Materials Transactions Online

Materials Transactions, Vol.58 No.03 (2017) pp.367-370
© 2016 The Japan Institute of Metals and Materials

Calcium Reduction of TiS2 in CaCl2 Melt

N. Suzuki1, M. Tanaka1, H. Noguchi1, S. Natsui1, T. Kikuchi1 and R. O. Suzuki1

1Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan

In this study, we reduce TiS2 to Ti via both calciothermic reduction and electrolysis in a CaCl2 melt. Upon calcium reduction at 1133 K in CaCl2 melt, the concentration of sulfur decreases to 0.03 mass% S when an amount greater than twice the stoichiometric calcium amount is added. Upon electrolysis reduction at 1173 K in CaCl2-CaS melt, the concentration of sulfur initially decreases significantly to 0.01 mass% S when a sufficiently large amount of electric charge is supplied. Our results indicate that it is possible to achieve sulfur removal via both calciothermic reduction and electrochemical reaction.


(Received 2016/09/01; Accepted 2016/11/14; Published 2017/02/25)

Keywords: titanium disulfide, calciothermic reduction, molten salt electrolysis

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  1. W. Kroll: Trans. Electrochem. Soc. 78 (1940) 35-47.
  2. G.Z. Chen, D.J. Fray and T.W. Farthing: Nature 407 (2000) 361-364.
  3. R.O. Suzuki, K. Teranuma and K. Ono: Metall. Mater. Trans., B 34 (2003) 287-295.
  4. K. Ono and R.O. Suzuki: JOM Mem. J. Miner. Met. Mater. Soc. 54 (2002) 59-61.
  5. R. O. Suzuki and K. Ono, Proc. 13th Int. Symp. on Molten Salt, (The Electrochem. Soc. Penningston, NJ) (2002) pp.810-821.
  6. R.O. Suzuki: J. Phys. Chem. Solids 66 (2005) 461-465.
  7. R. O. Suzuki, Proc. 10th World Conference on Titanium, (Deutche Geselsch. Metalk. Germany, 2003).
  8. A. Roine, HSC Chemistry, Ver.6.01, (Outokump Research Oy, Pori, Finnland, 2006).
  9. R.O. Suzuki and S. Fukui: Mater. Trans. 45 (2004) 1665-1671.
  10. R. O. Suzuki, Proceedings of 11th World Conference on Titanium (Ti-2007), (Kyoto, Japan, June 3-7, 2007). “Ti-2007 Science and Technology”, ed. by M.Niinomi, S.Akiyama, M.Ikeda, M.Hagiwara and K.Maruyama, The Japan Institute of Metals (JIM), Sendai, Japan, pp.99-102.
  11. N. Suzuki, M. Tanaka, H. Noguchi, S. Natsui, T. Kikuchi, and R. O. Suzuki, Proceeding of PRiME 2016 (Honolulu, Hawaii, October 2-7. 2016) in press.
  12. J.L. Murray: Bulletin of Alloy Phase Diagrams 7 (1986) 156-163.
  13. M. Ohta, S. Satoh, T. Kuzuya, S. Hirai, M. Kunii and A. Yamamoto: Acta Mater. 60 (2012) 7232-7240.


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