High-Purity Corundum Brick from Xintai Refractory is an ultra-high performance refractory material produced from premium tabular alumina and fused alumina, with Al₂O₃ purity up to 99.5%. Designed for extreme thermal environments, it offers exceptional hardness, outstanding chemical stability, and strong resistance to high-temperature corrosion in both oxidizing and reducing atmospheres. Through 100% ultra-high temperature sintering, the bricks achieve complete densification, low porosity, and a stable crystal structure capable of withstanding severe thermal and mechanical stress.
Available in Grade HA-99 and HA-90, these bricks are ideal for critical industrial zones requiring maximum refractoriness, high load-bearing strength, and resistance to hydrogen attack. With decades of manufacturing experience, Xintai Refractory has strong expertise in producing complicated shapes and supports full customization for complex furnace linings, providing technical consultation, sample testing, and complete documentation tailored to B2B engineering and project needs.
Technical Specifications
| Item | HA-99 / GYZ-99 |
|---|---|
| Al₂O₃ Content, % | ≥ 99 |
| SiO₂ Content, % | ≤ 0.2 |
| Fe₂O₃ Content, % | ≤ 0.2 |
| Bulk Density, g/cm³ | ≥ 3.2 |
| Apparent Porosity, % | ≤ 19 |
| Cold Crushing Strength (CCS), MPa | ≥ 100 |
| Refractoriness Under Load (0.2 MPa), ℃ | ≥ 1700 |
Key Features
- Ultra-High Alumina Content: Al₂O₃ purity up to 99.5%, ensuring exceptional refractoriness and chemical stability at extreme temperatures.
- Superior High-Temperature Performance: Maintains mechanical strength and dimensional stability under continuous operation above 1700°C.
- Excellent Corrosion Resistance: Highly resistant to acidic and neutral slags, alkali vapors, molten metals, and high-temperature hydrogen attack.
- Low Porosity & High Density: Carefully controlled sintering process produces a dense microstructure with minimal open porosity, improving durability and service life.
- Outstanding Thermal Shock Resistance: Optimized grain structure reduces cracking and spalling under rapid temperature fluctuations.
- Strong Mechanical Strength: High cold crushing strength and excellent refractoriness under load (RUL), suitable for heavy load-bearing zones.
Typical Applications
High-Purity Corundum Bricks are designed for severe working environments across multiple industries:
Petrochemical & Fertilizer Industry
Secondary reformer linings
Gas generator linings
Catalyst bed supports
Hydrogen production furnaces
Steel & Metallurgy Industry
Reheating furnace hearths
Skid rails
Channel induction furnaces
Alloy steel melting furnaces
Tundish impact areas
Foundry Industry
High-temperature melting zones
Crucible furnace linings
Production Details
At Xintai Refractory, we follow strict quality control standards throughout the manufacturing process.
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: What is the difference between HA-99 and HA-90 grades?
HA-99 has higher alumina content and better high-temperature strength, making it suitable for more severe thermal environments. HA-90 offers a cost-effective alternative for slightly lower temperature applications.
Q2: Are these bricks suitable for hydrogen-rich environments?
Yes. High-Purity Corundum Bricks exhibit excellent resistance to hydrogen attack, making them suitable for reformers and hydrogen production units.
Q3. Can you manufacture complex shapes for special furnace designs?
Yes. We have strong know-how in producing complicated shapes according to drawings and 3D specifications.
Q4: Do you provide technical selection support?
Yes. Our engineering team can recommend suitable grades based on operating temperature, atmosphere, load conditions, and chemical exposure.
Q5: Can samples be supplied before bulk order?
Yes. Sample bricks can be provided for laboratory testing and performance verification.
