Dust suppressants, methods of making and using the same

Abstract

The application provides a dust suppressant and a preparation method and application thereof, and according to the weight percentage, the dust suppressant comprises the following components: 25-35% of sugarcane molasses, 0.5-1.5‰ of penetrating agent, 1.5-2.5% of hygroscopic agent, 1.5-2.5% of water-retaining agent, and the balance of water. The dust suppressant has multiple advantages. Firstly, the main material of the dust suppressant is sugarcane molasses, a by-product of sugar industry, which is low in price and widely available. More than 98% of the raw materials in the dust suppressant are environment-friendly materials, so the dust suppressant has the advantages of green environmental protection. Secondly, the dust suppressant can integrate the functions of adhesion, wetting, moisture absorption and water retention, can make the dust solidify, has good anti-damage performance, can effectively resist the interference of external force, inhibit the dust raising phenomenon, and has ideal dust suppression effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of open-pit coal mine environmental pollution control, in particular to a dust suppressant and a preparation method and application thereof. BACKGROUND

[0002] The open-pit mining mode is crucial to the guarantee of stable coal supply, but the serious dust pollution has always been a problem associated with open-pit mining. The serious dust pollution will threaten the health of employees and also affect the safety of mining operations. In the open-pit mining production operation, the dust raised by the mine transportation road surface is one of the most important dust pollution sources in the open-pit mine, and the dust yield accounts for 70-90% of the total dust yield of the mine. The end-slope road position is relatively fixed, has a long service life, and is mostly a non-paved rock-soil road, which is prone to dust under the rolling of heavy mining vehicles. Therefore, it is of great significance to control the dust raised by the end-slope road of the open-pit coal mine.

[0003] At present, the most commonly used method for suppressing the dust raised by the road in most open-pit coal mines is watering. Watering dust suppression can achieve good dust suppression effect to a certain extent, but it is easy to evaporate in the open-pit dry environment, the dust suppression time is short, and the open-pit mine road surface is simple. Frequent watering will further deteriorate the mine road, cause soil erosion, and further aggravate dust pollution. Chemical dust suppression has the effect of high efficiency and energy saving, but most dust suppressants cannot be mass-produced and applied in the actual application of the end-slope road of the open-pit coal mine due to complex process, high cost, poor universality, poor environmental friendliness, etc. The problem of road surface dust has not been solved.

[0004] Therefore, in order to effectively solve the problem of dust raised by the mine transportation road surface in the process of coal mining, it is urgent to develop a cheap and efficient, green and environmentally friendly composite environmental dust suppressant for the end-slope road of the open-pit coal mine. SUMMARY

[0005] The main purpose of the present application is to provide a dust suppressant and a preparation method and application thereof to solve the problem of dust raised by the mine transportation road surface in the process of coal mining.

[0006] In order to solve the above problems, the present application provides a dust suppressant, by weight percentage, the dust suppressant comprises: 25-35% of sugarcane molasses, 0.5-1.5‰ of penetrating agent, 1.5-2.5% of hygroscopic agent, 1.5-2.5% of water-retaining agent, and the balance is water.

[0007] Further, by weight percentage, the dust suppressant comprises: 30-35% of sugarcane molasses, 0.5-1.5‰ of penetrating agent, 1.5-2.5% of hygroscopic agent, 2.0-2.5% of water-retaining agent, and the balance is water; preferably, the sum of the weight percentages of the hygroscopic agent and the water-retaining agent is 3.5-4.5%.

[0008] Further, the water-retaining agent is glycerol and / or butanediol.

[0009] Further, the penetrating agent is an anionic surfactant.

[0010] Further, the anionic surfactant is sodium dodecyl benzene sulfonate.

[0011] Further, the hygroscopic agent is anhydrous calcium chloride and / or anhydrous magnesium chloride.

[0012] According to the second aspect of the present application, a preparation method of the dust suppressant is also provided, which comprises the following steps: S1, dissolving cane molasses in water and adding a water-retaining agent to obtain a mixed solution A; S2, dissolving a penetrating agent and a hygroscopic agent in the rest of water to obtain a mixed solution B; and S3, mixing the mixed solution A and the mixed solution B to obtain the dust suppressant.

[0013] Further, the amount of water used in step S1 is 50% to 70% of the content of water in the dust suppressant.

[0014] According to the third aspect of the present application, the dust suppressant is also provided as a dust suppressant for a mud-bound macadam road surface of a side slope of an open-pit coal mine.

[0015] According to the fourth aspect of the present application, a dust suppression treatment method for a mud-bound macadam road surface of a side slope of an open-pit coal mine is also provided, wherein the dust suppressant is sprayed on the mud-bound macadam road surface of the side slope of the open-pit coal mine by a mine sprinkler, and the single spraying amount is 1.5 to 1.8 L / m 2 .

[0016] The present application provides a dust suppressant for dust suppression of a mud-bound macadam road surface of a side slope of an open-pit coal mine, which comprises, by weight percentage, cane molasses 25 to 35%, a penetrating agent 0.5 to 1.5‰, a hygroscopic agent 1.5 to 2.5%, a water-retaining agent 1.5 to 2.5%, and the rest is water. The dust suppressant has many advantages, first, the main material of the dust suppressant is cane molasses, a by-product of sugar industry, which is cheap and widely available, and more than 98% of the raw materials of the dust suppressant are environmentally friendly materials, so the dust suppressant has the advantages of green and environmental protection. Second, the dust suppressant can integrate the functions of bonding, wetting, moisture absorption and water retention, can make the dust solidify, has good anti-damage performance, can effectively resist external strong interference, inhibit the dust raising phenomenon, and has ideal dust suppression effect. DETAILED DESCRIPTION

[0017] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments.

[0018] As described in the background section, the serious dust pollution problem in the process of open mining of coal resources will not only cause serious pollution to the environment, but also have serious impact on the safety of mining operation and the health of employees, and the dust yield of the mine transportation road in the process of open mining accounts for 70-90% of the total dust yield of the mine, so it is of great significance to control the dust of the end slope road of the open coal mine.

[0019] In order to solve the above problems, the present application provides a dust suppressant, by weight percentage, the dust suppressant comprises: 25-35% of sugarcane molasses, 0.5-1.5‰ of penetrating agent, 1.5-2.5% of hygroscopic agent, 1.5-2.5% of water-retaining agent, and the balance is water. The present application uses sugarcane molasses as the main binding component of the dust suppressant, and adds a penetrating agent to help the dust suppressant penetrate into the deep layer of the road dust, and adds a hygroscopic agent and a water-retaining agent to enhance the hygroscopicity and water-retaining property of the dust suppressant; mixing the sugarcane molasses, the penetrating agent, the hygroscopic agent and the water-retaining agent with water, and strictly controlling the proportions of the components in the above range, can make the components in the dust suppressant fully play their respective roles, and also make the components synergize with each other, further improve the comprehensive performance of the dust suppressant, so that the obtained dust suppressant has the functions of binding, wetting, hygroscopicity and water-retaining in one, and also has good anti-damage ability in the process of use, thereby having ideal dust suppression effect.

[0020] In particular, sugarcane molasses has good solubility and large binding performance, can be fully mixed with other components in the dust suppressant in water and synergize, can make the obtained dust suppressant not only have good binding performance, but also have good wetting performance, hygroscopicity and water-retaining performance, and have good anti-damage ability, so that the obtained dust suppressant has excellent comprehensive use performance. In addition, the sugarcane molasses in the dust suppressant of the present application is a by-product of sugar industry, has the advantages of wide source and low price, and can make the obtained dust suppressant have the characteristics of environmental friendliness and low cost, which is beneficial to batch production and large-scale use.

[0021] In a preferred embodiment, the dust suppressant comprises, by weight percentage, 30-35% of sugarcane molasses, 0.5-1.5‰ of penetrating agent, 1.5-2.5% of hygroscopic agent, 2.0-2.5% of water-retaining agent, and the balance being water. The addition amount of each component in the dust suppressant will affect the performance of the dust suppressant. Controlling each component in the dust suppressant within the above range can make the obtained dust suppressant have more excellent effects in terms of adhesion performance, wetting performance, hygroscopic performance, water-retaining performance, and damage resistance, etc. Preferably, the sum of the weight percentages of the hygroscopic agent and the water-retaining agent is 3.5-4.5%. Controlling the sum of the weight percentages of the hygroscopic agent and the water-retaining agent within the above range can make them better play a synergistic effect with the components such as sugarcane molasses, and further improve the above performance of the dust suppressant.

[0022] In a preferred embodiment, the water-retaining agent is glycerol and / or butanediol. The water-retaining performance of the dust suppressant can keep the dust suppressant maintain a certain water content during use, so that the dust suppressant can maintain good adhesion, dispersibility, and resistance to weathering, etc. The use of the above water-retaining agent in the present application can further improve the above performance of the dust suppressant.

[0023] In a preferred embodiment, the penetrating agent is an anionic surfactant. Selecting an anionic surfactant as the penetrating agent can be more conducive to the penetration of the dust suppressant into the deep layer of road dust, so that the dust is not easy to fly, thereby further improving the effect of inhibiting the spread of dust. By way of example but not limitation, the anionic surfactant is sodium dodecyl benzene sulfonate. Selecting the above type of anionic surfactant as the penetrating agent can make the obtained dust suppressant have better comprehensive performance.

[0024] In a preferred embodiment, the hygroscopic agent is one or more of anhydrous calcium chloride and / or anhydrous magnesium chloride. Selecting the above specific type of hygroscopic agent is conducive to the dust suppressant easily absorbing water in the air during use, so that the surface of the dust becomes wet, the friction between the molecules on its surface increases, and the dust suppression effect is further improved.

[0025] In a more preferred embodiment, by weight percentage, the dust suppressant comprises 35% of sugarcane molasses, 1‰ of sodium dodecyl benzene sulfonate as the penetrating agent, 2% of anhydrous calcium chloride as the hygroscopic agent, 2.5% of glycerol as the water-retaining agent, and the balance being water; or, by weight percentage, the dust suppressant comprises 35% of sugarcane molasses, 1‰ of sodium dodecyl benzene sulfonate as the penetrating agent, 1.5% of anhydrous calcium chloride as the hygroscopic agent, 2% of glycerol as the water-retaining agent, and the balance being water; or, 30% of sugarcane molasses, 1‰ of sodium dodecyl benzene sulfonate as the penetrating agent, 2.5% of anhydrous calcium chloride as the hygroscopic agent, 1.5% of glycerol as the water-retaining agent, and the balance being water.

[0026] According to another aspect of the present application, there is also provided a preparation method of the dust suppressant, comprising the following steps: S1, dissolving the sugar cane molasses in water and adding a water-retaining agent to obtain a mixed solution A; S2, dissolving a penetrating agent and a hygroscopic agent in the remaining water to obtain a mixed solution B; and S3, mixing the mixed solution A and the mixed solution B to obtain the dust suppressant. In the preparation method of the dust suppressant provided by the present application, the sugar cane molasses is first dissolved and mixed with the water-retaining agent to obtain the mixed solution A, and then the penetrating agent and the hygroscopic agent are dissolved and mixed to obtain the mixed solution B, and finally the mixed solution A and the mixed solution B are mixed to obtain the dust suppressant. In the above preparation method, the components in the dust suppressant can be better mixed, and the comprehensive use effect of the prepared dust suppressant can be further improved.

[0027] In a preferred embodiment, the amount of water used in step S1 is 50% to 70% of the water content in the dust suppressant. In the above preparation method, the sugar cane molasses is first dissolved with water accounting for 50% to 70% of the water content in the dust suppressant, and then the water-retaining agent is added to obtain the mixed solution A. Controlling the amount of water added in step S1 to be 50% to 70% of the water content in the dust suppressant can make the components in the mixed solution A mix better. The remaining amount of water is used to prepare the mixed solution B, and the components in the mixed solution B can also mix better, thereby making the obtained dust suppressant have better state and performance.

[0028] According to a third aspect of the present application, there is also provided an application of the above dust suppressant. The dust suppressant is used as a dust suppressant for the open-pit coal mine end slope mud-bound macadam road surface. In the use process, the dust suppressant has a significant binding effect on the road dust, can make the road dust aggregate into large particles, and after penetration, the dust is consolidated into blocks. At the same time, the dust suppressant has good water-retaining performance and anti-evaporation performance, can effectively resist external vehicle disturbance, and can maintain a dust-free road for more than 72 hours under the normal driving conditions of a mine area command vehicle (2.5t) and a pickup truck (4.4t), thereby having good dust suppression effect. The dust suppressant of the present application applied to the open-pit coal mine end slope transportation road can effectively protect the environmental protection and driving safety of the open-pit coal mine, and reduce the input of manpower and material resources in the environmental maintenance process.

[0029] According to another aspect of the present application, there is also provided a dust suppression treatment method for the open-pit coal mine end slope mud-bound macadam road surface, which comprises spraying the above obtained dust suppressant on the open-pit coal mine end slope mud-bound macadam road surface by a mine sprinkler, and the single spraying amount is 1.5 to 1.8 L / m 2 . The spraying method of the sprinkler is simple and fast, and the dust suppressant on the open-pit coal mine end slope mud-bound macadam road surface can be re-sprayed at any time when the effect of the dust suppressant is reduced. Controlling the spraying amount of the dust suppressant in the above range can achieve good dust suppression effect for a long time.

[0030] The application will be described in further detail below with reference to specific embodiments, which are not to be understood as limiting the scope of the application as claimed.

[0031] Example 1

[0032] A dust suppressant comprising sugarcane molasses 25%, penetrant 0.5‰, hygroscopic agent 2%, water-retaining agent 2%, and the balance being water. The penetrant is sodium dodecyl benzene sulfonate, the hygroscopic agent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0033] The sugarcane molasses is added to 50% water and stirred to mix, and then the water-retaining agent is added and stirred to mix, to obtain a mixed solution A. The penetrant and the hygroscopic agent are added to the balance of water and stirred to mix, to obtain a mixed solution B. The mixed solution A and the mixed solution B are mixed, to obtain the dust suppressant.

[0034] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5 L / m 2 , and the relevant performance is tested.

[0035] Example 2

[0036] A dust suppressant comprising sugarcane molasses 25%, penetrant 1.5‰, hygroscopic agent 2%, water-retaining agent 2%, and the balance being water. The penetrant is sodium dodecyl benzene sulfonate, the hygroscopic agent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0037] The sugarcane molasses is added to 70% water and stirred to mix, and then the water-retaining agent is added and stirred to mix, to obtain a mixed solution A. The penetrant and the hygroscopic agent are added to the balance of water and stirred to mix, to obtain a mixed solution B. The mixed solution A and the mixed solution B are mixed, to obtain the dust suppressant.

[0038] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5 L / m 2 , and the relevant performance is tested.

[0039] Example 3

[0040] A dust suppressant comprising sugarcane molasses 30%, penetrant 1‰, hygroscopic agent 2.5%, water-retaining agent 1.5%, and the balance being water. The penetrant is sodium dodecyl benzene sulfonate, the hygroscopic agent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0041] The sugarcane molasses is added to 50% water and stirred to mix, and then the water-retaining agent is added and stirred to mix, to obtain a mixed solution A. The penetrant and the hygroscopic agent are added to the balance of water and stirred to mix, to obtain a mixed solution B. The mixed solution A and the mixed solution B are mixed, to obtain the dust suppressant.

[0042] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5 L / m 2The spraying amount of the obtained dust suppressant is sprayed on the sample, and the related performance is tested.

[0043] Example 4

[0044] A dust suppressant comprises 30% of sugarcane molasses, 1.5‰ of penetrating agent, 1.5% of moisture absorbent, 1.5% of water-retaining agent, and the balance of water. The penetrating agent is sodium dodecyl benzene sulfonate, the moisture absorbent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0045] The sugarcane molasses is added to 50% water and stirred to obtain a mixed solution A. The penetrating agent and the moisture absorbent are added to the balance of water and stirred to obtain a mixed solution B. The mixed solution A and the mixed solution B are mixed to obtain the dust suppressant.

[0046] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5L / m 2 , and the related performance is tested.

[0047] Example 5

[0048] A dust suppressant comprises 35% of sugarcane molasses, 1‰ of penetrating agent, 2% of moisture absorbent, 2.5% of water-retaining agent, and the balance of water. The penetrating agent is sodium dodecyl benzene sulfonate, the moisture absorbent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0049] The sugarcane molasses is added to 50% water and stirred to obtain a mixed solution A. The penetrating agent and the moisture absorbent are added to the balance of water and stirred to obtain a mixed solution B. The mixed solution A and the mixed solution B are mixed to obtain the dust suppressant.

[0050] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.8L / m 2 , and the related performance is tested.

[0051] Example 6

[0052] A dust suppressant comprises 35% of sugarcane molasses, 1‰ of penetrating agent, 1.5% of moisture absorbent, 2% of water-retaining agent, and the balance of water. The penetrating agent is sodium dodecyl benzene sulfonate, the moisture absorbent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0053] The sugarcane molasses is added to 50% water and stirred to obtain a mixed solution A. The penetrating agent and the moisture absorbent are added to the balance of water and stirred to obtain a mixed solution B. The mixed solution A and the mixed solution B are mixed to obtain the dust suppressant.

[0054] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5L / m 2The spraying amount of the obtained dust suppressant is sprayed on the sample, and the related performance is tested.

[0055] Example 7

[0056] A dust suppressant comprises 35% of sugarcane molasses, 0.5‰ of penetrating agent, 2.5% of hygroscopic agent, 2% of water-retaining agent, and the balance of water. The penetrating agent is sodium dodecyl benzene sulfonate, the hygroscopic agent is anhydrous magnesium chloride, and the water-retaining agent is butanediol.

[0057] The sugarcane molasses is added to 50% of water and stirred to be uniform, and then the water-retaining agent is added and stirred to be mixed, to obtain a mixed solution A. The penetrating agent and the hygroscopic agent are added to the balance of water and stirred to be uniform, to obtain a mixed solution B. The mixed solution A and the mixed solution B are mixed, to obtain the dust suppressant.

[0058] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5 L / m 2 , and the related performance is tested.

[0059] Example 8

[0060] The difference between the example 8 and the example 6 is that the hygroscopic agent is 1.5%, and the water-retaining agent is 1.5%, and the sum of the two is 3%.

[0061] A dust suppressant comprises 35% of sugarcane molasses, 1‰ of penetrating agent, 1.5% of hygroscopic agent, 1.5% of water-retaining agent, and the balance of water. The penetrating agent is sodium dodecyl benzene sulfonate, the hygroscopic agent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0062] The sugarcane molasses is added to 50% of water and stirred to be uniform, and then the water-retaining agent is added and stirred to be mixed, to obtain a mixed solution A. The penetrating agent and the hygroscopic agent are added to the balance of water and stirred to be uniform, to obtain a mixed solution B. The mixed solution A and the mixed solution B are mixed, to obtain the dust suppressant.

[0063] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5 L / m 2 , and the related performance is tested.

[0064] Example 9

[0065] The difference between the example 9 and the example 6 is that the hygroscopic agent is 2.5%, and the water-retaining agent is 2.5%, and the sum of the two is 5%.

[0066] A dust suppressant comprises 35% of sugarcane molasses, 1‰ of penetrating agent, 2.5% of hygroscopic agent, 2.5% of water-retaining agent, and the balance of water. The penetrating agent is sodium dodecyl benzene sulfonate, the hygroscopic agent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0067] The molasses is added to 50% water and stirred to mix, then the water-retaining agent is added and stirred to mix, to obtain a mixed solution A; the penetrant and the hygroscopic agent are added to the remaining water and stirred to mix, to obtain a mixed solution B, the mixed solution A and the mixed solution B are mixed, to obtain the dust suppressant.

[0068] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5 L / m 2 , and the related performance is tested.

[0069] Example 10

[0070] A dust suppressant comprises 40% molasses, 2‰ penetrant, 1% hygroscopic agent, 1% water-retaining agent, and the remaining water. The penetrant is sodium dodecyl benzene sulfonate, the hygroscopic agent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0071] The molasses is added to 50% water and stirred to mix, then the water-retaining agent is added and stirred to mix, to obtain a mixed solution A; the penetrant and the hygroscopic agent are added to the remaining water and stirred to mix, to obtain a mixed solution B, the mixed solution A and the mixed solution B are mixed, to obtain the dust suppressant.

[0072] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5 L / m 2 , and the related performance is tested.

[0073] Example 11

[0074] A dust suppressant comprises 20% molasses, 0.2‰ penetrant, 3% hygroscopic agent, 3% water-retaining agent, and the remaining water. The penetrant is sodium dodecyl benzene sulfonate, the hygroscopic agent is anhydrous calcium chloride, and the water-retaining agent is glycerol.

[0075] The molasses is added to 50% water and stirred to mix, then the water-retaining agent is added and stirred to mix, to obtain a mixed solution A; the penetrant and the hygroscopic agent are added to the remaining water and stirred to mix, to obtain a mixed solution B, the mixed solution A and the mixed solution B are mixed, to obtain the dust suppressant.

[0076] Comparative Example 1

[0077] A dust suppressant comprises 1.5% water-soluble polymer, 1.0% penetrant, 45% hygroscopic and moisturizing agent, 2.5% preservative, and the remaining water. The water-soluble polymer is carboxymethyl starch, the penetrant is sodium dodecyl sulfonate, the hygroscopic and moisturizing agent is a mixture of anhydrous calcium chloride and glycerol in a weight ratio of 3:1, and the preservative is benzene propyl triazole.

[0078] Carboxymethyl starch is added to 20% water to swell for 2 hours, stirred and dissolved at 50°C for 20 minutes to obtain mixed solution A; calcium chloride dihydrate is added to the remaining water, stirred and dissolved uniformly, then glycerol, penetrant and preservative are added, stirred and dissolved uniformly to obtain mixed solution B, mixed solution A and mixed solution B are mixed to obtain the dust suppressant.

[0079] The obtained dust suppressant is sprayed on the sample at a spraying amount of 1.5L / m 2 , and the related performance is tested.

[0080] The dust suppressants prepared in examples 1 to 11 and comparative example 1 are tested for related performance, and the test results are recorded in table 1, and the specific test method is as follows: the open-pit coal mine road dust sample is placed in a sample dish, the dust suppressant is sprayed on the dust sample, the sample is placed in a forced air drying oven, heated at 70°C until the weight no longer changes, and the mass change is recorded every 15 minutes during the period, the evaporation rate of each time period is calculated, and the average value is taken as the final evaporation rate. The dried sample is destroyed using a pressure gauge, and the pressure at which the sample is broken is recorded to obtain the breaking strength.

[0081] Table 1

[0082]

[0083]

[0084] The dust suppressants prepared in examples 1 and comparative example 1 are applied to the site of the end-slope mud-bound macadam road surface of Haerwusun open-pit coal mine at a spraying amount of 1.8L / m 2 , and the actual application test is carried out, and the results are as follows:

[0085] Example 1 is a dust suppressant prepared by using the formula and method of the present application, which is used for the end-slope mud-bound macadam road surface of open-pit coal mine. The results show that the dust suppressant has a significant binding effect on the dust of the end-slope mud-bound macadam road surface of open-pit coal mine, can make the dust of the road surface solidify, has good anti-evaporation performance, has water retention for a long time, and can keep the road dust-free for more than 72h under the normal driving conditions of mine command vehicles (2.5t) and pickup trucks (4.4t), and has good dust suppression effect.

[0086] Comparative example 1 is a dust suppressant prepared by using a conventional method and formula, which is used for the end-slope mud-bound macadam road surface of open-pit coal mine. The dust suppressant not only has poor water retention performance, but more importantly, has poor anti-damage ability during use. Under the normal driving conditions of mine command vehicles (2.5t) and pickup trucks (4.4t), there is obvious dusting phenomenon only after 8h, and the dust suppression effect cannot meet the needs of actual application.

[0087] From the above description, it can be seen that the dust suppressants prepared by using the formulations described in the application in Embodiments 1 to 9 have lower evaporation rates and better water retention performance, which can enable the dust suppressants to maintain good adhesion, dispersibility and weather resistance during use, and is conducive to the dust suppression effect of the dust suppressants in a long time. In addition, the obtained dust suppressants also exhibit excellent breaking strength performance, which enables the obtained dust suppressants to resist the impact of external forces during use, especially when the above dust suppressants are used for open-pit coal mine end slope mud-bound macadam road surface, the road can remain free of dust for a long time under the normal driving conditions of mine area command vehicles (2.5 t) and pickup trucks (4.4 t). The addition amounts of the components in the preparation of the dust suppressants in Embodiments 10 and 11 are not within the range described in the application, and the effect is slightly worse than that of Embodiments 1 to 9, and the obtained dust suppressants cannot simultaneously ensure good breaking strength and good water retention performance. The dust suppressant prepared by using the relatively conventional formulation in Comparative Example 1 has poor water retention performance and breaking strength performance, and when it is actually used for open-pit coal mine end slope mud-bound macadam road surface, it cannot maintain good dust suppression effect for a long time.

[0088] The above only describes the preferred embodiments of the application and is not intended to limit the application. The application can be variously changed and modified for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A dust suppressant, characterized in that, The dust suppressant comprises, by weight percentage, 30-35% of sugarcane molasses, 0.5-1.5‰ of penetrating agent, 1.5-2.5% of hygroscopic agent, 2.0-2.5% of water-retaining agent, and the balance of water; and the sum of the weight percentages of the hygroscopic agent and the water-retaining agent is 3.5-4.5%, the water-retaining agent is glycerol and / or butanediol, the penetrating agent is sodium dodecyl benzene sulfonate, and the hygroscopic agent is anhydrous calcium chloride and / or anhydrous magnesium chloride.

2. A method of producing the dust suppressing agent according to claim 1, characterized by, The preparation method comprises the following steps: S1, dissolving sugarcane molasses in water and adding a water-retaining agent to obtain a mixed solution A; S2, dissolving a penetrating agent and a hygroscopic agent in the balance of water to obtain a mixed solution B; S3, mixing the mixed solution A and the mixed solution B to obtain the dust suppressant.

3. The method of claim 2, wherein the dust suppressant is prepared by mixing the water and the polymer in a ratio of 1 : 1 to 1 :

10. The water used in the step S1 accounts for 50-70% of the water content in the dust suppressant.

4. Application of the dust suppressant of claim 1 as a dust suppressant for an open-pit coal mine end-slope mud-bound macadam pavement.

5. A dust suppression treatment method for a coal mine surface open pit side slope clay-bound macadam pavement, characterized in that, The dust suppressant of claim 1 is sprayed on the end slope mud-bound gravel road surface of the open-pit coal mine by a mine sprinkler, and the single spraying amount is 1.5-1.8 L / m 2 .

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