Pink Fused Aluminum Oxide contain chromium oxide, which gives the material its pink color. The incorporation of Cr2O3 into the Al2O3 crystal lattice produces an increase in toughness and a reduced friability compared with White Fused Aluminum Oxide.
Compared to Brown Fused Aluminum Oxide, the Pink and Ruby materials are harder, more aggressive, and have better cutting ability. The grain shape of Pink & Ruby Aluminum Oxide is sharp and angular.
The main component of pink corundum is α-alumina, also called chromium corundum or ruby.
The main mineral composition is α-Al2O3-Cr2O3 solid solution.
The secondary mineral composition is a small amount of composite spinel (or no composite spinel) and refractory bricks with a chromium oxide content of 1% to 30%.
Chrome corundum uses aluminum oxide as the main raw material and is adapted to chromium oxide, etc. Made by smelting at high temperatures. It is pink in color, has a hardness similar to that of white corundum, and has higher toughness than white corundum. The abrasive tools made of it have good durability and high grinding finish. Suitable for precision grinding of measuring tools, machine tool spindles, instrument parts, threaded workpieces and template grinding.
Resin grinding wheels such as ultra-thin cutting discs, grinding discs, and grinding wheels have good durability and sharpness.
Ceramic grinding wheels such as machine tool grinding wheels, cup grinding wheels, bowl grinding wheels, grinding heads, etc.
Coated abrasive tools such as polishing wheels, emery cloth and sandpaper, manicure strips, etc.
Sandblasting operations with relatively high sandblasting requirements
Grinding of precision instrument components
Internal grinding of tool steel, stainless steel, quenched steel, tool grinding, copy grinding, form grinding, grinding of cutting tools, measuring tools, threaded workpieces, instrument parts, etc.
It is an excellent refractory raw material used in steel, casting, petrochemical industry, breathable bricks, ladle linings, castables, prefabricated parts, ceramics and other fields. It has high refractoriness, high hardness, good thermal shock stability, good corrosion resistance and wear resistance, and stable performance.
| Chemistry | F12～F80 | F90～F150 | F180～F220 | |
| Low Chromium | AL2O3 | ≥98.5% | ≥98.5% | ≥98.0% |
| Cr2O3 | 0.20-0.45% | 0.20-0.45% | 0.20-0.45% | |
| NA2O | ≤0.50% | ≤0.55% | ≤0.60% | |
| Medium Chromium | AL2O3 | ≥98.2% | ≥98.2% | ≥97.8% |
| Cr2O3 | 0.45-1.0% | 0.45-1.0% | 0.45-1.0% | |
| NA2O | ≤0.55% | ≤0.60% | ≤0.70% | |
| High Chromium | AL2O3 | ≥97.4% | ≥97% | ≥96.5% |
| Cr2O3 | 1.0-2.0% | 1.0-2.0% | 1.0-2.0% | |
| NA2O | ≤0.55% | ≤0.60% | ≤0.70% | |
| Basic minerals | Crystal size | Mohs hardness | Nup hardness | Melting point | Proportion | Bulk density | Colour | Crystal form |
| α-Al2O3 | 600-800 | 9 | 2200-2300 | 2050℃ | 3.9-4.1g/cm3 | 1.40-1.91 | Pink | Polygonal shape |
| μm | kg/cm3 | g/cm3 |
Chromium fused aluminum magnetic material content (%)
| Particle size range | Low chromium | Medium chromium | High chromium |
| F12-F30 | 0.004 | 0.005 | 0.006 |
| F36-F60 | 0.0036 | 0.0045 | 0.0055 |
| F70-F120 | 0.0032 | 0.004 | 0.005 |
| F150-F220 | 0.0028 | 0.0036 | 0.004 |
F8-F220,F240-F1200 or any other sizes by customer's requirement.
