The High Alumina Composite Silicon Carbide Brick is a specially engineered refractory material designed to withstand the harsh working conditions inside steel ladles. By combining the high-temperature resistance of alumina with the excellent thermal conductivity and wear resistance of silicon carbide (SiC), this brick offers superior structural integrity and thermal shock resistance.
Technical Specifications
| Property | Value |
|---|---|
| Al₂O₃ Content | ≥ 65% |
| SiC Content | 20–30% |
| Bulk Density | 2.60–2.75 g/cm³ |
| Apparent Porosity | ≤ 18% |
| Cold Crushing Strength | ≥ 60 MPa |
| Refractoriness Under Load (0.2 MPa) | ≥ 1650℃ |
| Thermal Shock Resistance (1100℃, water quenching) | ≥ 25 cycles |
| Thermal Conductivity (1000℃) | 6.5–8.0 W/m·K |
Key Features
High Thermal Stability: Maintains strength and structure at temperatures exceeding 1600°C.
Enhanced Erosion Resistance: Silicon carbide content significantly improves resistance to molten metal and slag corrosion.
Excellent Thermal Shock Resistance: Ideal for rapid heating and cooling cycles inside the ladle.
High Mechanical Strength: Withstands mechanical impact and long-term use under severe ladle conditions.
Long Service Life: Reduced frequency of brick replacement improves overall ladle efficiency and productivity.
Typical Applications
Working lining of steel ladles and refining ladles in both primary and secondary metallurgy processes.
Ideal for use in slag lines and impact zones, where high wear and chemical attack are expected.
Suitable for both basic oxygen furnaces and electric arc furnace steelmaking processes.
Production Details
The High Alumina Composite Silicon Carbide Brick is manufactured through a high-temperature sintering process that integrates selected high-purity alumina, premium silicon carbide, and special binders. The raw materials are proportioned precisely, mixed uniformly, shaped by hydraulic pressing, and then fired at temperatures exceeding 1400°C to ensure optimal density and bonding. This advanced production method ensures the brick offers exceptional resistance to slag erosion, thermal shock, and mechanical wear, making it ideal for harsh furnace environments and long service life requirements.
Packing and Shipping Details
Packing:
Bricks are packed in fumigated wooden crates with foam protection layers to prevent breakage. Each crate is securely strapped and labeled with product information.Shipping:
Available for global delivery via sea, land, or air freight. We work with certified logistics partners to ensure timely and safe delivery.
Frequently Asked Questions (FAQ)
Q1: What is the main application of High Alumina Composite Silicon Carbide Bricks?
These bricks are mainly used in high-temperature industrial furnaces, such as blast furnaces, hot blast stoves, waste incinerators, and gasifiers, where high resistance to wear, slag erosion, and thermal shock is essential.
Q2: What are the key benefits of using this type of brick?
The brick offers excellent thermal stability, strong resistance to chemical attack, high mechanical strength, and superior service life, especially in high-wear zones.
Q3. What is the typical service temperature range?
These bricks can typically operate in environments up to 1500°C, depending on the furnace design and working atmosphere.
Q4: Can the brick be customized according to specific requirements?
Yes, we offer customization of size, shape, and composition based on customer specifications and application needs.
Q5: How does this brick compare to traditional alumina bricks?
Mainly used in the iron and steel industry, particularly in torpedo tanks, ladles, mixers, and other molten metal handling equipment.
