Spherical corundum particles, based on fused aluminum oxide and a method for producing said particles
US8323792B2 · kind B2 · utility
1Cited by
8References
11Claims
0Family size
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Key dates
| Filing date | Sep 13, 2006 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Apr 25, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is provided for manufacturing spherical corundum grains having a bulk density between 1.5 kg/L and 2.5 kg/L, with aluminum oxide being melted in an electric arc furnace with the addition of 0.1 to 1% quartz sand, the melt being poured in a pouring quantity of less than 100 kg/min, and the pouring stream being blown using compressed air at a pressure between 3 to 10 bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.