Inerting oxygen-consumption stopping agent for preventing goaf from self-igniting and preparation method thereof

Abstract

The invention discloses an inerting oxygen-consumption stopping agent for preventing a goaf from self-igniting and a preparation method thereof and belongs to the field of self-ignition prevention andtreatment materials in the coal mine goaf. The stopping agent is composed of an iron-containing oxygen-consumption agent, carbonate and thickener, wherein the mass ratio of the iron-containing oxygen-consumption agent to carbonate to thickener is 2:(1-2):(1-4). The preparation method comprises the following steps that 1, according to a matching proportion, the iron-containing oxygen-consumption agent is weighed and activated by using a sulfuric acid solution, the sulfuric acid solution is filtered, and the activated iron-containing oxygen-consumption agent is obtained; 2, according to a matching proportion, carbonate and thickener are added to the activated iron-containing oxygen-consumption agent in sequence and evenly stirred, and the inerting oxygen-consumption stopping agent for preventing the goaf from self-igniting is obtained. The preparation method of the stopping agent is simple, has the quadruple advantages of oxygen consumption, oxygen isolation, goaf inerting and cooling,and can improve the oxygen-consumption performance of a common deoxidation-type stopping agent, release inerting gas CO2, effectively lower the threat of spontaneous ignition of residual coal in the goaf, and provide a guarantee for safe production.

Description

Technical field:

[0001] The invention belongs to the field of spontaneous combustion prevention materials for goafs, and in particular relates to an inerting oxygen-consuming inhibitor for preventing spontaneous combustion of goafs and a preparation method thereof. Background technique:

[0002] Coal spontaneous combustion is one of the main disasters that threaten the safe production of coal mines. The resulting mine fires and fire accidents have caused huge casualties and property losses. At present, spraying inhibitors in gobs to prevent coal spontaneous combustion is a commonly used fire prevention technology in coal mines. Inhibitors can play the role of oxygen insulation and cooling, and inerting the active groups in coal, but the oxygen concentration around the coal remains There remains a threat to coal spontaneous combustion.

[0003] In view of the above reasons, a new type of inhibitor is needed, which can not only have the effect of traditional inhibitors, but a...

Examples

Embodiment 1

[0044] An inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion, which is composed of reducing iron powder, sodium carbonate and fumed white carbon black, wherein, in terms of mass ratio, reducing iron powder: sodium carbonate: gas-phase white carbon Black=2:1:4.

[0045] The preparation method of the inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion comprises the following steps:

[0046] Step 1, activation of iron-containing oxygen-depleting agents:

[0047] According to the proportion, the reduced iron powder is weighed, and after activating the reduced iron powder with a sulfuric acid solution with a concentration of 5% for 1 min, the sulfuric acid solution is filtered to obtain the activated reduced iron powder;

[0048] Step 2, inhibitor preparation:

[0049] Add sodium carbonate and fumed white carbon black successively to the activated reducing iron powder according to the proportioning ratio, and stir evenly to o...

Embodiment 2

[0051] An inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion, which is composed of reducing iron powder, sodium carbonate and fumed white carbon black, wherein, in terms of mass ratio, reducing iron powder: sodium carbonate: gas-phase white carbon Black=2:1:4.

[0052] The preparation method of the inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion comprises the following steps:

[0053] Step 1, activation of iron-containing oxygen-depleting agents:

[0054] According to the proportion, the reduced iron powder is weighed, and after activating the reduced iron powder with a sulfuric acid solution with a concentration of 5% for 1 min, the sulfuric acid solution is filtered to obtain the activated reduced iron powder;

[0055] Step 2, inhibitor preparation:

[0056] Add sodium carbonate and fumed white carbon black successively to the activated reducing iron powder according to the proportioning ratio, and stir evenly to o...

Embodiment 3

[0058]An inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion, which is composed of reducing iron powder, magnesium carbonate and fumed white carbon black, wherein, by mass ratio, reducing iron powder: magnesium carbonate: fumed white carbon Black=2:2:1.

[0059] The preparation method of the inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion comprises the following steps:

[0060] Step 1, activation of iron-containing oxygen-depleting agents:

[0061] According to the proportion, the reduced iron powder was weighed, and after the reduced iron powder was activated with a sulfuric acid solution with a concentration of 4% for 2 minutes, the sulfuric acid solution was filtered to obtain the activated reduced iron powder;

[0062] Step 2, inhibitor preparation:

[0063] According to the proportion, magnesium carbonate and fumed white carbon black are successively added to the activated reducing iron powder, and the mixture is...

Technical field:

[0001] The invention belongs to the field of spontaneous combustion prevention materials for goafs, and in particular relates to an inerting oxygen-consuming inhibitor for preventing spontaneous combustion of goafs and a preparation method thereof. Background technique:

[0002] Coal spontaneous combustion is one of the main disasters that threaten the safe production of coal mines. The resulting mine fires and fire accidents have caused huge casualties and property losses. At present, spraying inhibitors in gobs to prevent coal spontaneous combustion is a commonly used fire prevention technology in coal mines. Inhibitors can play the role of oxygen insulation and cooling, and inerting the active groups in coal, but the oxygen concentration around the coal remains There remains a threat to coal spontaneous combustion.

[0003] In view of the above reasons, a new type of inhibitor is needed, which can not only have the effect of traditional inhibitors, but a...

Examples

Embodiment 1

[0044] An inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion, which is composed of reducing iron powder, sodium carbonate and fumed white carbon black, wherein, in terms of mass ratio, reducing iron powder: sodium carbonate: gas-phase white carbon Black=2:1:4.

[0045] The preparation method of the inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion comprises the following steps:

[0046] Step 1, activation of iron-containing oxygen-depleting agents:

[0047] According to the proportion, the reduced iron powder is weighed, and after activating the reduced iron powder with a sulfuric acid solution with a concentration of 5% for 1 min, the sulfuric acid solution is filtered to obtain the activated reduced iron powder;

[0048] Step 2, inhibitor preparation:

[0049] Add sodium carbonate and fumed white carbon black successively to the activated reducing iron powder according to the proportioning ratio, and stir evenly to o...

Embodiment 2

[0051] An inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion, which is composed of reducing iron powder, sodium carbonate and fumed white carbon black, wherein, in terms of mass ratio, reducing iron powder: sodium carbonate: gas-phase white carbon Black=2:1:4.

[0052] The preparation method of the inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion comprises the following steps:

[0053] Step 1, activation of iron-containing oxygen-depleting agents:

[0054] According to the proportion, the reduced iron powder is weighed, and after activating the reduced iron powder with a sulfuric acid solution with a concentration of 5% for 1 min, the sulfuric acid solution is filtered to obtain the activated reduced iron powder;

[0055] Step 2, inhibitor preparation:

[0056] Add sodium carbonate and fumed white carbon black successively to the activated reducing iron powder according to the proportioning ratio, and stir evenly to o...

Embodiment 3

[0058]An inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion, which is composed of reducing iron powder, magnesium carbonate and fumed white carbon black, wherein, by mass ratio, reducing iron powder: magnesium carbonate: fumed white carbon Black=2:2:1.

[0059] The preparation method of the inerting oxygen-consuming inhibitor for preventing goaf spontaneous combustion comprises the following steps:

[0060] Step 1, activation of iron-containing oxygen-depleting agents:

[0061] According to the proportion, the reduced iron powder was weighed, and after the reduced iron powder was activated with a sulfuric acid solution with a concentration of 4% for 2 minutes, the sulfuric acid solution was filtered to obtain the activated reduced iron powder;

[0062] Step 2, inhibitor preparation:

[0063] According to the proportion, magnesium carbonate and fumed white carbon black are successively added to the activated reducing iron powder, and the mixture is...

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