A kind of production device and technology of nickel-cobalt-manganese ternary hydroxide

Abstract

The invention discloses a production device and technology of nickel-cobalt-manganese hydroxide. The production device mainly comprises closed vessel type reaction kettles, a discharging pump, a centrifugal machine and a connecting pipeline, an overflow hole is formed in the side wall of the upper part of each reaction kettle, a feeding hole is formed in the side wall of the lower part of each reaction kettle, and the overflow hole of each reaction kettle is connected with the feeding holes of other reaction kettles by virtue of pipelines. In the technology, overflow of the previous reaction kettle is taken as base solution of the next reaction kettle, ageing is carried out in the next reaction kettle, before continuous precipitation, an ageing process promotes wear off of large crystals in the base solution and growth of small crystal particles in the base solution, crystal particles begin to grow after overall tending to be uniform. Each reaction kettle of the production device of nickel-cobalt-manganese hydroxide has two functions, namely precipitation synthesis and ageing, each reaction kettle can overflow to other two reaction kettles, the overflow is aged and then is subjected to parallel flow precipitation and synthesis, and the production device of nickel-cobalt-manganese hydroxide has the advantages that end point granularity can be easily controlled and product size distribution is narrow.

Description

technical field [0001] The utility model belongs to the field of material wet synthesis, and in particular relates to a production device of nickel-cobalt-manganese ternary hydroxide and a process thereof. Background technique [0002] The preparation of nickel-cobalt-manganese ternary hydroxide is generally a single-reactor batch precipitation process. The nucleation, growth, and aging of the ternary hydroxide are all completed in the same reactor, and there is energy consumption during the implementation process. High, low production efficiency, unstable quality between batches and other issues. [0003] ZL201520250444.0 discloses a continuous reaction process of low-magnetic nickel-cobalt-manganese ternary hydroxide. The crystal nucleation, primary growth reaction, optimized growth reaction, and aging are carried out in four reactors respectively, realizing continuous production. , but the aging of this process is only carried out in the last reactor, and there is no agi...

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Problems solved by technology

[0002] The preparation of nickel-cobalt-manganese ternary hydroxide is generally a single-reactor batch precipitation process. The nucleation, growth, and aging of the ternary hydroxide are all completed in the same reactor, and there is energy consumption during the implementation process. High, low production efficiency, unstable quality between batches, etc.

[0003] ZL201520250444.0 discloses a continuous reaction process of low-magnetic nickel-cobalt-manganese ternary hydroxide. The crystal nucleation, primary growth reaction, optimized growth reaction, and aging are carried out in four reactors respectively, realizing continuous production. , but the aging of this process is only carried out in the last reactor, and there is no aging process in the reactor in the middle process, because the particle size distribution of the precipitated nuclei overflowing from the first reactor is relatively wide, and the second and The crystal nuclei in the subsequent reactor grow on the original basis, resulting in a wider particle size distribution of the final product

[0004] ZL201520948647.7 discloses a continuous production process of nickel-cobalt-manganese ternary hydroxide: the nucleation of nickel-cobalt-manganese ternary hydroxide is intermittent production, after nucleation, the crystal nuclei are concentrated in a reactor, and then continuously Add it into the growth kettle, the growth kettle will grow the crystal nuclei, and overflow to the aging kettle after the particle growth is completed. This process realizes the semi-continuous production of nickel-cobalt-manganese ternary hydroxide, but the continuous Crystal nuclei, mixed with grown nuclei and overflowing to the aging tank, also lead to a wider particle size distribution of the final product

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