Grade-3 high alumina brick

Grade-3 high alumina brick is a type of neutral refractory material with an alumina (Al₂O₃) content of over 55%. It is made by shaping and calcining bauxite or other raw materials with high alumina content. These bricks feature high thermal stability, a refractoriness above 1770°C, and good slag resistance. They are mainly used for lining blast furnaces, hot blast stoves, electric furnace roofs, air furnaces, reverberatory furnaces, and rotary kilns.