D-type dry powder extinguishing agent and preparation method thereof

A technology of dry powder fire extinguishing agent and weight percentage, which is applied in the direction of fire prevention equipment, etc. It can solve the problems of expensive imported dry powder, failure to extinguish metal fires, and failure to achieve fire extinguishing purposes, and achieve low price, good compactness, and fast fire extinguishing speed Effect

Active Publication Date: 2014-10-01
JIANGXI JIN XIAN FIRE CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Class D fires refer to metal fires, usually potassium, sodium, magnesium, lithium and aluminum-magnesium alloy fires. With the development of modern industry and the wide application of various metals in various industries, metal fires occur from time to time, because these metals are very active. Strong, at room temperature, it is easy to react violently with oxygen and nitrogen in the air, and release a lot of heat. It is easy to spontaneously ignite and explode. Water and CO2 cannot achieve the purpose of fire extinguishing, but will increase the degree of reaction and make the fire bigger. Dry powder fire extinguishing agents can not achieve the purpose of extinguishing metal fires. At present, imported D-type dry powder is usually used to extinguish fires in China. The price of imported dry powder is very expensive. Therefore, research on D-type dry powder fire extinguishing agents has become an imperative task for my country's fire protection industry.

Method used

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  • D-type dry powder extinguishing agent and preparation method thereof
  • D-type dry powder extinguishing agent and preparation method thereof
  • D-type dry powder extinguishing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A kind of preparation method of class D dry powder fire extinguishing agent comprises the following steps:

[0023] 1) Add 48% by weight of sodium chloride and 32% by weight of potassium chloride into the mixing pot, stir for 10 minutes, then add 1% by weight of high-boiling silicone oil by spraying, stir evenly, and heat at 100°C Heating at constant temperature until the water content of the mixture is lower than 0.2%, stopping heating and cooling to normal temperature to obtain product A;

[0024] 2) The product A is pulverized by a ring roller mill until more than 80% of the particles have a particle size of 15-40 microns to obtain the product B;

[0025] 3) Add 3% clay by weight, 4% mica by weight, 6% boron nitride by weight and the product B into the reaction vessel, heat up and stir, when the temperature of the mixture rises to 55°C , add 2% by weight of high-boiling silicone oil, stir evenly, then add 4% by weight of white carbon black, heat at a constant temper...

Embodiment 2

[0027] A kind of preparation method of class D dry powder fire extinguishing agent comprises the following steps:

[0028] 1) Add 50% by weight of sodium chloride and 30% by weight of potassium chloride into the mixing pot, stir for 8 minutes, then add 1% by weight of high-boiling silicone oil by spraying, stir evenly, and heat at 110°C Heating at constant temperature until the water content of the mixture is lower than 0.2%, stopping heating and cooling to normal temperature to obtain product A;

[0029] 2) The product A is pulverized by a ring roller mill until more than 80% of the particles have a particle size of 15-40 microns to obtain the product B;

[0030] 3) Add 4% white clay by weight, 6% mica by weight, 5% boron nitride by weight and the product B into the reaction vessel, heat up and stir, when the mixture is heated up to 55°C , add 1% by weight of high-boiling silicone oil, stir evenly, then add 3% by weight of white carbon black, heat at a constant temperature a...

Embodiment 3

[0032] A kind of preparation method of class D dry powder fire extinguishing agent comprises the following steps:

[0033] 1) Add 45% by weight of sodium chloride and 35% by weight of potassium chloride into the mixing pot, stir for 15 minutes, then add 2% by weight of high-boiling silicone oil by spraying, stir evenly, and heat at 85°C Heating at constant temperature until the water content of the mixture is lower than 0.2%, stopping heating and cooling to normal temperature to obtain product A;

[0034] 2) The product A is pulverized by a ring roller mill until more than 80% of the particles have a particle size of 15-40 microns to obtain the product B;

[0035] 3) Add 2% clay by weight, 3% mica by weight, 6% boron nitride by weight and the product B into the reaction vessel, heat up and stir, when the mixture is heated to 55°C , add 2% by weight of high-boiling silicone oil, stir evenly, then add 5% by weight of white carbon black, heat at a constant temperature of 85°C un...

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PUM

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Abstract

The invention discloses a D-type dry powder extinguishing agent and a preparation method thereof. The D-type dry powder extinguishing agent comprises the following components in percentage by weight: 45-50% of potassium chloride, 30-35% of sodium chloride, 2-4% of carclazyte, 3-6% of mica, 5-8% of boron nitride, 3-5% of white carbon black and 2-5% of high-boiling silicone oil. The D-type dry powder extinguishing agent has the beneficial effects that the extinguishing speed is high, and the extinguishing time of the D-type dry powder extinguishing agent is only 1.5-2.5 minutes while the ordinary extinguishing time is more than 3 minutes; the compactness is high, and metal derivatives generated after the extinguishing are stable in chemical property and are not prone to re-burn; the heat dissipation performance is good, the temperature decrease speed is high, and the cost is low.

Description

technical field [0001] The invention relates to the field of powder fire extinguishing agents, in particular to a Class D dry powder fire extinguishing agent and a preparation method thereof. Background technique [0002] Class D fires refer to metal fires, usually potassium, sodium, magnesium, lithium and aluminum-magnesium alloy fires. With the development of modern industry and the wide application of various metals in various industries, metal fires occur from time to time, because these metals are very active. Strong, at room temperature, it is easy to react violently with oxygen and nitrogen in the air, and release a lot of heat. It is easy to spontaneously ignite and explode. Water and CO2 cannot achieve the purpose of fire extinguishing, but will increase the degree of reaction and make the fire bigger. Dry powder fire extinguishing agents can’t achieve the purpose of extinguishing metal fires. At present, imported Class D dry powder is usually used to extinguish fires...

Claims

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Application Information

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IPC IPC(8): A62D1/00
Inventor 易小明
Owner JIANGXI JIN XIAN FIRE CHEM IND
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