Open-pit coal mine truck transportation road dust suppressant for high-temperature dry environment and preparation method of open-pit coal mine truck transportation road dust suppressant

Abstract

The invention discloses an opencast coal mine truck transportation road dust suppressant for a high-temperature dry environment and a preparation method of the opencast coal mine truck transportation road dust suppressant. The dust suppressant is prepared by mixing 20-30% by mass of glucose, 0.05-0.15% by mass of a penetrant, 1.5-2.5% by mass of a water-retaining agent, 1.5-2.5% by mass of a moisture absorbent and the balance of water. The dust suppressant is an environment-friendly material, the main material glucose is a monosaccharide which is most widely distributed and most important in nature, and the dust suppressant has the characteristics of being non-toxic, odorless, green, environment-friendly, wide in source and application and the like. The dust suppressant integrates the functions of wetting, moisture absorption, water retention and the like, can keep dust on a road surface transported by a large mine truck of an open pit coal mine wet and effectively suppress flying dust on the road surface, is simple in preparation process, low in material cost, green and environment-friendly in material and wide in material source, and has good flowability and feasibility. The dust suppressant is applied to the open pit coal mine end slope transportation road, the environment quality and the traffic safety of the open pit coal mine can be effectively guaranteed, and the manpower and material resource investment of environment maintenance is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of road dust prevention and control, in particular to a road dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment and a preparation method thereof. Background Art

[0002] Currently, the primary method for controlling dust on open-pit coal mine road transport is sprinkling water. Due to the high temperature and high pressure caused by friction between the tires of large mining trucks and the ground, the duration of water sprinkling to suppress dust is generally short. This is especially true in the dry, hot summer months, where the duration of water sprinkling is even shorter. Within 3 to 15 minutes, the road surface moisture will completely dry out, losing its dust suppression effect. Therefore, the primary measure for suppressing dust on open-pit coal mine roads is to add environmentally friendly dust suppression components to enhance the water's anti-evaporation effect. Most existing dust suppressants are difficult to prepare and apply on-site in open-pit coal mines on a large scale due to their complex manufacturing processes, high material costs, and poor environmental friendliness. Therefore, it is crucial to develop a low-cost, simple, environmentally friendly, and highly effective dust suppressant for use on mining truck transport roads in high-temperature, dry environments, and its preparation method. Summary of the Invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a dust suppressant for open-pit coal mine truck transportation roads in a high-temperature dry environment and a preparation method thereof. The dust suppressant is sprayed onto the open-pit coal mine truck transportation road, which can achieve a good dust suppression effect during normal operation of the mine truck in a high-temperature dry environment and has strong anti-evaporation performance.

[0004] Technical solution: In order to solve the above technical problems, the present invention proposes a dust suppressant for mining truck transportation roads in a high-temperature dry environment. The dust suppressant is composed of a mixture of the following components in mass concentrations: 20-30% glucose, 0.05-0.15% penetrant, 1.5-2.5% water-retaining agent, 1.5-2.5% moisture absorbent, and the rest is water. The high temperature range is 50-70°C.

[0005] Furthermore, the penetrant is an anionic surfactant sodium dodecylbenzenesulfonate and / or 1-dodecyl-3-methylimidazolium bromide.

[0006] Furthermore, the water-retaining agent is glycerol and / or butylene glycol.

[0007] Furthermore, the desiccant is sodium chloride and / or calcium chloride.

[0008] On the other hand, the present invention also provides a method for preparing any of the above-mentioned open-pit coal mine truck transportation road dust suppressants for use in a high-temperature dry environment, which specifically comprises the following steps:

[0009] (1) Take 20-30% glucose granules, add the glucose granules to part of the water and stir evenly; then add 1.5-2.5% water retaining agent and stir until the solution is clear and transparent.

[0010] (2) Add 0.05-0.15% of penetrant and 1.5-2.5% of hygroscopic agent to the remaining amount of water and stir until they are completely dissolved and no particles are suspended.

[0011] (3) The solutions obtained in (1) and (2) are stirred and mixed evenly to obtain a finished dust suppressant for preventing and controlling dust on open-pit coal mine truck transportation roads.

[0012] Furthermore, the amount of water used in step (1) is 50-70% of the water content in the dust suppressant.

[0013] Furthermore, in step (2), the penetrant and the hygroscopic agent are completely dissolved until there are no suspended particles in the solution and then mixed with the above solution (1).

[0014] Beneficial technical effects: Compared with the prior art, the technical solution of the present invention has the following beneficial technical effects:

[0015] (1) The dust suppressant for open-pit coal mine truck transportation in high-temperature, dry environments of the present invention exhibits excellent wetting, moisture absorption, and water retention capabilities, extending the time that moisture remains in road dust. Laboratory tests under the same temperature and humidity conditions showed that the evaporation time of the dust suppressant was four times longer than that of deionized water, indicating that the dust suppressant of the present invention effectively prolonged the evaporation time of moisture.

[0016] (2) More than 99% of the components of the open-pit coal mine truck transportation road dust suppressant for high-temperature dry environments of the present invention are environmentally friendly materials. Its main ingredient, glucose, is the most widely distributed and most important monosaccharide in nature. It has the characteristics of being non-toxic and odorless, green and environmentally friendly, and having a wide range of sources and applications.

[0017] (3) The density of the dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment of the present invention is about 1.12×10 3 kg / m3, on-site dust suppressant spraying can be done with a mining sprinkler truck. Under the condition that the end-to-end transport road does not get muddy, the spraying cost is 0.73 yuan / m 2 There is a good dust suppression effect on the left and right.

[0018] (4) The dust suppressant for open-pit coal mine truck transportation in a high-temperature, dry environment of the present invention was used to conduct a practical application test on-site in an open-pit mine in a high-temperature, dry, and water-scarce region in northern China. The results show that the dust suppressant for open-pit coal mine truck transportation in a high-temperature, dry environment of the present invention has a significant wetting effect on road dust, can keep the road dust moist for a long time, and effectively prevent and control road dust. The dust suppressant has good anti-evaporation and water retention properties. Under hot and dry conditions in summer, the effective dust suppression time of spraying the dust suppressant once on the end road of an open-pit coal mine is 5 hours. Combined with the watering process, the transportation road under normal operating conditions of the mine truck can continue to be dust-free for three days, which can effectively reduce the content of suspended dust particles in the air of the mining area.

[0019] (5) The dust suppressant for high-temperature, dry open-pit coal mine truck transportation and its preparation method of the present invention exhibit excellent moisture retention, are low-cost, and demonstrate good field test results. Compared with other commercially available dust suppressant products, it has advantages such as convenient production and transportation and simple on-site preparation. Furthermore, compared with existing dust suppressants, it has the significant advantage of being applicable to open-pit mines.

[0020] (6) In order to reduce the water consumption and dust pollution in open-pit coal mines in high-temperature, dry and water-scarce areas, the dust suppressant of the present invention is used on site in combination with a watering process. By combining different watering methods, a three-day dust suppression effect is achieved by spraying the dust suppressant only once. The ground temperature of the open-pit mine in the field test is as high as 50°C in summer. The use of this dust suppressant can achieve a dust suppression effect of 5 hours. In order to verify whether the dust suppressant can play a dust suppression effect again after 5 hours of water use in the spraying area, a dust suppression dosage of 1L / m 2 and 0.5 L / m 2 The test results show that after watering again, 0.5L / m 2 The dust suppression effect in the area is 2.5h, 1L / m 2 The dust suppression effect in the area is 3.5 hours. In field tests, the dust suppressant of the present invention has reduced water consumption and dust pollution in open-pit mines without causing mechanical damage to mining trucks. After use, the road surface smoothness is very good. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0022] In order to facilitate understanding of the present invention, the present invention will be further described in detail below with reference to specific embodiments. The specific implementation examples described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Example 1

[0024] This embodiment provides a dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment, which is prepared by mixing the following components in mass concentrations: 20% glucose, 0.15% penetrant, 2.5% water-retaining agent, 1.5-2.5% moisture absorbent, and the remainder water.

[0025] Add glucose granules to 50% water and stir evenly, then add a water retaining agent and stir until the solution is clear and transparent to obtain a mixed solution A; add a penetrant and a hygroscopic agent to the remaining water and stir evenly until no particles are suspended to obtain a mixed solution B; mix the mixed solution A and the mixed solution B to obtain a dust suppressant.

[0026] The obtained dust suppressant was heated at 1.5 L / m 2 The spraying amount is sprayed on the sample or on the on-site transportation road, and its relevant performance is tested.

[0027] Example 2

[0028] This embodiment provides a dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment, which is prepared by mixing the following components in mass concentrations: 20% glucose, 0.15% penetrant, 1.68% water-retaining agent, 1.5-2.5% moisture absorbent, and the remainder water.

[0029] Add glucose granules to 50% water and stir evenly, then add a water retaining agent and stir until the solution is clear and transparent to obtain a mixed solution A; add a penetrant and a hygroscopic agent to the remaining water and stir evenly until no obvious particles are suspended to obtain a mixed solution B; mix the mixed solution A and the mixed solution B to obtain a dust suppressant.

[0030] The obtained dust suppressant was heated at 1.5 L / m 2 The spraying amount is sprayed on the sample or on the on-site transportation road, and its relevant performance is tested.

[0031] Example 3

[0032] This embodiment provides a dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment, which is prepared by mixing the following components in mass concentrations: 25% glucose, 0.15% penetrant, 2.5% water-retaining agent, 1.5-2.5% moisture absorbent, and the remainder water.

[0033] Add glucose granules to 50% water and stir evenly, then add a water retaining agent and stir until the solution is clear and transparent to obtain a mixed solution A; add a penetrant and a hygroscopic agent to the remaining water and stir evenly until no obvious particles are suspended to obtain a mixed solution B; mix the mixed solution A and the mixed solution B to obtain a dust suppressant.

[0034] The obtained dust suppressant was heated at 1.5 L / m 2 The spraying amount is sprayed on the sample or on the on-site transportation road, and its relevant performance is tested.

[0035] Example 4

[0036] This embodiment provides a dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment, which is prepared by mixing the following components in mass concentrations: 25% glucose, 0.15% penetrant, 1.68% water-retaining agent, 1.5-2.5% moisture absorbent, and the remainder water.

[0037] Add glucose granules to 50% water and stir evenly, then add a water retaining agent and stir until the solution is clear and transparent to obtain a mixed solution A; add a penetrant and a hygroscopic agent to the remaining water and stir evenly until no obvious particles are suspended to obtain a mixed solution B; mix the mixed solution A and the mixed solution B to obtain a dust suppressant.

[0038] The obtained dust suppressant was heated at 1.5 L / m 2 The spraying amount is sprayed on the sample or on the on-site transportation road, and its relevant performance is tested.

[0039] Example 5

[0040] This embodiment provides a dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment, which is prepared by mixing the following components in mass concentrations: 30% glucose, 0.15% penetrant, 2.5% water-retaining agent, 1.5-2.5% moisture absorbent, and the remainder water.

[0041] Add glucose granules to 50% water and stir evenly, then add a water retaining agent and stir until the solution is clear and transparent to obtain a mixed solution A; add a penetrant and a hygroscopic agent to the remaining water and stir evenly until no obvious particles are suspended to obtain a mixed solution B; mix the mixed solution A and the mixed solution B to obtain a dust suppressant.

[0042] The obtained dust suppressant was heated at 1.5 L / m 2 The spraying amount is sprayed on the sample or on the on-site transportation road, and its relevant performance is tested.

[0043] Example 6

[0044] This embodiment provides a dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment, which is prepared by mixing the following components in mass concentrations: 30% glucose, 0.15% penetrant, 1.68% water-retaining agent, 1.5-2.5% moisture absorbent, and the remainder water.

[0045] Add glucose granules to 50% water and stir evenly, then add a water retaining agent and stir until the solution is clear and transparent to obtain a mixed solution A; add a penetrant and a hygroscopic agent to the remaining water and stir evenly until no obvious particles are suspended to obtain a mixed solution B; mix the mixed solution A and the mixed solution B to obtain a dust suppressant.

[0046] The obtained dust suppressant was heated at 1.5 L / m 2 The spraying amount is sprayed on the sample or on the on-site transportation road, and its relevant performance is tested.

[0047] The high temperature (50-70° C.) dry environment dust suppressants for open-pit coal mine truck transportation prepared in Examples 1-6 were tested for relevant performance, and the test results were recorded in Table 1. The specific test method is as follows:

[0048] (1) Laboratory test method of spraying onto samples: The dust suppressant is evenly sprayed onto a culture dish containing dust from the sidewall transport road of an open-pit coal mine. The weight of the culture dish is recorded and then placed in a forced air drying oven. Dry the dish at 60°C for 8 hours, and the weight of the culture dish is recorded every hour. The moisture content and evaporation rate per hour are calculated.

[0049] (2) Test method of spraying on the on-site transport road: In the dry and hot summer, use a mining sprinkler truck to evenly spray the dust suppressant on the open-pit coal mine end transport road, observe and record the dust generation situation on the road under the normal operating conditions of the mining truck, test the moisture content of the road dust when the water-sprayed road surface is dry under the same spraying conditions, and then only spray water on the dust suppressant section according to the dust generation situation, and continue to observe the dust suppression situation for at least 3 days.

[0050] Table 1

[0051]

[0052]

[0053]

[0054] Table 2 Field test process

[0055]

[0056] The dust suppressant described in the present invention demonstrated a dust suppression effect of 8 hours in laboratory tests and 5 hours in field tests. Furthermore, combined with watering, the dust suppression effect lasted for three days during field tests. In field tests, spraying the dust suppressant once significantly reduced the total amount of suspended dust particles in the air. Five hours after spraying, the dust suppression effect was maintained by replenishing water. Under normal operating conditions in open-pit mines, the dust suppressant demonstrated its dust suppression effect even after various water replenishment methods, with the dust suppression effect lasting approximately three days. Furthermore, the dust suppressant described in the present invention offers the advantage of being harmless to soil compared to other chemical dust suppressants and having no impact on mine land reclamation. The dust suppressant for truck transport in open-pit coal mines in high-temperature, dry environments combines wetting, moisture absorption, and water retention, effectively keeping road dust moist for extended periods and effectively extending dust suppression time. Furthermore, the dust suppressant, composed of over 99% environmentally friendly materials, is non-toxic, odorless, inexpensive, highly effective, environmentally friendly, and has a simple manufacturing process.

Claims

1. A dust suppressant for mining truck transportation in a high-temperature dry environment, characterized in that: The dust suppressant is prepared by mixing the following components in mass concentration: 20-30% glucose, 0.05-0.15% penetrant, 1.5-2.5% water retaining agent, 1.5-2.5% moisture absorbent, and the rest is water. The high temperature range is 50-70°C.

2. The dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment according to claim 1, characterized in that: The penetrant is an anionic surfactant sodium dodecylbenzenesulfonate or 1-dodecyl-3-methylimidazolium bromide.

3. The dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment according to claim 1, characterized in that: The water retaining agent is glycerol or butylene glycol.

4. The dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment according to claim 1, characterized in that: The desiccant is sodium chloride or calcium chloride.

5. The dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment according to any one of claims 1 to 4, characterized in that: The dust suppressant is used by spraying.

6. A dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment according to any one of claims 1 to 4, characterized in that: The dosage of dust suppressant is 0.5 to 1.5 liters per square meter.

7. The method for preparing a dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) Take 20-30% glucose granules, add the glucose granules to part of the water and stir evenly; add 1.5-2.5% water retaining agent and stir until the solution is clear and transparent; (2) Add 0.05-0.15% of penetrant and 1.5-2.5% of hygroscopic agent to the remaining amount of water and stir until completely dissolved and no particles are suspended; (3) The solutions obtained in (1) and (2) are stirred and mixed to obtain a dust suppressant for open-pit coal mine truck transportation.

8. The method for preparing the dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment according to claim 7, characterized in that: In the step (1), the amount of water used is 50-70% of the water content in the dust suppressant.

9. The method for preparing the dust suppressant for open-pit coal mine truck transportation in a high-temperature dry environment according to claim 7, characterized in that: In the above (3), the penetrant and the hygroscopic agent are completely dissolved until there are no suspended particles in the solution and then mixed with the above (1) solution.

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