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Brief introduction of mullite insulation brick JM28
Mullite insulation brick is a high alumina refractory with mullite as the main crystalline phase. The content of alumina is about 65% ~ 75%. Mullite brick is made of mullite by high temperature combustion and high pressure molding. In addition to mullite, the lower alumina content also contains a small amount of glass phase and quartolite; Higher alumina content also contains a small amount of corundum.
Features of mullite insulation brick JM28
Low thermal conductivity
High fire resistance
Low heat capacity
Low shrinkage rate
Good heat insulation performance
High strength, corrosion resistance
Application of mullite insulation brick JM28
Glass industry steel industry
Ceramics industry Non-ferrous metal industry
Electrolytic aluminum industry power industry
Hot surface fire lining other fire lining
Parameters of JM28 mullite insulation bricks
| JM-28 Model | Volume Density | Reheating Linear Change Rate | Cold Crushing Strength | Modulus of rupture | Thermal Conductivity | Al2O3 | SiO2 | Fe2O3 |
| – | g/cm3 | 1500℃*12h% | MPa | MPa | W/m·K | % | % | % |
| A | 0.8 | -1 | 2.5 | 1.4 | 0.28 | 64 | 33 | 0.7 |
| B | 0.9 | -0.8 | 2.8 | 1.6 | 0.32 | 65 | 32 | 0.6 |
| C | 1 | -0.7 | 3.5 | 1.8 | 0.34 | 66 | 31 | 0.6 |