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Lightweight Mullite Refractory Brick
1.Minimum bulk density is 0.5
2.Low thermal conductivity
3.Perfect Energy-saving
Lightweight Mullite Refractory Brick
De
Hh lightweight mullite refractory bricks are made from good quality and superpure raw materials,with strictly classified fillings according to their grades.These fillings can form a uniform pore structure after burnt during the process of manufacture.Each grade of products has unique design to meet different thermal,physical and chomical demands.
Features:
1.Low thermal conductivity
2.Low heat capacity
3.Low content of impurities
4.High hot compressive strength
5.Accurate size
6.The bricks can be processed into special shapes
Application:
The refractory linings of hot surfaces or backing heat-insulating layers of other refractory materials.The refractory linings or heat-insulating materials of the industrial furnaces in the petroleum or chemical industries,such as ,ethylene pyrolysis furnaces,tubular furnaces,reforming furnaces of synthetic ammonia,gas generators and high-temperature shuttle kilns,etc.
Main Physical and Chemical Properties:
|
Item |
Hh23 |
Hh26B |
Hh26A |
Hh28 |
Hh30 |
Hh32 |
|
Max. Service temperature (°c) |
1250 |
1300 |
1400 |
1500 |
1550 |
1600 |
|
Bulk Density (kg/m3) |
600 |
800 |
800 |
900 |
1000 |
1100 |
|
Reheat Linear Change%(°c×4h) |
0.4(1230) |
0.4(1300) |
0.5(1400) |
0.7(1500) |
0.7(1550) |
0.7(1600) |
|
Cold Compressive Strength (Mpa) |
1.1 |
1.8 |
1.9 |
2.5 |
2.8 |
3 |
|
Cold Modulus of Rupture (Mpa) |
0.8 |
1.2 |
1.2 |
1.4 |
1.6 |
1.8 |
|
Thermal Conductivity 350°c (w/mk) |
0.15 |
0.26 |
0.26 |
0.33 |
0.38 |
0.43 |
|
Thermal Expansion(1000°c) |
0.46 |
0.46 |
0.47 |
0.48 |
0.48 |
0.49 |
|
AL2O3(%) |
40 |
48 |
56 |
65 |
72 |
78 |
|
Fe2O3(%) |
1 |
0.85 |
0.8 |
0.8 |
0.7 |
0.5 |
The above data is the companys measured,on average,the catual production can be adjusted according to user needs.
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