Standard Low Density Mullite Brick

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Product Description:

Specifications

1.Al2O3 38-45
2.Excellent thermal stability
3.Excellent insulating performance

                  Brand

Quality

JM23

JM26

JM28

JM30

Classification Temperature (°C)

1260

1430

1540

1650

Bulk Density (g/cm3)

0.55

0.78

0.88

1.03

Cold Crushing Strength (Mpa)

1.2

1.6

2.1

2.5

Modulus of Rupture (Mpa)

0.9

1.4

1.6

2.1

Reheating Linear Change (%) CT-30°CX 8H

1230°C

-0.5

1400°C

-0.5

1510°C

-0.5

1620°C

-0.9

Thermal Expansion1000°C(%)

0.5

0.7

0.8

0.9

Thermal conductivity(W/m.k)

400°C

0.14

0.27

0.32

0.41

600°C

0.16

0.29

0.34

0.43

800°C

0.18

0.31

0.36

0.44

1000°C

0.20

0.33

0.38

0.45

Al2O3 (%)

37

58

67

73

Fe2O3 (%)

1.0

1.0

1.0

0.5

Tolerance          

>250mm  ±1.0mm  <250mm  ±0.5mm

Corner edge damage: a+b+c< 30mm


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Q:does the furnace wall use refractory bricks to keep the heat? Or use the insulation material to keep heat ?
generally is refractory insulation materials, casting materials.
Q:What raw materials are used for making refractory bricks
That is silicon aluminum refractory brick/, it can be divided into five types:thermal insulation refractory brick, alkaline series refractory brick, refractory brick containing zirconium, carbonaceous refractory brick/. Refractory bricks are divided according to the ingredient of refractory. Refractory bricks are generally made from refractory clay (kaolin) or other refractory materials.
Q:Is there any special requirements for the building blocks of the smoke and gas wells, how about the refractory bricks?
There are no special requirements. Not necessarily need refractory bricks, red bricks are ok. The building size of the flue is according to the smoke exhaust rate.
Q:What are the main components of refractory bricks
There are several kinds of refractory brick, clay brick, carborundum brick, chromium carbon.
Q:What is the color of the refractory brick to repair the same color as the 1400
Smash the same brick into fine powder
Q:Is refractory brick afraid of rain?
High alumina clay is not afraid of rain, but covering is better, magnesium carbon refractory brick had better not be rained.
Q:what effect does big mortar joints of the boiler refractory brick have on the boiler?
The ventilation leakage。 Now the larger boilers are generally used refractory pouring material one-time pouring, the arch is easy to collapse . 2, shrinkage and expansion of brick will make the bricks fall. 1, do not use the refractory brick. too large seam will effect the tightness of furnace wall , and the water wall is easy to form dew and be corroded and to leak smoke.
Q:Whether the fire bricks are needed to be poured before construction?
It should be properly watered, according to its water absorption rate: Need to soak and dry in the shade. There is no need to do like the ordinary red brick
Q:Expansion ratio of light corundum fireproofing brick
And then the appropriate drying, the using temperature 1500~1700 degrees of light corundum brick, the porosity is 70% to 80% Now, use foaming method to produce light corundum brick, 3g/, shaped idiosome with mould dry for 4 days in 60 degree to 70 degree oast, it will demoulding, foaming method and evaporating method produce light corundum brick, the thermal conductivity is 0. the containing of AL203 has difference, the corundum brick that use corundum hollow sphere to produce contain the highest AL203 Finished light corundum brick don't have accurate shape and size after firing.8 1, so products need mechanical or manual cutting after the kiln, finally, firing in 1300 degree and 1550 degree, basically still meters with water forming, just add to burn: 50~60h, because its production methods and the introduction of additives are different, the total sintering time.17W/, light corundum fireproofing brick can be made into density is 0, withstand voltage strength is 4MPa, the containing of A1203 is no more than 99%.
Q:What's the reason of cracks in refractory bricks?
This is inorganic nonmetallic material

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