Device for hot dip coating metal strands

US6929697B2 · kind B2 · utility

Assignee

• SMS DEMAG LLC · DE

Inventors

• Frank Bergmann · Magdeburg, DE
• Michael Zielenbach · Siegen, DE
• Walter Trakowski · Duisburg, DE
• Olaf Norman Jepsen · Siegen, DE
• Holger Behrens · Reutlingen, DE

Key dates

• Filing date: Feb 20, 2003
• Grant date: Aug 16, 2005
• Expiry date: Feb 20, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C2/24
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a device for hot dip coating metal strand (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 an electromagnetic traveling field. While interacting with the electromagnetic traveling field, the 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 provide…