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
Mullite bricks are widely used in glass furnaces,hot blast stove and etc
Advantage
lLow thermal expansion rate
lStrong resistance to corrosion by metallurgical slag and various glass liquids
lHigh temperature wear resistance
lHigh temperature thermal stability, anti-corrosion of glass liquid
lLong 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 |
