Zirconium and hafnium separation with molten salt extraction in Sn–Cu–Zr–Hf and Cu–Zr–Hf alloy systems

L. Xu, Y. Xiao, A. van Sandwijk, Z. Zhao, J. Li, Q. Xu, Y. Yang

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Chemical-grade zirconium contains about 1–3 wt% hafnium, which is harmful for nuclear applications due to its high neutron-capture cross section. In the present paper, Zr-Hf separation in Sn-Cu-Zr-Hf and Cu-Zr-Hf alloy systems using molten salt containing CuCl2 or CuF2 was thermodynamically evaluated and lab-scale experiments on zirconium and hafnium separation in different molten salt systems were conducted. The best single-step Hf removal efficiency and Zr-Hf separation factor of about 95% and 9.0, respectively, were obtained with a NaCl-CaCl2-CuCl2 (3 wt%) molten salt system at 850°C and the CuCl2/Hf stoichiometric ratio of 1.5.

Original languageEnglish
Pages (from-to)1664-1674
JournalSeparation Science and Technology (Philadelphia)
Volume51
Issue number10
DOIs
Publication statusPublished - 2016

Keywords

  • Hafnium removal
  • molten salt extraction
  • nuclear-grade zirconium
  • Zr-Hf separation

Fingerprint Dive into the research topics of 'Zirconium and hafnium separation with molten salt extraction in Sn–Cu–Zr–Hf and Cu–Zr–Hf alloy systems'. Together they form a unique fingerprint.

Cite this