System and method for extracting industrial lithium carbonate by supergravity

Abstract

The invention discloses a system and a method for extracting industrial lithium carbonate by supergravity. The system comprises a carbonizer, a solid and liquid separating device, a microwave-coupledsupergravity device, and a centrifuge device which are sequentially connected by pipelines. The system has the advantages that by combining the supergravity technique, the centrifuge device and a recycling device, the shape and particle size of the pyrolyzed lithium carbonate are averagely distributed, the distribution of small-particle and large-particle solid products is reduced, the size of centrifuge force of the centrifuge device can be adjusted according to the obtained particle size, and most of solid products with uniform particle size are thoroughly settled by the centrifuge force; asupernatant is recycled by the recycling device, so that a small amount of small particles suspended in the supernatant can be dissolved and pyrolyzed again, and be recycled; the battery-level or high-purity lithium carbonate solid product with yield rate reaching the industrial preparation standard can be obtained; the system is suitable for industrialized 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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