Method for the reduction of metallic compounds
US5976217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Aug 28, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The preparation of suitable powdered metal is important in powder metallurgy technology. To date, powdered metals, in particular refractory metals, have been produced using very time-consuming and, consequently, costly methods for the reduction of metallic compounds, e.g. by reducing solid metallic compounds to powdered metal in fluidized bed ovens or pusher-type furnaces. In the present invention, powdered metallic compounds are reduced by retaining the solid phase as a continuous process by particles passing through a reaction chamber to predetermined orbits. The process lasts on average 0.4 to 60 s, and the level of completeness of the process is at least 90%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.