A Grade Brown Fused Alumina Sand
Description for brown fused alumina sand:
Brown fused alumina is produced by melting high-quality bauxite, iron filings, and anthracite in an electric arc furnace at high temperatures 2200β. The material is then crushed, shaped in a self-grinding machine, iron is removed by magnetic separation, and it is screened into various sizes. The main chemical component is Al2O3, with a content of 94%-96%, along with small amounts of Fe, Si, and Ti. It has a dense texture, high hardness, and is brown in color with great toughness. Brown fused alumina is suitable for manufacturing ceramic and resin high-bond abrasives, as well as for grinding, polishing, sandblasting, precision casting, and refractory materials.
Typical Physical Properties:
| Color | Brown |
| Cyrstal Form | Trigonal system |
| Specific Gravity | 3.95 |
| Bulk Density | 1.53-1.99g/cm3 |
| Mohs Hardness | β₯9 |
| Melting Point | 2200β |
| Maximum Use Temperature | 1850β |
| True Density | β₯3.60g/cm3 |
Typical Chemical Analysis for brown fused alumina sand:
| Applications | Standard Sizes | Chemical Composition (%) | Magnetic Content (%) | ||||
| Al2O3 | Fe2O3 | SiO2 | TiO2 | ||||
| Abrasives | F | 8#-80# | β₯95 | β€0.5 | β€1.5 | β€3.0 | β€0.05 |
| 90#-150# | β₯94 | β€0.03 | |||||
| 180#-240# | β₯93 | β€1 | β€2 | β€4 | β€0.02 | ||
| P | 8#-80# | β₯95 | β€0.5 | β€1.5 | β€3.0 | β€0.05 | |
| 100#-150# | β₯94 | β€0.03 | |||||
| 180#-220# | β₯93 | β€1 | β€2 | β€4 | β€0.02 | ||
| P280-P800 | β₯92 | β€0.5 | β€1.8 | β€4.0 | β | ||
| W | W63-W7 | β₯92 | β€0.5 | β€1.8 | β€4.0 | ||
| Refractories | Fraction | 0-1mm 1-3mm 3-5mm 5-8mm | β₯95 | β€0.5 | β€1.5 | β€3.0 | β |
| Fine Powder | 200-0 320-0 | β₯92.0 | β€1 | β€2 | β€4 | β | |
