Method for preparing battery lithium carbonate by continuously carbonizing industrial-grade lithium carbonate

A lithium carbonate, industrial-grade technology, applied in the direction of lithium carbonate;/acid carbonate, etc., can solve problems such as continuous production, improve production efficiency, improve conversion rate and the degree of automation of production equipment, improve safety sexual effect

Pending Publication Date: 2022-05-13
宁夏天霖新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the defect that the battery lithium carbonate preparation method in the prior art cannot be continuously produced, and to provide a method for preparing battery lithium carbonate by continuous carbonization of industrial grade lithium carbonate

Method used

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  • Method for preparing battery lithium carbonate by continuously carbonizing industrial-grade lithium carbonate
  • Method for preparing battery lithium carbonate by continuously carbonizing industrial-grade lithium carbonate

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Effect test

Embodiment 1

[0020] A method for preparing battery lithium carbonate by continuous carbonization of industrial grade lithium carbonate comprises the following steps:

[0021] 1. Make a slurry of lithium carbonate and battery water according to a solid-to-liquid ratio of 1:24, start stirring and stir well; transport the lithium carbonate slurry to the carbonization kettle through a metering pump, and feed carbon dioxide into the three carbonization kettles at the same time The carbonization reaction of the gas is carried out, and the flow rate is adjusted to 35L / min. During the reaction, the pressure in the reactor is controlled by adjusting the exhaust valve within the range of 40Kpa to 60Kpa, and the residence time of the carbonization reaction is controlled for 1h until the material in the reactor is clarified; Carbon dioxide is continuously introduced, and the feed flow rate is controlled at 2.5L / min. Lithium carbonate slurry is continuously added to the first-stage carbonization kettle,...

Embodiment 2

[0025] A method for preparing battery lithium carbonate by continuous carbonization of industrial grade lithium carbonate comprises the following steps:

[0026] 1. Make a slurry of lithium carbonate and battery water according to the solid-to-liquid ratio of 1:24, start stirring and fully stir; transport the lithium carbonate slurry to the carbonization kettle through a metering pump, and feed carbon dioxide gas into the three carbonization kettles at the same time Carry out the carbonization reaction, adjust the flow rate to 30L / min, control the pressure in the reactor by adjusting the exhaust valve to keep it in the range of 40Kpa~60Kpa during the reaction, control the residence time of the carbonization reaction for 1h, until the material in the kettle is clarified; keep the carbon dioxide in the carbonization kettle Continuous feeding, controlling the feed flow rate to 2.5L / min and continuously adding lithium carbonate slurry to the first-stage carbonization kettle, the re...

Embodiment 3

[0030] A method for preparing battery lithium carbonate by continuous carbonization of industrial grade lithium carbonate comprises the following steps:

[0031] 1. Make a slurry of lithium carbonate and battery water according to the solid-to-liquid ratio of 1:27, start stirring and fully stir evenly; transport the lithium carbonate slurry to the carbonization kettle through a metering pump, and feed carbon dioxide into the three carbonization kettles at the same time The carbonization reaction of the gas is carried out, and the flow rate is adjusted to 35L / min. During the reaction, the pressure in the reactor is controlled by adjusting the exhaust valve to keep it within the range of 40Kpa~60Kpa, and the carbonization reaction time is controlled for 1h until the material in the kettle is clarified; keep the carbon dioxide in the carbonization kettle Continuous feeding, controlling the feed flow rate to 2.7L / min and continuously adding lithium carbonate slurry to the first-sta...

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Abstract

The invention discloses a method for preparing battery lithium carbonate through continuous carbonization of lithium carbonate, which comprises the following steps: preparing industrial grade lithium carbonate and battery water into slurry according to a solid-liquid ratio of 1: 23-1: 27, putting the slurry into a first-stage carbonization kettle according to a certain flow rate, and enabling the slurry to sequentially enter a second-stage carbonization kettle and a third-stage carbonization kettle through an overflow port to be subjected to carbonization reaction with introduced carbon dioxide gas, a lithium bicarbonate solution is obtained; the carbonized lithium bicarbonate solution is subjected to precise filtration, insoluble substances are removed, it is ensured that SS is smaller than or equal to 5 mg/L, ion adsorption is conducted through an ion exchange device, and a purified lithium bicarbonate solution is obtained; and conveying the lithium bicarbonate solution into a pyrolysis kettle for pyrolysis to obtain a lithium carbonate precipitate, and filtering, washing and drying the obtained lithium carbonate precipitate to obtain battery lithium carbonate. According to the method provided by the invention, the carbonization efficiency of lithium carbonate is improved, the emission of carbon dioxide is effectively reduced, energy is saved, and the method has relatively high practical value.

Description

technical field [0001] The invention relates to a method for preparing battery lithium carbonate, in particular to a method for preparing battery lithium carbonate by continuous carbonization of industrial grade carbonic acid. Background technique [0002] Lithium carbonate is the basic lithium salt of lithium. Especially with the rapid development of building materials, electronics, automobiles, information and other industries, lithium carbonate has become the most important product in lithium compounds. Various lithium compounds can be produced based on it. In recent years, as the positive electrode material of lithium-ion batteries, the battery-grade lithium carbonate used for the synthesis of lithium battery electrolytes has attracted more and more attention. Due to the defects of lithium carbonate production raw materials and process technology, industrial grade lithium carbonate contains more impurities and cannot be directly used as a raw material for the synthesis o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08
CPCC01D15/08C01P2006/80
Inventor 刘丽兵谭建平黄辉
Owner 宁夏天霖新材料科技有限公司
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