Seeking reliable refractory solutions for high-temperature industrial environments? SK34 firebricks are the trusted choice for metallurgy, glass manufacturing, ceramics, and beyond. Engineered with precise chemical composition and superior thermal performance, these bricks deliver exceptional durability and efficiency, becoming a cornerstone for high-performance kilns and furnaces globally.
1. Core Characteristics of SK34 Firebricks
SK34 firebricks stand out for their balanced thermal stability, mechanical strength, and corrosion resistance, rooted in advanced manufacturing and calibrated material blends. Key features include:
- Exceptional High-Temp Tolerance: Rated SK34 (1710–1750°C refractoriness) with a 1350°C refractoriness under load (RUL) at 0.2 MPa, they perform reliably in medium-to-high temperature operations without softening or deformation, critical for consistent heat processing.
- Optimized Chemical Makeup: Containing 34–42% alumina (Al₂O₃) and <2.5% ferric oxide (Fe₂O₃), they resist acid slag erosion and minimize impurity-related damage, extending service life in harsh industrial settings.
- Strong & Dense Structure: With a bulk density of 2.15–2.20 g/cm³ and cold crushing strength ≥30 MPa, they withstand abrasion and impact. Low porosity (19–23%) reduces heat loss and prevents molten material penetration, preserving structural integrity.
- Excellent Thermal Shock Stability: Boasting 0.6% linear expansion at 1000°C and ±0.3% permanent linear change at 1350°C (2 hours), they endure rapid temperature fluctuations without cracking or spalling, cutting maintenance and downtime.
- Flexible Sizing: Available in standard sizes (230×115×25 mm, 230×115×75 mm) and custom shapes (arch, corbel bricks), they fit both standard and specialized heat equipment, enhancing application versatility.
2. Key Industrial Applications
SK34 firebricks` balanced performance makes them indispensable across critical sectors:
Metallurgy: Lining electric arc furnaces, induction furnaces, ladles, and reheating furnaces in steel/iron production, they resist molten metal and slag erosion, ensuring stable smelting processes.
Glass & Ceramics: Ideal for glass melting furnaces and ceramic kilns, their high temp resistance and thermal stability maintain uniform heating, critical for product quality in glass forming and ceramic sintering.
Chemical & Thermal Power: Used in chemical reactor linings, waste incinerators, and boiler combustion chambers, they withstand corrosive gases and high temps, ensuring safe, efficient operation.
Other Sectors: Also applied in foundry cupolas, brick kilns, and industrial heating systems, adapting to diverse high-temp industrial needs.
Choose SK34 firebricks for proven performance in extreme heat. Our products meet global quality standards, with customizable solutions to match your specific requirements. Contact us today to learn how SK34 firebricks can enhance your equipment`s efficiency and longevity.
Post time: Jan-26-2026
