Structural analysis of molten materials by a remote fiber optic Raman sensor

Abstract

This study presents a novel in situ high-temperature fiber optic Raman probe that enables the study of the physical properties and structure of molten samples at temperatures up to 1400 °C. To demonstrate the functionality of the hightemperature fiber optic Raman probe, different composition mold fluxes were evaluated in this report. The Raman spectra at flux molten temperature were successfully collected and analyzed. A deconvolution algorithm was employed to identify peaks in the spectra associated with the molecular structure of the components in each sample. The experimental results demonstrate that the composition-dependent Raman signal shift can be detected at high temperatures, indicating that molten materials analysis using a high-temperature Raman system shows significant promise. This flexible and reliable high-temperature Raman measurement method has great potential for various applications, such as materials development, composition and structure monitoring during high-temperature processing, chemical identification, and process monitoring in industrial production.

Distributed fiber optic sensors for applications in electric arc furnaces

“…(OFDR), among others, have opened new avenues for in-situ chemical composition analyses, distributed strain and temperature monitoring in various steel industry's operation monitoring [11] [12][13] [14][15] [16] [17]. FOS is particularly suitable for sensing in steel-making applications due to its capability for distributed sensing, and immunity to electromagnetic interference (EMI) and corrosion, common in steel-making facilities [18] [19]. Moreover, their miniature size facilitates easy retrofitting onto existing industrial facilities, enabling in-situ process monitoring, multi-parameter sensing, and cost-effective implementation [20][21] [22][23] [24][25] [26].…”