Corundum mullite insulation bricks adopt high purity raw materials and unique manufacturing technology to avoid the influence of impurities and structural defects on the properties of the products to the maximum extent. Its features: lower thermal conductivity, lower bulk density, light weight character, lower creep rate in high temp, good thermal shock resistance performance, higher temperate with good refractoriness. Corundum mullite insulation bricks can be used in the thermal preservation layers in various industrial furnaces and kilns in metallurgical industry, ceramic industry, chemical industry and can be used in direct contact with the flame.
| INDEX PRODUCT | RBTGY-80 | RBTGY-80 | RBTGY-80 | RBTGY-75 | RBTGY-70 |
| Refractoriness(℃) | 1700 | 1650 | 1600 | 1600 | 1550 |
| Bulk Density(g/cm3) ≥ | 1.7 | 1.4 | 1.1 | 1.0 | 1.0 |
| Cold Crushing Strength(MPa) ≥ | 50 | 40 | 30 | 25 | 25 |
| 1600℃×12h Permanent Linear Change (%) | 0.2 | 0.2 | 0.18 | 0.18 | 0.17 |
| @0.2MPaRefractoriness Under Load(℃) ≥ | 1650 | 1600 | 1550 | 1550 | 1500 |
| 350±25℃Thermal Conductivity(W/m.k) | 1.5 | 1.2 | 1.0 | 0.7 | 0.7 |
| Al2O3(%) ≥ | 80 | 80 | 80 | 75 | 70 |
| Fe2O3(%) ≤ | 0.40 | 0.40 | 0.35 | 0.30 | 0.30 |
| SiO2(%) ≤ | 18 | 18 | 18 | 20 | 25 |