Silicon bricks for hot blast furnaces are used for masonry of high temperature parts of blast furnace hot blast furnaces with scaled quartz as the main crystalline phase of silica refractory products.
Product characteristics of silica bricks for hot blast furnace.
- Under long-term high temperature and high load conditions, the volume is stable and the high temperature creep rate is low, and it can be used continuously for 1 or 2 blast furnaces.
- Good thermal shock resistance above 600 degrees, adapt to the change of hot blast furnace temperature and keep the masonry intact.
- chemical resistance is better than clay bricks and general high alumina bricks.
- The thermal conductivity of silica bricks for hot blast furnace is greater than clay bricks and high alumina bricks, which is good for storing and releasing heat in a short time.
| Item | Vault and furnace wall tiles | checker bricks |
| SiO2 % ≥ | 95 | 95 |
| Al2O3 % ≤ | 1.0 | 1.0 |
| Fe2O3 % ≤ | 1.2 | 1.2 |
| Apparent porosity % ≤ | 22 | 24 |
| Normal temperature compressive strength MPa ≥ | 40 | 30 |
| 0.2MPa Load softening temperature℃ ≥ | 1650 | 1650 |
| True Density g/cm3 ≥ | 2.33 | 2.34 |
| 0.2MPCreep rate % 1550℃ 0-50h ≤ | 0.8 | 0.8 |
| Coefficient of thermal expansion 1000℃ % ≤ | 1.26 | 1.26 |
