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Fireproof material of using inorganic salts-free radical quenching agent to inhibit spontaneous combustion of coal and preparation method thereof

A fireproof material and free radical technology, applied in fireproof equipment and other directions, can solve the problems of increasing the difficulty of using chemical inhibitors, increasing the cost of use, and short resistance life, and achieving long-lasting and high-efficiency coal spontaneous combustion fire prevention, increased bonding, and resistance long life effect

Active Publication Date: 2019-08-16
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the poor contact between the existing coal mine fireproof materials and the coal body, short inhibitory life, low inhibitory efficiency, unable to achieve long-term continuous inhibition, requiring multiple refills, increasing the use cost, and the inhibitory agent does not affect the coal type. It has selectivity, has different inhibitory effects on different coal types, and increases the difficulty of using inhibitors. It provides a fireproof material and its preparation method for dual inhibition of coal spontaneous combustion by inorganic salt-free radical quenching agent

Method used

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  • Fireproof material of using inorganic salts-free radical quenching agent to inhibit spontaneous combustion of coal and preparation method thereof
  • Fireproof material of using inorganic salts-free radical quenching agent to inhibit spontaneous combustion of coal and preparation method thereof
  • Fireproof material of using inorganic salts-free radical quenching agent to inhibit spontaneous combustion of coal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take 50 parts of magnesium chloride and 70 parts of calcium chloride and slowly add them to 900 parts of distilled water, and stir continuously until they are completely dissolved. Heat will be generated during the stirring process, and the heat will be dissipated by standing still.

[0028] (2) Dissolve 30 parts of N,N-dibenzylhydroxylamine (DBHA) and 50 parts of 2,6-di-tert-butyl-4-methylphenol (BHT) powder in 50ml of ethanol with a concentration of 60-70% solution, and stir well.

[0029] (3) Mix the solutions prepared in step 1 and step 2, and slowly add 10 parts of NaHCO to the mixture 3 , Stir well to keep the pH between 6-7.

[0030] (4) Add 30 parts of sodium citrate activity enhancer and 10 parts of sodium lauryl sulfate surfactant to the prepared mixed solution, and stir thoroughly to obtain the inorganic salt-free radical quenching described in the present invention It is a fireproof material that double suppresses the spontaneous combustion of coal.

Embodiment 2

[0032] (1) Take 60 parts of magnesium chloride and 40 parts of calcium chloride and slowly add them to 950 parts of distilled water, and stir continuously until they are completely dissolved. Heat will be generated during the stirring process, and the heat will be dissipated by standing still.

[0033] (2) Dissolve 40 parts of N,N-dibenzylhydroxylamine (DBHA) and 30 parts of 2,6-di-tert-butyl-4-methylphenol (BHT) powder in 50ml of ethanol with a concentration of 60-70% solution, and stir well.

[0034] (3) Mix the solutions prepared in step 1 and step 2, and slowly add 10 parts of NaHCO to the mixture 3 , Stir well to keep the pH between 6-7.

[0035] (4) Add 30 parts of sodium citrate activity enhancer and 20 parts of sodium lauryl sulfate surfactant to the prepared mixed solution, and stir thoroughly to obtain the inorganic salt-free radical quenching described in the present invention It is a fireproof material that double suppresses the spontaneous combustion of coal.

Embodiment 3

[0037] (1) Take 50 parts of magnesium chloride and 50 parts of calcium chloride and slowly add them into 1000 parts of distilled water, and stir continuously until they are completely dissolved. Heat will be generated during the stirring process, and the heat will be dissipated by standing still.

[0038] (2) Dissolve 50 parts of N,N-dibenzylhydroxylamine (DBHA) and 20 parts of 2,6-di-tert-butyl-4-methylphenol (BHT) powder in 50ml of ethanol with a concentration of 60-70% solution, and stir well.

[0039] (3) Mix the solutions prepared in step 1 and step 2, and slowly add 8 parts of NaHCO to the mixture 3 , Stir well to keep the pH between 6-7.

[0040] (4) Add 20 parts of sodium citrate activity enhancer and 20 parts of sodium lauryl sulfate surfactant to the prepared mixed solution, and stir thoroughly to obtain the inorganic salt-free radical quenching described in the present invention It is a fireproof material that double suppresses the spontaneous combustion of coal. ...

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Abstract

The invention discloses a fireproof material of using inorganic salts-a free radical quenching agent to inhibit the spontaneous combustion of coal and a preparation method thereof, and belongs to thetechnical field of control of spontaneous combustion of coal. The problem that the effect of a conventional fireproof material for coal mines is not good is solved. The fireproof material is composedof inorganic salts, a carbon-oxygen free radical quenching agent, a surfactant, an active synergist, a pH adjuster, and water. Inorganic salts are dissolved into water to prepare an inorganic salt retardant solution; a carbon free radical capturing agent and an oxygen free radical capturing agent are dissolved into ethanol to prepare a free radical quenching agent solution; the inorganic salt retardant solution and the quenching agent solution are mixed, the pH is adjusted to 6-7; then an active enhancer and a surfactant into the mixed solution, and the mixed solution is fully stirred to prepare the fireproof material. The provided fireproof material can quench the fire during the whole process of spontaneous combustion of coal and has a continuous and high efficient inhibiting effect.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of coal spontaneous combustion, and in particular relates to a fireproof material capable of double inhibiting coal spontaneous combustion by an inorganic salt-radical quenching agent and a preparation method thereof. Background technique [0002] Mine fire is one of the major disasters in coal mines. 90% of mine fires in coal mines are caused by coal spontaneous combustion, threatening the lives of miners, bringing huge economic losses to coal mining enterprises, and seriously restricting the sustainable development of mines. Coal spontaneous combustion has become one of the problems that need to be solved urgently in coal mine safety production. Spraying inhibitors is currently the most commonly used method for coal mining enterprises to prevent coal spontaneous combustion. It mainly uses certain inorganic salts that can inhibit coal oxidation to be sprayed in the goaf or injected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/10A62D1/00
CPCA62D1/0042C09K21/10
Inventor 张玉龙王婕王俊峰周春山周斌
Owner TAIYUAN UNIV OF TECH
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