Magnesia Brick
Application:
Magnesia brick is mainly used in alkaline open-hearth furnaces, electric furnace bottoms and furnace walls for steelmaking.
High Working Temperature
Strong Resistance to Alkaline Slag
High Thermal Conductivity
High Softening Temperature Under Load
Technical Data:
| Item | M – 98 | M – 97A | M – 97B | M – 95 | M – 91 | |
|---|---|---|---|---|---|---|
| MgO, % | ≥ | 97.5 | 97.0 | 96.5 | 95.0 | 91.0 |
| SiO₂, % | ≤ | 1.00 | 1.20 | 1.50 | 2.00 | / |
| CaO, % | ≤ | / | / | / | 2.00 | 3.00 |
| Apparent Porosity, % | ≤ | 16 | 16 | 18 | 16 | 18 |
| Bulk Density, g/cm³ | ≥ | 3.00 | 3.00 | / | 2.95 | 2.90 |
| Cold Crushing Strength, MPa | ≥ | 60 | 60 | / | 60 | 60 |
| 0.2MPa Refractoriness Under Load, °C | ≥ | 1700 | 1700 | / | 1650 | 1560 |
| Permanent Linear Change, % | 1650°C*2h – 0.2 – 0 | 1650°C*2h – 0.2 – 0 | / | 1600°C*2h – 0.3 – 0 | 1600°C*2h – 0.5 – 0 |
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