CN110724497A - Dust suppressant for coal loading and unloading process and preparation method thereof - Google Patents
Dust suppressant for coal loading and unloading process and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 13
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- MGIYRDNGCNKGJU-UHFFFAOYSA-N isothiazolinone Chemical compound O=C1C=CSN1 MGIYRDNGCNKGJU-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical group CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 claims description 8
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 8
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims description 7
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- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 5
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 5
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000002888 zwitterionic surfactant Substances 0.000 claims description 5
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 claims description 4
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- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
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Classifications
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- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
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Abstract
The invention discloses a dust suppressant for a coal loading and unloading process and a preparation method thereof, wherein the dust suppressant comprises the following components in parts by weight: based on 100 parts by weight, 4-6 parts of surfactant, 2-5 parts of accelerator, 0.5-2 parts of adhesive, 0.5-2 parts of auxiliary material, 0.2-0.5 part of defoamer, 0.2-0.4 part of bactericide and the balance of water; the preparation method comprises the following steps: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) and (5) preparing a finished product. When coal is excavated underground, transported by a train or an automobile, the dust suppressant is sprayed by a spraying system, floating coal dust can be captured by 100 percent, the thickness of a 10s solidified layer reaches 5-10mm, the wind erosion rate is lower than 0.1 percent, and the film can keep the sedimentation effect of the coal dust for a long time, thereby achieving the purpose of clean loading, unloading or transporting the pulverized coal.
Description
The technical field is as follows:
the invention relates to a dust suppressant and a preparation method thereof, in particular to a dust suppressant for a coal loading and unloading process and a preparation method thereof.
Background art:
during the operation process of loading, unloading or transferring pulverized coal in the open air by using a loader and an excavator, the pulverized coal flies, the pollution area of the peripheral pulverized coal can reach 5000 square meters, and the wind weather condition is more serious, for example, when the wind power reaches more than 5 grades, the pollution area of the pulverized coal can reach 50000 square meters. Moreover, the air quality at the loading and unloading site is seriously deteriorated, which poses a serious threat to the health of the loading and unloading workers. The currently marketed dust suppressant has the defects of poor dust capturing effect, long film forming and condensing time, incapability of meeting the use requirements of the thickness of a formed curing layer, poor bonding strength and toughness, secondary dust raising in a short time and the like in the actual use, so that the use performance and popularization and application of the dust suppressant are greatly influenced.
The invention content is as follows:
the first purpose of the invention is to provide a dust suppressant for coal loading and unloading process, which can rapidly capture coal dust, suppress dust rapidly and prolong secondary dust raising time.
The first purpose of the invention is implemented by the following technical scheme: a dust suppressant for coal loading and unloading process comprises the following components in parts by weight: based on 100 parts by weight, the coating comprises 4-6 parts of surfactant, 2-5 parts of accelerator, 0.5-2 parts of adhesive, 0.5-2 parts of auxiliary material, 0.2-0.5 part of defoaming agent, 0.2-0.4 part of bactericide and the balance of water.
Preferably, the surfactant is prepared from an anionic surfactant and a zwitterionic surfactant in a mass ratio of 1:1 is compounded according to the proportion of 1.
Preferably, the anionic surfactant is sodium dodecylbenzene sulfonate or sodium dodecyl sulfate.
Preferably, the zwitterionic surfactant is dodecyl dimethyl betaine or octadecyl dimethyl aminoethylenolactone.
Preferably, the accelerator is one or more of nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether.
Preferably, the binder is any one or more of carboxymethyl cellulose, hydroxyethyl cellulose or hydroxypropyl methyl cellulose.
Preferably, the auxiliary material is any one or more of corn pregelatinized starch, potato pregelatinized starch or cassava pregelatinized starch.
Preferably, the defoaming agent is an organic silicon defoaming agent, so that foam generated by dissolving the surfactant is eliminated, and the influence of foam generated by shaking of a vehicle and the like in the transportation process on spraying is avoided.
Preferably, the bactericide is isothiazolinone. Because the auxiliary materials contain components such as starch and the like, the phenomena of bottle expansion, putrefactive odor and the like caused by factors such as fermentation and the like can be effectively avoided by adding the bactericide.
According to the invention, the anionic surfactant sodium dodecyl benzene sulfonate and the zwitterionic surfactant dodecyl dimethyl betaine are compounded according to a specific proportion, so that the coating wetting of water mist on free coal dust with various particle sizes is enhanced; the accelerant is one or more of nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether or lauryl alcohol polyoxyethylene ether, the surface tension of the solution is reduced to be within the range of 20-30N/m through the synergistic effect of the accelerant and the surfactant, free coal dust can be effectively captured, and the wetting and penetrating effects are good. The adhesive is any one or more of carboxymethyl cellulose, hydroxyethyl cellulose or hydroxypropyl methyl cellulose, fine coal dust is formed into agglomerates through adsorption and condensation, the settling velocity of the coal dust is accelerated, and a full immersion settling experiment shows that the settling velocity of the coal dust can reach 10 s. The auxiliary material is one or more of corn pregelatinized starch, potato pregelatinized starch or cassava pregelatinized starch, the settled coal dust is gradually bonded into sheets by the matching of the adhesive and the auxiliary material to form a large-sheet film shell whole, the thickness of a 10s curing layer reaches 5-10mm, the wind erosion rate is lower than 0.1%, the film can keep the settling effect of the coal dust for a long time, the time of secondary dust raising under natural conditions is greatly prolonged, and the aim of cleaning, loading, unloading or transporting the pulverized coal is fulfilled.
The second purpose of the invention is to provide a preparation method of the dust suppressant for coal loading and unloading process, which can quickly capture coal dust, suppress dust rapidly and prolong secondary dust raising time.
The second purpose of the invention is implemented by the following technical scheme: a preparation method of a dust suppressant for a coal loading and unloading process comprises the following steps: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) preparing a finished product; wherein the content of the first and second substances,
(1) preparing materials: weighing the following components in parts by weight based on 100 parts by weight: 4-6 parts of surfactant, 2-5 parts of accelerator, 0.5-2 parts of adhesive, 0.5-2 parts of auxiliary material, 0.2-0.5 part of defoamer, 0.2-0.4 part of bactericide and the balance of water;
(2) preparing solution A by using a bonding agent and auxiliary materials: in order to avoid caking of the adhesive caused by too fast addition and insufficient dissolution, the adhesive and the auxiliary materials weighed in the step (1) are slowly added into a container containing 60 parts by weight of water while stirring, and the stirring is continued until the solution is completely dissolved to obtain solution A;
(3) preparing a solution B by using a surfactant and an accelerator: adding the surfactant and the accelerant weighed in the step (1) into a container filled with 20 parts by weight of water, and continuously stirring until the solution is completely dissolved to obtain a solution B;
(4) preparing a finished product: and (3) adding the solution B prepared in the step (3) into the solution A prepared in the step (2), uniformly stirring, adding a defoaming agent and a bactericide, and uniformly mixing to obtain a finished product. The solution A is viscous transparent liquid, the surfactant in the solution B is combined with water into transparent flocculent, and the flocculent is continuously stirred until the flocculent is dissolved, so that the flocculent solution A needs to be prepared separately, and meanwhile, the solution B is added into the solution A, so that the material loss caused by wall hanging can be avoided.
The application method of the dust suppressant comprises the following steps: diluting according to the dust raising condition of a coal yard, wherein the dust suppressant is diluted with water according to the following weight ratio: 1: 500 to 1: 2000.
the invention has the advantages that:
(1) the invention is prepared by dissolving organic and high molecular substances with certain characteristics in water, and the obtained product is environment-friendly flowing liquid, is tasteless, nontoxic, harmless, noncorrosive, nonflammable, has no influence on coal quality, and cannot cause secondary pollution;
(2) when coal is excavated underground, transported by a train or an automobile, the dust suppressant is sprayed by a spraying system, floating coal dust can be captured by 100 percent, the thickness of a sprayed 10s solidified layer reaches 5-10mm, the wind erosion rate is lower than 0.1 percent, the film can keep the sedimentation effect of the coal dust for a long time, the time for generating secondary dust under natural conditions is greatly prolonged, and the aim of cleaning, loading, unloading or transporting pulverized coal is fulfilled;
(3) the pulverized coal dust suppressant disclosed by the invention is simple in preparation method, simple and convenient to use and operate, lower in production cost, convenient to operate and implement and capable of meeting the environmental protection requirement, not only can reduce the loss of mining and transportation units and coal customers, but also can effectively protect the environment, and has good social and economic benefits.
The specific implementation mode is as follows:
example 1:
a dust suppressant for coal loading and unloading process comprises 50g of surfactant, 30g of accelerator, 8g of binder, 8g of auxiliary material, 2g of defoamer, 2g of bactericide and 900g of water in balance. In the embodiment, the surfactant is prepared by compounding commercially available sodium dodecyl sulfate and commercially available dodecyl dimethyl betaine, and the addition ratio is 1: 1; the accelerator is nonionic surfactant commercially available nonylphenol polyoxyethylene ether; the binder is commercially available carboxymethyl cellulose; the auxiliary material is commercial corn pregelatinized starch; the defoaming agent is a commercially available organic silicon defoaming agent; the bactericide is commercially available isothiazolinone.
Example 2: example 1 a process for the preparation of a dust suppressant comprising the steps of: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) preparing a finished product; wherein the content of the first and second substances,
(1) preparing materials: weighing 50g of surfactant, 30g of accelerator, 8g of binder, 8g of auxiliary material, 2g of defoamer, 2g of bactericide and 900g of water in balance;
(2) preparing solution A by using a bonding agent and auxiliary materials: slowly adding the adhesive and the auxiliary materials weighed in the step (1) into a container containing 60 parts by weight of water while stirring, and continuously stirring until the solution is completely dissolved to obtain a solution A;
(3) preparing a solution B by using a surfactant and an accelerator: adding the surfactant and the accelerant weighed in the step (1) into a container filled with 20 parts by weight of water, and continuously stirring until the solution is completely dissolved to obtain a solution B;
(4) preparing a finished product: and (3) adding the solution B prepared in the step (3) into the solution A prepared in the step (2), uniformly stirring, adding a defoaming agent and a bactericide, and uniformly mixing to obtain a finished product.
When the dust suppressant is used, the dust suppressant is diluted according to the dust raising condition of a coal yard, and the dust suppressant and water in the embodiment are diluted according to the following weight ratio: 1: 1000.
example 3:
a dust suppressant for coal loading and unloading process comprises 55g of surfactant, 35g of accelerator, 10g of binder, 10g of auxiliary material, 2g of defoamer, 2g of bactericide and the balance of water 886 g. In the embodiment, the surfactant is prepared by compounding commercially available sodium dodecyl benzene sulfonate and commercially available octadecyl dimethyl amine ethyl lactone, and the adding ratio is 1: 1; the accelerator is nonylphenol polyoxyethylene ether sold in the market as a nonionic surfactant; the binder is commercial carboxypropyl methyl cellulose; the auxiliary material is potato pregelatinized starch sold in the market; the defoaming agent is a commercially available organic silicon defoaming agent; the bactericide is commercially available isothiazolinone.
Example 4:
example 3 a process for the preparation of a dust suppressant comprising the steps of: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) preparing a finished product; wherein the content of the first and second substances,
(1) preparing materials: weighing 55g of surfactant, 35g of accelerator, 10g of binder, 10g of auxiliary material, 2g of defoamer, 2g of bactericide and 886g of water in balance;
(2) preparing solution A by using a bonding agent and auxiliary materials: slowly adding the adhesive and the auxiliary materials weighed in the step (1) into a container containing 60 parts by weight of water while stirring, and continuously stirring until the solution is completely dissolved to obtain a solution A;
(3) preparing a solution B by using a surfactant and an accelerator: adding the surfactant and the accelerant weighed in the step (1) into a container filled with 20 parts by weight of water, and continuously stirring until the solution is completely dissolved to obtain a solution B;
(4) preparing a finished product: and (3) adding the solution B prepared in the step (3) into the solution A prepared in the step (2), uniformly stirring, adding a defoaming agent and a bactericide, and uniformly mixing to obtain a finished product.
When the dust suppressant is used, the dust suppressant is diluted according to the dust raising condition of a coal yard, and the dust suppressant and water in the embodiment are diluted according to the following weight ratio: 1: 1000.
example 5: a dust suppressant for coal loading and unloading process comprises 45g of surfactant, 25g of accelerator, 10g of binder, 10g of auxiliary material, 2g of defoamer, 2g of bactericide and 906g of water in balance. In the embodiment, the surfactant is prepared by compounding commercially available sodium dodecyl benzene sulfonate and commercially available dodecyl dimethyl betaine, and the addition ratio is 1: 1; the accelerator is nonylphenol polyoxyethylene ether sold in the market as a nonionic surfactant; the binder is commercially available carboxyethyl cellulose; the auxiliary material is commercially available cassava pregelatinized starch; the defoaming agent is a commercially available organic silicon defoaming agent; the bactericide is commercially available isothiazolinone.
Example 6:
example 5 a process for preparing a dust suppressant comprising the steps of: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) preparing a finished product; wherein the content of the first and second substances,
(1) preparing materials: weighing 45g of surfactant, 25g of accelerator, 10g of binder, 10g of auxiliary material, 2g of defoamer, 2g of bactericide and 906g of water in balance;
(2) preparing solution A by using a bonding agent and auxiliary materials: slowly adding the adhesive and the auxiliary materials weighed in the step (1) into a container containing 60 parts by weight of water while stirring, and continuously stirring until the solution is completely dissolved to obtain a solution A;
(3) preparing a solution B by using a surfactant and an accelerator: adding the surfactant and the accelerant weighed in the step (1) into a container filled with 20 parts by weight of water, and continuously stirring until the solution is completely dissolved to obtain a solution B;
(4) preparing a finished product: and (3) adding the solution B prepared in the step (3) into the solution A prepared in the step (2), uniformly stirring, adding a defoaming agent and a bactericide, and uniformly mixing to obtain a finished product.
When the dust suppressant is used, the dust suppressant is diluted according to the dust raising condition of a coal yard, and the dust suppressant and water in the embodiment are diluted according to the following weight ratio: 1: 1000.
example 7: a dust suppressant for coal loading and unloading process comprises 50g of surfactant, 30g of accelerator, 9g of binder, 15g of auxiliary material, 2g of defoamer, 2g of bactericide and 900g of water in balance. In the embodiment, the surfactant is prepared by compounding commercially available sodium dodecyl benzene sulfonate and commercially available dodecyl dimethyl betaine, and the addition ratio is 1: 1; the accelerator is a mixture of commercially available nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether in a mass ratio of 1:1:1, wherein the nonionic surfactant is used as a nonionic surfactant; the binder is a mixture of commercially available carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose according to the mass ratio of 1:2: 3; the auxiliary materials are commercially available corn pregelatinized starch, potato pregelatinized starch and cassava pregelatinized starch in a mass ratio of 1:1:1 ratio of the mixture; the defoaming agent is a commercially available organic silicon defoaming agent; the bactericide is commercially available isothiazolinone.
Example 8:
example 7 a process for the preparation of a dust suppressant comprising the steps of: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) preparing a finished product; wherein the content of the first and second substances,
(1) preparing materials: weighing 50g of surfactant, 30g of accelerator, 9g of binder, 15g of auxiliary material, 2g of defoamer, 2g of bactericide and 900g of water in balance;
(2) preparing solution A by using a bonding agent and auxiliary materials: slowly adding the adhesive and the auxiliary materials weighed in the step (1) into a container containing 60 parts by weight of water while stirring, and continuously stirring until the solution is completely dissolved to obtain a solution A;
(3) preparing a solution B by using a surfactant and an accelerator: adding the surfactant and the accelerant weighed in the step (1) into a container filled with 20 parts by weight of water, and continuously stirring until the solution is completely dissolved to obtain a solution B;
(4) preparing a finished product: and (3) adding the solution B prepared in the step (3) into the solution A prepared in the step (2), uniformly stirring, adding a defoaming agent and a bactericide, and uniformly mixing to obtain a finished product.
When the dust suppressant is used, the dust suppressant is diluted according to the dust raising condition of a coal yard, and the dust suppressant and water in the embodiment are diluted according to the following weight ratio: 1: 1000.
example 9: a dust suppressant for coal loading and unloading process comprises 60g of surfactant, 50g of accelerator, 20g of binder, 20g of auxiliary material, 5g of defoamer, 5g of bactericide and 820g of water in balance. In the embodiment, the surfactant is prepared by compounding commercially available sodium dodecyl benzene sulfonate and commercially available dodecyl dimethyl betaine, and the addition ratio is 1: 1; the accelerator is fatty alcohol-polyoxyethylene ether sold in the market of nonionic surfactant; the binder is commercially available hydroxypropyl methylcellulose; the auxiliary material is commercial corn pregelatinized starch; the defoaming agent is a commercially available organic silicon defoaming agent; the bactericide is commercially available isothiazolinone.
Example 10:
example 9 a process for the preparation of a dust suppressant comprising the steps of: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) preparing a finished product; wherein the content of the first and second substances,
(1) preparing materials: weighing 60g of surfactant, 50g of accelerator, 20g of binder, 20g of auxiliary material, 5g of defoamer, 5g of bactericide and 820g of water in balance;
(2) preparing solution A by using a bonding agent and auxiliary materials: slowly adding the adhesive and the auxiliary materials weighed in the step (1) into a container containing 60 parts by weight of water while stirring, and continuously stirring until the solution is completely dissolved to obtain a solution A;
(3) preparing a solution B by using a surfactant and an accelerator: adding the surfactant and the accelerant weighed in the step (1) into a container filled with 20 parts by weight of water, and continuously stirring until the solution is completely dissolved to obtain a solution B;
(4) preparing a finished product: and (3) adding the solution B prepared in the step (3) into the solution A prepared in the step (2), uniformly stirring, adding a defoaming agent and a bactericide, and uniformly mixing to obtain a finished product.
When the dust suppressant is used, the dust suppressant is diluted according to the dust raising condition of a coal yard, and the dust suppressant and water in the embodiment are diluted according to the following weight ratio: 1: 2000.
example 11: a dust suppressant for coal loading and unloading process comprises 40g of surfactant, 20g of accelerator, 5g of binder, 5g of auxiliary material, 3g of defoamer, 3g of bactericide and 924g of water in balance. In the embodiment, the surfactant is prepared by compounding commercially available sodium dodecyl benzene sulfonate and commercially available dodecyl dimethyl betaine, and the addition ratio is 1: 1; the accelerator is lauryl alcohol polyoxyethylene ether sold in the market of nonionic surfactant; the binder is commercially available hydroxyethyl cellulose; the auxiliary materials are commercial corn pregelatinized starch and potato pregelatinized starch in a mass ratio of 1:2 ratio of the mixture; the defoaming agent is a commercially available organic silicon defoaming agent; the bactericide is commercially available isothiazolinone.
Example 12:
example 11 a process for preparing a dust suppressant comprising the steps of: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) preparing a finished product; wherein the content of the first and second substances,
(1) preparing materials: weighing 40g of surfactant, 20g of accelerator, 5g of binder, 5g of auxiliary material, 3g of defoamer, 3g of bactericide and 924g of water in balance;
(2) preparing solution A by using a bonding agent and auxiliary materials: slowly adding the adhesive and the auxiliary materials weighed in the step (1) into a container containing 60 parts by weight of water while stirring, and continuously stirring until the solution is completely dissolved to obtain a solution A;
(3) preparing a solution B by using a surfactant and an accelerator: adding the surfactant and the accelerant weighed in the step (1) into a container filled with 20 parts by weight of water, and continuously stirring until the solution is completely dissolved to obtain a solution B;
(4) preparing a finished product: and (3) adding the solution B prepared in the step (3) into the solution A prepared in the step (2), uniformly stirring, adding a defoaming agent and a bactericide, and uniformly mixing to obtain a finished product.
When the dust suppressant is used, the dust suppressant is diluted according to the dust raising condition of a coal yard, and the dust suppressant and water in the embodiment are diluted according to the following weight ratio: 1: 500.
example 13:
and (3) comparison test: the surface tension of the solution, the settling velocity of the fully-impregnated coal dust, the dust suppression effect and the secondary raising time of the coal dust are respectively measured by carrying out a comparative test on a commercial dust suppressant and products prepared in examples 2, 4, 6, 8, 10 and 12 of the invention in a laboratory and a mine excavation tunnel of a certain coal mine, and the obtained results are shown in the following table.
Note:
(1) the wind erosion rate determination method comprises the following steps:
① taking 6kg of coal sample which is sieved by a 20-mesh sieve, and drying in an oven at 70-80 ℃ for 1 h;
② taking 3 enamel trays, equally dividing into three parts, wherein each part is a coal sample m1, and adding the three parts into the enamel trays respectively;
③ respectively spraying test liquid and dust suppressant on the surface of the coal sample for 10s to simulate wind erosion, standing for 1h, weighing m2, and dividing the amount of the coal sample m1-m2 by the amount of the coal sample m1 before wind blowing to obtain the wind erosion rate of the coal sample.
(2) And (3) measuring the thickness of the cured layer: and (3) taking the cured layer, measuring the thickness of the cured layer by using a vernier caliper, and calculating the average value to obtain the coating.
1. The dust suppressant disclosed by the invention has the advantages that the surface tension of the solution is reduced to be within the range of 20-30N/m through the synergistic effect of the accelerator and the surfactant, the free coal dust can be effectively captured, and the wetting and penetrating effects are good. The surface tension of the dust suppressant solutions prepared in examples 2, 4, 6, 8, 10, and 12 was significantly less than the surface tension of commercial dust suppressant solutions;
2. as the bonding components are added into the dust suppressant, fine coal dust forms agglomerates through adsorption and condensation, the coal dust settling speed is accelerated, and a full immersion settling experiment shows that the coal dust settling speed of the dust suppressant can reach 10s and the overall capture speed is accelerated;
3. the bonding component and the auxiliary material are combined, so that a film is formed on the surface of the settled coal dust, the secondary dust raising time of the settled coal dust is prolonged compared with a commercially available dust suppressant, and the treatment effect is more obvious.
4. The dust suppressant disclosed by the invention is composed of biodegradable substances which can not generate secondary pollution, can not generate harm to the environment and human bodies, is an environment-friendly reagent, is low in product cost and has good economic and social benefits.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A dust suppressant for coal loading and unloading process is characterized by comprising the following components in parts by weight: based on 100 parts by weight, the coating comprises 4-6 parts of surfactant, 2-5 parts of accelerator, 0.5-2 parts of adhesive, 0.5-2 parts of auxiliary material, 0.2-0.5 part of defoaming agent, 0.2-0.4 part of bactericide and the balance of water.
2. A dust suppressant for coal handling according to claim 1 wherein said surfactant is a mixture of anionic surfactant and zwitterionic surfactant in a mass ratio of 1:1 is compounded according to the proportion of 1.
3. A dust suppressant for coal handling according to claim 2 wherein said anionic surfactant is sodium dodecylbenzene sulfonate or sodium dodecyl sulfate.
4. A dust suppressant for a coal handling process according to claim 2 wherein said zwitterionic surfactant is dodecyl dimethyl betaine or octadecyl dimethyl aminoethylenolactone.
5. A dust suppressant for coal handling according to claim 1 wherein said promoter is any one or more of nonylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether or lauryl alcohol polyoxyethylene ether.
6. A dust suppressant for a coal handling process according to claim 1 wherein said binder is any one or more of carboxymethyl cellulose, hydroxyethyl cellulose or hydroxypropyl methyl cellulose.
7. A dust suppressant for a coal handling process according to claim 1 wherein said adjuvant is any one or more of corn pregelatinized starch, potato pregelatinized starch or tapioca pregelatinized starch.
8. A dust suppressant for a coal handling process according to claim 1 wherein said defoamer is a silicone defoamer.
9. A dust suppressant for a coal handling process according to claim 1 wherein said biocide is an isothiazolinone.
10. A method of producing a dust suppressant for a coal handling process according to any of claims 1 to 9, characterized in that it comprises the steps of: (1) preparing materials; (2) preparing solution A by using an adhesive and auxiliary materials; (3) preparing a solution B by using a surfactant and an accelerator; (4) preparing a finished product; wherein the content of the first and second substances,
(1) preparing materials: weighing the following components in parts by weight based on 100 parts by weight: 4-6 parts of surfactant, 2-5 parts of accelerator, 0.5-2 parts of adhesive, 0.5-2 parts of auxiliary material, 0.2-0.5 part of defoamer, 0.2-0.4 part of bactericide and the balance of water;
(2) preparing solution A by using a bonding agent and auxiliary materials: slowly adding the adhesive and the auxiliary materials weighed in the step (1) into a container containing 60 parts by weight of water while stirring, and continuously stirring until the solution is completely dissolved to obtain a solution A;
(3) preparing a solution B by using a surfactant and an accelerator: adding the surfactant and the accelerant weighed in the step (1) into a container filled with 20 parts by weight of water, and continuously stirring until the solution is completely dissolved to obtain a solution B;
(4) preparing a finished product: and (3) adding the solution B prepared in the step (3) into the solution A prepared in the step (2), uniformly stirring, adding a defoaming agent and a bactericide, and uniformly mixing to obtain a finished product.
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