Preparation method of fire prevention and extinguishing material for coal mine

A fire prevention and coal mine technology, applied in the field of flame retardant materials, can solve the problems of poor fire prevention effect and easy cracking, and achieve the effects of fire extinguishing, strong water retention and prevention of water loss

Inactive Publication Date: 2020-04-17
李宏伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The technical problem to be solved by the present invention is to solve the problem that most coal mines use cheap and common masonry, yellow mud, and fly ash as the materials used for u

Method used

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  • Preparation method of fire prevention and extinguishing material for coal mine

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Example Embodiment

[0039] Example 1

[0040] Take chitosan, ammonium persulfate, the mixed solution, the volume fraction of 1% acetic acid solution, mix the chitosan and the volume fraction of 1% acetic acid solution, and perform agitation to obtain reaction solution A, which is added to the reaction solution and mixed Liquid, constant temperature stirring treatment, that is reaction solution B, add ammonium persulfate to reaction solution B, continue to stir for 10 minutes, and then get the reactant; take the reactant, sodium-based montmorillonite, acrylic acid, water glass, N, N' -Methylene bisacrylamide, deionized water, mix the reactants and deionized water, and ultrasonically disperse to obtain a dispersion. Add acrylic acid, N,N'-methylene bisacrylamide, and sodium to the dispersion. The montmorillonite and water glass are stirred and reacted to obtain a semi-finished product; the semi-finished product is washed 3 times with deionized water, and the pH value is adjusted, and the precipitate i...

Example Embodiment

[0041] Example 2

[0042] Take chitosan, ammonium persulfate, the mixed solution, the volume fraction of 1% acetic acid solution, mix the chitosan and the volume fraction of 1% acetic acid solution, and perform agitation to obtain reaction solution A, which is added to the reaction solution and mixed Liquid, constant temperature stirring treatment, to obtain reaction solution B, add ammonium persulfate to reaction solution B, continue to stir for 13 minutes, to obtain the reactant; take the reactant, sodium-based montmorillonite, acrylic acid, water glass, N, N' -Methylene bisacrylamide, deionized water, mix the reactants and deionized water, and ultrasonically disperse to obtain a dispersion. Add acrylic acid, N,N'-methylene bisacrylamide, and sodium to the dispersion. Montmorillonite and water glass are stirred and reacted to obtain a semi-finished product; wash the semi-finished product with deionized water 4 times, adjust the pH value, and filter to obtain a precipitate, wash...

Example Embodiment

[0043] Example 3

[0044] Take chitosan, ammonium persulfate, the mixed solution, the volume fraction of 1% acetic acid solution, mix the chitosan and the volume fraction of 1% acetic acid solution, and perform agitation to obtain reaction solution A, which is added to the reaction solution and mixed Liquid, constant temperature stirring treatment, namely reaction solution B, add ammonium persulfate to reaction solution B, continue to stir for 15 minutes, and then get the reactant; take the reactant, sodium-based montmorillonite, acrylic acid, water glass, N, N' -Methylene bisacrylamide, deionized water, mix the reactants and deionized water, and ultrasonically disperse to obtain a dispersion. Add acrylic acid, N,N'-methylene bisacrylamide, and sodium to the dispersion. The montmorillonite and water glass are stirred and reacted to obtain a semi-finished product; the semi-finished product is washed 5 times with deionized water, and the pH value is adjusted, and the precipitate is...

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Abstract

The invention relates to a preparation method of a fire preventing and extinguishing material for a coal mine and belongs to the technical field of flame-retardant materials. The prepared fire preventing and extinguishing material for the coal mine is water absorption gel, a large amount of condensed water and a small amount of immobile water exist in the water absorption gel, and 2-3 water molecular layers with the thickness of 0.5-0.6 nm are formed on the surfaces of molecules through hydrophilic hydration; the first layer is hydrated water formed by polar ion groups and water molecules through coordination bonds or hydrogen bonds; the second layer is a combined water layer formed by water molecules and hydrated water through hydrogen bonds; the gel absorbs water mainly through the interaction between internal three-dimensional space networks, a large amount of free water is absorbed and stored in grids, and the larger the pore diameter of the gel three-dimensional space networks is,the higher the water absorption rate is; the water absorption gel covering the surface of the coal body reduces the probability of contact between a coal body and oxygen, blocks an air leakage channel, reduces the oxygen concentration, absorbs heat for cooling and reduces the oxidation activity of the coal, so that the prepared fire preventing and extinguishing material for the coal mine is highin fire extinguishing efficiency and high in speed.

Description

technical field [0001] The invention relates to a preparation method of a fire-proofing material for coal mines, and belongs to the technical field of flame-retardant materials. Background technique [0002] As one of the major natural disasters in coal mining, coal spontaneous combustion poses a serious threat to the coal mining industry. Coal spontaneous combustion is an objective phenomenon existing in nature, but if it cannot be effectively controlled, it will seriously affect the healthy development of my country's coal industry. [0003] The hazards of coal mine fires mainly include the following aspects: [0004] (1) Directly burn coal resources, destroy underground construction equipment, and cause heavy economic losses; [0005] (2) Release CO, SO 2 and other harmful gases, endangering the life safety of mine workers; [0006] (3) Cause chain reactions such as gas explosions and expand the scope of disasters; [0007] (4) Cause the coal mine to stop production ...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F222/38C08F2/44C08J3/075C08L51/02C08K3/34A62D1/00C09K21/14
CPCA62D1/0007C08F2/44C08F251/00C08J3/075C08J2351/02C08K3/34C08K3/346C09K21/14C08F220/06C08F222/385
Inventor 李宏伟
Owner 李宏伟
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