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High-Quality Alumina Bubble Brick from China - Reliable Suppliers & Factory for Industrial Furnaces
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 (1.4-1.7g/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℃ x 3h | ±0.3 | ±0.3 | ±0.3 |
| Coefficient of Thermal Expansion (RT -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 temperature Alumina Bubble Bricks can withstand?
Alumina Bubble Bricks are designed for extreme high-temperature environments and can withstand continuous operating temperatures up to 1800°C.
What makes Alumina Bubble Bricks lighter than standard refractory bricks?
The secret lies in their unique hollow sphere (bubble) structure. This creates a lightweight material with a bulk density of only 1.4-1.7g/cm³, significantly reducing the load on furnace structures.
Are these bricks resistant to chemical corrosion?
Yes, due to their high alumina purity (Al₂O₃ ≥90%), they offer excellent resistance to molten metal, slag, and various chemical media common in metallurgical and petrochemical processes.
How do Alumina Bubble Bricks help in energy saving?
Their low thermal conductivity (≤0.80 - 1.50 W/m·k) provides superior insulation, which minimizes heat loss through furnace walls, leading to significant reductions in fuel or electricity consumption.
In which industries are these bricks most commonly used?
They are widely used in the metallurgy (blast furnaces), ceramic and glass (kiln linings), petrochemical (reforming furnaces), and waste incineration industries.
Do Alumina Bubble Bricks crack under temperature fluctuations?
They have excellent high-temperature volume stability and high mechanical strength, which helps them resist cracking and spalling even under extreme temperature changes.