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Silica checkers are widely used in hot blast stove of blast furnace in steel company, which have the characteristics of silicon oxide content and low melting index, and it is a acid refractory materials.
Silica checkers are widely used in hot blast stove of blast furnace in steel company, which have the characteristics of silicon oxide content and low melting index, and it is a acid refractory materials.
| Silica series | Silica dense brick | Silica checker brick | Silica brick for glass furnace | |
| Item | Unit | K | RG-95 | BG-95 |
| SiO2 | % | ≥95 | ≥95 | ≥95 |
| Al2O3 | % | ≤1.0 | ≤1.0 | ≤1.0 |
| Fe2O3 | % | ≤0.5 | ≤0.5 | ≤0.5 |
| Bulk density | g/cm3 | ≥1.80 | ≥1.78 | ≥1.85 |
| True density | g/cm3 | 2.34 | 2.34 | 2.34 |
| Apparent porosity | % | ≤22 | ≤22 | ≤20 |
| Cold crushing strength | Mpa | ≥30 | ≥30 | ≥30 |
| Residual quarze, | ℃ | ≤1.0 | ≤1.0 | ≤1.0 |
| Refractoriness under load | ≥1650 | ≥1650 | ≥1650 | |
