Brown Aluminium Oxide
Type: A-20B We produce this kind of Brown Aluminium Oxide grain normally used in blasting or polishing applications, such as removal of oil, grease, dirt, loose mill scale, lacquer kicking off, cloth grinding, glass blasting and other applications. Usually we call it blasting grade BFA sand. Process way: Second grade |
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Typical Chemical Analysis
| Al2O3 | Fe2O3 | TiO2 | SiO2 |
92.13% | 2.38% | 2.98% | 2.10% |
Physical Properties
| Color | Dark brown |
| Shape | Blocky, tough and sharp |
| Crystal Form | Alpha-alumina trigonal system |
| True Specific Gravity | 3.96 g/cm3 |
| Hardness | 2090 Knoop scale; 9.0 Mohs scale |
| Melting Temperature | About 2050 ℃ |
Grain Size Distribution
| Loose grains. |
Grit Sizes (F)
| 8 | 12 | 14 | 16 | 20 | 22 | 24 | 30 | 36 | 40 | 46 | 54 |
| 60 | 70 | 80 | 90 | 100 | 120 | 150 | 180 | 220 | 240 | 280 | 320 |
Bulk Density Test Value (g/cm3)
| Grit No | F12 | F14 | F16 | F20 | F24 | F30 | F36 | F40 | F46 |
| B.D | 1.79-1.87 | 1.76-1.84 | 1.74-1.82 | 1.72-1.80 | 1.70-1.78 | 1.68-1.76 | 1.66-1.74 | 1.63-1.71 | 1.61-1.69 |
| Grit No | F54 | F60 | F70 | F80 | F100 | F120 | F150 | F180 | F220 |
| B.D | 1.59-1.67 | 1.57-1.65 | 1.54-1.62 | 1.51-1.59 | 1.48-1.56 | 1.45-1.53 | 1.43-1.52 | 1.41-1.49 | 1.40-1.48 |