unshaped refractory
High-Alumina Castable
High-alumina castable has good fluidity and is convenient to install; after pouring it forms a complete monolithic lining with excellent sealing. It is high-temperature resistant, wear-resistant and scouring-resistant,
with good thermal stability, suitable for various industrial kilns. It resists acid flue-gas erosion, and is easy to repair, with low overall usage cost,
making it the mainstream preferred monolithic refractory material for high-temperature equipment linings.
| Grade | Al₂O₃ Content | Long-term Service Temp. | Typical Applications | |
| 60G | ≥60% | 1350〜1400℃ | Medium-temperature boilers, heat-treatment furnaces, flues; cost-effective grade | |
| 70G | ≥70% | 1450〜1500℃ | Cement kiln preheaters, lime kilns, heating furnaces (largest market volume) | |
| 75G | ≥75% | 1500〜1550℃ | Electric arc furnaces, ladles, high-temperature cyclone barrels, wear-resistant parts | |
| 80G | ≥80%〜85% | 1550〜1650℃ | High-purity conditions and demanding slag-erosion zones (close to corundum castable) |