Technologies for high-temperature batch annealing of grain-oriented electrical steel: An overview
Fatla O.M.H. Robinson F.C.J. Jweeg M.J. Beynon N. Valera-Medina A. Aljibori H.S.S. Mohammed M.N. Abdullah O.I.
1 January 2024Walter de Gruyter GmbH
Open Engineering
2024#14Issue 1
The production of grain-oriented, electrical steel consists of a series of processes that lead to a product with superior magnetic properties used in transformers due to the low core loss. The unique properties are gained during the process of secondary recrystallization and abnormal grain growth. The abnormal grain growth occurs during a process of special thermal treatment with careful control over the heating rate, pressure, and type of gas used as atmospheric pressure during the process. The process of thermal treatment is known as high-temperature annealing. Investigating of developing the process hardware is crucially important to sustain energy-efficient processes and to maintain excellent final product properties. This research presents an overview of the technology of high-temperature coil annealing (HTCA) furnaces used at Cogent Power Orb, UK. The research focuses on some specific details of running, managing, and controlling the operation of the HTCA furnaces during the annealing process. The research provides energy analysis of the annealing process at Cogent Power Orb. Different factors were examined to identify the main factors that contribute to the high energy consumption. Actual data were collected from the annealing furnace control system. The raw data were processed and analyzed carefully to examine different factors, namely, steel charge weight, furnace on-time, and furnace heating elements. The study focused then on one specific factor, namely, annealing cycle time, and investigated further the way that this factor affects the process energy consumption. It was found that one of the main reasons for the long cycle duration and the high energy consumption is the failure of the heating elements during the cycle. The research discussed the area of improvements in the process hardware with a particular focus on the furnace design and the potential of introducing convection currents to overcome failure in the heating elements and thus reduce the process on time.
analysis of energy consumption , annealing furnaces , electrical steel , energy efficiency , grain-oriented
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Department of Energy Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq
Mechanical Engineering Department, College of Engineering, Gulf University, Sanad, 26489, Bahrain
Department of Mechanics, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Faculty of Computing Engineering and Science, University of South Wales, Pontypridd, United Kingdom
College of Technical Engineering, Al-Farahidi University, Baghdad, 00965, Iraq
Manager Laboratories, Tata Steel Strip Products, Port Talbot, United Kingdom
School of Engineering, Cardiff University, Queens Buildings, Cardiff, United Kingdom
College of Engineering, University of Warith Al-Anbiyaa, Karbala, 56001, Iraq
Department of Energy Engineering
Mechanical Engineering Department
Department of Mechanics
Faculty of Computing Engineering and Science
College of Technical Engineering
Manager Laboratories
School of Engineering
College of Engineering
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