Dust suppressant for railway transportation of bulk granular goods

Abstract

The invention discloses a dust suppressant for railway transportation of bulk granular goods and a preparation method of the dust suppressant, and relates to the technical field of dust suppressants. The dust suppressant for railway transportation of bulk granular goods comprises the following raw material components in parts by weight: 9-10 parts of magnesium lithium silicate organic modified bentonite, 45-52 parts of modified cassava pregelatinized starch, 3-5 parts of a defoaming agent, 26-32 parts of calcium carbonate powder, 3-6 parts of a water-retaining agent, 4-6 parts of a preservative and 2-3 parts of a corrosion inhibitor. After being sprayed, the dust suppressant for railway transportation of bulk granular goods is high in strength, good in wetting permeability, large in permeation thickness and high in dust suppression efficiency, and secondary spraying is not needed in the transportation process.

Description

[0001] This application is a divisional application of a patent application entitled "A dust suppressant for railway transportation of bulk granular goods and its preparation method", the application date of the original application is November 18, 2022, and the application number is 202211446763.X Technical Field

[0002] The invention relates to the technical field of dust suppressants, and in particular to a dust suppressant for railway transportation of bulk granular goods. Background Art

[0003] Railway freight train transportation is a main mode of transportation in my country, with the characteristics of large transportation volume, fast speed, low cost, and no restrictions on climatic conditions. Coal, metal ore, metal ore powder, sand and gravel and other bulk particles are mainly transported by railway freight trains. During transportation, they often encounter bumps caused by track facilities, wind pressure generated when trains cross, and instantaneous disturbed airflow when entering tunnels. These conditions can blow the powder loaded on the surface of the train away from the body and spill onto the road surface, causing coal dust pollution and cargo losses along the line.

[0004] In order to avoid the loss of bulk granular goods during transportation, dust suppressants are often used to prevent dust during transportation. Existing dust suppressants have poor strength, poor wetting permeability, and thin penetration thickness after spraying. In extreme climates such as continuous high temperature, severe cold, dryness, and heavy rainfall, the dust suppression shell will crack and break, causing dust problems during transportation. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a dust suppressant for railway transportation of bulk granular goods and a preparation method thereof. The invention solves the problem that the existing railway transportation of bulk granular goods is prone to dust in high temperature, severe cold and strong wind weather. The invention overcomes the dust problem caused by the insufficient strength and thickness of the existing dust suppressant after spraying.

[0006] One object of the present invention is to protect a dust suppressant for railway transportation of bulk granular goods, which comprises the following raw material components in parts by weight: 9-10 parts of lithium magnesium silicate organic modified bentonite, 45-52 parts of modified cassava pregelatinized starch, 3-5 parts of defoamer, 26-32 parts of calcium carbonate powder, 3-6 parts of water retaining agent, 4-6 parts of preservative, and 2-3 parts of corrosion inhibitor;

[0007] The preparation method of the lithium magnesium silicate organic modified bentonite comprises the following steps: mixing hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine to obtain a mixture A, adding water to the mixture A and stirring evenly, spraying the mixture on the lithium magnesium silicate bentonite, sealing and culturing, and drying to obtain the lithium magnesium silicate organic modified bentonite.

[0008] Preferably, the dust suppressant for railway transportation of bulk granular cargo comprises the following raw material components in parts by weight: 9.5 parts of lithium magnesium silicate organically modified bentonite, 48.5 parts of modified cassava pregelatinized starch, 4 parts of defoaming agent, 28 parts of calcium carbonate powder, 5 parts of water retaining agent, 4 parts of preservative, and 2.5 parts of corrosion inhibitor.

[0009] Preferably, the mesh size of the calcium carbonate powder is 400 mesh.

[0010] Preferably, the corrosion inhibitor is composed of siloxane ketone and ethyl-mercaptobenzothiazole in a weight ratio of 1:1.5.

[0011] Preferably, the water-retaining agent is sodium alginate.

[0012] Preferably, the preservative is sodium benzoate.

[0013] Preferably, the weight ratio of hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine is 1:2:1, and the weight ratio of the mixture A to water is 3:17; the sealed culture time is 24 hours; and the drying is carried out at 40-50°C with a stirring rate of 60-80rpm for 12-16 hours while stirring.

[0014] Another object of the present invention is to protect the preparation method of the above-mentioned dust suppressant for railway transportation of bulk granular goods, the steps are as follows:

[0015] S1. The lithium magnesium silicate organic modified bentonite, modified cassava pregelatinized starch, defoamer, calcium carbonate powder, water retaining agent, preservative and corrosion inhibitor were dispersed and stirred to obtain a mixture B;

[0016] S2. Add water to the mixture B and stir evenly to obtain the dust suppressant for railway transportation of bulk granular cargo.

[0017] Preferably, in step S1, the dispersion stirring is carried out at a rotation speed of 200-300 rpm for 1-2 hours.

[0018] Preferably, in step S2, the weight ratio of the mixture B to water is 1:100; and the stirring is performed uniformly at a rotation speed of 100-120 rpm for 2-3 hours.

[0019] The beneficial effects of the present invention are embodied in:

[0020] (1) The dust suppressant for railway transportation of bulk granular cargo provided by the present invention has high strength, good wet permeability, thick penetration thickness and high dust suppression efficiency after spraying.

[0021] (2) The dust suppressant for railway transportation of bulk granular cargo provided by the present invention has excellent performance in dealing with climates such as strong winds and dust in spring, hot summers, and severe cold winters. After use, it forms a crust with high hardness, high strength, and good toughness. It does not crack for a long time and has strong resistance to rain erosion.

[0022] (3) The magnesium lithium silicate organic modified bentonite used in the present invention uses hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide, and octadecylamine as organic modifiers to organically modify magnesium uranium silicate, thereby increasing its interlayer spacing, and its adsorption and suspension properties are better than those of traditional bentonite. The dust suppressant prepared by using the same is water-soluble and has a flocculated structure, which enhances the viscosity of the medium solution.

[0023] (4) The preparation method of the dust suppressant for railway transportation of bulk granular cargo provided by the present invention is simple to operate, has stable technology, and the obtained product has excellent performance and great promotion value. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present invention are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0025] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0026] Example 1

[0027] This embodiment provides a dust suppressant for railway transportation of bulk granular goods, comprising the following raw material components in parts by weight:

[0028] 9.5 parts of lithium magnesium silicate organic modified bentonite, 48.5 parts of modified cassava pregelatinized starch, 4 parts of defoamer, 28 parts of calcium carbonate powder, 5 parts of water retaining agent, 4 parts of preservative, and 2.5 parts of corrosion inhibitor.

[0029] The preparation method of lithium magnesium silicate organic modified bentonite comprises the following steps: mixing hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine to obtain a mixture A, adding water to the mixture A and stirring evenly, spraying the mixture on the lithium magnesium silicate bentonite, sealing and culturing, and drying to obtain the lithium magnesium silicate organic modified bentonite.

[0030] The weight ratio of hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine is 1:2:1; the weight ratio of mixture A and water is 3:17; the sealed culture time is 24 hours; and the drying is carried out at 45°C with a stirring rate of 70 rpm for 14 hours while stirring.

[0031] The mesh number of calcium carbonate powder is 400 mesh.

[0032] Modified cassava pregelatinized starch is produced by Ningjin County Jiahe Energy Saving Materials Co., Ltd.

[0033] The corrosion inhibitor consists of siloxane ketone and ethyl-mercaptobenzothiazole in a weight ratio of 1:1.5.

[0034] The water retaining agent is sodium alginate.

[0035] The preservative is sodium benzoate.

[0036] This embodiment also provides a method for preparing the above-mentioned dust suppressant for railway transportation of bulk granular goods, the steps are as follows:

[0037] S1. The lithium magnesium silicate organic modified bentonite, modified cassava pregelatinized starch, defoamer, calcium carbonate powder, water retaining agent, preservative and corrosion inhibitor were dispersed and stirred to obtain a mixture B;

[0038] S2. Add water to the mixture B and stir evenly to obtain the dust suppressant for railway transportation of bulk granular cargo.

[0039] In step S1, the dispersion stirring is performed at a rotation speed of 300 rpm for 2 hours.

[0040] In step S2, the weight ratio of mixture B to water is 1:100; the mixture is stirred evenly at a rotation speed of 120 rpm for 2.5 hours.

[0041] Example 2

[0042] This embodiment provides a dust suppressant for railway transportation of bulk granular goods, comprising the following raw material components in parts by weight:

[0043] 9 parts of lithium magnesium silicate organic modified bentonite, 45 parts of modified cassava pregelatinized starch, 3 parts of defoamer, 26 parts of calcium carbonate powder, 3 parts of water retaining agent, 5 parts of preservative, 2 parts of corrosion inhibitor;

[0044] The preparation method of lithium magnesium silicate organic modified bentonite comprises the following steps: mixing hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine to obtain a mixture A, adding water to the mixture A and stirring evenly, spraying the mixture on the lithium magnesium silicate bentonite, sealing and culturing, and drying to obtain the lithium magnesium silicate organic modified bentonite.

[0045] The weight ratio of hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine is 1:2:1; the weight ratio of mixture A and water is 3:17; the sealed culture time is 24 hours; and the drying is carried out at 45°C with a stirring rate of 70 rpm for 14 hours while stirring.

[0046] The mesh number of calcium carbonate powder is 400 mesh.

[0047] Modified cassava pregelatinized starch is produced by Ningjin County Jiahe Energy Saving Materials Co., Ltd.

[0048] The corrosion inhibitor consists of siloxane ketone and ethyl-mercaptobenzothiazole in a weight ratio of 1:1.5.

[0049] The water retaining agent is sodium alginate.

[0050] The preservative is sodium benzoate.

[0051] This embodiment also provides a method for preparing the above-mentioned dust suppressant for railway transportation of bulk granular goods, the steps are as follows:

[0052] S1. The lithium magnesium silicate organic modified bentonite, modified cassava pregelatinized starch, defoamer, calcium carbonate powder, water retaining agent, preservative and corrosion inhibitor were dispersed and stirred to obtain a mixture B;

[0053] S2. Add water to the mixture B and stir evenly to obtain the dust suppressant for railway transportation of bulk granular cargo.

[0054] In step S1, the dispersion stirring is performed at a rotation speed of 300 rpm for 2 hours.

[0055] In step S2, the weight ratio of mixture B to water is 1:100; the mixture is stirred evenly at a rotation speed of 120 rpm for 2.5 hours.

[0056] Example 3

[0057] This embodiment provides a dust suppressant for railway transportation of bulk granular goods, comprising the following raw material components in parts by weight:

[0058] 10 parts of lithium magnesium silicate organic modified bentonite, 52 parts of modified cassava pregelatinized starch, 5 parts of defoamer, 32 parts of calcium carbonate powder, 6 parts of water retaining agent, 6 parts of preservative, 3 parts of corrosion inhibitor;

[0059] The preparation method of lithium magnesium silicate organic modified bentonite comprises the following steps: mixing hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine to obtain a mixture A, adding water to the mixture A and stirring evenly, spraying the mixture on the lithium magnesium silicate bentonite, sealing and culturing, and drying to obtain the lithium magnesium silicate organic modified bentonite.

[0060] The weight ratio of hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine is 1:2:1; the weight ratio of mixture A and water is 3:17; the sealed culture time is 24 hours; and the drying is carried out at 45°C with a stirring rate of 70 rpm for 14 hours while stirring.

[0061] The mesh number of calcium carbonate powder is 400 mesh.

[0062] Modified cassava pregelatinized starch is produced by Ningjin County Jiahe Energy Saving Materials Co., Ltd.

[0063] The corrosion inhibitor consists of siloxane ketone and ethyl-mercaptobenzothiazole in a weight ratio of 1:1.5.

[0064] The water retaining agent is sodium alginate.

[0065] The preservative is sodium benzoate.

[0066] This embodiment also provides a method for preparing the above-mentioned dust suppressant for railway transportation of bulk granular goods, the steps are as follows:

[0067] S1. The lithium magnesium silicate organic modified bentonite, modified cassava pregelatinized starch, defoamer, calcium carbonate powder, water retaining agent, preservative and corrosion inhibitor were dispersed and stirred to obtain a mixture B;

[0068] S2. Add water to the mixture B and stir evenly to obtain the dust suppressant for railway transportation of bulk granular cargo.

[0069] In step S1, the dispersion stirring is performed at a rotation speed of 300 rpm for 2 hours.

[0070] In step S2, the weight ratio of mixture B to water is 1:100; the mixture is stirred evenly at a rotation speed of 120 rpm for 2.5 hours.

[0071] Test example

[0072] The dust suppressants for railway transportation of bulk granular cargo prepared in Examples 1-3 were tested for viscosity, surface tension, penetration time and penetration layer thickness.

[0073] Test results: See Table 1.

[0074] Table 1

[0075]

[0076] It can be seen from Table 1 that the dust suppressant for railway transportation of bulk granular cargo provided by the present invention has good wet permeability, thick penetration thickness and high dust suppression efficiency after spraying.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A dust suppressant for railway transportation of bulk granular cargo, characterized in that: The dust suppressant for railway transportation of bulk granular goods comprises the following raw material components in parts by weight: 9-10 parts of lithium magnesium silicate organic modified bentonite, 45-52 parts of modified cassava pregelatinized starch, 3-5 parts of defoaming agent, 26-32 parts of calcium carbonate powder, 3-6 parts of water retaining agent, 4-6 parts of preservative and 2-3 parts of corrosion inhibitor.

2. The dust suppressant for railway transportation of bulk granular cargo according to claim 1, characterized in that: The dust suppressant for railway transportation of bulk granular goods comprises the following raw material components in parts by weight: 9.5 parts of lithium magnesium silicate organic modified bentonite, 48.5 parts of modified cassava pregelatinized starch, 4 parts of defoaming agent, 28 parts of calcium carbonate powder, 5 parts of water retaining agent, 4 parts of preservative and 2.5 parts of corrosion inhibitor.

3. The dust suppressant for railway transportation of bulk granular cargo according to claim 1, characterized in that: The mesh number of the calcium carbonate powder is 400 meshes.

4. The dust suppressant for railway transportation of bulk granular cargo according to claim 1, characterized in that: The corrosion inhibitor is composed of siloxane ketone and ethyl-mercaptobenzothiazole in a weight ratio of 1:1.

5.

5. The dust suppressant for railway transportation of bulk granular cargo according to claim 1, characterized in that: The water retaining agent is sodium alginate.

6. The dust suppressant for railway transportation of bulk granular cargo according to claim 1, characterized in that: The preservative is sodium benzoate.

7. The dust suppressant for railway transportation of bulk granular cargo according to claim 1, characterized in that: The weight ratio of the hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine is 1:2:1, and the weight ratio of the mixture A and water is 3:17; the sealed culture time is 24 hours; and the drying is carried out at 40-50°C with a stirring rate of 60-80rpm for 12-16 hours while stirring.

8. The dust suppressant for railway transportation of bulk granular cargo according to claim 1, characterized in that: The preparation method of the lithium magnesium silicate organic modified bentonite comprises the following steps: mixing hexadecyltrimethylammonium bromide, hexadecylpyridinium bromide and octadecylamine to obtain a mixture A, adding water to the mixture A and stirring evenly, spraying the mixture on the lithium magnesium silicate bentonite, sealing and culturing, and drying to obtain the lithium magnesium silicate organic modified bentonite.

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