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Method for preparing rare earth element-compounded powder extinguishing agent through supersonic jet milling

A technology of supersonic air flow and rare earth elements, which is applied in fire prevention equipment, etc., can solve the problem of less application of powder fire extinguishing agent, and achieve the effect of mass industrial production, simple operation, rapid and uniform compounding

Active Publication Date: 2021-03-05
CIVIL AVIATION UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Supersonic airflow pulverization technology is a new pulverization engineering technology developed with modern high technology and new material industry. Less, especially for powder fire extinguishing agents containing multiple composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The supersonic jet pulverization method provided by the present embodiment prepares the powder fire extinguishing agent method of rare earth element composite, and comprises the following steps carried out in order:

[0019] (1) Mix ammonium dihydrogen phosphate and lanthanum carbonate uniformly according to the mass ratio of 96:4, and then use a supersonic jet mill to pulverize and refine to make ultrafine powder; wherein the air pressure of the supersonic jet mill is 0.75 MPa;

[0020] (2) Mix the above-mentioned superfine powder and bentonite according to the mass ratio of 85:15 to make a mixture, then add emulsified silicone oil accounting for 1% of the total mixture and mix evenly, and then carry out the surface treatment at 60°C. Hydrophobic treatment for 8 hours, and finally drying at 100°C for 2 hours to obtain a high-efficiency ultrafine powder fire extinguishing agent.

[0021] By cup burner (Cup-burner) test, the high-efficiency superfine powder fire extingu...

Embodiment 2

[0023] The supersonic jet pulverization method provided by the present embodiment prepares the powder fire extinguishing agent method of rare earth element composite, and comprises the following steps carried out in sequence:

[0024] (1) Mix ammonium monohydrogen phosphate and cerium oxide uniformly according to the mass ratio of 93:7, and then use a supersonic jet mill to pulverize and refine to make ultrafine powder; wherein the air pressure of the supersonic jet mill is 0.75 MPa;

[0025] (2) Mix the above ultrafine powder and zeolite according to the mass ratio of 85:15 to make a mixture, then add emulsified silicone oil accounting for 1% of the total mixture and mix evenly, and then carry out surface hydrophobic treatment at 60°C 8 hours, and finally dried at 100°C for 2 hours to obtain a high-efficiency ultrafine powder fire extinguishing agent.

[0026] By cup burner (Cup-burner) test, the high-efficiency superfine powder fire extinguishing agent provided by the prese...

Embodiment 3

[0028] The supersonic jet pulverization method provided by the present embodiment prepares the powder fire extinguishing agent method of rare earth element composite, and comprises the following steps carried out in sequence:

[0029] (1) Mix potassium bicarbonate and yttrium phosphate uniformly according to the mass ratio of 95:5, and then use a supersonic airflow mill to pulverize and refine to make ultrafine powder; wherein the air pressure of the supersonic airflow mill is 0.75MPa ;

[0030] (2) Mix the above ultrafine powder and perlite according to the mass ratio of 85:15 to make a mixture, then add emulsified silicone oil accounting for 1% of the total mixture and mix evenly, and then perform surface hydrophobicity at 60°C Treat for 8 hours, and finally dry at 100°C for 2 hours to obtain a high-efficiency ultrafine powder fire extinguishing agent.

[0031] By cup burner (Cup-burner) test, the high-efficiency superfine powder fire extinguishing agent provided by the pre...

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Abstract

The invention provides a method for preparing a rare earth element-compounded powder extinguishing agent through supersonic jet milling. The preparation method comprises the following steps: mixing and refining a rare earth element compound and a base material of a powder extinguishing agent by using a supersonic jet milling method, and performing surface modification by using emulsified siliconeoil, thereby obtaining the high-efficiency ultrafine powder extinguishing agent. According to the method, the fire extinguishing performance of the composite fire extinguishing agent is further improved by utilizing the efficient fire extinguishing performance of rare earth elements, and a rare earth element compound and the base material of the powder fire extinguishing agent are refined simultaneously by utilizing the supersonic jet milling method, so the particle size of the raw materials can be reduced, and the raw materials of the fire extinguishing agent can be mixed more uniformly; andbesides, due to the fact that the surfaces of effective components and rare earth components of the fire extinguishing agent can generate fresh surfaces with high activity under the action of high-speed airflow, the effective components and the rare earth components of the fire extinguishing agent generate chemical bonding or physical adsorption through high turbulence effect and mechanochemical effect, and therefore, the compounding effect of the effective components and the rare earth components of the fire extinguishing agent is better.

Description

technical field [0001] The invention belongs to the technical field of preparation of superfine powder fire extinguishing agent, in particular to a method for preparing a powder fire extinguishing agent compounded with rare earth elements by a supersonic jet pulverization method. Background technique [0002] Due to its excellent characteristics of high fire extinguishing efficiency and low ODP and GWP values, powder fire extinguishing agent is considered to be one of the potential substitutes for "halon" fire extinguishing agent. At present, the active ingredients of powder fire extinguishing agents are mainly phosphate and carbonate. Although the fire extinguishing performance of this type of fire extinguishing agent can be improved to a certain extent by refining the particle size of the fire extinguishing agent, for ultrafine powder fire extinguishing agents (especially granular smaller than the limit particle size of the fire extinguishing agent), its fire extinguishing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00
CPCA62D1/0014
Inventor 周晓猛李秀涛
Owner CIVIL AVIATION UNIV OF CHINA
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