
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Patent Information

Application Number
CN202511393497.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-28
Publication Date
2026-04-07
Estimated Expiration
2045-09-28

AI Technical Summary

Technical Problem

In existing technologies, the use of monoamine-based lepidolite collectors in the lepidolite flotation process still has room for improvement in selectivity, resulting in low concentrate grade and high foam viscosity, which affects flotation efficiency.

Method used

Aminophosphoric acid surfactants are used as collectors. By incorporating phosphate and carboxylic acid groups into the collector, the phosphate groups in the aminophosphoric acid molecules form stable chemical bonds or complexes with lithium ions on the surface of lepidolite, thereby enhancing the binding force between the collector and lepidolite. Furthermore, the collector interacts with the lepidolite surface through electrostatic attraction and hydrogen bonding, thus reducing its interaction with gangue minerals.

Benefits of technology

It improves the quality and selectivity of lepidolite concentrate, enhances the binding force between the collector and lepidolite, increases flotation efficiency and concentrate grade, reduces adsorption of gangue minerals, and improves the production quality of lithium carbonate.

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Abstract

This invention provides a method and equipment for producing lithium carbonate for batteries. The method includes the following steps: S1, crushing and grinding lepidolite ore into fine particles with a particle size of less than 75 μm; S2, placing the ground lepidolite particles into a flotation device to obtain lepidolite concentrate using a flotation process. The lithium carbonate production method provided by this invention incorporates phosphate and carboxylic acid groups into the collector. The phosphate groups in the aminophosphate molecule can form stable chemical bonds or complexes with lithium ions on the surface of lepidolite, enhancing the binding force between the collector and lepidolite, increasing the collection ability of lithium minerals, and improving selectivity. The interaction with the surface of lepidolite is specific, while the interaction with the surface of gangue minerals is weaker, thus better enhancing its selectivity and improving the quality of the lepidolite concentrate, laying the foundation for the subsequent production of higher quality lithium carbonate.
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