Device for hot dip coating metal strands

Abstract

The invention relates to a device for hot dip coating metal strands (1), particularly strip steel, in which the metal strand (1) can be vertically guided through a reservoir (3), which accommodates the molten coating metal (2), and though a guide channel (4) connected upstream therefrom. An electromagnetic inductor (5) is mounted in the area of the guide channel (4) and in order to retain the coating metal (2) inside the reservoir (3), can induce induction currents in the coating metal (2) by means of an electromagnetic traveling field. While interacting with the electromagnetic traveling field, said induction currents exert an electromagnetic force. The inductor (5) has at least two main coils (6) that are arranged in succession in movement direction (X) of the metal strand (1), and has at least two correction coils (7) for controlling the position of the metal strand (1) inside the guide channel (4) in direction (N), which is normal to the surface of the metal strand (1). These correction coils are also arranged in succession in movement direction (X) of the metal strand (1). In order to improve the efficiency of the control of the metal strip inside the guide channel, the invention provides that at least a portion of the correction coils (7), when viewed in movement direction (X) of the metal strand (1), are arranged so that they are offset with regard to one another perpendicular to movement direction (X) and perpendicular to direction (N) that is normal to the surface of the metal strand (1).

Description

Technical field [0001] The invention relates to a device for hot-dip coating metal strips, especially steel strips. In this device, the metal strips can vertically pass through a container containing molten coating metal and pass through a front Guide channel. In this case, an electromagnetic sensor is provided in the guide channel, which can induce an induced current in the coated metal by means of an electromagnetic moving field to inhibit the coated metal in the blocking container. The electromagnetic moving field interacts to exert an electromagnetic force, wherein the inductor has at least two main coils, which are arranged in the direction of movement of the metal strip immediately before and after; the inductor also has at least two correction coils, It is used to adjust the position of the metal strip in the guide channel in a direction orthogonal to the surface of the metal strip, and these correction coils are also arranged in the direction of movement of the metal strip...

AI Technical Summary

Problems solved by technology

[0009] Coating of non-ferromagnetic metal strips is therefore possible, but with substantially ferromagnetic steel strips, the following problems arise: These strips are drawn ferromagnetically to the channel walls in electromagnetic seals, so that with surface damage

This reinforces the need for an efficient adjustment of the position of the metal strip in the guide channel, which is more difficult by the circumstances described above

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