University of Oulu

Pauna, H., Aula, M., Seehausen, J., Klung, J., Huttula, M. and Fabritius, T. (2020), Optical Emission Spectroscopy as an Online Analysis Method in Industrial Electric Arc Furnaces. steel research int., 91: 2000051.

Optical emission spectroscopy as an online analysis method in industrial electric arc furnaces

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Author: Pauna, Henri1; Aula, Matti1; Seehausen, Jonas2;
Organizations: 1Process Metallurgy Research Group, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
2Deutsche Edelstahlwerke, Obere Kaiserstraße, 57078 Siegen, Germany
3Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3 MB)
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Language: English
Published: John Wiley & Sons, 2020
Publish Date: 2020-09-11


The development of online analysis methods for industrial electric arc furnaces (EAFs) has been a major research topic in recent years. Process control becomes even more important in the future due to the increase in both the usage of recycled metal as charge material and the metal recycling rate. For the industry to keep up with the pace, reliable chemical analysis of the slag together with online information about the furnace operation status is essential. Herein, optical emission spectroscopy is used to obtain the information about the electric arc together with radiative properties and surface temperature of the molten bath in an industrial EAF. The arc is visible for high alloyed steel grades within 5–30 min before tapping and the arc spectra are dominated by the optical emissions from the slag components. The plasma properties of the electric arc are determined with emission lines from atomic chromium, iron, and calcium. The time evolution of the spectra for high alloyed and carbon steel grades are compared with each other to provide a better understanding of the differences in the spectra between these two steel grades.

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Series: Steel research international
ISSN: 1611-3683
ISSN-E: 1869-344X
ISSN-L: 1611-3683
Volume: 91
Issue: 11
Article number: 2000051
DOI: 10.1002/srin.202000051
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
215 Chemical engineering
Funding: We wish to acknowledge the support of Research Fund for Coal and Steel under grant agreement number 709923, Academy of Finland for Genome of Steel under grant number 311934, and Steel and Metal Producers’ Fund for 2019 and 2020 postgraduate grants.
Copyright information: © 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.