Abstract
This paper deals with a two-stage heat treatment method in which carbon reduction smelting of niobium oxides and electron beam melting-refining of niobium are combined to produce high-purity niobium. In carbon reduction smelting, Ar plasma arc was used as a heat source, and the relations of carbon mixing mole ratio to Nb2O5 (C/Nb2O5) to the amounts of oxygen and carbon contents remaining in the reduced niobium were investigated, together with the reduction conditions for enhancing the degassing effect in the subsequent electron-beam melting stage. In the two-stage method, the recovery of niobium was examined as well as the possibility of removing or decreasing metal impurities.
Original language | English |
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Pages (from-to) | 29-38 |
Number of pages | 10 |
Journal | High Temperature Materials and Processes |
Volume | 8 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1988 Sep |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Physical and Theoretical Chemistry