Curved Refractory Firebrick is a specially shaped semicircular brick designed for high-temperature industrial furnaces and boilers. Made from high-alumina bauxite or fireclay, these bricks provide exceptional fire resistance, thermal shock stability, and mechanical strength. Curved bricks are ideal for circular hearths, rotary kilns, steelmaking furnaces, and ceramic kiln linings, where the unique shape ensures a perfect fit and durable furnace structure. Xintai Refractory offers multiple grades and custom sizes to meet specific operational requirements, all manufactured to ensure high performance at competitive prices.
Technical Specifications
| Item | LZ-80 | LZ-75 | LZ-70 | LZ-65 | LZ-55 |
|---|---|---|---|---|---|
| Al₂O₃ % ≥ | 80 | 75 | 70 | 65 | 55 |
| Apparent Porosity % | 22–23 | 24–26 | 24–26 | 26–28 | 26–28 |
| Bulk Density g/cm³ ≥ | 2.7 | 2.5 | 2.4 | 2.3 | 2.2 |
| Load Softening Temp ℃ (0.2 MPa) | 1530 | 1520 | 1510 | 1500 | 1450 |
| Permanent Linear Change 1450℃*2h % | -0.4~0.1 | -0.4~0.1 | -0.4~0.1 | -0.4~0.1 | -0.4~0.1 |
| Cold Crushing Strength MPa | 70–60 | 60–50 | 55–45 | 50–40 | 45–40 |
Key Features
- High Refractoriness: Can withstand temperatures up to 1530°C
- Thermal Shock Resistant: Maintains structural integrity under rapid heating and cooling
- Mechanical Strength: Cold crushing strength 40–70 MPa, grade-dependent
- Corrosion Resistance: Resistant to molten slag and reactive gases
- Spalling Resistance: Prevents surface peeling and wear under high-temperature operation
- Curved Design: Perfect for circular furnace hearths or curved linings, reducing joint erosion
- Custom Sizes: Available to match your furnace requirements
Typical Applications
Curved Refractory Firebricks are widely used in:
- Industrial furnace tops, circular hearths, and curved linings
- Rotary kilns, electric furnaces, and blast furnaces
- Ceramic kilns and tubular furnaces
- High-temperature boilers and chemical reactors
These bricks help maintain furnace structural integrity, prevent erosion from molten materials, and extend the lifespan of refractory linings.
Production Details
Xintai Curved Firebricks are manufactured from high-purity raw materials using advanced mixing, molding, and firing technologies. Each brick undergoes strict quality control to ensure uniform density, optimal strength, and excellent thermal performance. Impurities are minimized, resulting in durable, long-lasting bricks capable of withstanding harsh industrial conditions. Custom grades and sizes are available to suit specific operational and furnace design needs.
Packing and Shipping Details
- Packaging: Packed on sturdy wooden pallets with protective wrapping
- Shipping Time: 7–15 working days after order confirmation
- Storage: Keep in a dry, ventilated area to avoid moisture absorption
- Customization: Available for different curved shapes and dimensions
Frequently Asked Questions (FAQ)
Q1: What is the difference between standard refractory bricks and curved refractory firebricks?
Standard refractory bricks are rectangular and used for general furnace linings. Curved refractory firebricks are semicircular, designed for circular hearths and curved structures, providing tighter joints, reduced erosion, and better structural support for high-temperature furnaces.
Q2: Can I order custom sizes for curved bricks?
Yes, Xintai offers custom shapes and sizes to fit specific furnace designs and operational requirements.
Q3. What materials are used to manufacture curved refractory firebricks?
They are primarily made from high-alumina bauxite, offering superior refractoriness, mechanical strength, and thermal shock resistance. Fireclay grades are also available for lower-temperature applications.
Q4: What temperature can curved refractory firebricks withstand?
Depending on the grade, they can withstand temperatures ranging from 1420°C to 1530°C, making them suitable for high-temperature furnaces, kilns, and boilers.
Q5: How do curved refractory bricks improve furnace efficiency?
Their semicircular design ensures tight joints and reduces molten material erosion, extends lining lifespan, and allows for thinner linings, which increases effective furnace volume.
Q6: Are curved refractory firebricks suitable for all types of industrial furnaces?
They are ideal for circular hearths, rotary kilns, electric furnaces, blast furnaces, and other high-temperature applications. For extremely specific conditions, consult with Xintai technical support for the appropriate grade and shape.
