Corundum mullite bricks are high-performance refractory materials widely used in the glass industry, especially in regenerators of glass furnaces. Made from high-purity corundum and synthetic mullite through advanced sintering technology, these bricks combine excellent high-temperature resistance with strong thermal shock stability. They are designed to withstand the demanding thermal cycling and chemical attack conditions inside glass furnace regenerators, ensuring long service life and consistent furnace efficiency.
Technical Specifications
| Property | Unit | Value |
|---|---|---|
| Al₂O₃ Content | % | ≥ 80 – 90 |
| Apparent Porosity | % | ≤ 18 |
| Bulk Density | g/cm³ | 2.8 – 3.1 |
| Cold Crushing Strength | MPa | ≥ 70 – 90 |
| Refractoriness Under Load | °C | ≥ 1700 |
| Thermal Shock Resistance | Cycles | ≥ 20 |
Key Features
Excellent resistance to high temperatures and thermal shock
High mechanical strength and wear resistance
Strong resistance against alkali and slag erosion
Low creep rate at high temperatures
Stable volume and long service life in hot blast stove operation
Manufactured with strict quality control for consistent performance
Typical Applications
Hot blast stove lining for steel plants
Regenerator chamber of blast furnaces
Transition zones and combustion chambers
Glass and ceramic kilns requiring high-temperature refractories
Non-ferrous metallurgy furnaces exposed to aggressive environments
Production Details
Corundum mullite bricks are manufactured from carefully selected raw materials including high-purity alumina and synthetic mullite. The production process involves:
Raw Material Preparation – Precision mixing of alumina, mullite, and binding agents.
Forming – Press forming or vibration forming to ensure uniform density.
High-Temperature Sintering – Firing at over 1700°C to develop a stable corundum-mullite crystal structure.
Quality Inspection – Each batch undergoes strict testing for density, porosity, strength, and dimensional accuracy.
Packing and Shipping Details
Packing:
Bricks are packed on fumigated wooden pallets, secured with plastic films and steel straps.
Customized packaging available upon request.
Shipping:
Suitable for sea or land transportation.
Standard delivery time: 15–25 days after order confirmation.
International shipping with proper documentation support (CO, Form E, etc.).
Frequently Asked Questions (FAQ)
Q1: What is the maximum working temperature of corundum mullite bricks?
They can be used safely at temperatures up to 1750 °C.
Q2: Can you provide customized sizes?
Yes, we support custom dimensions and shapes based on the customer’s furnace design.
Q3. How do corundum mullite bricks compare to high alumina bricks?
Corundum mullite bricks have higher strength, better thermal shock resistance, and longer service life, making them more suitable for hot blast stoves.
Q4: How long is the service life of corundum mullite bricks in a hot blast stove?
Under normal operating conditions, the service life can range from 3 to 5 years, depending on furnace operation, maintenance practices, and working atmosphere.
Q5: Do you provide installation guidance?
Yes, our technical team can provide on-site or remote installation guidance to ensure proper lining performance.
