Method for increasing smelting point of coal ash

A technology of ash melting point and melting point, which is applied in the field of improving the melting point of coal ash, and can solve the problems of low melting point of coal ash, limited application range, and high cost

Inactive Publication Date: 2008-05-28
张宏光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the ash melting point of some coals to a certain extent, but because the serious influence of the sulfur content in coal on the ash melting point is not considered, the scope of application is very limited.
[0004] Those skilled in the art know that sulfur plays a role in lowering the melting point of ash in coal ash, and the sulfur content must be controlled in the boil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: Take 85% of low-melting point coal, add 6% of additive quartz sand, control the sulfur content S≤1%, mix evenly, the ash melting point is greater than 1250°C after analysis.

Embodiment 2

[0013] Embodiment 2: Take 90% of low-melting point coal, add 9% of the additive quartz sand, control the sulfur content S≤0.8%, mix evenly, and the ash melting point is greater than 1300° C. through analysis.

Embodiment 3

[0014] Embodiment 3: Take 94% of low-melting point coal, add 13% of additive quartz sand, control the sulfur content S≤0.8%, mix evenly, and the ash melting point is greater than 1340° C. after analysis.

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PUM

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Abstract

Provided is a process for increasing the fusing point of coal ash, which is characterized in that low-melting-point coal acts as raw material and is blended with addition agent to realize the process. The content of the low-melting-point coal as the raw material is 85 percent to 95 percent, the content of sulfur S is controlled no more than 1 percent, and the content of the blended addition agent is 6 percent to 13 percent. The addition agent can be ganister sand, porcelain clay or kaolin. The process of increasing the fusing point of the coal ash which is introduced by the invention not only is simple and practical, but also can enable the fusing point of coal ash to be increased to proper value through regulating the content of the blended addition agent, which meets the application of fire coal in industry or in daily life.

Description

[technical field] [0001] The invention relates to a method for increasing the melting point of coal ash, which belongs to the technical field of coal combustion improvement. [Background technique] [0002] As we all know, coal ash is an extremely complex inorganic mixture, and the main component of coal ash is Al 2 o 3 , SiO 2 , CaO, MgO, Fe 2 o 3 、K 2 O, Na 2 O, TiO 2 , SO 3 wait. The ash melting point of coal is also different with different component contents. The coal ash melting point is an important indicator of the boiler fuel coal, especially the power plant boiler has very strict requirements on the ash melting point of the fuel coal. This is because coal with a low ash melting point burns in the furnace to produce molten ash that adheres to the furnace wall, which not only affects the thermal efficiency of the boiler, but more seriously causes potential safety hazards. Once an accident occurs, it will cause casualties. Therefore, coal ash melting point i...

Claims

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Application Information

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IPC IPC(8): C10L5/04
Inventor 张宏光
Owner 张宏光
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