Theoretical calculations and thermal experimental study on solid- liquid phase change processes in metallic iron via VIS-NIR spectroscopy prediction

Theoretical calculations and thermal experimental study on solid- liquid phase change processes in metallic iron via VIS-NIR spectroscopy prediction | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Theoretical calculations and thermal experimental study on solid- liquid phase change processes in metallic iron via VIS-NIR spectroscopy prediction Linghui Meng, Kai Dong, Chao Feng, Yun Zhou, Ceng Li, Hongchen Zhao, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7485659/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The melting behavior of scrap steel directly influences the scrap ratio in converters, energy consumption of electric arc furnaces (EAFs), and stability of hot metal pretreatment. Investigating its melting mechanism and detection methods is of great significance for optimizing smelting processes and enhancing resource utilization efficiency. Centering on the high-temperature self-luminescence characteristics of metallic iron—the core component of scrap steel—this study proposes an in-situ measurement method based on visible-near infrared (VIS-NIR) spectroscopy to calculate and analyze the solid-liquid phase transformation process of metallic iron in the molten bath. Through theoretical derivation, the intrinsic correlation between the luminescence intensity of VIS-NIR spectra (during the melting and solidification of metallic iron) and the proportion coefficients of solid-phase and liquid-phase fractions in the molten bath was established. Additionally, a calculation method for determining the liquid-phase fraction proportion in the molten bath via VIS-NIR spectral luminescence intensity was developed, and corresponding experiments were designed to verify the feasibility and calculation accuracy of this method. Physical sciences/Materials science Physical sciences/Optics and photonics Physical sciences/Physics VIS-NIR spectroscopy Melting and solidification Infrared thermography Phase transition processes Image processing Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7485659","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":512856838,"identity":"916bb16c-60af-4dfd-b816-5fcbec5ebe26","order_by":0,"name":"Linghui Meng","email":"","orcid":"","institution":"University of Science and Technology Beijing","correspondingAuthor":false,"prefix":"","firstName":"Linghui","middleName":"","lastName":"Meng","suffix":""},{"id":512856839,"identity":"bfd4f744-820b-45c1-b83d-ff91cbb361a4","order_by":1,"name":"Kai 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Investigating its melting mechanism and detection methods is of great significance for optimizing smelting processes and enhancing resource utilization efficiency. Centering on the high-temperature self-luminescence characteristics of metallic iron\u0026mdash;the core component of scrap steel\u0026mdash;this study proposes an in-situ measurement method based on visible-near infrared (VIS-NIR) spectroscopy to calculate and analyze the solid-liquid phase transformation process of metallic iron in the molten bath. Through theoretical derivation, the intrinsic correlation between the luminescence intensity of VIS-NIR spectra (during the melting and solidification of metallic iron) and the proportion coefficients of solid-phase and liquid-phase fractions in the molten bath was established. 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