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 bricks are neutral refractory materials with an alumina (Al₂O₃) content of over 48%. They are made from raw materials with a high alumina content, such as clay or other materials, through molding and calcination. These bricks exhibit excellent thermal stability and can withstand temperatures above 1770°C. They also have good slag resistance.
Characters of High Alumina Brick:
•🔥High Refractoriness (≥1750°C)
•🛡️Excellent Resistance to Chemical Attack & Slag Penetration
•💪Good Thermal Shock Resistance & Dimensional Stability
•🌡️High Cold Crushing Strength (up to 90 MPa)
•📉Low Creep Rate at High Temperatures
•🏭OEM/ODM Custom Sizes & Shapes Available
Typical Applications of High Alumina Bricks:
•🔩Steel & Metallurgy: Blast furnace linings, hot blast stoves, steel ladle linings
•🏗️Cement Industry: Preheaters, rotary kiln linings, clinker cooler walls
•🔬Non-Ferrous Metallurgy: Copper smelters, aluminum refining units
•🔥Ceramic & Glass Kilns: Chamber walls, checker bricks, burner blocks
•♻️Waste Incineration Plants: High wear & corrosion zones
Parameters of High Alumina Brick:
| 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 |
-0.4 |
-0.4 |
-0.4 |
-0.4 |
|
Apparent porosity (%) |
22 | ≤23 |
≤23 |
≤22 |
≤22 |
|
Cold crushing strength (Mpa) |
55 |
≥50 |
≥45 |
≥40 |
≥35 |
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.
