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Anodic processes during recovery of tellurium from oxyhalogenide melts

  • Metallurgy of Rare and Noble Metals
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Russian Journal of Non-Ferrous Metals Aims and scope Submit manuscript

Abstract

The process kinetics on a graphite anode in oxyhalide melts based on the CsCl–KCl–NaCl eutectic with TeO2 and NaF additives is investigated at 600°C. Dependences of limiting recharge currents of tellurium atoms and residual discharge currents of oxygen-containing ions on the TeO2 and NaF contents are investigated. Exceeding these currents leads to chlorine liberation in oxychloride melts and liberation of freons in chloride–fluoride melts. The dissolution mechanism of TeO2 in chloride and chloride–fluoride melts through the formation and subsequent dissociation of tellurium oxychloride with the formation of O2–, TeCl 2-6 , and [TeO2Cl]– ions is proposed. The presence of these ions in the electrolyte is confirmed by infrared spectroscopy and explains high discharge rates of oxygen-containing ions at the anode.

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Authors and Affiliations

  1. Ural Federal University, ul. Mira 19, Yekaterinburg, 620002, Russia

    V. A. Lebedev, A. V. Babin, A. Yu. Nikolaev & A. V. Lukinskikh

  2. OAO Elektromed’, ul. Lenina 1, Verkhnyaya Pyshma, Sverdlovsk oblast, 624091, Russia

    F. F. Mukhmadeev & V. A. Shunin

  3. OOO UGMK-Kholding, ul. Lenina 1, Verkhnyaya Pyshma, Sverdlovsk oblast, 624091, Russia

    A. B. Lebed’

Authors
  1. V. A. Lebedev
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  2. A. V. Babin
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  3. A. Yu. Nikolaev
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  4. A. V. Lukinskikh
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  5. F. F. Mukhmadeev
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  6. V. A. Shunin
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  7. A. B. Lebed’
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Corresponding authors

Correspondence to V. A. Lebedev, A. V. Babin, A. Yu. Nikolaev, A. V. Lukinskikh, F. F. Mukhmadeev, V. A. Shunin or A. B. Lebed’.

Additional information

Original Russian Text © V.A. Lebedev, A.V. Babin, A.Yu. Nikolaev, A.V. Lukinskikh, F.F. Mukhmadeev, V.A. Shunin, A.B. Lebed’, 2015, published in Izvestiya VUZ. Tsvetnaya Metallurgiya, 2015, No. 3-1, pp. 30–34.

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Lebedev, V.A., Babin, A.V., Nikolaev, A.Y. et al. Anodic processes during recovery of tellurium from oxyhalogenide melts. Russ. J. Non-ferrous Metals 56, 399–403 (2015). https://doi.org/10.3103/S1067821215040124

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  • DOI: https://doi.org/10.3103/S1067821215040124

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