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1800 Degree Centigrade Alumina Hollow Ball For Brick
Alumina hollow ball is a new type of high temperature insulation material which is made from industrial aluminum treated by smelting in an electric furnace. The crystal form is a-Al2O3 micro crystals.
Alumina Hollow Ball can be made into various shpes with the highest temperature 1800 ℃, which is of high mechanical strength, and the volume density is only one-half of corundum products.
There are mixed grade alumina hollow ball and graded ball two types:
mixed-level ball diameter: 0.2-5mm
graded ball diameters: 0.2-1mm, 1-2mm, 2-3mm, 3-5mm.
Chemical index | |||||||||
size |
Al2O3 |
Fe2O3 |
SiO2 |
Na2O |
MgO |
K2O |
Cao |
||
0.2-5mm |
≥99% |
≤0.15% |
≤0.3% |
≤0.5% |
≤0.1% |
≤0.1% |
≤0.1% |
||
Physical index | |||||||||
Bulk density |
refractoriness |
Shape |
|||||||
0.5-1g/cm3 |
1800 degree centigrade |
White hollow ball |
|||||||
Bulk density(g/cm3)
Item |
5-4mm |
4-3mm |
3-2mm |
2-1mm |
1-0.5mm |
3-0.2mm |
0.5-0.2mm |
g/cm3 |
0.45 |
0.55 |
0.65 |
0.75 |
0.85 |
0.85 |
0.95 |
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