Process for preparing high-density cobaltous carbonate

Abstract

Disclosed is a production method of high-density cobalt carbonate, comprising steps as follows: firstly, a cobalt chloride solution and an ammonium carbonate solution are flowed according to a certain flux into a reactor to react for 9 hours at a temperature of 45 to 50 DEG C and at a pH value of 7.65 to 7.75 to form slurry which flows into a cobalt-depositing tank for particle growing, and ages for 2 hours, and is treated by filtering, slurrying and washing, and then enters a flash dryer for spin drying, and finally passes a cyclone separating device and a bag-type collector to achieve secondary recovery to obtain the finished product. The production method is characterized in that firstly the processes of continuous ultramicro deposition and particle growing under the conditions of constant current, constant pH value and constant temperature are adopted in the course of deposition, and then filtering and washing are adopted; and the concentration stability of reactants during the deposition reaction and the continuity of the process can be better achieved after the process of spin drying by the flash dryer, so that the products in terms of particle nucleation conditions and production time can be deterministic during production, and the particle size and morphology of the deposit can be controlled, thereby achieving consistency of high-density quality and stability of the products.

Description

technical field [0001] A new material production method, especially a cobalt carbonate production method used in manufacturing industries such as battery materials, catalysts, magnetic materials, electronic materials, and hard alloys. Background technique [0002] In the modern information society, the rapid development of mobile electronic devices benefits from the excellent electrochemical performance of green lithium-ion secondary batteries. Lithium cobaltate is currently the most mature production of cathode materials for lithium-ion secondary batteries. The key raw materials that determine the quality of lithium cobaltate are mainly affected by the density and crystal structure of cobalt carbonate. Therefore, the production of cobalt carbonate with high density and good crystal structure is the most urgent needs of the industry. [0003] The traditional method of producing cobalt carbonate is an intermittent discontinuous production process. In the precipitation stage,...

AI Technical Summary

Problems solved by technology

[0003] The traditional method of producing cobalt carbonate is an intermittent discontinuous production process. In the precipitation stage, a precipitant is added to a larger volume of cobalt-containing solution, and the precipitation is one tank after another. During the reaction process, the chances of reunion between particles gradually increase. , it is easy to cause excessive concentration of local precipitant and violent reaction, resulting in peritectic and alkali-coated segregation

The traditional process is also divided into multiple centrifugal filtration, and the sediment is dried intermittently, and the flow, temperature difference, and pH value control are not constant and inaccurate, resulting in uneven distribution of product particles and poor consistency, which is not conducive to the stability of product quality

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