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Silicon recovery from silicon-iron alloys by electrorefining in molten fluorides

Massot, Laurent and Bieber, Anne-Laure and Gibilaro, Mathieu and Cassayre, Laurent and Taxil, Pierre and Chamelot, Pierre Silicon recovery from silicon-iron alloys by electrorefining in molten fluorides. (2013) Electrochimica Acta, 96. 97-102. ISSN 0013-4686

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Official URL: http://dx.doi.org/10.1016/j.electacta.2013.02.065


Electrorefining of a silicon-iron material (Si-4.7at%Fe) in molten NaF-KF at 850°C has been investigated in view of recovering pure Si, using electrochemical techniques, SEM-EDS and ICP-AES analyses. The selective electrochemical dissolution of Si was evidenced. Electrorefining runs led to a maximum Si recovery of 80% of the initial Si contained in the material, in the form of a dense deposit at the cathode, with very high current efficiencies. The Si purity has been examined and no Fe was detected by ICP-AES analysis: the recovered Si purity is thus assumed to be higher than 99.99%.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://dx.doi.org/10.1016/j.electacta.2013.02.065
HAL Id:hal-00805734
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:28 Mar 2013 15:57

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