Method for taking care of metallic waste products by remelting
US4251266A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1979 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Sep 11, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B9/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method of taking care of the contents of valuable metals in grindings and other waste products of superalloys. The material is led into a metallic melt, preferably by injecting it by means of a carrier gas. The charge is heated up in the inductive way. The material contains aluminium and/or tantalum, or can these elements be added separately to the charge, thus preventing an oxidation of such valuable metals as vanadium, tantalum and niobium and obtaining a high yield of these elements. After the remelting, aluminium and/or titanium can be selectively oxidized by injecting into the charge oxygen and/or water vapor, a slag having a certain oxygen potential or a metal oxide where the metal has a lower affinity to oxygen as compared with aluminium and/or titanium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.