Prediction of structural dynamics of the Electric Arc Furnace (EAF) is rather difficult, because of a number of phenomena occurring during the scrap melting process. Three large electrodes, corresponding to each phase of a AC circuit, are lowered by the main mast towards the scrap to activate the melting process, induced by the electric arc. Electric current fed to each electrode produces a strong magnetic field and applies an electromechanical force on the other electrodes. Arc voltage looks irregular upon time, even because of the scrap motion within the vessel and temperature growth. The vertical position of the mast is controlled by an hydraulic actuator. Nevertheless, a heavy vibration of the structures affects the regularity of the melting process. A fully coupled model of the whole system is herein proposed, through a multi-physics approach. A first analytical approach, describing the electric circuit of the whole system, is implemented into a Multi Body Dynamics (MBD) model of the EAF, while a reduced Finite Element Method (FEM) model of the flexible structures is used for a preliminary optimization of the design parameters. Electromechanical forces due to the mutual induction among the electrodes are computed and the dynamic response of the system is investigated. Proposed model allows a first refinement of the EAF design, although a complete experimental validation on the real machine has to be performed, in spite of problems due the extremely difficult accessibility of structures during the melting process.
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ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis
July 2–4, 2012
Nantes, France
Conference Sponsors:
- International
ISBN:
978-0-7918-4484-7
PROCEEDINGS PAPER
Electromechanical Coupled Response of the AC Electric Arc Furnace Structures During the Scrap Melting Process
Eugenio G. M. Brusa,
Eugenio G. M. Brusa
Politecnico di Torino, Torino, Italy
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Nicola Bosso,
Nicola Bosso
Politecnico di Torino, Torino, Italy
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Nicolò Zampieri,
Nicolò Zampieri
Politecnico di Torino, Torino, Italy
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Stefano Morsut,
Stefano Morsut
Danieli Officine Meccaniche, Buttrio, UD, Italy
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Maurizio Picciotto
Maurizio Picciotto
Danieli Officine Meccaniche, Buttrio, UD, Italy
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Eugenio G. M. Brusa
Politecnico di Torino, Torino, Italy
Nicola Bosso
Politecnico di Torino, Torino, Italy
Nicolò Zampieri
Politecnico di Torino, Torino, Italy
Stefano Morsut
Danieli Officine Meccaniche, Buttrio, UD, Italy
Maurizio Picciotto
Danieli Officine Meccaniche, Buttrio, UD, Italy
Paper No:
ESDA2012-82366, pp. 459-468; 10 pages
Published Online:
August 12, 2013
Citation
Brusa, EGM, Bosso, N, Zampieri, N, Morsut, S, & Picciotto, M. "Electromechanical Coupled Response of the AC Electric Arc Furnace Structures During the Scrap Melting Process." Proceedings of the ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. Volume 1: Advanced Computational Mechanics; Advanced Simulation-Based Engineering Sciences; Virtual and Augmented Reality; Applied Solid Mechanics and Material Processing; Dynamical Systems and Control. Nantes, France. July 2–4, 2012. pp. 459-468. ASME. https://doi.org/10.1115/ESDA2012-82366
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