Features of Corundum Mullite Brick
●High temperature strength;
●High temperature creep resistance;
●thermal shock resistance and erosion resistance;
●More than 85% Al2O3 and 0.45% Fe2O3;
●Resistant to nonferrous metals of aluminum and zinc erosion;
●More than 19% apparent porosity;
●More than 55MPa cold crushing strength & More than 1700℃ refractoriness under load.
Technical Data
| Item/Index | Mullite Bricks | Resintering Fused Mullite Bricks | Mullite-Corundum Bricks | Corundum-Mullite Bricks |
| Al2O3 | ≥70% | ≥75% | ≥80% | ≥90% |
| SiO2 | ≤25% | ≤23% | ≤18% | ≤8% |
| Fe2O3 | ≤0.5% | ≤0.5% | ≤0.5% | ≤0.3% |
| Apparent Porosity | ≤17% | ≤14% | ≤19% | ≤18% |
| Bulk Density | ≥2.55g/cm | ≥2.65g/cm | ≥2.70g/cm | ≥2.90g/cm |
| Cold Crushing Strength | ≥90MPa | ≥100MPa | ≥80MPa | ≥100MPa |
| Initial Refractoriness Under Load | ≥1630℃ | ≥1700℃ | ≥1650℃ | ≥1700℃ |
Application
Corundum mullite bricks are widely used in various high-temperature industrial furnaces, such as lime kilns, melting furnaces, etc., as refractory materials.