Zhengzhou Zhongkeda Refractory Materials Co., Ltd
High Alumina Brick
High Alumina Bricks – Premium Refractory Bricks for High-Temperature Industries
High Strength | Thermal Stability | Customized Solutions
High alumina brick is a high-performance refractory material with excellent thermal stability, high strength and strong resistance to high temperatures. It is widely used in steel, cement, glass and ceramic industries for furnace lining applications.
Characters of High Alumina Brick:
• High Temperature Resistance
Excellent performance under extreme heat conditions.
• Strong Mechanical Strength
High compressive strength and durability.
• Good Thermal Shock Resistance
Stable under rapid temperature changes.
• Long Service Life
Reduces maintenance and replacement cost.
Types of High Alumina Bricks
By Alumina Content
Grade
Al₂O₃ Content
Characteristics
Typical Application
Low Duty
40%–50%
Basic thermal resistance, cost-effective
General furnace lining
Medium Duty
50%–60%
Balanced strength and insulation
Industrial kilns
High Duty
60%–70%
Good thermal stability and wear resistance
Steel & cement industry
Super Duty
70%–80%
High performance, excellent durability
High-temperature furnaces
Very High
80%–85%+
Extreme temperature resistance
Special industrial environments
By Service Temperature
Temperature
Performance
Application
1300°C
Medium duty use
General kilns
1400°C
Stable performance
Cement & ceramic kilns
1500°C
High temperature resistance
Steel & glass furnaces
1600°C+
Extreme conditions
Special furnaces
By Shape
Type
Description
Application
Standard Brick
230×114×65 mm
General lining
Arch Brick
Curved shape
Kiln roof
Wedge Brick
Tapered shape
Circular kiln
Special Shape
Customized
According to drawings
Technical Date
| Item | LZ-80 | LZ-75 |
LZ-65 |
LZ-55 | LZ-48 |
|
Al₂O₃(%) |
≥80 | ≥75 |
≥65 |
≥55 |
≥48 |
|
Refractoriness (°C ) |
≥1790 |
≥1790 |
≥1790 |
≥1790 |
≥1790 |
|
Bulk Density (g/cm³) |
2.65 |
2.5 | 2.45 | 2.4 | 2.3 |
|
Softening Temperature Under Load (°C ) |
≥1530 |
≥1520 |
≥1500 |
≥1470 |
≥1420 |
|
Reheating Linear changes Rate (%)/1500℃*2h |
0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
|
Reheating Linear changes Rate (%)/1450℃*2h |
-0.4 |
-0. |
-0.4 |
-0.4 |
-0.4 |
|
Apparent porosity (%) |
≤22 | ≤23 |
≤23 |
≤22 |
≤22 |
|
Cold crushing strength (Mpa) |
≥55 |
≥50 |
≥45 |
≥40 |
≥35 |
Widely used in blast furnaces, hot blast stoves, cement rotary kilns, glass furnaces, tunnel kilns and carbon baking furnaces
Customization
• Custom Sizes
Available in standard and customized dimensions.
• Special Shapes
Supports arch bricks, wedge bricks and other shapes.
• OEM Service
Custom branding and packaging available.
• Technical Support
Professional guidance for furnace application design.
Need High Alumina Brick for Your Project?
We provide professional refractory solutions, technical support and competitive pricing for global industrial applications.
FAQ:
Q: What are high alumina bricks made of?
A:High alumina bricks are primarily made of bauxite, alumina, and other alumino-silicate raw materials. The Al₂O₃ content typically ranges from 48% to over 90%, depending on the grade.
Q:What is the maximum working temperature of high alumina bricks?
A:Standard high alumina bricks can withstand temperatures up to 1,750°C (3,182°F), depending on alumina content and application. Higher alumina grades offer superior thermal resistance.
Q:Do you offer custom sizes or shapes?
A:Yes, we manufacture both standard sizes (230x114x65mm, etc.) and custom-shaped high alumina bricks based on drawings or specific requirements.
Q:Do you offer custom sizes or shapes?
A:Yes, we manufacture both standard sizes (230x114x65mm, etc.) and custom-shaped high alumina bricks based on drawings or specific requirements.
Q:What is your MOQ and delivery time for export orders?
A:•MOQ: 10 tons
•Lead Time: 7–15 working days depending on quantity and customization
•Shipping: We support FOB, CIF, EXW, and door-to-door services
Q:Can your high alumina bricks be used for direct contact with molten metal?
A:Yes, high-purity high alumina bricks are suitable for applications involving direct contact with molten steel or aluminum, especially in ladles, runners, and spouts.
Q:How are the bricks packaged for export?
A:We use:
•Standard export wooden pallets
•Shrink-wrapped and strapped
•Option for fumigated pallets or steel pallets as per customer requirements
Q:Can I order a sample before bulk purchase?
A:Absolutely. We offer free or paid samples depending on the product type and shipping region. Sample preparation typically takes 3–5 days.
