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The purpose of this project was to promote a working practice of EAF that enhances control of the scrap melting process and minimises the intermediate stops and the idle time.

CRM developed an original optical device able to give a direct visualisation of the scrap behaviour inside the vessel. A system consisting of an IR camera coupled with an adapted endoscope was installed inside a burner, allowing the follow-up of the entire melting process. Results are very promising; the industrial application requires improving the reliability of the system.

ProfilArbed investigated possibilities for optimising energy inputs and reducing power-on time. The efficiency of natural gas burners was studied, to optimise their capacity for substituting part of the electric energy input. A model was developed for end-of-heat prediction and, finally, the impact of all modifications and changes in the operating practice was studied.

IRSID�s objective was to reduce the costs and the risks associated with the electromechanical equipment diagnosis. The artificial intelligence domain techniques were used and refractory roof wear was chosen as the modelling subject. The developed feasibility prototype has the advantage of structuring the presentation of a set of signals useful for studying a given problem.

Refractory costs were estimated and optimised by Imatra Steel. Two sets of production data and process signals were collected and analysed. Several data analysing methods to find an optimal estimation procedure were used. Finally, statistical, artificial neural networks and experimental models are developed and compared. Estimated and real refractory costs are also studied.

Additional information

Authors: TERHO K, Imatra Steel Oy AB, Imatra (FI);BAUMERT J C, ProfilArbed Recherches - Groupe Arcelor, Esch-sur-Alzette (LU);ENGEL R, ProfilArbed Recherches - Groupe Arcelor, Esch-sur-Alzette (LU);HOFFMANN J, ProfilArbed Recherches - Groupe Arcelor, Esch-sur-Alzette (LU);MATHY C, CRM - Centre de recherches métallurgiques, Liège (BE);CHOUVET M P, IRSID - Groupe Arcelor, Maizières-lès-Metz (FR);LE COQ X, IRSID - Groupe Arcelor, Maizières-lès-Metz (FR)
Bibliographic Reference: EUR 20895 EN (2003), 143pp. Euro: 25
Availability: EUR-OP reference: KI-NA-20895-EN-S Available from EUR-OP sales agents URL:
ISBN: ISBN: 92-894-6377-4
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