Silica Brick Introduction
High quality silica a brick is made of silicon raw material, the content of SiO2 is above 91%. And the content of Al2O3 is below 1.0%. Our factory produces various kinds of refractory products. The products can be made according with the customers' requirement.
Silica Brick Physical and Chemical Index
Different technical data in different applications
A. General silica brick:used for coke oven, glass smelting kiln furnace,steel furnace etc .
Item | GZ-96 | GZ-95 | GZ-94 | GZ-93 |
SiO2 % ≥ | 96 | 95 | 94 | 93 |
Fe2O3 % ≤ | 1.0 | 1.2 | 1.4 | 1.6 |
Refractoriness °C ≥ | 1710 | 1710 | 1710 | 1690 |
Apparent porosity % ≤ | 22 | 22 | 23 | 25 |
Cold crushing strength Mpa ≥ | 29.4 | 29.4 | 24.5 | 19.6 |
Refractoriness under load, 0.2MPa, °C ≥ | 1660 | 1650 | 1640 | 1620 |
True density g/cm3 ≤ | 2.34 | 2.37 | 2.38 | 2.39 |
B. Silica brick for Hot-blast stove
Item | Dome wall brick | Checker brick |
SiO2 % ≥ | 95 | 95 |
Cold crushing strength Mpa ≥ | 35 | 30 |
Apparent porosity % ≤ | 22 | 23 |
Creep rate(0.2MPa,1550°C,50h)% ≤ | 0.8 | 0.8 |
True density g/cm3 ≤ | 2.35 | 2.35 |
Thermal expansion(1000 °C)% ≤ | 1.26 | 1.26 |
C.Silica brick for coke oven
Item | Furnace bottom,Furnace wall | Other |
SiO2 % ≥ | 94 | 94 |
Cold crushing strength Mpa ≥ | 30 | 25 |
Apparent porosity % ≤ | 22 | 24 |
Refractoriness under load, 0.2MPa, °C≥ | 1650(Cementation silica 1620) | 1650(Cementation silica 1620) |
Permanent linear Change 1450 °C,2h ≤ | 0-+0.2 | 0-+0.2 |
True density g/cm3 ≤ | 2.34 | 2.35 |
Thermal expansion(1000 °C)% ≤ | 1.28 | 1.30 |
Silica Brick Features
1) Silicon oxide is above 91%.
2) Good acid erosion resistance.
3) High softening point with temperature.
4) No shrink in burn repeatedly.
5) Temperature of refractoriness under load is above 1650º C
Stable Capability, High Quality, Excellent Service, Competitive price is the most important advantage of our products.
Application Of Silica Brick
They are widely used for hot blast furnace, coke oven, and glass furnace. The products can be made according to customers' requirement.
