Silica Brick Specifications
2024-10-14 09:20:22
Silica brick is a refractory material made of silica as the main raw material and sintered at high temperature. It is widely used in high-temperature industrial furnaces, glass melting furnaces, ceramic kilns and other fields. The specifications and performance of silica bricks directly affect their effects in practical applications. The following are some of the main specifications and performance indicators of silica bricks.
1. Chemical composition
The main component of silica bricks is silicon dioxide (SiO₂), which usually contains more than 93%. The remaining components may include impurities such as bauxite (Al₂O₃), iron oxide (Fe₂O₃), calcium oxide (CaO), etc. The specific chemical composition can be adjusted according to different uses.
2. Physical properties
Density: The density of silica bricks is generally between 2.3-2.6 g/cm³.
Water absorption: The water absorption of silica bricks is usually less than 5%, which means that it has good anti-permeability.
Thermal conductivity: The thermal conductivity of silica bricks is about 1.2-1.5 W/(m·K), which allows it to effectively retain heat at high temperatures.
3. Refractoriness
The refractoriness of silica bricks is usually between 1580-1730℃, and the specific refractoriness will vary depending on the composition and production process of the bricks.
4. Compressive strength
At room temperature, the compressive strength of silica bricks is generally between 30-70 MPa. Refractory performance and compressive strength are important indicators for evaluating their performance.
5. Thermal expansion coefficient
The thermal expansion coefficient of silica bricks is relatively low, usually 5-7×10⁻⁶/K, which makes it less likely to deform at high temperatures and prolongs its service life.
6. Operating temperature
Silica bricks are suitable for various high-temperature environments and are usually used in the range of 1200-1600℃. According to the specific working conditions and atmosphere, choosing the right type of silica brick is the key to ensuring stable production.
7. Specifications and dimensions
Common specifications and dimensions of silica bricks include:
Standard brick: 230mm × 114mm × 65mm
Half brick: 230mm × 114mm × 32mm
Special specifications can be customized according to customer needs.
8. Application fields
Silica bricks are widely used in the following fields:
Blast furnace: The lining of the blast furnace used for steel smelting has good fire resistance and erosion resistance.
Glass melting furnace: At high temperatures, silica bricks can effectively isolate heat and ensure the temperature inside the melting furnace is stable.
Ceramic kiln: As an important material in the ceramic firing process, silica bricks can withstand high temperatures and chemical corrosion.
Conclusion
Silica bricks are a refractory material with superior performance. Their specifications and performance determine their application effect in high temperature environments. According to specific usage requirements, choosing the appropriate silica brick specifications and types will help improve production efficiency and extend the service life of equipment.
1. Chemical composition
The main component of silica bricks is silicon dioxide (SiO₂), which usually contains more than 93%. The remaining components may include impurities such as bauxite (Al₂O₃), iron oxide (Fe₂O₃), calcium oxide (CaO), etc. The specific chemical composition can be adjusted according to different uses.
2. Physical properties
Density: The density of silica bricks is generally between 2.3-2.6 g/cm³.
Water absorption: The water absorption of silica bricks is usually less than 5%, which means that it has good anti-permeability.
Thermal conductivity: The thermal conductivity of silica bricks is about 1.2-1.5 W/(m·K), which allows it to effectively retain heat at high temperatures.
3. Refractoriness
The refractoriness of silica bricks is usually between 1580-1730℃, and the specific refractoriness will vary depending on the composition and production process of the bricks.
4. Compressive strength
At room temperature, the compressive strength of silica bricks is generally between 30-70 MPa. Refractory performance and compressive strength are important indicators for evaluating their performance.
5. Thermal expansion coefficient
The thermal expansion coefficient of silica bricks is relatively low, usually 5-7×10⁻⁶/K, which makes it less likely to deform at high temperatures and prolongs its service life.
6. Operating temperature
Silica bricks are suitable for various high-temperature environments and are usually used in the range of 1200-1600℃. According to the specific working conditions and atmosphere, choosing the right type of silica brick is the key to ensuring stable production.
7. Specifications and dimensions
Common specifications and dimensions of silica bricks include:
Standard brick: 230mm × 114mm × 65mm
Half brick: 230mm × 114mm × 32mm
Special specifications can be customized according to customer needs.
8. Application fields
Silica bricks are widely used in the following fields:
Blast furnace: The lining of the blast furnace used for steel smelting has good fire resistance and erosion resistance.
Glass melting furnace: At high temperatures, silica bricks can effectively isolate heat and ensure the temperature inside the melting furnace is stable.
Ceramic kiln: As an important material in the ceramic firing process, silica bricks can withstand high temperatures and chemical corrosion.
Conclusion
Silica bricks are a refractory material with superior performance. Their specifications and performance determine their application effect in high temperature environments. According to specific usage requirements, choosing the appropriate silica brick specifications and types will help improve production efficiency and extend the service life of equipment.
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