High Refractoriness Low Residual Quartz Silica Bricks for Hot Blast Stove
Advantages:
- Raw materials: crystalline silica
- High purity, good thermal conductivity
- High refractoriness under load
- High tridymite content
Areas of Application:
- Hot blast stove, hot blast furnace, blast furnace in iron steel industry
- Glass furnace
- Carbon furnace
- Coke oven, oven batteries
Technical Index:
| Item | Silica Brick for Hot Blast Stove |
| Wall bricks , Dome Bricks | Checker Brick |
| SiO2 % | ≥95 | ≥95 |
| Al2O3 % | ≤1.0 | ≤1.0 |
| Fe2O3 % | ≤1.0 | ≤1.0 |
| Apparent Porosity % | ≤22 | ≤24 |
| True Density g/cm3 | ≤2.33 | ≤2.33 |
| Cold Crushing Strength MPa | ≥40 | ≥35 |
| Refractoriness Under Load (0.2MPa) ℃ | ≥1650 | ≥1650 |
| Residual Quartz % | ≤1.0 | ≤1.0 |
| Creep Rate 0.2MPa (1550℃*50h) % | ≤0.6 | ≤0.6 |
| Permanent Linear Change ( 1450℃*2h) % | ≤0.2 | ≤0.2 |
| Thermal Expansion Coefficient (1000℃ ) % | ≤1.26 | ≤1.26 |
Manufacturing Process Flow:
First, qualified raw materials enter to our raw materials warehouse
Second, all materials including fine powders, aggregates, binding agent are batched according to the technical agreement.
Third, finished raw materials is shaped by 630 tons pressure machine or 2500 tons automatic hydraulic pressure machine.
Forth, green bricks is dried in the dry kilns between 40℃ and 120 ℃, and then sintering in high temperature according to the firing curve.
Last, check the quality of finished refractory bricks and qualified products are packed as request.
