CUMILOX 90
CUMILOX High Alumina refractories are produced from fused and sintered alumina for high purity range from 85 – 99.5% alumina. Calcined Bauxite, Chamotte, etc. are used for 85% alumina and below. High purity alumina, being a stable oxide, is inert to corrosive attack in oxidizing atmospheres and can also withstand highly reducing atmospheres. It can also withstand high temperature hydrogen attack and is indispensable in applications which encounter hydrogen attack. CUMILOX possesses all these inherent characteristics of alumina and more.
PROPERTIES
| PRODUCT NAME | CUMILOX 90 | ||
| 90% Alumina, Fused alumina with secondary mullite bond | |||
| PROPERTIES | UNIT | Limit Value | Typical Value |
| Maximum Hot Face Temperature | o C | 1650 | 1650 |
| Bulk Density | gm/cc | 2.95 | 3 |
| Apparent Porosity | % | 18 | 17 |
| Cold Crushing Strength | Kg/cm2 | 1000 | 1050 |
| Modulus of Rupture | Kg/cm2 | ||
| At Room Temperature | 175 | 190 | |
| At 1250o C | – | – | |
| Reheat Change | % | ||
| After heating at 1450°C for 6 hrs. | +/-0.5at1600°C/2 hrs. | – | |
| Thermal Conductivity | W/m K | ||
| At 800o C Hot Face Temperature | 2.9 max. | 2.75 | |
| At 1000o C Hot Face Temperature | 2.7 max. | 2.65 | |
| At 1200o C Hot Face Temperature | 2.8 max. | 2.65 | |
| Chemical Analysis | % | ||
| Al2O3 | 89.0 min. | 90.65 | |
| SiO2 | 10.0 max. | 8.75 | |
| Fe2O3 | 0.30 max. | 0.21 | |
| P2O5 | – | – | |
| TiO2 | – | – | |
| Recommended Laying Mortars | CUMIBOND LA 282 | ||