SU705229A1 - Induction crucible furnace - Google Patents

Description

(54) INDUCTION BATTLE OVEN

I

The invention relates to the field of methane, allurgy, in particular, to induction crucible furnaces.

A well-known induction crucible furnace containing a crucible and an inductor is made. In the form of a vertical core of a refractory dielectric installed inside the crucible and concentrically eMyci: j, -

However, such a structure does not allow to obtain a high efficiency of the furnace.

The purpose of the invention is to increase the electric efficiency of the furnace

This is achieved due to the fact that the core is provided along the entire height of the Intonductor with a channel that connects its cones with the electrodes, and the lower end of the channel is connected to the plane of the crucibles.

The drawing shows the proposed oven, a longitudinal section.

The furnace consists of the crucible 1, the refractory cylinder 2 with the screw channel 3, the lower turn of which is in contact with the electrode 4, and the upper turn ends with a vertical bowl 5 having the electrode 6 and the power supply system.

In the bottom of the crucible 1, made of a refractory dielectric, lined electrode 4, made in the form of a circle of electrode material, such as graphite, and for fixing the cylinder 2, which protrudes above the bottom. Cylinder 2 is made of a refractory dielectric having sufficient mechanical strength with a minimum wall thickness between the channel and the surfaces of the cylinder. The ratio of the diameters of the cylinder and the crucible is determined from the condition of the most efficient heating of the metal by the internal and external magnetic fields. To give the cylinder stability, its base is made with thickening. The cross section of channel 3 is selected based on the optimum current density passing through the metal filling the channel. The wall thickness between the coils is made to the minimum permissible according to the conditions of mechanical strength. The height glass protrudes above the walls of the crucibles 1 to prevent short circuits when the crucible is filled to the brim with metal. The inner diameter of the glass must ensure reliable contact of the electrode with the filling station.