SK40 High Alumina Bricks are ultra-premium refractory products designed for the most extreme high-temperature industrial environments. Manufactured from carefully selected high-purity bauxite and advanced refining processes, these bricks contain ≥80% Al₂O₃, offering superior thermal stability, exceptional mechanical strength, and outstanding resistance to chemical corrosion and slag penetration.
Compared with standard SK38 and SK36 grades, SK40 bricks provide higher density, lower porosity, and longer service life, making them ideal for continuous operation in aggressive thermal conditions.
SK40 high alumina bricks are widely used in steel, glass, cement, ceramics, and non-ferrous metal industries where maximum reliability and furnace performance are required.
Physicochemical Parameters
| Items | SK-40 | SK-38 | SK-37 | SK-36 | SK-35 |
|---|---|---|---|---|---|
| AI₂O₃ ≥ , % | 80 | 75 | 65 | 55 | 48 |
| Bulk density, g/cm³ | 2.7-2.8 | 2.4-2.65 | 2.3-2.35 | 2.25-2.3 | 2.1-2.2 |
| Apparent Porosity, % | 20-22 | 20-22 | 23-24 | 23-24 | 23-26 |
| Cold crushing strength, Mpa | 65 | 55 | 50 | 45 | 40 |
| Refractoriness, ℃ | 1790 | 1790 | 1790 | 1770 | 1750 |
| Refractoriness under loading, 0.2MPa | 1600 | 1520 | 1480 | 1450 | 1420 |
| Permanent liner change of Reheating, % 1500℃, 2h |
-0.4~0.1 | -0.4~0.1 | -0.4~0.1 | -0.4~0.1 | -0.4~0.1 |
Product Features
- Ultra-High Temperature Resistance: SK40 bricks maintain structural stability in extreme environments up to nearly 1900°C, making them suitable for the most demanding furnace zones.
- Superior Density & Strength: With higher bulk density and compressive strength, SK40 provides excellent load-bearing capacity and resistance to mechanical wear.
- Excellent Slag & Chemical Resistance: High purity alumina structure significantly improves resistance to molten slag, metal penetration, and chemical corrosion.
- Low Porosity Structure: Reduced porosity minimizes infiltration of molten materials, extending service life and improving furnace efficiency.
- Outstanding Thermal Shock Resistance: Performs reliably under rapid temperature fluctuations, reducing cracking risk and downtime.
- Long Service Life: Designed for continuous industrial operation with minimal deformation and maintenance requirements.
Applications
SK40 high alumina refractory bricks are suitable for the most severe thermal equipment environments, including:
- Blast furnace hot blast stoves (high-temperature zones)
- Glass melting furnaces (working lining areas)
- Steel ladles and teeming ladles
- Electric arc furnace roofs and walls
- Cement rotary kiln transition and burning zones
- Non-ferrous metal smelting furnaces
- Petrochemical high-temperature cracking furnaces
- Heavy-duty industrial kiln linings
Customization Services
We provide flexible customization solutions for different furnace designs and engineering requirements:
- Sizes: Standard and non-standard dimensions available
- Shapes: Arch bricks, wedge bricks, checker bricks, special-shaped bricks
- Technical Adjustment: Alumina content and density can be optimized for specific working conditions
- OEM Service: Custom branding and packaging available
Packing and Shipping Details
SK40 High Alumina Bricks are securely packed to ensure safe global transportation.
- Packaging: Wooden pallets with plastic wrapping or export-standard packaging
- Shipping Methods: Sea freight, air freight, railway, or truck transportation available
- Delivery Time:
- Domestic Orders: 5–7 business days
- International Orders: 7–21 business days
- Tracking Service: Shipping tracking information provided after dispatch
- Customs Duties: Import taxes and customs fees are the responsibility of the customer
- Return Policy: Defective products can be reported within 7 days after receipt
About Xintai Refractory
Xintai Refractory is a professional manufacturer with over 20 years of experience in high-performance refractory materials. We specialize in producing refractory bricks, insulating bricks, castables, and monolithic refractory solutions for global high-temperature industries.
Our products are widely used in steel, cement, glass, ceramics, non-ferrous metals, petrochemical, and power industries. With advanced production technology, strict quality control, and strong customization capabilities, we provide reliable and long-lasting refractory solutions for industrial furnace systems worldwide.
