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Product description of Mullite castable
Mullite castable is a refractory castable made of high quality porous mullite aggregate mixed with fine powder and additives. Mullite castable with high temperature can be directly contacted with flame as working lining to achieve high temperature and energy saving.
Features of Mullite castable
Mullite castable has the characteristics of high strength, good volume stability and excellent thermal shock resistance. It is resistant to erosion, erosion and wear in use.
Applications of Mullite castable
Mullite castable has high temperature and can be used as working lining directly in contact with flame. It is suitable for tubular heating furnace, light diesel, ethane cracking furnace lining, atmospheric and decompression furnace, sulfur recovery device, steam boiler, turtleshell mesh insulation layer, two cylinders and pipe insulation single layer, other industrial furnace door, fire viewing hole, observation hole door lining, etc.
Mullite castables performance index
| Product Grade | MJ55 | MJ60 | MJ65 | MJ70 |
| Al2O3 content, % ≥ | 55 | 60 | 65 | 70 |
| Bulk density, g/cm3 ≥ | 2.2 | 2.3 | 2.4 | 2.5 |
| Flexural strength, MPa ≥ | 7 | 7 | 8 | 9 |
| Compressive strength, MPa ≥ | 30 | 35 | 40 | 45 |
| Linear variation(%) ≤ | ±0.5 | ±0.5 | ±0.5 | ±0.5 |
| Maximum use temperature, ℃ | 1450 | 1500 | 1550 | 1600 |