Novel dust-inhibiting and fire-retarding covering agent for coal, and preparation method thereof

A covering agent and flame retardant technology, which is applied in the field of new coal dust suppression and flame retardant covering agent and its preparation, can solve the problems of coal spontaneous combustion and dust raising at the same time, so as to avoid dust raising and spontaneous combustion, strong wind resistance, and prevent The effect of spontaneous combustion of coal

Inactive Publication Date: 2012-05-23
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The existing technology has the problem of being unable to simultaneously solve the problems of spontaneous combustion and dust in the process of coal transportation and stacking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 4g of polyvinyl alcohol and dissolve it in 30ml of distilled water, place it in a water bath at 70°C, heat and stir for more than 0.5 hours, when the solution becomes colorless and transparent, adjust the temperature of the water bath to 50°C, and then Slowly add 10ml of ethanol solution and 2ml of propylene glycol dropwise under stirring, continue to stir, and slowly add 1ml of penetrant solution dropwise under stirring, continue to slowly add 0.75g of ammonium dihydrogen phosphate and 0.25g of pentaerythritol under stirring, and stir for 0.5 hours , in a 100ml volumetric flask, the new coal dust suppression and flame retardant covering agent can be prepared.

Embodiment 2

[0030] Weigh 4.5g of polyvinyl alcohol and dissolve it in 35ml of distilled water, place it in a water bath with a temperature of 70°C, heat and stir for more than 0.5 hours, when the solution becomes colorless and transparent, adjust the temperature of the water bath to 50°C, and then Slowly add 11ml of ethanol solution and 2.5ml of propylene glycol dropwise under stirring, continue to stir, and slowly add 2ml of penetrant solution dropwise under stirring, continue to slowly add 1.5g of ammonium dihydrogen phosphate and 0.5g of pentaerythritol under stirring, and stir for 0.5 Hours later, set the volume in a 100ml volumetric flask to prepare a novel coal dust suppression and flame retardant covering agent.

Embodiment 3

[0032] Weigh 5g of polyvinyl alcohol and dissolve it in 40ml of distilled water, place it in a water bath at 70°C, heat and stir for more than 0.5 hours, when the solution becomes colorless and transparent, adjust the temperature of the water bath to 50°C, and then Slowly add 12ml of ethanol solution and 3ml of propylene glycol dropwise under stirring, continue to stir, and slowly add 3ml of penetrant solution dropwise under stirring, continue to slowly add 2.25g of ammonium dihydrogen phosphate and 0.75g of pentaerythritol under stirring, and stir for 0.5 hours , in a 100ml volumetric flask, the new coal dust suppression and flame retardant covering agent can be prepared.

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PUM

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Abstract

The invention discloses a novel dust-inhibiting and fire-retarding covering agent for coal, and a preparation method thereof. The dust-inhibiting and fire-retarding covering agent comprises components of, by mass: 4-5% of a film forming agent, 10-12% of a curing agent, 2-3% of a film forming auxiliary agent, 1-3% of a penetrant, 1-3% of a fire retardant, and 74-82% of water. The preparation method of the dust-inhibiting and fire-retarding covering agent comprises steps that: the film forming agent is added and dissolved in water under a certain temperature; the temperature is controlled; the solution is continuously stirred, and the curing agent, the film forming auxiliary agent, the penetrant, and the fire retardant are orderly added to the solution while stirring; the mixture is stirred, until a reaction is sufficiently carried out. The novel dust-inhibiting and fire-retarding covering agent is sprayed onto the surface of coal under a normal temperature, and other equipments and conditions are not required. Within a short time, a flexible and compact continuous high-molecular covering membrane is formed, such that phenomena of dust emission and spontaneous combustion during transportation and stacking processes can be avoided. Therefore, coal economic loss and environmental pollution can be effectively reduced; and great economic benefits and social benefits of environmental protection are provided.

Description

technical field [0001] The invention relates to a novel coal dust-suppressing and flame-retardant covering agent and a preparation method thereof. Background technique [0002] During the process of coal accumulation and transportation, due to oxidation, the ash content of coal will increase, the fixed carbon and calorific value will decrease, and the quality of coal will be reduced. Coal spontaneous combustion can also cause a large amount of coal to be burned in vain. For example, the bituminous coal burned by Shantou Power Plant is often stored in the coal yard for more than 3 months. Due to the long storage time, spontaneous combustion often occurs, and sometimes spontaneous combustion occurs in several places at the same time. Smoldering coal is sent to conveying and grinding equipment, causing combustion and explosion accidents. Spontaneous combustion of coal is not only a major hidden danger, but also reduces the economic value of coal. At the same time, spontaneous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/22C09K21/06C09K21/04C08L29/04
Inventor 杨静王琨高建广李改平
Owner SHANDONG UNIV OF SCI & TECH
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