Mullite castable is a refractory castable made of high-quality porous mullite aggregate, add in fine powder and additives. The critical particle size of mullite aggregate is 12mm; the long-term operation temperature is 1350℃. Mullite castable has high service temperature and can be directly used as a working lining, this can reduce structure weight by 40～60%, thus can be energy saving.
Mullite castable can be used for in petrochemical industry tubular heating furnaces, ethane cracking furnace linings, atmospheric and vacuum furnaces, sulfur recovery devices, steam boilers, tortoise shell insulation layers, two-piece cylinders and pipeline insulation sheets Floor, other industrial furnace door, fire hole, lining of the door.
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Mullite Castable |
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Chemical Analysis (%) |
Al2O3 |
≧60 |
70 |
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SiO2 |
≦30 |
20 |
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Volume Density(g/cm3) |
110℃*24H |
2.3 |
2.5 |
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1100℃*3H |
2.3 |
2.5 |
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Compression Strength |
110℃*24H |
45 |
50 |
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1100℃*3H |
45 |
50 |
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Linear Change After Heating % |
1100℃*3H |
6 |
6 |
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Max Service Temp.(℃) |
≧1600 |
≧1650 |
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(Specification should be different according to different furnaces/kilns.)
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