Mullite insulation brick holds special grade mullite (3Al2O32SiO2) as the major crystal phase. The content of alumina in mullite insulating brick is 42%-72%. The service temperature could be 1250-1600.
Performance Characters:
Application:
Mullite insulating brick is widely used in different types of high temperature furnaces or kilns. For example, it is widely used for hot-blast furnace, regenerative chamber of glass melting furnace, ceramic kiln, blind angle furnace lining of petroleum cracking system, shuttle kiln, roller kiln and petrochemical burning pits and so on.
Item | JM23 | JM26 | JM28 | JM30 |
AL2O3(%) | 38-44 | 50-58 | 65-70 | 70-73 |
Fe2O3(%) | 1 | 0.9 | 0.8 | 0.7 |
Classification Temperature () | 1350 | 1430 | 1540 | 1600 |
Bulk Density (g/cm3) | 0.6-1 | 0.8-1 | 0.8-1 | 0.8-1 |
Reheating Linear Change (%) CT-308h | 1250 0.5 | 1400 -0.5 | 1500 -0.5 | 1550-0.5 |
Cold Crushing Strength (Mpa) | 3.0-4.5 | 3.0-4.5 | 3.0-4.5 | 3.0-4.5 |
Modulus of Rupture (Mpa) | 1.5 | 1.7 | 1.8 | 2 |
Thermal conductivity400(W/m.k) | 0.25 | 0.27 | 0.32 | 0.41 |
Thermal Expansion1000%) | 0.5 | 0.7 | 0.8 | 0.9 |