+86-15527482889
Hot Products
0102030405
High-Quality Silica Brick for Industrial Furnace - China Suppliers & Factory with Premium Acidic Refractory Material
Core Advantages
High Silicon Content & Premium Purity
SiO₂ content ranges from 94% to 96%, with extremely low harmful impurities (Fe₂O₃ ≤1.5%,). The high purity ensures excellent refractory performance and minimizes pollution to molten materials such as glass liquid.
Exceptional High-Temperature Resistance
Load softening temperature reaches 1640-1680℃, close to the melting point of tridymite and cristobalite. It can maintain structural integrity and no deformation under long-term high-temperature and high-load conditions.
Strong Acid Corrosion Resistance
As an acidic refractory material, it has strong resistance to acid slag and acidic gas erosion, and performs significantly better than clay bricks and ordinary high-alumina bricks in acidic working environments.
Stable High-Temperature Volume
After special firing process, the main mineral composition is tridymite and cristobalite. The residual expansion is small (0-0.2% at 1450℃×2h), which can make the masonry joints tight and ensure good airtightness.
Excellent Thermal Conductivity
Thermal conductivity is higher than that of clay bricks and high-alumina bricks, which is conducive to rapid heat storage and heat release of furnace equipment, improving energy utilization efficiency.
Product Parameters
| Item | Silica brick | |||
|---|---|---|---|---|
| BG-94 | BG-95 | BG-96A | BG-96B | |
| SiO₂ % | ≥94 | ≥95 | ≥96 | ≥96 |
| Fe₂O₃ % | ≤1.50 | ≤1.50 | ≤0.80 | ≤0.70 |
| % Apparent Porosity | ≤22 | ≤21 | ≤21 | ≤21 |
| g/cm³ Ture Density | ≤2.38 | ≤2.38 | ≤2.34 | ≤2.34 |
| MPa Cold Crushing Strength | ≥25 | ≥29 | ≥35 | ≥35 |
| ℃（0.2MPa,0.6%） Refractoriness Under Load | ≥1630 | ≥1650 | ≥1680 | ≥1680 |
Detailed Application Scenarios
1. Coke Oven Application
Silica brick is the core refractory material for modern large-scale coke ovens, which is used in key parts such as regenerator walls, slopes, carbonization chamber bottoms, furnace walls, and furnace tops. Coke ovens need to operate continuously at 950-1050℃ for dry distillation of coal. The high temperature resistance, stable volume, and good thermal conductivity of silica brick can increase the temperature of the combustion chamber, shorten the coking time, improve the production capacity of the coke oven, and extend the service life of the coke oven to more than 20 years. It is especially suitable for large coke ovens with carbonization chamber height above 6m.
2. Glass furnace Application
Silica brick is the most widely used and important brick type in float glass furnaces, mainly used in the melting section, working section roof swan, breast wall, front and rear end walls, regenerator top swan, and regenerator upper partition wall. The glass furnace gas temperature can reach above 1615℃, and the silica brick can withstand gravity, mechanical stress and high temperature load. It has slight erosion after absorbing a small amount of alkali components, which will not reduce the structural strength of the furnace top. At the same time, its low impurity content (Fe₂O₃ ≤0.8%) can avoid polluting the glass liquid and ensure the quality of glass products.
3. Hot Blast Furnace Application
Silica brick is used for masonry of high-temperature parts of blast furnace hot blast furnaces. Under the working conditions of long-term high temperature and high air pressure, it has stable volume and low creep rate, and can be used continuously for 1-2 blast furnace generations. Its excellent thermal conductivity is conducive to rapid heat storage and heat release, improving the temperature of hot air and the thermal efficiency of the blast furnace. It is suitable for the high-temperature bearing parts of hot blast furnaces and acidic blast furnace tops. We provide customized services for different furnace types and working conditions to meet the personalized needs of customers. With professional R&D team and after-sales service system, we are committed to providing customers with high-quality silica brick products and comprehensive technical support.
Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.
Frequently Asked Questions
What is the SiO₂ purity level of your silica bricks?
Our silica bricks feature high silicon content ranging from 94% to 96% with exceptionally low Fe₂O₃ impurities (≤1.5%, and as low as ≤0.70% for premium grades), ensuring optimal refractory performance.
What temperature can these silica bricks withstand under load?
The refractoriness under load (0.2MPa, 0.6%) ranges from ≥1630℃ up to ≥1680℃ depending on the grade (BG-94 to BG-96B), allowing them to maintain structural integrity under severe high-temperature conditions.
How do these bricks perform against chemical corrosion?
As acidic refractory materials, our silica bricks provide excellent resistance to acid slag and acidic gas erosion, significantly outperforming clay and ordinary high-alumina bricks in acidic environments.
Why are these silica bricks preferred for coke oven construction?
They offer high temperature resistance, stable volume, and superior thermal conductivity. This helps raise combustion temperatures, shorten coking times, and extend the service life of coke ovens to over 20 years.
How do your silica bricks ensure the quality of glass in float glass furnaces?
With low impurity content (Fe₂O₃ ≤0.80% for premium grades), our silica bricks resist chemical reactions with glass furnace gases and prevent pollution of the glass liquid, securing high product quality.