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Compound nitride-combined silicon carbide hanging plate for cement kiln preheaters, and firing method thereof

A technology of nitride and silicon carbide, which is applied in the field of composite nitride combined with silicon carbide hanging board and firing for cement kiln preheater, can solve the limitation of high temperature resistance, corrosion resistance and wear resistance, and the service life is only one year, which affects the production of enterprises Time and other issues, to achieve the effect of enhanced corrosion resistance, extended service life, and promising market prospects

Active Publication Date: 2009-12-16
洛阳鹏飞耐磨材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the preheater cyclones used in my country's cement industry use heat-resistant stainless steel pendants. The disadvantages are: first, the price of steel is expensive; second, the service life is short. The performance is limited by certain conditions, and its service life is short, and the service life is only about one year under normal conditions.
For this reason, it has caused a serious burden on the production of the enterprise, and the production time of the enterprise has been seriously affected due to the shutdown for maintenance and replacement of the inner cylinder.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The materials of the hanging board are: silicon carbide powder, silicon powder, silicon dioxide micropowder, aluminum oxide micropowder and polyvinyl alcohol solution. The ratio of parts by weight of each material is: 15% of silicon carbide with a particle size of 0mm-0.5mm, 10% of silicon carbide with a particle size of 0.5mm-1mm, 45% of silicon carbide with a particle size of 1mm-3mm, 15% of silicon powder, and Silica micropowder 5%, aluminum oxide micropowder 7%, polyvinyl alcohol 3%.

[0034] In the wet mud machine, first dry mix silicon carbide particles according to the above ratio, then add the corresponding proportion of polyvinyl alcohol, and then add the remaining various powders in the above ratio, mix evenly, and extrude to make a hanging slab , send the hanging slabs to the drying kiln for drying, the control temperature of the drying kiln is 100°C, the drying time is 24 hours, and the kiln is taken out, and the dried hanging slabs are sent to the sintering...

Embodiment 2

[0040] The materials of the hanging board are: silicon carbide powder, silicon powder, silicon dioxide micropowder, aluminum oxide micropowder and sulfurous acid. The weight ratio of each material is: 25% of silicon carbide with a particle size of 0mm-0.5mm, 15% of silicon carbide with a particle size of 0.5mm-1mm, 40% of silicon carbide with a particle size of 1mm-3mm, 10% of silicon powder, and Silica powder 4%, aluminum oxide powder 3%, sulfurous acid 3%.

[0041] In the wet mud machine, first dry mix silicon carbide particles according to the above proportion, then add sulfurous acid in the corresponding proportion, and then add various powder materials in the above proportion, after mixing evenly, extrude to form a hanging slab. The hanging slab is sent to the drying kiln for drying. The control temperature of the drying kiln is 100°C, and the drying time is 24 hours. After leaving the kiln, the dried hanging slab is sent to the sintering kiln. The sintering method is:

...

Embodiment 3

[0047] The materials of the hanging board are: silicon carbide powder, silicon powder, silicon dioxide micropowder, aluminum oxide micropowder and pulp waste liquid. The weight ratio of each material is: 17% of silicon carbide with a particle size of 0mm-0.5mm, 10% of silicon carbide with a particle size of 0.5mm-1mm, 40% of silicon carbide with a particle size of 1mm-3mm, 20% of silicon powder, and Silica powder 2%, aluminum oxide powder 7%, pulp waste liquid 4%.

[0048] In the wet mud machine, first dry mix silicon carbide particles according to the above proportion, then add the corresponding proportion of pulp waste liquid, and then add various powder materials in the above proportion, after mixing evenly, extrude to form a hanging slab. Send the hanging slabs to the drying kiln for drying. The control temperature of the drying kiln is 100°C, and the drying time is 24 hours. After leaving the kiln, the dried hanging slabs are sent to the sintering kiln. The sintering meth...

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Abstract

The invention provides a compound nitride-combined silicon carbide hanging plate for cement kiln preheaters, and a firing method thereof. The hanging plate consists of silicon carbide, silica powder, silica micropowder, aluminium sesquioxide micropowder and organic liquid binder. The hanging plate is made from compound nitride-combined silicon carbide, and the compound nitride-combined silicon carbide is silicon carbide material obtained by compounding and combining silicon nitride (Si3N4), silicon oxynitride (Si2N2O), and sialon (Si[6-z]AlzOzN[8-z], wherein z is more than 0, and less than or equal to 4.2). Because each component has high temperature resistance, high strength, super hardness, wear resistance, corrosion resistance and other performances, all performance indexes of the hanging plate are effectively improved. Moreover, due to simple manufacture, low price and considerable market prospects, the hanging plate of compound nitride-combined silicon carbide can replace alloy steel better, thereby greatly reducing production cost for enterprises.

Description

technical field [0001] The invention relates to a hanging board for a cement kiln preheater, in particular to a composite nitride-bonded silicon carbide hanging board for a cement kiln preheater and a firing method thereof. Background technique [0002] At present, most of the preheater cyclones used in my country's cement industry use heat-resistant stainless steel pendants. The disadvantages are: first, the price of steel is expensive; second, the service life is short. The performance is limited by certain conditions, and its service life is short, and the service life is only about one year under normal conditions. For this reason, the production of the enterprise has caused a serious burden, and the production time of the enterprise has been seriously affected because of the shutdown for maintenance and replacement of the inner cylinder. In order to save costs for enterprises, there is an urgent need for a hanging plate and a manufacturing method that can replace alloy ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/565C04B35/622F27D13/00
Inventor 贾剑光
Owner 洛阳鹏飞耐磨材料股份有限公司