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Corundum Brick: High-Grade Refractory Brick for Extreme High-Temperature Furnace Lining
Introduction to Corundum Brick
Corundum brick is a premium refractory product dominated by corundum crystalline phase, with Al₂O₃ content above 90%. It belongs to neutral high-alumina refractory material, manufactured by high-pressure forming and high-temperature sintering. Featuring ultra-high refractoriness, great mechanical strength and outstanding chemical inertness, corundum brick serves as the preferred lining material for harsh high-temperature working conditions where ordinary high alumina bricks cannot meet service requirements.
Core Physical & Chemical Properties
Corundum brick has a melting point of around 2050℃, and keeps stable structure under long-term high-temperature load.
- High refractoriness under load, stable above 1700℃ continuous working temperature
- Dense microstructure, low apparent porosity, effectively blocking penetration of slag and molten media
- Superior cold and hot compressive strength, strong abrasion resistance
- Good chemical stability, resists erosion from acid slag, neutral slag and molten glass
- Low thermal expansion rate, reliable thermal shock resistance against temperature cycling
Main Types of Corundum Bricks
Sintered Corundum Brick
Sintered corundum brick is the mainstream grade, sintered at ultra-high temperature. It balances performance and cost, widely adopted in metallurgy, glass and ceramic kilns. Common grades include Al₂O₃ 92%, 95% and 98%.
Fused Corundum Brick
Produced by electric melting and casting, with Al₂O₃ up to 99%. It has ultra-high density and best anti-corrosion performance, applied for the most severe corrosion zones in glass furnaces and gasifiers.
Composite Corundum Series
Corundum-mullite brick and corundum-spinel brick are composite grades. Extra mullite or spinel phase improves thermal shock resistance, suitable for furnaces with frequent temperature fluctuation.
Industrial Application Fields
Corundum bricks are widely used for the working lining of various high-temperature industrial kilns.
- Glass melting furnace: superstructure, breast wall, regenerator and flue channels
- Metallurgical industry: ladle, tundish, blast furnace, electric arc furnace
- Petrochemical industry: gasifier lining and high-temperature reactor
- Ceramic & cement industry: tunnel kiln, shuttle kiln and rotary kiln key zones
- Non-ferrous metal smelting furnace
Advantages of Our Corundum Bricks
We strictly control raw material selection and high-temperature sintering process for our corundum bricks. Full chemical composition and physical test reports (COA) can be provided for each batch.
- Stable chemical composition and consistent bulk density
- Customized sizes and special shapes available according to customer drawings
- Strict quality inspection before shipment, stable service life
- Professional refractory technical support for furnace lining design and installation guidance
FAQ
What is the difference between corundum brick and high alumina brick?
Corundum brick has Al₂O₃ over 90%, much higher refractoriness, hot strength and slag resistance than ordinary high alumina brick. It is designed for higher temperature and more corrosive environments.
Can you supply custom shaped corundum bricks?
Yes. We produce standard bricks and precast special-shaped corundum bricks based on clients’ drawings.
Can I get sample and COA document?
Samples are available upon request. Complete COA with chemical and physical indicators will be offered for formal orders.
Conclusion
Corundum brick remains one of the most trusted high-performance refractory materials for modern high-temperature industries. Whether you need standard sintered corundum brick or fused corundum brick for glass, metallurgy or chemical furnaces, we can deliver reliable products with competitive price. Contact our team to get your technical data sheet and quotation.
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