high-alumina brick

High-alumina brick is a type of refractory material, meaning it can withstand very high temperatures. These bricks are primarily composed of aluminum oxide (alumina), typically containing between 50% and 87.5% alumina. They are more robust than standard fireclay bricks, especially at high temperatures and in basic environments, offering better volume stability and abrasion resistance.1

High-alumina refractories are made from materials like bauxite and kaolinitic clays, which are processed to create a mixture of synthetic alumina and mullite. Due to their strength and stability at high temperatures, they are used in demanding applications such as lining blast furnaces, blast-furnace stoves, and liquid-steel ladles. Tabular alumina, a form of aluminum oxide heated to very high temperatures, is a key component in producing these high-quality refractories.12