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
High Refractoriness – Stable performance under extreme temperatures up to 1700°C.
Excellent Thermal Shock Resistance – Capable of withstanding rapid heating and cooling cycles in regenerators.
Strong Chemical Resistance – Resistant to alkali vapors and glass melt corrosion.
Low Porosity & High Density – Enhances structural strength and reduces penetration of aggressive furnace gases.
Long Service Life – Maintains integrity under continuous furnace operations, reducing maintenance costs.
Typical Applications
Regenerator checkers in glass melting furnaces.
Sidewalls, crowns, and other high-temperature zones exposed to severe thermal stress.
High-temperature structural components requiring both refractoriness and thermal shock resistance.
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 securely packed on fumigated wooden pallets with protective wrapping to prevent breakage during transit.
Shipping: Global delivery available by sea, land, or air freight depending on customer needs. Standard lead times typically range from 15–30 days after order confirmation. Customized packaging and urgent shipments can be arranged upon request.
Frequently Asked Questions (FAQ)
Q1: Are corundum mullite bricks suitable for direct contact with glass melt?
Yes, they are resistant to glass corrosion and alkali attack, making them suitable for regenerator applications and other furnace parts.
Q2: How do corundum mullite bricks compare to silica bricks in glass furnaces?
Unlike silica bricks, corundum mullite bricks offer higher refractoriness, better thermal shock resistance, and longer service life, especially under severe operating conditions.
Q3. Can the brick size be customized?
Yes, we provide both standard and customized sizes according to furnace design and client requirements.
Q4: What is the typical service life in a glass furnace regenerator?
With proper installation and operating conditions, service life can reach several years, reducing downtime and maintenance costs.
Q5: Do you provide installation guidance?
Yes, our technical team can provide on-site or remote installation guidance to ensure proper lining performance.
