Nosov Magnitogorsk State Technical University (Magnitogorsk, Russia)

A. A. Nikolaev, Cand. Eng., Head of the Dept. of Automatic Electric Drive and Mechatronics, aa.nikolaev@magtu.ru
P. G. Tulupov, Cand. Eng., Associate Prof., Dept. of Automatic Electric Drive and Mechatronics, tulupov.pg@mail.ru
M. V. Bulanov, Cand. Eng., Associate Prof., Dept. of Automatic Electric Drive and Mechatronics, bulanov.m.v@gmail.com
P. I. Svyatkin, Postgraduate Student, Dept. of Automatic Electric Drive and Mechatronics, svyatkin_p@mail.ru

The paper describes the measures taken to improve energy efficiency of a 120-t modular-type electric arc furnace (EAF) and a furnace transformer with a rated capacity of 95 MVA. The first measure involved adjusting the automatic control system parameters for the electrical mode and electrode movement to reduce the static regulation error and improve dynamic performance of the control quality. The second measure was aimed at developing and studying an algorithm for automatic switching of the furnace transformer tap positions and operating curves using separate melting profiles for combinations of weight of the solid charge and hot metal. Upon implementation of these measures, we have assessed how they influenced the resulting energy efficiency of the EAF, and drawn the conclusions that the developed algorithms are universal and can be implemented on other modular-type arc steelmaking furnaces of different capacities.

The research was funded by the Ministry of Science and Higher Education of the Russian Federation (project No. FZRU-2023-0008).

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