University of Oulu

H. Pauna, M. Aula, S. Kaukonen, M. Huttula, & T. Fabritius (2022) Optical emission spectroscopy as a tool for process control of steelmaking burners. In 8th International Congress on the Science and Technology of Steelmaking (pp. 186-193). Association for Iron and Steel Technology.

Optical emission spectroscopy as a tool for process control of steelmaking burners

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Author: Pauna, Henri1; Aula, Matti2; Kaukonen, S.3;
Organizations: 1Process Metallurgy Research Unit, University of Oulu, Pentti Kaiteran katu 1, P.O. Box 4300, FI-90014 Oulu, Finland
2Luxmet Ltd, Paavo Havaksen Tie 5 D, FI-90570 Oulu, Finland
3Sapotech Ltd, Paavo Havaksen Tie 5 D, FI-90570 Oulu, Finland
4Nano and Molecular Systems Research Unit, University of Oulu, Pentti Kaiteran katu 1, P.O. Box 3000, FI-90014 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2022102062670
Language: English
Published: Association for Iron and Steel Technology, 2022
Publish Date: 2022-10-20
Description:

Abstract

In contemporary steelmaking, burners are widely used for heating slabs in walking beam and annealing furnaces, heat-up of empty ladles, flame cutting of steel, as well as providing additional energy in electric arc furnaces. To facilitate the future of carbon-neutral steelmaking, a transition from natural gas-based burners toward hydrogen-based burners is essential to reduce the CO2 emissions associated with the burners. In addition to this transition, it is important also to optimize the burner practices that are used today, since the transition will take its time. To this end, CO2 reductions could also be realized with process control aiming toward more efficient use of energy and gas resources. This study presents how optical emission spectroscopy could be used for on-line monitoring and process control of the burner flame. A case study of oxy-fuel cutting is presented, where optical emissions from H2O, C2, FeO, Na, and K together with thermal radiation were observed. The flame’s properties, such as temperature and radiative heat transfer, identification of the flame species and impurities, and detection of rapid changes in the flame are analyzed from the OES data.

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Pages: 186 - 193
Article number: PR-531-019
Host publication: 8th International Congress on the Science and Technology of Steelmaking
Conference: International Congress on the Science and Technology of Steelmaking
Type of Publication: B3 Article in conference proceedings
Field of Science: 114 Physical sciences
215 Chemical engineering
Subjects:
Funding: This work was supported by the Academy of Finland under the Genome of Steel grant No. 311934 and Business Finland’s Towards Fossil-free Steel (FFS) research program, grant number 45774/31/2020.
Academy of Finland Grant Number: 311934
Detailed Information: 311934 (Academy of Finland Funding decision)
Copyright information: © 2022 by the Association for Iron & Steel Technology. Published in this repository with the kind permission of the publisher.