2013 Hot Sale Alumina Lightweight Bricks
Specifications
Alumina lightweight Bricks1,high temperature resistance
2.low thermal conductivity
3. good thermal insulation
Alumina lightweight Bricks
Scope of application
They are widely used in inner linings of various non-contacted melt high temperature kiln and thermal insulating layers of high temperature kilns.
Physical and Chemical Indexes of Hollow Alumina Sphere Bricks | |||||
Name / Indexes/ Item |
MLQ-1.5 |
LQ-1.2 |
LQ-1.5 |
LQ-1.7 |
|
Chemical composition |
Al2O3 % ≥ |
84 |
98.5 |
98.5 |
98.5 |
Fe2O3 % ≤ |
0.8 |
0.3 |
0.3 |
0.3 |
|
SiO2 % ≤ |
15 |
1.0 |
1.0 |
1.0 |
|
Bulk density g/m3≤ |
1.5 |
1.2 |
1.5 |
1.7 |
|
Compressive strength at normal temperature MPa≥ |
16 |
3 |
12 |
15 |
|
Porosity % ≥ |
58 |
62 |
60 |
58 |
|
Soften point at 0.1MPa KD°C≥ |
1650 |
1650 |
1700 |
1700 |
|
Fire resistant (°C)≥ |
1800 |
1800 |
1800 |
1800 |
|
Thermal conductivity Hot side 1000°C W/m.k≤ |
1.2 |
0.95 |
1.05 |
1.15 |
|
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