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Method for fabricating low carbon Al2O3 slide brick based on bauxite beta-Sialon

A technology for skateboard bricks and bauxite, which is applied in the field of high-temperature functional material manufacturing, can solve the problems of difficulty in realizing industrialized production, complicated production process equipment, and reducing the carbon content of materials, and achieves low cost of raw materials, excellent oxidation resistance and thermal shock resistance. the effect of low carbon content

Inactive Publication Date: 2009-05-13
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to use China's natural high-alumina bauxite as a raw material to prepare bauxite-based β-Sialon, compound it with corundum materials, and prepare a low-carbon Al 2 o 3 ——Alumina-based β-Sialon sliding brick, to overcome the complex production process and equipment of the prior art, high cost, and difficulty in realizing industrialized production, and greatly reduce the carbon content of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] raw material:

[0031] Select plate-shaped corundum particles, fused white corundum powder, alumina-based β-Sialon powder (alumina-based β-Sialon is 92% by weight), activated alumina, graphite with a carbon content greater than 97%, metal aluminum powder and metal silicon Powder is raw material, and its particle size is shown in Table 1,

[0032] Table 1 Particle size composition of raw materials

[0033]

composition Plate just

Jade grains Fused white corundum

pink Alumina-based beta

-Sialon powder

graphite

Metal Aluminum Powder Granularity

mm 5—0.01 0.088—0.001 0.088—0.001 0.16—0.001 0.088—0.001

[0034] Various raw materials are as follows by weight percentage: 60% of tabular corundum particles, 17% of fused white corundum powder, 10% of alumina-based β-Sialon powder, 8% of activated alumina, 2% of graphite, and 3% of metal aluminum powder.

[0035] preparation:

[0036] Mix the raw materials evenly ac...

Embodiment 2

[0039] raw material:

[0040] Select sintered corundum particles, fused white corundum powder, alumina-based β-Sialon particles (alumina-based β-Sialon is 88% by weight), alumina-based β-Sialon powder (alumina-based β-Sialon is 90% by weight %), activated alumina, carbon black with a carbon content greater than 98%, metal aluminum powder and boron carbide as raw materials, the particle size of raw materials is shown in Table 2,

[0041] Table 2 Particle size composition of raw materials

[0042] Group

become Sintered just

Jade grains Fused white

Corundum powder Alumina-based beta

-Sialon pieces

grain

Alumina-based beta

-Sialon powder

carbon black

metal aluminum

pink

boron carbide mm

5—0.1 0.088—

0.001

2—0.1 0.074—

0.001 0.01—

0.001 0.088—

0.001 0.074—

0.001

[0043] Various raw materi...

Embodiment 3

[0048] raw material:

[0049] Select alumina-based fused corundum particles, plate-like corundum powder, alumina-based β-Sialon powder (alumina-based β-Sialon is 75% by weight), activated alumina, carbon black with a carbon content greater than 92%, and metallic silicon powder as the raw material, and the particle size of the raw material is shown in Table 3.

[0050] Table 3 Particle size composition of raw materials

[0051]

composition Alumina based electricity

Fused corundum

grain Sintered sheet steel

jade powder Alumina-based beta

-Sialon powder graphite

Metal silicon powder

mm

5—0.1 0.088—

0.001

0.088—0.001

0.16—0.001 0.044—

0.001

[0052] Various raw materials by weight percentage are: alumina-based fused corundum particles 65%, platy corundum powder 15%, alumina-based β-Sialon powder 10%, activated alumina 5%, metal silicon powder 4%, graph...

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PUM

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Abstract

The present invention provides a preparation method of low-carbon Al2O3-Alumine base beta-sialon slide board brick. Said method uses corundum, alumine base beta-Sialon, active aluminum oxide, graphite or carbon black and antioxidant as raw material, uses resin as binding agent and adopts the following steps: machine-pressing and forming, firing at 1300-1600 deg.C under the condition of reduction atmosphere, oil-soaking, dry distillation, drilling hole, hooping, grinding and coating surface so as to obtain the invented slide board brick. Said invention is applicable to produce special steel, in particular produce steel.

Description

[0001] Field: [0002] The invention belongs to the field of manufacturing high-temperature functional materials, and in particular relates to a low-carbon Al with corundum and alumina-based β-Sialon as main raw materials 2 o 3 -The preparation method of alumina base β-Sialon sliding plate brick. Background technique: [0003] The sliding nozzle is a key component to control the flow of molten steel, and its safety and long life play a key role in the normal operation of continuous casting production. The slide plate is the most important component of the sliding nozzle, and it is also the component that bears the greatest risk among the components of the sliding nozzle, so it must be foolproof. [0004] At present, the main materials of domestic slide plates are aluminum-carbon and aluminum-zirconium-carbon. Small and medium-sized ladles mainly use unfired or fired aluminum-carbon slides, and large-scale ladles mainly use aluminum-zirconium carbon slides. Carbon is widely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/599
Inventor 钟香崇石凯岳卫东吕培中叶方保罗焰卫忠贤
Owner ZHENGZHOU UNIV
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