Brown Aluminium Oxide
Brown corundum is a kind of non-metallic material made of bauxite material smelted by high-temperature electric furnace, which is then crushed and selected into various particle size specifications. Brown corundum features: aluminum content is greater than 95%, wear resistance, pressure...
Brown corundum is a kind of non-metallic material made of bauxite material smelted by high-temperature electric furnace, which is then crushed and selected into various particle size specifications.
Brown corundum features
Aluminum content is greater than 95%, wear resistance, pressure resistance, good strength, sandblasting is not easy to break, so it can generally be used repeatedly.
| use | Specification | Main chemical composition% | Magnetic material% | ||||||
| Al2O3 | Fe2O3 | SiO2 | TiO2 | ||||||
| Abrasives | F | 4#-80# | ≥95 | ≤0.3 | ≤1.5 | ≤3.0 | ≤0.05 | ||
| 90#-150# | ≥94 | ≤0.3 | ≤1.5 | ≤3.0 | ≤0.03 | ||||
| 180#-240# | ≥93 | ≤0.3 | ≤1.5 | ≤3.5 | ≤0.02 | ||||
| P | 8#-80# | ≥95.0 | ≤0.2 | ≤1.2 | ≤3.0 | ≤0.05 | |||
| 100#-150# | ≥94.0 | ≤0.2 | ≤1.2 | ≤3.0 | ≤0.03 | ||||
| 180#-220# | ≥93.0 | ≤0.2 | ≤1.2 | ≤3.0 | ≤0.02 | ||||
| W | 1#-63# | ≥92.5 | ≤0.5 | ≤1.8 | ≤4.0 | - | |||
| refractory material | Section sand fine powder | 0-1mm 1-3mm 3-5mm 5-8mm 8-12mm | ≥95 | ≤0.3 | ≤1.5 | ≤3.0 | - | ||
| 25-0mm 10-0mm 50-0mm 30-0mm | ≥95 | ≤0.3 | ≤1.5 | ≤3.0 | - | ||||
| 180#-0 200#-0 320#-0 | ≥94.5≥93.5 | ≤0.5 | ≤1.5 | ≤3.5 | - | ||||
Note: F is the specification for bonded abrasives and sandblasting, P is the specification for coated abrasives, W is micro powder, 320# is W40.
Physical properties of brown corundum
| project | index |
| color | Dark brown (dark blue after calcining) |
| Crystal form | Trigonal crystal system |
| Hardness (Mohs) | ≥9.0 |
| Melting point (℃) | 2250 |
| High operating temperature (℃) | 1900 |
| True density (g/cm3) | ≥3. 90 |
| Linear expansion coefficient (0-1600℃) | 7-9 |
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