Utilizzati principalmente come materiali strutturali per forni a coke, forni per vetro, forni per la produzione di acciaio acido e altre apparecchiature termiche.
Refractory silica bricks are acidic refractory materials mainly composed of tridymite, cristobalite, a small amount of residual quartz and glass phase. The silica content is above 94%, the true density is 2.35g/cm3, and it has the ability to resist acid slag erosion. It has high high temperature strength. The load softening temperature is 1620～1670℃. It will not deform after long-term use at high temperature. The thermal shock stability is low (heat exchange in water is 1~4 times).
| Articolo/Grado | GZ-94 | |
|---|---|---|
| ω (SiO2)/% | μ0 | ≥94 |
| σ | 1.0 | |
| ω (Fe2O3)/% | μ0 | ≤1.4 |
| σ | 0.3 | |
| Porosità apparente/% | μ0 | ≤24 |
| σ | 1.5 | |
| Densità reale (g/cm³) | μ0 | ≤2.35 |
| σ | 0.1 | |
| Resistenza alla frantumazione a freddo/MPa | μ0 | ≥30 |
| σ | 10 | |
| Xmin | 20 | |
| 0,2MPa Rifrangenza Sottocarico/℃ | μ0 | ≥1650 |
| σ | 13 | |
1.High load softening temperature
2.Good resistance to acidic slag
3.High temperature volume stability
4.Excellent Corrosion Resistance
Silica bricks are widely used in coke ovens, glass furnaces and steel-making furnaces due to their high temperature resistance and acid resistance. They can withstand high temperatures and acidic environments.