A system and method for purifying industrial-grade lithium carbonate using high gravity

Abstract

The invention discloses a system and method for purifying industrial-grade lithium carbonate by applying supergravity. The system includes a carbonizer, a solid-liquid separation device, a microwave-coupled supergravity device, and a centrifugal device sequentially connected through pipelines. The present invention combines supergravity technology, centrifugation and recovery devices to make the appearance and particle size distribution of the pyrolyzed lithium carbonate average, reduce the distribution of small particles and large particle solid products, and then adjust the centrifugal device according to the obtained particle size The size of the centrifugal force, and through centrifugation, most of the solid products with uniform particle size are completely precipitated, and on this basis, the clear liquid is refluxed through the recovery device, so that a small part of the small particles suspended in the clear liquid can pass through the heat of dissolution again. It can be decomposed and recycled, so that the battery-grade or high-purity lithium carbonate solid product with a yield reaching the industrial scale preparation standard can be obtained, which is suitable for industrial large-scale preparation.

Description

technical field [0001] The invention relates to the purification of industrial grade lithium carbonate. More specifically, it relates to a system and method for purifying industrial-grade lithium carbonate using high gravity. Background technique [0002] Industrial-grade lithium carbonate is a key product for the production of lithium metal and secondary lithium salts, and plays an important role in important industrial fields such as glass ceramics, petrochemicals, medicine, and batteries. In recent years, with the low-carbon economy and new energy industry warming up, the lithium battery industry has developed rapidly, making the demand for lithium carbonate, especially battery-grade lithium carbonate, continuously increasing, while the existing lithium ore and salt lake brine technology products Most of them are low-grade industrial-grade lithium carbonate, so it is very important to use industrial-grade lithium carbonate to purify and prepare high-grade products. [0...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art that the purification of battery-grade or high-purity lithium carbonate requires ion exchange to remove impurities, resulting in high cost, complicated process, and slow exchange rate, which is not conducive to large-scale industrial preparation, the embodiment of the present invention provides an application High gravity purification industrial grade lithium carbonate system, including:

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