Mullite Brick Mullite Brick

Mullite Brick

Al2o3: ≥72%
Fe2o3: ≤0.8%
Bulk density : ≥2.55g/cm3
Apparent porosity : ≤17%
Cold crushing strength: ≥80Mpa
Thermal shock resistance: Excellent
Description

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 16001700℃. It has the good thermal shock resistance with cold crushing strength of 70260MPa. 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

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

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