Production of High-Purity Niobium by Carbon Reduction Smelting and Electron Beam Melting

Kouji Mimura, Michio Nanjo

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 languageEnglish
Pages (from-to)29-38
Number of pages10
JournalHigh Temperature Materials and Processes
Volume8
Issue number1
DOIs
Publication statusPublished - 1988 Sep

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Physical and Theoretical Chemistry

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