Moistening agent for coal mine spray and dust reduction and preparation method

Abstract

The invention discloses a moistening agent for coal mine spray and dust reduction and a preparation method thereof. The moistening agent is prepared from 3% to 5% of lignosulfonate, 3% to 5% of vinylacetate, 3% to 5% of 2-acrylamide-2-methyl propanesulfonic acid, 0.05% to 0.1% of an initiator, 0.02% to 0.04% of a crosslinking agent, 0.3% to 0.6% of an antifreezing agent, 0.2% to 0.4% of a corrosion inhibitor and the balance of water, wherein sodium lignosulphonate is utilized as a matrix to perform polymerization reaction with vinyl acetate and 2-acrylamide-2-methyl propanesulfonic acid, so that generated polymer not only keeps degradable performance of sodium lignosulphonate, but also can make fog drops have moistening and bonding functions. When the moistening agent for coal mine sprayand a surface active agent are compounded to be applied into a spray system, wettability of spray to coal dust is further improved, the fog drops can effectively moisten and wrap the dust; thus, the dust suppression efficiency is greatly improved, and dust dispersion is reduced; furthermore, the moistening agent can be naturally decomposed, so that the situation of secondary pollution caused by dust fall is prevented from happening.

Description

technical field

[0001] The invention relates to the field of dust prevention and suppression in mines, in particular to a moisturizer for coal mine spray dust suppression and a preparation method. Background technique

[0002] With the advancement of science and technology, the degree of mechanization and automation of coal mining is getting higher and higher, and the dust generated in this process is also increasing. Coal mine dust is one of the main disaster sources that seriously endanger the safety of underground production and the health of personnel. The hazards of coal dust mainly include the following aspects: first, spontaneous combustion or even explosion may occur under certain conditions, which may easily lead to gas explosion accidents; As the concentration of respirable dust increases, it seriously threatens the physical and mental health of underground workers in coal mines, and greatly increases the probability of suffering from pneumoconiosis and other lung ...

Examples

preparation example Construction

[0024] The present invention also provides a kind of preparation method of above-mentioned wetting agent, such as figure 1 As shown, it includes the following steps:

[0025] Step 1, after dissolving the lignosulfonate in water, add vinyl acetate, set the temperature of the constant temperature stirrer to 60°C and stir for 30 minutes, and then add the initiator to the above solution after fully dissolving and mixing. React at 60°C for 2 hours to obtain the first solution;

[0026]

[0027] Step 2, adding 2-acrylamide-2-methylpropanesulfonic acid and a crosslinking agent to the first solution to continue the reaction for 1 hour to obtain the final product;

[0028]

[0029] Step 3: Add antifreeze and corrosion inhibitor to the final product, stir thoroughly and evenly, and adjust the pH value to obtain the above-mentioned wetting agent.

Embodiment 1

[0032] Weigh 2g of sodium lignosulfonate and 4ml of vinyl acetate and dissolve them in 200ml of water. After fully dissolving and stirring for 30 minutes, add 0.5g of ammonium persulfate to the solution, and react at a constant temperature of 60°C for 2 hours. Add 2 g of 2-acrylamide-2-methylpropanesulfonic acid and 0.5 g of N-N methylenebisacrylamide to the solution, keep stirring at 60° C. for 2 hours. After the reaction is completed, add 0.3g calcium chloride and 0.2ml phosphorus carboxylic acid to the solution to adjust the pH, take 2ml and 0.2g dodecyl dimethyl betaine and add it into 1L water and mix evenly, and test the relevant properties.

Embodiment 2

[0034] Weigh 2g of sodium lignosulfonate and 4ml of vinyl acetate and dissolve them in 200ml of water. After fully dissolving and stirring for 30 minutes, add 0.5g of ammonium persulfate to the solution, and react at a constant temperature of 60°C for 2 hours. Add 4 g of 2-acrylamide-2-methylpropanesulfonic acid and 0.5 g of N-N methylenebisacrylamide to the solution, keep stirring at 60° C. for 2 hours. After the reaction is completed, add 0.3g calcium chloride and 0.2ml phosphorus carboxylic acid to the solution to adjust the pH, take 2ml and 0.2g dodecyl dimethyl betaine and add it into 1L water and mix evenly, and test the relevant properties.

technical field

[0001] The invention relates to the field of dust prevention and suppression in mines, in particular to a moisturizer for coal mine spray dust suppression and a preparation method. Background technique

[0002] With the advancement of science and technology, the degree of mechanization and automation of coal mining is getting higher and higher, and the dust generated in this process is also increasing. Coal mine dust is one of the main disaster sources that seriously endanger the safety of underground production and the health of personnel. The hazards of coal dust mainly include the following aspects: first, spontaneous combustion or even explosion may occur under certain conditions, which may easily lead to gas explosion accidents; As the concentration of respirable dust increases, it seriously threatens the physical and mental health of underground workers in coal mines, and greatly increases the probability of suffering from pneumoconiosis and other lung ...

Examples

preparation example Construction

[0024] The present invention also provides a kind of preparation method of above-mentioned wetting agent, such as figure 1 As shown, it includes the following steps:

[0025] Step 1, after dissolving the lignosulfonate in water, add vinyl acetate, set the temperature of the constant temperature stirrer to 60°C and stir for 30 minutes, and then add the initiator to the above solution after fully dissolving and mixing. React at 60°C for 2 hours to obtain the first solution;

[0026]

[0027] Step 2, adding 2-acrylamide-2-methylpropanesulfonic acid and a crosslinking agent to the first solution to continue the reaction for 1 hour to obtain the final product;

[0028]

[0029] Step 3: Add antifreeze and corrosion inhibitor to the final product, stir thoroughly and evenly, and adjust the pH value to obtain the above-mentioned wetting agent.

Embodiment 1

[0032] Weigh 2g of sodium lignosulfonate and 4ml of vinyl acetate and dissolve them in 200ml of water. After fully dissolving and stirring for 30 minutes, add 0.5g of ammonium persulfate to the solution, and react at a constant temperature of 60°C for 2 hours. Add 2 g of 2-acrylamide-2-methylpropanesulfonic acid and 0.5 g of N-N methylenebisacrylamide to the solution, keep stirring at 60° C. for 2 hours. After the reaction is completed, add 0.3g calcium chloride and 0.2ml phosphorus carboxylic acid to the solution to adjust the pH, take 2ml and 0.2g dodecyl dimethyl betaine and add it into 1L water and mix evenly, and test the relevant properties.

Embodiment 2

[0034] Weigh 2g of sodium lignosulfonate and 4ml of vinyl acetate and dissolve them in 200ml of water. After fully dissolving and stirring for 30 minutes, add 0.5g of ammonium persulfate to the solution, and react at a constant temperature of 60°C for 2 hours. Add 4 g of 2-acrylamide-2-methylpropanesulfonic acid and 0.5 g of N-N methylenebisacrylamide to the solution, keep stirring at 60° C. for 2 hours. After the reaction is completed, add 0.3g calcium chloride and 0.2ml phosphorus carboxylic acid to the solution to adjust the pH, take 2ml and 0.2g dodecyl dimethyl betaine and add it into 1L water and mix evenly, and test the relevant properties.

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