A haze-removing dust-settling agent for mining areas and a preparation method thereof

Abstract

The present application relates to dust fall technical field, specifically related to a kind of mine area haze-removing dust fall agent and preparation method thereof, the haze-removing dust fall agent of the present application includes the following weight percentage components: polyether modified siloxane (0.12%-0.14%), polyether modified polydimethylsiloxane (0.18%-0.24%), sodium carboxymethyl cellulose (0.06%-0.08%), functionalized nano-silica (0.08%-0.12%) and water (balance);The present application is modified to nano-silica by using polyether siloxane with different long and short chain, on this basis, the functionalized nano-silica obtained by further modification of 4-dodecyl aniline, significantly improve the dust fall effect and wind erosion resistance and dust suppression lasting ability of haze-removing dust fall agent, also have certain metal anticorrosion capacity, suitable for coal mine, open pit mine and other dust control scene.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust fall, in particular to a haze-removing dust fall agent for mining areas and a preparation method thereof. BACKGROUND

[0002] With the progress of science and technology, the mechanization level of coal mine equipment has been continuously improved, a large number of modernized mines with high yield and high efficiency have emerged, and the economic benefits of coal mines have been greatly improved. Dust hazard is a problem that cannot be avoided in the safe production of mines. Dust floats in the air of the working environment and moves with the wind. Some dust forms dust accumulation under the action of gravity, which not only directly harms the health of workers, but also pollutes the environment and affects safe production. Under certain conditions, coal dust can also explode.

[0003] At present, the comprehensive dust prevention measures mainly using water are generally used in coal mines in China. For example, coal seam water injection, spray watering, wet operation and wet dust removal. The mechanism of spray dust fall is that water mist particles combine with dust particles floating in the air to increase the gravity and accelerate the settlement.

[0004] However, research and practice have shown that the dust fall effect of clean water is not ideal, and the dust fall rate can be up to about 60%. The dust fall rate of respirable dust is less than 30%, and the main reason for the low dust fall rate is the poor wettability of the surface of coal dust particles.

[0005] Patent technology document CN104087252A discloses a coal mine dust fall agent. The dust fall agent is low in price, harmless to human body, basically non-corrosive to equipment, and non-polluting to environment.

[0006] However, in actual use, the continuous dust suppression effect is poor, and secondary dust is often formed, causing waste of manpower and resources. SUMMARY

[0007] Therefore, the purpose of the present application is to provide a haze-removing dust fall agent for mining areas and a preparation method thereof, so as to solve the problems of weak wind erosion resistance and poor continuous dust suppression effect of traditional dust fall agents.

[0008] In order to achieve the above purpose, the present application provides a haze-removing dust fall agent for mining areas, which comprises the following components by weight percentage:

[0009] 0.12%-0.14% polyether modified siloxane, 0.18%-0.24% polyether modified polydimethylsiloxane, 0.06%-0.08% sodium carboxymethyl cellulose, 0.08%-0.12% functionalized nano silicon dioxide, and 99.42%-99.56% water;

[0010] The preparation steps of the functionalized nano silicon dioxide are as follows:

[0011] S1: hydrolysis and condensation of nano-silica and silane coupling agent KH570 to obtain alkenyl nano-silica;

[0012] S2: mixing alkenyl nano-silica, hydrogen-containing double seal, epoxy-terminated allyl polyether KL-11, epoxy-terminated allyl polyether KL-91B, then adding concentrated sulfuric acid and chloroplatinic acid, and performing hydrosilylation reaction at 70-75℃, and after the reaction is completed, purification is performed to obtain polyether siloxane modified nano-silica;

[0013] S3: mixing polyether siloxane modified nano-silica and 4-dodecyl aniline, and performing nucleophilic ring-opening addition reaction at 70-80℃, and after the reaction is completed, purification is performed to obtain functionalized nano-silica.

[0014] Preferably, the weight ratio of the nano-silica and the silane coupling agent KH570 in step S1 is 10-15g:1-1.5g.

[0015] Preferably, the particle size of the nano-silica in step S1 is 50-100nm.

[0016] Preferably, the weight ratio of the alkenyl nano-silica, hydrogen-containing double seal, epoxy-terminated allyl polyether KL-11, epoxy-terminated allyl polyether KL-91B, concentrated sulfuric acid, chloroplatinic acid in step S2 is 10-15:1.3-1.4:4-4.5:8-9:0.047-0.06:0.047-0.06.

[0017] Preferably, the average molecular weight of the epoxy-terminated allyl polyether KL-11 in step S2 is 450.

[0018] Preferably, the average molecular weight of the epoxy-terminated allyl polyether KL-91B in step S2 is 1000.

[0019] Preferably, the weight ratio of the polyether siloxane modified nano-silica and 4-dodecyl aniline in step S3 is 10-15g:2.5-3g.

[0020] Preferably, the type of the polyether modified siloxane is Silwet L-77.

[0021] Preferably, the type of the polyether modified polydimethylsiloxane is BYK-349.

[0022] Further, the present application also provides a preparation method of a haze and dust removal agent for mining areas, and the specific steps are as follows:

[0023] The polyether modified siloxane, the polyether modified polydimethylsiloxane, the sodium carboxymethyl cellulose, the functionalized nanosilica and water are mixed according to the weight percentage, and after being stirred uniformly, standing, a haze removing and dust setting agent for a mining area can be obtained.

[0024] The beneficial effects of the present application are:

[0025] The present application modifies the nanosilica by compounding long and short chain polyether siloxanes, forms a dynamic film structure of "short chain spreading-long chain strengthening", greatly improves the stability of the film structure, thereby resisting wind erosion shear force, avoiding brittle fracture of the film layer, significantly improving the dust setting effect and prolonging the dust suppression period.

[0026] The present application forms physical crosslinking points between the organic chain segments grafted on the surface of the functionalized nanosilica and the polyether, and at the same time, the nanosilica can form physical crosslinking points in the liquid film, improving the mechanical strength of the liquid film and inhibiting secondary dust raising.

[0027] The present application further modifies the polyether siloxane modified nanosilica with 4-dodecyl aniline, enhances the crosslinking structure, and at the same time, the benzene ring of the 4-dodecyl aniline is combined with the metal surface through coordination bond, and the long alkyl chain is arranged directionally to form a hydrophobic barrier, so that the dust setting effect and corrosion resistance of the dust setting agent are improved. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with specific examples.

[0029] The sources or properties of the raw materials used in the examples and comparative examples of the present application are as follows:

[0030] Nanosilica: particle size of 50-100 nm; end epoxy allyl polyether KL-11: average molecular weight of 450, purchased from Liaoning Kelong Fine Chemical Co., Ltd.;

[0031] End epoxy allyl polyether KL-91B: average molecular weight of 1000, purchased from Liaoning Kelong Fine Chemical Co., Ltd.;

[0032] Polyether modified siloxane: model Silwet L-77; polyether modified polydimethylsiloxane: model BYK-349.

[0033] Example 1: a haze removing and dust setting agent for a mining area, the specific preparation steps are as follows:

[0034] (1) Disperse 10 g of nano-silica in 50 mL of anhydrous ethanol and disperse uniformly by ultrasonication to obtain a suspension; then add 1 g of silane coupling agent KH570 to 10 mL of a mixed solution of ethanol / water (95:5), adjust the pH to 4, stir evenly, add it to the suspension, react at 80 ° C for 8 h, after the reaction is completed, centrifuge and wash, and finally dry in vacuum at 60 ° C to obtain olefinated nano-silica;

[0035] (2) 10 g of olefinated nano-silica was mixed with 1.3 g of hydrogen-containing double-capped, 4 g of terminal epoxy allyl polyether KL-11, and 8 g of terminal epoxy allyl polyether KL-91B, followed by the addition of 0.047 g of concentrated sulfuric acid and 0.047 g of chloroplatinic acid. The mixture was reacted at 70 ° C for 4 h. After the reaction was completed, the mixture was centrifuged, washed, and dried to obtain polyether siloxane-modified nano-silica.

[0036] (3) 10 g of polyethersiloxane-modified nano-silica was placed in a flask, and then 2.5 g of 4-dodecylaniline was slowly added dropwise. After the addition was completed, the mixture was reacted at 70 °C for 5 h. After the reaction was completed, the mixture was centrifuged, washed, and dried to obtain functionalized nano-silica.

[0037] (4) 0.12% polyether-modified silicone, 0.18% polyether-modified polydimethylsiloxane, 0.06% sodium carboxymethyl cellulose, 0.08% functionalized nano-silica, and 99.56% water are mixed according to weight percentage, stirred evenly, and allowed to stand to obtain a haze and dust reduction agent for mining areas.

[0038] Example 2: A haze removal and dust reduction agent for mining areas, the specific preparation steps are as follows:

[0039] (1) 13 g of nano-silica was dispersed in 55 mL of anhydrous ethanol and dispersed uniformly by ultrasonication to obtain a suspension; then 1.3 g of silane coupling agent KH570 was added to 10 mL of a mixed solution of ethanol / water (95:5), the pH was adjusted to 4.6, and after stirring evenly, it was added to the suspension and reacted at 80 ° C for 8 h. After the reaction was completed, the mixture was centrifuged and washed, and finally dried in vacuum at 60 ° C to obtain olefinated nano-silica;

[0040] (2) 13 g of olefin-modified nano-silica was mixed with 1.35 g of hydrogen-containing double-capped end cap, 4.3 g of end-epoxy allyl polyether KL-11, and 8.5 g of end-epoxy allyl polyether KL-91B, followed by the addition of 0.05 g of concentrated sulfuric acid and 0.05 g of chloroplatinic acid. The mixture was reacted at 73 ° C for 5 h. After the reaction was completed, the mixture was centrifuged, washed, and dried to obtain polyether siloxane-modified nano-silica.

[0041] (3) 13 g of polyether-modified nanosilica was placed in a flask, then 2.8 g of 4-dodecyl aniline was slowly added dropwise, after the addition was completed, it was reacted at 75°C for 6 h, after the reaction was completed, it was washed by centrifugation, dried, and functionalized nanosilica was obtained;

[0042] (4) 0.13% of polyether-modified siloxane, 0.21% of polyether-modified polydimethylsiloxane, 0.07% of sodium carboxymethyl cellulose, 0.10% of functionalized nanosilica, and 99.49% of water were mixed according to the weight percentage, after stirring uniformly, standing, a haze-removing and dust-settling agent for a mining area was obtained.

[0043] Example 3: A haze-removing and dust-settling agent for a mining area, the specific preparation steps are as follows:

[0044] (1) 15 g of nanosilica was dispersed into 60 mL of anhydrous ethanol, and ultrasonic dispersion was uniformly obtained to obtain a suspension; then 1.5 g of silane coupling agent KH570 was added into 10 mL of an ethanol / water (95:5 mixed solution, the pH was adjusted to 5, after stirring uniformly, it was added into the suspension, and it was reacted at 80°C for 8 h, after the reaction was completed, it was washed by centrifugation, and finally it was dried at 60°C under vacuum to obtain alkenyl nanosilica;

[0045] (2) 15 g of alkenyl nanosilica, 1.4 g of hydrogen-containing double-headed, 4.5 g of epoxy-terminated allyl polyether KL-11, and 9 g of epoxy-terminated allyl polyether KL-91B were mixed, then 0.06 g of concentrated sulfuric acid and 0.06 g of chloroplatinic acid were added, and it was reacted at 75°C for 5 h, after the reaction was completed, it was washed by centrifugation, dried, and polyether-siloxane-modified nanosilica was obtained;

[0046] (3) 15 g of polyether-siloxane-modified nanosilica was placed in a flask, then 3 g of 4-dodecyl aniline was slowly added dropwise, after the addition was completed, it was reacted at 80°C for 6 h, after the reaction was completed, it was washed by centrifugation, dried, and functionalized nanosilica was obtained;

[0047] (4) 0.14% of polyether-modified siloxane, 0.24% of polyether-modified polydimethylsiloxane, 0.08% of sodium carboxymethyl cellulose, 0.12% of functionalized nanosilica, and 99.42% of water were mixed according to the weight percentage, after stirring uniformly, standing, a haze-removing and dust-settling agent for a mining area was obtained.

[0048] Comparative Example 1:

[0049] The difference from Example 2 is that 4-dodecyl aniline is not added, and the remaining steps remain unchanged, and the specific steps are as follows:

[0050] (1) 13 g of nanosilica was dispersed into 55 mL of anhydrous ethanol, and ultrasonic dispersion was uniformly obtained to obtain a suspension;

[0051] Subsequently, 1.3 g of silane coupling agent KH570 was added to 10 mL of ethanol / water (a mixed solution of 95:5), the pH was adjusted to 4.6, after stirring uniformly, it was added to the suspension, reacted at 80°C for 8 h, after the reaction was completed, centrifugal washing, finally vacuum drying at 60°C, obtaining alkenylated nano-silica;

[0052] (2) 13 g of alkenylated nano-silica and 1.35 g of hydrogen-containing double-headed group, 4.3 g of epoxy-terminated allyl polyether KL-11, 8.5 g of epoxy-terminated allyl polyether KL-91B were mixed, then 0.05 g of concentrated sulfuric acid and 0.05 g of chloroplatinic acid were added, and reacted at 73°C for 5 h, after the reaction was completed, centrifugal washing, drying, obtaining polyether siloxane modified nano-silica;

[0053] (3) 0.13% of polyether modified siloxane, 0.21% of polyether modified polydimethylsiloxane, 0.07% of sodium carboxymethyl cellulose, 0.10% of polyether siloxane modified nano-silica, 99.49% of water were mixed according to the weight percentage, after stirring uniformly, standing, obtaining a haze and dust removing agent for mining area.

[0054] Comparative Example 2:

[0055] The difference from Example 2 is that only epoxy-terminated allyl polyether KL-11 is added in step (2), and the rest of the steps remain unchanged, the specific steps are as follows:

[0056] (1) 13 g of nano-silica was dispersed into 55 mL of anhydrous ethanol, and ultrasonic dispersion was uniformly obtained to obtain a suspension;

[0057] Subsequently, 1.3 g of silane coupling agent KH570 was added to 10 mL of ethanol / water (a mixed solution of 95:5), the pH was adjusted to 4.6, after stirring uniformly, it was added to the suspension, reacted at 80°C for 8 h, after the reaction was completed, centrifugal washing, finally vacuum drying at 60°C, obtaining alkenylated nano-silica;

[0058] (2) 13 g of alkenylated nano-silica and 1.35 g of hydrogen-containing double-headed group, 8.13 g of epoxy-terminated allyl polyether KL-11 were mixed, then 0.05 g of concentrated sulfuric acid and 0.05 g of chloroplatinic acid were added, and reacted at 73°C for 5 h, after the reaction was completed, centrifugal washing, drying, obtaining polyether siloxane modified nano-silica;

[0059] (3) 13 g of polyether siloxane modified nano-silica was placed in a flask, then 2.8 g of 4-dodecyl aniline was slowly added dropwise, after the addition was completed, it was reacted at 75°C for 6 h, after the reaction was completed, centrifugal washing, drying, obtaining functionalized nano-silica;

[0060] (4) 0.13% polyether modified siloxane, 0.21% polyether modified dimethicone, 0.07% sodium carboxymethyl cellulose, 0.10% functionalized nano-silica, 99.49% water are mixed according to the weight percentage, stirred uniformly, and then left to stand, to obtain a haze-removing and dust-settling agent for mining areas.

[0061] Comparative Example 3:

[0062] The difference from Example 2 is that only the epoxy-terminated allyl polyether KL-91B is added in step (2), and the specific steps are as follows:

[0063] (1) 13 g of nano-silica is dispersed into 55 mL of anhydrous ethanol, and ultrasonic dispersion is performed to obtain a suspension;

[0064] Then, 1.3 g of silane coupling agent KH570 is added into 10 mL of an ethanol / water (95:5 mixed solution, and the pH is adjusted to 4.6. After stirring uniformly, it is added into the suspension, and reaction is performed at 80°C for 8 h. After the reaction is completed, centrifugal washing is performed, and finally drying is performed at 60°C under vacuum to obtain allylated nano-silica;

[0065] (2) 13 g of allylated nano-silica and 1.35 g of hydrogen-containing double- capped are mixed, 18.1 g of epoxy-terminated allyl polyether KL-91B is added, then 0.05 g of concentrated sulfuric acid and 0.05 g of chloroplatinic acid are added, and reaction is performed at 73°C for 5 h. After the reaction is completed, centrifugal washing is performed, and drying is performed to obtain polyether siloxane modified nano-silica;

[0066] (3) 13 g of polyether siloxane modified nano-silica is placed in a flask, then 2.8 g of 4-dodecyl aniline is slowly added dropwise, and after the dropwise addition is completed, reaction is performed at 75°C for 6 h. After the reaction is completed, centrifugal washing is performed, and drying is performed to obtain functionalized nano-silica;

[0067] (4) 0.13% polyether modified siloxane, 0.21% polyether modified dimethicone, 0.07% sodium carboxymethyl cellulose, 0.10% functionalized nano-silica, 99.49% water are mixed according to the weight percentage, stirred uniformly, and then left to stand, to obtain a haze-removing and dust-settling agent for mining areas.

[0068] Comparative Example 4:

[0069] The difference from Example 2 is that no functionalized nano-silica is added, and the specific steps are as follows:

[0070] 0.13% polyether modified siloxane, 0.21% polyether modified dimethicone, 0.07% sodium carboxymethyl cellulose, 99.59% water are mixed according to the weight percentage, stirred uniformly, and then left to stand, to obtain a haze-removing and dust-settling agent for mining areas.

[0071] Control example: directly use mine water as haze dust-settling agent.

[0072] Performance test

[0073] Corrosion resistance: according to GB 10124-88 "Metal material laboratory uniform corrosion immersion test method", select ordinary bolt as experimental sample, put the bolt into the dust-settling agent solution for 20d, take out after 20d, calculate the corrosion rate;

[0074] Wind erosion resistance: evenly spread 25g, 200 mesh coal dust on a square acrylic plate with a side length of 15cm and a thickness of 0.3cm, weigh the acrylic plate as m1, then take 25g of dust-settling agent and evenly spray it on the surface of the coal dust, dry and weigh as m2, then use the air blower to blow at a wind speed of 10m / s for 5min, then weigh again as m3, calculate the wind erosion resistance according to the following formula:

[0075] Wind erosion resistance (%) = × 100%;

[0076] Dust-settling rate: pour the sieved coal dust (≤15μm) into the dust-throwing instrument, the feeding speed of the dust-throwing instrument is 15mm / min, the dust injection pressure is 0.3Mpa, the spray pressure is set to 2.5Mpa, when the dust-settling agent is sprayed, the dust sampler collects for 1min at a flow rate of 25L / min, each group of experiment is repeated for 3 times to measure the dust concentration before and after dust-settling, take the average dust concentration as the experimental data, calculate the dust-settling rate by the following formula:

[0077] Dust-settling rate (%) = × 100%, wherein: C1 is the average value of roadway dust concentration before dust-settling, mg / m 3 ; C2 is the average value of roadway dust concentration after dust-settling, mg / m 3 ;

[0078] Field working condition experiment:

[0079] Industrial test was carried out in a certain open limestone mine, a section of road surface was selected as the test object (divided into 8 sections, each section 1km, as the test object of the examples and the comparative examples, control example), the mine rock transport vehicle was 30 tons of heavy truck, the vehicle flow was 15 vehicles / h;

[0080] Spray the examples, comparative examples and control example as dust suppressant on the test road surface by using water spraying vehicle, measure the dust concentration at eight o'clock every morning, define as invalid when the dust suppression efficiency decreases to 80% of the initial value, the test results are shown in Table 1.

[0081] Table 1 Performance test results

[0082] Dust reduction rate (%) Wind erosion resistance (%) Dust suppression period (d) Corrosion rate (%) Example 1 82.3 10.34 31 0.075 Example 2 85.5 9.67 32 0.072 Example 3 81.8 11.21 30 0.075 Comparative Example 1 77.1 15.82 18 0.089 Comparative Example 2 75.6 18.45 15 0.094 Comparative Example 3 74.8 20.13 14 0.102 Comparative Example 4 64.6 36.35 7 0.103 Comparative Example 40.6 88.14 4 0.185

[0083] Data analysis: The mine area haze dust fall agent prepared by the present application shows excellent comprehensive performance. The dust fall agent significantly improves the anti-erosion performance while maintaining high dust fall efficiency and inhibits the probability of secondary dust raising. From the performance data, it can be inferred that the short-chain polyether siloxane quickly spreads to form a basic film layer through its high mobility, while the long-chain one builds a three-dimensional network skeleton through molecular chain entanglement. The gradient molecular structure formed by both makes the liquid film have both fast film-forming property and mechanical strength. Meanwhile, the introduction of 4-dodecyl aniline can form π-hydrogen bond with the hydroxyl group on the surface of nano-silicon dioxide through its benzene ring, and the long alkyl chain can form certain physical entanglement with polyether siloxane. This unique interface layer not only enhances the overall crosslinking density, but also significantly improves the contact area and bonding strength with dust. The hydrophobic alkyl chain and large benzene ring structure of 4-dodecyl aniline can effectively improve its corrosion resistance, so that the dust fall agent can adapt to the complex and variable mine environment and achieve long-acting dust suppression effect.

[0084] From the performance data comparison of Example 2 and Comparative Example 1, it can be observed that after the introduction of 4-dodecyl aniline modification, not only the dust fall efficiency is enhanced, but also the anti-erosion performance is significantly improved and the dust suppression period is prolonged. This indicates that the long-chain alkyl in its molecular structure produces intermolecular entanglement with the chain segment of polyether siloxane, thereby constructing a more stable three-dimensional network structure. Meanwhile, the benzene ring in its molecular structure can form π-hydrogen bond with the silicon hydroxyl group on the surface of nano-particles. And due to its grafting on polyether siloxane with different chain lengths, under the condition of wind erosion, it can dissipate mechanical energy through π-π interaction between benzene rings, so that the liquid film maintains structural integrity. At the same time, it can form an adsorption protective layer on the metal surface, which together with sodium carboxymethyl cellulose blocks the penetration of corrosion medium.

[0085] From the performance data comparison and analysis of Example 2 and Comparative Examples 2 and 3, it can be seen that the two polyether siloxane compound modification technical solutions exhibit significant synergistic effect. The introduction of the two-component polyether system enables the dust fall agent to maintain high dust fall efficiency while the wind erosion resistance is significantly improved. This may be due to the complementary action of the two polyether molecular chain structures: KL-11 with a shorter chain realizes rapid wetting and spreading through its higher diffusion coefficient to form a continuous base film layer; and KL-91B with a longer chain forms a three-dimensional network skeleton through molecular chain entanglement to enhance the structural strength of the liquid film. Under wind erosion conditions, this "short-chain spreading-long-chain strengthening" synergistic mechanism may form a gradient modulus distribution, so that the liquid film maintains appropriate flexibility on the surface while maintaining sufficient mechanical strength inside to resist shear force. This structure dissipates energy through chain segment sliding under mechanical external force, avoiding brittle fracture of the film layer, thereby further enhancing its dust fall performance and stability, and the more stable film structure can better protect the metal from corrosion.

[0086] From the performance data comparison and analysis of Example 2 and Comparative Example 4, it can be seen that the nanoparticles modified by polyether siloxane and 4-dodecyl aniline may form an organic-inorganic hybrid interface layer with a specific topological structure on the surface. This structure not only retains the high specific surface area characteristics of nano-silicon dioxide, but also endows it with good dispersibility and interfacial compatibility through organic modification. Under wind erosion conditions, the modified nanoparticles can form physical crosslinking points in the liquid film to enhance the mechanical strength of the film layer, and the organic segments grafted on the surface of the nanoparticles can dissipate wind energy through molecular chain entanglement and dynamic bonding, while they can also be arranged directionally on the metal surface to form a dense physical barrier layer that effectively blocks the penetration of corrosive media.

[0087] It should be understood by those skilled in the art that the above discussion of any of the embodiments is merely exemplary and is not intended to suggest that the scope of the present application is limited to these examples; under the idea of the present application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present application as described above. In order to be brief, they are not provided in detail.

Claims

1. A haze removal and dust reduction agent for mining areas, characterized in that: The invention comprises the following components in weight percentage: 0.12%-0.14% polyether-modified silicone, 0.18%-0.24% polyether-modified polydimethylsiloxane, 0.06%-0.08% sodium carboxymethyl cellulose, 0.08%-0.12% functionalized nano-silica, and 99.42%-99.56% water; The preparation steps of the functionalized nano-silica are as follows: S1: hydrolyzing and condensing nano-silica and silane coupling agent KH570 to obtain olefinated nano-silica; S2: Mixing olefinated nano-silica, hydrogen-containing double-capped end cap, epoxy-allyl-terminated polyether KL-11, and epoxy-allyl-terminated polyether KL-91B, followed by adding concentrated sulfuric acid and chloroplatinic acid, and performing a hydrosilylation reaction at 70-75°C. After the reaction is completed, purification is performed to obtain polyethersiloxane-modified nano-silica; S3: Mixing polyether siloxane-modified nano-silica and 4-dodecylaniline, performing a nucleophilic ring-opening addition reaction at 70-80° C., and purifying after the reaction to obtain functionalized nano-silica.

2. The haze and dust reduction agent for mining areas according to claim 1, characterized in that: The weight ratio of the nano-silica to the silane coupling agent KH570 in step S1 is 10-15g:1-1.5g.

3. The haze removal and dust suppression agent for mining areas according to claim 1, characterized in that: The particle size of the nano-silica in step S1 is 50-100 nm.

4. The haze removal and dust suppression agent for mining areas according to claim 1, characterized in that: The weight ratio of the olefinated nano-silica, hydrogen-containing double head, epoxy-terminated allyl polyether KL-11, epoxy-terminated allyl polyether KL-91B, concentrated sulfuric acid, and chloroplatinic acid in step S2 is 10-15g:1.3-1.4g:4-4.5g:8-9g:0.047-0.06g:0.047-0.06g.

5. The haze removal and dust suppression agent for mining areas according to claim 1, characterized in that: The average molecular weight of the epoxy-terminated allyl polyether KL-11 in step S2 is 450.

6. The haze removal and dust suppression agent for mining areas according to claim 1, characterized in that: The average molecular weight of the epoxy-terminated allyl polyether KL-91B in step S2 is 1000.

7. The haze and dust reduction agent for mining areas according to claim 1, characterized in that: The weight ratio of the polyethersiloxane-modified nano-silica to 4-dodecylaniline in step S3 is 10-15 g:2.5-3 g.

8. The haze and dust reduction agent for mining areas according to claim 1, characterized in that: The model of the polyether-modified silicone is Silwet L-77.

9. The haze and dust reduction agent for mining areas according to claim 1, characterized in that: The polyether-modified polydimethylsiloxane model is BYK-349.

10. A method for preparing the haze removal and dust suppression agent for mining areas according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: Polyether-modified siloxane, polyether-modified polydimethylsiloxane, sodium carboxymethyl cellulose, functionalized nano-silica and water are mixed according to weight percentage, stirred evenly and allowed to stand to obtain a haze removal and dust reduction agent for mining areas.