Cobalt carbonate production system and method

Abstract

The invention discloses a cobalt carbonate production system and method. The system comprises at least four reaction kettles, the four reaction kettles comprise the first reaction kettle, the second reaction kettle, the third reaction kettle and the fourth reaction kettle, each reaction kettle is provided with a side face feeding port, the middle of each reaction kettle is provided with a discharging overflow port, and the bottom of each reaction kettle is provided with a bottom valve; the side feed ports of the second reaction kettle and the fourth reaction kettle are connected with the discharging overflow port of the first reaction kettle, the side feed port of the third reaction kettle is connected with the discharging overflow port of the second reaction kettle, and the discharging overflow port of the previous stage of reaction kettle is higher than the side feed port of the next stage of reaction kettle. According to the invention, continuity and stability of cobalt carbonate growth are ensured, and cobalt carbonate particles grow step by step in the process of reaction in different kettles, so that the finished cobalt carbonate particles with larger particle size and better consistency can be obtained, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of cobalt carbonate, and in particular relates to a cobalt carbonate production system and method. Background technique [0002] At present, lithium-ion batteries have been widely used in 3C fields, such as smart phones, cameras, drones, etc. The performance and cost of lithium-ion batteries largely depend on the performance and cost of lithium-ion battery cathode materials; The material is mainly lithium cobalt oxide, which has high specific capacity, stable structure, and no memory effect. Lithium carbonate, and cobalt tetroxide is mainly formed by low-temperature roasting of cobalt carbonate or cobalt oxyhydroxide, wherein cobalt carbonate can be sintered to produce lithium cobalt oxide with good shape, large particles, and high vibration; cobalt carbonate is the precursor of lithium cobalt oxide. The physical and chemical properties are inherited to a certain extent, and the physical and chemical proper...

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Problems solved by technology

The Chinese patent with the publication number CN108190971A discloses a method and system for preparing cobalt carbonate, which uses seed crystals to prepare cobalt carbonate, which improves the output and preparation efficiency of cobalt carbonate on the one hand, and uses small particle size cobalt carbonate crystals on the other hand. A kind of, controlled the particle size of large particle size cobalt carbonate in the reaction mother liquor, guaranteed the consistency and the stability of continuous process growth large particle size cobalt carbonate, but still there are many artificial intermittent operations, and production efficiency is not high; Publication No. The invention patent of CN108275729 discloses a system and method for preparing cobalt carbonate, adding thickener structure, which improves the efficiency of continuous operation, but cobalt carbonate cannot fully grow after nucleation, and the finally obtained cobalt carbonate particle size is relatively small. Small, unable to meet the requirements in terms of quality

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