INSULATING FIREBRICK
Insulating Firebrick is made from high-purity refractory powder and organic fillers which burn out during manufacture to give a uniform and controlled pore sture. The brick is compressed in vacuum and sintered under high temperature. Insulating Firebrick is widely used as hot face refractory lining or back-up insulation in various kinds of industrial furnaces.
Features
Excellent thermal shock resistance
Accurate and customized dimension
High crushing strength
Low thermal conductivity
Low heat storage
Typical Applications
Metallurgy industry
Petrochemical industry
Ceramics industry
Aluminum industry
Glass industry
Specification
|
Description
|
GRADE 23 BRICK
|
GRADE 26 BRICK
|
GRADE 28 BRICK
|
GRADE 30 BRICK
|
|
Classification Temperature (℃ )
|
1300
|
1400
|
1500
|
1550
|
|
Chemical Composition (%)
|
||||
|
Al2O3
|
40
|
56
|
67
|
73
|
|
SiO2
|
51
|
41
|
30
|
24
|
|
Fe2O3
|
≤1.0
|
≤0.8
|
≤0.7
|
≤0.6
|
|
Density (kg/m³)
|
600
|
800
|
900
|
1000
|
|
Modulus of Rupture (MPa)
|
0.9
|
1.5
|
1.8
|
2.0
|
|
Cold Crushing Strength (MPa)
|
1.2
|
2.4
|
2.6
|
3.0
|
|
Permanent Linear Change (%)
|
1230℃ x 24h ≤0.3
|
1400℃ x 24h ≤0.6
|
1510℃ x 24h ≤0.7
|
1620℃ x 24h ≤0.9
|
|
Thermal Conductivity (W/m·K)
|
||||
|
200℃
|
0.15
|
0.23
|
0.27
|
0.28
|
|
350℃
|
0.18
|
0.24
|
0.30
|
0.35
|
|
400℃
|
0.19
|
0.25
|
0.33
|
0.38
|
|
600℃
|
0.23
|
0.27
|
0.38
|
0.40
|
