SK36 firebrick is a high-quality alumina refractory brick widely used in various high-temperature industrial furnaces. Manufactured by Xintai Refractory, this firebrick features stable performance, excellent resistance to thermal shock, and outstanding structural integrity under extreme heat.
With over 20 years of manufacturing experience, Xintai Refractory supplies SK36 firebricks at competitive factory prices. We offer standard sizes and custom shapes to meet the demanding needs of clients in metallurgy, ceramics, glass, and petrochemical industries.
Technical Specifications of SK36 Firebrick
| Item | SK36 Firebrick |
|---|---|
| Al₂O₃ (%) | ≥ 50–55 |
| Fe₂O₃ (%) | ≤ 2.5 |
| Refractoriness (SK Grade) | ≥ 36 |
| Refractoriness Under Load | ≥ 1450 °C (at 0.2 MPa) |
| Apparent Porosity (%) | ≤ 22 |
| Bulk Density (g/cm³) | ≥ 2.15 – 2.22 |
| Cold Crushing Strength (MPa) | ≥ 45 |
| Standard Size | 230 × 114 × 65 mm (or custom) |
| Sample | Free Sample Available Globally |
Key Features
Xintai’s SK36 bricks are carefully engineered for maximum performance in extreme conditions. Key advantages include:
- High Working Temperature: Resistant to deformation and spalling at elevated temperatures.
- Excellent Thermal Shock Resistance: Maintains structural integrity during repeated heating and cooling cycles.
- Good Acid Resistance: Performs well in chemically aggressive furnace environments.
- Accurate Dimensions: Precision pressing and inspection ensure tight tolerances and easy installation.
- Reliable Mechanical Strength: Cold crushing strength ≥ 45 MPa ensures long service life in industrial use.
- Strict Quality Control: Multiple testing stages, including bulk density, porosity, strength, and third-party inspection upon request.
Typical Applications
Xintai SK36 refractory bricks are ideal for furnace lining in a wide range of industries:
- Metallurgical Industry: Blast furnaces, electric arc furnaces, steel ladles, converter furnaces.
- Ceramics Industry: Tunnel kilns, chamber kilns, firing kilns for ceramic processing.
- Petrochemical Industry: Catalytic cracking units, petroleum refining furnaces, reformers.
- Glass Industry: Glass tank furnaces, melting chambers, regenerator walls.
- Power Industry: Incinerators, biomass furnaces, heat treatment plants.
Production Details of SK36 Firebrick
The SK36 firebrick is manufactured through a carefully controlled process to ensure consistent quality and high performance in high-temperature applications. It begins with the selection of premium-grade bauxite and other raw materials, which are crushed, ground, and thoroughly mixed. The mixture is then shaped using high-pressure molding equipment to form uniform bricks. After drying, the bricks are fired at high temperatures in a tunnel kiln to achieve excellent mechanical strength, low porosity, and precise dimensional accuracy. This strict production process ensures the SK36 firebricks meet the demands of various industrial furnaces and kilns.
Packing & Shipping Details
Packing: SK36 Firebricks are carefully packaged to ensure product integrity during transportation. Each brick is securely packed in wooden pallets or customized export cartons with plastic wrapping to prevent moisture, breakage, or contamination. Pallets are shrink-wrapped and reinforced with corner protectors for added safety during long-distance transit.
Shipping: We offer flexible shipping options including sea freight, air freight, and land transportation. Orders are typically dispatched within 7–15 working days after confirmation. All shipments comply with international export standards and include complete documentation, such as packing lists, invoices, and certificates of origin when required.
Frequently Asked Questions (FAQ)
Q1: What is the maximum service temperature of SK36 firebrick?
SK36 firebrick can typically withstand continuous use at temperatures up to 1350°C, with a classification temperature around 1450°C.
Q2: What is the alumina content in SK36 firebrick?
The alumina (Al₂O₃) content in SK36 firebrick is generally ≥ 50%, providing excellent thermal and chemical resistance.
Q3. Can SK36 firebricks withstand thermal shock?
Yes, SK36 bricks have good thermal shock resistance, making them suitable for environments with frequent temperature fluctuations.
Q4: Are custom sizes or shapes available for SK36 firebrick?
Yes, Xintai Refractory offers custom sizes and special-shaped bricks based on customer requirements.
Q5: What industries commonly use SK36 firebricks?
SK36 bricks are widely used in steelmaking, cement production, ceramics, petrochemical furnaces, and other high-temperature industrial processes.
