Corundum mullite bricks refers to a high alumina refractory product composed of corundum and mullite main crystal phases. Corundum mullite brick is refractory product made of high purity or purer raw materials. Low melting point oxide impurities reduces its high temperature performance. Pure mullite raw materials synthesized from industrial alumina powder and pure clay, bauxite or silica. The product prepared by using mullite granules as aggregate has good thermal shock resistance, the corundum sand as the aggregate product has good corrosion resistance.
Corundum mullite bricks suitable for large and medium-sized blast furnace bottom, hearth ceramic masonry and wind, iron, slag joint masonry, glass furnace superstructure brick, material brick, cover plate, molded parts, medium temperature carbon black reactor lining and other thermal equipment lining.
Technical Parameter of Corundum Mullite Bricks:
| Item | Mullite Bricks | Re-Sintered Fused Mullite Brick | Mullite Corundum Brick | Corundum – Mullite Brick |
| Index | ||||
| 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/Cm | ≥2.55 | ≥2.65 | ≥2.70 | ≥2.90 |
| Compressive Strength MPa | ≥90 | ≥100 | ≥80 | ≥100 |
| RUL | ≥1630 | ≥1700 | ≥1650 | ≥1700 |
| （0.2MPa,0.6%）℃ |
