Usage of tabular corundum in the production of fireproof doors

| **Application site** | **Function** | **Recommended Specifications** |

| **Fire Door Core Board Filling** | Replace the traditional aluminium silicate cotton and delay the deformation of the door body at high temperature 1-3mm particles, accounting for 30-50% |

| **Lock/Hinge Reinforcement**| Wrap metal parts to prevent softening at high temperatures (melting point 2050°C) | 0.5-1mm fine powder binder |

| **Door Crack Seal** | Added to ceramic fibre sealing strips for enhanced high-temperature sealing 200-400 mesh micronized powder |

| **SURFACE FIREPROOF COATING** | Mixed inorganic paints are sprayed to form a thermal barrier | 325 mesh powder, the addition amount is 20% |

Tabular corundum significantly improves the safety and longevity of fire doors by reinforcing the refractory skeleton and optimising the sealing and coating, especially in the high-end market. Companies need to balance cost and performance, focus on key applications such as lock reinforcement and door core filling, and optimise particle grading and moisture protection processes to achieve the best results.