Items |
High alumina cement refractory castable |
Clay Refractory castable |
High alumina refractory
castable |
Alumina-40 |
Alumina-50 |
Alumina-55 |
Alumina-65 |
Bulk Density |
Kg/m3 |
≥1900 |
≥2100 |
≥2200 |
≥2300 |
Drying compressive
strength |
MPa |
≥20 |
≥23 |
≥20 |
≥23 |
Drying strength |
MPa |
≥4 |
≥5 |
≥4 |
≥5 |
800 ° C high temperature
residual strength |
% |
≥40 |
≥50 |
≥40 |
≥50 |
Thermal shock stability |
Time |
≥15 |
≥15 |
≥15 |
≥15 |
After the burning, the line changes, the temperature is kept for 3 hours, and the test temperature is not more than 1%. |
℃ |
≥1200 |
≥1250 |
≥1300 |
≥1350 |
Refractoriness |
℃ |
≥1650 |
≥1670 |
≥1700 |
≥1730 |
Al2O3 |
% |
≥40 |
≥50 |
≥55 |
≥65 |
RO, R2O and other
impurities content |
% |
<6 |
<5 |
<4.5 |
<4 |
Refractory aggregate maximum
particle size
|
When the casting thickness is ≤60mm, ≤5 |
When the casting thickness is 60mm~100mm, ≤10 |
When the casting thickness is ≥100mm, ≤15 |
Note: In this list, aluminum-40~ aluminum-70 refers to the content of AL2O3 in the finished product, thereby indicating the grade of such materials. |
|