Mullite Refractory Castable
Mullite Refractory Castables
Mullite refractory castable is mainly made of porous mullite aggregate, and stir into a fine powder and additive. The long term using temperature is 1350℃. It can direct contact with the working lining using flame and achieve high temperature energy saving.
The main composition of mullite refractory castable are high quality porous mullite aggregate. To enhance the performance of this product, professional manufacturers also add appropriate amounts of fine powders and additives. As a high grade high alumina castable can be used as a working lining in direct contact with flames.
Item/Grade HZMJ-55 HZMJ-60 HZMJ-65 HZMJ-70 (Al2O3) ≥/% 55 60 65 70 Bulk Density ≥/ (g/cm³) 2.3 2.4 2.5 2.6 Flexural Strength ≥/MPa 7 7 8 9 Compressive Strength ≥/MPa 40 50 60 70 Permanent Linear Change ≤/% ±0.5 ±0.5 ±0.5 ±0.5
Features
1.Low thermal conductivity.
2.Good heat preservation performance.
3.High mechanical strength.
Application
Mullite refractory castables are used in petrochemical industry tubular heating furnaces, light diesel oil,sulfur recovery devices, steam boilers and pipe insulation floor, other industrial furnace doors, fire holes, observation hole door linings, etc.
