Abstract: A method is disclosed for melting metals in a channel-type induction furnace which has a double channel-type unit with two inductors, each inductor being located at a separate magnetic core. The method consists of variable magnetic fluxes, which induce electric current in the channels of the channel unit being generated in the cores and a through flow of metal along the channels being created. This flow is provided by reducing the hydrodynamic turbulence at the outlet of the central channel, the phase shift between the magnetic fluxes being maintained at an angle less than 90 electrical degrees. The rate of the metal flow is adjusted by changing the phase shift angle during the course of melting.

Abstract: A channel-type induction furnace comprises a hearth for molten metal, at least one closed transformer core with a coil arranged thereabout and connected to a suitable source of alternating current, at least three channels communicating with the hearth and connected with one another through a horizontal channel, two tubular members each disposed in the hearth in a manner to adjoin the inlet opening of the lateral channel and formed of a non-conducting refractory material.

Abstract: The proposed method for checking the state of the lining of a melting unit consists of measuring the electric parameters of equal portions of the lining, located along the perimeter of the melting unit. This is followed by determining the arithmetic mean and the maximum value of these parameters and comparing the two. The result of the comparison is indicative of the state of the lining. According to the invention, the device for checking the state of the lining comprises electrodes which are uniformly installed on the lining along the perimeter of the melting unit. The electrodes are connected to the inputs of an information unit, which provides information about the state of the lining, as well as to the inputs of a maximum value unit for determining the maximum value of a parameter being measured. One output of the maximum value unit is connected to the first input of a comparison unit for comparing the maximum value and the arithmetic mean of the parameter being measured.