Reaction kettle

Abstract

The invention discloses a reaction kettle. According to the reaction kettle, a stirrer is arranged in a reaction cavity; a feed inlet is formed in the bottom of the reaction kettle; an overflow opening is formed in the upper part of the reaction kettle; a horizontal type flow baffle assembly is arranged close to a stirring paddle of the stirrer; and a spiral guide plate is wound in the reaction cavity above the stirring paddle and is led to the overflow opening. The reaction kettle has a simple structure, is easy to manufacture and low in cost, and is particularly suitable for preparing solid granules by a wet method; and a product is uniform and high in specific gravity.

Description

technical field [0001] The invention relates to a chemical reaction device, in particular to a reaction kettle which is especially suitable for wet preparation of solid granular materials. Background technique [0002] One of the synthesis methods of modern solid powder materials is wet synthesis, usually the raw materials are formulated into a solution, and the product is precipitated from the reaction solution by precipitation reaction. Wet synthesis generally uses a reactor as a production container, and the reactor used is usually composed of a kettle body, a kettle cover, agitator, a heating pipe or jacket, a material inlet, a material outlet, and a measurement port; when the reaction material is required When fully mixing, the inner wall of the reaction kettle used can also be fixed with a certain number of baffles vertically. [0003] Wet synthesis sometimes adopts a continuous overflow method, that is, feeding from the bottom of the reactor while discharging from th...

AI Technical Summary

Problems solved by technology

When the specific gravity of the product is equal to the specific gravity of the reaction liquid, the product and the reaction liquid are basically mixed evenly, and the overflowing product is easy to control stably, but when the specific gravity of the product is larger than that of the reaction liquid, there is a disadvantage that the product cannot be discharged from the reactor in time

[0004] In the field of wet synthesis of solid powder materials, there are often special requirements for the particle size and shape of the product solid powder materials, so the qualified precipitated product must be discharged from the reactor in time, otherwise, the precipitate will continue to grow, which will affect the product quality

For example, spherical tricobalt tetroxide, spherical manganese tetraoxide, spherical cobalt hydroxide and spherical manganese-nickel-cobalt ternary composite hydroxides and oxides required by the lithium-ion battery industry, and spherical nickel hydroxide required by the nickel-metal hydride battery industry Such powder materials are all synthesized by wet method. In the application process of these solid powder materials, it is often required that the particles of these solid powder materials should not be too large, but the specific gravity of these materials is generally greater than the density of the reaction solution. When some overflow reactors are used for wet production and synthesis, the reaction products are easy to deposit in the lower part of the reactor, and will continue to grow if they are not discharged in time, which will affect the quality and use effect of the product

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