DOI: https://doi.org/10.15407/publishing2017.48.105

THE INFLUENCE OF STRUCTURAL ELEMENTS OF MELTING FURNACE ON EFFICIENCY OF VERSATILE ELECTROMAGNETIC STIRRER OF LIQUID METAL

O.I. Bondar, O.I. Glukhenkyi, Y.M. Goryslavets
Institute of Electrodynamics of the National Academy of Sciences of Ukraine,
Peremohy, 56, Kyiv-57, 03680, Ukraine,
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With the help of numerical modelling of electromagnetic processes in system “versatile inductor – liquid metal” the influence of structural elements of reflection furnace for aluminum on efficiency of versatile electromagnetic stirrer of liquid metal that alternatively creates travelling and pulsing magnetic fields have been determined. On the example of versatile three core inductor, attached to the side wall of furnace, the influence of ferromagnetic plating of furnace and metal nonmagnetic pocket of stirrer was investigated. Estimation of influence of such elements performed by the way of determining and comparison integral electromagnetic forces and heat power in liquid metal. As a result of 3D modelling it was found that influence of ferromagnetic plating of furnace is insignificant (not exceed 10 %) and it can be neglected. In the presence of metal pocket between inductor and liquid metal the efficiency of stirring may be reduced to 15%. At the same time there are significant electrical losses in pocket which could exceed heat power in liquid metal. It is shown that such losses and also influence of pocket on efficiency of stirring can be significantly reduced with the help of sectioning (performing of cuts) of metal pocket, and also by reducing of frequency of power supply of versatile stirrer. References 6, figures 4.
Key words: electromagnetic stirring, liquid metal, versatile inductor, structural elements of furnace, numerical modelling.

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