Method for preparing fireproof and explosion suppression pulverized fuel ash carbon dioxide material

A technology of carbon dioxide and fly ash, which is applied in fire prevention, dust prevention, mining equipment, etc., can solve the problem of single preventive effect of fly ash grouting, and achieve suppression of coal spontaneous combustion, inerting gobs, reduction of oxygen concentration and The effect of gas concentration

CN101787289AInactive Publication Date: 2010-07-28CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-07-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing fireproof and explosion suppression pulverized fuel ash carbon dioxide material, which comprises the steps of: mixing 70-80% of water and 20-30% of pulverized fuel to prepare pulverized fuel ash slurry liquid according to the mass percent; mixing 94-98% of water and 2-6% of industrial sodium hydrogen carbonate to prepare industrial sodium hydrogen carbonate solution according to the mass percent; mixing 77-92% of water, 5-15% of industrial aluminum sulfate and 3-8% of polyvinyl alcohol to prepare mixed solution of the industrial aluminum sulfate and the polyvinyl alcohol according to the mass percent; and mixing the prepared pulverized fuel ash slurry liquid, the industrial sodium hydrogen carbonate solution and the mixed solution of the industrial aluminum sulfate and the polyvinyl alcohol according to the proportion of 1: 1: 1, mutually reacting to generate a great deal of carbon dioxide, and forming a great deal of foam. The foam pulverized fuel ash has good effect of preventing and extinguishing fire, releases carbon dioxide on gas phase, reduces the oxygen concentration and gas density in a mined out space, leads the mined out space for inerting, and inhibits spontaneous combustion of coal and gas explosion; the pulverized fuel ash on solid phase covers the coal body, blocks an air leakage channel and achieves the aim of preventing the spontaneous combustion of coal; and water on liquid phase can reduce the temperature of the coal body, thus reducing the ignition rate of the spontaneous combustion of coal.
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Description

technical field

[0001] The invention relates to a preparation method of a fire-proof and explosion-suppression material, in particular to a preparation method of a fire-proof and explosion-suppression fly ash carbon dioxide material suitable for coal spontaneous combustion and fire-induced gas explosion in goafs. Background technique

[0002] Coal spontaneous combustion is one of the main natural disasters in mines in my country. In my country's key state-owned coal mines, fires caused by coal spontaneous combustion account for about 90% of the total number of mine fires. There are still large-scale coalfield fires in Xinjiang, Ningxia, Inner Mongolia and other provinces in my country, and the amount of coal burned is 10 to 13.6 million tons per year. , the economic loss exceeds 20 billion yuan, and coal spontaneous combustion also produces a large amount of SO 2 , CO, CO 2 gas, seriously polluting the environment and causing casualties. In order to prevent spontaneous com...

Examples

Embodiment 1

[0012] Embodiment one, at first prepare respectively fly ash slurry, industrial sodium bicarbonate solution, industrial aluminum sulfate and polyvinyl alcohol mixed solution according to mass percentage, then three kinds of different mass percentages of slurry or solution are mixed according to the ratio of 1:1:1 By mixing the mass percentages, the fire-proof and explosion-suppressing fly ash carbon dioxide material that can be directly used is obtained. Specific steps are as follows:

[0013] 1. At room temperature (about 25°C), use the local fire prevention and extinguishing grouting pool 6 of the coal mine, add 70% of water and 30% of fly ash, and fully stir according to the mass percentage to prepare a fly ash slurry;

[0014] 2. Inject 94% of water and 6% of industrial sodium bicarbonate into the industrial sodium bicarbonate solution box 1, fully stir to dissolve it according to the mass percentage, and prepare industrial sodium bicarbonate solution;

[0015] 3. Inject ...

Embodiment 2

[0020] In the mass percentage of fly ash slurry: 75% of water, 25% of fly ash; in the mass percentage of industrial sodium bicarbonate solution: 96% of water, 4% of industrial sodium bicarbonate; in the mass percentage of industrial aluminum sulfate and polyvinyl alcohol mixed solution Middle: 85% water, 10% industrial aluminum sulfate, 5% polyvinyl alcohol. Others are the same as in Embodiment 1, omitted.

Embodiment 3

[0022] In the mass percentage of fly ash slurry: 80% of water, 20% of fly ash; in the mass percentage of industrial sodium bicarbonate solution: 98% of water, 2% of industrial sodium bicarbonate solution; in the mass percentage of industrial aluminum sulfate and polyvinyl alcohol mixed solution : Water 92%, industrial aluminum sulfate 5%, polyvinyl alcohol 3%. Others are the same as in Embodiment 1, omitted.