Performance of High Alumina Bricks in Continuous Casting Furnaces in Overseas Steel Plants

In the global steel industry, continuous casting furnaces operate under extremely demanding conditions, including high temperatures, strong alkali exposure, and severe slag corrosion. These harsh environments place strict requirements on the durability and stability of refractory linings. In recent years, many steel plants across Europe, Southeast Asia, and the Middle East have adopted high alumina bricks as their primary lining material during furnace upgrades, achieving consistently positive results.
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High alumina bricks, based on the Al₂O₃–SiO₂ system, offer excellent high-temperature strength, slag-resistance, and thermal shock stability. When used in continuous casting furnace linings, they effectively reduce spalling, deformation, and chemical erosion. Across multiple overseas projects, the service life of furnace linings increased from the typical 10–12 months to 18–24 months, significantly decreasing shutdown frequency and improving overall production stability.

The superior structural stability of high alumina bricks also helps maintain a more uniform temperature distribution in the furnace, thereby enhancing thermal efficiency and reducing energy consumption. Users have reported a heat-loss reduction of approximately 5%–8% after switching to high alumina brick linings, along with improved casting consistency and better product quality control.

Overall, the performance of high alumina bricks in continuous casting furnaces across global steel plants demonstrates their reliability under high-temperature, high-load operating conditions. They have become a preferred refractory solution for manufacturers seeking longer lining life, lower maintenance costs, and more stable furnace operation.