Purification system for lithium carbonate

Abstract

The invention discloses a purification system for lithium carbonate. The system comprises a mixing reaction tank, a waste collecting chamber is mounted at the bottom of the mixed reaction tank, a waste outlet valve is mounted on the surface of the bottom end of the mixed reaction tank, a feeding pipe is mounted on the upper end surface of the mixed reaction tank, a submersible pump is mounted in the waste collecting chamber, the other end of the mixed reaction tank is connected with a reduced pressure distillation tank through a pipeline, a filter is mounted on the pipeline between the mixed reaction tank and the reduced pressure distillation tank, one end of the reduced pressure distillation tank is connected with a filtering tank through a pipeline, and the waste collecting chamber, andthe filtering tank and the reduced pressure distillation tank are all mounted on the upper surface of a mounting base. By means of the centrifugal discharging mode, reaction materials can be dispersedeverywhere after being fed into the mixing reaction tank, so that the reaction area is increased, the reaction efficiency is improved, meanwhile, the rotating force required by stirring and mixing isreduced, and more energy is saved.

Description

technical field [0001] The invention belongs to the technical field of lithium carbonate, in particular to a purification system for lithium carbonate. Background technique [0002] Lithium carbonate is a common raw material for lithium-ion batteries. It is an inorganic compound with a chemical formula of Li2CO3. It is a colorless monoclinic crystal or white powder with a density of 2.11g / cm3 and a melting point of 723°C. It is soluble in dilute acid and slightly soluble in Water, the solubility in cold water is higher than that in hot water, insoluble in alcohol and acetone, can be used to make ceramics, medicines, catalysts, etc., commonly used raw materials for lithium-ion batteries, the usual preparation method is: sintering spodumene and limestone at high temperature to produce aluminum It can also be prepared by leaching lithium hydroxide solution with lithium hydroxide and reacting with sodium carbonate. It can also be prepared by using brine to extract lithium-contai...

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Problems solved by technology

[0002] Lithium carbonate is a common raw material for lithium-ion batteries. It is an inorganic compound with a chemical formula of Li2CO3. It is a colorless monoclinic crystal or white powder with a density of 2.11g / cm3 and a melting point of 723°C. It is soluble in dilute acid and slightly soluble in Water, the solubility in cold water is higher than that in hot water, insoluble in alcohol and acetone, can be used to make ceramics, medicines, catalysts, etc., commonly used raw materials for lithium-ion batteries, the usual preparation method is: sintering spodumene and limestone at high temperature to produce aluminum It can also be prepared by leaching lithium hydroxide solution with lithium hydroxide and reacting with sodium carbonate. It can also be prepared by using brine to extract lithium-containing material liquid after barium chloride, removing calcium and magnesium ions with soda ash, acidifying with hydrochloric acid, and then reacting with soda ash. , and the prepared lithium carbonate often has many impurities, that is, the purity is not high;

[0003] Moreover, when feeding into the mixing reaction tank, the reaction material will fall along the feed pipe to the same position of the mixing reaction tank, causing accumulation, reducing the reaction area, and increasing the rotation force required for stirring and mixing. Here we propose a purification system for lithium carbonate

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