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Brown Fused Alumina, White fused alumina(called as corundum sand) is made by chemical grade calcined alumina with electron fusing in temperature over 2000ºC. Characterized with phase, thermal and chemical stability, it is idea raw material for products like ceramic roller, kiln furniture and refractory products for metallurgy.
REFRACTORY GRADE
| Chemical Properties (% wt) |
Parameters |
Typical |
Min |
Max |
| Al2O3 |
96.10 |
95.50 |
– |
| Fe2O3 |
0.14 |
– |
0.30 |
| SiO2 |
0.85 |
– |
1.00 |
| TiO2 |
2.20 |
– |
3.00 |
| CaO |
0.15 |
– |
– |
| MgO |
0.22 |
– |
– |
| Physical Properties(% wt) |
Magnetics |
0 |
– |
0.05 |
| Moisture |
0.05 |
– |
0.20 |
| Hardness |
2090 Knoop |
9 Mohs |
– |
| Bulk density g/cm3 |
3.95 |
3.90 |
– |
| MM size |
minus 1 mm,1-3mm,3-5mm,5-10mm |
| Mesh sizes |
3×6 mesh,6×14 mesh,14×70 mesh,miuus 70 mesh,minus 100 mesh….(other mm or mesh sizes available upon request) |
| Packing |
In 1,000-1,500 kilos super sacks,or 25 kilos paper bags Special quantity packaging and labeling available. |
ABRASSIVE GRADE
| Chemical Properties (% wt) |
Item |
Typical |
Min |
Max |
| Al2O3 |
95.50 |
95.50 |
96.00 |
| Fe2O3 |
0.15 |
– |
0.30 |
| SiO2 |
0.88 |
– |
1.20 |
| TiO2 |
2.70 |
2.50 |
3.20 |
| Physical Properties(% wt) |
Magnetics |
0.03 |
– |
0.05 |
| Moisture |
0.05 |
– |
0.20 |
| Hardness |
2090 Knoop |
9 Mohs |
– |
| Grain form |
Angular-cubic |
| Bulk density g/cm3 |
3.94 |
3.90 |
– |
| Grit sizes |
A full range of size from # 10 to # 320 TO ANSI,ISO and FEPA specifications |
| Packing |
In 1,000-1,500 kilos super sacks,or 25 kilos paper bags Special quantity packaging and labeling available. |
WHITE ALUMINA
| Item |
4 size |
Powder |
| Al2O3 |
99% min |
98.5% min |
| Na2O |
0.4% max |
0.4 % |
| SiO2 |
0.2% max |
0.25% max |
| Fe2O3 |
0.15% max |
0.5% max |
| Hardness(Mohs) |
9.0 min |
| True density |
3.95 g/cc min |
| Principal crystalline Phase |
α-Al2O3 |
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