SU667784A1 - Induction channel furnace - Google Patents

Description

(54) INDUCTION KEYNALNEG LIFE

one

The invention relates to non-ferrous metallurgy and is intended for use in the preparation of non-ferrous metal alloys.

The known induction channel furnace T includes a tank for metal, connected vertical channels connected to each other, a horizontal channel, magnetic circuits with windings closed around lateral vertical channels with windings, an open magnetic circuit with windings at the poles located under the horizontal channel, and a drain pipe 1.

The design features of the known furnace exclude the possibility of using porous stuffed plaster and fiber refractories with high resistance for the manufacture of channels. This is due to the fact that during the operation of the furnace in the metal in the channels, vortices occur with areas of reduced pressure, which leads to air leaks through the pores of the lining.

The proposed furnace eliminates the gas saturation of the metal when the channels are made of porous materials. This is achieved by the fact that the poles of an open magnetic circuit are placed below the horizontal nMm Channel between the zeitral and lateral BbiiwH vertical channels, with the ends of the horizontal channel being 5 circles each with the center T of the horizontal axes of the side vertical channels and the width of the horizontal channel is 2-4 diameters side vertical channels.

FIG. 1 shows the proposed furnace, longitudinal section; in fig. 2 is the same; section A-A in FIG. one.

The furnace includes a tank 1 for metal, side vertical channels 2, a central vertical channel 3, a horizontal channel 4, closed magnetic cores 5 with windings 6, an open magnetic circuit 7 with windings 8, and a drain pipe 9.

Claims (2)

Induction channel furnace has two modes of operation: the preparation of the alloy and casting. When operating in the alloy preparation mode, the drain pipe 9 is removed. The windings 6 closed by the magnetic core 5 are connected to the AC network. In this case, two switching modes are possible: the first is with the closure of secondary secondary current flowing through the metal through the side and central vertical channels 2 and 3, and the second with current closing only through the side vertical channels 2. These modes differ in the power supplied to the metal. To circulate the metal through the channels and use the alternating current network to turn on the windings 8 of the open magnetic circuit 7. At the same time, in the areas of the horizontal channel 4 located in the zone of the magnetic field created by the poles of the open magnetic circuit 7, RaeT has an electromagnetic force perpendicular to the perpendicular straight to the axis of the horizontal channel 4, i.e. in its wall. The metal current flows along the wall of the horizontal channel 4, divided into two parts; one part of the flow is directed toward the central vertical channel 3, the other toward the side vertical channel 2. Part of the flow directed towards the side vertical channel 2; it goes around the rounded end of the horizontal channel 4 and returns towards the central vertical channel 3. Thus, in the horizontal channel 4 vortices are created, in the center of which are the side vertical channels 2. The metal is sucked through the side vertical channels 2 and is ejected through the central vertical channel. channel 3 into the tank 1. The intensity of metal circulation along the channels is regulated by the current in the windings 8 times at the time of the magnetic core 7. In the metal casting mode, the drain pipe 9 is docked to the mouth of the central vertical channel 3. The windings 6 of the closed magnetic cores b are turned on so that the current is closed along the side of the vertical L KG 2. When the windings 8 of the open magnetodiode 7 are turned on in the alternating current network, electromagnetic forces arise that create an increased pressure zone in the horizontal channel 4 and move the metal towards the central vertical channel 3 and further into the drain pipe 9. When the furnace operates, the vortex centers in the horizontal channel 4 connected to the metal in the side vertical channels 2, and therefore the pressure at these points exceeds the atmospheric to the height of the metal column above the horizontal channel 4, and through the center of the vortices occurs dsos metal in the core, the aspiration of atmospheric air is impossible. The resulting vortices in the sections of the horizontal channel 4, adjacent to the central vertical channel 3, also cannot draw air through the lining, since, in addition to the atmospheric and metalostatic pressure, the electromagnetic pressure also acts in this area. The elimination of the possibility of air leaks allows the use of porous rammed and fibrous refractory materials with high durability for the manufacture of channels, without degrading the quality of the metal. The invention of induction channel furnace, comprising a container for metal, connected with it vertical channels connected by a horizontal channel, closed Tbie around the side vertical channels of the magnetic cores with windings, an open magnetic circuit with windings at the poles, located under the horizontal channel, and a removable drain pipe, characterized in that, in order to eliminate the gas saturation of the metal in the manufacture of channels of porous materials, the poles of an open magnetic circuit are located under the horizontal ntalnym channel between the central and side vertical channels, the ends of the horizontal channel formed along the circumference with the center at the points of intersection of the side vertical channels with horizontal and Schirin horizontal channel 2-4 is diameter-side vertical channels. Information sources taken into account during the examination 1. USSR Copyright Certificate No. 288183, cl. H 05 B 18/02, 1974. needles ig.2