White corundum 280# for coating additive
INTRODUCE
White corundum 280# for coating additive belongs to electro-corundum. It is also be called white aluminum oxide, white corundum or white fused aluminum oxide. White fused alumina is obtained from the fusion of high purity calcined alumina in electric arc furnaces. Compared with brown fused alumina, white fused alumina is characterized with high alumina purity, high hardness, chemical stability, high melting point, and large crystal size. It is widely used in coated and bonded abrasives, polishing, precision casting, sandblasting and refractory raw materials.
Chemical Analysis
| Al2O3 | 99.50%min |
| SiO2 | 0.02%max |
| Fe2O3 | 0.04%max |
| Na2O | 0.30%max |
Physical Properties:
| Color | White |
| Crystal System | Trigonal system |
| Mohs Hardness | ≥9 |
| Melting Temperature(℃) | 2250 |
| Refractory Temperature(℃) | 1900 |
| True Density | ≥3.5 |
| Grain shape | Block, with sharp edges |
| Specific gravity | Approx. 3,9 5 g/m³ |
| Bulk density (Dependent on grain size) | Approx. 1.75-1.95 g/m³ |
White corundum 280# for coating additive
High Alumina
White corundum 280# for coating additive has a Aluminium Oixde(Al2O3) content of more than 99%. The high alumina content is ensured from its raw material which is calcined alumina.The high content of Al2O3 makes it perform well in fireproof and refractory applications.
Little Impurities
White corundum 280# for coating additive has very little impurities, usually less than 0.4% Na2O, less than 0.15 SiO2 and less than 0.15 Fe2O3. It is chemically stable and little impurities make it ideal for refractory uses.
High Hardness
The high content of Al2O3 (Aluminum Oxide) makes it to be with very high hardness (Mosh Hardness≥9) and It’s usually utilized for grinding ,cutting, lapping, sandblasting, polishing, surface preparing and also for coated abrasive application, including sandpaper and sand belt.It’s not easy to break and good for abrasives. In abrasives industries, it is used for cutting wheels, grinding wheels etc, also used for coated abrasives applications like sandpapers. It’s white color and little impurities also make it excellent grinding and sandblasting media for preparing and polishing surface of metal, ceramic products etc. WA fines is also an good material for polishing and water jetting in electronics industry.
Sharp Edges
White corundum 280# for coating additive is a crystal mineral with sharp edges and widely used in sandblasting,cutting and grinding abrasives
• coating additive
• Grinding, lapping and polishing medium
• Coated and bonded abrasives grain materials
• Precision casting
• Refractory raw materials
• Ware-resistance
• Road surface preparation
Available Grain Size
F8F10F12F14F16F20F24F30F36F46F54F60F70F80F90F100F120F150F180F220F240
JIS#8#10#12#14#16#24#30#36#46#54#60#70#80#90#100#120#150#180#220
Package & Delivery
-25kg/bag+40bag/1mt jumbo bag
-25kg/bag+40bag/ pallet avaliable
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