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.
SiO2 ≥ 95%
Good heat stability at high temperature
Good thermal shock resistance
Low creep
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.
| 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 |
The application of modern hot blast stove technology is becoming more and more mature, and the average air temperature is as high as 1250~1300C, so the requirements for refractory materials in the furnace are more stringent, especially the high temperature areas such as the upper part of the regenerator and the combustion chamber are more likely to be damaged, which directly affects the hot blast stove. effect and lifespan.
For this reason, relevant customers and experts have put forward the target that the service life of the hot blast stove is two generations of blast furnaces. Therefore, choose a refractory material with good high-temperature thermal stability, strong resistance to high-temperature compression creep, high load softening temperature, and reasonable cost performance for high-temperature hot-blast stoves.
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