Composite gel inhibitor for preventing and controlling spontaneous combustion of coal in coal mine and preparation method thereof

A composite gel and inhibitor technology, applied in chemical instruments and methods, mining equipment, dust-proof and other directions, can solve the problem of destroying active structures and groups, weak adhesion of inorganic salt inhibitors, and reducing coal quality. and other problems, to achieve the effect of preventing further expansion, excellent inhibition effect, and reducing oxygen absorption capacity

Inactive Publication Date: 2010-05-26
府谷能源投资集团五一矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The adhesion of inorganic salt inhibitors on the solid coal surface is not strong, it is easy to lose, and the use efficiency is low. The silica gel inhibitors formed with water glass as the base material have a large amount of coagulant. When extinguishing a large-scale fire, the transportation of materials is extremely inconvenient, which hinders the fire-fighting process;
[0006] 2) Polyvinyl alcohol, sodium alginate, superabsorbent resins and polymer emulsion inhibitors can condense into a solid phase layer to cover the surface of the coal body, preventing and delaying the entry of oxygen into the coal body, and functioning as an oxygen barrier. However, the high polymer after film formation can also participate in the oxidation reaction at high temperature, and quickly loses the inhibition effect;
[0007] 3) The added strong oxidant destroys the active structure and groups in the coal body and reduces the quality of the coal. On the other hand, when the strong oxidants such as perchlorate, permanganate, and peroxide react with the coal body because Heat release, there is a safety hazard

Method used

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  • Composite gel inhibitor for preventing and controlling spontaneous combustion of coal in coal mine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 10 parts by weight of acrylic acid monomers are dispersed in 100 parts by weight of water added with 10 parts by weight of polyacrylamide, 0.01 parts by weight of potassium persulfate, and 0.01 parts by weight of carbon tetrachloride, N 2 protection, carry out graft polymerization at 30°C for 20h to prepare a graft copolymer solution containing -COOH functional groups, add water to adjust the solid content of the graft copolymer solution to 10wt%, and then add sodium water under stirring 120 parts by weight of glass, and continue to stir evenly to obtain a polymer-inorganic composite gel inhibitor for preventing and controlling spontaneous combustion of coal in coal mines.

Embodiment 2

[0029] 120 parts by weight of acrylic acid monomers are dispersed in 200 parts by weight of water added with 120 parts by weight of polyacrylamide, 6 parts by weight of potassium persulfate and 6 parts by weight of carbon tetrachloride, N 2 protection, carry out graft polymerization at 110°C for 3 hours to obtain a graft copolymer solution containing -COOH functional groups, distill the water to adjust the solid content of the graft copolymer solution to 65wt%, and then add 264 parts by weight of melamine formaldehyde resin and 88 parts by weight of sodium water glass are continuously stirred evenly to obtain a polymer-inorganic composite gel inhibitor for preventing and controlling spontaneous combustion of coal in coal mines.

Embodiment 3

[0031] 60 parts by weight of acrylic acid monomers are dispersed in 150 parts by weight of water added with 60 parts by weight of polyacrylamide, 2 parts by weight of potassium persulfate, and 150 parts by weight of carbon tetrachloride, N 2 protection, carry out graft polymerization at 80°C for 8h, and obtain a graft copolymer solution containing -COOH functional groups, whose solid content is 44wt%, and then add 128 parts by weight of melamine formaldehyde resin and 160 parts by weight under stirring part of sodium silicate, and continue to stir evenly to obtain a polymer-inorganic composite gel inhibitor for preventing spontaneous combustion of coal in coal mines.

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Abstract

The invention relates to a composite gel inhibitor for preventing and controlling spontaneous combustion of coal in a coal mine and a preparation method thereof. The composite gel inhibitor provided by the invention comprises the following components in percentage by weight: 10 to 65.0 percent of graft copolymer, 0 to 4.00 percent of flame retardant, 20 to 60.0 percent of water glass, and the balance of water. The graft copolymer containing a -COOH functional group is obtained by adopting a water soluble polymer and unsaturated carboxylic acid monomers to perform graft copolymerization, and the composite gel inhibitor for preventing and controlling the spontaneous combustion of the coal in the coal mine is obtained by adding the flame retardant and the water glass into the graft copolymer. The flame retardant provided by the invention has the advantages of excellent retarding effect, environmental friendliness and the like.

Description

technical field [0001] The invention relates to a chemical inhibitor for preventing spontaneous combustion of coal in coal mines and a preparation method thereof, in particular to a polymer-inorganic composite inhibitor for preventing spontaneous combustion of coal in coal mines and a preparation method thereof. Background technique [0002] Coal spontaneous combustion, also known as coal spontaneous combustion, refers to the combustion phenomenon that occurs due to the temperature of coal rising due to the heat accumulation of coal itself in the absence of external heat sources. Spontaneous combustion of coal not only burns precious resources, but also produces a large amount of CO, CO 2 and SO 2 Toxic and harmful gases, pollute the environment, endanger people's health and life, and can also induce gas and coal dust explosion accidents, causing major economic losses. [0003] To prevent coal spontaneous combustion, in addition to reasonable and effective mining technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/06C09K3/00
Inventor 闫乃清秦振平郭红霞王忠元崔新宇杨永升张良汉高培清
Owner 府谷能源投资集团五一矿业有限公司
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