Zhengzhou Zhongkeda Refractory Materials Co., Ltd
Corundum Mullite Brick
Corundum Mullite Bricks - High-Performance Refractory Solutions for Demanding Industrial Applications
Corundum-Mullite Brick is a high-quality shaped refractory material made primarily from corundum (α-Al₂O₃) and mullite (3Al₂O₃·2SiO₂), with mullite and corundum as the main crystalline phases. It exhibits excellent high-temperature stability, thermal shock resistance, and chemical corrosion resistance, making it widely used in metallurgy, building materials, and chemical industries for high-temperature equipment.
Characters of Corundum Mullite Brick:
•🔥High-Temperature Performance: Can be used continuously at 1600–1800°C, maintaining high strength at elevated temperatures.
•⚡Thermal Shock Resistance: The low thermal expansion coefficient (from the mullite phase) helps reduce cracks caused by sudden temperature changes.
•🛡️Corrosion Resistance: Strong resistance to acidic slag, alkaline slag, and molten metal erosion.
•📏Low Creep Rate: Maintains shape at high temperatures, preventing deformation and extending furnace service life.
Main Application of Corundum-Mullite Brick:
•🏭Steel Industry: Lining of reheating furnaces, walking beam furnaces
•🧪Ceramic Industry: Kiln furniture, tunnel kilns
•🔥Glass Industry: Glass tank regenerators, feeders
• 🏗 Petrochemical Industry: Cracking furnaces, reformer linings
• ⚙ Power Plants: Waste incinerators, boiler linings
Parameters of Corundum-Mullite Brick:
Item
GMZ-88
GMZ-85
GMZ-80
GMZ-75
Al₂O₃, （%）≥
88
85
80
75
Fe₂O₃, （%）≤
0.8
1.0
1.0
1.2
Apparent Porosity, （％）≤
15(17)
16(18)
18(20)
18(20)
Bulk Density, （g/cm³）≥
3
2.85
2.75
2.6
Cold Crushing Strength, （Mpa）≥
120
100
100
80
0.2Mpa Refractoriness Under Load （T0.6 ℃）≥
1700
1680
1650
1650
Permanent Linear Change On Reheating,%(1500℃*2h)
-0.1⁓0.1
-0.1⁓0.1
-0.2⁓0.2
-0.2⁓0.2
FAQ:
A: Corundum Mullite Bricks offer superior high-temperature resistance, better thermal shock resistance, lower creep rates at high temperatures, and outstanding corrosion resistance to slags and chemicals.
Q: In which industries are Corundum Mullite Bricks commonly used?
A: They are widely used in steel reheating furnaces, ceramic kilns, glass furnaces, petrochemical cracking furnaces, waste incinerators, and other high-temperature industrial kilns.
Q: Can you customize the size and shape of Corundum Mullite Bricks?
A: Yes, we offer customized shapes, dimensions, and compositions based on your furnace design or specific application needs.
Q: What is the maximum service temperature of Corundum Mullite Bricks?
A: Our Corundum Mullite Bricks can operate steadily at temperatures up to 1800°C, depending on the specific grade.
Q: How is the thermal shock resistance of Corundum Mullite Bricks?
A: They exhibit excellent thermal shock resistance, capable of withstanding rapid temperature changes, making them ideal for demanding thermal cycling conditions.
Q: Do you provide technical support for material selection and installation?
A: Yes, our experienced technical team can provide guidance on material selection, lining design, and installation methods to help optimize your furnace performance.
Q: What is your typical lead time for Corundum Mullite Brick orders?
A: Lead time usually ranges from 15 to 30 days, depending on order quantity and customization requirements.
Q: What certifications do your Corundum Mullite Bricks meet?
A: Our products are manufactured under strict quality systems and can be supplied with ISO certifications, chemical analysis reports, and third-party inspection certificates if needed.
Q: How are the bricks packaged for international shipment?
A: Bricks are securely packed on fumigated wooden pallets with waterproof wrapping to ensure safe handling and delivery.
