| Abstract Scope |
This study introduces a novel method for real-time, in-situ analysis of multi-phase molten slags in high-temperature metallurgical processes using alternating current (AC) electrical fields. Three key techniques were developed: capacitance-based detection of solid phases, the van der Pauw-Ohta method for electrical conductivity measurement, and electrical impedance tomography (EIT) for spatial imaging. Capacitance measurements enabled monitoring of crystallization by detecting changes in dielectric properties. The van der Pauw-Ohta method provided accurate conductivity data without relying on electrode geometry. EIT allowed visualization of solid and gas distributions within the melt, even during solidification. Together, these techniques offer a powerful, non-invasive platform for understanding and controlling slag behavior, improving refining efficiency, inclusion removal, and casting stability. This integrated approach supports the development of smart sensing systems for steelmaking and other high-temperature processes, contributing to enhanced process control and decarbonization efforts. |