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Preparation method for fire preventing and extinguishing colloid material for coal mines

A colloidal material and anti-fire extinguishing technology, which is applied in the direction of fire prevention equipment, etc., can solve the problems of rare fire extinguishing material research, high cost of composite hydrogel, and low fire extinguishing efficiency, so as to improve fire extinguishing efficiency, good fire extinguishing effect, low cost effect

Inactive Publication Date: 2017-06-30
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, although there have been some studies on the application of bentonite and kaolin in the application of fire extinguishing materials, there are generally problems of high cost of composite hydrogels, high temperature resistance, poor salt and alkali resistance, low water absorption, and low fire extinguishing efficiency.
Moreover, fire extinguishing materials are applied in different fields, which are greatly affected by factors such as the environment, and the fire extinguishing performance will also vary greatly.
Therefore, for the environment in different fields, it is very critical to study fire extinguishing materials with strong pertinence, and it is also a hot spot in this field. Before this application, there were not many fire extinguishing materials in the field of coal mines.

Method used

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  • Preparation method for fire preventing and extinguishing colloid material for coal mines
  • Preparation method for fire preventing and extinguishing colloid material for coal mines
  • Preparation method for fire preventing and extinguishing colloid material for coal mines

Examples

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Embodiment 1

[0033] At room temperature, titrate acrylic acid with a sodium hydroxide solution with a mass fraction of 25%, and stir while dripping, so that the neutralization degree of acrylic acid is 70%; add bentonite to water, and stir to make a suspension with a concentration of 20 wt%. Add kaolin into water, stir to make a suspension with a concentration of 20 wt%; add neutralized acrylic acid, kaolin, bentonite, propylene to a 500mL four-necked bottle equipped with a magnetic stirrer, a thermometer and an airway Amide, N,N'-methylenebisacrylamide, potassium persulfate, in which the mass ratio of acrylic acid: kaolin: bentonite: acrylamide = 100:5:10:50, acrylic acid: N,N'-methylenebis Acrylamide: Potassium persulfate mass ratio = 100:0.25:0.1, start the magnetic stirrer, protect with nitrogen, and gradually raise the temperature to 80°C, react for 2 hours, after the reaction, take out the product, cut it into pieces, and put it in an oven at 90°C Medium drying to constant weight to ...

Embodiment 2

[0036] At room temperature, titrate acrylic acid with a sodium hydroxide solution with a mass fraction of 25%, stirring while dripping, so that the neutralization degree of acrylic acid is 60%; add bentonite to water and stir to make a suspension with a concentration of 25 wt%. Add kaolin into water and stir to make a suspension with a concentration of 25 wt%. Add neutralized acrylic acid, kaolin, bentonite, and propylene to a 500mL four-necked bottle equipped with a magnetic stirrer, a thermometer, and an airway tube. Amide, N, N'-methylenebisacrylamide, potassium persulfate, wherein the mass ratio of acrylic acid: kaolin: bentonite: acrylamide = 100:10:10:60, acrylic acid: N,N'-methylene The mass ratio of bisacrylamide:potassium persulfate=100:0.2:0.05, start the magnetic stirrer, protect it with nitrogen, and gradually raise the temperature to 80°C, react for 2 hours, after the reaction, take out the product, cut it into pieces, and put it at 100°C Baked in an oven to const...

Embodiment 3

[0039] At room temperature, titrate acrylic acid with a sodium hydroxide solution with a mass fraction of 25%, and stir while dripping, so that the neutralization degree of acrylic acid is 90%; add bentonite to water, and stir to make a suspension with a concentration of 15% by weight; Add kaolin into water and stir to make a suspension with a concentration of 15% by weight; add neutralized acrylic acid, kaolin, bentonite, acrylamide, N, N'-methylenebisacrylamide, potassium persulfate, wherein the mass ratio of acrylic acid: kaolin: bentonite: acrylamide = 100: 20: 5: 45, the mass ratio of acrylic acid: initiator: crosslinking agent = 100 : 0.15: 0.25, start the magnetic stirrer, pass nitrogen protection, and gradually raise the temperature to 80°C, and react for 1.5 h. After the reaction, the product was taken out, cut into pieces, and dried in an oven at 95°C to constant weight to obtain a dry granular product, which was crushed and passed through an 80-mesh sieve. The wate...

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Abstract

The invention relates to a preparation method for a fire preventing and extinguishing colloid material for coal mines. According to the method, crylic acid and acrylamide serve as water absorption monomers, bentonite and kaolin serve as a filling agent or an enhancer, N,N'-methylene bisacrylamide serves as a cross-linking agent, and potassium peroxodisulfate serves as an initiator; an aqueous solution polymerization method is adopted for preparing bentonite / kaolin / crylic acid-acrylamide plural gel. The bentonite / kaolin / crylic acid-acrylamide plural gel prepared through the method is low in cost, resistant to high temperature and resistant to salt and alkali, and the fire preventing and extinguishing efficiency of the colloid material is greatly improved; the colloid material, loess, coal ash, water and the like are mixed and stirred to prepare coal mine fire preventing and extinguishing slurry; and the slurry material is high in water absorption capability, good in fire extinguishing effect and particularly suitable for fire preventing and extinguishing of the coal mines.

Description

technical field [0001] The invention relates to the field of preparation of coal mine fire-preventing colloidal materials, in particular to a preparation method of coal mine fire-preventing colloidal materials. Background technique [0002] Spontaneous combustion of coal is one of the major hidden dangers that threaten the safe production of coal mines. In order to prevent spontaneous combustion of coal, measures such as filling yellow mud, injecting colloid, and spraying inhibitors are widely used at home and abroad. Colloid has been widely used in mine fire prevention and extinguishing due to its good water absorption, water retention and high temperature resistance. At present, the colloids used mainly include water glass gels and polymer gels. Among them, water glass gel is easy to lose water, shrink in the air, then dry and crack, and gradually pulverize. This phenomenon is especially serious after being crushed under pressure, and its effect of preventing coal sponta...

Claims

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Application Information

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IPC IPC(8): A62D1/00C08F220/06C08F220/56C08F222/38
CPCA62D1/0064C08F220/06C08F220/56C08F222/385
Inventor 赵艳云胡相明左亚雯程卫民
Owner SHANDONG UNIV OF SCI & TECH
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