The Efficiency of Design Solutions of the Current Supply during Modernization of an Ore-Thermal Furnace

The experience of designing a secondary current supply for an ore recovery furnace with a round tub designed to replace a furnace with a rectangular tub is considered. At the same time, the power supply has far from exhausted its working life, and its replacement was not expected. Traditional design solutions for a short network of a round ore recovery furnace, providing a satisfactory level of its electrical parameters, involve the use of a secondary current supply circuit “triangle on electrodes.” The dismantled furnace had a “star on transformer” secondary current supply circuit. New design solutions have been developed based on the general physical laws of the formation of the electromagnetic field of a system of conductors with currents. Their use provided a sufficiently high level of input active power, which also made it possible to reduce the asymmetry of the inductive resistance of the secondary current supply from 58 to 10% compared with the old furnace. The study used the method of numerical modeling in specialized ANSYS software with the integration of a geometric model from a computer-aided design system.