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Fly ash-based high-sulfur-fixation coal binder as well as preparation method and application thereof

The technology of fly ash and binder is applied in the field of high-sulfur briquette binder and its preparation, which can solve the problem of insufficient sulfur-fixing performance, and achieve the effects of increasing market value, reducing environmental pollution and high strength.

Inactive Publication Date: 2021-08-06
陕西榆能集团能源化工研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aforementioned binders all have the problem of insufficient sulfur fixation performance.

Method used

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  • Fly ash-based high-sulfur-fixation coal binder as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0021] Such as figure 1 Shown, the present invention provides a kind of preparation method based on fly ash-based high-sulfur briquette binder, concrete steps are as follows:

[0022] First, take 100g of fly ash, add 40-80ml of water, then add 100-400g of sodium humate, asphalt, polyvinyl alcohol, starch, wood chips, etc. as an organic binder, and the auxiliary material is 5-25g of calcium oxide , fully mixed and stirred to obtain a milky fly ash-based high-sulfur briquette binder.

[0023] When the fly ash briquette binder obtained in the present invention is used to prepare briquettes, the binder and pulverized coal are fully mixed in a mass ratio of 1: (2-10) to form a viscous paste, which is passed through the briquette The mold is mechanically pressed and formed, usually at a pressure of 5-15T, and pressed for 5-15 minutes. Then dry it in an oven at 30-100°C for 5-30 hours, and then the molded coal with good mechanical strength and sulfur-fixing performance can be produ...

Embodiment 1

[0025] Add 100g of fly ash to 40ml of water, then add 400g of sodium humate and 10g of calcium oxide, fully stir and mix to form a milky substance, that is, a high-sulfur briquette binder based on fly ash. Mix the prepared binder with 1200g of coal powder, that is, the ratio of binder to coal powder is 1:2.2 to form a viscous paste. Put the pasty material into the briquette mold, press it under 5T pressure for 5 minutes, shape it, take it out and bake it in an oven at 50 degrees for 10 hours, and then you can get a briquette with good mechanical strength and sulfur-fixing performance.

[0026] According to MT / T 748 Determination of cold compressive strength of industrial briquettes, GB / T31861-2015 clean fuel briquettes for industrial kilns; GB / T 214 Determination of total sulfur in coal for wet pressure, dry pressure Strength and sulfur-fixing efficiency; actual tests show that the wet compressive strength of briquettes is 680N, the dry compressive strength reaches 400N, and t...

Embodiment 2

[0028] Add 100g of fly ash to 80ml of water, then add 100g of polyvinyl alcohol and 5g of calcium oxide, stir and mix thoroughly to form a milky substance, that is, a high-solid-sulfur briquette binder based on fly ash. Mix the binder with 1000g of coal powder, that is, the ratio of binder to coal powder is 1:4 to form a viscous paste. Put the pasty material into the briquette mold, press it under 10T pressure for 15 minutes, shape it, take it out and bake it in an oven at 40°C for 24 hours, and then you can get a briquette with good mechanical strength and certain sulfur-fixing performance. Actual tests show that the wet compressive strength of coal briquettes is 810N, the dry compressive strength reaches 500N, and the sulfur fixation efficiency can reach 55%.

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Abstract

The invention discloses a fly ash-based high-sulfur-fixation coal binder and a preparation method and application thereof, the fly ash-based high-sulfur-fixation coal binder is prepared by mixing a binder, an auxiliary material and fly ash according to a certain ratio, the binder plays a role in binding coal powder, and effective components in the auxiliary material and the coal ash play a role in sulfur fixation, the binder and pulverized coal are subjected to extrusion forming and drying to prepare the high-sulfur-fixation coal briquette, the binder has very high pulverized coal bonding capacity, and meanwhile, the prepared coal briquette also has relatively good mechanical strength. The method has the characteristics of wide raw material source and simple process, finds a convenient way for comprehensive utilization of the fly ash, reduces the cost of treating the fly ash as a solid waste traditionally, improves the market value of the fly ash, and has good application value.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, in particular to a fly ash-based high-sulfur briquette binder and its preparation method and application. Background technique [0002] Fly ash, also known as fly ash, is not only a solid waste produced by coal-fired boilers in thermal power plants, but also a potentially valuable artificial volcanic ash resource. Fly ash is usually gray-white or gray-black, and the color will deepen with the increase of incompletely burned carbon particles in fly ash. The chemical composition of fly ash is mainly affected by factors such as coal source, combustion method and collection method. The chemical composition of fly ash is mainly SiO 2 , Al 2 o 3 , Fe 2 o 3 , CaO, MgO, etc. Comprehensive domestic and foreign research on fly ash utilization technology, the main directions are concentrated in building materials, agriculture, environmental protection and refined utilizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/10
CPCC10L5/105
Inventor 黄晔高生辉高峰李立郝巧娥王云海赵世峰赵毅
Owner 陕西榆能集团能源化工研究院有限公司
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