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High-Temperature Sillimanite Brick from China Suppliers - Reliable Factory for Glass Furnaces
Features
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1. High Refractoriness: Sillimanite bricks can withstand temperatures up to 1650°C (3000°F).
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2. Thermal Shock Resistance: They are resistant to rapid temperature changes, which prevents cracking and spalling.
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3. Chemical Stability: These bricks are chemically stable and resistant to slag, acidic, and basic environments.
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4. Mechanical Strength: They have good mechanical strength even at high temperatures.
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5. Low Thermal Expansion: This reduces the risk of structural damage during heating and cooling cycles.
Composition
60-65%
Alumina (Al2O3)
Approximately chemical composition
30-35%
Silica (SiO2)
Approximately chemical composition
Minor
Other Minerals
Quantities depend on formulation and process
Applications
1. Glass Industry
For furnace linings, particularly in the superstructure and crown areas of glass-melting furnaces.
2. Metallurgical Industry
In the construction of high-temperature furnaces and kilns used for metal production and refining.
3. Ceramics Industry
In kilns and other high-temperature processing equipment.
4. Petrochemical Industry
For lining reactors and other high-temperature vessels.
5. Cement Industry
In the kilns and preheater systems where high thermal resistance is required.
Manufacturing
The manufacturing process of sillimanite bricks involves mining the sillimanite mineral, crushing and grinding it to the desired particle size, mixing it with binders and other additives, shaping the mixture into bricks, and firing them in a kiln at high temperatures.
Advantages
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Longevity due to high resistance to wear and tear.
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Energy efficiency due to low thermal conductivity.
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Reduced maintenance costs due to durability.
Sillimanite bricks are an essential material in industries requiring materials that can withstand extreme conditions, ensuring both operational efficiency and safety.
Frequently Asked Questions
What is the maximum temperature sillimanite bricks can withstand?
Sillimanite bricks have high refractoriness and can withstand extreme temperatures up to 1650°C (3000°F) without structural failure.
What is the chemical composition of sillimanite bricks?
They are primarily composed of Alumina (Al2O3) at approximately 60-65% and Silica (SiO2) at approximately 30-35%, along with minor quantities of other minerals.
Why do sillimanite bricks have high thermal shock resistance?
Sillimanite bricks have a low thermal expansion coefficient, which minimizes internal stress and prevents cracking or spalling during rapid heating and cooling cycles.
Where are sillimanite bricks used?
They are widely used in high-temperature environments across the glass industry (furnace linings), metallurgy, ceramics (kilns), petrochemical industry (reactors), and cement industry.
What are the economic benefits of using sillimanite bricks?
Due to their high wear resistance, low thermal conductivity, and durability, they offer long-term energy efficiency, reduced maintenance costs, and prolonged operational longevity.