Influence of carbon feeding on a pyrometallurgical Ta and Nb recycling process and the formation of carbides
- An existing pyrometallurgical process for tantalum and niobium recovery, mainly from low grade pyrometallurgical residues, was investigated. Series of melting experiments were carried out in a pilot-scale electric arc furnace to study how the amount, the grain size and the way of feeding affect the activity of carbon as a reducing agent. During the pyrometallurgical treatment refractory metals such as tantalum and niobium are reduced to their carbide form and enriched in the molten iron-based metal phase. The cooled down slag and metal phase were analysed to investigate thermodynamic and kinetic conditions of the carbide formation. FACT Sage simulations were also used to investigate the material system in state of thermodynamic equilibrium. Results show that mass transfer and kinetics may play an important role if compared to equilibrium analyses using FACT Sage.
Autor*innen: | Mareike Carolin Taube |
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Koautor*innen: | Christian AdamORCiD, Burkart Adamczyk, T. Beckmann, M. Reuter, M. Stelter |
Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2019 |
Organisationseinheit der BAM: | 4 Material und Umwelt |
4 Material und Umwelt / 4.4 Thermochemische Reststoffbehandlung und Wertstoffrückgewinnung | |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik |
Freie Schlagwörter: | Carbide formation; Carbon feeding; Pyrometallurgy; Reduction process; Tantalum |
Themenfelder/Aktivitätsfelder der BAM: | Umwelt |
Umwelt / Circular Economy | |
Veranstaltung: | Euopean Metallurgical Conference (EMC) 2019 |
Veranstaltungsort: | Düsseldorf, Germany |
Beginndatum der Veranstaltung: | 23.06.2019 |
Enddatum der Veranstaltung: | 26.06.2019 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 02.07.2019 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |