TY - JOUR
T1 - One-step electrochemical reduction of stibnite concentrate in molten borax
AU - Kartal, Levent
AU - Daryal, Mehmet Barış
AU - Şireli, Güldem Kartal
AU - Timur, Servet
N1 - Publisher Copyright:
© 2019, University of Science and Technology Beijing and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - 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°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·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·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·cm−2 current density, antimony reduction reached 30.7 g and 99% of the antimony fed to the cell was obtained as metal.
AB - 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°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·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·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·cm−2 current density, antimony reduction reached 30.7 g and 99% of the antimony fed to the cell was obtained as metal.
KW - antimony
KW - antimony extraction
KW - borax
KW - electrochemical reduction
KW - molten salt electrolysis
KW - stibnite
UR - http://www.scopus.com/inward/record.url?scp=85073230677&partnerID=8YFLogxK
U2 - 10.1007/s12613-019-1867-9
DO - 10.1007/s12613-019-1867-9
M3 - Article
AN - SCOPUS:85073230677
SN - 1674-4799
VL - 26
SP - 1258
EP - 1265
JO - International Journal of Minerals, Metallurgy and Materials
JF - International Journal of Minerals, Metallurgy and Materials
IS - 10
ER -