Mullite insulation bricks are made of calcined mullite and alumina powder and shaped by high-pressure presses or casting process in different applications.
They contain stable mullite as the main phase structure when fired at elevated temperatures.
1. High-temperature resistance
2. Good thermal shock resistance
3. Lower thermal conductivity
4. Good corrosion resistance
5. Lower bulk density with lightweight
They are widely used for the inner and back lining of the typical furnace, Such as annealing furnace, carburizing furnace, galvanizing furnace, roller kiln, cracking furnace, etc.
| Material | Mullite, Alumina |
|---|---|
| Application | Refractory |
| Typical Size | 230x114x75/65mm |
| Packing | Pallet |
| Index | Mullite Insulating Bricks | |||||
|---|---|---|---|---|---|---|
| Model | FT26 | FT26 | FT28 | FT28 | FT30 | FT30 |
| Bulk Density g/cm3 | 0.8 | 1 | 0.8 | 1 | 1 | 1.1 |
| Permanent Linear Change | 1400℃×12h %≤ | 1500℃×12h %≤ | 1600℃×12h %≤ | |||
| -0.65 | -0.5 | -1 | -0.7 | -0.9 | -0.7 | |
| Cold Crushing Strength ≥MPa | 2.3 | 3.2 | 2.3 | 3.3 | 3 | 3.5 |
| Thermal Conductivity 350℃w/m.k | 0.25 | 0.32 | 0.28 | 0.34 | 0.4 | 0.43 |
| Al2O3 % ≥ | 55 | 56 | 64 | 66 | 72 | 72 |
| Fe2O3 % ≤ | 0.9 | 1 | 0.75 | 0.65 | 0.55 | 0.55 |
