A purification system for lithium carbonate

Abstract

The invention discloses a purification system for lithium carbonate, comprising a mixing reaction tank, a waste collection chamber is installed at the bottom of the mixing reaction tank, a waste material outlet valve is installed on the bottom surface of the mixing reaction tank, the mixing The upper end surface of the reaction tank is equipped with a feeding pipe, the inside of the waste collection chamber is equipped with a submersible pump, the other end of the mixed reaction tank is connected with a vacuum distillation tank through a pipeline, and the gap between the mixed reaction tank and the vacuum distillation tank is A filter is installed on the pipeline, and one end of the vacuum distillation tank is connected with a filter tank through a pipeline, and the waste collection chamber, the filter tank and the vacuum distillation tank are all installed on the upper surface of the mounting seat; The feeding method allows the reaction materials to be dispersed everywhere after they are put into the mixing reaction tank, thereby increasing the reaction area, improving the reaction efficiency, and reducing the rotational force required for stirring and mixing, which is more energy-saving.

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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