2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 7: Ionic Liquids & Energy Production

Editors:Kongoli F, Gaune-Escard M, Mauntz M, Rubinstein J, Dodds H.L.
Publisher:Flogen Star OUTREACH
Publication Year:2015
Pages:310 pages
ISBN:978-1-987820-30-0
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
CD-SIPS2015_Volume
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    Electrochemical Reduction of Zirconium Dioxide in Calcium Oxide - Calcium Chloride Melts

    Larisa Grytsay1; Anatoliy Omel'chuk1;
    1UKRAINIAN NATIONAL ACADEMY OF SCIENCES V.I.VERNADSKY INSTITUTE OF GENERAL & INORGANIC CHEMISTRY, Kyiv-142, Ukraine;
    Type of Paper: Regular
    Id Paper: 296
    Topic: 13

    Abstract:

    The results of studies of electrochemical extraction of zirconium from its dioxide by the FFC Cambridge Process are presented in this report. In contrast to the known technical solution, it was proposed a carry out electrochemical reduction on liquid gallium cathode. As the electrolyte, the system CaO-CaCl2-MCl, where M = Li, Na was used. In the temperature range 873-1023 K, the recovery of zirconium is at least 75% and is higher than the lowest acid strength melt-electrolyte. Effective recovery zirconium dioxide occurs when the current density is not lower than 0,2 A/cm2.The product of recovery is finely zirconium powder with particle size 0,01-0,03 mm and specific surface area of 20,84 m2/g. The content of impurities of gallium and oxygen in obtained zirconium were not found.

    Keywords:

    Zirconium, zirconium dioxide, electrochemical extraction, molten salt, gallium cathode

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    Cite this article as:

    Grytsay L and Omel'chuk A. Electrochemical Reduction of Zirconium Dioxide in Calcium Oxide - Calcium Chloride Melts. In: Kongoli F, Gaune-Escard M, Mauntz M, Rubinstein J, Dodds H.L., editors. Sustainable Industrial Processing Summit SIPS 2015 Volume 7: Ionic Liquids & Energy Production. Volume 7. Montreal(Canada): FLOGEN Star Outreach. 2015. p. 221-222.