Electroreduction mechanism and electrodeposition of ferric ions in CaO–SiO2–Al2O3–Fe2O3 slags at 1773 K. (2nd January 2023)

• Record Type: Journal Article
• Authors: Liu, Junhao; Zhang, Yaoyao
• Is Part Of: Canadian metallurgical quarterly. Volume 62:Number 1(2023)
• Page Start: 119
• Page End: 124
• Publication Date: 2023-01-02
• Subjects: Reduction mechanism -- Fe2O3-containing slag -- electrochemical reduction -- constant-current electrolysis -- electrodeposition -- CaO–Al2O3–SiO2 slags -- current efficiency -- electrolysis rate; Metallurgy -- Periodicals; 669.05
• DOI: 10.1080/00084433.2022.2060600
• Languages: English
• ISSNs: 0008-4433

Abstract

ABSTRACT: The reduction mechanism for electrodeposition of ferric ions (Fe 3+ ) in molten oxide slags and the influence of different conditions on electrolysis of molten Fe2 O3 -containing CaO–Al2 O3 –SiO2 slags under constant current were investigated. Cyclic and square wave voltammetric analyses showed that the electrochemical reduction of Fe 3+ in the molten slags involved reduction to Fe 2+ and then Fe 2+ reduction to Fe. When constant-current electrolysis was performed between a molybdenum cathode and a graphite anode, an iron-rich metallic phase formed at the cathode. Both the current efficiency and electrolysis rate increased with electrolysis current at a constant temperature. The current efficiency and electrolysis rate of high-calcium slag were higher than those of high-silicon slag.