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In-situ generated flaky sialon-enhanced alumina-carbon refractory material and preparation method thereof

An aluminum-carbon refractory material, in-situ generation technology, applied in the field of sheet-like sialon-reinforced aluminum-carbon refractory materials, to achieve the effects of excellent fracture toughness, high normal temperature mechanical properties, and long service life

Inactive Publication Date: 2015-09-23
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above research is to improve the Al 2 o 3 - Properties of C-based refractories, but not involving in situ generated 2D sheet-like β-Sialon

Method used

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  • In-situ generated flaky sialon-enhanced alumina-carbon refractory material and preparation method thereof
  • In-situ generated flaky sialon-enhanced alumina-carbon refractory material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] An in-situ flaky sialon-reinforced aluminum-carbon refractory material and a preparation method thereof. First use 50~55wt% of corundum particles, 25~30wt% of corundum fine powder, 1~8wt% of activated alumina micropowder, 1~5wt% of carbon and 1~5wt% of antioxidant as raw materials, and add the 1~6wt% binder of raw materials, mixed and milled, trapped, molded, and dried; then kept in a reducing atmosphere at 1300~1450°C for 1~4 hours to obtain in-situ flaky sialon-reinforced aluminum-carbon refractories .

[0035] In this embodiment: the corundum particles are fused white corundum particles; the corundum fine powder is fused white corundum fine powder; the carbon is carbon black; the antioxidant is Si powder; Thermosetting liquid phenolic resin; the reducing atmosphere is a carbon-buried atmosphere.

Embodiment 2

[0037] An in-situ flaky sialon-reinforced aluminum-carbon refractory material and a preparation method thereof. Except following technical parameter, all the other are with embodiment 1.

[0038] In this embodiment: the corundum particles are alumina-based fused corundum particles; the corundum fine powder is alumina-based fused corundum fine powder; the carbon is graphite; the antioxidant is Al powder; The bonding agent is a thermoplastic phenolic resin; the reducing atmosphere is an atmosphere of buried graphite.

Embodiment 3

[0040] An in-situ flaky sialon-reinforced aluminum-carbon refractory material and a preparation method thereof. First use 50~55wt% of corundum particles, 25~30wt% of corundum fine powder, 1~8wt% of activated alumina micropowder, 1~5wt% of carbon and 1~5wt% of antioxidant as raw materials, and add the 1~6wt% binder of raw materials, mixed and milled, trapped, formed, and dried; then kept at 1450~1600°C for 3~6 hours in a nitrogen atmosphere to obtain in-situ flaky sialon-reinforced aluminum-carbon refractories .

[0041] In this embodiment: the corundum particles are a mixture of alumina-based fused corundum particles and fused white corundum particles; the corundum fine powder is a mixture of alumina-based fused corundum fine powder and fused white corundum fine powder; The carbon is a mixture of graphite and carbon black; the antioxidant is a mixture of Al powder and Si powder; the binding agent is a mixture of thermosetting liquid phenolic resin and thermoplastic phenolic r...

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Abstract

The invention specifically relates to an in-situ generated flaky sialon-enhanced alumina-carbon refractory material and a preparation method thereof. According to the technical scheme, the method comprises the following steps: mixing and grinding 50-70 percent by weight of alundum particles, 10-30 percent by weight of corundum fine powder, 1-8 percent by weight of active alumina micro powder, 1-20 percent by weight of carbon source and 1-5 percent by weight of antioxidant serving as raw materials, and a bonding agent added in an amount of 1-6 percent by weight based on the total weight of the raw materials, ageing the materials, forming and drying; preserving heat for 1-6 hours under the condition of reducing atmosphere or nitrogen atmosphere at the temperature of 1,300-1,600 DEG C to obtain the in-situ generated flaky sialon-enhanced alumina-carbon refractory material. The preparation cost is low. The prepared in-situ generated flaky sialon-enhanced alumina-carbon refractory material has the characteristics of high thermal vibration stability, superior fracture resistance, high normal-temperature mechanical property, low refractory material consumption and long service life.

Description

technical field [0001] The invention belongs to the technical field of sheet-like sialon reinforced aluminum-carbon refractories. Specifically, it relates to an in-situ-generated sheet-shaped sialon reinforced aluminum-carbon refractory material and a preparation method thereof. Background technique [0002] The metallurgical continuous casting process is a process in which liquid steel is directly cast into various billets. Among them, refractory materials play the roles of conveying molten steel, preventing molten steel from oxidation and turbulent flow, and preventing impurities from entering, and are key structural components of the continuous casting process. During this process, refractory materials need to withstand rapid temperature changes and impacts, and need to withstand the erosion of steel slag. where Al 2 o 3 -C quality refractory material contains graphite phase with high thermal conductivity, exhibits good properties such as slag erosion resistance and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李享成郭定桥陈平安朱伯铨
Owner WUHAN UNIV OF SCI & TECH
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