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| Refractory material-Chamotte |
| Chamotte |
| Chemical | chamotte-45 |
| Al2O3 | 44-46 |
| SiO2 | 45-50 |
| Fe2O3 | 1.0-1.5 |
| TiO2 | ≤1.0 |
| CaO | ≤0.2 |
| MgO | ≤0.1 |
| K2O | ≤0.2 |
| Na2O | ≤0.1 |
| bulk density(g/cm3) | 2.6 |
| Refractoriness(℃) | ≥1770 |
| Mullite phase | ≥65% |