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Alumina Bubble Brick
Brand: HongTai Refractory
Category: Insulating Fire Bricks
Al2O3: ≥90%
Bulk Density: 1.1-1.5g/cm3
Payment Terms: T/T, Credit Cardse, E-Checking, Alibaba Trade Assurance
Product Information
Bubble alumina bricks are an innovative type of high-temperature insulation material, created by melting and blowing industrial alumina in an electric furnace. Composed primarily of alumina bubbles, these bricks can be fashioned into various shapes and have a maximum operating temperature of 1800℃.
These products boast a high mechanical strength, several times greater than that of standard lightweight materials, while maintaining only half the bulk density of corundum-based materials.
Extensively utilized in industries such as petrochemicals, carbon black, and metallurgy, bubble alumina bricks are employed in gasification furnaces, reaction furnaces, induction furnaces, and other high-temperature or ultra-high-temperature kilns. They have demonstrated significant energy-saving benefits in these applications.
| Index | Level I | Level II | Level III |
| Al2O3, % | ≥98 | ≥98 | ≥98 |
| SiO2, % | ≤1 | ≤1 | ≤1 |
| Fe2O3, % | ≤0.7 | ≤0.7 | ≤0.7 |
| Refractoriness, ℃ | ≥1790 | ≥1790 | ≥1790 |
| Refractoriness under Load, 0.1MPa, ℃ | ≥1600 | ≥1600 | ≥1600 |
| Bulk density, g/cm3, ≤ | 1.2 | 1.4 | 1.6 |
| True porosity, %, ≥ | 62 | 60 | 58 |
| Cold crushing strength, MPa, ≥ | 3 | 10 | 12 |
| Thermal Conductvity, 1100℃, W.(m.k), ≤ | 0.93 | 1.04 | 1.16 |
- Maximum operating temperature: 1800℃
- High mechanical strength
- Low bulk density
- Excellent thermal insulation
- Energy-saving
- Versatile shaping
| Industry | Application | Purpose |
|---|---|---|
| Petrochemical | Gasification furnaces | High-temperature insulation, energy efficiency, reduced heat loss |
| Carbon black | Reaction furnaces | Maintain high temperatures, minimize energy consumption |
| Metallurgical | Induction furnaces | Efficient thermal insulation, improved furnace performance |
| Electric arc furnaces | Insulating linings, energy efficiency, extended furnace life | |
| Ceramic | High/ultra-high-temperature kilns | Insulation linings, energy savings, improved product quality |
| Glass | Glass melting furnaces | Insulation, optimized temperature control, reduced energy consumption |
| Non-ferrous metal | Aluminum electrolysis cells | Lining materials, high temperatures, energy efficiency |
| Heat treatment | Furnaces and ovens | Insulation materials, reduced heat loss, enhanced energy efficiency |
