Original
By certification 
LONGKETER supplying a comprehensive range of Insulating Firebrick.Insulating Firebrick are made from high-purity refractory clays ;temperature of use ranging from 1100℃ to 1700℃ and each grade is formulated to meet specific thermal and physical requirements . For higher temperature products , their addition of alumina are graduated .Each grade is added by classified organic filler . This organic filler burns out during manufacture process to give a uniform and controlled pore structure .
Key Features for Insulating Firebrick
•Low thermal conductive , low heat storage
•Purity
•Good thermal insulation , enable the use of thin-walled constructions
•The good alumina contents confer good refractoriness
•Low iron and alkali fluxcontent contributes to their stability to reducing atmosphere
•These can be machined to special shapes , incurring fewer sections and joints
Insulating Firebrick are classified to Clay Insulating Brick,High Alumina Insulating Brick and Mullite Insulating Brick.
Clay Insulating Brick Product Data
Type |
NG-1.5 |
NG-1.3a |
NG-1.3b |
NG-1.0 |
NG-0.9 |
NG-0.8 |
NG-0.7 |
NG-0.6 |
NG-0.5 |
NG-0.4 |
Density(kg/m³） |
1.5 |
1.3 |
1.3 |
1.0 |
0.9 |
0.8 |
0.7 |
0.6 |
0.5 |
0.4 |
Cold Crushing Strength (Mpa) |
5.9 |
4.4 |
3.9 |
2.9 |
2.5 |
2.5 |
2.0 |
1.5 |
1.2 |
1.0 |
Experimental Temperature of 2% Change of Reheating Line |
1400 |
1400 |
1350 |
1350 |
1300 |
1250 |
1250 |
1200 |
1150 |
1150 |
Thermal Conductivity |
0.70 |
0.60 |
0.60 |
0.50 |
0.40 |
0.35 |
0.35 |
0.25 |
0.25 |
0.20 |
High Alumina Insulating Brick Product Data
Type |
LG-1.0 |
LG-0.9 |
LG-0.8 |
LG-0.7 |
LG-0.6 |
LG-0.5 |
LG-0.4 |
Density(kg/m³） |
1.0 |
0.9 |
0.8 |
0.7 |
0.6 |
0.5 |
0.4 |
Cold Crushing Strength (Mpa) |
≥4.0 |
≥3.5 |
≥3.0 |
≥2.5 |
≥2.0 |
≥1.5 |
≥0.8 |
Experimental Temperature of 2% Change of Reheating Line |
1400 |
1400 |
1400 |
1350 |
1350 |
1250 |
1250 |
Thermal conductivity(W/m.k) 350±25℃ |
≤0.50 |
≤0.45 |
≤0.35 |
≤0.35 |
≤0.30 |
≤0.25 |
≤0.20 |
Al2O3 |
≥48 |
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Fe2O3 |
≤2 |
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Mullite Insulating Brick Product Data
Type |
JM23 |
JM26 |
JM28 |
JM30 |
|
Classification temperature(℃) |
1260 |
1430 |
1540 |
1600 |
|
Properties at mean temperature |
|||||
Density(kg/m³） |
500 |
800 |
900 |
1100 |
|
Compressive strength(Mpa) |
1.0 |
2.0 |
2.5 |
3.0 |
|
Rupture strength (Mpa) |
0.7 |
1.5 |
1.8 |
2.0 |
|
Properties at high temperature |
|||||
Thermal conductivity(W/m.k) |
0.22(600℃) 0.27(800℃) |
0.39(800℃) 0.43(1000℃) |
0.37(800℃) 0.41(1000℃) |
0.43(800℃) 0.45(1000℃) |
|
Chemical composition (%) |
Al2O3 |
45 |
55 |
64 |
73 |
SiO2 |
48 |
41 |
32 |
25 |
|
Fe2O3 |
1.0 |
0.9 |
0.7 |
0.6 |
|
Items |
Index |
Max Service temperature(℃) |
1260 |
Density(kg/m³） |
850±10% |
Compressive strength(MPa) |
≥14 |
Flexural strength (MPa) |
≥5.8 |
Thermal conductivity(W/m.k) |
≤0.10(400℃) ≤0.12(800℃) |
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