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Tin Bath Roof Block
Items |
Sillimanite roof block |
Mullite roof block |
Al2O3 (%) |
≥55 |
≥60 |
Fe2O3 (%) |
≤0.8 |
≤0.6 |
R2O (%) |
≤0.8 |
≤0.8 |
Bulk Density/(g/cm3) |
≥2.30 |
≥2.5 |
Porosity / (%) |
≤20 |
≤20 |
Cold Crushing strength/(MPa) |
≥50 |
≥60 |
Refractoriness / (℃) |
≥1760 |
≥1790 |
Refractoriness under load at 0.2Mpa (℃) |
1450 |
1500 |
Thermal shock resistance in water at 1000℃ (cycle) |
≥25 |
≥25 |