One-step electrochemical reduction of stibnite concentrate in molten borax
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Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, antimony production from a stibnite concentrate (Sb2S3) was performed in one step using a molten salt electrolysis method and borax as an electrolyte. Electrochemical reduction of the stibnite concentrate was performed at 800 degrees C under galvanostatic conditions and explained in detail by the reactions and intermediate compounds formed in the borax. The effects of current density (100-800 mA center dot cm(-2)) and electrolysis time (10-40 min) on cathodic current efficiency and antimony yields were systematically investigated. During the highest current efficiency, which was obtained at 600 mA center dot cm(-2), direct metal production was possible with 62% cathodic current efficiency and approximately 6 kWh/kg energy consumption. At the end of the 40-min electrolysis duration at 600 mA center dot cm(-2) current density, antimony reduction reached 30.7 g and 99% of the antimony fed to the cell was obtained as metal.
Açıklama
Anahtar Kelimeler
molten salt electrolysis, electrochemical reduction, antimony, antimony extraction, stibnite, borax
Kaynak
International Journal Of Minerals Metallurgy And Materials
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
26
Sayı
10
