Corrosion and scale inhibition atomization dust suppressant for coal mine as well as preparation method and application of corrosion and scale inhibition atomization dust suppressant

Abstract

The invention provides a coal mine corrosion and scale inhibition atomization dust suppressant as well as a preparation method and application thereof, and belongs to the technical field of dust suppressants. The coal mine corrosion and scale inhibition atomization dust suppressant is prepared from the following raw materials in percentage by mass: 16% of a corrosion and scale inhibitor, 12% of a wetting agent, 6% of a tackifier and the balance of water, the corrosion and scale inhibitor is prepared from polyaspartic acid and glucosyl salt. The coal mine corrosion and scale inhibition atomization dust suppressant is environment-friendly and non-toxic, and harmless to the environment and the health of workers; coal dust can be effectively inhibited, and coal mining and transportation sites are kept clean; the corrosion to equipment and pipelines is small, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of dust suppressants, and in particular to a coal mine corrosion and scale inhibition atomized dust suppressant and a preparation method and application thereof. Background Art

[0002] In the process of coal mining and transportation, the generation of coal dust is an inevitable problem. Coal dust not only poses a serious threat to the health of workers, but also pollutes the environment. Therefore, finding an efficient dust suppressant has become one of the focuses of the coal mining industry.

[0003] At present, there are various types of dust suppressants on the market, such as liquid, solid and atomizer. However, there are some problems in the practical application of these dust suppressants. First, some dust suppressants are harmful to the environment, contain toxic substances, and cause secondary pollution. Secondly, the use effect of some dust suppressants is not ideal, and they cannot effectively suppress the generation of coal dust in a short time. In addition, some dust suppressants are corrosive and will cause damage to ore equipment and pipelines.

[0004] Therefore, it is necessary to develop a new type of coal mine corrosion and scale inhibition atomization dust suppressant to solve the above problems. This dust suppressant should have the following characteristics: environmentally friendly and non-toxic, can effectively inhibit the generation of coal dust, reduce corrosion to equipment and pipelines, and be easy to use. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a coal mine corrosion and scale inhibition atomized dust suppressant and its preparation method and application. In addition to having the efficient wetting and dust reduction performance of common dust suppressants, the coal mine corrosion and scale inhibition atomized dust suppressant of the present invention has excellent corrosion resistance, can effectively prevent the underground coal mine atomization water from corroding pipes and nozzles, and is environmentally friendly and non-toxic.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The invention provides a coal mine corrosion and scale inhibition atomized dust suppressant, which is prepared from raw materials including the following mass percentages: 16% of corrosion and scale inhibitor, 12% of wetting agent, 6% of viscosity enhancer, and the rest is water; the corrosion and scale inhibitor is prepared from polyaspartic acid and glucosyl salt.

[0008] Preferably, the mass ratio of the polyaspartic acid to the glucosyl salt is 1:0.05.

[0009] Preferably, the raw materials for preparing the corrosion and scale inhibitor further include methionine, and the mass ratio of the polyaspartic acid, the glucosyl salt and the methionine is 60:25:15.

[0010] Preferably, the glucosyl salt comprises one or more of calcium gluconate, magnesium gluconate and zinc gluconate.

[0011] Preferably, the wetting agent includes one or more of polyoxyethylene ether, dioctyl sodium sulfosuccinate, sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

[0012] Preferably, the wetting agent comprises polyoxyethylene ether, dioctyl sodium sulfonated succinate and sodium lauryl sulfate, and the mass ratio of polyoxyethylene ether, dioctyl sodium sulfonated succinate and sodium lauryl sulfate in the wetting agent is 5:2:3.

[0013] Preferably, the viscosity increasing agent is konjac glucomannan.

[0014] The present invention also provides a method for preparing the coal mine corrosion and scale inhibition atomized dust suppressant described in the above technical solution, comprising the following steps:

[0015] The polyaspartic acid and the glucosyl salt are mixed and modified to obtain a corrosion and scale inhibitor;

[0016] mixing the wetting agent with a portion of the water to obtain a wetting agent solution;

[0017] Mixing the corrosion and scale inhibitor, the wetting agent solution, the viscosity enhancer, the remaining water and the solubilizing agent to obtain a mixed solution;

[0018] The solubilizing agent in the mixed solution is removed to obtain the coal mine corrosion and scale inhibition atomized dust suppressant.

[0019] The present invention also provides the use of the coal mine corrosion inhibition, scale inhibition, atomized dust suppressant described in the above technical solution or the coal mine corrosion inhibition, scale inhibition, atomized dust suppressant prepared by the preparation method described in the above technical solution in the process of coal mining and transportation.

[0020] Preferably, the application includes atomizing the coal mine corrosion and scale inhibition atomized dust suppressant.

[0021] The invention provides a coal mine corrosion and scale inhibition atomized dust suppressant, which is prepared from raw materials including the following mass percentages: 16% of corrosion and scale inhibitor, 12% of wetting agent, 6% of viscosity enhancer, and the rest is water; the corrosion and scale inhibitor is prepared from polyaspartic acid and glucosyl salt.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The coal mine corrosion and scale inhibition atomized dust suppressant provided by the present invention, by adding polyaspartic acid, a thickener (konjac glucomannan) and a glucose salt, utilizes the synergistic effect and compatibility formed by monomers and their combination, the corrosion and scale inhibition agent can reduce the corrosiveness of the dust suppressant to equipment and pipelines, and at the same time can prevent the ions in the water from being deposited on the nozzle pipe wall to form scale, causing the nozzle channel to be blocked and the wall surface smoothness to be reduced, so that the atomization resistance is increased, the atomization effect is reduced and the nozzle is damaged, and the surface tension can be reduced while achieving efficient wetting and dust reduction, and the atomization particle size can be reduced to enhance the capture effect of respirable dust, so as to keep the coal mining and transportation site clean. In addition, the reagents used all have a certain corrosion inhibition effect, reduce the equipment corrosion caused by the dust reduction water with high ion concentration in the atomized spraying mine, and extend the service life of the equipment. At the same time, the coal mine corrosion inhibition and scale prevention atomized dust suppressant of the present invention has the ability to chelate polyvalent metal ions such as calcium, magnesium, copper, and iron, reduce the concentration and amount of free polyvalent metal ions in the dust suppressant solution, and reduce the ability to form scale, so as to prevent scale from clogging the tiny atomizing holes of the atomizing nozzle and causing spray failure. During the on-site application of the dust suppressant, the dust suppressant is added to the dust suppression water network by the dust suppressant adding device to reduce the surface tension of the aqueous solution and prevent equipment corrosion and atomizing nozzle clogging caused by the atomized dust suppression liquid; it is environmentally friendly and non-toxic, and harmless to the environment and the health of workers. The coal mine corrosion inhibition and scale prevention atomized dust suppressant of the present invention can solve the problems existing in the prior art, and has the advantages of environmental protection, high efficiency and economy. Therefore, the invention has broad application prospects and commercial value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 These are the results of the contact angle experiment. The left side shows the coal mine corrosion and scale inhibition atomized dust suppressant ZJS-2, and the right side shows a comparative example. DETAILED DESCRIPTION

[0025] The invention provides a coal mine corrosion and scale inhibition atomized dust suppressant, which is prepared from raw materials including the following mass percentages: 16% of corrosion and scale inhibitor, 12% of wetting agent, 6% of viscosity enhancer, and the rest is water; the corrosion and scale inhibitor is prepared from polyaspartic acid and glucosyl salt.

[0026] In the present invention, the mass ratio of the polyaspartic acid to the glucosyl salt is preferably 1:0.05.

[0027] In the present invention, the raw material for preparing the corrosion and scale inhibitor also preferably includes methionine, and the mass ratio of the polyaspartic acid, the glucosyl salt and the methionine is preferably 60:25:15. When the raw material includes methionine, the coal mine corrosion and scale inhibitor atomized dust suppressant is used when operating on copper pipelines.

[0028] In the present invention, the glucosyl salt preferably includes one or more of calcium gluconate, magnesium gluconate and zinc gluconate.

[0029] In the present invention, the wetting agent preferably includes one or more of polyoxyethylene ether, dioctyl sodium sulfosuccinate, sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

[0030] In the present invention, the wetting agent preferably includes polyoxyethylene ether, sodium sulfonated succinate dioctyl ester and sodium lauryl sulfate, and the mass ratio of polyoxyethylene ether, sodium sulfonated succinate dioctyl ester and sodium lauryl sulfate in the wetting agent is preferably 5:2:3.

[0031] In the present invention, the viscosity increasing agent is preferably konjac glucomannan.

[0032] The present invention also provides a method for preparing the coal mine corrosion and scale inhibition atomized dust suppressant described in the above technical solution, comprising the following steps:

[0033] The polyaspartic acid and the glucosyl salt are mixed and modified to obtain a corrosion and scale inhibitor;

[0034] mixing the wetting agent with a portion of the water to obtain a wetting agent solution;

[0035] Mixing the corrosion and scale inhibitor, the wetting agent solution, the viscosity enhancer, the remaining water and the solubilizing agent to obtain a mixed solution;

[0036] The solubilizing agent in the mixed solution is removed to obtain the coal mine corrosion and scale inhibition atomized dust suppressant.

[0037] The present invention has no particular limitation on the amount of the partial water, as long as the wetting agent can be completely dissolved.

[0038] In the present invention, the solubilizer is preferably ethanol. The present invention has no particular limitation on the amount of ethanol used, as long as the amount of ethanol can completely dissolve the corrosion and scale inhibitor, wetting agent solution, viscosity enhancer and remaining water.

[0039] In the present invention, it is preferred to remove the solubilizing agent in the mixed solution by evaporation.

[0040] The present invention preferably adds the corrosion inhibitor and scale inhibitor and the viscosity enhancer to the wetting agent solution, mixes and stirs, and then uses a high-speed shear disperser to heat to 50°C, stirs at 25000 rpm for 15 minutes, and then adds the water and ethanol, mixes and stirs for 25 minutes, and then stands for 2 hours until the foam disappears, thereby obtaining the coal mine corrosion inhibitor, scale inhibitor and atomized dust suppressant.

[0041] The present invention also provides the use of the coal mine corrosion inhibition, scale inhibition, atomized dust suppressant described in the above technical solution or the coal mine corrosion inhibition, scale inhibition, atomized dust suppressant prepared by the preparation method described in the above technical solution in the process of coal mining and transportation.

[0042] In the present invention, the application preferably includes atomizing the coal mine corrosion and scale inhibition atomized dust suppressant.

[0043] The present invention has no particular limitation on the specific method of atomization, and any method well known to those skilled in the art may be used.

[0044] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Coal mining operations are very special due to the high temperature, high relative humidity, and serious corrosion of mechanical equipment. Metal corrosion protection during dust reduction is very necessary. If the chemical dust suppressant is not suitable, it will cause certain corrosion to mechanical equipment such as spray equipment and coal mining machines during the spraying process, shortening the service life of underground equipment. Therefore, it is necessary to prepare chemical dust suppressants to test the corrosion.

[0046] The corrosion resistance test method of the present invention is:

[0047] The corrosion of dust suppression water was tested using the JB / T7901-1999 metal material laboratory uniform corrosion full immersion test method, and the corrosion rate was used to evaluate the corrosion of dust suppressants to metal materials. The M18 nut of the coal mining machine was used as the corroded sample in the corrosion test, and the weight was recorded as M 0 . Use a beaker to hold 100mL of dust suppressant solution and mine dust suppression water prepared with different concentration ratios of mine water, and completely immerse the M18 nut sample in the liquid. Set the corrosion time to 336h, and repeat each group of experiments three times. After the predetermined time is reached, take out the corroded M18 nut sample from the beaker, wash it with deionized water, and blow it dry with a hair dryer, and weigh it as M. The calculation formula for the corrosion rate is as follows:

[0048]

[0049] Where: M 0 M is the mass of the sample before the experiment, g; M is the mass of the sample after the experiment, g.

[0050] Common mineral ions in mine water mainly include Ca 2+ 、Na + , K + , CO 3 2-In the long-term water delivery process of the mine spray water system, water is often heated as an energy conversion medium. The inner walls of containers such as evaporation boilers and tap water pipelines will form a layer of hard sediment scale. The water used in the production process has high hardness and many impurities, which are easy to adhere to the surface of control parts and actuators, increasing movement resistance, aggravating the wear of parts and shortening the life of components and parts. When there are more impurities in water, it is conducive to the reproduction of microorganisms and bacteria, which causes damage to the health of mine workers. For example, the nozzle of the key atomization part has pipe metal inside the nozzle, and the dust suppression water contains different impurities to form electrochemical corrosion, which destroys the anode metal. The anode loses electrons to form hydrogen ions at the cathode. The discharge solution loses hydrogen ions at the cathode, and the OH ions increase. The metal ions in the solution form low-valent hydroxides of the metal Fe(OH) 2 , Fe(OH) 2 It is further oxidized by dissolved oxygen in water to generate Fe(OH) 3 Scaling precipitation.

[0051] The scale formation characteristics of dust suppression water were tested, and the standard method described in GB / T 16632-2019 Determination of scale inhibition performance of water treatment agents-Calcium carbonate deposition method was used to conduct a laboratory calcium carbonate deposition test on metal materials. The scale inhibition performance was used to evaluate the scaling properties of the dust suppressant on metal materials.

[0052] Example 1

[0053] The coal mine corrosion, scale and dust inhibitor atomization agent is prepared from the following substances in percentage by mass: 16% corrosion and scale inhibitor, 12% wetting agent, 6% viscosity enhancer, and the rest is deionized water; the corrosion and scale inhibitor is prepared from 60wt% polyaspartic acid, 25wt% zinc gluconate and 15wt% methionine; the viscosity enhancer is 100wt% konjac glucomannan; the wetting agent is 50wt% polyoxyethylene ether, 20wt% sodium salt of dioctyl sulfosuccinate and 30wt% sodium dodecyl sulfate.

[0054] The preparation steps are as follows:

[0055] The polyaspartic acid powder, zinc gluconate powder and methionine powder were uniformly mixed using a resonance mixer for 30 minutes to form a mixed powder.

[0056] Deionized water was measured and heated to 50° C., polyoxyethylene ether, sodium dioctyl sulfosuccinate and sodium dodecyl sulfate were added, and after mixing evenly, ultrasonic dispersion was performed using an ultrasonic dispersion instrument for 15 minutes to form a base liquid 1 with a stable emulsion structure.

[0057] Base liquid 1 was added with konjac glucan and mixed powder, mixed and stirred, and then heated to 50° C. using a high-speed shear disperser, and stirred at 25,000 rpm for 15 min to obtain base liquid 2.

[0058] Add deionized water and ethanol into the base liquid 2, mix and stir for 25 minutes, and then stand for 2 hours until the foam disappears, thereby obtaining a coal mine corrosion and scale inhibition atomized dust suppressant (denoted as ZJS).

[0059] The prepared coal mine corrosion inhibition, scale inhibition and atomized dust suppressant was prepared into 0.05wt%, 0.1wt% and 0.15wt% solutions, respectively recorded as ZJS-1, ZJS-2 and ZJS-3, and performance tests were carried out.

[0060] Taking the common chemical dust suppressant SDS with a concentration of 0.05wt% as a comparative example, the difference in effect between the common chemical dust suppressant and the coal mine corrosion and scale inhibition atomized dust suppressant of the present invention is compared, and a comparative analysis is conducted on the wetting effect, corrosion inhibition effect and scale inhibition effect.

[0061] The wetting effect was analyzed by contact angle test, and the results are as follows: Figure 1 As shown, Figure 1 The droplet on the left is the coal mine corrosion inhibition, scale inhibition and atomized dust suppressant ZJS-2 of the present invention, and the droplet on the right is a comparative example. It can be seen that the contact angle of the coal mine corrosion inhibition, scale inhibition and atomized dust suppressant of the present invention interacting with the coal dust substrate is significantly smaller than that of the comparative example, indicating that the coal mine corrosion inhibition, scale inhibition and atomized dust suppressant of the present invention has a better wetting effect on coal dust than common dust suppressants, and has a strong ability to change the hydrophobicity of the coal dust interface. It is better than conventional dust suppressants and has dust suppression performance.

[0062] The comparison of corrosion inhibition effects is shown in Table 1. It can be seen that SDS at a concentration of 0.05 wt% has a certain corrosion inhibition effect, but its corrosion inhibition performance is lower than the corrosion inhibition effect of the present invention at the same mass concentration.

[0063] Table 1 Comparison of corrosion inhibition effects

[0064]

[0065] The comparison of scale inhibition effect is shown in Table 2. It can be seen that SDS with a concentration of 0.05wt% has a certain scale inhibition effect, but its scale inhibition performance is lower than the scale inhibition effect of the present invention at the same mass concentration.

[0066] Table 2 Comparison of scale inhibition effect

[0067]

[0068] The comparison of the corrosion inhibition effects of ZJS-1, ZJS-2 and ZJS-3 of the present invention is shown in Table 3.

[0069] Table 3 Comparison of corrosion inhibition effects of ZJS-1, ZJS-2 and ZJS-3

[0070]

[0071] The comparison of the scale inhibition effects of ZJS-1, ZJS-2 and ZJS-3 of the present invention is shown in Table 4.

[0072] Table 4 Comparison of scale inhibition effects of ZJS-1, ZJS-2 and ZJS-3

[0073]

[0074] In summary, the coal mine corrosion and scale inhibition atomized dust suppressant of the present invention has the following advantages: it is environmentally friendly and non-toxic, and harmless to the environment and the health of workers; it can effectively inhibit the generation of coal dust and keep the coal mining and transportation sites clean; it has low corrosiveness to equipment and pipelines, and extends the service life of the equipment; and it has good corrosion and scale inhibition effects.

[0075] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A coal mine corrosion and scale inhibition atomization dust suppressant, characterized in that: The invention is prepared from raw materials including the following percentages by mass: 16% corrosion and scale inhibitor, 12% wetting agent, 6% viscosity enhancer, and the rest is water; the corrosion and scale inhibitor is prepared from polyaspartic acid and glucosyl salt.

2. The coal mine corrosion and scale inhibition atomized dust suppressant according to claim 1, characterized in that: The mass ratio of the polyaspartic acid to the glucosyl salt is 1:0.

05.

3. The coal mine corrosion and scale inhibition atomized dust suppressant according to claim 1, characterized in that: The raw materials for preparing the corrosion and scale inhibitor also include methionine, and the mass ratio of the polyaspartic acid, the glucosyl salt and the methionine is 60:25:

15.

4. The coal mine corrosion and scale inhibition atomized dust suppressant according to claim 1, characterized in that: The glucosyl salt includes one or more of calcium gluconate, magnesium gluconate and zinc gluconate.

5. The coal mine corrosion and scale inhibition atomized dust suppressant according to claim 1, characterized in that: The wetting agent includes one or more of polyoxyethylene ether, dioctyl sodium sulfonated succinate, sodium dodecyl sulfate and sodium dodecylbenzene sulfonate.

6. The coal mine corrosion and scale inhibition atomized dust suppressant according to claim 5, characterized in that: The wetting agent comprises polyoxyethylene ether, sodium sulfonated succinate dioctyl ester and sodium lauryl sulfate, and the mass ratio of polyoxyethylene ether, sodium sulfonated succinate dioctyl ester and sodium lauryl sulfate in the wetting agent is 5:2:

3.

7. The coal mine corrosion and scale inhibition atomized dust suppressant according to claim 1, characterized in that: The viscosity increasing agent is konjac glucomannan.

8. The method for preparing the coal mine corrosion and scale inhibition atomized dust suppressant according to any one of claims 1 to 7, characterized in that: The following steps are involved: The polyaspartic acid and the glucosyl salt are mixed and modified to obtain a corrosion and scale inhibitor; mixing the wetting agent with a portion of the water to obtain a wetting agent solution; Mixing the corrosion and scale inhibitor, the wetting agent solution, the viscosity enhancer, the remaining water and the solubilizing agent to obtain a mixed solution; The solubilizing agent in the mixed solution is removed to obtain the coal mine corrosion and scale inhibition atomized dust suppressant.

9. Use of the coal mine corrosion inhibition, scale inhibition, and atomized dust suppressant according to any one of claims 1 to 7 or the coal mine corrosion inhibition, scale inhibition, and atomized dust suppressant prepared by the preparation method according to claim 8 in the process of coal mining and transportation.

10. The use according to claim 9, characterized in that: The application includes atomizing the coal mine corrosion and scale inhibition atomized dust suppressant.

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