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China Alumina Bubble Brick Factory - Lightweight Refractory Material for Industrial Furnaces Suppliers
⚡ Core Advantages
Superior Thermal Insulation Performance
The unique hollow sphere structure minimizes thermal conductivity, effectively reducing heat loss in high-temperature equipment. Compared to traditional refractory bricks, cutting operational costs significantly.
Lightweight & High Strength
With low bulk density (1.4–1.7 g/cm³), it eases equipment load and simplifies installation. Meanwhile, high alumina purity ensures excellent mechanical strength and wear resistance, avoiding cracking under extreme temperature changes.
Exceptional High-Temp Stability
Made of high-purity alumina (Al₂O₃ ≥90%), it can withstand continuous temperatures up to 1800°C and resist corrosion from molten metal, slag, and chemical media, extending the service life of furnace linings.
📋 Product Parameters
| Item | Alumina Bubble Brick | ||
|---|---|---|---|
| Al₂O₃ % | ≥85 | ≥90 | ≥99 |
| Fe₂O₃ % | ≤0.20 | ≤0.20 | ≤0.20 |
| Bulk Density (g/cm³) | 1.4–1.7 | 1.4–1.7 | 1.4–1.7 |
| Cold Crushing Strength (MPa) | ≥12 | ≥10 | ≥9 |
| Refractoriness Under Load (℃) (0.2MPa, 0.6%) |
≥1650 | ≥1700 | ≥1700 |
| Permanent Linear Change 1600℃ × 3h |
±0.3 | ±0.3 | ±0.3 |
| Coefficient of Thermal Expansion (Room Temp – 1300℃) |
~7.8 | ~0.8 | ~8.6 |
| Thermal Conductivity | ≤0.80 | ≤1.30 | ≤1.50 |
🏭 Detailed Application Scenarios
1
Metallurgical Industry
◎ Widely used in lining of blast furnace hot blast stoves, electric arc furnaces, and ladle tundishes. It resists high-temperature erosion from molten steel and slag, improves thermal insulation effect, and ensures stable production of metallurgical equipment.
2
Ceramic & Glass Industry
◎ Suitable for kiln linings in ceramic tile, sanitary ware, and glass melting furnaces. Its excellent thermal insulation reduces heat loss during firing, maintains uniform furnace temperature, and enhances product quality while saving energy.
3
Petrochemical Industry
◎ Applied in linings of catalytic cracking units, reforming furnaces, and hydrogenation reactors. It withstands high temperatures and chemical corrosion, ensures safe operation of equipment, and extends maintenance cycles.
4
Other High-Temp Equipment
◎ Also used in waste incinerators, industrial boilers, and solar thermal power generation equipment. It adapts to complex high-temperature environments, improves equipment efficiency, and reduces environmental pollution.
✉️ Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.
❓ Frequently Asked Questions
What is the maximum service temperature of Alumina Bubble Brick?
Alumina Bubble Brick can withstand continuous operating temperatures up to 1800°C. Thanks to its high-purity alumina content (Al₂O₃ ≥90%), it maintains structural integrity and thermal stability even under extreme heat conditions, making it ideal for demanding industrial furnace applications.
How does Alumina Bubble Brick compare to traditional refractory bricks in terms of thermal insulation?
Alumina Bubble Brick features a unique hollow sphere structure that significantly minimizes thermal conductivity. Compared to traditional refractory bricks, it provides superior thermal insulation, which effectively reduces heat loss in high-temperature equipment and lowers overall operational energy costs.
What alumina content grades are available, and how do I choose the right one?
We offer three grades: Al₂O₃ ≥85%, ≥90%, and ≥99%. The ≥85% grade is cost-effective for moderate-temperature applications, the ≥90% grade balances performance and economy for most industrial furnaces, and the ≥99% grade is recommended for the most demanding environments requiring maximum purity and corrosion resistance.
Is Alumina Bubble Brick resistant to chemical corrosion from molten metals and slag?
Yes. The high alumina purity of our Alumina Bubble Brick provides excellent resistance to corrosion from molten metal, slag, and various chemical media. This makes it particularly well-suited for metallurgical applications such as blast furnace hot blast stoves, electric arc furnaces, and ladle tundishes.
What industries and equipment types are best suited for Alumina Bubble Brick?
Alumina Bubble Brick is widely used across multiple industries including metallurgy (blast furnaces, electric arc furnaces), ceramics and glass (kiln linings, glass melting furnaces), petrochemicals (catalytic cracking units, reforming furnaces), and other high-temperature applications such as waste incinerators, industrial boilers, and solar thermal power equipment.
What is the bulk density of Alumina Bubble Brick and why does it matter?
The bulk density of Alumina Bubble Brick ranges from 1.4 to 1.7 g/cm³ across all grades. This relatively low density means the brick is lightweight, which reduces the structural load on furnace and equipment frameworks, simplifies installation, and lowers transportation costs — all without compromising mechanical strength or wear resistance.