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

A sliding brick and bauxite technology, applied in the field of refractory product manufacturing, can solve problems such as difficulty in realizing industrialized production, complex production process equipment, and reduction of carbon content in materials, and achieve low raw material cost, excellent oxidation resistance and thermal shock resistance Sex, low carbon content effect

Inactive Publication Date: 2005-10-26
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 bauxite-based Al by using a reducing atmosphere (buried carbon) firing process. 2 o 3 -β-Sialon sliding bricks, to overcome the disadvantages of complex production process equipment, high cost and difficulty in industrialized production in the existing technology, and greatly reduce the carbon content of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] raw material:

[0031] Sintered tabular corundum particles, fused white corundum powder, alumina-based β-Sialon powder (the content of β-Sialon is 92% by weight), activated alumina, graphite with a carbon content greater than 97%, and metallic aluminum powder are used as raw materials. Its particle size is shown in Table 1,

[0032] composition

Sintered plate

Corundum particles

Fused white corundum

pink

Alumina-based beta

-Sialon powder

graphite

Metal Aluminum Powder

granularity

mm

5-0.1

0.088-0.001

0.088-0.001

0.16-0.001

0.088-0.001

[0033] The weight percentages of various raw materials are: 60% of sintered plate-shaped corundum particles, 17% of fused white corundum powder, 10% of alumina-based β-Sialon powder, 8% of activated alumina, 2% of graphite, and metal aluminum powder 3%.

[0034] preparation:

[0035] Mix the raw materials evenly according to th...

Embodiment 2

[0038] Raw materials: select sintered corundum particles, fused white corundum powder, alumina-based β-Sialon particles (the content of β-Sialon is 88% by weight), alumina-based β-Sialon powder (the content of 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, and the particle size of the raw materials is shown in Table 2.

[0039] Group

become

Sintered steel

Jade grains

Fused white

Corundum powder

Alumina-based beta

-Sialon pieces

Grain

Alumina-based beta

-Sialon powder

carbon black

Metal Aluminum Powder

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

[0040] The weight percentages of various raw materials are: sintered corundum particles 53%, fused white corundum powder 16%, a...

Embodiment 3

[0044]Raw materials: alumina-based fused corundum particles, sintered tabular corundum powder, alumina-based β-Sialon powder (the content of β-Sialon is 75% by weight), activated alumina, graphite with a carbon content greater than 92%, and metallic silicon powder as raw material. The particle size of raw materials is shown in Table 3.

[0045] composition

Alumina-based fused steel

Jade grains

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

[0046] Various raw materials by weight percentage are: alumina-based fused corundum particles 65%, sintered platy corundum powder 15%, alumina-based β-Sialon powder 10%, activated alumina 5%, metal silicon powder 4%, graphite 1 %.

[0047] Preparation: Mix the raw materials evenly according to the above ratio, add 5.0% phenolic resin in the...

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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 technical field of refractory product manufacture, and in particular relates to a low-carbon aluminum alloy with corundum and alumina-based β-Sialon as main raw materials. 2 o 3 - Preparation method of alumina-based β-Sialon sliding 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 used i...

Claims

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Application Information

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IPC IPC(8): C04B35/10
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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