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Method for reducing activity of high-activity lithium hydride powder

A lithium hydride, high activity technology, applied in the direction of hydride purification/stabilization, alkali metal/alkaline earth metal/beryllium/magnesium hydride, etc., can solve the problem of reducing the activity of highly active lithium hydride powder and reducing the activity of highly active lithium hydride powder , reduce the safety risks of lithium hydride powder digestion and other issues, and achieve the effect of reducing safety risks

Active Publication Date: 2021-04-06
CNNC JIANZHONG NUCLEAR FUEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Based on this, it is necessary to provide a method for reducing the activity of highly active lithium hydride powders for the problems existing in the existing methods for reducing the activity of highly active lithium hydride powders, which can quickly reduce the activity of highly active lithium hydride powders, It prevents combustion and explosion during the digestion process, thereby reducing the safety risk of lithium hydride powder digestion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Place 3-5kg of high-activity lithium hydride powder in a volume of 0.5-1.0m 3 in the work box. The high-activity lithium hydride powder is contained in a stainless steel plate and evenly spread in the stainless steel plate. The material thickness is controlled within the range of 5-15mm. The humidity in the working box is controlled within the range of 60-90%. Turn and stir the material every 12 to 24 hours. Stir and stir evenly. Turn the bottom material over and the top material on the bottom. After about 60 days in the working box, about 75-85% of the highly active lithium hydride powder has been converted into inactive substances, which are then digested.

Embodiment 2

[0044] In the volume of 0.5 ~ 1.0m 3 In a work box, mix 3 to 5 kg of high-activity lithium hydride powder and water-absorbing substance evenly, the water-absorbing substance is lithium chloride powder, and the mass ratio of high-activity lithium hydride powder and water-absorbing substance is 1:3, and the mixture A is obtained Then the mixture A is fully stirred with the material with water of crystallization to make it evenly mixed, the material with water of crystallization is lithium hydroxide monohydrate, and the mass ratio of lithium hydride powder with high activity to the material with water of crystallization is 1:2, Obtain mixture B; move the mixture B out of the working box, put it in the material tray, spread it evenly, and turn and stir it every 3 to 6 hours. After about 5-6 days, about 75-85% of the high-activity lithium hydride powder has been converted into inactive substances, and then it is digested. During the digestion process, there will be no dangers such...

Embodiment 3

[0046] In the volume of 0.5 ~ 1.0m 3In a working box, mix 3 to 5 kg of highly active lithium hydride powder and a water-absorbing substance evenly, the water-absorbing substance is lithium bromide powder, and the mass ratio of the high-activity lithium hydride powder to the water-absorbing substance is 1:3 to obtain a mixture A; then After the mixture A and the substance with crystal water are fully stirred to make them evenly mixed, the substance with crystal water is lithium hydroxide monohydrate, and the mass ratio of high-activity lithium hydride powder to the substance with crystal water is 1:2, and the mixture is obtained B; Move the mixture B out of the working box, put it in the material tray, spread it evenly, and turn and stir it every 3 to 6 hours. After about 5-6 days, about 75-85% of the high-activity lithium hydride powder has been converted into inactive substances, and then it is digested. During the digestion process, there will be no dangers such as burning ...

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PUM

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Abstract

The invention particularly relates to a method for reducing the activity of high-activity lithium hydride powder, which comprises the following steps: mixing the high-activity lithium hydride powder with a substance for reducing the activity of the high-activity lithium hydride powder to obtain a mixture; and standing the mixture in the air, so as to reduce the activity of the high-activity lithium hydride powder to a state that combustion and explosion cannot happen during digestion. According to the method for reducing the activity of the high-activity lithium hydride powder provided by the invention, the activity of the high-activity lithium hydride powder can be quickly reduced, so that the high-activity lithium hydride powder cannot be combusted, exploded and the like in a digestion process, and the safety risk of digestion of the lithium hydride powder is reduced.

Description

technical field [0001] The invention belongs to the technical field of high-activity powder processing, and in particular relates to a method for reducing the activity of high-activity lithium hydride powder. Background technique [0002] Lithium hydride powder with a particle size of more than 200 mesh is called high-activity lithium hydride powder. Its chemical properties are very active, and it will burn and explode in air with high humidity. During the digestion process of high-activity lithium hydride powder with water, the chemical reaction speed is very fast, and a large amount of heat and hydrogen are released during the reaction, which is prone to combustion and even explosion. Therefore, the activity of the high-activity lithium hydride powder must be reduced before digestion, that is, the chemical reaction rate when the high-activity lithium hydride powder is digested is reduced. [0003] At present, the method to reduce the activity of high-activity lithium hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/34C01B6/04
CPCC01B6/34C01B6/04
Inventor 李辉赵祥忠王超漆阳严波
Owner CNNC JIANZHONG NUCLEAR FUEL
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