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| Refractory Bricks-Magnesia Bricks |
| Magnesia Bricks |
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Technical Data
| Item | 97A | 97B | 95A | 95B | 93 | 91 | 89 | 87 |
| MgO % ≥ | 97 | 96.5 | 95 | 94.5 | 93 | 91 | 89 | 87 |
| CaO % ≤ | - | - | 2.0 | 2.0 | 2.0 | 3.0 | 3.0 | 3.0 |
| SiO3 % ≤ | 1.0 | 2.0 | 2.0 | 2.0 | 3.5 | - | - | - |
| Apparent porosity % ≤ | 16 | 18 | 18 | 18 | 18 | 18 | 20 | 20 |
| 0.2Mpa refractoriness under load(℃)≥ | 1700 | 1700 | 1650 | 1650 | 1600 | 1560 | 1550 | 1540 |
| Cold crush strength Mpa ≥ | 60 | 60 | 60 | 60 | 60 | 60 | 50 | 50 |
| Linear change after reheating (1650℃×2h)% | 0-0.2 | 0-0.2 | 0-0.2 | 0-0.3 | 0-0.4 | 0-0.5 | 0-0.6 | - |