Abstract
Activities of carbon and oxygen in Fe-O-C-Xn melts (Xn = Cr, Mn, Si) and of silicon in Fe-C-Si melts were determined in-situ by emf measurements. Electrochemical probes were developed and tested, based on ZrO2 and ThO2 solid electrolytes for C and O sensing, and based on molten silicate electrolytes for Si sensing. The probes can be immediately immersed into the metal bath at a response time of 20 to 30 s and 30 to 60 s, respectively. Accurate C and O activities were obtained from the emf measurements with ZrO2 and ThO2 electrolyte probes up to carbon saturation when a controlled pco is maintained. A reproducible emf vs silicon activity relationship resulted from measurements with a silicate electrolyte probe in carbon-saturated Fe-C-Si melts up to 1.8 wt% Si. The present results are based on laboratory-scale experiments. Further efforts are thought to be promising to develop these probes to an industrial standard.
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Romero, A.R., Ichihara, K., Engell, HJ., Janke, D. (1988). Electrochemical Sensing of Carbon, Oxygen and Silicon in Iron Melts. In: Katz, S., Landefeld, C.F. (eds) Foundry Processes. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1013-6_7
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DOI: https://doi.org/10.1007/978-1-4613-1013-6_7
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