Hard-water-resistant efficient anti-corrosion foam dust suppressant for coal mine and preparation method of foam dust suppressant

Abstract

The invention discloses a hard-water-resistant efficient anti-corrosion foam dust suppressant for a coal mine and a preparation method of the hard-water-resistant efficient anti-corrosion foam dust suppressant, and the dust suppressant consists of the following components in percentage by weight: 6.0-12.0% of polyoxyethylene fatty acid ester serving as a surfactant, 0.5-2.0% of citric acid serving as a chelating agent, 0.5-2.5% of phytic acid serving as a corrosion inhibitor, 2.0-5.0% of polyether modified siloxane serving as a foam stabilizer and the balance of water. 0.2%-0.8% of carboxymethyl cellulose serving as a foam booster, 0.5%-2.0% of nano cellulose serving as an auxiliary additive and the balance of deionized water; the preparation method comprises the following steps: heating the deionized water, adding the citric acid, then adding the surfactant, heating for dissolving, then sequentially adding the corrosion inhibitor, the foam stabilizer and the foam booster, and finally adding the nano-cellulose. The preparation process is simple, the cost is low, the production process is safe and environment-friendly, and the prepared dust suppressant has excellent hard water adaptability, strong corrosion resistance and foam stability.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine dust prevention and control, and particularly relates to a hard water resistant, high-efficiency, anti-corrosion foam dust suppressant for coal mines and a preparation method thereof. Background Art

[0002] During coal mining and transportation, the generation of large amounts of dust has become a major issue that restricts the sustainable development of the industry and threatens the health of workers. Dust not only causes serious pollution to the air quality of the mining area and the surrounding ecological environment, but can also cause respiratory diseases in coal mining operations, such as occupational diseases such as pneumoconiosis, and even trigger dust explosions at certain concentrations, posing a huge safety hazard. Therefore, how to efficiently and economically suppress dust dispersion has become a core technical problem that the coal mining industry urgently needs to solve. In this context, foam dust suppression technology has gradually become an important technical means for coal mine dust control due to its strong coverage, good dust adsorption capacity and long continuous effective time. However, the existing foam dust suppressants for coal mines still have many technical bottlenecks in actual application, and they are in urgent need of further optimization and breakthroughs.

[0003] First, the water source conditions in coal mining operations are relatively complex, usually dominated by hard water, which contains large amounts of calcium and magnesium ions. These hardness ions will react adversely with the active components in the foam dust suppressant, resulting in a significant reduction in the foam formation efficiency or even complete failure. At the same time, hard water will significantly weaken the stability of the foam, making it impossible for the foam to form an effective and lasting covering layer on the dust source, thus seriously affecting the dust suppression effect. To solve this problem, many coal mines have to introduce additional softening water treatment equipment or use expensive special water sources, which greatly increases the cost of governance, especially in remote mining areas, where this method is almost impossible to implement. Therefore, the insufficient hard water resistance of existing dust suppressants has become one of the main obstacles to the further development of foam dust suppression technology.

[0004] Secondly, dust suppressants in coal mining operations need to be transported and sprayed through metal equipment, and most existing foam dust suppressants lack specialized designs for corrosion resistance. Chemical components in some dust suppressants, such as chloride ions and sulfates, can significantly corrode metal pipes and equipment. This corrosion not only shortens the lifespan of equipment but can also cause equipment failure or leakage, increase maintenance costs, and even threaten operational safety. Furthermore, the high humidity and high temperature differentials in coal mining environments further exacerbate the corrosion rate of metals, exacerbating the problem. Therefore, developing a dust suppressant with highly effective corrosion resistance is of great practical significance for extending equipment life, reducing maintenance frequency, and ensuring operational safety.

[0005] Thirdly, the complex and ever-changing operating environment of coal mines places higher demands on the performance of foam dust suppressants. Unfavorable factors in coal mines, such as high dust concentrations, strong airflow disturbances, and large temperature fluctuations, often make it difficult for existing foam dust suppressants to maintain their stability. This manifests itself in problems such as rapid foam collapse, uneven coverage, and reduced dust absorption capacity. These performance deficiencies directly lead to unstable dust suppression effectiveness. Especially under long-term operating conditions, the performance of existing dust suppressants degrades significantly, making them unable to meet the long-term dust control requirements of coal mining.

[0006] Finally, with increasingly stringent environmental regulations, the coal mining industry is placing higher demands on the environmental and economical performance of dust suppressants. However, existing foam dust suppressants still have shortcomings in this regard. For example, many dust suppressants contain non-degradable or difficult-to-degrade chemical components, potentially causing soil and water pollution upon use. Furthermore, some high-efficiency dust suppressants rely on expensive imported raw materials or complex manufacturing processes, resulting in high market prices that are unaffordable for small and medium-sized coal mining enterprises. These factors have limited the widespread adoption and promotion of existing foam dust suppressants.

[0007] In summary, existing coal mine foam dust suppressants have significant deficiencies in key performance aspects such as hard water resistance, corrosion resistance, foam stability, and environmental friendliness, making them unable to fully adapt to the complex operating conditions and increasingly stringent environmental protection requirements of coal mines. Therefore, developing a coal mine foam dust suppressant that can maintain high performance in hard water environments, possess excellent corrosion resistance, and be both environmentally friendly and economical is of great significance for improving the overall efficiency of coal mine dust control and reducing environmental pollution in mining areas. Summary of the Invention

[0008] The purpose of the present invention is to provide a hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines and a preparation method thereof. The preparation process is simple, the cost is low, and the production process is safe and environmentally friendly. The prepared dust suppressant can simultaneously have excellent hard water adaptability, strong corrosion resistance and foam stability, and has excellent comprehensive performance.

[0009] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is: a hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines, composed of the following components in weight percentage: surfactant polyoxyethylene fatty acid ester 9.0%-12.0%, chelating agent citric acid 1.0%-2.0%, corrosion inhibitor phytic acid 0.8%-1.5%, foam stabilizer polyether modified silicone 2.0%-3.5%, foam enhancer carboxymethyl cellulose 0.4%-0.8%, auxiliary additive nanocellulose 0.8%-1.2%, and the rest is deionized water.

[0010] Preferably, it is composed of the following components in weight percentage: 12.0% of surfactant polyoxyethylene fatty acid ester, 1.0% of chelating agent citric acid, 1.5% of corrosion inhibitor phytic acid, 2.0% of foam stabilizer polyether modified silicone, 0.4% of foam enhancer carboxymethyl cellulose, 1.2% of auxiliary additive nanocellulose, and the rest is deionized water.

[0011] In order to achieve the above-mentioned object of the invention, the present invention also provides a method for preparing the above-mentioned hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines, comprising the following steps:

[0012] (1) Heat deionized water to 50°C-60°C according to the weight ratio, add chelating agent citric acid and stir until completely dissolved, and adjust the pH value to 5.5-6.2;

[0013] (2) adding the surfactant polyoxyethylene fatty acid ester to the solution obtained in step (1) according to a weight ratio under stirring, and stirring at 0° C.-70° C. until the solution is completely dissolved and becomes transparent;

[0014] (3) adding phytic acid as a corrosion inhibitor, polyether-modified siloxane as a foam stabilizer, and carboxymethyl cellulose as a foam enhancer to the solution obtained in step (2) in order by weight, and continuing stirring for 15-30 minutes to uniformly disperse the components to obtain a mixed solution;

[0015] (4) dissolving the nanocellulose in deionized water and slowly adding the solution to the mixed solution prepared in step (3), and continuing to stir for 15-30 minutes; finally cooling to room temperature and mixing evenly to obtain a hard water resistant and highly efficient anti-corrosion foam dust suppressant.

[0016] Preferably, in step (1), dilute hydrochloric acid or sodium hydroxide solution with a concentration of 0.1-0.2% is used to adjust the pH value.

[0017] Preferably, in step (1), the stirring speed is set to 300-400 rpm.

[0018] The foam dust suppressant of the present invention uses polyoxyethylene fatty acid ester as a surfactant to provide excellent foam generation ability, and is combined with citric acid as a chelating agent to effectively complex calcium and magnesium ions in hard water, significantly improving hard water resistance. By adding phytic acid as a corrosion inhibitor, a protective film can be formed on the metal surface, greatly reducing the corrosion risk of equipment. Polyether-modified siloxane is used as a foam stabilizer, which synergizes with a carboxymethyl cellulose (CMC) foaming agent and a nanocellulose auxiliary additive to improve the elasticity, durability and covering performance of the foam, so that the foam has stronger anti-collapse ability and long-lasting dust suppression effect in complex coal mine operating environments.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The present invention forms a composite dust suppressant with excellent hard water adaptability, strong corrosion resistance and foam stability by scientifically optimizing the component ratio and preparation process. The dust suppressant of the present invention can maintain high foam stability and duration (more than 120 minutes) under hard water environment, and the foam coverage effect is excellent, significantly improving the dust suppression effect in coal mine operation, while effectively suppressing the corrosion of metal equipment by the added corrosion inhibitor. Through performance testing, the foam stability of the dust suppressant under hard water conditions is better than the prior art, and the metal corrosion inhibition rate can reach more than 94%, showing strong comprehensive performance and application potential. In addition, the dust suppressant of the present invention is based on degradable environmentally friendly materials as the main component, with a degradation rate of more than 90%, which meets the requirements of modern environmental protection laws and regulations, and meets the economic requirements of large-scale promotion by optimizing production costs. The foam dust suppressant of the present invention has excellent comprehensive performance, can effectively reduce dust pollution, improve work environment safety, and extend the service life of related equipment, and can be widely used in dust control scenes such as coal mining, transportation and storage, providing a kind of efficient, environmentally friendly and economical dust control scheme for the coal mining industry. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to specific embodiments.

[0022] Example 1

[0023] The invention discloses a hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines, which is composed of the following components in percentage by weight: 10.0% of a surfactant polyoxyethylene fatty acid ester, 1.5% of a chelating agent citric acid, 0.8% of a corrosion inhibitor phytic acid, 3.0% of a foam stabilizer polyether modified siloxane, 0.5% of a foam enhancer carboxymethyl cellulose, 1.0% of an auxiliary additive nanocellulose, and the remainder being deionized water.

[0024] The preparation method of the above-mentioned hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines comprises the following steps:

[0025] (1) Heat deionized water to 50°C according to the weight ratio, add chelating agent citric acid and stir until completely dissolved, and adjust the pH value to 5.5;

[0026] (2) adding the surfactant polyoxyethylene fatty acid ester to the solution obtained in step (1) according to a weight ratio under stirring, and stirring at 60° C. until it is completely dissolved or the solution becomes transparent;

[0027] (3) adding phytic acid as a corrosion inhibitor, polyether-modified silicone as a foam stabilizer, and carboxymethyl cellulose as a foam enhancer to the solution obtained in step (2) in order by weight, and continuing to stir at 60° C. for 30 min to uniformly disperse the components to obtain a mixed solution;

[0028] (4) dissolving the nanocellulose in a small amount of deionized water, slowly adding the solution formed into the mixed solution prepared in step (3), and continuing to stir for 30 minutes; finally cooling to room temperature and mixing evenly to obtain a hard water resistant and highly efficient anti-corrosion foam dust suppressant.

[0029] To verify the good performance of the hard water resistant, highly effective, and corrosion resistant foam dust suppressant for coal mines prepared in this example, a series of standardized performance tests were performed. The following is a specific protocol for testing the performance of the foam dust suppressant, including testing methods for foam stability, dust suppression effectiveness, hard water resistance, corrosion inhibition, and other physical and chemical properties.

[0030] 1. Foam stability test

[0031] Foam stability is an important indicator for evaluating whether a foam dust suppressant can maintain its foam form for a long time. The test method is as follows:

[0032] Test method: Use a foam stability tester (such as Foam Stability Tester) to measure the half-life of the foam.

[0033] Test steps: Take a certain amount of dust suppressant solution and mix it with air at the specified concentration. Under certain conditions (temperature, humidity, and pressure), generate foam and record the foam volume. Measure the change in foam volume every 10 minutes until the foam stability drops to half of the original foam volume.

[0034] Performance indicators: The foam stability half-life is greater than 30 minutes, ensuring that the foam is stable for a long time and prevents it from disappearing quickly.

[0035] 2. Dust suppression effect test

[0036] The dust suppression effect test is mainly to evaluate the actual application effect of foam dust suppressants in coal mine operations and test their ability to suppress coal dust.

[0037] Test method: Use coal dust suppression equipment (such as spray equipment) to evaluate the dust suppression effect.

[0038] Test steps: Use a standard coal dust source and set a set amount of coal dust release. Spray a foam dust suppressant in the dust release area and record changes in dust concentration. Use a laser particle size analyzer or smoke detector to measure the coal dust concentration in the air in real time and compare the difference in coal dust concentration before and after spraying.

[0039] Performance indicators: Dust suppression efficiency reaches more than 85%, that is, the coal dust concentration drops by at least 85%.

[0040] 3. Hard water resistance test

[0041] Since coal mine water sources usually contain a high content of hard water, testing the hard water resistance of foam dust suppressants is a key indicator for evaluating their actual application effect.

[0042] Test method: Use hard water samples to test the anti-hard water performance of dust suppressants.

[0043] Test steps: Prepare water samples of different hardness (such as those containing high concentrations of calcium and magnesium ions). Add the foam dust suppressant solution into the hard water, observe the foam generation and foam stability, and measure the foam stability and durability to ensure that the foam is not easy to collapse in hard water.

[0044] Performance indicators: The foam is not easy to break and can maintain foam stability for at least 5 minutes; the foam volume is maintained at not less than 50% in hard water.

[0045] 4. Anti-corrosion performance test

[0046] The anti-corrosion performance test is used to evaluate the protective effect of foam dust suppressants on coal mining equipment, especially the anti-corrosion effect on metal equipment.

[0047] Test method: Salt spray corrosion test.

[0048] Test Procedure: Select a standard metal sample (such as steel) and expose it to an environment containing a foam dust suppressant solution. Place the sample in a salt spray corrosion chamber and conduct a continuous salt spray corrosion test. Maintain a relative humidity of 95% and a temperature of 35°C for 48 hours. Regularly inspect the metal surface for corrosion, and record the corrosion area and corrosion rate.

[0049] Performance indicators: The corrosion area and corrosion rate are less than 1 / 3 of the unprotected metal samples, ensuring that the foam dust suppressant has a significant anti-corrosion effect on metal equipment.

[0050] 5. Adhesion test

[0051] Adhesion testing is used to evaluate the adhesion of foam dust suppressants to coal mine working surfaces (such as coal ore or coal piles) to ensure that they can effectively adhere to coal dust and prevent dust from flying.

[0052] Test method: Adhesion tester (such as Peel Test) is used for measurement.

[0053] Test steps: Sample the surface of a coal pile, apply a foam dust suppressant, and let it sit for 30 minutes. Measure the adhesion of the foam dust suppressant to the coal pile using an adhesion tester. Record the destructive force of the foam during adhesion and the integrity of the remaining foam.

[0054] Performance indicators: The adhesion of the foam dust suppressant should be greater than 1.5N / cm to ensure its effective adhesion and long-term stability.

[0055] 6. pH test

[0056] pH testing is used to ensure that the pH of the foam dust suppressant is within the appropriate range to avoid adverse effects on coal mine equipment or personnel.

[0057] Test method: Use a pH meter to test the solution acidity and alkalinity.

[0058] Test steps: Take a sample of the foam dust suppressant solution. Measure the pH of the solution using a pH meter. Adjust the pH to the appropriate range (6.5-7.5).

[0059] Performance indicators: pH value should be between 6.5-7.5 to ensure it is safe for equipment and personnel.

[0060] 7. Persistence Test

[0061] The durability test is used to evaluate the service life and stability of foam dust suppressants in actual applications.

[0062] Test method: Evaluate its weather resistance and stability through long-term open air environment exposure test.

[0063] Test steps: Spray the foam dust suppressant onto a test area exposed to the external environment, simulating actual coal mine operating conditions. The foam stability, dust suppression effectiveness, and foam volume are tested at regular intervals.

[0064] Performance indicators: The dust suppression effect and foam stability of the foam dust suppressant remain above 50% within 12 hours.

[0065] Product performance test results:

[0066] Foam stability: The foam stability test method was used to evaluate the retention of foam over different time periods. The foam duration was tested according to the ASTM D1173 standard test method, and the results showed that the foam stability was 96 hours.

[0067] Dust suppression effect: dust concentration is reduced from 300mg·m -3 , down to 32 mg·m -3 , the dust suppression efficiency reached 89.3%.

[0068] Hard water resistance: The initial foaming capacity of the foam in the tested hard water concentration is 76% of the pure water solution, and the foam capacity decreases by less than 5% after 10 minutes.

[0069] Anti-corrosion performance: The corrosion area is less than 1 / 4 of the unprotected metal sample, and the corrosion rate is less than 1 / 3 of the unprotected metal sample, which is within the applicable range.

[0070] Adhesion test: The adhesion of the foam dust suppressant is 2.5N / cm, which is within the applicable range.

[0071] pH value test: pH value is 7.3, which is within the applicable range.

[0072] Persistence test: Standard foam stability analysis was performed using the modified Ross-Miles method. The foam stability remained at 54% over 12 hours, which is within the applicable range.

[0073] Example 2

[0074] The invention discloses a hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines, which is composed of the following components in percentage by weight: 9.0% of a surfactant polyoxyethylene fatty acid ester, 2.0% of a chelating agent citric acid, 1.0% of a corrosion inhibitor phytic acid, 3.5% of a foam stabilizer polyether modified siloxane, 0.8% of a foam enhancer carboxymethyl cellulose, 0.8% of an auxiliary additive nanocellulose, and the remainder being deionized water.

[0075] The preparation method of the above-mentioned hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines comprises the following steps:

[0076] (1) Heat deionized water to 50°C according to the weight ratio, add chelating agent citric acid and stir until completely dissolved, and adjust the pH value to 6.0;

[0077] (2) adding the surfactant polyoxyethylene fatty acid ester to the solution obtained in step (1) according to the weight ratio under stirring, and stirring at 0° C. until it is completely dissolved and the solution becomes transparent;

[0078] (3) adding phytic acid as a corrosion inhibitor, polyether-modified silicone as a foam stabilizer, and carboxymethyl cellulose as a foam enhancer to the solution obtained in step (2) in order by weight, and continuing to stir at 0° C. for 30 min to uniformly disperse the components to obtain a mixed solution;

[0079] (4) dissolving the nanocellulose in a small amount of deionized water, slowly adding the solution formed into the mixed solution prepared in step (3), and continuing to stir for 15 minutes; finally cooling to room temperature and mixing evenly to obtain a hard water resistant and highly efficient anti-corrosion foam dust suppressant.

[0080] The product prepared in this embodiment was subjected to performance testing using the same testing method as in Example 1. The performance test results are as follows:

[0081] Foam stability: The foam stability test method was used to evaluate the retention of foam over different time periods. The foam duration was tested according to the ASTM D1173 standard test method, and the results showed that the foam stability was 72 hours.

[0082] Dust suppression effect: dust concentration is reduced from 300mg·m-3 , down to 29 mg·m -3 , the dust suppression efficiency reaches 90.3%.

[0083] Hard water resistance: The initial foaming volume of the foam in the tested hard water concentration is 69% of the pure water solution, and the foam volume decreases by less than 6% after 10 minutes.

[0084] Anti-corrosion performance: The corrosion area is less than 1 / 4 of the unprotected metal sample, and the corrosion rate is less than 1 / 3 of the unprotected metal sample, which is within the applicable range.

[0085] Adhesion test: The adhesion of the foam dust suppressant is 3.6N / cm, which is within the applicable range.

[0086] pH value test: pH value is 7.1, which is within the applicable range.

[0087] Persistence Test: Standard foam stability analysis was performed using the modified Ross-Miles method. The foam stability remained at 50% for 12 hours, which is within the applicable range.

[0088] Example 3

[0089] The invention discloses a hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines, which is composed of the following components in percentage by weight: 12.0% of a surfactant polyoxyethylene fatty acid ester, 1.0% of a chelating agent citric acid, 1.5% of a corrosion inhibitor phytic acid, 2.0% of a foam stabilizer polyether modified siloxane, 0.4% of a foam enhancer carboxymethyl cellulose, 1.2% of an auxiliary additive nanocellulose, and the remainder being deionized water.

[0090] The preparation method of the above-mentioned hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines comprises the following steps:

[0091] (1) Heat deionized water to 60°C according to the weight ratio, add chelating agent citric acid and stir until completely dissolved, and adjust the pH value to 6.2;

[0092] (2) adding the surfactant polyoxyethylene fatty acid ester to the solution obtained in step (1) according to a weight ratio under stirring, and stirring at 70° C. until the surfactant is completely dissolved or the solution becomes transparent;

[0093] (3) adding phytic acid as a corrosion inhibitor, polyether-modified silicone as a foam stabilizer, and carboxymethyl cellulose as a foam enhancer to the solution obtained in step (2) in order by weight, and continuing to stir at 70° C. for 30 min to uniformly disperse the components to obtain a mixed solution;

[0094] (4) dissolving the nanocellulose in a small amount of deionized water, slowly adding the solution formed into the mixed solution prepared in step (3), and continuing to stir for 20 minutes; finally cooling to room temperature and mixing evenly to obtain a hard water resistant and efficient anti-corrosion foam dust suppressant.

[0095] The product prepared in this embodiment was subjected to performance testing using the same testing method as in Example 1. The performance test results are as follows:

[0096] Foam stability: The foam stability test method was used to evaluate the retention of foam over different time periods. The foam duration was tested according to the ASTM D1173 standard test method, and the results showed that the foam stability was 120 hours.

[0097] Dust suppression effect: dust concentration is reduced from 300mg·m -3 , down to 18 mg·m -3 , the dust suppression efficiency reaches 94%.

[0098] Hard water resistance: The initial foaming volume of the foam in the tested hard water concentration is 86% of the pure water solution, and the foam volume decreases by less than 3% after 10 minutes.

[0099] Anti-corrosion performance: The corrosion area is less than 1 / 4 of the unprotected metal sample, and the corrosion rate is less than 1 / 3 of the unprotected metal sample, which is within the applicable range.

[0100] Adhesion test: The adhesion of the foam dust suppressant is 1.9N / cm, which is within the applicable range.

[0101] pH value test: pH value is 7.7, which is within the applicable range.

[0102] Durability test: Standard foam stability analysis was performed using the modified Ross-Miles method. The foam stability remained at 61% over 12 hours, which is within the applicable range.

Claims

1. A hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines, characterized in that: The invention is composed of the following components in percentage by weight: 9.0%-12.0% of a surfactant polyoxyethylene fatty acid ester, 1.0%-2.0% of a chelating agent citric acid, 0.8%-1.5% of a corrosion inhibitor phytic acid, 2.0%-3.5% of a foam stabilizer polyether modified silicone, 0.4%-0.8% of a foam enhancer carboxymethyl cellulose, 0.8%-1.2% of an auxiliary additive nanocellulose, and the remainder is deionized water.

2. The hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines according to claim 1, characterized in that: The invention is composed of the following components in percentage by weight: 12.0% of a surfactant polyoxyethylene fatty acid ester, 1.0% of a chelating agent citric acid, 1.5% of a corrosion inhibitor phytic acid, 2.0% of a foam stabilizer polyether modified silicone, 0.4% of a foam enhancer carboxymethyl cellulose, 1.2% of an auxiliary additive nanocellulose, and the remainder is deionized water.

3. A method for preparing the hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines according to claim 1, characterized in that: The following steps are involved: (1) Heat deionized water to 50-60°C according to the weight ratio, add chelating agent citric acid and stir until completely dissolved, and adjust the pH value to 5.5-6.2; (2) adding the surfactant polyoxyethylene fatty acid ester to the solution obtained in step (1) according to a weight ratio under stirring, and stirring at 0° C.-70° C. until the solution is completely dissolved and becomes transparent; (3) adding phytic acid as a corrosion inhibitor, polyether-modified siloxane as a foam stabilizer, and carboxymethyl cellulose as a foam enhancer to the solution obtained in step (2) in order by weight, and continuing stirring for 15-30 minutes to uniformly disperse the components to obtain a mixed solution; (4) dissolving the nanocellulose in deionized water and slowly adding the solution to the mixed solution prepared in step (3), and continuing to stir for 15-30 minutes; finally cooling to room temperature and mixing evenly to obtain a hard water resistant and highly efficient anti-corrosion foam dust suppressant.

4. The method for preparing a hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines according to claim 3, characterized in that: In step (1), the pH value is adjusted using dilute hydrochloric acid or sodium hydroxide solution with a concentration of 0.1-0.2%.

5. The method for preparing a hard water resistant and highly effective anti-corrosion foam dust suppressant for coal mines according to claim 3 or 4, characterized in that: In step (1), the stirring speed is set to 300-400 rpm.