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Brief introduction of mullite insulation brick
The general alumina content of mullite insulation brick is between 65% and 75%. Mullite insulation brick can be directly used in high temperature kiln lining, has been widely used in shuttle kiln, roller kiln, glass and petrochemical kiln.
Features of mullite insulation brick
Good thermal shock resistance.
High refractories, up to 1790℃ or above.
Load softening starting temperature 1600 ~ 1700℃.
Pressure strength 70 ~ 260MPa at room temperature.
Details of mullite insulation brick
Mullite insulation brick has sintered mullite brick and fused mullite brick two kinds. Sintered mullite brick is made from high bauxite clinker and a small amount of clay or raw bauxite as binder. Fused mullite bricks are made of bauxite, industrial alumina and refractory clay, and charcoal or coke particles are added as reducing agents.
Parameters of mullite insulation brick
| JM-26 Model | Bulk Density | Reheating Linear Change Rate | Cold Compressive Strength | Modulus of Rupture | Thermal Conductivity | Al2O3 | SiO2 | Fe2O3 |
| - | g/cm³ | 1400℃*12h | MPa | Mpa | 350℃w/·k | % | % | % |
| A | 0.7 | -0.9 | 2 | 1.2 | 0.21 | 54 | 42.5 | 0.8 |
| B | 0.8 | -0.7 | 2.5 | 1.4 | 0.25 | 55 | 41.5 | 0.8 |
| C | 0.9 | -0.5 | 2.8 | 1.6 | 0.3 | 56 | 40.5 | 0.9 |
| D | 1 | -0.5 | 3.2 | 1.8 | 0.32 | 56 | 40.5 | 0.9 |
More relevant refractory products: Mullite castable