Spray-resistant and high-consolidation dust suppressant for coal mining and preparation method of spray-resistant and high-consolidation dust suppressant

Abstract

The invention discloses an anti-spraying and high-consolidation dust suppressant for coal mining, and relates to the technical field of coal mine spraying dust suppression, and the anti-spraying and high-consolidation dust suppressant is prepared from the following raw materials: 5-7 parts of tamarind gum, 2-3 parts of p-phenylenediboric acid, 4-6 parts of polyacrylamide, 2-3 parts of glutaraldehyde, 5-10 parts of fatty alcohol polyoxyethylene ether sodium sulfate and 3-5 parts of glycerol. The preparation method has the beneficial effects that p-phenylenediboronic acid is introduced, so that a hydroxyl group on the tamarind gum and a boric acid group are subjected to dehydration condensation to form a boric acid ester bond, a dynamic cross-linked structure is formed, and the water sensitivity of the material is improved; certain free hydroxyl groups always exist on the modified product I due to dynamic cross-linking of boric acid ester bonds, another aldehyde group on glutaraldehyde and the hydroxyl groups of the modified product I are subjected to an aldolization reaction to form a more stable cross-linked structure, and polyacrylamide and the modified product I are cross-linked through glutaraldehyde. The film-forming property, the tensile resistance, the water-retaining property and the like of the modified product II are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine spray dust suppression, and particularly relates to an anti-spray and high-consolidation type dust suppressant for coal mine mining and a preparation method thereof. Background Art

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

[0003] Due to the hydrophobicity of coal dust itself, the traditional spray dust suppression method has a poor wetting effect on coal molecules by relying solely on water mist. In addition, respirable dust is more difficult to be adsorbed and wetted by spray droplets due to its smaller particle size, making it difficult to achieve an ideal dust suppression effect. Chemical dust suppression technology has an obvious inhibitory effect on coal dust through wetting and bonding, and can avoid the problem of frequent spraying. However, in the actual application of coal mines, there are often a large number of spraying and strong air flow environments, resulting in technical defects such as poor wind erosion resistance and non-consolidation after spraying of the dust suppressant. These problems not only have an adverse impact on the environment, but also seriously restrict the wide application of chemical dust suppressants.

[0004] Therefore, there is an urgent need to develop a highly efficient dust suppressant with both dust suppression properties and good anti-spray effect to solve this problem. Summary of the Invention

[0005] To solve the above technical problems, the present invention discloses an anti-spray and high-consolidation type dust suppressant for coal mine mining and a preparation method thereof. Tamarind gum reacts with terephthalic boric acid to form modified product Ⅰ. During the modification process of the borate bond, the introduction of a dynamic cross-linked borate bond endows the material with self-healing properties, improving the mechanical strength, thermal stability, anti-scouring performance, etc. of the material; modified product Ⅰ and polyacrylamide chemically cross-link with each other under the catalytic cross-linking of glutaraldehyde to form a more stable network structure, improving the mechanical properties and film-forming properties of the material.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An anti-spray and high-consolidation type dust suppressant for coal mine mining, the selected raw materials are calculated by weight percentage, including:

[0008] Tamarind gum 5 - 7 parts;

[0009] Terephthalic boric acid 2 - 3 parts;

[0010] 4 - 6 parts of polyacrylamide;

[0011] 2 - 3 parts of glutaraldehyde;

[0012] 5 - 10 parts of sodium lauryl polyoxyethylene ether sulfate;

[0013] 3 - 5 parts of glycerol;

[0014] The balance is distilled water.

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

[0016] The present invention also discloses a preparation method of an anti - spray and high - consolidation dust suppressant for coal mine mining, comprising the following steps:

[0017] S1, Add distilled water to a beaker, set the water bath temperature to 70°C, dissolve a certain amount of tamarind gum in water, and stir in the water bath until dissolved to obtain a tamarind gum aqueous solution;

[0018] S2, Add a certain amount of terephthalic boric acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, react at 60°C with constant temperature stirring for 2 h to obtain modified solution I;

[0019] S3, Lower the temperature of the water bath to 30°C, then add a certain amount of polyacrylamide to modified solution I, and continue stirring and reacting for 3 h to obtain mixed solution II;

[0020] S4, After adding a certain amount of glacial acetic acid to modified solution II to adjust the solution to be acidic, add a certain amount of glutaraldehyde, and raise the temperature of the water bath to 60°C, react with constant temperature stirring for 1 h to obtain modified solution III;

[0021] S5, Lower the temperature of the water bath to 30°C, and add a certain amount of sodium hydroxide to adjust the pH value of modified solution III to neutral;

[0022] S6, Add a certain amount of sodium lauryl polyoxyethylene ether sulfate and glycerol to modified solution III, stir at room temperature until dissolved, and then the anti - spray and high - consolidation dust suppressant can be obtained.

[0023] Furthermore, the selected raw materials are calculated by weight percentage, including,

[0024] Tamarind gum: terephthalic boric acid: polyacrylamide: glutaraldehyde: sodium lauryl polyoxyethylene ether sulfate: glycerol = 3:1:3:1:4:3.

[0025] Furthermore, during the preparation process, when the total amount of distilled water is 200 ml, the weights of each raw material are:

[0026] Tamarind gum 0.6 g;

[0027] 0.2 g of terephthalic diboronic acid;

[0028] 0.6 g of polyacrylamide;

[0029] 0.2 g of glutaraldehyde;

[0030] 0.8 g of sodium lauryl polyoxyethylene ether sulfate;

[0031] 0.6 g of glycerol.

[0032] Furthermore, during the reaction process, the reaction equation for the formation of modified product Ⅰ from tamarind gum and terephthalic diboronic acid is:

[0033] (1)

[0034] In this reaction equation, the modification process of forming borate bonds from tamarind gum and terephthalic diboronic acid endows the material with self-healing properties by introducing dynamic cross-linked borate bonds, and improves the mechanical strength, thermal stability, anti-scouring performance, etc. of the material.

[0035] The reaction equation for the formation of modified product Ⅱ from modified product Ⅰ, polyacrylamide and glutaraldehyde is:

[0036] (2)

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

[0038] In the preparation process of this anti-spray and high-consolidation dust suppressant, the selected raw materials have the following characteristics:

[0039] Tamarind gum is a natural thickener 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 the occurrence of secondary dust.

[0040] Terephthalic diboronic acid is commonly used in the preparation and derivatization of pharmaceutical molecules and biological hormones. Since it can dehydrate and condense with the hydroxyl groups of polymers to form dynamic cross-linked borate bonds under mild and catalyst-free conditions, it can improve the mechanical strength, thermal stability, etc. of polymers.

[0041] Polyacrylamide is a water-soluble polymer. Due to its excellent film-forming, water retention, and adhesion properties, it has unique advantages in the field of dust suppression. The amide groups it carries endow it with good modification characteristics.

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

[0043] Sodium lauryl polyoxyethylene ether sulfate is an anionic surfactant with good wetting properties. Due to its excellent emulsifying, foaming, foam stabilizing, and moisturizing properties, it has excellent performance in the field of dust suppression.

[0044] Glycerol is widely popular due to its excellent water retention ability. It can effectively attract surrounding water molecules and firmly lock these waters on the surface, thereby forming a persistent moisture retention 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 cracking phenomena, thereby effectively preventing secondary dust generation due to cracking. This dual function makes glycerol very valuable in a variety of applications, especially in environments where moisture needs to be maintained for dust prevention.

[0045] The beneficial effects of the present invention are as follows

[0046] (1) Tamarind gum itself has a large number of hydroxyl groups, making its water sensitivity too high. By introducing terephthalic boric acid, the hydroxyl groups on tamarind gum undergo dehydration condensation with boric acid groups to form borate bonds, thereby forming a dynamic cross-linked structure, improving the water sensitivity of the material itself. At the same time, due to the dynamic reversible characteristics of the borate bond, the material is endowed with special self-healing characteristics, and the strength, thermal stability, and other properties of tamarind gum itself are all improved to a certain extent.

[0047] (2) Polyacrylamide itself has excellent mechanical properties and film-forming properties. Through the aldehyde group carried by glutaraldehyde itself, it can be combined with modified product Ⅰ in pairs. Among them, polyacrylamide itself has an amide group that can undergo chemical cross-linking with the aldehyde group on glutaraldehyde to form a Schiff base structure, providing the possibility for the introduction of polyacrylamide. Due to the dynamic cross-linking of the borate bond, there are always a certain number of free hydroxyl groups on modified product Ⅰ, and the other aldehyde group on glutaraldehyde can undergo acetal reaction with the hydroxyl group of modified product Ⅰ to form a more stable cross-linked structure. Glutaraldehyde acts as a bridge between polyacrylamide and modified product Ⅰ to cross-link the two, further improving the film-forming property, tensile resistance, water retention, etc. of modified product Ⅱ; at the same time, due to the consumption of hydroxyl groups, the dust suppressant has the characteristics of anti-flushing, making the dust suppressant have strong stability in harsh environments.

[0048] (3) The raw materials selected in the present invention are easily available, low in cost, biodegradable, simple to prepare, and more suitable for industrial production.

[0049] (4) The prepared anti-spray and high-consolidation dust suppressant has excellent dust suppression performance and good wettability. It can effectively adsorb coal dust particles, and with its excellent adhesion, it can capture fine coal dust in the air more efficiently. By combining its film-forming performance to coat the dust particles, it forms a solidified layer that takes into account hardness and resistance to wind erosion and rain, thus effectively preventing the secondary flying of coal dust. This characteristic makes this material have great application potential in the field of dust prevention, helping to improve air quality and reduce the impact of coal dust on the environment and human health.

[0050] In summary, the anti-spray and high-consolidation dust suppressant prepared by the present invention has various properties such as good dust suppression, film-forming, wettability, adhesion, economy, and degradability. Description of the Drawings

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

[0052] Figure 2 It is a schematic diagram of the wind erosion test of the present invention. Detailed Embodiments

[0053] To make the purpose, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention.

[0054] The present invention discloses an anti-spray and high-consolidation dust suppressant for coal mine development. The selected raw materials are calculated by weight percentage and include:

[0055] Tamarind gum 5 - 7 parts;

[0056] p-Phenylenediboronic acid 2 - 3 parts;

[0057] Polyacrylamide 4 - 6 parts;

[0058] Glutaraldehyde 2 - 3 parts;

[0059] Sodium lauryl 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 an anti-spraying and highly consolidated dust suppressant for coal mine mining, the process flow is as Figure 1 shown, and specifically includes the following steps:

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

[0065] (2) Add 0.05 g of terephthalic diboric acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, and react with constant temperature stirring at 60 °C for 2 h to obtain modified solution I;

[0066] (3) Lower the temperature of the water bath to 30 °C, add 0.1 g of polyacrylamide to modified solution I, and continue to stir and react for 3 h to obtain mixed solution II;

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

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

[0069] (6) Add 0.4 g of sodium lauryl polyoxyethylene ether sulfate and 0.3 g of glycerol to modified solution III, and stir at room temperature until dissolved to finally obtain an anti-spraying and highly consolidated dust suppressant.

[0070] Example 2

[0071] A preparation method of an anti-spraying and highly consolidated dust suppressant for coal mine mining, specifically includes the following steps:

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

[0073] (2) Add 0.1 g of terephthalic diboric acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, and react with constant temperature stirring at 60 °C for 2 h to obtain modified solution I;

[0074] (3) Lower the temperature of the water bath to 30 °C, add 0.2 g of polyacrylamide to modified solution I, and continue to stir and react for 3 h to obtain mixed solution II;

[0075] (4) After adding a certain amount of glacial acetic acid to Modifying Solution II to adjust the solution to be acidic, add 0.1 g of glutaraldehyde with a mass concentration of 5%, and raise the temperature of the water bath to 60 °C. Stir and react in the water bath for 1 h to obtain Modifying Solution III;

[0076] (5) Lower the temperature of the water bath to 30 °C, and add a certain amount of sodium hydroxide to adjust the pH value of Modifying Solution III to neutral;

[0077] (6) Add 0.4 g of sodium lauryl polyoxyethylene ether sulfate and 0.3 g of glycerol to Modifying Solution III, and stir at room temperature until dissolved to finally obtain an anti-spray and high-consolidation dust suppressant.

[0078] Example 3

[0079] A preparation method of an anti-spray and high-consolidation dust suppressant for coal mine mining, specifically including the following steps:

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

[0081] (2) Add 0.15 g of terephthalic boric acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath. Stir and react at 60 °C in the water bath for 2 h to obtain Modifying Solution I;

[0082] (3) Lower the temperature of the water bath to 30 °C, add 0.3 g of polyacrylamide to Modifying Solution I, and continue to stir and react for 3 h to obtain Mixed Solution II;

[0083] (4) After adding a certain amount of glacial acetic acid to Modifying Solution II to adjust the solution to be acidic, add 0.15 g of glutaraldehyde with a mass concentration of 5%, and raise the temperature of the water bath to 60 °C. Stir and react in the water bath for 1 h to obtain Modifying Solution III;

[0084] (5) Lower the temperature of the water bath to 30 °C, and add a certain amount of sodium hydroxide to adjust the pH value of Modifying Solution III to neutral;

[0085] (6) Add 0.4 g of sodium lauryl polyoxyethylene ether sulfate and 0.3 g of glycerol to Modifying Solution III, and stir at room temperature until dissolved to finally obtain an anti-spray and high-consolidation dust suppressant.

[0086] Example 4

[0087] A preparation method of an anti-spray and high-consolidation dust suppressant for coal mine mining, specifically including the following steps:

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

[0089] (2) Add 0.05 g of terephthalic acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath. Stir and react at a constant temperature of 60 °C for 2 h to obtain modified solution I;

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

[0091] (4) After adding a certain amount of glacial acetic acid to modified solution II to adjust the solution to be acidic, add 0.15 g of glutaraldehyde with a mass concentration of 5%, and raise the temperature of the water bath to 60 °C. Stir and react in the water bath for 1 h to obtain modified solution III;

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

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

[0094] Example 5

[0095] A preparation method of an anti-spray and high-consolidation dust suppressant for coal mine development, specifically including the following steps:

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

[0097] (2) Add 0.1 g of terephthalic acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath. Stir and react at a constant temperature of 60 °C for 2 h to obtain modified solution I;

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

[0099] (4) After adding a certain amount of glacial acetic acid to modified solution II to adjust the solution to be acidic, add 0.05 g of glutaraldehyde with a mass concentration of 5%, and raise the temperature of the water bath to 60 °C. Stir and react in the water bath for 1 h to obtain modified solution III;

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

[0101] (6) Add 0.4 g of sodium lauryl polyoxyethylene ether sulfate and 0.3 g of glycerol to the modified solution III, and stir at room temperature until dissolved to finally obtain a dust suppressant with anti-spraying and high consolidation properties.

[0102] Example 6

[0103] A preparation method of a dust suppressant with anti-spraying and high consolidation properties for coal mine excavation, specifically including the following steps:

[0104] (1) Add distilled water to a beaker, set the water bath temperature to 70 °C, dissolve 0.2 g of tamarind gum in 100 mL of water, and stir in the water bath until dissolved to obtain a tamarind gum aqueous solution;

[0105] (2) Add 0.15 g of terephthalic acid boric acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, and stir and react at a constant temperature of 60 °C for 2 h to obtain the modified solution I;

[0106] (3) Lower the temperature of the water bath to 30 °C, add 0.1 g of polyacrylamide to the modified solution I, and continue to stir and react for 3 h to obtain the mixed solution II;

[0107] (4) After adding a certain amount of glacial acetic acid to the modified solution II to adjust the solution to be acidic, add 0.1 g of glutaraldehyde with a mass concentration of 5%, and raise the temperature of the water bath to 60 °C, and stir and react in the water bath for 1 h to obtain the modified solution III;

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

[0109] (6) Add 0.4 g of sodium lauryl polyoxyethylene ether sulfate and 0.3 g of glycerol to the modified solution III, and stir at room temperature until dissolved to finally obtain a dust suppressant with anti-spraying and high consolidation properties.

[0110] Example 7

[0111] A preparation method of a dust suppressant with anti-spraying and high consolidation properties for coal mine excavation, specifically including the following steps:

[0112] (1) Add distilled water to a beaker, set the water bath temperature to 70 °C, dissolve 0.2 g of tamarind gum in 100 mL of water, and stir in the water bath until dissolved to obtain a tamarind gum aqueous solution;

[0113] (2) Add 0.1 g of terephthalic acid boric acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, and stir and react at a constant temperature of 60 °C for 2 h to obtain the modified solution I;

[0114] (3) Lower the temperature of the water bath to 30°C, add 0.1 g of polyacrylamide to the modified solution I, and continue stirring and reacting for 3 h to obtain the mixed solution II;

[0115] (4) After adding a certain amount of glacial acetic acid to the modified solution II to adjust the solution to be acidic, add 0.15 g of glutaraldehyde with a mass concentration of 5%, raise the temperature of the water bath to 60°C, and stir and react in the water bath for 1 h to obtain the modified solution III;

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

[0117] (6) Add 0.4 g of sodium lauryl polyoxyethylene ether sulfate and 0.3 g of glycerol to the modified solution III, and stir at room temperature until dissolved to finally obtain the anti-spray and high-consolidation dust suppressant.

[0118] Example 8

[0119] A preparation method of an anti-spray and high-consolidation dust suppressant for coal mine development specifically includes the following steps:

[0120] (1) Add distilled water to a beaker, set the water bath temperature to 70°C, dissolve 0.3 g of tamarind gum in 100 mL of water, and stir in the water bath until dissolved to obtain the tamarind gum aqueous solution;

[0121] (2) Add 0.1 g of terephthalic boric acid to the tamarind gum aqueous solution and place it in a magnetic stirring constant temperature water bath, and stir and react at 60°C in the water bath for 2 h to obtain the modified solution I;

[0122] (3) Lower the temperature of the water bath to 30°C, add 0.1 g of polyacrylamide to the modified solution I, and continue stirring and reacting for 3 h to obtain the mixed solution II;

[0123] (4) After adding a certain amount of glacial acetic acid to the modified solution II to adjust the solution to be acidic, add 0.15 g of glutaraldehyde with a mass concentration of 5%, raise the temperature of the water bath to 60°C, and stir and react in the water bath for 1 h to obtain the modified solution III;

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

[0125] (6) Add 0.4 g of sodium lauryl polyoxyethylene ether sulfate and 0.3 g of glycerol to the modified solution III, and stir at room temperature until dissolved to finally obtain the anti-spray and high-consolidation dust suppressant.

[0126] Example 9

[0127] A preparation method of an anti-spray and high-consolidation dust suppressant for coal mine development specifically includes the following steps:

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

[0129] (2) Add 0.15 g of terephthalic acid to the aqueous tamarind gum solution and place it in a magnetic stirring constant temperature water bath. Stir and react at 60 °C in the water bath for 2 h to obtain modified solution I;

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

[0131] (4) After adding a certain amount of glacial acetic acid to modified solution II to adjust the solution to be acidic, add 0.05 g of glutaraldehyde with a mass concentration of 5%, and raise the temperature of the water bath to 60 °C. Stir and react in the water bath for 1 h to obtain modified solution III;

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

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

[0134] Comparative Example 1

[0135] Dissolve 0.1 g of tamarind gum in 100 mL of distilled water, and add 0.4 g of sodium lauryl polyoxyethylene ether sulfate thereto. Stir at room temperature until dissolved to obtain the dust suppressant material of Comparative Example 1.

[0136] Comparative Example 2

[0137] Dissolve 0.1 g of tamarind gum and 0.1 g of polyacrylamide in 100 mL of distilled water, and add 0.4 g of sodium lauryl polyoxyethylene ether sulfate thereto. Stir at room temperature until dissolved to obtain the dust suppressant material of Comparative Example 2.

[0138] Perform wind erosion resistance tests and anti-spray tests on various dust suppressant materials prepared in Examples 1-9 and Comparative Examples 1-2.

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

[0140] Place each sample on a simulated wind erosion environment experimental platform with a wind speed of 15 m / s, and use a handheld laser particle counter (9306-V2) to detect the concentrations of PM2.5 and PM10, and record them as C 0。Then, a quantitative amount of dust suppressant or comparative material was evenly sprayed onto pulverized coal of the same mass. After drying at a constant temperature of 50°C for 48 h, the samples were respectively placed in a simulated wind erosion environment test platform at 15 m / s. By measuring the concentrations of PM2.5 and PM10 again, they were recorded as C 1 。Each data was measured 3 times and the average value was taken. Let C 1 -C 0 be compared with the initial concentration C 0 . After calculation, the corresponding dust suppression efficiency was obtained.

[0141] As can be seen from Figure 2 , for Examples 1-9, the dust suppression efficiencies for PM2.5 and PM10 were both above 92%, while for Comparative Examples 1 and 2, they were only about 60%. This indicates that the control effects of Comparative Examples 1 and 2 on dust were poor, and the anti-wind erosion effects of Examples 1-9 met the basic expected effects.

[0142] The anti-spray test method was as follows:

[0143] The samples were placed in a simulated spray environment test platform with a spray flow rate of 8.9 L / min and spray durations of 1 min and 2 min respectively. By recording the mass m 0 of the samples before spraying and the mass m 1 after rain and drying, the anti-spray efficiency of the samples was calculated by the following formula, and the results are shown in Table 1 below.

[0144]

[0145] In the formula, η is the anti-rain efficiency (%), m 0 is the mass of the sample before rain (g), and m 1 is the mass after rain and drying (g).

[0146] Table 1 Anti-spray test

[0147]

[0148]

[0149] As can be seen from the above table, when the spray duration was 2 min, the dust fixation rates of Examples 1-9 were all above 95%, while those of Comparative Examples 1 and 2 were only 35% and 42% respectively. This is because the dust suppressant prepared in the present invention can adhere to coal dust particles, agglomerate fine dust particles into clusters, and form a strong protective film on the surface of the coal dust through the film-forming property of the material itself, preventing the underlying dust from being washed away by water spray.

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

[0151] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A spray-resistant, high-solidification dust suppressant for coal mining, characterized in that: The raw materials selected are calculated by weight percentage and include: 5-7 parts of tamarind gum; 2-3 parts of terephthalic acid; 4-6 parts of polyacrylamide; Glutaraldehyde 2-3 parts; 5-10 parts of sodium polyoxyethylene fatty alcohol ether sulfate; 3-5 parts of glycerin; The balance is distilled water.

2. The anti-spraying, high-solidification dust suppressant for coal mining as claimed in claim 1, characterized in that: The mass concentration of glutaraldehyde selected is 5%.

3. The method for preparing a spray-resistant, high-solidification dust suppressant for coal mining as claimed in claim 2, characterized in that: The following steps are involved: S1, add distilled water into a beaker, set the water bath temperature to 70°C, dissolve a certain amount of tamarind gum in the water, and stir in a water bath until dissolved to obtain a tamarind gum aqueous solution; S2, adding a certain amount of terephthalenediboric acid to the tamarind gum aqueous solution and placing it in a magnetic stirring constant temperature water bath, stirring and reacting at 60°C constant temperature water bath for 2 hours to obtain modified solution I; S3, lowering the water bath temperature to 30°C, adding a certain amount of polyacrylamide to the modified solution I, and continuing to stir and react for 3 hours to obtain a mixed solution II; S4, adding a certain amount of glacial acetic acid to the modified solution II to adjust the solution to be acidic, adding a certain amount of glutaraldehyde, and raising the temperature of the water bath to 60°C, stirring in the water bath for 1 hour to obtain a modified solution III; S5, lowering the water bath temperature to 30°C and adding a certain amount of sodium hydroxide to adjust the pH value of the modified solution III to neutral; S6. Add a certain amount of sodium fatty alcohol polyoxyethylene ether sulfate and glycerin to the modified solution III, stir at room temperature until dissolved, and then obtain an anti-spraying, high-solidification dust suppressant.

4. The anti-spraying, high-solidification dust suppressant for coal mining as claimed in claim 3, characterized in that: The selected raw materials include, by weight percentage, Tamarind gum: terephthalic acid: polyacrylamide: glutaraldehyde: sodium polyoxyethylene fatty alcohol ether sulfate: glycerol = 3:1:3:1:4:

3.

5. The method for preparing a spray-resistant, high-solidification dust suppressant for coal mining as claimed in claim 4, characterized in that: During the preparation process, when the total amount of distilled water is 200 ml, the weight of each raw material is: Tamarind gum 0.6g; 6. The method for preparing a spray-resistant, high-solidification dust suppressant for coal mining as claimed in claim 5, characterized in that: During the reaction, the reaction equation for the generation of modified product I by tamarind gum and terephthaloylboric acid is: (1) The reaction equation of modified product I with polyacrylamide and glutaraldehyde to generate modified product II is: (2)

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