Refractory Insulation Mullite Brick
Insulation Mullite Brick
1)High Temperature Mullite Insulation Fire Brick is manufactured from high-grade refractory powder and materials in good purity, compressed in vacuum and sintered under high temperature.
It covers six temperature classes: 1300C, 1400C, 1500C, 1550C, 1600C, includes standard brick, special-shaped brick, and refractory mortar.
2)Used in various of industrial furnaces, such as metallurgy, construction, ceramic, machinery etc, for liner and backing,
such as cracking furnace, reforming furnace, heating equipment,
refining equipment, hot blast stove, heating furnace, soaking pit,
thermal treatment furnace, resistance furnace, tunnel kiln, roller kiln,
shuttle kiln, immersion bell, glass furnace etc.
Brand | VMC-48 | VMC-49 | VMC-50 | VMC-55 | VMC-57 | VMC-57 | VMC-60 | VMC-67 |
Bulk density g/cm3 ≤ | 0.6 | 0.8 | 1 | 0.6 | 0.8 | 1 | 1 | 1.2 |
Cold Crushing strength Mpa ≥ | 1.5 | 2.5 | 4.2 | 1.5 | 3.2 | 4 | 4 | 5 |
Thermal stability 1100°C (air colling) | 10 | 20 | 20 | 10 | 20 | 20 | 20 | 20 |
Reheating linear change ≤ 1% (°Cxh) | 1300x12 | 1300x12 | 1300x12 | 1400x12 | 1400x12 | 1400x12 | 1500x12 | 1500x12 |
Thermal conductivity 350±25° (W/m.k) ≤ | 0.2 | 0.23 | 0.33 | 0.2 | 0.25 | 0.33 | 0.35 | 0.4 |
Al2O3 % ≥ | 48 | 49 | 50 | 55 | 57 | 57 | 60 | 67 |
Fe2O3 % ≥ | 0.9 | 0.9 | 0.9 | 0.8 | 0.8 | 0.8 | 0.7 | 0.6 |
*High strength and resistance to corrosion,
*High temperature endurance and stability,
*High corundum content;
*Excellent thermal shock resistance,
*Low heat capacity,
*Low content of impurities,
*Have the least contamination to glass liquid.


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