CN113209539A - Coal mine composite colloid fire prevention and extinguishing material and preparation method thereof - Google Patents
Coal mine composite colloid fire prevention and extinguishing material and preparation method thereof Download PDFInfo
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0064—Gels; Film-forming compositions
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0028—Liquid extinguishing substances
- A62D1/005—Dispersions; Emulsions
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0071—Foams
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components
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Abstract
The invention discloses a coal mine composite colloid fire prevention and extinguishing material which is prepared from the following raw materials in parts by weight: 1-2 parts of sodium carboxymethylcellulose, 1-2 parts of agar, 12-15 parts of fly ash, 0.1-0.2 part of polyacrylamide, 3-5 parts of cross-linking agent, 1-2 parts of sodium bicarbonate, 3-4 parts of flame retardant, 3-5 parts of foaming agent and 90-100 parts of water. The material has low cost, good water retention and flame retardant properties and excellent fire prevention and extinguishing properties.
Description
Technical Field
The invention relates to the technical field of mine fire prevention and extinguishing materials.
Background
Coal mine fires easily cause accidents such as gas and dust explosion, and the damage is great, so fire prevention and control are the key points of coal mine safety production. The main cause of coal mine fire is coal bed spontaneous combustion, and due to the adoption of technologies such as fully mechanized top coal caving mining and gas drainage in coal mining, air leakage in a goaf or excessive residual coal is left, and coal bed spontaneous combustion is easily caused. The main existing coal mine fire prevention and extinguishing means adopts fire prevention and extinguishing materials, so that the safety is high, and the effect is obvious.
The commonly used fire prevention and extinguishing materials comprise colloid materials, slurry, foam, stopping agents and the like, and the fire prevention and extinguishing mechanism is as follows: adding the materials into water according to a certain proportion by using quantitative adding equipment to thicken the water (or slurry), then injecting the thickened liquid into the loose coal body by using a pump (or a grouting system), absorbing heat after the thickened liquid permeates into coal body cracks and tiny pores under the action of pump pressure and heavy action, reducing the temperature of the coal body, blocking the pores and the cracks of the loose coal body, preventing oxygen molecules from permeating into the coal body, reducing the contact probability of coal oxygen, reducing the oxidation heat release performance of the coal body and reducing the spontaneous combustibility; or the flame-retardant coating is covered on the surface of a burnt coal seam to achieve the effects of isolating oxygen, reducing temperature, absorbing heat and retarding flame. The colloid material mainly comprises a cement fly ash gel material and a high polymer gel material, wherein the cement fly ash gel material has the advantages of relatively long service life, low price, no toxicity and good permeability, is continuously used up to now, and has the defects of large use amount, long gel time, incapability of being accumulated to a high place, poor liquidity, easiness in blocking a pipeline and easiness in cracking after a gel layer is formed; the polymer gel material has good fluidity, good fire prevention and extinguishing effect and high strength of the gel layer, but the cost is a little higher. Therefore, a great deal of research is focused on the composite colloid fire prevention and extinguishing material at present, and the fire prevention and extinguishing mechanism of the composite colloid fire prevention and extinguishing material is to integrate the advantages of all materials so as to research the composite colloid fire prevention and extinguishing material with excellent chemical performance, remarkable inhibition fire prevention and extinguishing effect and low price.
Disclosure of Invention
In view of the above, the invention aims to provide a coal mine composite colloid fire prevention and extinguishing material which is low in material cost, good in water retention and flame retardance and excellent in fire prevention and extinguishing performance, aiming at the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a coal mine composite colloid fire prevention and extinguishing material is prepared from the following raw materials in parts by weight: 1-2 parts of sodium carboxymethylcellulose, 1-2 parts of agar, 12-15 parts of fly ash, 0.1-0.2 part of polyacrylamide, 3-5 parts of cross-linking agent, 1-2 parts of sodium bicarbonate, 3-4 parts of flame retardant, 3-5 parts of foaming agent and 90-100 parts of water.
Further, the cross-linking agent is a montmorillonite-loaded metal ion cross-linking agent.
Further, the metal ion crosslinking agent is prepared by the following steps:
1) slowly dripping sodium hydroxide solution into the aluminum chloride solution, quickly heating until the solution is boiled after dripping, and cooling after 30min to obtain aluminum hydroxide;
2) adding montmorillonite into aluminum hydroxide, stirring and mixing at 70-80 deg.C for 60-70min, vacuum filtering, and drying to obtain product;
the molar ratio of the sodium hydroxide to the aluminum chloride is 2:1, the weight ratio of the montmorillonite to the aluminum chloride is 0.1 mol: 15-20 g.
Further, the flame retardant is formed by mixing ammonium polyphosphate, magnesium oxide fibers and polyurethane fibers according to the weight ratio of 1-2:1: 1.
Further, the flame retardant is a modified flame retardant, and the specific modification method comprises the following steps: soaking the flame retardant in an ethanol aqueous solution of KH550, stirring for 1h at 50-60 ℃, and drying after suction filtration to obtain a product; the weight ratio of the flame retardant to the KH550 is 1: 20-25.
Further, the foaming agent is formed by mixing hydrogen peroxide, hollow glass beads and dimethyl silicone oil according to the weight ratio of 2:1: 0.2-0.3.
A preparation method of a coal mine composite colloid fire prevention and extinguishing material comprises the following steps:
(1) mixing sodium carboxymethylcellulose, agar and one third of water, and stirring;
(2) uniformly mixing and stirring the fly ash, the polyacrylamide, the cross-linking agent, the flame retardant and one third of water;
(3) and (3) mixing the mixture obtained in the step (1) and the step (2) and the rest components, and uniformly stirring to obtain the product.
The invention has the beneficial effects that:
1. the invention provides a composite colloid fire prevention and extinguishing material, which takes fly ash, sodium carboxymethylcellulose and agar as base materials, and adds a cross-linking agent, a foaming agent and a fire retardant, so that the formed slurry has high fluidity, can quickly permeate into cracks and tiny pores of a coal body, generates a large amount of gas to form foam slurry, expands the volume of the slurry, and increases the diffusion volume and the diffusion radius of the slurry in the coal body, thereby increasing the covering and blocking effects and further improving the fire prevention and extinguishing effect; and then, the sodium carboxymethylcellulose and the agar are subjected to complexing and crosslinking to form gel under the action of the polyacrylamide and a metal crosslinking agent, and the fly ash gel is added into the network structure, so that the gel structure strength can be enhanced, the cost is reduced, a porous gel film is finally formed, oxygen is fully isolated, the water retention and flame retardance at high temperature are good, and the fire prevention and extinguishing performance is excellent.
2. In order to control the gelling time of the composite colloid, the adopted cross-linking agent is montmorillonite loaded with metal ion cross-linking agent, the montmorillonite is mineral clay, has large specific surface area, microporous structure and strong adsorbability, aluminum chloride is prepared into hydroxy aluminum and then loaded in the microporous structure of the montmorillonite, when the montmorillonite is slowly dispersed in water, part of the microporous structure is exposed, sodium bicarbonate is hydrolyzed in water, and aluminum ions can be slowly replaced in an acidic environment, so that sodium carboxymethyl cellulose, agar and the like are cross-linked and complexed to form the gelling. Therefore, the cross-linking agent has a certain slow release effect and can delay the gelling time, thereby prolonging the diffusion time and the diffusion radius of the fire-proof and fire-extinguishing material in the coal seam and further increasing the bonding property of the fire-proof and fire-extinguishing material and the coal seam.
3. In order to reduce the use amount of the flame retardant and increase the flame retardant effect, the flame retardant is a composite flame retardant which is a composite of ammonium polyphosphate, brucite fiber and polyimide fiber, wherein the ammonium polyphosphate is decomposed into N by heating2And the like, which can isolate oxygen; meanwhile, polyphosphoric acid or polymetaphosphoric acid is generated and is used as a strong dehydrating agent, so that the surface of the material is dehydrated and carbonized, and oxygen is further isolated; the compounded brucite fiber and polyimide fiber also have flame retardant property, wherein the flame retardant mechanism of the brucite fiber is that the brucite fiber is decomposed at 340 ℃, releases moisture and absorbs a large amount of heat, a generated MgO layer is attached to the surface of a combustible to form a fireproof layer, so that flame is prevented from entering and a matrix is prevented from contacting with air, and meanwhile, MgO particles can adsorb amorphous carbon to a certain degree, so that the effect of suppressing smoke is achieved. In addition, the polyimide fiber structure has aromatic ring and heterocyclic ring structures, and can be formed into aromatized carbon under high temperature, so that the carbon coating capability of the MgO layer on the surface is improved, a carbonized layer with a compact structure is formed, and the effects of flame retardance, isolation and smoke suppression are effectively realized. The three components are compounded, the flame-retardant and smoke-suppressing effects are obvious, and the using amount of the flame retardant can be greatly reduced.
In addition, the brucite and the polyimide are both of fiber structures, the brucite fiber has excellent mechanical property and good toughness, and the polyimide fiber is mixed and dispersed in the polyurethane resin, can prevent the resin from cracking after being cured and has the function of further enhancing and toughening.
4. In order to improve the interface bonding force between the flame retardant and the colloid, KH550 is adopted to modify the surface of the flame retardant, so that on one hand, the bonding property between the modified flame retardant and the interface is improved, and the mechanical property of the material is improved; on the other hand, silica and silicon carbon on the surface form a silica and carbon layer on the surface of the material at high temperature, so that oxygen can be isolated, and the flame retardant effect is further achieved.
5. The foamer forms for hydrogen peroxide, hollow glass microballon, dimethyl silicone oil mixture in this application, and hollow glass microballon can evenly adhere on the foam surface to prevent that the bubble from merging the grow and having run, can even foam and extension foam stability time, and the further reinforcing foam fineness of fatty acid polyoxyethylene monoester and stability enable porous foam gel structure in this application formation.
Detailed Description
The invention will now be further described with reference to specific examples.
Example 1
A coal mine composite colloid fire prevention and extinguishing material is prepared from the following raw materials in parts by weight: 1 part of sodium carboxymethylcellulose, 2 parts of agar, 12 parts of fly ash, 0.1 part of polyacrylamide, 6 parts of a cross-linking agent, 1 part of sodium bicarbonate, 3 parts of a flame retardant, 3 parts of a foaming agent and 90 parts of water.
Wherein the cross-linking agent is a montmorillonite-loaded metal ion cross-linking agent.
The cross-linking agent is prepared by the following steps:
1) slowly dripping sodium hydroxide solution into the aluminum chloride solution, quickly heating until the solution is boiled after dripping, and cooling after 30min to obtain aluminum hydroxide;
2) adding montmorillonite into aluminum hydroxide, stirring and mixing at 70 deg.C for 60-70min, vacuum filtering, and drying to obtain product;
the molar ratio of sodium hydroxide to aluminum chloride is 2:1, the concentrations of sodium hydroxide and aluminum chloride solutions are both 0.2mol/L, and the weight ratio of montmorillonite to aluminum chloride is 0.1 mol: 15 g.
The flame retardant is formed by mixing ammonium polyphosphate, magnesium oxide fiber and polyurethane fiber according to the weight ratio of 1:1:1, wherein the diameter of the brucite fiber is 2-6 mu m, the length of the brucite fiber is 800-1000 mu m, and the length of the polyimide fiber is 1-2 mm.
The flame retardant is a modified flame retardant, and the specific modification method comprises the following steps: soaking the flame retardant in an ethanol aqueous solution with the mass fraction of 2% KH550, stirring for 1h at 50-60 ℃, and drying after suction filtration to obtain a product; the weight ratio of the flame retardant to the KH550 is 1: 20.
The foaming agent is formed by mixing hydrogen peroxide, hollow glass beads and dimethyl silicone oil according to the weight ratio of 2:1: 0.2.
A preparation method of a coal mine composite colloid fire prevention and extinguishing material comprises the following steps:
(1) mixing sodium carboxymethylcellulose, agar and one third of water, and stirring;
(2) uniformly mixing and stirring the fly ash, the polyacrylamide, the cross-linking agent, the flame retardant and one third of water;
(3) and (3) mixing the mixture obtained in the step (1) and the step (2) and the rest components, and uniformly stirring to obtain the product.
Example 2
A coal mine composite colloid fire prevention and extinguishing material is prepared from the following raw materials in parts by weight: 1.2 parts of sodium carboxymethylcellulose, 1.8 parts of agar, 13 parts of fly ash, 0.12 part of polyacrylamide, 6.5 parts of a cross-linking agent, 1.2 parts of sodium bicarbonate, 3.2 parts of a flame retardant, 3.5 parts of a foaming agent and 90 parts of water.
Wherein the cross-linking agent is a montmorillonite-loaded metal ion cross-linking agent.
The cross-linking agent is prepared by the following steps:
1) slowly dripping sodium hydroxide solution into the aluminum chloride solution, quickly heating until the solution is boiled after dripping, and cooling after 30min to obtain aluminum hydroxide;
2) adding montmorillonite into aluminum hydroxide, stirring and mixing at 70 deg.C for 60-70min, vacuum filtering, and drying to obtain product;
the molar ratio of sodium hydroxide to aluminum chloride is 2:1, the solution concentration is 0.2mol/L, the weight ratio of montmorillonite to aluminum chloride is 0.1 mol: 16 g.
The flame retardant is formed by mixing ammonium polyphosphate, magnesium oxide fiber and polyurethane fiber according to the weight ratio of 1:1:1, wherein the diameter of the brucite fiber is 2-6 mu m, the length of the brucite fiber is 800-1000 mu m, and the length of the polyimide fiber is 1-2 mm.
The flame retardant is a modified flame retardant, and the specific modification method comprises the following steps: soaking the flame retardant in an ethanol aqueous solution (2%) of KH550, stirring for 1h at 50-60 ℃, and drying after suction filtration to obtain a product; the weight ratio of the flame retardant to the KH550 is 1: 21.
The foaming agent is formed by mixing hydrogen peroxide, hollow glass beads and dimethyl silicone oil according to the weight ratio of 2:1: 0.22.
Example 3
A coal mine composite colloid fire prevention and extinguishing material is prepared from the following raw materials in parts by weight: 1.5 parts of sodium carboxymethylcellulose, 1.5 parts of agar, 14 parts of fly ash, 0.15 part of polyacrylamide, 7 parts of a cross-linking agent, 1.5 parts of sodium bicarbonate, 3.5 parts of a flame retardant, 4 parts of a foaming agent and 95 parts of water.
Wherein the cross-linking agent is a montmorillonite-loaded metal ion cross-linking agent.
The cross-linking agent is prepared by the following steps:
1) slowly dripping sodium hydroxide solution into the aluminum chloride solution, quickly heating until the solution is boiled after dripping, and cooling after 30min to obtain aluminum hydroxide;
2) adding montmorillonite into aluminum hydroxide, stirring and mixing at 75 deg.C for 60-70min, vacuum filtering, and drying to obtain product;
the molar ratio of sodium hydroxide to aluminum chloride is 2:1, the solution concentration is 0.2mol/L, the weight ratio of montmorillonite to aluminum chloride is 0.1 mol: 18 g.
The flame retardant is formed by mixing ammonium polyphosphate, magnesium oxide fiber and polyurethane fiber according to the weight ratio of 1.5:1:1, wherein the diameter of the brucite fiber is 2-6 mu m, the length of the brucite fiber is 800-1000 mu m, and the length of the polyimide fiber is 1-2 mm.
The flame retardant is a modified flame retardant, and the specific modification method comprises the following steps: soaking the flame retardant in an ethanol aqueous solution (2%) of KH550, stirring for 1h at 50-60 ℃, and drying after suction filtration to obtain a product; the weight ratio of the flame retardant to the KH550 is 1: 22.
The foaming agent is formed by mixing hydrogen peroxide, hollow glass beads and dimethyl silicone oil according to the weight ratio of 2:1: 0.25.
Example 4
A coal mine composite colloid fire prevention and extinguishing material is prepared from the following raw materials in parts by weight: 1.8 parts of sodium carboxymethylcellulose, 1.2 parts of agar, 14 parts of fly ash, 0.18 part of polyacrylamide, 7.5 parts of a cross-linking agent, 1.8 parts of sodium bicarbonate, 3.8 parts of a flame retardant, 4.5 parts of a foaming agent and 95 parts of water.
Wherein the cross-linking agent is a montmorillonite-loaded metal ion cross-linking agent.
The cross-linking agent is prepared by the following steps:
1) slowly dripping sodium hydroxide solution into the aluminum chloride solution, quickly heating until the solution is boiled after dripping, and cooling after 30min to obtain aluminum hydroxide;
2) adding montmorillonite into aluminum hydroxide, stirring and mixing at 75 deg.C for 60-70min, vacuum filtering, and drying to obtain product;
the molar ratio of sodium hydroxide to aluminum chloride is 2:1, the solution concentration is 0.2mol/L, the weight ratio of montmorillonite to aluminum chloride is 0.1 mol: 19 g.
The flame retardant is formed by mixing ammonium polyphosphate, magnesium oxide fiber and polyurethane fiber according to the weight ratio of 1.5:1:1, wherein the diameter of the brucite fiber is 2-6 mu m, the length of the brucite fiber is 800-1000 mu m, and the length of the polyimide fiber is 1-2 mm.
The flame retardant is a modified flame retardant, and the specific modification method comprises the following steps: soaking the flame retardant in an ethanol aqueous solution (2%) of KH550, stirring for 1h at 50-60 ℃, and drying after suction filtration to obtain a product; the weight ratio of the flame retardant to the KH550 is 1: 24.
The foaming agent is formed by mixing hydrogen peroxide, hollow glass beads and dimethyl silicone oil according to the weight ratio of 2:1: 0.28.
Example 5
A coal mine composite colloid fire prevention and extinguishing material is prepared from the following raw materials in parts by weight: 2 parts of sodium carboxymethylcellulose, 1 part of agar, 15 parts of fly ash, 0.2 part of polyacrylamide, 8 parts of a cross-linking agent, 2 parts of sodium bicarbonate, 4 parts of a flame retardant, 5 parts of a foaming agent and 100 parts of water.
Wherein the cross-linking agent is a montmorillonite-loaded metal ion cross-linking agent.
The cross-linking agent is prepared by the following steps:
1) slowly dripping sodium hydroxide solution into the aluminum chloride solution, quickly heating until the solution is boiled after dripping, and cooling after 30min to obtain aluminum hydroxide;
2) adding montmorillonite into aluminum hydroxide, stirring and mixing at 80 deg.C for 60-70min, vacuum filtering, and drying to obtain product;
the molar ratio of sodium hydroxide to aluminum chloride is 2:1, the solution concentration is 0.2mol/L, the weight ratio of montmorillonite to aluminum chloride is 0.1 mol: 20 g.
The flame retardant is formed by mixing ammonium polyphosphate, magnesium oxide fiber and polyurethane fiber according to the weight ratio of 2:1:1, wherein the diameter of the brucite fiber is 2-6 mu m, the length of the brucite fiber is 800-1000 mu m, and the length of the polyimide fiber is 1-2 mm.
The flame retardant is a modified flame retardant, and the specific modification method comprises the following steps: soaking the flame retardant in an ethanol aqueous solution (2%) of KH550, stirring for 1h at 50-60 ℃, and drying after suction filtration to obtain a product; the weight ratio of the flame retardant to the KH550 is 1: 25.
The foaming agent is formed by mixing hydrogen peroxide, hollow glass beads and dimethyl silicone oil according to the weight ratio of 2:1: 0.3.
Comparative example 1
Comparative example 1 is a comparative example to example 5, differing from example 5 in that the flame retardant is ammonium polyphosphate.
Performance detection
The gel time, inhibition performance, thermal stability and compressive strength of the fire prevention and extinguishing material prepared in the embodiments 1-5 of the application are detected; wherein the inhibition performance refers to MT/T700 and 1997 universal technical conditions of the inhibitor for coal mine fire prevention for testing the inhibition rate at the coal temperature of 100 ℃; compression strength test the material was prepared into 70 x 70mm test specimens, cured for 6h and tested for compression strength.
The thermal stability of the fire prevention and extinguishing material in example 4 was tested by the following specific method: 100g of gel and the same mass of water are respectively placed in a constant-temperature drying oven to be heated at a constant speed, the heating range is 100-190 ℃, and the weight loss rate is respectively detected.
TABLE 1 Performance test data
| Resistance to chemical change | Compressive strength (MPa) | |
| Example 1 | 74.2 | 0.432 |
| Example 2 | 74.6 | 0.441 |
| Example 3 | 75.1 | 0.458 |
| Example 4 | 75.5 | 0.471 |
| Example 5 | 76.3 | 0.476 |
| Comparative example 1 | 70.1 | 0.320 |
TABLE 2 thermal stability testing of fire protection and extinguishing materials
| Temperature (. degree.C.) | 100 | 120 | 150 | 170 | 190 |
| Water loss rate (%) of composite colloid | 17.65 | 20.50 | 23.14 | 32.50 | 42.35 |
| Water loss (%) | 28.04 | 31.20 | 43.15 | 57.41 | 76.24 |
5mL of the product prepared in examples 1-5 of this application were poured into the funnel every 5min, and the time for the mixed solution to flow through the funnel was observed and recorded; when the time for flowing through the funnel exceeds 50% of the last time, and the surface of the mixed solution has no free water, the mixed solution can be judged to be gelatinized, and the gel time of the product is 12-14 min.
As can be seen from Table 1, the compound colloid has a resistance rate of more than 74% at 100 ℃, which shows that the material has excellent resistance performance and the compressive strength of the colloid is relatively high; however, compared with the data of comparative example 1, after the flame retardant is completely replaced by ammonium polyphosphate, the inhibition performance is reduced, and the strength is reduced, which shows that the brucite fiber and the polyimide fiber can enhance the mechanical property and have the synergistic flame retardant effect.
As can be seen from table 2, at the in-process that the temperature rose, compound colloid and water loss rate are all very big, but along with the rising of temperature, compound colloid loss rate is less than water far away, demonstrates that the compound colloid high temperature water retention nature of this application preparation is good to ensure to prevent putting out a fire the in-process, the colloid membrane is difficult for breaking, and it is effectual to separate oxygen.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. The coal mine composite colloid fire prevention and extinguishing material is characterized in that: the feed is prepared from the following raw materials in parts by weight: 1-2 parts of sodium carboxymethylcellulose, 1-2 parts of agar, 12-15 parts of fly ash, 0.1-0.2 part of polyacrylamide, 3-5 parts of cross-linking agent, 1-2 parts of sodium bicarbonate, 3-4 parts of flame retardant, 3-5 parts of foaming agent and 90-100 parts of water.
2. The coal mine composite colloid fire prevention and extinguishing material according to claim 1, characterized in that: the cross-linking agent is a montmorillonite-loaded metal ion cross-linking agent.
3. The coal mine composite colloid fire prevention and extinguishing material according to claim 2, characterized in that: the cross-linking agent is prepared by the following steps:
1) slowly dripping sodium hydroxide solution into the aluminum chloride solution, quickly heating until the solution is boiled after dripping, and cooling after 30min to obtain aluminum hydroxide;
2) adding montmorillonite into aluminum hydroxide, stirring and mixing at 70-80 deg.C for 60-70min, vacuum filtering, and drying to obtain product;
the molar ratio of the sodium hydroxide to the aluminum chloride is 2:1, the weight ratio of the montmorillonite to the aluminum chloride is 0.1 mol: 15-20 g.
4. The coal mine composite colloid fire prevention and extinguishing material according to claim 1, characterized in that: the flame retardant is formed by mixing ammonium polyphosphate, magnesium oxide fibers and polyurethane fibers according to the weight ratio of 1-2:1: 1.
5. The coal mine composite colloid fire prevention and extinguishing material according to claim 4, characterized in that: the flame retardant is a modified flame retardant, and the specific modification method comprises the following steps: soaking the flame retardant in an ethanol aqueous solution of KH550, stirring for 1h at 50-60 ℃, and drying after suction filtration to obtain a product; the weight ratio of the flame retardant to the KH550 is 1: 20-25.
6. The coal mine composite colloid fire prevention and extinguishing material according to claim 1, characterized in that: the foaming agent is formed by mixing hydrogen peroxide, hollow glass beads and dimethyl silicone oil according to the weight ratio of 2:1: 0.2-0.3.
7. A method for preparing the coal mine composite colloid fire prevention and extinguishing material according to claim 1, which is characterized in that: the method comprises the following steps:
(1) mixing sodium carboxymethylcellulose, agar and one third of water, and stirring;
(2) uniformly mixing and stirring the fly ash, the polyacrylamide, the cross-linking agent, the flame retardant and one third of water;
(3) and (3) mixing the mixture obtained in the step (1) and the step (2) and the rest components, and uniformly stirring to obtain the product.
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Effective date of registration: 20230616 Address after: 456400 north of middle section of Dashan Road, Huaxian New District, Anyang City, Henan Province Patentee after: HENAN ZHONGMEI MINING SCIENCE AND TECHNOLOGY DEVELOPMENT CO.,LTD. Address before: 401326 No.1, North South Avenue, Binjiang New Town, Jiangjin District, Chongqing Patentee before: CHONGQING VOCATIONAL INSTITUTE OF ENGINEERING |