High Temperature Resistant Hollow Alumina Refractory Bricks
High Temperature Fire Resistant Alumina Hollow Refractory Brick
Alumina Bubble Brick Description
The alumina bubble brick used the alumina hollow ball as the main raw material, high-performance powder as additives, and organic material from the temporary binding agent .After mixing, drying, forming, and firing at high temperature shuttle kiln made.
Alumina Bubble Brick Specifications
1. High purity;
2. High mechanical strength;
3. Low thermal conductivity;
4. Good stability
5. Mainly apply to the insulation layer of coal-water slurry gasifier
6. Excellent thermal insulation
7. Long service life
8. High compressive strength
9. Competitive price
Alumina Bubble Brick Application
Alumina bubble brick is widely used in metallurgy, refractories, light industry, chemical industry, ceramic, glass, electronic industries. It can be used in cracking furnace, Hot Blast Stove, Shuttle kiln, heating furnace, tunnel kiln, push board kiln, pot furnace, and kinds of electric furnace and electrical kiln lining and so on.
Alumina Bubble Brick Physical and chemical index
| Item | RS-85 | RS-90 | RS-99 | |
| Chemical composition | Al2O3 | ≥85 | ≥90 | ≥99 |
| SiO2 | ≤13 | ≤8 | ≤0.2 | |
| Fe2O3 | ≤0.5 | ≤0.5 | ≤0.5 | |
| Apparent Porosity% | 58-62 | 58-62 | 58-62 | |
| Bulk Density g/cm3 | 1.4-1.7 | 1.4-1.7 | 1.4-1.7 | |
| Cold Crushing Strength Mpa | ≥12 | ≥10 | ≥9 | |
| 0.1Mpa Refractoriness Under Load T0.6 °C | ≥1650 | ≥1700 | ≥1700 | |
|
Permanent Linear Change On Reheating (%)1500°CX2h |
±0.3 | ±0.3 | ±0.3 | |
| 20-1300°C Thermal Expansion % (x 10-6) | 0-7.8 | 0-8.0 | 0-8.6 | |
| Thermal Conductivity(Average 800°C) W/(M.K) | ≤0.8 | ≤1.3 | ≤1.5 | |
| Max Service Temperature °C | 1680 | 1700 |
1800 |
|
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