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Product description of Mullite castable
Mullite castable is used at high temperatures as a working lining in direct contact with the flame. It is applied to tube heater, light gas oil, ethane cracking furnace lining, atmospheric and vacuum furnace, sulphur recovery unit, steam boiler, tortoise grate insulating layer, single layer of thermal insulation of barrel and pipeline of two boilers, other industrial furnace doors, fire observation hole and observation hole 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 |