Wet type multifunctional dust suppressant for coal mine and preparation method of wet type multifunctional dust suppressant

Abstract

The invention relates to a wet type multifunctional dust suppressant for a coal mine and a preparation method thereof. The wet type multifunctional dust suppressant consists of a component A and a component B, wherein the component A is prepared from surfactants such as AP470Z, Tween-80, Dow TRITON CF-10, Yinhuo Dynol 607 and Digao TEGO245, as well as glycerol, a de-foaming agent and industrial water; the component B is prepared from pregelatinized cassava starch, high-viscosity yellow dextrin, sodium carbonate, potassium carbonate, sodium hydroxide, industrial water and the like. And uniformly mixing the component A and the component B according to a mass ratio of 1: 1 to prepare the wet type multifunctional dust suppressant for the coal mine. The wet type multifunctional dust suppressant for the underground coal mine has obvious effects of reducing coal and rock dust and removing hydrogen sulfide gas, and is excellent in comprehensive performance, convenient to produce and simple to use. The dust suppressant can also be used for dust prevention and dust falling in the fields of roads, sand fields and the like, the dust suppressant can be sprayed to underground roadways and working faces prone to generating dust, the dust suppressant can rapidly permeate into oily pulverized coal, the pulverized coal is coagulated and settled, meanwhile, hydrogen sulfide gas in air and coal rock masses can be decomposed, and the purposes of dust falling and hydrogen sulfide gas removal are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of dust suppression and environmental protection, and in particular relates to a wetting multifunctional dust suppressant for coal mines and a preparation method thereof for controlling coal rock dust in underground tunnels, excavation faces and belt conveyors of coal mines. Background Art

[0002] In the process of coal mining production, the dust generated by mechanical mining equipment when separating coal from rock is one of the main sources of coal dust in the working face of coal mines. When mechanized equipment is used for mining, the picks penetrate into the coal seam under huge pressure to crush the coal and rock. Then, as the picks continue to penetrate, the surface of the rock layer will bend or even stretch and break, and the entire fragment will be cut off. As the working face continues to advance, the above process is repeated, and the cut coal and rock are further ground on the surface of the rock layer and the broken coal blocks to produce a large amount of dust. In addition, during the mining and excavation process of coal mines, a large amount of dust will be generated when the roof rock layer is hit, abraded, crushed, and cut. Hydraulic supports are often used for support in the working face of the mining area. When the supports are moved, the unloading effect will cause the top and bottom plates of the working face to deform and generate a large amount of dust. In the transportation process of coal and rock in the mine, dust will be generated in most links, such as the transportation process of conveyor belts, loaders, coal bunkers, and buckets. Dust is thickly accumulated in some locations, which will be further blown under strong wind conditions underground. In addition, the wood used underground in coal mines easily rots in humid environments and produces hydrogen sulfide gas; abandoned old tunnels or coal rock formations will emit hydrogen sulfide gas, which will escape to the underground working surface with mine ventilation or mining activities; and the sulfide minerals existing underground will produce hydrogen sulfide when they decompose in water.

[0003] Dust and hydrogen sulfide have a great impact on the safe production of coal mines. They are the main factors that induce coal dust explosion accidents, threaten the health of workers, cause occupational diseases and affect operational safety. Therefore, it is very important to strengthen the comprehensive management of coal mine dust and the removal of hydrogen sulfide, and strengthen dust prevention and reduction in coal mines to remove hydrogen sulfide gas. Summary of the invention

[0004] In order to achieve the dual effects of dust removal and removal of hydrogen sulfide harmful gas in coal mines, the present invention proposes a wettable multifunctional dust suppressant for coal mines and a preparation method thereof. The dust suppressant is sprayed on underground tunnels and dust-prone working surfaces, which can achieve the effects of dust removal and removal of hydrogen sulfide gas. The wettable multifunctional dust suppressant of the present invention has less foam and good wettability, can quickly penetrate into oily coal powder, and make the coal powder condense and settle, and can further form a wettable soft shell to achieve a long-term dust reduction function. At the same time, the hydrogen sulfide gas in the air and coal rock mass can be decomposed to achieve the effect of eliminating hydrogen sulfide harmful gas. The wettable multifunctional dust suppressant for underground coal mines of the present invention has a significant effect on reducing coal rock dust and removing hydrogen sulfide gas in underground mines, can meet the standard requirements for safe production in coal mines, and is a wettable multifunctional dust suppressant for underground coal mines with excellent comprehensive performance, easy production, and simple use. The product of the present invention can also be used for dust control in other mineral mining processes, and can also be applied to dust suppression and dust prevention on mine roads.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The wettable multifunctional dust suppressant for coal mines of the present invention is composed of component A and component B. The mass content and composition of each component are as follows, in parts by mass:

[0007] Component A: 1-3 parts of ABEX AP470Z nonionic surfactant, 1-3 parts of Tween-80 nonionic surfactant, 1-2 parts of Dow TRITON CF-10 nonionic low foaming wetting agent, 1-3 parts of Evonik Dynol 607 nonionic wetting agent, 1-2 parts of TEGO245 substrate wetting agent, 35-48 parts of glycerol, 0.2-0.5 parts of DU-125 defoaming agent, and 470-510 parts of industrial water.

[0008] Component B: 15-25 parts of pregelatinized cassava starch, 40-50 parts of high-viscosity yellow dextrin powder, 1-3 parts of sodium carbonate, 1-3 parts of potassium carbonate, 0.1-0.5 parts of sodium hydroxide, and 450-490 parts of industrial water.

[0009] All raw materials in the A and B components are commercially available conventional chemical products.

[0010] The preparation method of the wettable multifunctional dust suppressant for coal mines of the present invention is prepared according to the following steps:

[0011] Step 1: Preparation of component A

[0012] Take 470-510 parts of industrial water, add it to an 800-liter mixer with stirring, start stirring, control the stirring speed of the mixer at 30-40 r / min, then add 1-3 parts of ABEX AP470Z nonionic surfactant, 1-3 parts of Tween-80 nonionic surfactant, 1-2 parts of Dow TRITON CF-10 nonionic low-foaming wetting agent, 1-3 parts of Evonik Dynol 607 nonionic wetting agent, 1-2 parts of TEGO245 substrate wetting agent, 35-48 parts of glycerol, and 0.2-0.5 parts of DU-125 defoaming agent to the mixer, stir and mix evenly to obtain component A;

[0013] Step 2: Preparation of component B

[0014] Take 450-490 parts of industrial water, add it to an 800-liter mixer with stirring, turn on the stirring and heating system, control the stirrer speed at 30-40r / min, then evenly add 15-25 parts of pregelatinized cassava starch and 40-50 parts of high-viscosity yellow dextrin powder into the industrial water, mix and dissolve at 85-90°C, after the pregelatinized cassava starch and yellow dextrin powder are completely dissolved, cool to room temperature, then add 1-3 parts of sodium carbonate, 1-3 parts of potassium carbonate, and 0.1-0.5 parts of sodium hydroxide into the mixing kettle, further stir and mix to dissolve evenly, and obtain component B;

[0015] Step 3: Preparation of Wetting Multifunctional Dust Suppressant for Coal Mine

[0016] Add the prepared component A and component B in a mass ratio of 1:1 into a mixer of suitable volume and mix evenly to obtain a wetting multifunctional dust suppressant for coal mines.

[0017] When in use, spray it at a rate of 1.5L to 2L / m2 in mine tunnels, belt conveyors, coal and rock surfaces, near tunneling machine heads and other places prone to dust generation, which can effectively achieve the technical effect and purpose of reducing coal dust in mines and removing hydrogen sulfide gas.

[0018] Experimental test methods

[0019] Dust fall test method:

[0020] Coal powder with a fineness of more than 400 mesh is sprayed into a closed glass test box to make the fine dust evenly distributed in the closed test box. The floating distribution of dust is observed manually. Then, a wettable multifunctional dust suppressant is sprayed into the test box in a mist form. The dust removal in the test box is observed with the naked eye to qualitatively observe the dust removal effect.

[0021] Wetting thickness test:

[0022] Spread coal powder with a fineness of more than 300 meshes on an enamel plate with a thickness of 30-40mm, then spray a wetting multifunctional dust suppressant on the surface of the coal powder with a spraying amount of 1.5L-2L / m2. Place it outdoors for 8-10 minutes, and then measure the thickness of the wet layer on the surface of the coal powder.

[0023] Hydrogen sulfide removal test method:

[0024] Inject hydrogen sulfide gas into a glass-sealed test box, and use a hydrogen sulfide gas detector to measure the hydrogen sulfide gas content in the glass-sealed test box. Then spray the wettable multifunctional dust suppressant into the test box. After 5 minutes, use the hydrogen sulfide gas tester to measure the hydrogen sulfide gas content in the test box again, and calculate the hydrogen sulfide gas removal rate.

[0025] The hydrogen sulfide gas detector is produced by Xi'an Yingrun Environmental Protection Technology Co., Ltd., model ERUA-PG71S4.

[0026] The present invention has the following advantages:

[0027] First, the wetting multifunctional dust suppressant for coal mines of the present invention has the multifunctional effects of rapid wetting, rapid dust reduction, and rapid removal of hydrogen sulfide gas. It has excellent wetting performance and less foam. It can quickly wet and penetrate oily coal rock and coal dust, so that the dust is quickly in a water-containing wet state and condenses and settles, and the dust reduction effect is remarkable.

[0028] Second, due to the presence of pregelatinized cassava starch and yellow dextrin, the dust suppressant can form a soft shell on the surface of coal rock and coal powder after spraying, which can exist on the surface of coal rock and dust for a long time, effectively preventing the rapid evaporation of water in the strong wind flow environment in the mine, causing the coal rock dust to fly again.

[0029] Third, propylene glycol has a boiling point of 290°C, is non-toxic and harmless, non-flammable and non-explosive, does not volatilize at room temperature and under strong wind conditions underground, has the ability to absorb moisture and hydrogen sulfide gas, keeps the dust moist for a longer period of time, effectively prevents the secondary flying of dust, and significantly improves the dust prevention and anti-dust effect underground.

[0030] Fourth, the dilute aqueous solution of sodium carbonate, potassium carbonate and sodium hydroxide is sprayed on the coal rock and underground dust mist. In the presence of pre-gelatinized cassava starch and yellow dextrin colloid, the sodium carbonate, potassium carbonate and sodium hydroxide molecules can have a longer residence time on the coal powder or coal rock, thereby increasing the reaction probability of sodium carbonate, potassium carbonate, sodium hydroxide molecules and hydrogen sulfide molecules, which can effectively decompose hydrogen sulfide gas quickly to generate sodium bicarbonate, potassium and sodium hydrogen sulfide, potassium, sodium hydrogen sulfide and water, effectively eliminating the hazards of hydrogen sulfide gas.

[0031] Fifth, the material combination of the present invention is scientifically and reasonably matched, has excellent comprehensive performance, is easy to obtain raw materials, has a simple preparation process, is low in cost, has low viscosity, is easy to spray, is easy to use, and has significant effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0033] Example 1

[0034] like Figure 1 As shown, the wettable multifunctional dust suppressant for coal mines described in this embodiment is initially composed of component A and component B. The mass content of each component is as follows, in parts by mass:

[0035] Component A: 1 part of ABEX AP470Z nonionic surfactant, 1 part of Tween-80 nonionic surfactant, 1 part of Dow TRITON CF-10 nonionic low foaming wetting agent, 1 part of Evonik Dynol 607 nonionic wetting agent, 1 part of TEGO245 substrate wetting agent, 35 parts of glycerol, 0.2 parts of DU-125 defoaming agent, and 470 parts of industrial water.

[0036] Component B: 15 parts of pregelatinized cassava starch, 40 parts of high-viscosity yellow dextrin powder, 1 part of sodium carbonate, 1 part of potassium carbonate, 0.1 parts of sodium hydroxide, and 450 parts of industrial water.

[0037] The raw materials in the A and B components are all commercially available conventional chemical products, and the defoamer is produced by Dongguan Guozhong New Materials Research Institute Co., Ltd.;

[0038] The preparation method of a wet multifunctional dust suppressant for coal mines described in this embodiment is prepared according to the following steps:

[0039] Step 1: Preparation of component A

[0040] Take 470 parts of industrial water, add it into an 800-liter mixer with stirring, start stirring, control the stirrer speed at 30-40r / min, then add 1 part of ABEX AP470Z nonionic surfactant, 1 part of Tween-80 nonionic surfactant, 1 part of Dow TRITON CF-10 nonionic low-foaming wetting agent, 1 part of Evonik Dynol 607 nonionic wetting agent, 1 part of TEGO245 substrate wetting agent, 35 parts of glycerol, and 0.2 parts of DU-125 defoaming agent into the mixer in sequence, stir and mix evenly to obtain component A.

[0041] Step 2: Preparation of component B

[0042] Take 450 parts of industrial water, add it to an 800-liter mixer with stirring, turn on the stirring and heating system, control the stirrer speed at 30-40r / min, then evenly add 15 parts of pregelatinized cassava starch and 40 parts of high-viscosity yellow dextrin powder into the industrial water, mix and dissolve at 85-90°C, after the pregelatinized cassava starch and yellow dextrin powder are completely dissolved, cool to room temperature, then add 1 part of sodium carbonate, 1 part of potassium carbonate and 0.1 part of sodium hydroxide into the mixing kettle, further stir and mix to dissolve evenly, and obtain component B.

[0043] Step 3: Preparation of a wetting multifunctional dust suppressant for coal mines

[0044] When in use, add A and B in a mass ratio of 1:1 into a mixer of suitable volume and mix evenly to obtain a wetting multifunctional dust suppressant for coal mines. Then spray it at a spraying amount of 1.5L~2L / m2 on underground tunnels, belt transportation, coal and rock surfaces, near tunneling machine heads and other places prone to dust generation, which can effectively achieve the technical effect and purpose of reducing coal dust in mines and removing hydrogen sulfide gas.

[0045] Example 2

[0046] The wettable multifunctional dust suppressant for coal mines described in this embodiment is initially composed of component A and component B. The mass content of each component is as follows, in parts by mass:

[0047] Component A: 3 parts of ABEX AP470Z nonionic surfactant, 3 parts of Tween-80 nonionic surfactant, 2 parts of Dow TRITON CF-10 nonionic low foaming wetting agent, 3 parts of Evonik Dynol 607 nonionic wetting agent, 2 parts of TEGO245 substrate wetting agent, 48 parts of glycerol, 0.5 parts of DU-125 defoaming agent, and 510 parts of industrial water.

[0048] Component B: 25 parts of pregelatinized cassava starch, 50 parts of high-viscosity yellow dextrin powder, 3 parts of sodium carbonate, 3 parts of potassium carbonate, 0.5 parts of sodium hydroxide, and 490 parts of industrial water.

[0049] The raw materials in the A and B components are all commercially available conventional chemical products, and the defoamer is produced by Dongguan Guozhong New Materials Research Institute Co., Ltd.;

[0050] The preparation method of a wet multifunctional dust suppressant for coal mines described in this embodiment is prepared according to the following steps:

[0051] Step 1: Preparation of component A

[0052] Take 510 parts of industrial water, add it to an 800-liter mixer with stirring, start stirring, control the stirrer speed at 30-40r / min, then add 3 parts of ABEX AP470Z nonionic surfactant, 3 parts of Tween-80 nonionic surfactant, 2 parts of Dow TRITON CF-10 nonionic low-foaming wetting agent, 3 parts of Evonik Dynol 607 nonionic wetting agent, 2 parts of TEGO245 substrate wetting agent, 48 parts of propylene glycol, and 0.5 parts of DU-125 defoaming agent into the mixer in sequence, stir and mix evenly to obtain component A.

[0053] Step 2: Preparation of component B

[0054] Take 490 parts of industrial water, add it to an 800-liter mixer with stirring, turn on the stirring and heating system, control the stirrer speed at 30-40r / min, then evenly add 25 parts of pregelatinized cassava starch and 50 parts of high-viscosity yellow dextrin powder into the industrial water, mix and dissolve at 85-90°C, after the pregelatinized cassava starch and yellow dextrin powder are completely dissolved, cool to room temperature, then add 3 parts of sodium carbonate, 3 parts of potassium carbonate, and 0.5 parts of sodium hydroxide into the mixing kettle, further stir and mix to dissolve evenly, and obtain component B.

[0055] Step 3: Preparation of Wetting Multifunctional Dust Suppressant for Coal Mine

[0056] When in use, add A and B in a mass ratio of 1:1 into a mixer of suitable volume and mix evenly to obtain a wetting multifunctional dust suppressant for coal mines. Then spray it at a spraying amount of 1.5L~2L / m2 on underground tunnels, belt transportation, coal and rock surfaces, near tunneling machine heads and other places prone to dust generation, which can effectively achieve the technical effect and purpose of reducing coal dust in mines and removing hydrogen sulfide gas.

[0057] Example 3

[0058] The wettable multifunctional dust suppressant for coal mines described in this embodiment is initially composed of component A and component B. The mass content of each component is as follows, in parts by mass:

[0059] Component A: 2 parts of ABEX AP470Z nonionic surfactant, 2 parts of Tween-80 nonionic surfactant, 2 parts of Dow TRITON CF-10 nonionic low foaming wetting agent, 2 parts of Evonik Dynol 607 nonionic wetting agent, 2 parts of TEGO245 substrate wetting agent, 41 parts of glycerol, 0.3 parts of DU-125 defoaming agent, and 480 parts of industrial water.

[0060] Component B: 18 parts of pregelatinized cassava starch, 45 parts of high-viscosity yellow dextrin powder, 2 parts of sodium carbonate, 2 parts of potassium carbonate, 0.5 parts of sodium hydroxide, and 470 parts of industrial water.

[0061] The raw materials in the A and B components are all commercially available conventional chemical products. The defoamer is produced by Dongguan Guozhong New Materials Research Institute Co., Ltd.;

[0062] The preparation method of the wet multifunctional dust suppressant for coal mines described in this embodiment is prepared according to the following steps:

[0063] Step 1: Preparation of component A

[0064] Take 480 parts of industrial water, add it into an 800-liter mixer with stirring, start stirring, control the stirrer speed at 30-40r / min, then add 2 parts of ABEX AP470Z nonionic surfactant, 2 parts of Tween-80 nonionic surfactant, 2 parts of Dow TRITON CF-10 nonionic low-foaming wetting agent, 2 parts of Evonik Dynol 607 nonionic wetting agent, 2 parts of TEGO245 substrate wetting agent, 41 parts of glycerol, and 0.3 parts of DU-125 defoaming agent into the mixer in sequence, stir and mix evenly to obtain component A.

[0065] Step 2: Preparation of component B

[0066] Take 470 parts of industrial water, add it to an 800-liter mixer with stirring, turn on the stirring and heating system, control the stirrer speed at 30-40r / min, then evenly add 18 parts of pregelatinized cassava starch and 45 parts of high-viscosity yellow dextrin powder into the industrial water, mix and dissolve at 85-90°C, after the pregelatinized cassava starch and yellow dextrin powder are completely dissolved, cool to room temperature, then add 2 parts of sodium carbonate, 2 parts of potassium carbonate and 0.5 parts of sodium hydroxide into the mixing kettle, further stir and mix to dissolve evenly, and obtain component B.

[0067] Step 3: Preparation of Wetting Multifunctional Dust Suppressant for Coal Mine

[0068] When in use, add A and B in a mass ratio of 1:1 into a mixer of suitable volume and mix evenly to obtain a wetting multifunctional dust suppressant for coal mines. Then spray it at a spraying amount of 1.5L~2L / m2 on underground tunnels, belt transportation, coal and rock surfaces, near tunneling machine heads and other places prone to dust generation, which can effectively achieve the technical effect and purpose of reducing coal dust in mines and removing hydrogen sulfide gas.

[0069] Example 4

[0070] The wettable multifunctional dust suppressant for coal mines described in this embodiment is initially composed of component A and component B. The mass content of each component is as follows, in parts by mass:

[0071] Component A: 3 parts of ABEX AP470Z nonionic surfactant, 2 parts of Tween-80 nonionic surfactant, 1 part of Dow TRITON CF-10 nonionic low foaming wetting agent, 3 parts of Evonik Dynol 607 nonionic wetting agent, 2 parts of TEGO245 substrate wetting agent, 45 parts of glycerol, 0.4 parts of DU-125 defoaming agent, and 490 parts of industrial water.

[0072] Component B: 22 parts of pregelatinized cassava starch, 48 parts of high-viscosity yellow dextrin powder, 2 parts of sodium carbonate, 1 part of potassium carbonate, 0.5 parts of sodium hydroxide, and 480 parts of industrial water.

[0073] All raw materials in the A and B components are commercially available conventional chemical products.

[0074] The preparation method of the wet multifunctional dust suppressant for coal mines described in this embodiment is prepared according to the following steps:

[0075] Step 1: Preparation of component A

[0076] Take 490 parts of industrial water, add it to an 800-liter mixer with stirring, start stirring, control the stirrer speed at 30-40r / min, then add 3 parts of ABEX AP470Z nonionic surfactant, 2 parts of Tween-80 nonionic surfactant, 1 part of Dow TRITON CF-10 nonionic low-foaming wetting agent, 3 parts of Evonik Dynol 607 nonionic wetting agent, 2 parts of TEGO245 substrate wetting agent, 45 parts of glycerol, and 0.4 parts of DU-125 defoaming agent into the mixer in sequence, stir and mix evenly to obtain component A.

[0077] Step 2: Preparation of component B

[0078] Take 480 parts of industrial water, add it to an 800-liter mixer with stirring, turn on the stirring and heating system, control the stirrer speed at 30-40r / min, then evenly add 22 parts of pregelatinized cassava starch and 48 parts of high-viscosity yellow dextrin powder into the industrial water, mix and dissolve at 85-90°C, after the pregelatinized cassava starch and yellow dextrin powder are completely dissolved, cool to room temperature, then add 2 parts of sodium carbonate, 1 part of potassium carbonate and 0.5 part of sodium hydroxide into the mixing kettle, further stir and mix to dissolve evenly, and obtain component B.

[0079] Step 3: Preparation of Wetting Multifunctional Dust Suppressant for Coal Mine

[0080] When in use, add A and B in a mass ratio of 1:1 into a mixer of suitable volume and mix evenly to obtain a wetting multifunctional dust suppressant for coal mines. Then spray it at a spraying amount of 1.5L~2L / m2 on underground tunnels, belt transportation, coal and rock surfaces, near tunneling machine heads and other places prone to dust generation, which can effectively achieve the technical effect and purpose of reducing coal dust in mines and removing hydrogen sulfide gas.

[0081] Example 5

[0082] The wettable multifunctional dust suppressant for coal mines described in this embodiment is initially composed of component A and component B. The mass content and composition of each component are as follows, in terms of mass fractions:

[0083] Component A: 2 parts of ABEX AP470Z nonionic surfactant, 3 parts of Tween-80 nonionic surfactant, 2 parts of Dow TRITON CF-10 nonionic low foaming wetting agent, 3 parts of Evonik Dynol 607 nonionic wetting agent, 1 part of TEGO245 substrate wetting agent, 45 parts of glycerol, 0.3 parts of DU-125 defoaming agent, and 500 parts of industrial water.

[0084] Component B: 20 ​​parts of pregelatinized cassava starch, 46 parts of high-viscosity yellow dextrin powder, 2 parts of sodium carbonate, 3 parts of potassium carbonate, 0.2 parts of sodium hydroxide, and 480 parts of industrial water.

[0085] All raw materials in the A and B components are commercially available conventional chemical products.

[0086] The preparation method of the wet multifunctional dust suppressant for coal mines described in this embodiment is prepared according to the following steps:

[0087] Step 1: Preparation of component A

[0088] Take 500 parts of industrial water, add it into an 800-liter mixer with stirring, start stirring, control the stirrer speed at 30-40r / min, then add 2 parts of ABEX AP470Z nonionic surfactant, 3 parts of Tween-80 nonionic surfactant, 2 parts of Dow TRITON CF-10 nonionic low-foaming wetting agent, 3 parts of Evonik Dynol 607 nonionic wetting agent, 1 part of TEGO245 substrate wetting agent, 45 parts of glycerol, and 0.3 parts of DU-125 defoaming agent into the mixer in sequence, stir and mix evenly to obtain component A.

[0089] Step 2: Preparation of component B

[0090] Take 480 parts of industrial water, add it to an 800-liter mixer with stirring, turn on the stirring and heating system, control the stirrer speed at 30-40r / min, then evenly add 20 parts of pregelatinized cassava starch and 46 parts of high-viscosity yellow dextrin powder into the industrial water, mix and dissolve at 85-90°C, after the pregelatinized cassava starch and yellow dextrin powder are completely dissolved, cool to room temperature, then add 2 parts of sodium carbonate, 3 parts of potassium carbonate and 0.2 parts of sodium hydroxide into the mixing kettle, further stir and mix to dissolve evenly, and obtain component B.

[0091] Step 3: Preparation of a wetting multifunctional dust suppressant for coal mines

[0092] When in use, add A and B in a mass ratio of 1:1 into a mixer of suitable volume and mix evenly to obtain a wetting multifunctional dust suppressant for coal mines. Then spray it at a spraying amount of 1.5L~2L / m2 on underground tunnels, belt transportation, coal and rock surfaces, near tunneling machine heads and other places prone to dust generation, which can effectively achieve the technical effect and purpose of reducing coal dust in mines and removing hydrogen sulfide gas.

[0093] Example 6

[0094] The wettable multifunctional dust suppressant for coal mines described in this embodiment is initially composed of component A and component B. The mass content and composition of each component are as follows, in terms of mass fractions:

[0095] Component A: 2 parts of ABEX AP470Z nonionic surfactant, 3 parts of Tween-80 nonionic surfactant, 1 part of Dow TRITON CF-10 nonionic low foaming wetting agent, 2 parts of Evonik Dynol 607 nonionic wetting agent, 2 parts of TEGO245 substrate wetting agent, 48 parts of glycerol, 0.2 parts of DU-125 defoaming agent, and 490 parts of industrial water.

[0096] Component B: 24 parts of pregelatinized cassava starch, 43 parts of high-viscosity yellow dextrin powder, 3 parts of sodium carbonate, 1 part of potassium carbonate, 0.3 parts of sodium hydroxide, and 470 parts of industrial water.

[0097] All raw materials in the A and B components are commercially available conventional chemical products.

[0098] The preparation method of the wet multifunctional dust suppressant for coal mines described in this embodiment is prepared according to the following steps:

[0099] Step 1: Preparation of component A

[0100] Take 490 parts of industrial water, add it into an 800-liter mixer with stirring, start stirring, control the stirrer speed at 30-40r / min, then add 2 parts of ABEX AP470Z nonionic surfactant, 3 parts of Tween-80 nonionic surfactant, 1 part of Dow TRITON CF-10 nonionic low-foaming wetting agent, 2 parts of Evonik Dynol 607 nonionic wetting agent, 2 parts of TEGO245 substrate wetting agent, 48 parts of glycerol, and 0.2 parts of DU-125 defoaming agent into the mixer in sequence, stir and mix evenly to obtain component A.

[0101] Step 2: Preparation of component B

[0102] Take 470 parts of industrial water, add it to an 800-liter mixer with stirring, turn on the stirring and heating system, control the stirrer speed at 30-40r / min, then evenly add 24 parts of pregelatinized cassava starch and 43 parts of high-viscosity yellow dextrin powder into the industrial water, mix and dissolve at 85-90°C, after the pregelatinized cassava starch and yellow dextrin powder are completely dissolved, cool to room temperature, then add 3 parts of sodium carbonate, 1 part of potassium carbonate, and 0.3 parts of sodium hydroxide into the mixing kettle, further stir and mix to dissolve evenly, and obtain component B.

[0103] Step 3: Preparation of Wetting Multifunctional Dust Suppressant for Coal Mine

[0104] When in use, add A and B in a mass ratio of 1:1 into a mixer of suitable volume and mix evenly to obtain a wetting multifunctional dust suppressant for coal mines. Then spray it at a spraying amount of 1.5L~2L / m2 on underground tunnels, belt transportation, coal and rock surfaces, near tunneling machine heads and other places prone to dust generation, which can effectively achieve the technical effect and purpose of reducing coal dust in mines and removing hydrogen sulfide gas.

[0105] The various properties of the wettable multifunctional dust suppressant for coal mines of the present invention are shown in Table 1:

[0106] Table 1. Performance of wetting multifunctional dust suppressant for coal mines

[0107]

[0108]

Claims

1. A wetting type multifunctional dust suppressant for coal mines, characterized in that: It is composed of component A and component B. The mass content and composition of each component are as follows: Component A: 1-3 parts of ABEX AP470Z nonionic surfactant, 1-3 parts of Tween-80 nonionic surfactant, 1-2 parts of Dow TRITON CF-10 nonionic low-foaming wetting agent, 1-3 parts of Evonik Dynol 607 nonionic wetting agent, 1-2 parts of TEGO245 substrate wetting agent, 35-48 parts of glycerol, 0.2-0.5 parts of DU-125 defoaming agent, 470-510 parts of industrial water; Component B: 15-25 parts of pregelatinized cassava starch, 40-50 parts of high-viscosity yellow dextrin powder, 1-3 parts of sodium carbonate, 1-3 parts of potassium carbonate, 0.1-0.5 parts of sodium hydroxide, and 450-490 parts of industrial water.

2. A method for preparing the wettable multifunctional dust suppressant for coal mines according to claim 1, characterized in that: The A and B components are prepared according to the following steps: Step 1: Preparation of component A Take 470-510 parts of industrial water, add it to an 800-liter mixer with stirring, start stirring, control the stirring speed of the mixer at 30-40 r / min, then add 1-3 parts of ABEX AP470Z nonionic surfactant, 1-3 parts of Tween-80 nonionic surfactant, 1-2 parts of Dow TRITON CF-10 nonionic low-foaming wetting agent, 1-3 parts of Evonik Dynol 607 nonionic wetting agent, 1-2 parts of TEGO245 substrate wetting agent, 35-48 parts of glycerol, and 0.2-0.5 parts of DU-125 defoaming agent to the mixer, stir and mix evenly to obtain component A; Step 2: Preparation of component B Take 450-490 parts of industrial water, add it to an 800-liter mixer with stirring, turn on the stirring and heating system, control the stirrer speed at 30-40r / min, then evenly add 15-25 parts of pregelatinized cassava starch and 40-50 parts of high-viscosity yellow dextrin powder into the industrial water, mix and dissolve at 85-90°C, after the pregelatinized cassava starch and yellow dextrin powder are completely dissolved, cool to room temperature, then add 1-3 parts of sodium carbonate, 1-3 parts of potassium carbonate, and 0.1-0.5 parts of sodium hydroxide into the mixing kettle, further stir and mix to dissolve evenly, and obtain component B; Step 3: Preparation of wetting multifunctional dust suppressant for coal mines: Add the component A and component B prepared in the first and second steps in a mass ratio of 1:1 into a mixer of suitable volume and mix evenly to obtain a wetting multifunctional dust suppressant for coal mines.

3. The wettable multifunctional dust suppressant for coal mines according to claim 1, characterized in that: The raw materials in the A component and the B component are conventional chemical products sold on the market.

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