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A method for industrially producing anhydrous lithium hydroxide balls

A technology of anhydrous lithium hydroxide and monohydrate lithium hydroxide, applied in chemical instruments and methods, lithium oxide;/hydroxide, inorganic chemistry, etc., can solve the problem of low mechanical strength of ordinary LiOH particles, high dust rate, Easy to damage and other problems, to achieve the effect of narrow particle size distribution, high solubility and easy bonding

Active Publication Date: 2021-03-16
GANFENG LITHIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a carbon dioxide absorber, LiOH on the market still has the following problems: 1. High dust rate, choking; 2. CO 2 The absorption rate is generally 60-75% by mass, which has not yet been maximized; 3. Ordinary LiOH particles have low mechanical strength and are easily damaged

Method used

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  • A method for industrially producing anhydrous lithium hydroxide balls
  • A method for industrially producing anhydrous lithium hydroxide balls
  • A method for industrially producing anhydrous lithium hydroxide balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 100Kg of industrial-grade lithium hydroxide monohydrate was vacuum-dried at 160°C for 2 hours to obtain anhydrous LiOH with a main LiOH content of 97.3%. The anhydrous LiOH is pulverized to a fine powder anhydrous LiOH whose middle particle diameter D50 is 10 microns by a nitrogen jet mill. The micro-powder anhydrous LiOH is transported to the disk pelletizer under the protection of nitrogen by air flow, and the powder is formed into balls. The water addition amount of the spray water adding device is controlled to be 8%, and the balls are transported to the square vibrating screen to obtain anhydrous powder with a particle size of 2-3mm. Lithium hydroxide spheres, the small particle spheres that do not meet the particle size requirements are transported to the disc pelletizer to continue pelletizing into balls. Dry the qualified spherical lithium hydroxide wet material in a vacuum dryer at a drying temperature of 160 degrees for a drying time of 3 hours to obtain spher...

Embodiment 2

[0039] 80Kg of industrial-grade lithium hydroxide monohydrate was vacuum-dried at 170°C for 1 hour to obtain anhydrous LiOH with a main LiOH content of 97.5%. The anhydrous LiOH is pulverized to a fine powder anhydrous LiOH whose middle particle diameter D50 is 20 microns by a nitrogen jet mill. The micro-powder anhydrous LiOH is transported to the disc pelletizer under the protection of nitrogen by air flow, and the powder is formed into balls. The water addition amount of the spray water adding device is controlled to be 10%, and the balls are transported to the square vibrating screen to obtain anhydrous powder with a particle size of 1-2mm. Lithium hydroxide spheres, the small particle spheres that do not meet the particle size requirements are transported to the disc pelletizer to continue pelletizing into balls. The qualified spherical lithium hydroxide wet material was dried in a vacuum dryer at a drying temperature of 170 degrees for a drying time of 4 hours to obtain ...

Embodiment 3

[0041] 90Kg of industrial-grade lithium hydroxide monohydrate was vacuum-dried at 180°C for 4 hours to obtain anhydrous LiOH with a main LiOH content of 97.1%. The anhydrous LiOH is pulverized to a fine powder anhydrous LiOH whose middle particle diameter D50 is 30 microns by a nitrogen jet mill. The micro-powder anhydrous LiOH is transported to the disc pelletizer under the protection of nitrogen by air flow, and the powder is formed into balls. The water addition amount of the spray water adding device is controlled to be 13%, and the balls are transported to the square vibrating screen to obtain anhydrous powder with a particle size of 3-4mm. Lithium hydroxide spheres, the small particle spheres that do not meet the particle size requirements are transported to the disc pelletizer to continue pelletizing into balls. Dry the qualified spherical lithium hydroxide wet material in a vacuum dryer at a drying temperature of 180°C and a drying time of 1 hour to obtain spherical an...

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Abstract

The invention provides a method for industrially producing anhydrous lithium hydroxide balls, comprising the steps of dehydration drying, fine powder, ball forming of powder, sieving, drying, and thelike. Medicine grains, which do not cause powder falling and do not have irritating smell, are prepared from anhydrous lithium hydroxide by a powder forming process. When the anhydrous lithium hydroxide balls are applied to a CO2 absorbent, the absorption efficiency of carbon dioxide by the absorbent is tested to be 85% or more according to a coal standard MT454-2008.

Description

technical field [0001] The invention belongs to the field of chemical production of lithium hydroxide balls, in particular to a method for industrially producing anhydrous lithium hydroxide balls. Background technique [0002] The space occupied by the staff discontinuously and restricted in and out is a closed space. Due to special circumstances and special requirements, personnel need to enter the closed space to work. The situation of living and working in closed spaces widely exists in all aspects of daily life and social development, such as underground fortifications for defense during wartime isolation to prevent nuclear strikes, and closed cabins for manned spaceflight, submarines, etc. In addition, under certain conditions, the underground storage room of public buildings formed due to short-term ventilation failure or untimely, and the interior space of small passenger cars in case of emergency fire can be considered as closed spaces. Respiration, metabolism, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D15/02C01B32/55C01D15/08C04B30/00
CPCC01D15/02C01D15/08C04B30/00C01B32/55C04B22/062
Inventor 李良彬王彬陈超傅利华郁兴国艾刚华王计江黄小强高建勤李忠周峰李芳芳
Owner GANFENG LITHIUM CO LTD
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