Product description
Bubble alumina is a new type of high-temperature insulation material. They are made of industrial alumina smelted and blown in an electric furnace. The crystal form is a-Al2O3 microcrystals. Using alumina hollow balls as the main body, it can be made into products of various shapes. The maximum operating temperature is 1800°C. The mechanical strength of the products is high, several times that of ordinary lightweight products, and the volume density is only one-half of corundum products.
Bubble alumina has been widely used in high-temperature and ultra-high-temperature kilns such as gasifiers in the petrochemical industry, carbon black industrial reactors, and induction furnaces in the metallurgical industry, and has achieved very satisfactory energy-saving effects.
Chemical and physical index of bubble alumina
|
No |
Item |
High purity |
High strength |
|
|
1 |
Chemical Composition (%) |
Al2O3 |
≥99 |
≥98.5 |
|
2 |
SiO2 |
≤0.2 |
≤1 |
|
|
3 |
Fe2O3 |
≤0.1 |
≤0.08 |
|
|
4 |
Na2O |
≤0.3 |
≤0.25 |
|
|
5 |
Stacking density, g/cm3 |
0.4-1 |
||
|
6 |
Rate of reduction, % |
≤15 |
||
|
7 |
Size, mm |
0-7 |
||
Packages:
Chemical and physical index of bubble alumina
|
No |
Item |
High purity |
High strength |
|
|
1 |
Chemical Composition (%) |
Al2O3 |
≥99 |
≥98.5 |
|
2 |
SiO2 |
≤0.2 |
≤1 |
|
|
3 |
Fe2O3 |
≤0.1 |
≤0.08 |
|
|
4 |
Na2O |
≤0.3 |
≤0.25 |
|
|
5 |
Stacking density, g/cm3 |
0.4-1 |
||
|
6 |
Rate of reduction, % |
≤15 |
||
|
7 |
Size, mm |
0-7 |
||
