Ultrafine dry powder extinguishing agent and preparation method thereof

A technology of ultra-fine dry powder and fire extinguishing agent, which is applied in the direction of fire prevention equipment, etc. It can solve the problems of large particle size, high moisture absorption rate, and easy agglomeration, and achieve uniform particles, low moisture content and moisture absorption rate, and low production cost. Effect

Inactive Publication Date: 2020-05-12
ZHENGZHOU HAITIAN FIREFIGHTING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problems of large particle size, high moisture absorption rate and easy caking of the existing dry powder fire extinguishing agent, the present invention provides an ultrafine dry powder fire extinguishing agent and its preparation method

Method used

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  • Ultrafine dry powder extinguishing agent and preparation method thereof
  • Ultrafine dry powder extinguishing agent and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] The present embodiment provides a kind of superfine dry powder fire extinguishing agent, and its preparation method comprises the following steps:

[0021] (1) Calculated in parts by mass, mix 82 parts of monoammonium phosphate, 8 parts of white carbon black, 5 parts of mica powder and 5 parts of talcum powder, put them into a mill for coarse grinding, and pass through an 80-mesh sieve after coarse grinding ;

[0022] (2) Throwing the particles screened out after coarse grinding in step (1) into a pulverizer for fine pulverization until the particle size is less than 20 μm;

[0023] (3) Stir the particles obtained in step (2) evenly, raise the temperature to 90°C to maintain a constant temperature, keep stirring at a speed of 600r / min and add 1 part of silicone oil, then increase the speed to 1400r / min, and keep stirring, After being dried at a constant temperature until the water content is lower than 0.12wt%, the product is obtained.

Embodiment 2

[0025] The present embodiment provides a kind of superfine dry powder fire extinguishing agent, and its preparation method comprises the following steps:

[0026] (1) Calculated in parts by mass, mix 95 parts of monoammonium phosphate, 4 parts of white carbon black, 2 parts of mica powder and talcum powder and put them into a pulverizer for rough grinding, then pass through a 80-mesh sieve after rough grinding;

[0027] (2) Throwing the particles screened out after coarse grinding in step (1) into a pulverizer for fine pulverization until the particle size is less than 20 μm;

[0028] (3) Stir the particles obtained in step (2) evenly, raise the temperature to 90°C to maintain a constant temperature, stir continuously at a speed of 600r / min and add 0.2 parts of silicone oil, then increase the speed to 1400r / min, and keep stirring, After being dried at a constant temperature until the water content is lower than 0.12wt%, the product is obtained.

Embodiment 3

[0030] The present embodiment provides a kind of superfine dry powder fire extinguishing agent, and its preparation method comprises the following steps:

[0031] (1) Calculated in parts by mass, mix 86 parts of monoammonium phosphate, 6 parts of white carbon black, 3 parts of mica powder and 3 parts of talcum powder, put them into a mill for coarse grinding, and pass through a 80-mesh sieve after coarse grinding ;

[0032] (2) Throwing the particles screened out after coarse grinding in step (1) into a pulverizer for fine pulverization until the particle size is less than 20 μm;

[0033] (3) Stir the particles obtained in step (2) evenly, raise the temperature to 90°C to maintain a constant temperature, keep stirring at a speed of 600r / min and add 0.5 parts of silicone oil, then increase the speed to 1400r / min, and keep stirring, After being dried at a constant temperature until the water content is lower than 0.12wt%, the product is obtained.

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Abstract

The invention discloses an ultrafine dry powder extinguishing agent and a preparation method thereof, and relates to the technical field of extinguishing agents. A purpose of the invention is to solvethe problems that the existing dry powder extinguishing agent is large in particle size, high in moisture absorption rate and easy to cake. The ultrafine dry powder extinguishing agent comprises thefollowing main raw materials in parts by mass: 82-95 parts of monoammonium phosphate, 4-8 parts of white carbon black, 0.2-1 part of silicone oil, 2-5 parts of mica powder and 2-5 parts of talcum powder, and has the advantages of low particle moisture content, low moisture absorption rate, water repellency, strong anti-caking ability and long storage life.

Description

technical field [0001] The invention relates to the technical field of fire extinguishing agents, and more specifically relates to an ultrafine dry powder fire extinguishing agent and a preparation method thereof, which are used to improve the fire extinguishing performance and shelf life of ordinary dry powder fire extinguishing agents. Background technique [0002] Combustion is a severe chain oxidation reaction carried out by the continuous transmission of active free radicals. The active extinguishing components in the dry powder fire extinguishing agent capture and terminate the free radicals generated by the combustion reaction, reducing the rate of the combustion reaction. When the concentration of the dry powder fire extinguishing agent in the flame is high enough and the contact area with the flame is large enough, the rate of free radical termination is greater than that of the combustion reaction. The rate at which the reaction is formed, the chain combustion reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00
CPCA62D1/0014
Inventor 李世忠王宏贞张兆兴
Owner ZHENGZHOU HAITIAN FIREFIGHTING MATERIAL CO LTD
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