Novel high-efficiency mixing anti-wall-attachment lithium deposition crystallization reaction kettle system and novel high-efficiency mixing anti-wall-attachment lithium deposition crystallization reaction kettle method

Abstract

The invention discloses a novel efficient mixing anti-wall-attachment lithium precipitation crystallization reaction kettle system and method. The reaction kettle system comprises a W bottom seal head, a barrel, a guide plate, an upper seal head, a feeding buffer tank, a feeding port, a distributing device, a liquid level block, a discharging port, a heat source cavity, a heat source inlet, a heat source outlet, a stirrer and stirring blades. The invention discloses a novel efficient mixing anti-wall-attachment crystallization process method. The method comprises the following steps: a) adding a sodium carbonate solution into a reaction kettle; b) adding the lithium solution into a feeding buffer tank, feeding the lithium solution into a distributor through the feeding buffer tank, and uniformly distributing and adding the lithium solution into the reaction kettle through the distributor; and c) intensely stirring through a stirrer, so that the lithium solution is uniformly stirred at the moment of adding, and impurity wrapping in the crystallization process is reduced. According to the method, the high-quality lithium carbonate product can be precipitated from the high-salt-concentration lithium solution through a one-step method, and the wall bonding phenomenon in the lithium precipitation process can be prevented.

Description

technical field [0001] The present invention relates to the technical field of lithium carbonate crystallization process, in particular to a novel high-efficiency mixed anti-caking wall crystallization reaction kettle system and method for precipitation of lithium. Background technique [0002] Lithium carbonate, lithium chloride and lithium hydroxide and other basic lithium salt products are widely used in dyes, chemical raw materials, glass manufacturing, ceramics, food, semiconductors, national defense and military, atomic energy, catalysts and other fields, battery-grade lithium carbonate can be used to prepare cobalt acid Lithium, lithium manganate, ternary materials and lithium iron phosphate and other lithium ion battery cathode materials. High-grade pure lithium carbonate is not only used in high-end lithium-ion battery cathode materials and battery-grade lithium fluoride, but also widely used in optoelectronic information, and can be used to prepare optical special ...

AI Technical Summary

Problems solved by technology

[0004] The current lithium carbonate lithium precipitation process mainly has the following defects: 1) the qualified rate of battery grade lithium carbonate is very low, mainly because in the process of lithium carbonate lithium precipitation lithium crystallization, there is a large amount of residue and parcel of impurities in the lithium carbonate crystal, This wrapped impurity cannot be washed out in the subsequent washing process, and can only reach industrial-grade standards. To improve the purity of lithium carbonate, it can only be purified by acid dissolution or carbonization, which lengthens the process flow. It also greatly increases energy consumption and cost; 2) At present, the wall formation problem of the lithium sinking process is very serious. The traditional crystallization process needs to stop production frequently to clean the wall formation inside the lithium sinking reactor, which greatly affects the stability of the process and production capacity. The wall of the junction is a defective product, which needs additional treatment, which increases the production cost

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