NEW PROCESSES FOR ELECTROWINNING

Ionic Conduction of Oxygen and Calciothermic Reduction in Molten 

Suzuki, D. Yamada, S. Osaki, R. F. Descallar-Arriesgado and T. Kikuchi 

The authors have often commented on the thermochemical importance of metallic calcium condensation near the cathode from the bulk, while oxygen ion transfer from the cathode to the anode is also reported in the electrochemical viewpoint of oxidation and reduction [4-6]. However, the ionic transport number and the dominant species for charge carrier are not known well. The purpose of this work is to study the ionic transport behavior of oxygen and calcium in a molten CaO-CaCl2 salt, and to know their contributions to the direct oxide reduction at the cathode. 

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