SK35 Firebrick is a premium-grade alumina-silica refractory brick manufactured by Xintai Refractory. It is designed for high-temperature industrial applications where excellent thermal stability, mechanical strength, and resistance to slag and thermal shock are critical.
With an Al₂O₃ content ≥ 35%, the SK35 firebrick offers superior refractoriness and consistent performance in thermal environments up to 1350ºC. It is engineered to meet the stringent demands of kilns, furnaces, incinerators, and other high-temperature processing equipment.
Technical Specifications of SK35 Firebrick
| Parameter | Specification |
|---|---|
| Brand | Xintai |
| Alumina Content (Al₂O₃) | ≥ 35% |
| Bulk Density | 2.05 – 2.15 g/cm³ |
| Refractoriness | ≥ 1770°C |
| Refractoriness Under Load (RUL) | ≥ 1350°C |
| Cold Crushing Strength (CCS) | ≥ 50 MPa |
| Apparent Porosity | ≤ 22% |
| Permanent Linear Change (PLC) | ± 0.3% (at 1400°C × 2h) |
| Working Temperature | 1250 – 1350°C |
| Moisture Content | ≤ 1.0% |
| Organic Content | Low; organic binder fully burns off during initial firing |
| Standard Size | 230 × 114 × 65 mm |
| Color | Yellowish Brown |
Key Features
High Alumina Content: Ensures strong resistance to chemical corrosion, slag erosion, and thermal stress.
Excellent Mechanical Strength: Cold Crushing Strength (CCS) ≥ 50 MPa, ensuring high load-bearing capacity under operational stress.
Dimensional Stability: Low linear shrinkage during prolonged exposure to heat, maintaining brick alignment and tight structure.
Thermal Shock Resistance: Performs reliably under repeated heating and cooling cycles, extending service life.
Eco-Friendly Composition: Manufactured with low organic binders that completely burn off during the first firing, minimizing emissions.
Typical Applications
SK35 firebricks are widely used across various industries, including:
Cement rotary kilns
Steel ladles & furnaces
Glass melting tanks
Petrochemical heaters
Lime kilns
Ceramic sintering kilns
Incinerators and biomass furnaces
They are ideal for both lining and insulation in environments requiring stability and performance at medium-high temperatures.
Production Details of SK35 Firebrick
The SK35 firebrick is produced using carefully selected high-quality raw materials, primarily bauxite and clay, which are crushed, mixed, and formed under high pressure. The shaped bricks are then dried and fired at elevated temperatures in advanced kilns to achieve excellent mechanical strength, thermal stability, and low porosity. This precise manufacturing process ensures that SK35 firebricks deliver reliable performance in high-temperature industrial applications such as kilns, furnaces, and boilers.
Packing and Shipping Details
Packing Method:
Strong wooden pallets with shrink-wrap and plastic straps.
Optional fumigation for export compliance.Shipping Options:
Available via sea freight, air cargo, or express courier.
Support for EXW, FOB, CIF, and DDP terms.
Frequently Asked Questions (FAQ)
Q1: What is the maximum operating temperature for SK35 firebrick?
SK35 firebrick is suitable for continuous use at temperatures up to approximately 1350°C.
Q2: What is the alumina content of SK35 firebrick?
The alumina (Al₂O₃) content in SK35 firebrick is typically ≥ 35%, which provides good thermal resistance and mechanical strength.
Q3. What industries commonly use SK35 firebrick?
SK35 firebrick is widely used in industries such as steelmaking, cement manufacturing, ceramics, petrochemical processing, and other high-temperature furnace applications.
Q4: Can SK35 firebrick withstand thermal shock?
Yes, SK35 firebrick has good thermal shock resistance, making it suitable for environments with frequent temperature changes.
Q5: Are custom sizes or shapes available for SK35 firebrick?
Yes, custom sizes and special shapes can be manufactured according to client specifications.
