High alumina bricks with Al₂O₃ content of 55%–80%, engineered for demanding metallurgical and industrial furnace applications. Delivers exceptional refractoriness above 1770°C, superior slag resistance, and outstanding mechanical strength for extended service life in harsh operating conditions.
High alumina bricks are the workhorse refractory material for high-temperature industrial furnaces across the steel, cement, glass, and petrochemical industries. Manufactured from premium-grade bauxite and calcined alumina raw materials, these bricks achieve alumina contents ranging from 55% to over 80%, delivering refractoriness consistently above 1770°C. This exceptional thermal performance makes them the preferred choice for furnace zones where temperatures regularly exceed 1400°C and where resistance to both acidic and basic slag attack is essential.
In steelmaking applications, high alumina bricks serve as the primary lining material for blast furnace hot blast stoves, where they withstand cyclic heating to 1300–1450°C while maintaining structural integrity over campaign periods of 15–20 years. The bricks’ high alumina content forms a stable corundum (α-Al₂O₃) phase at operating temperatures, which provides superior resistance to the silicate-based slags encountered in iron and steel production. Their low apparent porosity, typically below 22%, limits slag penetration and protects the brick structure from chemical degradation.
Quality control is paramount in refractory brick production. Each batch undergoes comprehensive testing including X-ray fluorescence (XRF) analysis for chemical composition verification, mercury intrusion porosimetry for pore structure characterization, and hot modulus of rupture testing at elevated temperatures. Our high alumina bricks are manufactured using controlled pressing at 150–300 MPa followed by high-temperature sintering at 1550–1650°C, ensuring consistent density, strength, and mineralogical phase development. The result is a refractory lining product that delivers predictable performance, extended campaign life, and reduced total cost of ownership for furnace operators.
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