Abstract
Tons of waste is produced during iron steel’s industrial production, creating environmental pollution. This work aims to characterize the steel scale formed on the billet surface during the last step of steel production in the SIDERPERU steel plant. Scanning Electron Microscopy (SEM) shows stacked layers one above the other on steel billets scales surface. Energy Dispersive X-ray (EDX) and X-ray Fluorescence (XRF) reveal the high content of Fe and O, with Ca, Si, Mn, and Cr as minority elemental compounds. X-ray Diffraction (XRD) shows FeO, α-Fe2O3 and Fe3O4 as crystallographic phases. Magnetometry reveals Verwey transition and paramagnetic signals that screen the Morin transition. Mössbauer Spectroscopy at room temperature displays magnetic and non-magnetic parts. The non-magnetic part has the hyperfine parameters corresponding to predominant nonstoichiometric wustite. Octahedral (Fe+2/Fe3+) and tetrahedral Fe+3 hyperfine fields of 46.0 and 49.4 T values respectively are associated to nonstoichiometric magnetite and another sextet with a hyperfine field of 52.0 T is related to hematite.
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Acknowledgements
This work was supported by the CONCYTEC – World Bank – FONDECYT program “Incorporación de Investigadores”, Contract No. 12 -2019 – FONDECYT – BM – INC. INV. The authors are indebted to Mr. E. Hurtado Aguilar and Mr. R.H Cervantes Altuna for allowing the access to SiderPerú to collect the samples.
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This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2021), Brasov, Romania, 5-10 September 2021
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Borja-Castro, L.E., Bustamante Dominguez, A., Valerio-Cuadros, M.I. et al. Characterization of steel billet scales generated during the continuous casting process in SIDERPERU steel plant. Hyperfine Interact 242, 53 (2021). https://doi.org/10.1007/s10751-021-01778-8
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DOI: https://doi.org/10.1007/s10751-021-01778-8