Environment-friendly anti-freezing dust suppressant and preparation method thereof

Abstract

The invention provides an environment-friendly anti-freezing dust suppressant and a preparation method thereof. The environment-friendly anti-freezing dust suppressant comprises a surfactant, a binder, an anti-freezing agent, a corrosion inhibitor, a green tea extract and a solvent. According to the environment-friendly anti-freezing dust suppressant, the natural component green tea extract is used as an environment-friendly additive, the environment-friendly performance and biodegradability of the dust suppressant can be effectively improved, the green tea extract and other components in the environment-friendly anti-freezing dust suppressant cooperate with each other, the anti-freezing performance of the dust suppressant is effectively improved, and the dust suppressant has a good anti-freezing effect. The dust suppressant can keep a good dust suppression effect under a low-temperature condition, the problems of water resource waste and road icing are avoided, and the risk of environmental pollution can be reduced. The environment-friendly anti-freezing dust suppressant disclosed by the invention is used for removing dust, can be effectively sprayed and cover an area under a cold condition, effectively prevents dust from raising and diffusing, and realizes effective treatment on the problem of dusting in winter.

Description

Technical Field

[0001] The invention relates to the technical field of dust suppressants, and in particular to an environmentally friendly antifreeze dust suppressant and a preparation method thereof. Background Art

[0002] During the mining, storage and transportation of open-pit coal mines, the dust raised not only poses a serious threat to the environment, but also poses a potential risk to the health of workers. Especially in the cold winter, the low temperature limits the use of water, the effect of traditional water spraying dust reduction methods is greatly reduced, and it is easy to cause ice on the road, thus threatening transportation safety. In addition, the intensification of dust problems in open-pit coal mines in winter makes it particularly urgent to develop an antifreeze dust suppressant that can effectively control dust diffusion and adapt to the needs of low-temperature environments.

[0003] The antifreeze components in existing antifreeze and dust suppressants are mostly ethylene glycol, propylene glycol, glycerol, methanol, calcium chloride, glycerol and other substances. It is difficult to balance the antifreeze effect and environmental protection issues. The main reasons are: on the one hand, high-efficiency antifreeze agents are usually harmful to the environment. Although traditional antifreeze agents such as ethylene glycol and methanol have significant antifreeze effects, they are highly toxic and harmful to water bodies, soil and ecosystems. Especially when used in the industrial field, if they are not handled properly, such antifreeze agents will cause long-term harm to the surrounding environment. On the other hand, the antifreeze performance of environmentally friendly antifreeze agents needs to be improved. Although relatively environmentally friendly antifreeze agents such as propylene glycol, glycerol and glycerol have low toxicity and are biodegradable, they are usually inferior to ethylene glycol antifreeze agents in antifreeze performance, especially at extremely low temperatures, and the antifreeze effect is poor. Summary of the invention

[0004] The main purpose of the present invention is to provide an environmentally friendly antifreeze dust suppressant and a preparation method thereof, so as to solve the problem that the antifreeze agent in the prior art cannot take into account both the antifreeze effect and environmental protection.

[0005] In order to achieve the above object, according to one aspect of the present invention, an environmentally friendly antifreeze and dust suppressant is provided, comprising: a surfactant, a binder, an antifreeze agent, a corrosion inhibitor, a green tea extract and a solvent.

[0006] Furthermore, the green tea extract includes one or more of catechin compounds, flavonoid compounds, flavonol compounds, anthocyanin compounds and phenolic acid compounds.

[0007] Further, the catechin extract includes one or more of catechin, epicatechin, gallocatechin, epigallocatechin, catechin gallate, epicatechin gallate, gallocatechin gallate and epigallocatechin gallate; and / or, the flavonoids include one or more of quercetin, rutin, apigenin and genistein; and / or, the flavonols include one or more of myricetin, myricetin, morin and morifoliin; and / or, the anthocyanins include one or more of cyanidin, delphinidin, pelargonidin and peonidin; and / or, the phenolic acid compounds include one or more of caffeic acid, vanillic acid and p-hydroxybenzoic acid.

[0008] Furthermore, in terms of weight percentage, the green tea extract accounts for 0.05-0.15% of the environmentally friendly antifreeze and dust suppressant.

[0009] Furthermore, the environmentally friendly antifreeze and dust suppressant comprises, by weight percentage: 0.2-2% of a surfactant, 0.05-0.5% of a binder, 20-30% of an antifreeze agent, 0.002-0.008% of a corrosion inhibitor, 0.05-0.1% of a green tea extract, and the remainder being a solvent; preferably, the weight ratio of the green tea extract to the antifreeze agent is (0.0025-0.0045):1; preferably, the total weight percentage of the green tea extract and the antifreeze agent accounts for 22.32-30.1% of the environmentally friendly antifreeze and dust suppressant.

[0010] Further, the surfactant includes one or more of polyoxyethylene laurate (9), alkyl glycoside, sodium dodecylbenzene sulfonate and polyacrylamide; preferably, when the surfactant includes polyoxyethylene laurate (9) and alkyl glycoside, the weight ratio of the two is (1-2):1; preferably, the HLB value of the surfactant is 10-15; and / or, the binder includes one or more of polyacrylic acid, polyvinyl alcohol, sodium carboxymethyl cellulose, polyacrylamide, guar gum, sodium dodecyl sulfate and sodium lactate; and / or, the antifreeze includes one or more of ethylene glycol, glycerol, methanol, ethanol and calcium chloride; and / or, the corrosion inhibitor includes one or more of polyaspartic acid, glycine and cysteine; and / or, the solvent includes one or more of water, polyvinyl alcohol, water-soluble starch and sodium borate.

[0011] Furthermore, the freezing point of the environmentally friendly antifreeze dust suppressant is ≤-11°C, the metal corrosion is ≤0.018mm / a, and the grass seed germination rate is ≥79%; and / or, the dust suppression efficiency of the environmentally friendly antifreeze dust suppressant is ≥94%.

[0012] According to another aspect of the present invention, a method for preparing the above-mentioned environmentally friendly antifreeze and dust suppressant is provided, comprising the following steps: mixing a surfactant, a binder, an antifreeze agent, a corrosion inhibitor, a green tea extract and a solvent to obtain the environmentally friendly antifreeze and dust suppressant.

[0013] Further, the solvent is divided into two parts, namely a first solvent and a second solvent; step S1, the surfactant and the first solvent are mixed for the first time, and then a binder is added for the second mixing, and then a corrosion inhibitor and a green tea extract are added for the third mixing to obtain a first solution; step S2, the antifreeze agent and the second solvent are mixed for the fourth time to obtain a second solution; step S3, the first solution and the second solution are mixed for the fifth time to obtain an environmentally friendly antifreeze and dust suppressant.

[0014] Furthermore, the weight ratio of the first solvent to the second solvent is (0.05-0.1):1; and / or, independently, the rotation speed of the first mixing, the second mixing, the third mixing, the fourth mixing and the fifth mixing is 350-500 rpm, the time is 30-60 min, and the temperature is 55-80°C; and / or, the addition rate of the binder is 1.8-2.5 mL / min; and / or, the pH value of the environmentally friendly antifreeze and dust suppressant is 6.5-7.1.

[0015] The present invention can improve the environmental performance, durability and biodegradability of the dust suppressant by introducing the natural ingredient green tea extract into the environmentally friendly antifreeze dust suppressant. In addition, the green tea extract can cooperate with other components to make the dust suppressant have good adhesion effect, film-forming stability, antifreeze performance and wetting performance, and can maintain a good dust suppression effect under low temperature conditions, effectively avoid the waste of water resources and road icing problems, and can reduce the risk of environmental pollution. The environmentally friendly antifreeze dust suppressant of the present invention is used for dust removal, and can be effectively sprayed and covered in cold conditions, effectively preventing the dust from being raised and spread, and achieving effective control of the dust problem in winter. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below in conjunction with the embodiments.

[0017] Terminology explanation:

[0018] HLB: Hydrophile-Lipophile Balance, a value that measures the relative strength of the hydrophilic and lipophilic parts of a surfactant molecule.

[0019] As described in the background of the present invention, the dust suppressant in the prior art cannot take into account both antifreeze effect and environmental protection. In order to solve the above problem, in a typical embodiment of the present invention, an environmentally friendly antifreeze dust suppressant is provided, including: a surfactant, a binder, an antifreeze agent, a corrosion inhibitor, a green tea extract and a solvent.

[0020]

Green Tea Extract

[0021] The environmentally friendly antifreeze dust suppressant of this application introduces the natural ingredient green tea extract as a key environmentally friendly additive. The green tea extract has strong adhesion and film-forming properties, and can cooperate with other ingredients to enable the dust suppressant to maintain good adhesion and consolidation effects in a low temperature environment, reduce secondary sand blowing, and significantly improve the dust suppression effect of the dust suppressant. In addition, the antioxidant, biodegradable and low toxicity properties of green tea extract are conducive to improving microbial activity, accelerating the biodegradation process of organic components, and promoting soil recovery and plant growth, improving soil structure, improving water retention and fertility, and also helping to inhibit the formation of toxic by-products, reduce health risks, and can maintain activity in the dust suppression layer for a long time, avoid microbial erosion, and can improve the environmental performance, durability and biodegradability of the dust suppressant. Compared with gallic acid, green tea extract is less toxic, less irritating, harmless to human health, and has more outstanding environmental performance.

[0022]

Antifreeze

[0023] In addition, the addition of antifreeze can effectively lower the freezing point of the dust suppressant, prevent it from freezing under low temperature conditions, and enable it to be sprayed evenly. The polyhydroxy structure in the green tea extract interacts with the antifreeze (such as ethylene glycol, propylene glycol, etc.) through hydrogen bonds and van der Waals forces, which not only helps to maintain the liquid state of the dust suppressant in a low temperature environment, but also reduces the volatilization and oxidative decomposition of the antifreeze, thereby helping to prolong the effectiveness of the antifreeze and enhance the adhesion and film-forming properties of the dust suppressant. This synergistic effect is particularly evident under low temperature conditions, allowing the dust suppressant to maintain excellent dust suppression performance in extreme climates, significantly exceeding the effect of each component when used alone.

[0024]

Corrosion inhibitor

[0025] Secondly, corrosion inhibitors (such as polyaspartic acid, glycine, etc.) can form an adsorption layer on the surface of mechanical equipment, and can further reduce the corrosion rate by preventing the generation of corrosive ions on the metal surface of mechanical equipment. Green tea extract and corrosion inhibitors work synergistically. On the one hand, they can enhance the density and stability of the adsorption layer through hydrogen bonds or van der Waals forces, and improve the hydrolysis resistance and corrosion resistance of the film layer. On the other hand, the polyphenol compounds in green tea extract have acid neutralization ability and can react with acidic media in corrosive environments to reduce the corrosion of acidic media to metals, thereby effectively protecting the contacted mechanical equipment from corrosion pollution.

[0026]

Binder

[0027] In addition, green tea extract contains more hydroxyl groups, which can participate in the cross-linking reaction of the binder molecules and form multiple hydrogen bonds with the hydroxyl, carboxyl or ether bonds of the binder, which can not only significantly enhance the adhesion of the dust suppressant on the surface of the dust particles, but also form a denser and more stable film-forming structure through intermolecular cross-linking reactions, preventing the solvent from evaporating too quickly, thus helping to prolong the durability of the dust suppression layer. Compared with single-component binders or green tea extracts, the intermolecular cross-linking network can improve the stability and durability of the dust suppressant and has a more efficient consolidation effect on dust.

[0028] [Surfactant]

[0029] Moreover, the polyphenol structure of green tea extract combined with the surfactant reduces the surface tension of the dust suppressant, allowing the dust suppressant to form a uniform and complete covering layer on the surface of the dust particles. In addition, the surfactant significantly enhances the expansion and distribution of the liquid film, which improves the permeability of the dust suppressant between dust particles, thereby improving the wetting and dispersion ability of the dust suppressant.

[0030] Green tea extract works together with surfactants, binders and solvents to significantly reduce the surface tension of dust suppressants, enhance the adhesion of dust suppressants on the surface of dust particles, form a dense, uniform, complete and stable film-forming structure, while taking into account fluidity and stability, so that the dust suppressant can effectively adhere to the dust surface.

[0031] In summary, the present application can improve the environmental performance, durability and biodegradability of the environmentally friendly antifreeze dust suppressant by introducing the natural ingredient green tea extract into the environmentally friendly antifreeze dust suppressant. In addition, the green tea extract can cooperate with other components to make the dust suppressant have good adhesion effect, film-forming stability, antifreeze performance and wetting performance, and can maintain a good dust suppression effect under low temperature conditions, effectively avoiding the waste of water resources and road icing problems, and can reduce the risk of environmental pollution.

[0032] In a preferred embodiment, the green tea extract includes one or more of catechin compounds, flavonoids, flavonols, anthocyanins and phenolic acids. The above-mentioned green tea extracts are less toxic, less irritating, harmless to human health, and have more outstanding environmental performance.

[0033] In a preferred embodiment, the catechin extract includes one or more of catechin, epicatechin, gallocatechin, epigallocatechin, catechin gallate, epicatechin gallate, gallocatechin gallate and epigallocatechin gallate.

[0034] Compared with the environmentally friendly additives in the prior art, the main ingredients of green tea extract, catechin compounds, especially catechin, epicatechin, gallocatechin, epigallocatechin, catechin gallate, epicatechin gallate, gallocatechin gallate and epigallocatechin gallate, have the advantages of being non-toxic, environmentally friendly and antioxidant. When used as ingredients of environmentally friendly antifreeze dust suppressants, they can improve the environmental performance and biodegradability of the dust suppressants. Moreover, they can further cooperate with other ingredients to further improve the wetting and dust reduction performance of the dust suppressants.

[0035] Specifically, catechin compounds have a unique structure, contain multiple ortho-hydroxyl groups, catechol groups or benzene rings, have strong free radical scavenging ability, can form strong hydrogen bonds and van der Waals forces with dust particles, binders, antifreeze agents and surfactants, effectively combine with free radicals, terminate free radical chain reactions, and thus significantly enhance the adhesion and film-forming properties of dust suppressants, which is beneficial to improve the wetting and dust reduction performance of dust suppressants. Moreover, catechin compounds in green tea extract have higher antioxidant capacity, and compared with traditional environmentally friendly additives such as gallic acid, they can more effectively neutralize free radicals and reduce the oxidative decomposition of other components in antifreeze agents or dust suppressants. This can not only reduce the risk of toxic by-products, but also improve the environmental friendliness and overall stability of dust suppressants.

[0036] In a preferred embodiment, the flavonoids include one or more of quercetin, rutin, apigenin and genistein; and / or, the flavonols include one or more of myricetin, myricetin, morin and morin; and / or, the anthocyanins include one or more of cyanidin, delphinidin, pelargonidin and peony; and / or, the phenolic acid compounds include one or more of caffeic acid, vanillic acid and p-hydroxybenzoic acid. The above-mentioned types of green tea extracts are less toxic, less irritating, harmless to human health, and have more outstanding environmental performance.

[0037] In a preferred embodiment, the green tea extract accounts for 0.05-0.15% by weight in the environmentally friendly antifreeze dust suppressant. Under the above conditions, the environmentally friendly antifreeze dust suppressant has better environmental performance and biodegradability, is more conducive to reducing environmental pollution risks, and the viscosity of the environmentally friendly antifreeze dust suppressant solution is more suitable and the cost is lower.

[0038] In order to better balance the environmental protection and antifreeze properties of the environmentally friendly antifreeze dust suppressant, in a preferred embodiment, the environmentally friendly antifreeze dust suppressant includes, by weight percentage: 0.2-2% surfactant, 0.05-0.5% binder, 20-30% antifreeze agent, 0.002-0.008% corrosion inhibitor, 0.05-0.1% green tea extract, and the balance is solvent. Under the above conditions, the environmentally friendly antifreeze dust suppressant has better fluidity and stability, is more green and environmentally friendly, has stronger biodegradability, and has better antifreeze effect.

[0039] Based on similar reasons, in a preferred embodiment, the weight ratio of green tea extract to antifreeze agent is (0.0025-0.0045):1; the total weight percentage of green tea extract and antifreeze agent accounts for 22.32%-30.1% of the environmentally friendly antifreeze dust suppressant.

[0040] Surfactants, binders, antifreeze agents, corrosion inhibitors and solvents can be selected from conventional types in the technical field. The inventors comprehensively considered environmental impact, cost-effectiveness and practical application requirements, and preferred the types of specific ingredients. In a preferred embodiment, the surfactant includes one or more of polyoxyethylene laurate (9), alkyl glycoside, sodium dodecylbenzene sulfonate and polyacrylamide; preferably, when the surfactant includes polyoxyethylene laurate (9) and alkyl glycoside, the weight ratio between the two is (2-1):1; preferably, the HLB value of the surfactant is 10-15; and / or, the binder includes one or more of polyacrylic acid, polyvinyl alcohol, sodium carboxymethyl cellulose, polyacrylamide, guar gum, sodium lauryl sulfate and sodium lactate; and / or, the antifreeze agent includes one or more of ethylene glycol, glycerol, methanol, ethanol and calcium chloride; and / or, the corrosion inhibitor includes one or more of polyaspartic acid, glycine and cysteine; and / or, the solvent is one or more of water, polyvinyl alcohol, water-soluble starch and sodium borate. Under the above conditions, the compatibility between the components is better, and the green tea extract of the present application can cooperate with the above components, so that the adhesion effect, film-forming stability, antifreeze performance and wetting performance of the dust suppressant are better.

[0041] In a preferred embodiment, the freezing point of the environmentally friendly antifreeze dust suppressant is ≤-11°C, the metal corrosion is ≤0.018mm / a, and the grass seed germination rate is ≥79%; and / or the dust suppression efficiency of the environmentally friendly antifreeze dust suppressant is ≥94%. Under the above conditions, the environmentally friendly antifreeze dust suppressant has better negative temperature resistance, anti-corrosion performance, and dust suppression effect.

[0042] In another typical embodiment of the present invention, a method for preparing the above-mentioned environmentally friendly antifreeze dust suppressant is also provided, comprising the following steps: mixing a surfactant, a binder, an antifreeze agent, a corrosion inhibitor, a green tea extract and a solvent to obtain an environmentally friendly antifreeze dust suppressant. The preparation method of the present application is simple, has fewer processes, and is low in cost. The prepared environmentally friendly antifreeze dust suppressant solution is stable, has good dust suppression and antifreeze effects, can effectively avoid the waste of water resources and road icing problems during use, is biodegradable, green and environmentally friendly, and can significantly reduce the risk of environmental pollution.

[0043] In order to make the components more fully mixed and dissolved, so as to obtain an environmentally friendly antifreeze dust suppressant with better stability and better comprehensive performance, in a preferred embodiment, the solvent is divided into two parts, namely the first solvent and the second solvent; step S1, the surfactant and the first solvent are first mixed, then the binder is added for the second mixing, and then the corrosion inhibitor and the green tea extract are added for the third mixing to obtain the first solution; step S2, the antifreeze agent and the second solvent are fourth mixed to obtain the second solution; step S3, the first solution and the second solution are fifth mixed to obtain the environmentally friendly antifreeze dust suppressant. Under the above conditions, a dense film-forming structure can be more fully formed and the components can work together more effectively, further improving the adhesion, stability and antifreeze performance of the dust suppressant.

[0044] Based on similar reasons, in a preferred embodiment, the weight ratio of the first solvent to the second solvent is (0.05-0.1): 1. In a preferred embodiment, independently, the rotation speed of the first mixing, the second mixing, the third mixing, the fourth mixing and the fifth mixing is 350-500 rpm, the time is 30-60 min, and the temperature is 55-80° C.; preferably, the addition rate of the binder is 1.8-2.5 mL / min.

[0045] In a preferred embodiment, the pH value of the environmentally friendly antifreeze dust suppressant is 6.5 to 7.1. Under the above conditions, the application effect of the environmentally friendly antifreeze dust suppressant is better and the stability is stronger.

[0046] In another typical embodiment of the present invention, the application of the above-mentioned environmentally friendly antifreeze dust suppressant in one or more fields of open-pit coal mines, areas involved in coal and mineral powder transportation, building demolition sites, stockpiles, civil construction and surrounding roads, power plants, mines, mineral earthwork storage and unloading sites, cement plants, steel plants, metallurgical plants, dust workshops and artificial beaches is also provided. The environmentally friendly antifreeze dust suppressant of the present invention is used in the above-mentioned fields, especially in mines in cold areas, to ensure effective spraying and covering of the site under cold conditions, effectively prevent the lifting and diffusion of dust, and achieve effective control of dust problems in winter. The environmentally friendly antifreeze dust suppressant of the present invention helps to improve the working environment of open-pit coal mines, especially mines in cold areas, protect the health of operators and the safety of equipment, while reducing environmental pollution and promoting the sustainable development of open-pit mines.

[0047] The present application is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in the present application.

[0048] Example 1

[0049] The components of the environmentally friendly antifreeze and dust suppressant are detailed in Table 1. According to the component ratio of the environmentally friendly antifreeze and dust suppressant, weigh each raw material.

[0050] Step S1, adding a surfactant to the first part of the solvent, stirring at 60°C and 350 rpm for 45 minutes, then slowly adding a binder at a rate of 1.8 mL / min, and stirring at 65°C and 350 rpm for 30 minutes; continuing to add a corrosion inhibitor and a green tea extract, stirring at 65°C and 350 rpm for 60 minutes to form a first solution;

[0051] Step S2, adding the antifreeze solution to the second part of the solution, stirring at 55° C. and 400 rpm for 30 min to form a second solution;

[0052] Step S3, stirring the first solution and the second solution at 60° C. and 350 rpm for 45 min to prepare an environmentally friendly antifreeze and dust suppressant.

[0053] Example 2

[0054] The difference from Example 1 is that

[0055] Among the surfactants, the contents of polyoxyethylene laurate (9) and alkyl glycoside are different, and the weight ratio of the two is 1:1, as shown in Table 1.

[0056] Example 3

[0057] The difference from Example 1 is that the antifreeze content is different, see Table 1 for details.

[0058] Examples 4 to 5

[0059] The difference from Example 1 is that the overall mass content of the surfactant is different, see Table 1 for details.

[0060] Examples 6 to 7

[0061] The difference from Example 1 is that the overall mass content of the binder is different, see Table 1 for details.

[0062] Examples 8 to 9

[0063] The difference from Example 1 is that the overall mass content of the corrosion inhibitor is different.

[0064] Example 10

[0065] The components of environmentally friendly antifreeze and dust suppressant are shown in Table 1.

[0066] Step S1, adding a surfactant to the first part of the solvent, stirring at 60°C and 350 rpm for 30 minutes, then slowly adding a binder at a rate of 2 mL / min, and stirring at 60°C and 350 rpm for 45 minutes; continuing to add a corrosion inhibitor and a green tea extract, stirring at 65°C and 400 rpm for 30 minutes to form a first solution;

[0067] Step S2, adding the antifreeze solution to the second part of the solution, stirring at 55° C. and 350 rpm for 30 min to form a second solution;

[0068] Step S3, stirring the first solution and the second solution at 55° C. and 350 rpm for 60 min to prepare an environmentally friendly antifreeze and dust suppressant.

[0069] Embodiment 11

[0070] The components of environmentally friendly antifreeze and dust suppressant are shown in Table 1.

[0071] Step S1, adding a surfactant to the first part of the solvent, stirring at 55° C. and 350 rpm for 45 min, then slowly adding a binder at a rate of 2 mL / min, and stirring at 60° C. and 350 rpm for 30 min; continuing to add a corrosion inhibitor and a green tea extract, stirring at 60° C. and 350 rpm for 60 min, to form a first solution;

[0072] Step S2, adding the antifreeze solution to the second part of the solution, stirring at 55° C. and 400 rpm for 30 min to form a second solution;

[0073] Step S3, stirring the first solution and the second solution at 55° C. and 400 rpm for 60 min to prepare an environmentally friendly antifreeze and dust suppressant.

[0074] Examples 12 to 13

[0075] The difference from Example 1 is that the contents of green tea extract and antifreeze agent are different, see Table 1 for details.

[0076] Comparative Example 1

[0077] The only difference from Example 1 is that no antifreeze is contained.

[0078] Since the comparative example does not contain antifreeze, it cannot remain liquid at low temperatures, resulting in poor film-forming and adhesion properties of the dust suppressant in a low-temperature environment, and poor dust suppression effect.

[0079] Comparative Example 2

[0080] The only difference from Example 1 is that no green tea extract is contained.

[0081] Since this comparative example does not contain green tea extract, it lacks the adhesion and film-forming effects enhanced by polyhydroxy groups, resulting in decreased adhesion and film-forming stability of the dust suppressant. The dust suppressant without green tea extract has weak dust adsorption performance, poor antioxidant properties, and unsatisfactory moisturizing effect. It also has a high metal corrosion rate, a low grass seed germination rate, and poor environmental performance.

[0082] Comparative Example 3

[0083] The only difference from Example 1 is that no corrosion inhibitor is contained.

[0084] Because this comparative example does not contain corrosion inhibitors and lacks adsorption and precipitation protection, the protective layer formed by the dust suppressant on the metal surface is unstable and has poor corrosion resistance, which makes it more likely to cause corrosion damage to the equipment and reduce the service life of the equipment.

[0085] Comparative Example 4

[0086] The only difference from Example 1 is that the environmentally friendly additive is gallic acid.

[0087] The comparative example lacks the adhesion and film-forming effects enhanced by the polyhydroxy groups, resulting in poor adhesion and film-forming stability of the dust suppressant, and the gallic acid-containing dust suppressant emits a pungent odor, which is harmful to human health.

[0088] The performance test results of the environmentally friendly antifreeze and dust suppressant prepared in the above examples and comparative examples are shown in Table 2.

[0089] Test method:

[0090] Anti-corrosion performance: According to JB / T7901-2023 "Metal Material Laboratory Uniform Corrosion Full Immersion Test Method", the metal corrosion of different dust suppression agents to Q235 iron is tested;

[0091] Environmental performance: Under the conditions of 25°C and 65% relative humidity, the germination rate of Leymus chinensis seeds after spraying with different environmentally friendly antifreeze and dust suppressants was tested;

[0092] Dust suppression performance: Use a dust suppression vehicle to spray dust suppression agents on the test site at a spraying rate of 0.6L / m 2 , detect the dust concentration at the beginning and after spraying, and calculate the dust suppression efficiency of the dust suppressant.

[0093] Table 1

[0094]

[0095]

[0096] Table 2

[0097]

[0098]

[0099] Comparing Example 1 and Example 2, it can be seen that compared with polyoxyethylene laurate (9), alkyl glycoside has stronger hydrophilicity. When the weight ratio of polyoxyethylene laurate (9) to alkyl glycoside is adjusted to 1:1, it will affect the overall hydrophilicity of the dust suppressant, as well as the distribution and effectiveness of the antifreeze agent, causing the freezing point to rise, affecting the liquid state of the dust suppressant in a low-temperature environment; moreover, the increase in the content of alkyl glycoside will increase the surface activity and permeability of the solution, which will to a certain extent increase the wettability of the dust suppressant on the metal surface, thereby increasing the contact opportunity with the corrosive medium on the metal surface of the mechanical equipment, and affecting the metal corrosion; in addition, since alkyl glycoside has a strong hydrophilicity, the increase in its proportion will improve the initial wetting effect, but the film-forming performance is worse than that of polyoxyethylene laurate (9), and the dust suppression efficiency is improved in the initial stage, but the durability will be affected, especially under high temperature or strong wind conditions, which will affect the stability of the dust suppression layer.

[0100] By comparing Example 1 with Examples 3, 12 and 13, it can be seen that, due to the synergistic effect between the selected antifreeze component and other components (such as green tea extract), when the content of the antifreeze component changes, the overall efficacy of the dust suppressant will be affected to a certain extent.

[0101] By comparing Example 1 with Examples 4 and 5, it can be seen that when the surfactant content is low, on the one hand, the dispersion of the antifreeze agent is affected, making the solution easy to stratify or form solid precipitation at low temperatures, resulting in an increase in the freezing point, affecting low-temperature use; on the other hand, the stability of the protective film on the metal surface is affected, thereby affecting the isolation effect on the corrosive medium; moreover, it will also affect the uniformity of the distribution of the dust suppressant in the soil and the wetting effect, thereby affecting the germination rate and growth conditions of the grass seeds; further, it will also affect the wetting and film-forming effects of the dust suppressant, causing the dust suppressant to be evenly adjusted on the dust particles, thereby affecting the dust suppression efficiency.

[0102] High concentrations of surfactants will increase the alkalinity of the solution, aggravate the corrosion of metal materials of on-site equipment, and lead to increased metal corrosion under long-term exposure. Higher concentrations of surfactants will cause certain irritation to plant seeds, inhibit the normal germination of seeds, and thereby reduce the germination rate of grass seeds. Higher concentrations of surfactants can improve wettability, but can also lead to unstable dust suppression effects due to excessive foaming or uneven film formation, and are prone to falling off in strong winds or high temperatures, and have average weather resistance.

[0103] By comparing Example 1 with Examples 6 and 7, it can be seen that the binder content is related to the integrity and continuity of the film layer, thereby affecting the covering effect of the dust suppressant at low temperatures, the protective performance on the surface of mechanical equipment and the germination rate of grass seeds, and also affecting the adhesion on dust particles.

[0104] By comparing Example 1 with Examples 8 and 9, it can be seen that although the low concentration of the corrosion inhibitor has little effect on the freezing point, the insufficient corrosion inhibition effect may weaken the protective effect of the dust suppressant on the metal surface in a low-temperature environment, thereby affecting the stability of the equipment under cold conditions. In this case, the metal surface is more susceptible to corrosion, especially in an acidic environment or an environment containing corrosive media, the corrosion rate of the metal may accelerate. In addition, although the direct effect of low-concentration corrosion inhibitors on the germination rate of grass seeds may not be significant, in the long run, due to insufficient corrosion inhibition, more corrosive substances may accumulate in the soil when metal equipment leaks, indirectly affecting the growth of grass seeds.

[0105] As for dust suppression efficiency, low concentrations of corrosion inhibitors may not directly affect their performance, but due to insufficient corrosion inhibition, they may affect the long-term stability of the equipment, thereby indirectly reducing the overall efficiency of the dust suppression operation. Properly increasing the concentration of corrosion inhibitors can enhance the protective effect of the metal surface and effectively reduce corrosiveness. However, the adjustment of the concentration requires fine control to avoid the corrosion inhibitor from forming an excessively thick film layer on the metal surface, which may affect the uniformity of the metal surface. This embodiment can ensure that the metal surface is uniformly protected while avoiding the occurrence of local pitting or uneven corrosion.

[0106] In addition, the concentration of the corrosion inhibitor also has a certain effect on the germination rate of plant seeds. This embodiment can reduce the chemical irritation to plant seeds, thereby maintaining the normal germination rate of grass seeds. The concentration of the corrosion inhibitor will also affect the viscosity and fluidity of the dust suppressant. At an appropriate concentration, the dust suppressant can be evenly distributed on the surface of dust particles, thereby improving the dust suppression effect. At the same time, the appropriate concentration of the corrosion inhibitor helps the dust suppressant to form a uniform film under high temperature or strong wind environment, maintaining the stable performance of the dust suppressant.

[0107] Compared with the comparative example, the embodiments of the present invention can improve the environmental performance, durability and biodegradability of the environmentally friendly antifreeze dust suppressant by introducing the natural ingredient green tea extract into the environmentally friendly antifreeze dust suppressant. In addition, the green tea extract can cooperate with other components to make the dust suppressant have good adhesion effect, film-forming stability, antifreeze performance and wetting performance, and can maintain a good dust suppression effect under low temperature conditions, effectively avoiding the waste of water resources and road icing problems, and can reduce the risk of environmental pollution.

[0108] The dust suppression efficiency of the dust suppressant of the present invention on the total dust can reach more than 93%, and the dust suppression effect is remarkable; by comparing the freezing points of the embodiment with comparative example 1 and other comparative examples, it can be found that the addition of antifreeze components in the dust suppressant of the present invention can effectively reduce the negative temperature resistance of the dust suppressant; by the grass seed germination rates of the embodiment with comparative example 2 and other comparative examples, it can be known that the addition of the environmentally friendly additive, i.e., green tea extract, in the dust suppressant of the present invention can effectively reduce the biological harmfulness of the dust suppressant preparation, further proving that it has strong environmental protection performance; by the metal corrosion of the embodiment with comparative example 3 and other comparative examples, it can be known that the addition of corrosion inhibitor components in the dust suppressant of the present invention can effectively improve the corrosion resistance of the dust suppressant preparation.

[0109] In addition, it can be seen that when the process parameters are within the preferred range of the present invention, the comprehensive effect of the dust suppressant is better.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An environmentally friendly antifreeze dust suppressant, characterized in that: Includes surfactants, binders, antifreeze agents, corrosion inhibitors, green tea extract and solvents.

2. The environmentally friendly antifreeze dust suppressant according to claim 1, characterized in that: The green tea extract includes one or more of catechin compounds, flavonoid compounds, flavonol compounds, anthocyanidin compounds and phenolic acid compounds.

3. The environmentally friendly antifreeze dust suppressant according to claim 2, characterized in that: The catechin extract includes one or more of catechin, epicatechin, gallocatechin, epigallocatechin, catechin gallate, epicatechin gallate, gallocatechin gallate and epigallocatechin gallate; and / or, The flavonoids include one or more of quercetin, rutin, apigenin and genistein; and / or, The flavonol compounds include one or more of myricetin, myricetin, morin and morin; and / or, The anthocyanidin compound includes one or more of cyanidin, delphinidin, pelargonidin and peonidin; and / or, The phenolic acid compounds include one or more of caffeic acid, vanillic acid and p-hydroxybenzoic acid.

4. The environmentally friendly antifreeze dust suppressant according to any one of claims 1 to 3, characterized in that: Calculated by weight percentage, the green tea extract accounts for 0.05-0.15% of the environmentally friendly antifreeze and dust suppressant.

5. The environmentally friendly antifreeze dust suppressant according to any one of claims 1 to 4, characterized in that: The environmentally friendly antifreeze and dust suppressant comprises, by weight percentage: 0.2-2% of the surfactant, 0.05-0.5% of the binder, 20-30% of the antifreeze agent, 0.002-0.008% of the corrosion inhibitor, 0.05-0.1% of the green tea extract and the balance of the solvent; Preferably, the weight ratio of the green tea extract to the antifreeze agent is (0.0025-0.0045):1; Preferably, the total weight percentage of the green tea extract and the antifreeze agent accounts for 22.32-30.1% of the environmentally friendly antifreeze and dust suppressant.

6. The environmentally friendly antifreeze dust suppressant according to any one of claims 1 to 5, characterized in that: The surfactant comprises one or more of polyoxyethylene laurate (9), alkyl glycoside, sodium dodecylbenzene sulfonate and polyacrylamide; preferably, the surfactant comprises polyoxyethylene laurate (9) and alkyl glycoside, and the weight ratio of the two is (1-2):1; preferably, the HLB value of the surfactant is 10-15; and / or, The binder comprises one or more of polyacrylic acid, polyvinyl alcohol, sodium carboxymethyl cellulose, polyacrylamide, guar gum, sodium lauryl sulfate and sodium lactate; and / or, The antifreeze agent includes one or more of ethylene glycol, glycerol, methanol, ethanol and calcium chloride; and / or, The corrosion inhibitor comprises one or more of polyaspartic acid, glycine and cysteine; and / or, The solvent includes one or more of water, polyvinyl alcohol, water-soluble starch and sodium borate.

7. The environmentally friendly antifreeze dust suppressant according to any one of claims 1 to 6, characterized in that: The freezing point of the environmentally friendly antifreeze and dust suppressant is ≤-11°C, the metal corrosion is ≤0.018mm / a, and the grass seed germination rate is ≥79%; and / or, The dust suppression efficiency of the environmentally friendly antifreeze dust suppressant is ≥94%.

8. The method for preparing the environmentally friendly antifreeze and dust suppressant according to any one of claims 1 to 7, characterized in that: The following steps are involved: The surfactant, the binder, the antifreeze agent, the corrosion inhibitor, the green tea extract and the solvent are mixed to obtain the environmentally friendly antifreeze and dust suppressant.

9. The preparation method according to claim 8, characterized in that: dividing the solvent into two parts, namely a first solvent and a second solvent; Step S1, performing a first mixing of the surfactant and the first solvent, then adding the binder for a second mixing, and then adding the corrosion inhibitor and the green tea extract for a third mixing to obtain a first solution; Step S2, performing a fourth mixing of the antifreeze agent and the second solvent to obtain a second solution; Step S3, performing a fifth mixing of the first solution and the second solution to obtain the environmentally friendly antifreeze and dust suppressant.

10. The preparation method according to claim 9, characterized in that: The weight ratio of the first solvent to the second solvent is (0.05-0.1):1; and / or, Independently, the first mixing, the second mixing, the third mixing, the fourth mixing and the fifth mixing are performed at a rotation speed of 350 to 500 rpm, a time of 30 to 60 min, and a temperature of 55 to 80° C.; and / or, The binder is added at a rate of 1.8 to 2.5 mL / min; and / or, The pH value of the environmentally friendly antifreeze and dust suppressant is 6.5-7.1.

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