Silica Refractory Solutions Built for the Extreme
REBO silica bricks are engineered for the most demanding high-temperature environments. With SiO₂ content exceeding 94%, they deliver exceptional resistance to acidic atmospheres, outstanding load-bearing stability at elevated temperatures, and long service life across a range of industrial applications.
Silica Bricks for Glass Furnaces
Designed to withstand the intense, continuous heat of glass melting furnaces, our silica bricks maintain structural integrity at temperatures up to 1700 °C while resisting corrosion from molten glass and acidic flue gases. They are widely used in the crown, sidewalls, and port necks of melting tanks, as well as the regenerator checker chambers, where stable volume and resistance to glassmelt vapors are critical.
Silica Bricks for Coke Ovens
Optimized for the thermal cycling and mechanical stress of coke oven operation, these furnace refractory bricks offer superior volume stability and airtightness, ensuring efficient coking and extended furnace campaigns. Key application areas include the heating walls, oven roof, and combustion chambers, where precise dimensions and tight joints are essential to prevent gas leakage and maintain thermal efficiency across the entire battery.
Silica Bricks for Hot Blast Stoves
Built for the repeated heating and cooling cycles of hot blast stove service, our silica bricks provide reliable performance at high dome temperatures, supporting consistent blast furnace productivity. They are primarily used in the dome, upper combustion chamber, and the upper section of the checker chamber the zones subjected to the highest temperatures where high refractoriness under load and minimal creep are indispensable.
Standard Silica Refractory Brick Specifications
| Item | GZ-94 | GZ-96 | |
|---|---|---|---|
| SiO2, % | ≥ | 94 | 96 |
| Fe2O3, % | ≤ | 1.4 | 1.0 |
| Apparent Porosity, % | ≤ | 22 | 22 |
| Bulk Density, g/cm³ | ≤ | 2.35 | 2.34 |
| Cold Crushing Strength, MPa | ≥ | 30 | 40 |
| 0.2MPa Refractoriness Under Load, ℃ | ≥ | 1650 | 1670 |
Different Types of Silica Firebricks for Your Furnace
Standard Silica Refractory Brick
Lightweight Silica Brick
Silicon Carbide Brick
Aluminum-Silicon Carbide Brick
Si3N4 bonded SiC Brick
Fused Silica Brick
Silica Bricks Properties
Reaches 1560–1670°C, resisting deformation under load.
Irreversible Thermal Expansion
Resist cracking and spalling under repeated heating and cooling cycles.
Good Acid Slag Resistance
Resists acidic slags (SiO₂, FeO) effectively.
High SiO₂ Purity
SiO₂ content 94–96%; Al₂O₃ strictly limited.
Typically 1.8–1.95 g/cm³.
Controlled Fe₂O₃ Content
Restricted to prevent contamination in glass furnaces.
Poor Alkaline Slag Resistance
Degrades when exposed to CaO, MgO, or alkalis.
Poor Thermal Shock Resistance
Prone to cracking under rapid temperature.
Various Shapes of Silicon Bricks for High-temp Furnaces
| Category | Main Shapes | Typical Features & Applications |
|---|---|---|
| General Standard Types | Straight Shape / Standard Brick: 230×114×65 mm | Used for building flat walls or furnace crowns. This type has the largest consumption volume. |
| Furnace-Specific Types | Silica Bricks for Glass Furnaces | Includes large arch/wedge bricks, cast shape bricks, throat bricks, etc. |
| Silica Bricks for Coke Ovens | Includes door frame bricks, peeper brick, checker bricks for regenerators, and other complex shapes. | |
| Silica Bricks for Hot Blast Stoves | Includes radial wedge bricks for the dome, special-shaped bricks for the wall, etc. | |
| Custom Special Types | Special-shaped Bricks | Features recessed corners, grooves, or arcs. Used for special structural connections. |
| Extra-special-shaped Bricks | Very complex shapes. May include multiple recessed corners or holes. Used for arch corners, openings, and other critical areas. |
From Raw Material to Proven Performance
Every silica brick REBO Refractory produce begins with carefully selected high-purity quartzite, processed through precision batching, high-pressure forming, and controlled high-temperature firing at up to 1450 °C. Strict quality inspection at every stage from raw material analysis to dimensional tolerance checks and load-bearing tests. This ensures each brick meets the demands of your specific application before it ever leaves our facility.
Our 60,000 m² manufacturing base houses eight tunnel kilns and four friction press lines, with an annual output exceeding 80,000 metric tons. Advanced thermal analysis equipment allows us to monitor cristobalite and tridymite phase conversion in real time, giving us precise control over the properties that matter most: volume stability, creep resistance, and refractoriness under load. The direct factory silica bricks price is great for you.
This manufacturing discipline translates directly into field performance. Our silica bricks have been successfully installed in over 300 projects across 30 countries, including the crown and sidewalls of a 600 t/d float glass furnace in Germany, the full heating wall lining of a 65-oven coke battery in India, and the dome and upper combustion chamber of hot blast stoves supporting a 4,500 m³ blast furnace in China. Campaign lives of 10–15 years in glass furnace service and 25+ years in coke oven applications stand as a testament to the consistency of our process and the reliability of our product.
Whether you are lining a new furnace or planning a major repair, our engineering team works with you from specification through installation backed by a manufacturing process refined over more than 30 years of refractory production.
How Silica Brick Compares Acid Resistance & Service Temperature
| Brick type | Resistant to | Not resistant to | Service temp. |
|---|---|---|---|
| Silica brick | Most inorganic acids | HF · hot H₃PO₄ · alkalis | RT 1700 °C |
| SiC brick | Weak & organic acids | Strong oxidizing acids · alkalis | RT 1600 °C |
| Si₃N₄-bonded SiC brick | Acids + thermal shock | Strong oxidizing acids · strong alkalis | RT 1650 °C |
| Acid-resistant brick | Nearly all inorganic acids | HF · hot strong alkalis | RT 300 °C |
| Carbon brick | Broadest acid coverage | Oxidizing acids · oxidizing atmosphere | RT 2000 °C |
