Electromagnetic field and eddy currents in the mantle of the ore-smelting furnace

Abstract

Abstract Ore-smelting furnaces are the biggest and the most powerful furnaces in which the electric arc is used for converting electric energy into heat. Studying electromagnetic field in their structural components is one of instruments in energy saving developments. Since an ore-smelting furnace is a complex electrical device, we are forced to make assumptions, which would allow reducing the complex problem to a set of more simple analytical or numerical problems admitting not only quantitative but also qualitative solutions with acceptable accuracy. There is an approach when an electromagnetic problem is reduced to calculating an equivalent circuit that comprises both resistances and reactances. For calculating electromagnetic fields, cascade equivalent circuits are well-known in electro-mechanics. Particularly, cascade equivalent circuits of magneto-electric induction heating systems may be used as prototypes for qualitative calculating electromagnetic field and eddy currents in the mantle of the ore-smelting furnace. In the paper, qualitative calculating the resistance losses in the mantle of the ore-smelting furnace with such cascade equivalent circuit is offered.