Environment-friendly dust suppression and dust fall coal dust suppressant

Abstract

The invention provides an environment-friendly dust suppression and dust fall coal dust suppressant which comprises the following components in parts by weight: 20-40 parts of sodium carboxyethyl cellulose, 12-24 parts of sodium hydroxypropyl starch, 8-16 parts of purified diatomite, 1-4 parts of a surfactant, 2-8 parts of polyacrylamide, 4-10 parts of sodium sulfate, 1-4 parts of a defoaming agent, 1-4 parts of a film-forming agent and 30-50 parts of water. The preparation method is simple, the prepared coal dust suppressant is sprayed on the surface of coal, a layer of shell protection film can be formed on the surface of the coal, the effects of dust falling and dust suppression are achieved, operation implementation is facilitated, the environmental protection requirement is met, and good social benefits and economic benefits are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of preparation of coal dust suppressants, and in particular to an environmentally friendly dust suppressant for coal dust suppression. Background Art

[0002] Coal dust generated during coal transportation is a major source of dust pollution. In my country, coal is transported in open wagons. During transportation, factors such as bumps, wind, and pressure differences cause coal particles to fly into the air, polluting the environment.

[0003] The traditional way to deal with coal dust pollution is to cover the coal car with tarpaulin or spray water on the coal car. These methods have solved the problem of coal dust flying during the coal pulling process to a certain extent, but there are still some shortcomings. For example, the tarpaulin used to cover the surface of the coal car may be blown away or broken during the operation of the vehicle; for another example, when spraying water on the coal car, the water is easy to evaporate in summer and freeze in winter, resulting in poor coal dust suppression effect, so it is difficult to promote and apply it on a large scale for a long time.

[0004] In order to make up for the shortcomings of traditional dust suppression methods, coal dust suppressants came into being. The current coal dust suppressants have high usage costs and the dust suppression effect is not obvious. Therefore, it is necessary to improve them. Summary of the invention

[0005] The present application provides an environmentally friendly dust suppression and dust reduction coal dust suppressant to solve the problem of poor dust suppression effect of dust suppressants in the prior art, and realizes the ability to form a shell-preserving film on the surface of coal, thereby playing the role of dust reduction and dust suppression.

[0006] The present application provides an environmentally friendly dust suppression and dust reduction coal dust suppressant, wherein the components of the coal dust suppressant include, by weight, 20-40 parts of sodium carboxyethyl cellulose, 12-24 parts of sodium carboxypropyl starch, 8-16 parts of purified diatomaceous earth, 1-4 parts of surfactant, 2-8 parts of polyacrylamide, 4-10 parts of sodium sulfate, 1-4 parts of defoaming agent, 1-4 parts of film-forming agent and 30-50 parts of water.

[0007] Preferably, the coal dust suppressant components include 30 parts of sodium carboxyethyl cellulose, 18 parts of sodium carboxypropyl starch, 12 parts of purified diatomaceous earth, 3 parts of surfactant, 5 parts of polyacrylamide, 7 parts of sodium sulfate, 3 parts of defoaming agent, 3 parts of film-forming agent and 45 parts of water in parts by weight.

[0008] Preferably, the surfactant is a mixture of one or more of sodium dodecylbenzene sulfonate, sodium dodecyl sulfate or octadecyl phosphate.

[0009] Preferably, the defoaming agent is a mixture of one or more of alkyl silicone oil, alcohols, castor oil, palm oil and oleic acid.

[0010] Preferably, the film-forming agent is composed of nano-silica sol, hydroxyl acrylic resin aqueous dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano-silica sol contains titanium dioxide particles.

[0011] Preferably, a method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant comprises the following steps:

[0012] A. Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, heat and stir to obtain a mixture A;

[0013] B. Then, add purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water to mixture A, and gelatinize for 25 min to 35 min under water bath conditions to obtain mixture B;

[0014] C. Add a surfactant and a defoamer to the mixture B, stir and mix thoroughly at room temperature, and let stand for 40 min to 60 min to obtain a mixture C;

[0015] D. Add a film-forming agent to mixture C, heat the mixture and stir it, and finally slowly cool it to room temperature to obtain a coal dust suppressant.

[0016] Preferably, in step A, the heating temperature is 70° C.-80° C., and the heating time is 20 min-30 min.

[0017] Preferably, in step C, the stirring rate is 1200-2400 rpm and the stirring time is 40 min-60 min.

[0018] Preferably, in step D, the stirring temperature is 45° C.-55° C., the stirring rate is 800-1200 rpm, and the stirring time is 18 min-28 min.

[0019] Beneficial effects: The preparation method of the present invention is simple. The prepared coal dust suppressant is sprayed on the surface of coal to form a shell-protecting film on the surface of coal, which plays a role in dust reduction and dust suppression, is convenient for operation, meets environmental protection requirements, and has good social and economic benefits; the film-forming agent added in the present invention can form a protective film on the surface of coal, which can effectively prevent dust from being dispersed, thereby reducing the interference of dust on the vision of pedestrians and drivers. This protective film can stably fix the dust on the surface of the coal, further enhance the dust suppression effect, and effectively improve the air environment.

[0020] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application is clearly and completely described below.

[0025] The present application provides an environmentally friendly dust suppression and dust reduction coal dust suppressant, wherein the components of the coal dust suppressant include, by weight, 20-40 parts of sodium carboxyethyl cellulose, 12-24 parts of sodium carboxypropyl starch, 8-16 parts of purified diatomaceous earth, 1-4 parts of surfactant, 2-8 parts of polyacrylamide, 4-10 parts of sodium sulfate, 1-4 parts of defoaming agent, 1-4 parts of film-forming agent and 30-50 parts of water.

[0026] Embodiment 1:

[0027] The components of the coal dust suppressant include 20 parts of sodium carboxyethyl cellulose, 12 parts of sodium carboxypropyl starch, 8 parts of purified diatomaceous earth, 1 part of surfactant, 2 parts of polyacrylamide, 4 parts of sodium sulfate, 1 part of defoaming agent, 1 part of film-forming agent and 30 parts of water in parts by weight.

[0028] In this embodiment, the surfactant is sodium dodecylbenzene sulfonate.

[0029] In this embodiment, the defoaming agent is alkyl silicone oil.

[0030] In this embodiment, the film-forming agent is composed of nano-silica sol, hydroxyl acrylic resin aqueous dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano-silica sol contains titanium dioxide particles.

[0031] In this embodiment, a method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant comprises the following steps:

[0032] A. Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, heat and stir to obtain a mixture A;

[0033] B. Then, purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water were added to the mixture A, and gelatinized for 25 minutes under water bath conditions to obtain a mixture B;

[0034] C. Add a surfactant and a defoamer to mixture B, stir and mix thoroughly at room temperature, and let stand for 40 minutes to obtain mixture C;

[0035] D. Add a film-forming agent to mixture C, heat the mixture and stir it, and finally slowly cool it to room temperature to obtain a coal dust suppressant.

[0036] In this embodiment, the heating temperature in step A is 70° C. and the heating time is 20 min.

[0037] In this embodiment, the stirring rate in step C is 1200 rpm and the time is 40 min.

[0038] In this embodiment, in step D, the stirring temperature is 45° C., the stirring rate is 800 rpm, and the stirring time is 18 min.

[0039] Embodiment 2:

[0040] The coal dust suppressant components include 40 parts of sodium carboxyethyl cellulose, 24 parts of sodium carboxypropyl starch, 16 parts of purified diatomaceous earth, 4 parts of surfactant, 8 parts of polyacrylamide, 10 parts of sodium sulfate, 4 parts of defoaming agent, 4 parts of film-forming agent and 50 parts of water in parts by weight.

[0041] In this embodiment, the surfactant is sodium dodecyl sulfate.

[0042] In this embodiment, castor oil is used as the defoaming agent.

[0043] In this embodiment, the film-forming agent is composed of nano-silica sol, hydroxyl acrylic resin aqueous dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano-silica sol contains titanium dioxide particles.

[0044] In this embodiment, a method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant comprises the following steps:

[0045] A. Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, heat and stir to obtain a mixture A;

[0046] B. Then, purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water were added to the mixture A, and gelatinized for 35 minutes under water bath conditions to obtain a mixture B;

[0047] C. Add a surfactant and a defoamer to mixture B, stir and mix thoroughly at room temperature, and let stand for 60 minutes to obtain mixture C;

[0048] D. Add a film-forming agent to mixture C, heat the mixture and stir it, and finally slowly cool it to room temperature to obtain a coal dust suppressant.

[0049] In this embodiment, the heating temperature in step A is 80° C. and the heating time is 30 min.

[0050] In this embodiment, the stirring rate in step C is 2400 rpm and the time is 60 min.

[0051] In this embodiment, in step D, the stirring temperature is 55° C., the stirring rate is 1200 rpm, and the stirring time is 28 min.

[0052] Embodiment three:

[0053] The components of the coal dust suppressant include 22 parts of sodium carboxyethyl cellulose, 14 parts of sodium carboxypropyl starch, 10 parts of purified diatomaceous earth, 2 parts of surfactant, 3 parts of polyacrylamide, 5 parts of sodium sulfate, 2 parts of defoaming agent, 2 parts of film-forming agent and 32 parts of water in parts by weight.

[0054] In this embodiment, the surfactant is octadecyl phosphate.

[0055] In this embodiment, the defoaming agent is a mixture of palm oil and oleic acid.

[0056] In this embodiment, the film-forming agent is composed of nano-silica sol, hydroxyl acrylic resin aqueous dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano-silica sol contains titanium dioxide particles.

[0057] In this embodiment, a method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant comprises the following steps:

[0058] A. Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, heat and stir to obtain a mixture A;

[0059] B. Then, purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water were added to the mixture A, and gelatinized for 26 minutes under water bath conditions to obtain a mixture B;

[0060] C. Add a surfactant and a defoamer to mixture B, stir and mix thoroughly at room temperature, and let stand for 44 minutes to obtain mixture C;

[0061] D. Add a film-forming agent to mixture C, heat the mixture and stir it, and finally slowly cool it to room temperature to obtain a coal dust suppressant.

[0062] In this embodiment, the heating temperature in step A is 72° C. and the heating time is 22 min.

[0063] In this embodiment, the stirring rate in step C is 1300 rpm and the time is 45 min.

[0064] In this embodiment, in step D, the stirring temperature is 46° C., the stirring rate is 900 rpm, and the stirring time is 20 min.

[0065] Embodiment 4:

[0066] The components of the coal dust suppressant include 36 parts of sodium carboxyethyl cellulose, 22 parts of sodium carboxypropyl starch, 14 parts of purified diatomaceous earth, 3 parts of surfactant, 7 parts of polyacrylamide, 9 parts of sodium sulfate, 3 parts of defoaming agent, 3 parts of film-forming agent and 46 parts of water in parts by weight.

[0067] In this embodiment, the surfactant is a mixture of sodium dodecylbenzene sulfonate and sodium dodecyl sulfate.

[0068] In this embodiment, the defoaming agent is a mixture of alkyl silicone oil and alcohols.

[0069] In this embodiment, the film-forming agent is composed of nano-silica sol, hydroxyl acrylic resin aqueous dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano-silica sol contains titanium dioxide particles.

[0070] In this embodiment, a method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant comprises the following steps:

[0071] A. Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, heat and stir to obtain a mixture A;

[0072] B. Then, purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water were added to the mixture A, and gelatinized for 28 minutes under water bath conditions to obtain a mixture B;

[0073] C. Add a surfactant and a defoamer to mixture B, stir and mix thoroughly at room temperature, and let stand for 48 minutes to obtain mixture C;

[0074] D. Add a film-forming agent to mixture C, heat the mixture and stir it, and finally slowly cool it to room temperature to obtain a coal dust suppressant.

[0075] In this embodiment, the heating temperature in step A is 74° C. and the heating time is 24 min.

[0076] In this embodiment, the stirring rate in step C is 1400 rpm and the time is 48 min.

[0077] In this embodiment, in step D, the stirring temperature is 48° C., the stirring rate is 900 rpm, and the stirring time is 22 min.

[0078] Embodiment five:

[0079] The components of the coal dust suppressant include 38 parts of sodium carboxyethyl cellulose, 22 parts of sodium carboxypropyl starch, 15 parts of purified diatomaceous earth, 3 parts of surfactant, 7 parts of polyacrylamide, 8 parts of sodium sulfate, 3 parts of defoaming agent, 3 parts of film-forming agent and 48 parts of water in parts by weight.

[0080] In this embodiment, the surfactant is a mixture of sodium dodecylbenzene sulfonate and octadecyl phosphate.

[0081] In this embodiment, the defoaming agent is a mixture of castor oil and palm oil.

[0082] In this embodiment, the film-forming agent is composed of nano-silica sol, hydroxyl acrylic resin aqueous dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano-silica sol contains titanium dioxide particles.

[0083] In this embodiment, a method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant comprises the following steps:

[0084] A. Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, heat and stir to obtain a mixture A;

[0085] B. Then, purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water were added to the mixture A, and gelatinized for 32 minutes under water bath conditions to obtain a mixture B;

[0086] C. Add a surfactant and a defoamer to mixture B, stir and mix thoroughly at room temperature, and let stand for 58 minutes to obtain mixture C;

[0087] D. Add a film-forming agent to mixture C, heat the mixture and stir it, and finally slowly cool it to room temperature to obtain a coal dust suppressant.

[0088] In this embodiment, the heating temperature in step A is 78° C. and the heating time is 27 min.

[0089] In this embodiment, the stirring rate in step C is 2300 rpm and the time is 57 min.

[0090] In this embodiment, in step D, the stirring temperature is 52° C., the stirring rate is 1100 rpm, and the stirring time is 25 min.

[0091] Embodiment six:

[0092] The components of the coal dust suppressant include 34 parts of sodium carboxyethyl cellulose, 20 parts of sodium carboxypropyl starch, 10 parts of purified diatomaceous earth, 2 parts of surfactant, 6 parts of polyacrylamide, 6 parts of sodium sulfate, 2 parts of defoaming agent, 3 parts of film-forming agent and 42 parts of water in parts by weight.

[0093] In this embodiment, the surfactant is a mixture of sodium dodecylbenzene sulfonate and sodium dodecyl sulfate.

[0094] In this embodiment, the defoaming agent is a mixture of alkyl silicone oil and palm oil.

[0095] In this embodiment, the film-forming agent is composed of nano-silica sol, hydroxyl acrylic resin aqueous dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano-silica sol contains titanium dioxide particles.

[0096] In this embodiment, a method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant comprises the following steps:

[0097] A. Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, heat and stir to obtain a mixture A;

[0098] B. Then, purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water were added to the mixture A, and gelatinized for 32 minutes under water bath conditions to obtain a mixture B;

[0099] C. Add a surfactant and a defoamer to mixture B, stir and mix thoroughly at room temperature, and let stand for 52 minutes to obtain mixture C;

[0100] D. Add a film-forming agent to mixture C, heat the mixture and stir it, and finally slowly cool it to room temperature to obtain a coal dust suppressant.

[0101] In this embodiment, the heating temperature in step A is 76° C. and the heating time is 26 min.

[0102] In this embodiment, the stirring rate in step C is 2000 rpm and the time is 52 min.

[0103] In this embodiment, in step D, the stirring temperature is 49° C., the stirring rate is 1100 rpm, and the stirring time is 20 min.

[0104] Embodiment seven:

[0105] The components of the coal dust suppressant include 30 parts of sodium carboxyethyl cellulose, 18 parts of sodium carboxypropyl starch, 12 parts of purified diatomaceous earth, 3 parts of surfactant, 5 parts of polyacrylamide, 7 parts of sodium sulfate, 3 parts of defoaming agent, 3 parts of film-forming agent and 45 parts of water in parts by weight.

[0106] In this embodiment, the surfactant is a mixture of sodium dodecylbenzene sulfonate and sodium dodecyl sulfate.

[0107] In this embodiment, the defoaming agent is a mixture of alkyl silicone oil, castor oil, palm oil and oleic acid.

[0108] In this embodiment, the film-forming agent is composed of nano-silica sol, hydroxyl acrylic resin aqueous dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano-silica sol contains titanium dioxide particles.

[0109] In this embodiment, a method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant comprises the following steps:

[0110] A. Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, heat and stir to obtain a mixture A;

[0111] B. Then, purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water were added to the mixture A, and gelatinized for 30 minutes under water bath conditions to obtain a mixture B;

[0112] C. Add a surfactant and a defoamer to mixture B, stir and mix thoroughly at room temperature, and let stand for 50 minutes to obtain mixture C;

[0113] D. Add a film-forming agent to mixture C, heat the mixture and stir it, and finally slowly cool it to room temperature to obtain a coal dust suppressant.

[0114] In this embodiment, the heating temperature in step A is 75° C. and the heating time is 25 min.

[0115] In this embodiment, the stirring rate in step C is 1800 rpm and the time is 50 min.

[0116] In this embodiment, in step D, the stirring temperature is 50° C., the stirring rate is 1000 rpm, and the stirring time is 22 min.

[0117] Experimental example:

[0118] The dust suppressants prepared by various embodiments of the present invention were used to perform performance tests, and the data obtained are shown in the following table:

[0119] Compressive strength(Kpa) Wind erosion resistance (%) Embodiment 1 230 0.73 Embodiment 2 235 0.71 Embodiment 3 245 0.71 Embodiment 4 235 0.64 Embodiment 5 240 0.72 Embodiment 6 255 0.80 Embodiment 7 260 0.82

[0120] In summary, the preparation method of the present invention is simple, and the prepared coal dust suppressant is sprayed on the surface of coal to form a shell-protecting film on the surface of coal, which plays a role in dust reduction and dust suppression, is convenient for operation, meets environmental protection requirements, and has good social and economic benefits; the film-forming agent added in the present invention can form a protective film on the surface of coal, which can effectively prevent the dispersion of dust, thereby reducing the interference of dust on the vision of pedestrians and drivers. This protective film can stably fix the dust on the surface of the coal, further enhance the dust suppression effect, and effectively improve the air environment.

[0121] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An environmentally friendly dust suppression and dust reduction coal dust suppressant, characterized in that: The coal dust suppressant comprises the following components by weight: 20-40 parts of sodium carboxyethyl cellulose, 12-24 parts of sodium carboxypropyl starch, 8-16 parts of purified diatomaceous earth, 1-4 parts of surfactant, 2-8 parts of polyacrylamide, 4-10 parts of sodium sulfate, 1-4 parts of defoaming agent, 1-4 parts of film-forming agent and 30-50 parts of water.

2. An environmentally friendly dust suppression and dust reduction coal dust suppressant according to claim 1, characterized in that: The coal dust suppressant components include, by weight: 30 parts of sodium carboxyethyl cellulose, 18 parts of sodium carboxypropyl starch, 12 parts of purified diatomaceous earth, 3 parts of surfactant, 5 parts of polyacrylamide, 7 parts of sodium sulfate, 3 parts of defoaming agent, 3 parts of film-forming agent and 45 parts of water.

3. The environmentally friendly dust suppression and dust reduction coal dust suppressant according to claim 1, characterized in that: The surfactant is a mixture of one or more of sodium dodecylbenzene sulfonate, sodium dodecyl sulfate or octadecyl phosphate.

4. The environmentally friendly dust suppression and dust reduction coal dust suppressant according to claim 1, characterized in that: The defoamer is a mixture of one or more of alkyl silicone oil, alcohols, castor oil, palm oil and oleic acid.

5. The environmentally friendly dust suppression and dust reduction coal dust suppressant according to claim 1, characterized in that: The film-forming agent is composed of nano silica sol, hydroxyl acrylic resin water dispersion, PVA solution and cross-linking agent glutaraldehyde, and the nano silica sol contains titanium dioxide particles.

6. A method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant as claimed in claim 1, characterized in that: The preparation method comprises the following steps: Step A: Mix sodium carboxyethyl cellulose and sodium carboxypropyl starch and add them into a mixing tank, add 1 / 2 water, mix thoroughly, and heat and stir to obtain a mixture A; Step B: Then, adding purified diatomaceous earth, polyacrylamide, sodium sulfate and remaining water to mixture A, gelatinizing for 25 min to 35 min under water bath conditions to obtain mixture B; Step C: adding a surfactant and a defoaming agent to the mixture B, stirring and mixing the mixture at room temperature, and standing the mixture for 40 min to 60 min to obtain a mixture C; Step D: adding a film-forming agent to the mixture C, heating the mixture and stirring it, and finally slowly cooling it to room temperature to obtain a coal dust suppressant.

7. The method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant according to claim 6, characterized in that: In step A, the heating temperature is 70° C.-80° C., and the heating time is 20 min-30 min.

8. The method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant according to claim 6, characterized in that: In step C, the stirring rate is 1200-2400 rpm and the stirring time is 40 min-60 min.

9. The method for preparing an environmentally friendly dust suppression and dust reduction coal dust suppressant according to claim 6, characterized in that: In the step D, the stirring temperature is 45° C.-55° C., the stirring rate is 800-1200 rpm, and the stirring time is 18 min-28 min.