Product Introduction
High Fired Super Duty Fireclay Brick is a premium-grade refractory brick manufactured from selected high-purity fireclays and subjected to an elevated-temperature firing process that exceeds conventional Super Duty production standards. This specialized firing schedule promotes complete mullite crystallization and vitrification, resulting in a dense, low-porosity microstructure with exceptional mechanical strength and chemical resistance.
The product meets ASTM C27 classification for Super Duty fireclay brick and is widely recognized in the global refractory industry for its outstanding performance in demanding high-temperature environments.
Key Technical Parameters
The brick typically contains a minimum of 42 percent alumina (Al₂O₃) with iron oxide (Fe₂O₃) limited to 2.0 percent, ensuring good refractoriness and resistance to reducing atmospheres. Bulk density is at least 2.29 grams per cubic centimeter, while apparent porosity is controlled within the range of 17 to 19 percent. This low porosity is a direct result of the high firing temperature and significantly outperforms standard Super Duty bricks, which typically exhibit porosity above 22 percent.
Cold crushing strength reaches a minimum of 42 megapascals, providing reliable load-bearing capacity for heavy-duty applications. The pyrometric cone equivalent (PCE) value corresponds to Orton Cone 34, equivalent to approximately 1750 degrees Celsius, confirming its Super Duty classification. Permanent linear change after reheating at 1600 degrees Celsius is limited to minus 0.4 percent, demonstrating excellent volume stability during service.
Performance Advantages
The combination of high density and low porosity delivers superior resistance to slag penetration, alkali attack, and carbon monoxide disintegration. This makes High Fired Super Duty brick particularly suitable for environments where standard clay bricks would fail prematurely due to chemical corrosion or structural degradation.
The product also exhibits good thermal shock resistance and low creep under load, contributing to extended campaign life in cyclic or thermally fluctuating operations.
Typical Applications
High Fired Super Duty bricks are commonly installed in blast furnace bottoms and hot stove linings, glass tank regenerator lower checkers, cement preheating zones, carbon baking furnace flue walls, and various industrial boilers, stacks, and combustion chambers. They are also specified for charcoal furnaces, zinc galvanizing furnaces, and air heaters where a balance of cost, durability, and high-temperature performance is required.
Ordering Information
Standard brick dimensions and custom shapes can be supplied to meet specific furnace designs. For technical datasheets, pricing, and delivery lead times, please contact our sales team with your application details.
