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Oxidation reduction double blocking-based coal spontaneous combustion intelligent compound retardant and preparation method thereof

A technology of coal spontaneous combustion and chemical inhibitor, applied in the directions of dust prevention, fire prevention, mining equipment, etc., can solve the problems of poor resistance effect of floating coal, ignoring the key role of carbon free radicals, weak deep penetration energy of floating coal, etc.

Active Publication Date: 2018-10-12
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned existing problems, the present invention only aims at the high oxidation free radicals in coal spontaneous combustion and ignores the key role of carbon free radicals in the coal spontaneous combustion process for the existing coal spontaneous combustion retardant, and the anti-oxidation property floating coal deep penetration energy In order to solve the problems of poor internal resistance of floating coal that is weak and easy to accumulate heat, a kind of coal spontaneous combustion intelligent composite inhibitor based on redox double blocking function and its preparation method are provided.

Method used

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  • Oxidation reduction double blocking-based coal spontaneous combustion intelligent compound retardant and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] This embodiment is based on the coal spontaneous combustion intelligent composite inhibitor with redox double blocking function. The specific preparation process is: add 10g of acrylic acid monomer into 200ml of water, stir and dissolve, and neutralize with 20% sodium hydroxide solution to titrate to a pH value of 7. After cooling, add the neutralization solution to the four-necked flask of the synthesis container; at the same time, add 10 g of acrylamide monomer, and the mass concentration will be 80 g / L -1 200ml of the guar gum aqueous solution was added in the four-necked flask and fully stirred, and 20mg of crosslinking agent pentaerythritol triacrylate and 100mg of initiator ammonium persulfate were added successively during the stirring process, and the four-necked flask under nitrogen protection was placed at a constant temperature of 75 In a water bath at ℃, react at a constant temperature for 2 hours, and keep stirring to obtain acrylic acid-acrylamide-guar gum ...

Embodiment 2

[0027]This example is based on a coal spontaneous combustion intelligent composite inhibitor with redox double blocking, wherein the specific preparation process of ferrocene-grafted acrylic acid-acrylamide-guar gum copolymer is the same as that of Example 1, omitting. Get 1g of the obtained ferrocene grafted acrylic acid-acrylamide-guar gum copolymer powder and dissolve it in water, add 2g N-phenyl-N'-cyclohexyl-p-phenylenediamine ketoneamine antioxidant and 0.15g fatty alcohol Polyoxyethylene ether penetrating agent, and fully stirred for 30 minutes, after mixing evenly, dried at 40°C for 5 hours, and ground to obtain coal spontaneous combustion intelligent composite inhibitor solid powder with a particle diameter of less than 0.1mm.

Embodiment 3

[0029] This example is based on the coal spontaneous combustion intelligent composite inhibitor with redox double blocking function, wherein the specific preparation process of ferrocene-grafted acrylic acid-acrylamide-guar gum copolymer is the same as that of Example 1, omitting. Get 1g of the obtained ferrocene grafted acrylic acid-acrylamide-guar gum copolymer powder and dissolve it in water, add 5g N-phenyl-N'-cyclohexyl-p-phenylenediamine ketoneamine antioxidant and 0.33g fatty alcohol Polyoxyethylene ether penetrating agent, and fully stirred for 30 minutes, after mixing evenly, dried at 40°C for 5 hours, and ground to obtain coal spontaneous combustion intelligent composite inhibitor solid powder with a particle diameter of less than 0.1mm.

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Abstract

The invention discloses an oxidation reduction double blocking-based coal spontaneous combustion intelligent compound retardant. The retardant is prepared by compounding high molecular copolymer, aldehyde-amine and a penetrating agent in an optimally screened specific proportion, wherein the high molecular copolymer is prepared by the steps of hydrophobically modifying acrylic acid-acrylamide-guargum copolymer which is obtained by a solution polymerization method to prepare ferrocene butyryl chloride grafting modified acrylic acid-acrylamide-guar gum copolymer. The coal spontaneous combustionintelligent compound retardant belongs to the technical field of coal mine fire prevention retarding materials, the high-molecular copolymer frame has high water absorption and strong adhesive property, has the oxidation reduction double intelligent adjusting characteristic of grafted functional group ferrocene, can be used for eliminating carbon radical and hydroxyl radical in the coal spontaneous combusting process based on the oxidation reduction characteristic; and the penetrating agent can penetrate into the inside of float coal, carbon radical which does not react at large structure canbe eliminated, and constant efficient prevention and control of a coal spontaneous combustion zone can be realized.

Description

technical field [0001] The invention belongs to the technical field of coal mine fire prevention and chemical resistance materials, and specifically refers to a coal spontaneous combustion intelligent composite chemical resistance agent based on redox double blocking function and a preparation method thereof. Background technique [0002] Coal spontaneous combustion is one of the important safety hazards in the safe mining of coal mines and the storage and transportation of coal resources. Coal spontaneous combustion can produce a large number of toxic and harmful products, and develop into coal combustion, and will cause gas explosion, causing heavy loss of life and property. Coal spontaneous combustion retardant is one of the main means of prevention and control of coal spontaneous combustion at present, including calcium chloride, magnesium chloride and other halogen salts, ammonium salts and gel physical retardants mainly based on physical inhibition, and coal Chemical ...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08L71/02C08F285/00C08F232/06C08F251/00C08F220/06C08F220/56C08F4/40E21F5/06
CPCC08F4/40C08F251/00C08F285/00C08L51/06C08L2201/06C08L2201/08E21F5/06C08F232/06C08F220/06C08F220/56C08L71/02
Inventor 辛海会马李洋戚绪尧王德明窦国兰
Owner CHINA UNIV OF MINING & TECH
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