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Preparation method for composite inhibitor used for preventing and handling serf-combustion of coal

A coal spontaneous combustion and inhibitor technology, which is applied in dust prevention, mining equipment, earthwork drilling, etc., can solve the problems of catalyzing coal-oxygen recombination speed, affecting the inhibition effect, and moisture evaporation of inhibitors, so as to prevent coal spontaneous combustion , reducing the likelihood, reducing the effect of exposure

Inactive Publication Date: 2017-08-11
CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: traditional inorganic salt inhibitors are easily affected by temperature, and the increase in coal body temperature will easily evaporate the water absorbed by the inhibitor, which will affect the inhibitory effect, and the inhibitor will catalyze coal Oxygen recombination speed defect, providing a method for preventing coal spontaneous combustion with composite inhibitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Weigh 60g of sodium-based montmorillonite, add 500mL of deionized water, disperse with 500W ultrasonic for 30min, then add 12g of ferric chloride, stir at 300r / min for 15h, then filter, wash the filter residue with deionized water 3 times, and then Place the filter residue in a drying box, dry at 60°C for 20h, cool to room temperature, put it into a pulverizer, and smash through a 200-mesh sieve to obtain iron-based montmorillonite; weigh 50g of iron-based montmorillonite and add 500mL deionized In the water, under a constant temperature water bath of 70℃, stir at 300r / min for 30min, then add 20g cetyltrimethylammonium bromide, continue to stir for 1h, then put it into the centrifuge, centrifuge at 5000r / min for 10min, get After the precipitate is washed with deionized water for 3 times, the precipitate is placed in a drying box, dried to constant weight at 105°C, cooled to room temperature, and then placed in a pulverizer for pulverization and passed through a 200-mesh s...

example 2

[0024] Weigh 80g sodium-based montmorillonite, add it to 600mL deionized water, disperse with 500W ultrasonic for 40min, add 18g ferric chloride, stir for 20h at 400r / min, then filter, wash the filter residue with deionized water 5 times, and then Place the filter residue in a drying box, dry at 70°C for 24 hours, cool to room temperature, and put it into a pulverizer to pulverize, pass a 200-mesh sieve to obtain iron-based montmorillonite; weigh 75g iron-based montmorillonite and add 600mL deionized In water, under a constant temperature water bath of 80°C, stir at 400r / min for 40min, then add 30g cetyltrimethylammonium bromide, continue to stir for 2h, then put it into a centrifuge, centrifuge at 6000r / min for 15min, get After the precipitate is washed with deionized water for 5 times, the precipitate is placed in a drying box, dried to constant weight at 110°C, cooled to room temperature, and then placed in a pulverizer for pulverization, and passed through a 200-mesh sieve t...

example 3

[0027] Weigh 70g sodium-based montmorillonite, add 550mL deionized water, disperse with 500W ultrasonic for 35min, add 15g ferric chloride, stir for 18h at 350r / min, then filter, wash the filter residue with deionized water 4 times, and then Place the filter residue in a drying box, dry at 65°C for 22 hours, cool to room temperature, and put it into a pulverizer to crush, pass a 200-mesh sieve to obtain iron-based montmorillonite; weigh 63g of iron-based montmorillonite and add 550mL deionized In water, under a constant temperature water bath of 75℃, stir at 350r / min for 35min, then add 25g cetyltrimethylammonium bromide, continue to stir for 1.5h, then put it into a centrifuge, centrifuge at 5500r / min for 12min, Obtain the precipitate. After washing the precipitate with deionized water 4 times, place the precipitate in a drying box, dry to constant weight at 108°C, cool to room temperature, put it into a pulverizer, and smash it through a 200-mesh sieve to obtain modified iron ...

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Abstract

The invention specifically relates to a preparation method for a composite inhibitor used for preventing and handling serf-combustion of coal, belonging the technical field of prevention of serf-combustion of coal. The preparation method comprises the following steps: with sodium-based montmorillonite as a raw material, carrying out ultrasonic dispersion and then subjecting the dispersed sodium-based montmorillonite to ion exchange with ferric trichloride; then with cetyl trimethyl ammonium bromide as an intercalator, preparing high-dispersibility modified iron-based montmorillonite; subjecting reduced iron powder, graphite and copper powder to ball milling and alloyage and carrying out physical combination under the action of pressure to form a short-circuit corrosion microbattery together so as to improve an oxygen uptake rate; then loading modified iron-based montmorillonite with magnesium chloride; and then carrying out compounding with carboxymethyl cellulose, ethyl acetate, gelatin and the like so as to obtain the composite inhibitor used for preventing and handling serf-combustion of coal. The composite inhibitor used for preventing and handling serf-combustion of coal can deeply enter the pores of coal, consumes oxygen in a surrounding environment, reduces the temperature of coal due to its water absorption performance, decreases contact between coal and oxygen and lowers the possibility of serf-combustion of coal.

Description

Technical field [0001] The invention belongs to the technical field of preventing coal spontaneous combustion, and specifically relates to a preparation method of a composite inhibitor for preventing coal spontaneous combustion. Background technique [0002] Coal spontaneous combustion fires have always threatened the safety of coal production and storage, affected mining efficiency, and even caused gas explosions or underground fires, which seriously threatened the personal safety of mines and miners. The main reason for the spontaneous combustion of coal seams is that there are cracks in the coal seam. The oxygen in the air enters the coal seam through the cracks and reacts with the coal to release heat. The heat accumulates to the ignition point and spontaneous combustion occurs. Therefore, preventing coal-oxygen contact can make the coal-oxygen composite heat release less than the heat dissipation of the coal rock mass to the surrounding rock mass, so that the temperature of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/14E21F5/06
CPCC09K21/14E21F5/06
Inventor 张军杨阳李雪晴
Owner CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
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