| Message: | Brown fused alumina is produced from high quality calcined bauxites in a pouring electric arc furnace. It is fused and purified in a high temperature over 2200 ℃ and followed by slow solidification.
Brown fused alumina has high toughness and hardness, a high melting point, good chemical corrosion resistance and thermal conductivity. The content of alumina is over 95%. The good grinding ability, wide application, low price make Brown fused alumina the most basic abrasive material. Brown fused alumina is often used as replacement in other abrasives’ absence.
Physical index:
Color Brown
Basic Mineral α- Al2O3
Crystal system Hexagonal
True Density 3.90g/cm3
Bulk Density 1.68-1.95g/cm3
Mosh hardness 9.0
Microhardness HV1800-2200
Chemical Composition(%):
Grit size Al2O3 TiO2 SiO2 Fe2O3 CaO
F4-F80 95.0-96.0 1.50-3.80 1.21 0.3 0.45
F90-F150 94.5-95.5
F180-F220 93.5-95.5
F220Finer ≥92.00
Abrasives Grade:
Grit size AI2O3 TiO2 SiO3 Fe2O3
F12-F80 >96.0% 1.50-3.50% 1.3% 0.3%
F90-F150 >95.2%
F180-F220 >95.0%
F220 Finer >93.0%
Refractory Grade:
Grade size Al₂O₃ TiO₂ SiO₂ Fe₂O₃
0-1mm >95.2% >3.5% >1.0% >0.2%
1-3mm >95.2% >3.5% >1.0% >0.2%
3-5mm >95.2% >3.5% >1.0% >0.2%
5-8mm >95.2% >3.5% >1.0% >0.2%
200mesh >95.0% >3.5% >2.0% >0.4%
325mesh >95.0% >3.5% >2.0% >0.4%
Brown fused alumina is used to make coated and bonded abrasives tools, lapping and polishing process, sandblasting, producing mold of precision casting, grinding wheels like both vitrified and resin bonded.
Size Available:
Abrasives F16-F1200, P12-P1200
Refractory 0-1mm,1-3mm,3-5mm,200mesh,325mesh
Other special specifications could be supplied as required. |
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