Reduction of CaTiO₃ by Electrolysis in the Molten Salt CaCl₂-CaO

• NOGUCHI Hiromi

  Faculty of Engineering, Hokkaido University

• NATSUI Shungo

  Faculty of Engineering, Hokkaido University

• KIKUCHI Tatsuya

  Faculty of Engineering, Hokkaido University

• SUZUKI Ryosuke O.

  Faculty of Engineering, Hokkaido University

Abstract

The reduction of CaTiO₃ to generate Ti powder with a low content of oxygen was examined by electrolysis in a CaCl₂-CaO melt. Using various sizes of the raw oxide particles, the concentration profile of the residual oxygen in the cathode basket suggests a reduction mechanism involving calcium from the melt. The residual oxygen content was influenced by the dehydration method. Vacuum dehydration above the melting temperature and decomposition of CaCl₂ hydrates below 550 K were required to eliminate water. Optimization of both water removal and the oxide particle size produced the lowest oxygen content (0.42 mass%O) in the powder.

Journal

• Electrochemistry

  Electrochemistry 86 (2), 82-87, 2018

  The Electrochemical Society of Japan

Keywords

• Molten Salt
• Calciothermic Reduction
• Calcium Titanium Oxide
• Calcium Chloride

Details

• CRID: 1390282681476009088
• NII Article ID: 130006434047
• DOI: 10.5796/electrochemistry.17-00078
• ISSN: 21862451
• ISSN: 13443542
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/86/2/86_17-00078/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Allowed