Mullite brick:
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:
l Mullite bricks are widely used in glass furnaces,hot blast stove and etc
Advantage:
l Low thermal expansion rate
l Strong resistance to corrosion by metallurgical slag and various glass liquids
l High temperature wear resistance
l High temperature thermal stability, anti-corrosion of glass liquid
l Long service lifetime
Technical Data:
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 |