• Alumina-zirconia-silica fusion cast refractory
• Homogeneous structure
• Resistance to thermal shock
APPLICATION
REHEATING FURNACE HEARTHS
Saint-Gobain Ceramics and SEPR offer steelmakers a comprehensive range of products for reheating furnaces. Magmalox® products are used in both pusher and walking-hearth furnaces. This range is based on over 60 years’ experience in minimizing costs and soak-zone repairs while raising productivity. Magmalox® products help steelmakers to optimize the behavior of each area of the furnace, to balance wear and to substantially increase campaign life.
Benefits include:
- Record tonnage of reheated slab or billet per campaign
- Improved surface quality of reheated products
- Easy to install, rapid heat-up, no (or very light) intermediate repairs, hence reduced downtime
OTHER APPLICATIONS
Magmalox® products are recommended for a range of furnace applications calling for outstanding resistance to erosion and corrosion, including:
- Waste incinerators: Stoker upper walls
- Steelworks: Crash deck for sinter plants
PRINCIPAL CHARACTERISTICS
APPLICATION
REHEATING FURNACE HEARTHS
| PRINCIPAL CHARACTERISTICS | ||||
|---|---|---|---|---|
| Typical Chemical Analysis (%) | RN | DR | 550 | 555 |
| Al2O3 | 73 | 73 | 73 | 95 |
| SiO2 | 19 | 19 | 6 | 0.5 |
| ZrO2 | 5.5 | 5.5 | 20.5 | – |
| Na2O | 1.05 | 1.05 | 0.5 | 4.1 |
| Fe2O3 | 0.7 | 0.7 | <0.3 | <1 |
| CaO | 0.5 | 0.5 | <0.3 | <1 |
| TiO2 | 0.25 | 0.25 | <0.3 | <1 |
| Typical Crystallographic Analysis (%) | ||||
| Corundum | 39 | 39 | 71 | 45 |
| Mullite | 41 | 41 | – | – |
| Zirconium Oxide | 5 | 5 | 20 | 53 |
| Beta Alumina | – | – | – | 2 |
| Vitreous Phase | 15 | 15 | 9 | 2 |
| TYPICAL PHYSICAL PROPERTIES | ||||||
|---|---|---|---|---|---|---|
| Property | Units | Temperature | RN | DR | 550 | 555 |
| Density In Block Form | g/cm³ | – | 3 | 2.9 | 3.55 | 3.17 |
| Expansion | % | 150°C | 0.8 | 0.8 | 0.9 | 0.95 |
| Thermal Conductivity | W/m·K | 1250°C | 4.6 | 3.1 | 9.2 | 6.5 |
| Hot Crushing Strength | MPa | 1350°C | 45 | – | 120 | 156 |
| Hot Erosion / Abrasion Resistance | – | – | + | – | ++ | ++ |
| Slag Build Up Resistance | – | – | ++ | ++ | ++ | – |
| Thermal Variation Resistance | – | – | + | ++ | + | + |