Abstract
The composition dependences of electrical conductivity of FexO–CaO–SiO2–Al2O3 slags at different oxygen potentials and temperatures have been studied experimentally in the present work. From the experimental results, the total electrical conductivity and electronic conductivity for all the slags monotonously decrease as increasing CO/CO2 ratio from about 0 to 1. With the increase of FexO content, the total electrical conductivity and electronic conductivity increase at a fixed CO/CO2 ratio. It is also found that the ionic conductivity of all the studied slags increases as increasing the CO/CO2 ratio, which is resulted from the increase of Fe2+ ion concentration. In addition, the temperature dependences of ionic, electronic and total conductivity for different compositions obey the Arrhenius law. The electronic transference number exhibits a strong relationship with oxygen potential, but is independent of temperature.
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