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.
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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
|
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 |
