High Alumina Bricks Solutions
REBO offers a complete product line of high-alumina refractory bricks, featuring alumina content ranging from 48% to 80%. Furthermore, we provide precise product selection recommendations tailored to your working conditions. Every batch of products undergoes rigorous test and is accompanied by a comprehensive quality inspection report to ensure the quality standards align with international norms.report, ensuring our quality standards align with international norms.
Leveraging years of accumulated industry expertise, REBO high-alumina bricks are widely utilized across sectors such as steel, cement, glass, petrochemicals, non-ferrous metals, and electric power. We also provide customers with specialized technical support, including masonry recommendations and comprehensive furnace lining planning.
Backed by a global supply network spanning over 50 countries and a direct-from-factory supply model, we ensure stable and efficient delivery at competitive prices. From material selection consultation to project implementation, we provide our customers with end-to-end, one-stop refractory material solutions throughout the entire process.
High Alumina Bricks Specifications
All high alumina fire bricks are manufactured in strict accordance with Chinese national standard GB/T 2988 and tested batch by batch. In particular, REBO supplies the following standard grades: LZ series (classified by Al₂O₃ content) and SK series (classified by national standard), together covering a wide range of application temperatures and service conditions. Standard refractory bricks specifications are available upon request.
| Item | LZ-80 | LZ-75 | LZ-70 | LZ-65 | LZ-60 | LZ-55 | LZ-48 | |
|---|---|---|---|---|---|---|---|---|
| Al2O3, /% | ≥ | 80 | 75 | 70 | 65 | 60 | 55 | 48 |
| Apparent Porosity, % | ≤ | 21 | 24 | 24 | 24 | 26 | 22 | 22 |
| Cold Crushing Strength, MPa | ≥ | 70 | 60 | 55 | 50 | 45 | 45 | 40 |
| 0.2MPa Refractoriness Under Load, ℃ | ≥ | 1530 | 1520 | 1510 | 1500 | 1430 | 1450 | 1420 |
| Permanent Linear Change, % | 1500℃*2h -0.4~0.2 |
1450℃*2h -0.4~0.1 |
||||||
| Item/Grade | SK-36 | SK-38 | |
|---|---|---|---|
| Al2O3, /% | 48-55% | 65-70% | |
| Fe2O3, % | 2.5 | 2.3 | |
| Apparent Porosity, % | 22 | 20 | |
| Bulk Density, g/cm³ | 2.2-2.25 | 2.25-2.35 | |
| Cold Crushing Strength, MPa | ≥ | 45 | 50 |
| Refractoriness underload, 0.2MPa, °C | ≥ | 1380 | 1400 |
| Refractoriness | ≥ | 1780 | 1810 |
| Thermal Expansion at 1000℃(%) | ≤ | 0.4 | 0.4 |
Which High Alumina Brick is Right for Your Furnace?
From standard SK-grade high alumina lining bricks to custom-engineered solutions, REBO supplies the full range of high alumina firebricks for steel, cement, glass, and non-ferrous metal industries. Specifically, Al₂O₃ content ranges from 40% to 99%, including popular options such as the 70 alumina fire brick. With that in mind, find your match below.
Al₂O₃ content available: 60%, 65%, 70%, 75%, 80%.
By Alumina Content and Function
60-80% Al₂O₃ High Alumina Bricks
SK-Grade High Alumina Refractory Bricks
Spalling-Resistant Refractory Bricks
Lightweight Insulating Refractory Bricks
Phosphate-Bonded High Alumina Bricks
Low Creep High Alumina Refractory Brick
By Shaped & Application-specific
Arch High Alumina Refractory Bricks
Anchor High Alumina Refractory Bricks
Curved High Alumina Refractory Bricks
Steel Ladle High Alumina Refractory Bricks
Checker High Alumina Refractory Bricks
Lining High Alumina Refractory Bricks
High Alumina Bricks Properties
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High Refractoriness:Withstands temperatures up to 1790°C.
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High Load-Bearing Strength:Maintains structure under continuous mechanical stress.
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Excellent Slag Resistance:Resists both acidic and alkaline slag erosion.
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Good Thermal Shock Resistance:Survives repeated rapid heating and cooling cycles.
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Low Porosity:Dense structure prevents gas and slag penetration.
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Strong Chemical Stability:Inert to most molten metals and corrosive gases.
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Long Service Life:Outlasts standard fireclay bricks in high-temperature zones.
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Versatile Al₂O₃ Content:Available from 48% to 80% to match specific application needs.
Why Choose REBO High Alumina Lining Bricks?
From raw material sourcing to final delivery, every REBO brick is built to perform in the most demanding high-temperature environments. As high alumina fire bricks manufacturers, REBO has strong manufacturing, design, and solution capacity.
REBO uses selected high-grade alumina clinker and bonded clay sourced and tested before entering production. No compromises at the start means no failures at the furnace.
Al₂O₃ ≥ 30%
All bricks are fired at 1500-1600°C in our 168-meter natural gas tunnel kilns, ensuring a dense, uniform microstructure and consistent refractoriness above 1420°C.
2 × 168m tunnel kilns
Every production batch goes through incoming raw material testing, in-process checks, and outgoing inspection. You receive a full quality report with each shipment not just a certificate.
Third-party reports available
With 400–1000T hydraulic presses, we maintain tight dimensional tolerances across high-volume orders critical for large furnace lining projects where brick consistency directly affects service life.
Mass production and custom sizes supported
High thermal shock resistance and excellent load-bearing performance at temperature mean fewer unplanned shutdowns whether in electric arc furnaces, glass tanks, or cement rotary kilns.
Physical chemistry laboratory for testing
Not sure which grade fits your operating conditions? Our engineering team reviews your furnace type, temperature, and atmosphere and recommends the right specification at no extra cost.
Free consultation
High Alumina Refractory Bricks Across Various Industries
REBO high alumina refractory bricks are installed in kilns, furnaces, and ladles worldwide. In particular, below are the key application scenes and real-world results from our customers. To illustrate, the application examples below represent real installations and feedback from our global customers engineers and procurement teams who chose REBO for both technical reliability and competitive factory high alumina bricks price.
Steel & Metallurgy
Requires bricks with high slag resistance and thermal shock stability under rapid temperature swings.
Direct contact with molten steel. Demands high density, low porosity, and erosion resistance.
Cement Industry
Subject to mechanical stress, alkali attack, and continuous rotation. Spalling resistance is critical.
High dust erosion and abrupt temperature changes demand abrasion-resistant, thermally stable bricks.
Glass & Ceramics
Checker bricks must resist alkali vapour, thermal cycling, and maintain heat exchange efficiency over 5–8 year campaigns.
Long continuous operation at 1300–1400°C. Dimensional precision matters for tight stacking and kiln car flatness.
Non-ferrous Metals
Must resist aluminum penetration and molten metal corrosion. Phosphate-bonded grades preferred.
High-temperature oxidizing atmosphere combined with slag attack demands high Al₂O₃ content and dense structure.
Continuous operation under mechanical load and CO₂-rich atmosphere. Abrasion and thermal stability are paramount.
Similar demands to cement kilns but with stronger abrasive wear from lime particles.
Certificate for Global Procurement Standards
REBO holds ISO 9001, ISO 14001, and CE certifications, and furthermore, provides a full third-party test report with every shipment. As a result, our quality system is built to meet the high alumina brick supplier qualification standards of global industrial customers, so ultimately, your procurement team has everything they need, from day one.
Please see the third-party certification on REBO YouTube.
Related Products of High Alumina Refractory Bricks
FAQs About High Alumina Refractory Bricks
Q: Does Higher Al₂O₃ Content Always Mean Better Performance?
Q: What Is the Standard Size, And Can You Supply Custom Shapes?
Yes, beyond standard bricks, high alumina refractories are routinely manufactured in custom shapes for specific furnace positions.
