CN114539976B - Crust moisturizing dust suppressant and preparation method and application thereof - Google Patents
Crust moisturizing dust suppressant and preparation method and application thereof Download PDFInfo
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- CN114539976B CN114539976B CN202210258451.XA CN202210258451A CN114539976B CN 114539976 B CN114539976 B CN 114539976B CN 202210258451 A CN202210258451 A CN 202210258451A CN 114539976 B CN114539976 B CN 114539976B
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- 239000000428 dust Substances 0.000 title claims abstract description 94
- 230000003020 moisturizing effect Effects 0.000 title claims abstract description 9
- 238000002360 preparation method Methods 0.000 title abstract description 10
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 33
- MRUAUOIMASANKQ-UHFFFAOYSA-N cocamidopropyl betaine Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O MRUAUOIMASANKQ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 33
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 33
- 239000000661 sodium alginate Substances 0.000 claims abstract description 33
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 31
- 229920002472 Starch Polymers 0.000 claims abstract description 30
- 239000001110 calcium chloride Substances 0.000 claims abstract description 30
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 30
- 229940073507 cocamidopropyl betaine Drugs 0.000 claims abstract description 30
- 235000019698 starch Nutrition 0.000 claims abstract description 30
- 239000008107 starch Substances 0.000 claims abstract description 30
- 239000003245 coal Substances 0.000 claims abstract description 25
- 229940080313 sodium starch Drugs 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 18
- 229940032147 starch Drugs 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000004484 Briquette Substances 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 229960002713 calcium chloride Drugs 0.000 abstract description 2
- 235000011148 calcium chloride Nutrition 0.000 abstract description 2
- 230000036541 health Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 13
- 230000001629 suppression Effects 0.000 description 11
- 230000014759 maintenance of location Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000010408 film Substances 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 235000010493 xanthan gum Nutrition 0.000 description 3
- 239000000230 xanthan gum Substances 0.000 description 3
- 229920001285 xanthan gum Polymers 0.000 description 3
- 229940082509 xanthan gum Drugs 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002280 amphoteric surfactant Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- MPOKJOWFCMDRKP-UHFFFAOYSA-N gold;hydrate Chemical compound O.[Au] MPOKJOWFCMDRKP-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/22—Materials not provided for elsewhere for dust-laying or dust-absorbing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a crust moisturizing dust suppressant, which comprises calcium chloride, sodium alginate, starch and cocamidopropyl betaine. The invention also discloses a preparation method of the dust suppressant and application of the dust suppressant in suppressing dust of coal piles or gangue piles. By spraying the dust suppressant, the scattering of dust can be reduced, and the occupational health of operators is ensured.
Description
Technical Field
The invention relates to the technical field of dust fall and dust removal materials, in particular to a crust moisturizing dust suppressant, a preparation method and application thereof.
Background
Dust is brought into the atmosphere by wind force, and is one of the main causes of atmospheric pollution.
Dust emission inevitably occurs in both gangue piles and coal briquette piles during the coal mine production. The key to solving the dust pollution problem is to control the generation of flying dust. Gangue is rock that is mixed together with organic and inorganic compounds that are co-deposited with coal during the coal formation process, typically in thin layers and present in the coal seam or in the top and bottom of the coal seam. Gangue is mainly divided into clay rock, sandstone rock, carbonate and aluminum rock. The gangue is fused and a large amount of CO and CO are discharged 2 、SO 2 、H 2 S and NOx, and the like.
Therefore, dust generated by the gangue pile needs to be restrained, but the gangue pile placed in the natural environment is easy to dry, the action and effect of a common water spraying mode are not obvious, and humidity is difficult to keep after water spraying. Through literature and practical research, chemical dust suppression is novel, high in dust suppression efficiency and long in dust suppression time compared with other dust suppression methods. Therefore, it is necessary to provide a crust moisture-preserving dust suppressant which can effectively solve the dust emission problem in the coal mine production process.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a crust moisturizing dust suppressant, a preparation method and application thereof. The problem of dust pollution of gangue pile and coal briquette pile in the prior art is solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect the invention relates to a crusting moisturizing dust suppressant comprising calcium chloride, sodium alginate, starch and cocamidopropyl betaine.
In the crust moisturizing dust suppressant provided by the invention, the physical and chemical properties of the gangue pile and the coal block pile, in particular the gangue pile, are comprehensively considered, and the crust moisturizing dust suppressant comprises the following components:
calcium chloride as an anti-evaporation agent ensures the wettability of a protection object by utilizing the water-retaining property of the calcium chloride, and can reduce the rapid evaporation of water. When the humidity is lower than the dew point, the humidity in the calcium chloride condensed air keeps the gangue pile continuously moist, and the gangue is prevented from cracking and disintegrating after water absorption and re-weathering.
The cocamidopropyl betaine serving as a surfactant can reduce the surface tension of water, promote the combination of a solution and dust, and inhibit the diffusion of the dust. Cocamidopropyl betaine is a substance that causes a significant change in the interfacial state of a solution system. Has immobilized hydrophilic and lipophilic groups, and can be oriented on the surface of the solution. The commonly used surfactant is polyvinyl sodium sulfonate surfactant, but the ionic substance has a large effect of inhibiting water evaporation. Cocamidopropyl betaine is an amphoteric surfactant which has good compatibility with anionic, cationic and nonionic surfactants and also has a thickening effect. The coal gangue is accumulated in an open-air field throughout the year, acidic water is generated after the coal gangue is subjected to rain erosion, and the cocoamidopropyl betaine is very stable in the acidic environment and the outdoor low-temperature environment in winter, so that the formula can better exert the surface activity of the cocoamidopropyl betaine.
Sodium alginate and starch as crusting agents can cover dust to form a shell structure, so that dust flying is effectively controlled. The sodium alginate and the starch are used for the surface of a material pile, and after the surface of the material pile is air-dried, a layer of shell formed and the materials tied together exist continuously, so that the wind-proof effect is achieved. The shape of the gangue is different, the sodium alginate and starch composite film has better tensile force and elongation at break, and under the action of gravity, the composite film can be uniformly covered on the surface of the gangue pile, has better sealing property after being formed into a shell, and can slow down the oxidative cracking of the gangue.
In a preferred embodiment of the invention, the dust suppressant consists of the following components in percentage by weight, which total amounts to 100%: 25-35% of calcium chloride, 0.1-0.2% of sodium alginate, 0.05-0.07% of starch, 0.005-0.007% of cocamidopropyl betaine and the balance of water. In a preferred embodiment of the invention, calcium chloride is used in an amount of, for example, 30%, sodium alginate is used in an amount of, for example, 0.15%, starch is used in an amount of, for example, 0.06%, cocamidopropyl betaine is used in an amount of, for example, 0.006%.
It is further preferred that the amount of calcium chloride used can be determined based on the temperature of the environment of use and the length of time of illumination; the dosage of sodium alginate and starch can be selected according to the protection time and the disturbance degree; the amount of cocamidopropyl betaine may be selected according to the object of protection.
The proportion of each component of the dust suppressant is not determined at will, but is determined finally through repeated experiments, and has important influence on the performance, crusting performance and moisture retention performance of the dust suppressant. If the dosage of each component is unreasonable, the dust suppression effect, the wind resistance effect and the moisture retention performance of the dust suppressant cannot reach higher levels. The dust suppressant effect is considered, and meanwhile, the manufacturing cost is considered, so that the practicability is ensured.
In a preferred embodiment of the invention, the sodium alginate is in the form of a granular powder.
In another aspect, the present invention relates to a method for preparing the dust suppressant, comprising the steps of:
a) Adding calcium chloride and cocamidopropyl betaine into water, mixing and stirring uniformly to obtain a mixed solution;
b) And C, adding sodium alginate and starch into the mixed solution obtained in the step A, and continuously stirring until the mixture is uniformly mixed to obtain the dust suppressant.
In a preferred embodiment of the invention, the stirring speed in step B is greater than the stirring speed in step a.
In a more preferred embodiment of the invention, the stirring speed in step A is in the range of 0.1-0.8r/s, for example 0.5r/s; the stirring speed in step B is 0.5-2.0r/s, for example 1r/s.
In another aspect the invention relates to the use of a dust suppressant as described above or as obtained by the above process for the inhibition of dust build-up from a coal or gangue pile.
In a preferred embodiment of the present invention, the dust suppressant has a use density of not less than 1L/m 2 。
In another aspect the invention relates to a method of inhibiting dust from a coal or gangue pile comprising spraying the dust suppressant described above or obtained by the preparation method described above, optionally diluted, onto the surface of the gangue pile or the surface of the coal pile.
In a preferred embodiment of the present invention, the dust suppressant spray density is not less than 1L/m 2 。
Compared with the prior art, the invention has the beneficial effects that:
(1) In the crust-forming moisture-preserving dust suppressant, calcium chloride in the dust suppressant is an anti-evaporation agent, so that the rapid evaporation of water is reduced, and the dry cracking is prevented; sodium alginate and starch are crusting agents, can cover dust to form a shell structure, and effectively control dust flying; the cocamidopropyl betaine is a surfactant, can reduce the surface tension of water, promote the combination of a solution and dust, and inhibit the diffusion of the dust; as will be seen from the examples and comparative examples below, the three components of the dust suppressant of the present invention produce a significant synergistic effect;
(2) The dust suppressant can be used for gangue piles or coal block piles, and dust scattering is reduced by spraying the dust suppressant, so that occupational health of operators is ensured;
(3) The preparation method and the using method of the dust suppressant are simple and feasible, and particularly have better using effects in coal block piles and gangue piles;
(4) When used in coal block piles and gangue piles, the water-retaining agent has excellent moisture retention rate, dust suppression rate and crusting effect.
Detailed Description
The present invention will be further described in detail with reference to examples, but the present invention is not limited thereto.
Raw materials
Calcium chloride: anhydrous calcium chloride produced by the metallocene chemical reagent factory in Tianjin is selected to be white cubic crystallization, porous frit or particles.
Sodium alginate: sodium alginate produced by the company of chemical reagent of Chinese medicine group is selected and used as white or light yellow powder.
Starch: edible corn starch is selected.
Cocamidopropyl betaine: the cocoamidopropyl betaine produced by Guangzhou scion chemical industry Co is selected to be a yellowish low-viscosity liquid.
Polyacrylamide: the polyacrylamide produced by Henan gold water treatment material Co., ltd is selected to be white powder or granule, and the pH value is 10-14.
Xanthan gum: the xanthan gum produced by Husky Biochemical Co., ltd is in white or light yellow powder form and has strong hydrophilicity.
Sodium dodecyl sulfonate: sodium dodecyl sulfonate produced by Tianjin chemical reagent Co., ltd is white or light yellow crystal or powder.
Test method
The moisture retention, dust suppression and crusting effect were determined by the following methods:
spraying dust suppressant onto the surface of gangue pile with spraying density of 2L/m 2 。
Moisture retention rate: pouring gangue sample with particle size of 0.63-1.42 mm into a disk culture dish to spray 2L/m 2 And uniformly spraying dust suppressant solution with the volume ratio of 2:100 on the surface layer of the gangue sample for a measuring unit, and testing the mass loss of the coal sample every 5 hours. The formula for calculating the moisture retention rate is as follows:
η＝[(M i -M 1 )/M 2 ]×100％
wherein: η is the moisture retention; m is M 1 The initial mass of the coal sample, g; m is M i G, drying the quality of the coal sample every 5 hours after spraying water; m is M 2 G is the mass of the sprayed tap water.
Dust suppression rate: preparing dust suppressant solutions with different mass concentrations, weighing 50mL of the dust suppressant solution in a colorimetric tube, weighing 0.05g of anthracite coal dust (sieving with a 200-mesh sieve), placing in the colorimetric tube, shaking uniformly, standing for a certain time, sucking the upper layer solution, measuring light transmittance at 734nm of visible light wavelength by using a visible light spectrophotometer, and expressing the dust suppression rate by using the light transmittance.
Crusting effect: the sprayed film sample was folded into several layers, the film thickness was measured by a screw micrometer at different points, and the average value was taken 5 times in μm.
Cutting the film into thin film strips with the thickness of 40mm multiplied by 10mm, measuring the tensile stress and the tensile strain of the film by a texture analyzer, setting the speed of 120mm/min before measurement, measuring 60mm/min, measuring 120mm/min after measurement, and obtaining the tensile strength and the fracture growth rate according to a stress-strain curve.
Examples
Example 1
The dust suppressant amounted to 1Kg, containing 0.29Kg of calcium chloride, 0.0015Kg of sodium alginate, 0.0005Kg of starch, 0.00006Kg of cocamidopropyl betaine, and the balance water. Adding calcium chloride and cocamidopropyl betaine into water, stirring at a speed of 0.5r/s until the mixture is uniform, adding sodium alginate and starch, and stirring at a speed of 1r/s until the mixture is uniform, thereby obtaining the dust suppressant.
Example 2
The dust suppressant amounted to 1Kg, containing 0.35Kg of calcium chloride, 0.001Kg of sodium alginate, 0.0005Kg of starch, 0.00006Kg of cocamidopropyl betaine and the balance of water. Adding calcium chloride and cocamidopropyl betaine into water, stirring at a speed of 0.5r/s until the mixture is uniform, adding sodium alginate and starch, and stirring at a speed of 1r/s until the mixture is uniform, thereby obtaining the dust suppressant.
Example 3
The dust suppressant amounted to 1Kg, containing 0.25Kg of calcium chloride, 0.002Kg of sodium alginate, 0.0007Kg of starch, 0.00006Kg of cocamidopropyl betaine, and the balance water. Adding calcium chloride and cocamidopropyl betaine into water, stirring at a speed of 0.5r/s until the mixture is uniform, adding sodium alginate and starch, and stirring at a speed of 1r/s until the mixture is uniform, thereby obtaining the dust suppressant.
Example 4
The dust suppressant amounted to 1Kg, containing 0.25Kg of calcium chloride, 0.002Kg of sodium alginate, 0.0007Kg of starch, 0.00007Kg of cocamidopropyl betaine, and the balance water. Adding calcium chloride and cocamidopropyl betaine into water, stirring at a speed of 0.5r/s until the mixture is uniform, adding sodium alginate and starch, and stirring at a speed of 1r/s until the mixture is uniform, thereby obtaining the dust suppressant.
Example 5
The dust suppressant amounted to 1Kg, containing 0.25Kg of calcium chloride, 0.002Kg of sodium alginate, 0.0007Kg of starch, 0.00007Kg of cocamidopropyl betaine, and the balance water. Adding calcium chloride and cocamidopropyl betaine into water, stirring at a speed of 0.5r/s until the mixture is uniform, adding sodium alginate and starch, and stirring at a speed of 1r/s until the mixture is uniform, thereby obtaining the dust suppressant.
Example 6
The dust suppressant amounted to 1Kg, containing 0.25Kg of calcium chloride, 0.001Kg of sodium alginate, 0.0005Kg of starch, 0.00006Kg of cocamidopropyl betaine and the balance of water. Adding calcium chloride and cocamidopropyl betaine into water, stirring at a speed of 0.5r/s until the mixture is uniform, adding sodium alginate and starch, and stirring at a speed of 1r/s until the mixture is uniform, thereby obtaining the dust suppressant.
Example 7
The dust suppressant amounted to 1Kg, containing 0.25Kg of calcium chloride, 0.001Kg of sodium alginate, 0.0005Kg of starch, 0.00007Kg of cocamidopropyl betaine and the balance of water. Adding calcium chloride and cocamidopropyl betaine into water, stirring at a speed of 0.5r/s until the mixture is uniform, adding sodium alginate and starch, and stirring at a speed of 1r/s until the mixture is uniform, thereby obtaining the dust suppressant.
Example 8
The dust suppressant amounted to 1Kg, containing 0.25Kg of calcium chloride, 0.001Kg of sodium alginate, 0.0005Kg of starch, 0.00006Kg of cocamidopropyl betaine and the balance of water. Adding calcium chloride and cocamidopropyl betaine into water, stirring at a speed of 0.5r/s until the mixture is uniform, adding sodium alginate and starch, and stirring at a speed of 1r/s until the mixture is uniform, thereby obtaining the dust suppressant.
Comparative example 1
The same raw materials, the proportions thereof and the preparation method as in example 1 were used except that polyacrylamide was used as the anti-steaming agent instead of calcium chloride.
Comparative example 2
The raw materials, the proportions and the preparation methods are the same as those of example 2, except that xanthan gum, not sodium alginate and starch, is used as the crusting agent.
Comparative example 3
The same raw materials, proportions and preparation methods as in example 3 were used, except that sodium dodecyl sulfate was used as the surfactant instead of cocamidopropyl betaine.
The dust suppressants obtained in examples 1 to 8 and comparative examples 1 to 3 were tested to obtain moisture retention, dust suppression and crusting effects as shown in table 1.
TABLE 1
| Moisture retention rate | Dust suppression rate | Crusting effect | |
| Example 1 | 96.75％ | 99.23％ | Good grade (good) |
| Example 2 | 98.75％ | 95.47％ | Good grade (good) |
| Example 3 | 90.35％ | 92.45％ | Excellent (excellent) |
| Example 4 | 94.21％ | 95.17％ | Good grade (good) |
| Example 5 | 92.33％ | 90.92％ | Good grade (good) |
| Example 6 | 79.86％ | 95.17％ | Good grade (good) |
| Example 7 | 95.53％ | 90.92％ | Good grade (good) |
| Example 8 | 91.25％ | 90.11％ | Good grade (good) |
| Comparative example 1 | 75.53％ | 80.92％ | Good grade (good) |
| Comparative example 2 | 85.86％ | 85.17％ | Difference of difference |
| Comparative example 3 | 79.33％ | 70.92％ | Good grade (good) |
Although the invention has been described in detail in the foregoing for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be limited by the claims.
Claims (9)
1. The crust moisturizing dust suppressant for the gangue pile or the coal briquette pile comprises the following components in percentage by weight, 100% in total: 25-35% of calcium chloride, 0.1-0.2% of sodium alginate, 0.05-0.07% of starch, 0.005-0.007% of cocamidopropyl betaine and the balance of water.
2. A dust suppressant according to claim 1, wherein the sodium alginate is in the form of a particulate powder.
3. A process for preparing the dust suppressant of claim 1 or 2, comprising the steps of:
a) Adding calcium chloride and cocamidopropyl betaine into water, mixing and stirring uniformly to obtain a mixed solution;
b) And C, adding sodium alginate and starch into the mixed solution obtained in the step A, and continuously stirring until the mixture is uniformly mixed to obtain the dust suppressant.
4. The production method according to claim 3, wherein the stirring speed in step B is higher than the stirring speed in step A.
5. The process according to claim 4, wherein the stirring speed in the step A is 0.1 to 0.8r/s; the stirring speed in the step B is 0.5-2.0r/s.
6. Use of a dust suppressant according to claim 1 or 2 or obtained by a process according to any one of claims 3 to 5 for suppressing dust from a coal or gangue pile.
7. The use according to claim 6, wherein the dust suppressant has a use density of not less than 1L/m 2 。
8. A method of inhibiting dust build-up in a coal or gangue pile comprising spraying a dust suppressant according to claim 1 or 2 or a dust suppressant obtainable by a process according to any one of claims 3 to 5, optionally diluted, onto the surface of a gangue pile or the surface of a coal pile.
9. The method of claim 8, wherein the dust suppressant spray density is no less than 1L/m 2 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210258451.XA CN114539976B (en) | 2022-03-16 | 2022-03-16 | Crust moisturizing dust suppressant and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210258451.XA CN114539976B (en) | 2022-03-16 | 2022-03-16 | Crust moisturizing dust suppressant and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114539976A CN114539976A (en) | 2022-05-27 |
| CN114539976B true CN114539976B (en) | 2023-06-20 |
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| CN102660227B (en) * | 2012-05-02 | 2013-12-11 | 山西兆益矿用材料有限公司 | Road dust suppressant |
| CN104533507B (en) * | 2014-12-15 | 2016-08-17 | 山东科技大学 | A kind of colliery rock dirt the adding set of poly-moisturizing inhibitor |
| CN105602525B (en) * | 2015-11-24 | 2018-02-06 | 陇东学院 | One kind collaboration antifreeze coal dust inhibitor of moisturizing and preparation method thereof |
| CN109082265A (en) * | 2018-09-10 | 2018-12-25 | 浙江大学 | A kind of efficient urban road dust suppressant |
| CN110194947B (en) * | 2019-06-04 | 2022-02-01 | 中国葛洲坝集团易普力股份有限公司 | Multifunctional surface mine pavement dust suppressant and preparation method thereof |
| CN111139034A (en) * | 2020-01-22 | 2020-05-12 | 内蒙古科绿源精细化工有限责任公司 | Dust suppressant for coal and iron ore powder storage yard roads and preparation method thereof |
| CN111892912A (en) * | 2020-03-12 | 2020-11-06 | 南通乐尔环保科技有限公司 | Formula of anti-freezing dust suppressant |
| CN111732935A (en) * | 2020-06-30 | 2020-10-02 | 中盐工程技术研究院有限公司 | Environment-friendly road special dust suppressant |
| CN113046027A (en) * | 2021-03-29 | 2021-06-29 | 华北科技学院(中国煤矿安全技术培训中心) | Dust settling agent for cement dust and preparation method thereof |
| CN113372880A (en) * | 2021-05-26 | 2021-09-10 | 秦皇岛天惠环境科技有限公司 | Antifreezing moisture-retaining dust inhibitor and preparation method thereof |
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