Bubble Alumina Castable
Bubble alumina castable is made by industry alumina power or corundum power etc refractory powder,CA-70 or CA-80 cement,soft clay, aluminum phosphate,aluminum sulfate as binder and admixture .
Technical data sheet
|
Al2O3 |
94.8 |
80.8 |
95.4 |
95.8 |
|
|
Fe2O3 |
- |
0.6 |
0.13 |
- |
|
|
CaO |
3.4 |
3.3 |
2.18 |
- |
|
|
Bulk density g/cm3 |
1.60 |
1.46 |
1.58 |
<1.3 |
|
|
Compressive strength MPa |
110°C |
27.1 |
19.0 |
9.7 |
7.4 |
|
1500°C |
32.2 |
22(1000°C) |
26.6 |
21.2 |
|
|
Bending Strength MPa |
110°C |
9.1 |
5.4 |
4.9 |
- |
|
1500°C |
10.8 |
- |
13.7 |
- |
|
|
Refractoriness under load °C |
0.6% |
>1600 |
- |
- |
1650 |
|
Thermal conductivity W/(m.k) |
1000°C |
0.80 |
0.82 |
0.65 |
0.76 |
|
Service temperature °C |
1800 |
1600 |
>1600 |
>1600 |
|
Feature
1.Low bulk density and low thermal conductivity,
2.High refractoriness under load
3.High mechanical strength,
4.Good thermal shock resistance,
5.Tiny linear variation,no cracking,
6.Resistant to scour and erosion,abrasion,
7.Good volume stability under high temperature,
8.Easy to operate: times and labor saving.
Application
Used for metallurgy, petrochemical and carbon black etc industries shaft furnace.
