Generally, the alumina content of mullite bricks is 65% ~ 75%. The fire resistance is high, reaching above 1790 ℃. The starting temperature of load softening is 1600 ~ 1700 ℃. The normal temperature compressive strength is 70~260MPa. Good thermal shock resistance. There are two kinds of sintered mullite bricks and fused mullite bricks.
Application: mainly used for hot blast furnace top, blast furnace stack and bottom, glass furnace regenerator, ceramic sintering kiln, dead corner lining of petroleum cracking system, etc.