Mullite insulation brick is a high alumina refractory material with mullite (3Al2O3 2SiO2) as the main crystal phase. Generally, the alumina content is between 65 percent and 75 percent . In addition to mullite, the mineral composition contains a small amount of vitreous phase and cristobalite with a lower alumina content; a small amount of corundum is also contained in the higher alumina content.
High refractoriness, up to 1790 degree or more. Under load softening start temperature 1600 1700 degree . Normal temperature compressive strength 70 260MPa. Good thermal shock resistance. There are two types of sintered mullite bricks and fused mullite bricks. The crystallinity of fused mullite is larger than that of sintered mullite, and its thermal shock resistance is better than that of sintered products.
Εφαρμογές:
Mullite light bricks can be used as refractory linings or insulation layers for hot working layers. Mainly mullite Insulation Brick used for hot blast stove top, blast furnace shaft and bottom, glass melting furnace regenerator, ceramic sintering kiln, dead angle lining of petroleum cracking system, etc.
