Anodic Processes under Extraction Tellurium from Oxihalide Melts
https://doi.org/10.17073/0021-3438-2015-0-30-34
Abstract
There was investigated kinetic of processes on graphite anode in oxidative melt on the base of eutectic CsCl–KCl–NaCl with additives TeO2 and NaF at temperature 600 °C. There were researched relationships between limiting current of ions tellurium’s overcharge and limiting current of discharge of oxygen-containing ions and content of TeO2 and NaF. Excess of these currents leads to chlorine evolution in oxychloride melts and freons in oxychloride-fluoride melts. There was offered mechanism of TeO2 dissolution in chloride and chloride-fluoride melts with generation and subsequent dissociation of tellurium oxychloride with forming of O2–, TeCl6 2–, and [TeO2Cl]–. Its availability in electrolyte was confirmed by method of infrared spectroscopy, and explains high rate of discharge of oxygenated ions at the anode.
About the Authors
V. A. LebedevRussian Federation
A. V. Babin
Russian Federation
A. Yu. Nikolayev
Russian Federation
A. V. Lukinskikh
Russian Federation
F. F. Mukhmadeev
Russian Federation
V. A. Shunin
Russian Federation
A. B. Lebed
Russian Federation
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Review
For citations:
Lebedev V.A., Babin A.V., Nikolayev A.Yu., Lukinskikh A.V., Mukhmadeev F.F., Shunin V.A., Lebed A.B. Anodic Processes under Extraction Tellurium from Oxihalide Melts. Izvestiya. Non-Ferrous Metallurgy. 2015:30-34. (In Russ.) https://doi.org/10.17073/0021-3438-2015-0-30-34