Al2o3: ≥72% Fe2o3: ≤0.8% Bulk density : ≥2.55g/cm3 Apparent porosity : ≤17% Cold crushing strength: ≥80Mpa Thermal shock resistance: Excellent Mullite bricks are high-alumina refractories with mullite (3Al2O3·2SiO2) as the main crystal phase. Generally, the alumina content is between 70% and 80%. Mullite Refractory bricks have high refractoriness, which can reach above 1790℃. The starting temperature of load softening is 1600～1700℃. It has the good thermal shock resistance with cold crushing strength of 70～260MPa. There are two types of mullite refractories: sintered mullite bricks and fused mullite bricks. If the Al2O3 content in refractory brick is more than 80%, we call it as corundum mullite brick. If there is ZrO2 in the brick, we call it as Zircon Mullite Brick. As a professional mullite bricks manufacturer, we have exported different mullite refractory bricks to more than 30 countries. Please kindly read the following more information and make Inquiry.

Scope of application

• Mullite bricks are widely used in glass furnaces,hot blast stove and etc

Advantage

• Low thermal expansion rate • Strong resistance to corrosion by metallurgical slag and various glass liquids • High temperature wear resistance • High temperature thermal stability, anti-corrosion of glass liquid • Long service lifetime

Items	Mullite brick M72	Mullite brick M78	Mullite brick M80
Al2o3  %	≥72	≥78	≥80
Fe2o3   %	≤0.8	≤1.0	≤0.5
Bulk density g/cm3	≥2.55	≥2.65	≥2.9
Apparent porosity %	≤17	≤18	≤19
Cold crushing strength   mpa	≥80	≥80	5
Thermal shock resistance	Excellent	Excellent	Very good
Softening under load	---	≤1700	1700
Thermal expansion %	--	0.6	0.6