Corundum Brick | Solve High-Temperature Wear

End-to-End High-Temperature Solutions with REBO Corundum Brick

Industry Application Cases

REBO corundum bricks have been deployed across steel, glass, and petrochemical industries from electric arc furnaces and ladle linings to regenerator checker chambers and ethylene cracking furnaces. In steel alone, our solutions have extended campaign life by up to 40% over standard refractory materials. These are long-running, high-stakes installations where failure is not an option.

Quality Assurance

Every batch is tested for cold crushing strength, apparent porosity, bulk density, and refractoriness under load before shipment. After delivery, REBO’s team provides performance reviews, on-site inspections, and failure analysis when needed. If a lining underperforms, we identify the root cause and deliver a documented corrective recommendation because our goal is to ensure the current installation performs exactly as engineered.

Customized Service Process

REBO’s customization starts with a structured technical intake covering temperature range, chemical environment, mechanical load, and shutdown schedule. Our engineers then develop a tailored material specification and lining geometry, with samples and test reports provided before full production. A dedicated project coordinator manages timelines and logistics through to delivery every step traceable, every specification documented.

Technology Parameters of REBO Standard Corundum Bricks

Manufacturing equipment mixes high-purity industrial alumina with different additives. REBO melts this mixture in an electric arc furnace at high temperature. Then we pour the melted material into molds. The material cools and forms into fused corundum bricks. These high temp refractory bricks have a high alumina content. Please see the data sheet for its parameters.

Item		GYZ-99	GYZ-90	GYZ-80
Al2O3, %	≥	99	90	80
SiO2, %	≤	0.2	8	18
Fe2O3, %	≤	0.2	0.2	0.3
Bulk Density, g/cm3	≥	3.2	3	2.8
Apparent Porosity, %	≤	19	18	18
Cold Crushing Strength, MPa	≥	100	100	100
0.2MPa Refractoriness Under Load, ℃	≥	1700	1700	1700

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Industry-Specific Corundum Brick Types

By Chemical Purity

95% Alumina Corundum Brick

Operating Temperature: 1600–1750°C;

High purity; strong resistance to chemical corrosion;

Used for metallurgical furnaces, petrochemical reactors, high-temperature chemical furnaces;

99% High-Purity Corundum Brick

Operating Temperature: >1800°C;

Top-tier refractoriness and chemical stability;

Used for Gasifiers, ammonia synthesis converters, high-end ceramic kilns.

By Manufacturing Process

Sintered Corundum Bricks

Operating Temperature: >1700°C;

Resistant to acid/alkali slags; good thermal shock stability;

Used for blast furnaces/hot blast stoves, glass kilns, petrochemical cracking furnaces.

Fused-Cast Corundum Bricks

Operating Temperature: 1600–1800°C;

Fused and cast at temperatures >2000°C; dense structure with low porosity; superior corrosion resistance;

Used for ladle linings, high-temperature zones in glass kilns.

By By Raw Materials/Crystalline Phase Composition

White Corundum Bricks

Operating Temperature: >1700°C;

High-purity white corundum raw materials; excellent chemical stability; high refractoriness;

Used for Ladle castables, refining furnaces, electronic ceramic kilns.

Corundum Mullite Brick

Operating Temperature: 1650–1790°C;

Outstanding thermal shock stability; low high-temperature creep rate;

Used for Rotary kilns, furnaces subject to frequent thermal cycling.

Silicon Corundum Bricks

Operating Temperature: 1200–1400°C.

Good thermal conductivity; resistant to abrasion and alkalis; low coefficient of thermal expansion;.

Used for Kiln mouths in cement rotary kilns, aluminum electrolytic cells.

Chrome Corundum Bricks

Operating Temperature: 1650–1800°C;.

Highest resistance to slag and molten glass erosion;

Used for glass furnace throats, non-ferrous smelting furnaces, waste incinerators.

Zirconia Corundum Bricks

Operating Temperature: 1700–1800°C.

Extremely low coefficient of thermal expansion;

Used for glass melting furnaces (core zones), electric arc furnace ladles.

Features of Corundum Brick

High-Temperature Performance
Stable above 1800°C without deformation.
Load-Bearing Strength
Cold crushing strength up to 340MPa.
Wear Resistance
Withstands mechanical erosion in abrasive environments.
Chemical Stability
Al₂O₃ ≥90%; resists slags, molten metals, corrosive gases.

Dimensional Stability
Low thermal expansion across extreme temperatures.
Slag Penetration Resistance
Low porosity extends service life.
Thermal Shock Resistance
Endure 30+ rapid cooling cycles without cracking.
High Purity
Zero impurities; safe for precision sintering processes.

Custom Corundum Brick Manufactured to Your Specifications

Standard rectangular bricks work well for straightforward flat walls and simple lining structures. But in practice, most high-temperature industrial furnaces are not simple. That’s why REBO offer full custom shape manufacturing for corundum bricks, covering the full range of configurations used in industrial furnace design. Find more applications on YouTube.

Arch and key bricks: for furnace crowns and domed roofs requiring tight radial fit.
Wedge and tapered bricks: for curved walls, circular vessels, and rotary kilns.
Tongue and groove bricks: for interlocking joints that resist displacement under thermal movement.
Skew and angle bricks: for non-perpendicular wall intersections and transition zones.
Checker bricks: for regenerator and heat recovery applications requiring open-channel flow.
Custom profile bricks: produced from customer-supplied drawings for proprietary furnace designs.

Corundum Brick for Every Application

Standard rectangular bricks work well for straightforward flat walls and simple lining structures. But in practice, most high-temperature industrial furnaces are not simple. That’s why we offer full custom shape manufacturing for corundum bricks, covering the full range of configurations used in industrial furnace design:

Industry	Equipment	Specific Part/Location
Iron & Steel Metallurgy	Blast furnace, Electric arc furnace (EAF), Steel ladle, Tundish	Belly/lower stack lining, slag line bricks, EAF roof
Glass Manufacturing	Glass melting furnace, Regenerator	Tank wall, throat, checker bricks, crown
Petrochemical Industry	Secondary reformer, Gasifier, Cracking furnace	Reactor tube lining, furnace hearth working layer
Cement/Lime Rotary Kilns	Rotary kiln	Sintering zone, transition zone, kiln outlet
Non-Ferrous Metals	Aluminum reduction cell, Copper smelting furnace	Cell lining, furnace wall working layer
Waste Incineration	Incinerator	Combustion chamber lining, slag discharge port
Specialty Ceramics	High-temperature sintering kiln	Kiln furniture, shelf/support structure

Certificate for Global Procurement Standards

REBO holds ISO 9001, ISO 14001, and CE certifications, and provides a full third-party test report with every shipment. Our quality system is built to meet the high alumina brick supplier qualification standards of global industrial customers, so your procurement team has everything they need, from day one.

REBO Corundum Brick Matching Solutions

A complete lining system needs multiple materials. Proper matching extends kiln life and reduces maintenance costs. We offer the following matching suggestions.
Bonding Materials for Masonry
We recommend refractory mortar or corundum castable. These materials fill brick joints and form a solid structure. They also prevent hot gas penetration.

Insulation Layer
The inner layer uses ceramic fiber blanket or ceramic fiber modules. We also recommend insulating firebricks. This layer reduces heat loss. It protects the furnace shell and lowers the outer wall temperature.

Matching Refractory Bricks for Different Kiln Zones
Different kiln zones require different refractory bricks.

The transition zone uses high alumina bricks.
The metallurgical furnace slag line area uses magnesia carbon bricks.
The glass furnace crown uses silica bricks.

FAQs About Corundum Refractory Bricks

Q: What Are The Limitations Of Corundum Bricks?

A: Common issues include high cost compared to other refractory bricks, susceptibility to thermal spalling if the temperature changes too rapidly, and potential reaction with alkaline substances (e.g., alkaline slags or vapors) leading to corrosion.

Q: How Can Thermal Spalling In Corundum Bricks Be Prevented?

A: To prevent thermal spalling, gradual heating and cooling cycles should be used, the furnace temperature should be controlled to avoid sudden fluctuations, and proper installation with expansion joints is recommended.

Q: Can Corundum Bricks Come Into Contact With Molten Metals?

A: Yes, but compatibility depends on the metal type. Corundum bricks resist most molten non-ferrous metals (e.g., aluminum, copper) but may react with highly alkaline or reducing atmospheres. They are generally not suitable for contact with molten iron due to potential reactions.

Q: How To Distinguish High-Quality Corundum Bricks From Low-Quality Ones?

A: High-quality corundum bricks have high bulk density (>3.0 g/cm³), low apparent porosity (<20%), uniform color and texture, and high cold crushing strength. Low-quality ones may have visible cracks, uneven color, or lower density.

Q: What Is The Service Life Of Corundum Bricks Under Normal Conditions?

A: Depending on operating conditions, corundum bricks can last from several months to several years. Under optimal conditions (stable temperature, no chemical attack), they can last over 5–10 years.