Corundum Brick - REBO Refractory

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. We melt 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 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

Leave a Message Send Email

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;

Highest Al₂O₃ purity; 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;

High strength (340 MPa); resistant to acid and 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.

Unfired Corundum Bricks

Operating Temperature: 1400–1600°C.

Formed using phosphate binders; requires no high-temperature firing; allows for rapid installation.

Used for rapid kiln repairs, emergency construction.

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;

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, excellent thermal shock resistance, superior resistance to molten glass corrosion;.

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

Endures 30+ rapid cooling cycles without cracking.
High Purity

Zero impurities; safe for precision sintering processes.

Custom Corundum Bricks 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 we offer full custom shape manufacturing for corundum bricks, covering the full range of configurations used in industrial furnace design:

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 Bricks for Every Application

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

Steel & Metallurgy

Electric arc furnace for side wall & roof lining

Requires bricks with high slag resistance and thermal shock stability under rapid temperature swings.

Steel ladle working lining & well block

Direct contact with molten steel. Demands high density, low porosity, and erosion resistance.

Learn More

Cement Materials

Cement rotary kiln for transition zone & burning zone

Subject to mechanical stress, alkali attack, and continuous rotation. Spalling resistance is critical.

Cyclone preheater & clinker cooler

High dust erosion and abrupt temperature changes demand abrasion-resistant, thermally stable bricks.

Learn More

Glass & Ceramics

Float glass tank furnace for regenerator packing

Checker bricks must resist alkali vapour, thermal cycling, and maintain heat exchange efficiency over 5–8 year campaigns.

Ceramic tunnel kiln for car & side wall lining

Long continuous operation at 1300–1400°C. Dimensional precision matters for tight stacking and kiln car flatness.

Learn More

Non-ferrous Metals

Aluminum melting & holding furnace working lining

Must resist aluminum penetration and molten metal corrosion. Phosphate-bonded grades preferred.

Copper smelting reverberatory furnace for arch & side wall

High-temperature oxidizing atmosphere combined with slag attack demands high Al₂O₃ content and dense structure.

Learn More

Lime Industry

Lime shaft kiln for burning zone lining

Continuous operation under mechanical load and CO₂-rich atmosphere. Abrasion and thermal stability are paramount.

Rotary lime kiln for transition & burning zone

Similar demands to cement kilns but with stronger abrasive wear from lime particles.

Learn More

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.

Corundum Bricks 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 High Alumina Refractory Bricks

Does Higher Al₂O₃ Content Always Mean Better Performance?

Not necessarily. This is one of the most common misconceptions in refractory procurement. Many buyers focus exclusively on alumina content, assuming that higher Al₂O₃ automatically equates to better performance. In reality, a brick’s performance is determined by a complex combination of chemical composition, physical characteristics, thermal behavior, mechanical strength, and manufacturing quality.

What Is the Standard Size, And Can You Supply Custom Shapes?

The international standard brick size is 230 × 114 × 65 mm (approximately 9″ × 4.5″ × 2.5″), which fits most standard kiln and furnace designs worldwide.
Yes, beyond standard bricks, high alumina refractories are routinely manufactured in custom shapes for specific furnace positions.

What are the advantages of High Alumina Bricks over Fire Clay Bricks?

High alumina bricks offer significantly higher refractoriness, a higher softening temperature under load, and better mechanical strength. Most importantly, they possess much better slag resistance, particularly against neutral and acidic slags in industrial furnaces.

How Do You Ensure the Quality of High Alumina Bricks for International Shipping?

Every batch undergoes a 6-stage quality control process, including raw material testing, ultrasonic internal flaw detection and dimension tolerance checks. For export, we use international-standard seaworthy packaging: fumigated wooden pallets with high-strength plastic shrink wrap and steel banding.

Why Should We Choose REBO High Alumina Bricks over Cheaper Alternatives?

The “Standard” is in the details. While others might use lower-grade bauxite to cut costs, REBO uses high-purity, homogenized raw materials. This results in lower creep rates and higher residual strength, meaning fewer maintenance shutdowns and a lower Total Cost of Ownership (TCO) for your facility.