Polymer network dust suppressant as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of coal transportation, and particularly relates to a polymer network dust suppressant as well as a preparation method and application thereof. The invention provides a polymer network dust suppressant, which is prepared from the following preparation raw materials in parts by mass: 1 to 20 parts of seaweed liquid, 70 to 100 parts of montmorillonite powder, 5 to 15 parts of cellulose, 0.1 to 5 parts of sodium alginate, 0.1 to 5 parts of organic calcium source and 0.1 to 1 part of octenyl succinic acid modified starch, the organic calcium source is selected from calcium formate and / or calcium acetate, the seaweed liquid is obtained by extracting seaweed, and the montmorillonite powder is prepared from montmorillonite. The mass percentage content of alginic acid in the seaweed liquid is 10-20wt%. Compared with a dust suppressant disclosed in the prior art, the dust suppressant disclosed by the invention can form a caking layer with large bonding force and high strength, so that dust raising and scattering in the coal transportation process can be remarkably reduced, and the dust suppressant is suitable for popularization and application.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal transportation, and particularly relates to a polymer network dust suppressant, a preparation method and application thereof. BACKGROUND

[0002] Coal transportation refers to the process of transporting qualified coal to the destination, including ports, power plants and boiler rooms, etc., by means of railway, highway, coastal and inland water transportation, etc., after the coal is mined. At present, the commonly used coal transportation methods mainly include railway transportation and highway transportation. In the transportation process, due to the bumping caused by the roadbed, turnout and track facilities, the high-speed running speed of the train and the wind blowing, especially when the train enters a tunnel with a certain length, due to the effect of "piston wind", a strong instantaneous disturbance airflow is formed, which causes the coal powder on the surface of the coal loaded in the transportation tool (train or automobile) to scatter, resulting in not only the waste of energy, but also the serious environmental coal dust pollution problem.

[0003] The related technology discloses an environment-friendly dust suppressant, which comprises the following components in mass fraction: 100 parts of water, 0.2-1 parts of soluble dietary fiber, 0.1-0.5 parts of instant gelling agent, 0.1-0.5 g of non-ionic cellulose ether, and 0.01-0.2 parts of thickening anti-settling agent. The related technology also discloses a polymer network dust suppressant, which comprises the following preparation raw materials in mass fraction: 0.5-15 parts of seaweed liquid, 85-90 parts of montmorillonite powder, 5-10 parts of cellulose and 0.5-1 part of additive.

[0004] However, the inventors have found through experiments that the two dust suppressants have the problem of poor setting plate strength when used as coal dust suppressants, and cannot well reduce the dust raising and scattering in the coal transportation process. SUMMARY

[0005] The present application provides a polymer network dust suppressant, a preparation method and application thereof. The polymer network dust suppressant provided by the present application can form a setting plate layer with high bonding force and strength when used as a coal dust suppressant, thereby significantly reducing the dust raising and scattering in the coal transportation process, and is suitable for popularization and use.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: The present application provides a polymer network dust suppressant, which comprises the following preparation raw materials in mass fraction: 1-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, 0.1-5 parts of organic calcium source and 0.1-1 part of octenyl succinate starch. The organic calcium source is selected from calcium formate and / or calcium acetate. The seaweed liquid is obtained by extracting seaweed, and the mass percentage content of alginic acid in the seaweed liquid is 10-20 wt%.

[0007] Preferably, the organic calcium source has a mesh number of 1250-2000.

[0008] Preferably, the montmorillonite powder has a mesh number of 1250-2000.

[0009] The application provides a preparation method of the polymer network dust suppressant. The seaweed liquid, the montmorillonite powder, the sodium alginate, the organic calcium source, the cellulose and the octenyl succinate starch are mixed and reacted to obtain reaction materials. The reaction materials are dried to obtain the polymer network dust suppressant.

[0010] Preferably, the drying is microwave drying, the temperature of the drying is 100-105 DEG C, the water content of the polymer network dust suppressant is less than or equal to 10%, the drying obtains dried materials, and the dried materials are crushed to obtain the polymer network dust suppressant, and the particle size of the polymer network dust suppressant is less than or equal to 1 mm.

[0011] The application provides an application of the polymer network dust suppressant or the polymer network dust suppressant prepared by the preparation method.

[0012] Preferably, the application comprises the following steps: dissolving the polymer network dust suppressant in water to obtain a dust suppressant solution; and applying the dust suppressant solution to the surface of coal.

[0013] The application provides a polymer network dust suppressant, which comprises the following preparation raw materials in mass fractions: 1-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, 0.1-5 parts of an organic calcium source and 0.1-1 part of octenyl succinate starch, the organic calcium source is selected from calcium formate and / or calcium acetate, the seaweed liquid is obtained by extracting seaweed, and the mass percentage content of seaweed acid in the seaweed liquid is 10-20 wt%. First, the application combines the inorganic montmorillonite powder, the seaweed liquid and the cellulose, utilizes the reaction of the inorganic montmorillonite powder and seaweed acid in the seaweed liquid to form a seaweed acid silicon aluminum high molecular compound ((SiAlC6H8O6)n, wherein n is a positive integer, n=1, 2, 3, 4, 5, …), and utilizes the cross-linking reaction of the seaweed acid silicon aluminum high molecular compound and the cellulose to form a seaweed silicon aluminum fiber polymer ((C6H5·SiAlC6H8O6)n). n 10 O5·SiAlC6H8O6) n ​The solution obtained by the seaweed silicon aluminum fiber polymer meeting water has the characteristics of strong penetration and high viscosity. Second, the present application simultaneously compounding sodium alginate and organic calcium source, using the organic calcium source and sodium alginate to form sodium alginate-organic calcium source gel, the sodium alginate-organic calcium source gel has a dense 'egg box' structure, which reduces the porosity of the polymer network dust suppressant product when it is formed into a board, thereby improving the board strength of the dust suppressant board, after being applied to the surface of coal, it can form a board layer with high adhesion and strength, which can significantly reduce the dust and scattering during coal transportation. Third, the present application uses octenyl succinate starch (OSAS) as an additive, which forms a hydrophilic and hydrophobic structure by cross-linking with cellulose, and then cross-links with the seaweed silicon aluminum polymer compound and the sodium alginate-organic calcium source gel to form a more complex cross-linked network, so that the film strength of the polymer network dust suppressant board provided by the present application is greatly improved, which can further improve the adhesion and solidification board strength of the dust suppressant. The results of the examples show that the adhesion, penetration and board strength of the polymer network dust suppressant provided by the present application are significantly better than those of the dust suppressant products disclosed in the prior art.

[0014] Meanwhile, the polymer network dust suppressant provided by the present application uses organic calcium source, compared with the dust suppressant in the prior art which uses inorganic calcium source (commonly used calcium chloride), the polymer network dust suppressant provided by the present application has no Cl - residue in coal, and will not cause metal corrosion due to the accumulation of Cl - residue in the transportation of rails, carriages, combustion boilers, pipes and the like. Moreover, the cost of the polymer network dust suppressant provided by the present application is low, and the raw materials are easy to obtain. Therefore, the polymer network dust suppressant provided by the present application can prevent metal corrosion from occurring, and has a wider application value.

[0015] Meanwhile, the present application uses calcium formate and / or calcium acetate as the organic calcium source, and the obtained sodium alginate-organic calcium source gel structure has a relatively smooth surface and a larger wetting angle. At the same time, the carboxyl group of the organic calcium source is a hydrophilic group, which can make the polymer network dust suppressant disperse well in water, thereby improving the dispersibility of the dust suppressant in water. And because the sodium alginate-organic calcium source gel structure has strong water absorption and water retention performance, the polymer network dust suppressant provided by the present application can maintain a certain amount of water for a long time after use, thereby the polymer dust suppressant provided by the present application has high water retention rate, which can significantly prolong the dust suppression effect. DETAILED DESCRIPTION

[0016] The application provides a polymer network dust suppressant, which comprises the following raw materials in mass fraction: 1-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, and 0.1-1 part of octenyl succinate starch, wherein the organic calcium source is selected from calcium formate and / or calcium acetate, the seaweed liquid is extracted from seaweed, and the mass percentage of alginic acid in the seaweed liquid is 10-20 wt%.

[0017] In the application, all the raw materials / components are commercially available products known to those skilled in the art.

[0018] The application provides a polymer network dust suppressant, which comprises the following raw materials in mass fraction: 1-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, and 0.1-1 part of octenyl succinate starch, wherein the organic calcium source is selected from calcium formate and / or calcium acetate, the seaweed liquid is extracted from seaweed, and the mass percentage of alginic acid in the seaweed liquid is 10-20 wt%.

[0019] The application provides a polymer network dust suppressant, which comprises the following raw materials in mass fraction: 1-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, and 0.1-1 part of octenyl succinate starch, wherein the organic calcium source is selected from calcium formate and / or calcium acetate, the seaweed liquid is extracted from seaweed, and the mass percentage of alginic acid in the seaweed liquid is 10-20 wt%.

[0020] The application provides a polymer network dust suppressant, which comprises the following raw materials in mass fraction: 1-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, and 0.1-1 part of octenyl succinate starch, wherein the organic calcium source is selected from calcium formate and / or calcium acetate, the seaweed liquid is extracted from seaweed, and the mass percentage of alginic acid in the seaweed liquid is 10-20 wt%.

[0021] The application provides a polymer network dust suppressant, which comprises the following raw materials in mass fraction: 1-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, and 0.1-1 part of octenyl succinate starch, wherein the organic calcium source is selected from calcium formate and / or calcium acetate, the seaweed liquid is extracted from seaweed, and the mass percentage of alginic acid in the seaweed liquid is 10-20 wt%.

[0022] The preparation raw material of the polymer network dust suppressant provided by the present application includes 0.1-5 parts of organic calcium source, preferably 0.5-5 parts, and in the embodiments, it can be 0.5 parts, 1 part, 2 parts, 3 parts, 4 parts or 5 parts, based on the mass fraction of the seaweed liquid. In the present application, the organic calcium source is selected from calcium formate and / or calcium acetate, and in the embodiments, it can be calcium acetate. The mesh number of the organic calcium source is preferably 1250-2000 mesh, and specifically preferably 1250 mesh.

[0023] The present application uses sodium alginate and organic calcium source in combination. After the organic calcium source reacts with the sodium alginate, a clear “egg box” structure is formed, Ca 2+ The Ca is tightly surrounded by the sodium alginate M unit and G unit. The sodium alginate forms a stable “cage” structure from the previous chain structure, so that the molecular structure strength is significantly improved.

[0024] The present application researches and finds that, compared with inorganic calcium sources (calcium chloride, calcium carbonate, etc.), the structure formed by the organic calcium source and the sodium alginate in the present application is more compact, the porosity is lower, the mechanical properties of the “egg box” structure are stronger, and the overall structure mechanical strength is obviously improved.

[0025] The preparation raw material of the polymer network dust suppressant provided by the present application includes 0.1-1 parts of octenyl succinate starch, and in the embodiments, it can be 0.1 parts, 0.5 parts or 1 part, based on the mass fraction of the seaweed liquid. In the present application, the octenyl succinate starch (OSAS) is preferably prepared from starch and octenyl succinic anhydride (OSA) under weak alkaline conditions. In the specific embodiments of the present application, the OSAS is preferably prepared by referring to the method disclosed in “Synthesis of Octenyl Succinate Starch in Aqueous Phase and Its Reaction Kinetics” (Master's Degree Thesis of Guangxi University, Qin Wen).

[0026] The present application utilizes the good stability and emulsifying property of OSAS to improve the stability of the polymer network dust suppressant after preparation, prevent demulsification (layering), and at the same time, due to the hydrophobic and lipophilic nature of the octenyl group of octenyl succinate starch and the hydrophilic nature of the carboxyl group, the OSAS can well crosslink with cellulose to form a membrane structure with hydrophilic and hydrophobic properties, and then further crosslink with the sodium alginate silicon aluminum high molecular compound to form a more complex crosslinking network, so that the film forming strength is greatly improved. Moreover, the stability of the crosslinking network formed after the addition of octenyl succinate starch in the present application is greatly improved.

[0027] The present application provides a preparation method of the polymer network dust suppressant described in the above technical solution, which includes the following steps: The seaweed liquid, montmorillonite powder, sodium alginate, organic calcium source, cellulose and octenyl succinate starch are mixed and reacted to obtain a reaction material. The reaction material is dried to obtain the polymer network dust suppressant.

[0028] The seaweed liquid, the montmorillonite powder, the sodium alginate, the organic calcium source, the cellulose and the octenyl succinate starch are mixed to obtain a reaction material. The present application does not have special requirements for the order of the mixing. The temperature of the reaction is room temperature. In the present application, the montmorillonite powder reacts with the sodium alginate in the seaweed liquid, and the silicon aluminum ions in the montmorillonite powder react with the sodium alginate to generate seaweed silicon aluminum fiber polymer. The seaweed silicon aluminum fiber polymer crosslinks with the cellulose to generate seaweed silicon aluminum fiber polymer, forming a network structure.

[0029] In the present application, the octenyl succinate starch contains a hydrophilic group -COONa and a long-chain oil-wet group in its structure, so that the octenyl succinate starch has hydrophilic and lipophilic properties, can form a strong film at the oil-water interface, and can be used as a wall material to enhance the network structure, thereby improving the strength and mechanical stability of the network structure.

[0030] After obtaining the reaction material, the present application dries the reaction material to obtain the polymer network dust suppressant. In the present application, the drying is preferably microwave drying, and the drying temperature is preferably 100-105 DEG C. The water content of the polymer network dust suppressant is preferably ≤10%. In the present application, the drying obtains a dry material, and the present application preferably further comprises: crushing the dry material to obtain the polymer network dust suppressant, and the particle size of the polymer network dust suppressant is preferably ≤1mm.

[0031] The present application provides the application of the polymer network dust suppressant as described in the above technical solution or the polymer network dust suppressant prepared by the preparation method as described in the above technical solution as a coal transportation dust suppressant.

[0032] In the present application, the application preferably comprises the following steps: dissolving the polymer network dust suppressant in water to obtain a dust suppressant solution; and applying the dust suppressant solution to the surface of the coal. The water used when the polymer network dust suppressant is dissolved in water is preferably deionized water. In industrial applications, the water is preferably tap water, river water or well water. The mass percentage content of the polymer network dust suppressant in the dust suppressant solution is preferably 1-10%, and more preferably 1%. The application is preferably spraying. The application amount of the dust suppressant solution is preferably 1.5-2.5 L / m 2 .

[0033] The polymer network dust suppressant provided by the application has a synergistic reaction when encountering water, and generates high viscosity, and is sprayed on the surface of a coal layer: through testing and comparison, the adhesion, penetration and plate strength are all better than those of the dust suppressant for railway coal transportation currently used in China. Moreover, the polymer network dust suppressant provided by the application has low cost and raw materials are easy to obtain.

[0034] In order to further illustrate the application, the technical solutions provided by the application are described in detail below in combination with examples, but they should not be understood as limiting the protection scope of the application.

[0035] The dust suppressant products prepared in the following examples and comparative examples are used according to TB / T3210.1.2020 Dust Suppressant for Railway Coal Transportation Part 1: Dust Suppressant Standard Use Method.

[0036] The dust suppressant products prepared in the following examples and comparative examples are used according to TB / T3210.1.2020 Dust Suppressant for Railway Coal Transportation Part 1: Dust Suppressant Standard Use Method.

[0037] In the following examples and comparative examples, "parts" refer to "mass parts". The mesh number of the montmorillonite powder used in the following examples is 1250 mesh. The mesh number of the calcium acetate used in the following examples and comparative examples is 1250 mesh.

[0038] Example 1: Step 1: Prepare the following mass parts of raw materials: seaweed liquid (the mass percentage of alginic acid in the seaweed liquid is 18wt%) 10 parts, montmorillonite powder 90 parts, cellulose 10 parts, sodium alginate 2 parts, calcium acetate 2 parts, octenyl succinate starch 0.5 parts, and deionized water 99 parts.

[0039] Step 2: Add the seaweed liquid, montmorillonite powder, sodium alginate, calcium acetate, cellulose and octenyl succinate starch into the stirring kettle, mix and react under room temperature conditions to obtain a reaction material.

[0040] Step 3: Turn on the microwave dryer, control the temperature at 105℃, dry the reaction material obtained in step 2 to less than 10% moisture, crush, separate the material with a particle size of ≤1mm, package, and obtain the polymer network dust suppressant.

[0041] The dust suppression experiment effect of the polymer network dust suppressant prepared in this example: At the Shaanxi Xiangdao Railway Spray Station, 1 part of the polymer network dust suppressant prepared in Example 1 was dissolved into a dust suppressant solution with 99 parts of deionized water, and was sprayed on 70 carriages of coal, and the spraying amount of the dust suppressant solution was 1.8~2.2L / m 2 . After 12 hours of spraying, the plate strength was tested by an NK-50 pressure gauge, and the plate strength was 3680g / cm².

[0042] The water retention rate of the node plate structure after 72 hours was 70%. The water retention rate was determined by drying at 105°C for 24 hours. After the mass no longer changed, the difference between the mass before and after drying was divided by the mass before drying, and the result was multiplied by 100% to obtain the water retention rate.

[0043] The polymer dust suppressant prepared in Example 1 was dissolved in water to form a 1% aqueous solution, and the initial viscosity was 65 mpa·s. After 7 days of standing, the viscosity increased from 65 mpa·s to 75 mpa·s, and remained for more than 15 days. The main reason is that the stability of the cross-linked network formed after adding octenyl succinate starch is greatly improved. Instrument: NDJ-1 rotary viscometer.

[0044] Comparative Example 1: Step 1: Prepare the following mass parts of raw materials: seaweed liquid (the mass percentage of alginic acid in the seaweed liquid is 18wt%) 10 parts, montmorillonite powder 90 parts, cellulose 10 parts, viscous seaweed glue 0.5 parts, and deionized water 99 parts.

[0045] Step 2: Add seaweed liquid 10 parts, montmorillonite powder 90 parts, and viscous seaweed glue 0.5 parts to the stirred tank, start the high-shear homogenization pump, and homogenize for 30 minutes to disperse uniformly.

[0046] Step 3: Continue to add cellulose 10 parts to the stirred tank in Step 2, start stirring for 30 minutes, mix uniformly, and obtain the reaction material.

[0047] Step 4: Start the microwave dryer, control the temperature at 105°C, dry the reaction material obtained in Step 3 to a moisture content of less than 10%, crush, and separate the material with a particle size of ≤1mm, package, and obtain the polymer dust suppressant.

[0048] Dust suppression experiment effect of the polymer dust suppressant prepared in this comparative example: At the spray station of Shaanxi Xiangdao Railway, 1 part of the polymer dust suppressant prepared in Comparative Example 1 was dissolved in 99 parts of deionized water to form a dust suppressant solution, which was sprayed on 70 carriages of coal, and the spraying amount of the dust suppressant solution was 1.8~2.2L / m 2 . After 12 hours of spraying, the node plate strength was tested by NK-50 pressure gauge, which was 3080g / cm², The water retention rate of the node plate structure after 72 hours was 50%.

[0049] Comparative Example 2: This comparative example prepared an environmentally friendly dust suppressant according to the content disclosed in Example 1 of Chinese Patent CN117363321A: Select 0.4 g konjac powder dissolved in 100 g water, stir evenly, respectively, 0.35 g of seaweed gel, marked as 2#, then take 0.2 g of methyl cellulose and 0.1 g of starch in turn, under the condition of 1500 r / min, stirring for 20 min, to get the environment-friendly dust suppressant, marked as 2#.

[0050] The dust suppression experiment effect of the polymer dust suppressant prepared in the present comparative example is as follows: At the spraying station of Shaanxi Xiangdao railway, 1 part of the polymer dust suppressant prepared in comparative example 1 was dissolved into dust suppressant solution with 99 parts of deionized water, and was sprayed to 70 carriages of coal, the spraying amount of the dust suppressant solution was 1.8~2.2 L / m 2 . After spraying for 12 hours, the NK-50 type pressure gauge was used for testing, the strength of the coagulation plate was 2580 g / cm², At the same time, the water retention rate of the coagulation plate structure was measured after 72 h, which was 50%.

[0051] Comparative example 3: The formula of the dust suppressant provided in the present comparative example is basically the same as that of example 1, except that the octenyl succinate starch in example 1 is replaced by gelatinized starch.

[0052] The dust suppression experiment effect of the polymer dust suppressant prepared in the present comparative example is as follows: At the spraying station of Shaanxi Xiangdao railway, 1 part of the polymer dust suppressant prepared in comparative example 1 was dissolved into dust suppressant solution with 99 parts of deionized water, and was sprayed to 70 carriages of coal, the spraying amount of the dust suppressant solution was 1.8~2.2 L / m 2 . After spraying for 12 hours, the NK-50 type pressure gauge was used for testing, the strength of the coagulation plate was 3080 g / cm², At the same time, the water retention rate of the coagulation plate structure was measured after 72 h, which was 60%.

[0053] Comparative example 4: The formula of the dust suppressant provided in the present comparative example is basically the same as that of example 1, except that the mass fraction of calcium acetate in example 1 is set to 20 parts.

[0054] The dust suppression experiment effect of the polymer dust suppressant prepared in the present comparative example is as follows: At the spraying station of Shaanxi Xiangdao railway, 1 part of the polymer dust suppressant prepared in comparative example 1 was dissolved into dust suppressant solution with 99 parts of deionized water, and was sprayed to 70 carriages of coal, the spraying amount of the dust suppressant solution was 1.8~2.2 L / m 2 . After spraying for 12 hours, the NK-50 type pressure gauge was used for testing, the strength of the coagulation plate was 1280 g / cm², At the same time, the water retention rate of the coagulation plate structure was measured after 72 h, which was 10%.

[0055] Comparative example 5: The formulation of the dust suppressant provided in Example 1 is basically the same, except that the mass fraction of the octenyl succinate starch in Example 1 is set to 15 parts.

[0056] Dust suppression experiment effect of the polymer dust suppressant prepared in the present comparative example: At a spraying station of Shaanxi Xiangdao Railway, 1 part of the polymer dust suppressant prepared in Comparative Example 5 was dissolved into a dust suppressant solution with 99 parts of deionized water, and the dust suppressant solution was sprayed on 70 carriages of coal, with a spraying amount of 1.8-2.2 L / m 2 After spraying for 12 hours, the plate strength was tested by using an NK-50 pressure gauge, and the plate strength was 580 g / cm², The water retention rate of the plate structure was also measured, and the water retention rate was 0% after 72 hours.

[0057] As can be seen from the above examples, the present application provides a polymer network dust suppressant, 5-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, 0.1-5 parts of organic calcium source, and 0.1-1 part of octenyl succinate starch. The seaweed liquid is extracted from seaweed, and the mass percentage of alginate in the seaweed liquid is 10-20 wt%. In the present application, inorganic montmorillonite powder, seaweed liquid and cellulose are used together, and the main component of the seaweed liquid, alginate, reacts with the inorganic montmorillonite powder to form a silico-aluminum alginate high polymer compound. The silico-aluminum alginate high polymer compound is crosslinked with the cellulose to form a seaweed silico-aluminum fiber polymer. The solution obtained by adding water to the seaweed silico-aluminum fiber polymer has the characteristics of strong penetration and high viscosity. At the same time, the present application uses the organic calcium source and the sodium alginate to form a sodium alginate-organic calcium source gel, which has a dense "egg box" structure, reducing the porosity of the polymer network dust suppressant product when it is formed into a plate, thereby improving the plate strength of the dust suppressant plate. After being applied to the surface of coal, it can form a plate layer with high adhesion and strength, which can significantly reduce the dust and scattering during coal transportation. Furthermore, the present application uses octenyl succinate starch (OSAS) as an additive, which is crosslinked with the cellulose to form a structure with hydrophilic and hydrophobic properties, and is crosslinked with the silico-aluminum alginate high polymer compound and the sodium alginate-organic calcium source gel at the same time to form a more complex crosslinked network. The plate film strength of the polymer network dust suppressant provided by the present application is greatly improved, and the adhesion and solidification plate strength of the dust suppressant are further improved. The results of the examples show that the adhesion, penetration and plate strength of the polymer network dust suppressant provided by the present application are significantly better than those of the dust suppressant products disclosed in the prior art.

[0058] Although the above embodiments have been described in detail, it should be understood that these are only some embodiments of the present application, but not all embodiments, and other embodiments can be obtained without creativity on the basis of the above embodiments, and these embodiments all belong to the protection scope of the present application.

Claims

1. A polymer network dust suppressant, characterized in that: The invention comprises the following raw materials in parts by weight: 1-20 parts of seaweed liquid, 70-100 parts of montmorillonite powder, 5-15 parts of cellulose, 0.1-5 parts of sodium alginate, 0.1-5 parts of an organic calcium source, and 0.1-1 part of octenyl succinate starch ester, wherein the organic calcium source is selected from calcium formate and / or calcium acetate. The seaweed liquid is extracted from seaweed, and the mass percentage of alginic acid in the seaweed liquid is 10-20wt%.

2. The polymer network dust suppressant according to claim 1, characterized in that The mesh size of the organic calcium source is 1250-2000 mesh.

3. The polymer network dust suppressant according to claim 1, characterized in that The mesh number of the montmorillonite powder is 1250-2000 mesh.

4. The method for preparing the polymer network dust suppressant according to any one of claims 1 to 3, characterized in that: The following steps are involved: mixing seaweed liquid, montmorillonite powder, sodium alginate, an organic calcium source, cellulose and octenyl succinate starch to react and obtain a reaction material; The reaction material is dried to obtain the polymer network dust suppressant.

5. The preparation method according to claim 4, characterized in that The drying is microwave drying, and the drying temperature is 100~105℃; the moisture content of the polymer network dust suppressant is ≤10%; the drying obtains a dry material, and also includes: crushing the dry material to obtain the polymer network dust suppressant, and the particle size of the polymer network dust suppressant is ≤1mm.

6. Use of the polymer network dust suppressant according to any one of claims 1 to 3 or the polymer network dust suppressant prepared by the preparation method according to claim 4 or 5 as a dust suppressant for coal transportation.

7. The use according to claim 6, characterized in that The application comprises the following steps: dissolving the polymer network dust suppressant in water to obtain a dust suppressant solution; and applying the dust suppressant solution to the surface of coal.