Gas explosion suppression material for mine and preparation method thereof
By using a zeolite system consisting of clinoptilolite and mordenite and a hydroxybenzohydrazide compound, the problem of poor dispersibility of gas explosion suppression materials used in mines was solved, a more efficient gas explosion suppression effect was achieved, and explosion intensity and flame spread were reduced.
Patent Information
- Application Number
- CN202510881310.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2025-10-10
AI Technical Summary
In the prior art, when powder materials are used in mines, the dispersion of gas explosion suppression materials for mines is poor, resulting in poor explosion suppression effects.
Zeolite composed of clinoptilolite and mordenite in a specific ratio is combined with hydroxybenzohydrazide compounds to form a high-efficiency adsorption and dispersion system. By adsorbing methane, the gas concentration is reduced and the flame propagation path is blocked, thereby enhancing the explosion suppression performance.
The explosion suppression performance of gas explosion suppression materials used in mines is improved, the explosion intensity and flame propagation speed are reduced, and the hazards of accidents are reduced.
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of explosion suppression materials, and in particular to a gas explosion suppression material for mines and a preparation method thereof. Background Art
[0002] Mine gas poses a significant threat to coal mine safety, and gas explosions often result in devastating casualties and enormous economic losses. Mine gas explosion suppression materials are specialized materials designed to prevent or mitigate gas explosions. Their primary function is to physically inert combustible gases and oxygen concentrations, cool or absorb heat in the explosion zone, isolate heat transfer, and eliminate key free radicals such as H, O, and OH produced by methane explosion side chain reactions. Once gas explosion signs appear in a mine, the suppression materials quickly take effect, reducing the explosion's intensity and scope, thereby minimizing the resulting damage.
[0003] Common gas explosion suppression materials include inert gases (such as N2, CO2), water mist, powders, and multiphase composite explosion suppression materials. Among them, powder materials have become a research hotspot due to their portability and easy storage. However, powder explosion suppressants still have the problem of poor dispersibility, resulting in poor explosion suppression effect.
[0004] Therefore, it is necessary to develop a gas explosion suppression material for mines with high explosion suppression performance. Summary of the Invention
[0005] The present invention provides a gas explosion suppression material for mines and a preparation method thereof, which solves the problem of insufficient explosion suppression performance of gas explosion suppression materials for mines in the related art.
[0006] The technical solution of the present invention is as follows: The present invention proposes a gas explosion suppression material for mines, comprising the following component raw materials in parts by weight: 3 to 5 parts of sodium bicarbonate, 2 to 3 parts of attapulgite, 1 to 2 parts of talc, 2 to 3 parts of silicon dioxide, 1 to 2 parts of mica powder, 2 to 3 parts of zeolite, and 40 to 50 parts of ammonium polyphosphate, wherein the zeolite is composed of clinoptilolite and mordenite.
[0007] As a further technical solution, the mass ratio of the clinoptilolite to the mordenite is 1:1.3-1.5.
[0008] In the mine gas explosion suppression material of the present invention, the zeolite is composed of clinoptilolite and mordenite in a mass ratio of 1:1.3~1.5. Clinoptilolite has a rich pore structure and a large specific surface area, and has good adsorption performance for components such as methane in gas. When gas leaks and diffuses in a mine, clinoptilolite can quickly adsorb methane molecules, reduce the concentration of gas in the mine space, and make it difficult to reach the explosion limit. Mordenite has high thermal stability. In the high temperature environment generated by the gas explosion, mordenite can maintain the integrity of the structure, effectively absorb and disperse the heat generated by the explosion, and reduce the intensity of the explosion; when the mass ratio of the two is 1:1.3~1.5, a more efficient adsorption system is formed, and the pore network structure formed at the same time can more effectively cut off the flame propagation path, reduce the flame propagation speed, and further improve the explosion suppression performance of the mine gas explosion suppression material.
[0009] As a further technical solution, the clinoptilolite has a silica content of 69 wt% and a density of 1.28 g / cm 3 , the average particle size is 325 mesh.
[0010] As a further technical solution, the silicon-aluminum ratio of the mordenite is 20-40, and the grain size is 0.1-0.2 μm.
[0011] As a further technical solution, the raw materials further include 2 to 3 parts of a hydroxybenzohydrazide compound.
[0012] The raw materials in the gas explosion suppression material for mines of the present invention also include a hydroxybenzohydrazide compound. The hydroxybenzohydrazide compound has a certain surface activity, can improve the dispersibility of the various components in the explosion suppression material, can reduce the surface tension between the raw material particles, and enable raw materials such as sodium bicarbonate, attapulgite, and talc to be more evenly dispersed to form a more stable composite material. At the same time, the addition of the hydroxybenzohydrazide compound can also improve the thermal stability of the explosion suppression material, thereby further improving the explosion suppression performance of the gas explosion suppression material for mines.
[0013] As a further technical solution, the hydroxybenzohydrazide compound includes one or more of 4-hydroxybenzohydrazide, 3,4-dihydroxybenzohydrazide, and 3,4,5-trihydroxybenzohydrazide.
[0014] As a further technical solution, the hydroxybenzohydrazide compound is preferably 3,4-dihydroxybenzohydrazide.
[0015] As a further technical solution, the average particle size of the sodium bicarbonate is 100 mesh, the average particle size of the talc powder is 3000 mesh, the average particle size of the silicon dioxide is 3000 mesh, and the average particle size of the mica powder is 325 mesh.
[0016] The average particle size of the sodium bicarbonate in the gas explosion suppression material for mines of the present invention is 100 mesh. The 100-mesh sodium bicarbonate particle size is moderate and can be quickly and evenly dispersed in the gas environment in the complex operating environment of the mine. When the gas concentration reaches a dangerous threshold, its larger particle size ensures that when it comes into contact with a heat source or a fire source, it can decompose and release carbon dioxide and water at a suitable reaction rate, effectively diluting the combustible gas concentration and reducing the oxygen content, thereby suppressing the occurrence of an explosion reaction. At the same time, when sodium bicarbonate with this particle size is mixed with other raw materials such as attapulgite and ammonium polyphosphate, it will not agglomerate due to being too fine, nor will it affect the overall mixing uniformity due to being too coarse, thereby ensuring the comprehensive performance of the explosion suppression material.
[0017] The average particle size of the talc powder and silicon dioxide in the mine gas explosion suppression material of the present invention is 3000 mesh. The talc powder and silicon dioxide of 3000 mesh both have extremely high fineness and specific surface area, can effectively buffer and disperse energy, and weaken the power of explosion.
[0018] The average particle size of the mica powder in the gas explosion suppression material for mines of the present invention is 325 mesh. The special flaky structure of the mica powder can effectively block the spread of flames when an explosion occurs, and build a physical barrier between the gas and the flame. The 325-mesh mica powder particle size enables it to provide good physical barrier properties in the explosion suppression material while ensuring a certain degree of dispersibility, thereby promoting the stable performance of the explosion suppression material.
[0019] As a further technical solution, the average particle size of the attapulgite is 325 mesh and the density is 2.05 g / cm 3 , Mohs hardness is 2~3.
[0020] The density of the attapulgite in the mine gas explosion suppression material of the present invention is 2.05g / cm 3 When spraying or releasing explosion-suppressing materials in mine tunnels, this density can ensure that the attapulgite and other raw materials are suspended in the air together to form a stable explosion-suppressing cloud. It will not settle quickly due to excessive density, nor will it easily disperse due to too low density. When a gas explosion produces a shock wave, the attapulgite with a suitable density can interact with the shock wave in the cloud, weakening the destructive power of the shock wave, thereby reducing the damage of the explosion to mine facilities and personnel.
[0021] The present invention also provides a method for preparing a gas explosion suppression material for mines, which comprises the following steps: S1, dissolving sodium bicarbonate in water to obtain a sodium bicarbonate aqueous solution; S2. Dispersing the components of the remaining raw materials except ammonium polyphosphate in anhydrous ethanol, adding a sodium bicarbonate aqueous solution, mixing and drying to obtain a mixed powder; S3, mixing the mixed powder and ammonium polyphosphate, and grinding to obtain the gas explosion suppression material for mine.
[0022] As a further technical solution, in step S2, the mass ratio of the anhydrous ethanol to the ammonium polyphosphate is 3-8:1, for example, it can be 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, and preferably 5:1.
[0023] As a further technical solution, in step S2, the mixing time is 2-5h, for example, it can be 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 5h, and preferably 3h.
[0024] The working principle and beneficial effects of the present application are as follows: The zeolite in the gas explosion suppression material for mine is composed of clinoptilolite and mordenite, which synergistically improves the explosion suppression performance of the gas explosion suppression material for mine. Unlike the conventional way of adding zeolite as a raw material in the prior art, the present application focuses more on the outstanding effects brought by different types of zeolite. In the present application, the zeolite is composed of clinoptilolite and mordenite. Clinoptilolite preferentially adsorbs gas, reduces the concentration of gas, and provides more favorable conditions for mordenite to play a heat stability and free radical adsorption role. Mordenite plays a key role in high temperature and free radical control. The two synergistically further enhance the explosion suppression performance of the gas explosion suppression material for mine. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor also fall within the scope of protection of the present application.
[0026] In the following examples and comparative examples: Sodium bicarbonate: average particle size 100 mesh; Attapulgite: average particle size 325 mesh, density 2.05 g / cm 3 Mohs hardness 2-3; Talc powder: average particle size 3000 mesh; Silicon dioxide: average particle size 3000 mesh; Mica powder: average particle size 325 mesh; Ammonium polyphosphate: average particle size 5-18 μm; Clinoptilolite: silicon dioxide content 69 wt%, density 1.28 g / cm 3 , average particle size 325 mesh; Mordenite: The silicon-aluminum ratio is 20~40, and the grain size is 0.1~0.2μm.
[0027] Example 1 A method for preparing a gas explosion suppression material for mines comprises the following steps: S1, 3 parts of sodium bicarbonate were dissolved in water to obtain a sodium bicarbonate aqueous solution with a concentration of 8wt%; S2, dispersing 2 parts of attapulgite, 1 part of talc, 2 parts of silicon dioxide, 1 part of mica powder, and 2 parts of zeolite in 150 parts of anhydrous ethanol, adding an 8 wt% aqueous sodium bicarbonate solution, mixing for 3 hours and then drying to obtain a mixed powder; wherein the zeolite is composed of clinoptilolite and mordenite in a mass ratio of 1:1.3; S3. Mix the mixed powder and 40 parts of ammonium polyphosphate, grind at 200 r / min for 60 minutes to obtain the gas explosion suppression material for mines.
[0028] Example 2 A method for preparing a gas explosion suppression material for mines comprises the following steps: S1, 4 parts of sodium bicarbonate were dissolved in water to obtain a sodium bicarbonate aqueous solution with a concentration of 9wt%; S2, dispersing 2.5 parts of attapulgite, 1.5 parts of talc, 2.5 parts of silicon dioxide, 1.5 parts of mica powder, and 2.5 parts of zeolite in 195 parts of anhydrous ethanol, adding 9 wt% aqueous sodium bicarbonate solution, mixing for 3 hours and then drying to obtain a mixed powder; wherein the zeolite is composed of clinoptilolite and mordenite in a mass ratio of 1:1.3; S3. Mix the mixed powder and 45 parts of ammonium polyphosphate, and grind them to obtain a gas explosion suppression material for mines.
[0029] Example 3 A method for preparing a gas explosion suppression material for mines comprises the following steps: S1, 5 parts of sodium bicarbonate were dissolved in water to obtain a sodium bicarbonate aqueous solution with a concentration of 10wt%; S2, dispersing 3 parts of attapulgite, 2 parts of talc, 3 parts of silicon dioxide, 2 parts of mica powder, and 3 parts of zeolite in 225 parts of anhydrous ethanol, adding 10 wt% sodium bicarbonate aqueous solution, mixing for 3 hours and then drying to obtain a mixed powder; wherein the zeolite is composed of clinoptilolite and mordenite in a mass ratio of 1:1.3; S3. Mix the mixed powder and 50 parts of ammonium polyphosphate, grind at 200 r / min for 60 minutes to obtain the gas explosion suppression material for mines.
[0030] Example 4 Compared with Example 3, Example 4 is different in that the zeolite is composed of clinoptilolite and mordenite in a mass ratio of 1:1.5.
[0031] Example 5 A preparation method of a mine gas explosion suppression material, comprising the following steps: S1, 5 parts of sodium bicarbonate were dissolved in water to obtain a sodium bicarbonate aqueous solution with a concentration of 10wt%; S2, 3 parts of attapulgite, 2 parts of talcum powder, 3 parts of silicon dioxide, 2 parts of mica powder, 3 parts of zeolite, and 2 parts of 4-hydroxybenzhydrazide were dispersed in 225 parts of anhydrous ethanol, and the sodium bicarbonate aqueous solution with a concentration of 10wt% was added, mixed for 3h and dried to obtain a mixed powder; wherein the zeolite was composed of clinoptilolite and mordenite with a mass ratio of 1:1.3; S3, the mixed powder and 45 parts of ammonium polyphosphate were mixed, and ground at 200r / min for 60min to obtain the mine gas explosion suppression material.
[0032] Example 6 Compared with Example 5, the difference of Example 6 is that 4-hydroxybenzhydrazide is replaced by an equal amount of 3,4-dihydroxybenzhydrazide.
[0033] Example 7 Compared with Example 5, the difference of Example 7 is that 4-hydroxybenzhydrazide is replaced by an equal amount of 3,4,5-trihydroxybenzhydrazide.
[0034] Example 8 Compared with Example 6, the difference of Example 8 is that the amount of 3,4-dihydroxybenzhydrazide added is 3 parts.
[0035] Comparative Example 1 Compared with Example 3, the difference of Comparative Example 1 is that the zeolite is only clinoptilolite.
[0036] Comparative Example 2 Compared with Example 3, the difference of Comparative Example 2 is that the zeolite is only mordenite.
[0037] Experimental Example 1 The mine gas explosion suppression materials prepared in Examples 1-8 and Comparative Examples 1-2 were tested for explosion pressure value, the test gas was 7.5% methane-air, and the addition concentration of the mine gas explosion suppression material was 0.1g / L.
[0038] The test results are shown in Table 1: Table 1 Performance test results of the mine gas explosion suppression materials prepared in Examples 1-8 and Comparative Examples 1-2
[0039] As shown in Table 1, when the zeolite is composed of clinoptilolite and mordenite, and the hydroxybenzoyl hydrazine compound is added in the raw material, the explosion suppression performance of the gas explosion suppression material for mine can be improved.
[0040] The above only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A gas explosion suppression material for mines, characterized in that: The invention comprises the following raw materials in parts by weight: 3-5 parts of sodium bicarbonate, 2-3 parts of attapulgite, 1-2 parts of talc, 2-3 parts of silicon dioxide, 1-2 parts of mica powder, 2-3 parts of zeolite and 40-50 parts of ammonium polyphosphate, wherein the zeolite consists of clinoptilolite and mordenite.
2. A gas explosion suppression material for mines according to claim 1, characterized in that: The mass ratio of the clinoptilolite to the mordenite is 1:1.3-1.
5.
3. A gas explosion suppression material for mines according to claim 1, characterized in that: The silica content of the clinoptilolite is 69 wt % and the density is 1.28 g / cm 3 , the average particle size is 325 mesh.
4. A gas explosion suppression material for mines according to claim 1, characterized in that: The silicon-aluminum ratio of the mordenite is 20-40, and the grain size is 0.1-0.2 μm.
5. The gas explosion suppression material for mines according to claim 1, characterized in that: The raw materials also include 2 to 3 parts of hydroxybenzohydrazide compound.
6. A gas explosion suppression material for mines according to claim 5, characterized in that: The hydroxybenzohydrazide compound includes one or more of 4-hydroxybenzohydrazide, 3,4-dihydroxybenzohydrazide and 3,4,5-trihydroxybenzohydrazide.
7. The gas explosion suppression material for mines according to claim 1, characterized in that: The average particle size of the sodium bicarbonate is 100 mesh, the average particle size of the talc is 3000 mesh, the average particle size of the silicon dioxide is 3000 mesh, and the average particle size of the mica powder is 325 mesh.
8. The gas explosion suppression material for mines according to claim 1, characterized in that: The average particle size of the attapulgite is 325 mesh and the density is 2.05 g / cm 3 , Mohs hardness is 2~3.
9. A method for preparing a gas explosion suppression material for mines, for preparing a gas explosion suppression material for mines according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, dissolving sodium bicarbonate in water to obtain a sodium bicarbonate aqueous solution; S2. Dispersing the components of the remaining raw materials except ammonium polyphosphate in anhydrous ethanol, adding a sodium bicarbonate aqueous solution, mixing and drying to obtain a mixed powder; S3. Mix the mixed powder and ammonium polyphosphate, and grind them to obtain gas explosion suppression material for mines.
10. The method for preparing a gas explosion suppression material for mines according to claim 9, characterized in that: In step S1, the concentration of the sodium bicarbonate aqueous solution is 8 wt% to 10 wt%.