Coal mine exploitation anti-spraying, high consolidation type dust suppressant and preparation method thereof

Abstract

The application discloses a kind of coal mine exploitation with high consolidation type dust suppressant of anti-spraying, it is related to coal mine spray dust suppression technical field, preparation raw materials include: tamarind gum 5~7 parts, 2~3 parts of p-benzenediol boronic acid, polyacrylamide 4~6 parts, 2~3 parts of glutaraldehyde, fatty alcohol polyoxyethylene ether sodium sulfate 5~10 parts, glycerol 3~5 parts.The beneficial effects of the application are that by introducing p-benzenediol boronic acid, the hydroxyl groups on tamarind gum and the boronic acid groups are dehydrated and condensed to form borate ester bonds, forming a dynamic crosslinking structure, so that the water sensitivity of the material itself is improved;The dynamic crosslinking of borate ester bond makes there be a certain free hydroxyl group on modified product I all the time, another aldehyde group on glutaraldehyde reacts with the hydroxyl group of modified product I to form a more stable crosslinking structure, and glutaraldehyde crosslinks polyacrylamide and modified product I, so that the film-forming property, tensile resistance, water retention and the like of modified product II are further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coal mine spray dust suppression technology, and particularly relates to an anti-spraying and high-consolidation dust suppressant for coal mining and a preparation method thereof. BACKGROUND

[0002] In the process of coal mining, a large amount of dust particles generated will cause a series of adverse effects. It not only reduces the visibility of the workplace, increases the wear and tear of precision instruments and equipment, but also causes irreversible harm to the health of miners. In addition, during the process of coal dust deposition, the disturbance of air flow may cause secondary dust raising and other problems. At present, in order to prevent safety hazards caused by coal dust and effectively reduce its concentration, common means include spray dust suppression, chemical dust removal and other dust removal measures.

[0003] Due to the hydrophobicity of coal dust, the traditional spray dust suppression method has poor wetting effect on coal molecules by water mist alone. In addition, respirable dust is more difficult to be adsorbed and wetted by spray droplets due to its small particle size, so that the dust suppression effect is difficult to achieve the ideal state. The chemical dust suppression technology has obvious inhibition effect on coal dust through wetting and bonding, and can avoid the problem of frequent spraying. However, in the actual application of coal mine, there are often a lot of spraying and strong air flow environment, which leads to the technical defects of poor wind erosion resistance of dust suppressant, non-consolidation after spraying and the like. These problems not only cause adverse effects on the environment, but also seriously restrict the wide application of chemical dust suppressant.

[0004] Therefore, it is urgent to develop a high-efficiency dust suppressant with good dust suppression and anti-spraying effect to solve this problem. SUMMARY

[0005] To solve the above technical problems, the present application discloses an anti-spraying and high-consolidation dust suppressant for coal mining and a preparation method thereof. The jambu gum reacts with p-benzene diboronic acid to generate a modified product I. In the modification process of borate ester bond, the dynamic cross-linking borate ester bond is introduced to give the material self-repairing characteristics, improve the mechanical strength, thermal stability, erosion resistance and the like of the material. The modified product I and polyacrylamide are cross-linked with each other under the catalytic cross-linking of glutaraldehyde to form a more stable network structure, and improve the mechanical properties and film-forming properties of the material.

[0006] To achieve the above purpose, the present application adopts the following technical scheme:

[0007] An anti-spraying and high-consolidation dust suppressant for coal mining, the selected raw materials are calculated according to the weight percentage ratio, including:

[0008] Jambu gum 5-7 parts;

[0009] P-benzene diboronic acid 2-3 parts;

[0010] Polyacrylamide 4-6 parts;

[0011] Glutaraldehyde 2-3 parts;

[0012] Fatty alcohol polyoxyethylene ether sodium sulfate 5-10 parts;

[0013] Glycerol 3-5 parts;

[0014] The balance is distilled water.

[0015] Further, the mass concentration of the selected glutaraldehyde is 5%.

[0016] The application also discloses a preparation method of the anti-spraying and high-solidification dust suppressant for coal mining.

[0017] S1, distilled water is added in a beaker, the water bath temperature is set to 70 DEG C, a certain amount of tamarind gum is dissolved in the water, and the tamarind gum aqueous solution is obtained by water bath stirring until dissolution;

[0018] S2, a certain amount of p-benzene diboronic acid is added into the tamarind gum aqueous solution and placed in a magnetic stirring constant temperature water bath, 60 DEG C constant temperature water bath stirring reaction is carried out for 2h, and the modified solution I is obtained;

[0019] S3, the temperature of the water bath is reduced to 30 DEG C, a certain amount of polyacrylamide is added into the modified solution I, and the stirring reaction is continuously carried out for 3h, and the mixed solution II is obtained;

[0020] S4, a certain amount of glacial acetic acid is added into the modified solution II to adjust the solution to be acidic, a certain amount of glutaraldehyde is added, the temperature of the water bath is increased to 60 DEG C, and the water bath stirring reaction is carried out for 1h, and the modified solution III is obtained;

[0021] S5, the temperature of the water bath is reduced to 30 DEG C, and a certain amount of sodium hydroxide is added to adjust the pH value of the modified solution III to neutral;

[0022] S6, a certain amount of fatty alcohol polyoxyethylene ether sodium sulfate and glycerol are added into the modified solution III, and the stirring is carried out at room temperature until dissolution, and the anti-spraying and high-solidification dust suppressant is obtained.

[0023] Further, the raw materials are selected according to the weight percentage ratio, and the weight percentage ratio is as follows.

[0024] Tamarind gum: p-benzene diboronic acid: polyacrylamide: glutaraldehyde: fatty alcohol polyoxyethylene ether sodium sulfate: glycerol = 3:1:3:1:4:3.

[0025] Further, in the preparation process, the weight of each raw material is as follows when the total amount of 200ml distilled water is 200ml.

[0026] Tamarind gum 0.6g;

[0027] p-Phenylenediamine 0.2g;

[0028] Polyacrylamide 0.6g;

[0029] Glutaraldehyde 0.2g;

[0030] Fatty alcohol polyoxyethylene ether sodium sulfate 0.8g;

[0031] Glycerol 0.6g.

[0032] Further, the reaction equation of the reaction between tamarind gum and p-phenylenediamine to generate modified product I during the reaction is as follows:

[0033] (1)

[0034] In the reaction equation, the modification process of tamarind gum and p-phenylenediamine to generate borate ester bond improves the mechanical strength, thermal stability, and erosion resistance of the material by introducing dynamic cross-linking borate ester bond.

[0035] The reaction equation of the reaction between modified product I and polyacrylamide and glutaraldehyde to generate modified product II is as follows:

[0036] (2)

[0037] The reaction equation is the chemical cross-linking between modified product I and polyacrylamide under the catalytic cross-linking of glutaraldehyde, which further forms a more stable network structure and improves the mechanical properties and film-forming properties of the material.

[0038] During the preparation of the anti-spraying and high-solidification dust suppressant, the selected raw materials have the following characteristics:

[0039] Tamarind gum is a natural thickening agent and stabilizer widely used in the food industry, with good water retention, thickening, and emulsifying properties. Due to its excellent adhesion and water retention properties, tamarind gum has potential application value in dust suppression, and can form a dense protective film on the surface of coal samples, effectively preventing secondary dusting.

[0040] p-Phenylenediamine is commonly used in the preparation and derivatization of drug molecules and biological hormones. Due to its ability to dehydrate and condense with the hydroxyl groups of polymers under mild and catalyst-free conditions to form dynamic cross-linking borate ester bonds, it can improve the mechanical strength and thermal stability of polymers.

[0041] Polyacrylamide is a water-soluble polymer. Due to its excellent film-forming, water-retaining, and adhesive properties, it has unique advantages in the field of dust suppression. The amide groups on its own give it good modification properties.

[0042] Glutaraldehyde is an organic compound commonly used as a bactericide, food industry processing aid, disinfectant, tanning agent, wood preservative, pharmaceutical and polymer synthesis raw material, etc. Its aldehyde group can cross-link with hydroxyl and amide groups, thereby improving the mechanical properties and stability of the modified product.

[0043] Sodium fatty alcohol ether polyoxyethylene sulfate is an anionic surfactant with good wetting properties. Due to its excellent emulsifying, foaming, stable foaming, and moisturizing properties, it has excellent performance in dust suppression.

[0044] Glycerol is widely popular due to its excellent water retention ability. It can effectively attract surrounding water molecules and firmly lock them on the surface, forming a persistent moisturizing film. This film not only effectively prevents surface drying, but also maintains a certain degree of humidity, ensuring the comfort and health of the surface. In addition, glycerol also has the effect of improving the surface smoothness of the dust suppressant, which helps to reduce the phenomenon of dry cracking, thereby effectively preventing secondary dusting caused by dry cracking. This dual function makes glycerol very valuable in various applications, especially in environments that require moisture retention and dust prevention.

[0045] The beneficial effects of the present application are,

[0046] (1) The tamarind gum itself has a large number of hydroxyl groups, which makes it too water-sensitive. By introducing p-benzeneboronic acid, the hydroxyl groups on the tamarind gum are dehydrated and condensed with the boronic acid groups to form borate ester bonds, thereby forming a dynamic cross-linking structure. This improves the water sensitivity of the material itself. At the same time, due to the dynamic and reversible nature of the borate ester bond, the material is given special self-repairing properties, which improves the strength, thermal stability and other properties of the tamarind gum itself.

[0047] (2) Polyacrylamide itself has excellent mechanical properties and film-forming properties. The aldehyde groups on glutaraldehyde can be combined with modified product I one by one. Among them, the amide groups on polyacrylamide can chemically cross-link with the aldehyde groups on glutaraldehyde to form Schiff base structures, providing the possibility for the introduction of polyacrylamide. Due to the dynamic cross-linking of the borate ester bond, there are always some free hydroxyl groups on the modified product I. Another aldehyde group on glutaraldehyde can react with the hydroxyl groups on the modified product I to form a more stable cross-linking structure. Glutaraldehyde acts as a bridge between polyacrylamide and modified product I, cross-linking them together, which further improves the film-forming property, tensile resistance, and water retention of the modified product II. At the same time, due to the consumption of hydroxyl groups, the dust suppressant has the property of resisting rain, making the dust suppressant have strong stability in harsh environments.

[0048] (3) The raw materials selected in the present application are easily available, low-cost, biodegradable, and simple to prepare, making it easier for industrial production.

[0049] (4)The prepared anti-spraying and high-consolidation dust suppressant has excellent dust suppression performance and good wettability, can effectively adsorb coal dust particles, and can more efficiently capture fine coal dust in the air by combining the excellent adhesion of the dust suppressant, and by combining the film-forming performance of the dust suppressant to coat the dust particles, so that a solidified layer with hardness and wind erosion and rain erosion resistance is formed, thereby effectively preventing the secondary flying of coal dust. This feature makes the material have great application potential in the dust prevention field, and helps to improve air quality and reduce the influence of coal dust on the environment and human health.

[0050] In summary, the anti-spraying and high-consolidation dust suppressant prepared by the present application has good dust suppression, film-forming, wettability, adhesion, economy, degradation and other properties. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is a process flow diagram of the present application;

[0052] Figure 2 It is an anti-erosion test diagram of the present application. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0054] The present application discloses an anti-spraying and high-consolidation dust suppressant for coal mining, the selected raw materials are calculated according to weight percentage, including:

[0055] Tamarind gum 5-7 parts;

[0056] p-Phenylenediamine 2-3 parts;

[0057] Polyacrylamide 4-6 parts;

[0058] Glutaraldehyde 2-3 parts;

[0059] Sodium fatty alcohol polyoxyethylene ether sulfate 5-10 parts;

[0060] Glycerol 3-5 parts;

[0061] The balance is distilled water.

[0062] Example 1

[0063] A preparation method of a high-consolidation dust suppressant resistant to spraying for coal mining, a process flow thereof is shown in Figure 1 and specifically includes the following steps:

[0064] (1) distilled water is added to a beaker, the water bath temperature is set to 70°C, 0.1 g of tamarind gum is dissolved in 100 mL of water, and water bath stirring is performed until dissolution to obtain a tamarind gum aqueous solution;

[0065] (2) 0.05 g of p-benzeneboronic acid is added to the tamarind gum aqueous solution and placed in a magnetic stirring constant-temperature water bath kettle, 60°C constant-temperature water bath stirring is performed for 2 h, and a modified solution I is obtained;

[0066] (3) the water bath kettle temperature is reduced to 30°C, 0.1 g of polyacrylamide is added to the modified solution I, and stirring is continuously performed for 3 h to obtain a mixed solution II;

[0067] (4) a certain amount of glacial acetic acid is added to the modified solution II to adjust the solution to be acidic, 0.05 g of glutaraldehyde with a mass concentration of 5% is added, the water bath kettle temperature is increased to 60°C, and water bath stirring is performed for 1 h to obtain a modified solution III;

[0068] (5) the water bath kettle temperature is reduced to 30°C, and a certain amount of sodium hydroxide is added to adjust the pH value of the modified solution III to be neutral;

[0069] (6) 0.4 g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3 g of glycerol are added to the modified solution III, stirring is performed at room temperature until dissolution, and finally a dust suppressant resistant to spraying and high consolidation is obtained.

[0070] Example 2

[0071] A preparation method of a high-consolidation dust suppressant resistant to spraying for coal mining, specifically includes the following steps:

[0072] (1) distilled water is added to a beaker, the water bath temperature is set to 70°C, 0.1 g of tamarind gum is dissolved in 100 mL of water, and water bath stirring is performed until dissolution to obtain a tamarind gum aqueous solution;

[0073] (2) 0.1 g of p-benzeneboronic acid is added to the tamarind gum aqueous solution and placed in a magnetic stirring constant-temperature water bath kettle, 60°C constant-temperature water bath stirring is performed for 2 h, and a modified solution I is obtained;

[0074] (3) the water bath kettle temperature is reduced to 30°C, 0.2 g of polyacrylamide is added to the modified solution I, and stirring is continuously performed for 3 h to obtain a mixed solution II;

[0075] (4) After adding a certain amount of glacial acetic acid to modify solution II to make the solution acidic, 0.1 g of glutaraldehyde with a mass concentration of 5% is added, and the temperature of the water bath is raised to 60°C, and the solution is stirred in the water bath for 1 h to obtain modified solution III;

[0076] (5) The temperature of the water bath is reduced to 30°C, and a certain amount of sodium hydroxide is added to adjust the pH value of modified solution III to neutral;

[0077] (6) 0.4 g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3 g of glycerol are added to modified solution III, and the solution is stirred to dissolve at room temperature, and finally an anti-spraying and high-solidification dust suppressant is obtained.

[0078] Example 3

[0079] A preparation method of an anti-spraying and high-solidification dust suppressant for coal mining, specifically comprising the following steps:

[0080] (1) In a beaker, 0.1 g of tamarind gum is dissolved in 100 mL of distilled water, and the temperature of the water bath is set to 70°C, and the solution is stirred in the water bath until it is dissolved to obtain a tamarind gum aqueous solution;

[0081] (2) 0.15 g of p-benzeneboronic acid is added to the tamarind gum aqueous solution and placed in a magnetic stirring constant temperature water bath, and the solution is stirred in the water bath at 60°C for 2 h to obtain modified solution I;

[0082] (3) The temperature of the water bath is reduced to 30°C, 0.3 g of polyacrylamide is added to modified solution I, and the reaction is continued for 3 h to obtain mixed solution II;

[0083] (4) After adding a certain amount of glacial acetic acid to modify solution II to make the solution acidic, 0.15 g of glutaraldehyde with a mass concentration of 5% is added, and the temperature of the water bath is raised to 60°C, and the solution is stirred in the water bath for 1 h to obtain modified solution III;

[0084] (5) The temperature of the water bath is reduced to 30°C, and a certain amount of sodium hydroxide is added to adjust the pH value of modified solution III to neutral;

[0085] (6) 0.4 g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3 g of glycerol are added to modified solution III, and the solution is stirred to dissolve at room temperature, and finally an anti-spraying and high-solidification dust suppressant is obtained.

[0086] Example 4

[0087] A preparation method of an anti-spraying and high-solidification dust suppressant for coal mining, specifically comprising the following steps:

[0088] (1) In a beaker, add distilled water, set the water bath temperature to 70°C, dissolve 0.2g of tamarind gum in 100mL of water, and stir until dissolved in a water bath, to obtain a tamarind gum aqueous solution;

[0089] (2) Add 0.05g of p-benzene diboronic acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, 60°C constant temperature water bath stirring reaction 2h, to obtain modified solution I;

[0090] (3) Reduce the water bath temperature to 30°C, add 0.2g of polyacrylamide to the modified solution I, and continue to stir for 3h to obtain a mixed solution II;

[0091] (4) After adjusting the solution to be acidic by adding a certain amount of glacial acetic acid to the modified solution II, add 0.15g of 5% glutaraldehyde, and raise the water bath temperature to 60°C, and stir for 1h to obtain modified solution III;

[0092] (5) Reduce the water bath temperature to 30°C, and adjust the pH of the modified solution III to neutral by adding a certain amount of sodium hydroxide;

[0093] (6) Add 0.4g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3g of glycerol to the modified solution III, stir until dissolved at room temperature, and finally obtain an anti-spray, high-solidification type dust suppressant.

[0094] Example 5

[0095] A preparation method of an anti-spray, high-solidification type dust suppressant for coal mining, specifically comprising the following steps:

[0096] (1) In a beaker, add distilled water, set the water bath temperature to 70°C, dissolve 0.2g of tamarind gum in 100mL of water, and stir until dissolved in a water bath, to obtain a tamarind gum aqueous solution;

[0097] (2) Add 0.1g of p-benzene diboronic acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, 60°C constant temperature water bath stirring reaction 2h, to obtain modified solution I;

[0098] (3) Reduce the water bath temperature to 30°C, add 0.3g of polyacrylamide to the modified solution I, and continue to stir for 3h to obtain a mixed solution II;

[0099] (4) After adjusting the solution to be acidic by adding a certain amount of glacial acetic acid to the modified solution II, add 0.05g of 5% glutaraldehyde, and raise the water bath temperature to 60°C, and stir for 1h to obtain modified solution III;

[0100] (5) Reduce the water bath temperature to 30°C, and adjust the pH of the modified solution III to neutral by adding a certain amount of sodium hydroxide;

[0101] (6) To the modified solution III, 0.4 g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3 g of glycerol are added, and stirred at room temperature until dissolved, finally obtaining an anti-spraying, high-solidification type dust suppressant.

[0102] Example 6

[0103] A preparation method of an anti-spraying, high-solidification type dust suppressant for coal mining, specifically comprising the following steps:

[0104] (1) Distilled water is added to a beaker, the water bath temperature is set to 70°C, 0.2 g of tamarind gum is dissolved in 100 mL of water, and water bath stirring is performed until dissolved, obtaining a tamarind gum aqueous solution;

[0105] (2) 0.15 g of p-benzeneboronic acid is added to the tamarind gum aqueous solution and placed in a magnetic stirring constant temperature water bath kettle, 60°C constant temperature water bath stirring is performed for 2 h, obtaining a modified solution I;

[0106] (3) The water bath kettle temperature is reduced to 30°C, 0.1 g of polyacrylamide is added to the modified solution I, and stirring is continued for 3 h, obtaining a mixed solution II;

[0107] (4) After adding a certain amount of glacial acetic acid to adjust the solution to be acidic, 0.1 g of glutaraldehyde with a mass concentration of 5% is added, and the water bath kettle temperature is raised to 60°C, water bath stirring is performed for 1 h, obtaining a modified solution III;

[0108] (5) The water bath kettle temperature is reduced to 30°C, and a certain amount of sodium hydroxide is added to adjust the pH value of the modified solution III to neutral;

[0109] (6) To the modified solution III, 0.4 g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3 g of glycerol are added, and stirred at room temperature until dissolved, finally obtaining an anti-spraying, high-solidification type dust suppressant.

[0110] Example 7

[0111] A preparation method of an anti-spraying, high-solidification type dust suppressant for coal mining, specifically comprising the following steps:

[0112] (1) Distilled water is added to a beaker, the water bath temperature is set to 70°C, 0.2 g of tamarind gum is dissolved in 100 mL of water, and water bath stirring is performed until dissolved, obtaining a tamarind gum aqueous solution;

[0113] (2) 0.1 g of p-benzeneboronic acid is added to the tamarind gum aqueous solution and placed in a magnetic stirring constant temperature water bath kettle, 60°C constant temperature water bath stirring is performed for 2 h, obtaining a modified solution I;

[0114] (3) The temperature of the water bath is reduced to 30°C, 0.1 g of polyacrylamide is added to the modified solution I, and the stirring reaction is continued for 3 h to obtain mixed solution II;

[0115] (4) After adding a certain amount of glacial acetic acid to adjust the solution to be acidic, 0.15 g of glutaraldehyde with a mass concentration of 5% is added to the modified solution II, the temperature of the water bath is increased to 60°C, and the water bath stirring reaction is carried out for 1 h to obtain modified solution III;

[0116] (5) The temperature of the water bath is reduced to 30°C, and a certain amount of sodium hydroxide is added to adjust the pH value of the modified solution III to neutral;

[0117] (6) 0.4 g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3 g of glycerol are added to the modified solution III, and stirring is carried out at room temperature until dissolution, finally obtaining an anti-spraying and high-solidification type dust suppressant.

[0118] Example 8

[0119] A preparation method of an anti-spraying and high-solidification type dust suppressant for coal mining, specifically comprising the following steps:

[0120] (1) In a beaker, 0.3 g of tamarind gum is dissolved in 100 mL of distilled water, the water bath temperature is set to 70°C, and the water bath stirring is carried out until dissolution to obtain a tamarind gum aqueous solution;

[0121] (2) 0.1 g of p-benzene diboronic acid is added to the tamarind gum aqueous solution and placed in a magnetic stirring constant temperature water bath, the constant temperature water bath stirring reaction is carried out at 60°C for 2 h to obtain a modified solution I;

[0122] (3) The temperature of the water bath is reduced to 30°C, 0.1 g of polyacrylamide is added to the modified solution I, and the stirring reaction is continued for 3 h to obtain mixed solution II;

[0123] (4) After adding a certain amount of glacial acetic acid to adjust the solution to be acidic, 0.15 g of glutaraldehyde with a mass concentration of 5% is added to the modified solution II, the temperature of the water bath is increased to 60°C, and the water bath stirring reaction is carried out for 1 h to obtain modified solution III;

[0124] (5) The temperature of the water bath is reduced to 30°C, and a certain amount of sodium hydroxide is added to adjust the pH value of the modified solution III to neutral;

[0125] (6) 0.4 g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3 g of glycerol are added to the modified solution III, and stirring is carried out at room temperature until dissolution, finally obtaining an anti-spraying and high-solidification type dust suppressant.

[0126] Example 9

[0127] A preparation method of an anti-spraying and high-solidification type dust suppressant for coal mining, specifically comprising the following steps:

[0128] (1) In a beaker, add distilled water, set the water bath temperature to 70℃, dissolve 0.3g of tamarind gum in 100mL of water, and stir until dissolved in a water bath, to obtain a tamarind gum aqueous solution;

[0129] (2) Add 0.15g of p-benzene diboronic acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, 60℃ constant temperature water bath stirring reaction for 2h, to obtain modified solution I;

[0130] (3) Reduce the water bath temperature to 30℃, add 0.2g of polyacrylamide to the modified solution I, and continue to stir for 3h, to obtain mixed solution II;

[0131] (4) Add a certain amount of glacial acetic acid to the modified solution II to adjust the solution to be acidic, then add 0.05g of 5% glutaraldehyde, and raise the water bath temperature to 60℃, and stir for 1h, to obtain modified solution III;

[0132] (5) Reduce the water bath temperature to 30℃, and add a certain amount of sodium hydroxide to adjust the pH of the modified solution III to neutral;

[0133] (6) Add 0.4g of fatty alcohol polyoxyethylene ether sodium sulfate and 0.3g of glycerol to the modified solution III, and stir until dissolved at room temperature, to finally obtain an anti-spray, high-solidification type dust suppressant.

[0134] Comparative Example 1

[0135] Dissolve 0.1g of tamarind gum in 100mL of distilled water, and add 0.4g of fatty alcohol polyoxyethylene ether sodium sulfate to it, and stir until dissolved at room temperature, to obtain a dust suppression material of Comparative Example 1.

[0136] Comparative Example 2

[0137] Dissolve 0.1g of tamarind gum and 0.1g of polyacrylamide in 100mL of distilled water, and add 0.4g of fatty alcohol polyoxyethylene ether sodium sulfate to it, and stir until dissolved at room temperature, to obtain a dust suppression material of Comparative Example 2.

[0138] The various dust suppression materials prepared in Examples 1-9 and Comparative Examples 1-2 were subjected to wind erosion resistance testing and anti-spray testing.

[0139] The specific method for wind erosion resistance testing is as follows:

[0140] Each sample was placed in a simulated wind erosion environment test platform with a wind speed of 15 m / s, and a handheld laser particle counter (9306-V2) was used to detect the concentrations of PM2.5 and PM10, and record them as C0. Then a certain amount of dust suppressant or comparative material was uniformly sprayed on the same mass of coal powder, and after constant temperature drying at 50℃ for 48h, the samples were respectively placed in a simulated wind erosion environment test platform with a wind speed of 15 m / s, and the concentrations of PM2.5 and PM10 were measured again, and recorded as C1. Each data was measured for 3 times to take the average value, C1-C0 was compared with the initial concentration C0, and the corresponding dust suppression efficiency was calculated.

[0141] By Figure 2 It can be seen that the dust suppression efficiency of examples 1-9 for PM2.5 and PM10 is more than 92%, while that of comparative examples 1 and 2 is only about 60%, which indicates that the dust control effect of comparative examples 1 and 2 is poor, and the wind erosion resistance effect of examples 1-9 meets the basic expected effect.

[0142] The anti-spraying test method is as follows:

[0143] The sample was placed in a simulated spraying environment test platform, the spraying flow rate was 8.9 L / min, the spraying time was 1 min and 2 min respectively, the mass of the sample before spraying m0 and the mass after rain and drying m1 were recorded, and the anti-spraying efficiency of the sample was calculated by the following formula, and the results are shown in Table 1.

[0144]

[0145] In the formula, η is the anti-rain efficiency (%), m0 is the mass of the sample before rain (g), and m1 is the mass of the sample after rain and drying (g).

[0146] Table 1 Anti-spraying test

[0147]

[0148]

[0149] As shown in the above table, when the spraying time is 2 min, the dust holding rates of examples 1-9 are all more than 95%, while the dust holding rates of comparative examples 1 and 2 are only 35% and 42%, respectively. This is because the dust suppressant prepared by the present application can adhere to coal dust particles, adhere fine dust particles into a group, and form a layer of solid protective film on the surface of coal dust through the film forming property of the material itself, so as to prevent the loss of the underlying dust due to water spraying.

[0150] The anti-spraying and high-consolidation dust suppressant prepared by the method has excellent dust suppression and anti-spraying characteristics when sprayed on the surface of the coal pile. The dust suppressant can form a dense protective film on the surface of the coal dust, effectively preventing the flying of the coal dust and ensuring the stability of the surface of the coal pile. The film not only enhances the dust suppression effect, but also has good anti-spraying performance, providing more effective protection for the coal pile.

[0151] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present application should also be within the scope of the present application.

Claims

1. A method for preparing a dust suppressant with anti-spraying and high-consolidation properties for coal mining, characterized in that, Includes the following steps: S1. Add distilled water to a beaker, set the water bath temperature to 70°C, dissolve a certain amount of tamarind gum in the water, stir in the water bath until dissolved, and obtain an aqueous solution of tamarind gum. S2, a certain amount of terephthalic acid was added to the tamarind gum aqueous solution and placed in a magnetically stirred constant temperature water bath. The mixture was stirred and reacted at 60°C for 2 hours to obtain modified solution I. S3, lower the temperature of the water bath to 30℃, add a certain amount of polyacrylamide to the modified solution I, and continue stirring the reaction for 3 hours to obtain mixed solution II; S4. After adding a certain amount of glacial acetic acid to modified solution II to adjust the solution to acidity, a certain amount of glutaraldehyde was added, and the temperature of the water bath was raised to 60℃. The reaction was carried out by stirring in the water bath for 1 hour to obtain modified solution III. S5, lower the water bath temperature to 30℃ and add a certain amount of sodium hydroxide to adjust the pH of modified solution III to neutral; S6. Add a certain amount of sodium fatty alcohol polyoxyethylene ether sulfate and glycerin to modified solution III, stir at room temperature until dissolved, and an anti-spraying, high-consolidation dust suppressant can be obtained. During the preparation process, when the total volume of distilled water is 200ml, the weights of each raw material are as follows: Tamarind gum 0.6g; 0.2g of terephthalic acid; Polyacrylamide 0.6g; Glutaraldehyde 0.2g; Sodium fatty alcohol polyoxyethylene ether sulfate 0.8g; Glycerin 0.6g; The selected glutaraldehyde concentration was 5%.

2. The preparation method of a dust suppressant for coal mine operation with anti-spraying and high-consolidation properties as described in claim 1, characterized in that, The selected raw materials, by weight percentage, include: Tamarind gum: terephthalic acid: polyacrylamide: glutaraldehyde: fatty alcohol polyoxyethylene ether sodium sulfate: glycerol = 3:1:3:1:4:3.

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