Introduction to High-Temperature Stability With Zero Expansion
Silica Bricks High Quality Furnace Refractory Brick For Glass Kiln
Repair
Zero Expansion Silica Bricks are a special type of silica
refractory material with an extremely low thermal expansion
coefficient, making them almost dimensionally stable even under
high temperatures. This characteristic makes them particularly
suitable for repair and maintenance work in high-temperature
environments like glass kilns. Here are the key features and
applications of zero expansion silica bricks in the context of
glass kiln repair:
Key Features of Zero Expansion Silica Bricks for Glass Kiln Repair
- Low Thermal Expansion Coefficient: These bricks exhibit very low
thermal expansion at high temperatures, maintaining dimensional
stability and preventing cracks and damage due to thermal
expansion.
- Excellent High-Temperature Performance: They can withstand
prolonged exposure to high temperatures, maintaining their
integrity and performance.
- Superior Thermal Shock Resistance: The bricks can endure rapid
temperature changes, reducing the risk of damage due to thermal
shock.
- Chemical Stability: They are resistant to acid and alkali
corrosion, offering strong chemical resistance.
- High Mechanical Strength: They can withstand the mechanical
stresses typical in the high-temperature environments of glass
kilns.
Applications in Glass Kiln Repair
Zero expansion silica bricks are primarily used in the following
areas during glass kiln repair:
- Crown (Kiln Roof): The crown of a glass kiln operates in a
high-temperature environment. Using zero expansion silica bricks
helps prevent cracking caused by thermal expansion.
- Sidewalls: The sidewalls must withstand high temperatures and
mechanical stress. The high refractoriness and low expansion of
these bricks ensure the stability and durability of the sidewalls.
- Around Burners: The area around burners experiences significant
temperature fluctuations. Zero expansion silica bricks' thermal
shock resistance helps withstand these fluctuations effectively.
- Hot Repairs: During operational periods, hot repairs can be
performed using zero expansion silica bricks without waiting for
the kiln to cool down, significantly improving repair efficiency
and production continuity.
Advantages of Zero Expansion Silica Bricks For Glass Kiln
Repair
- Reduced Downtime: Their low expansion and high thermal shock
resistance allow for hot repairs, minimizing downtime and
increasing production efficiency.
- Extended Kiln Life: Using high-performance zero expansion silica
bricks can significantly extend the overall service life of the
glass kiln, reducing maintenance costs.
- Improved Product Quality: Stable kiln structures and high-quality
refractory materials contribute to the production of higher-quality
glass products.
Product Specifications of Zero Expansion Silica Bricks
Product Specifications of Zero Expansion Silica Bricks |
Item | index |
FS-97 | PS98 | FS-99 |
w(SiO₂)/% | μ0 | ≥ | 97.0 | 98.0 | 98.5 |
o | | 1.0 |
w(Al2O3)/% | μ0 | ≤ | 0.50 | 0.30 | 0.20 |
o | | 0.10 |
w(Fe2O3)/% | μ0 | ≤ | 0.30 | 0.20 | 0.10 |
o | | 0.05 |
Bulk Density/(g/cm³) | μ0 | ≥ | 1.75 | 1.80 | 1.85 |
o | | 0.02 |
Apparent Porosity/% | μ0 | ≤ | 22.0 | 20.0 | 18.0 |
o | | 1.5 |
Cold Crushing Strength/MPa | μ0 | ≥ | 25 | 30 | 35 |
o | | 10 | | |
0.2MPa refractoriness under load (RUL)(Tao)/°C | μ0 | ≥ | 1500 | 1600 | 1650 |
o | | 15 |
Linear Expansion Rate(1000°C)/% | | ≤ | 0.20 |
o | | 0.10 |
thermal shock resistance(1100°C,water-cooled)/time | | ≥ | 30 | 30 | 30 |