Apparatus for the continuous hot-dip coating of metal strip

US9745653B2 · kind B2 · utility

Assignee

• ThyssenKrupp Steel Europe AG · DE

Inventors

• Norbert Schaffrath · Hamm, DE
• Thorsten Müller · Friedrichshafen, DE
• Friedhelm Macherey · Alpen, DE
• Gernot Nothacker · Dortmund, DE
• Tim Rübenstrunk · Dortmund, DE

Key dates

• Filing date: Apr 4, 2014
• Grant date: Aug 29, 2017
• Expiry date: Oct 25, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C2/523
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to an apparatus for the continuous hot-dip coating of metal strip, preferably steel strip, comprising a melting bath vessel, a snout, which opens in the melting bath vessel, for introducing a metal strip, which is heated in a continuous furnace, into the melting bath in protective gas, and a deflecting roller, which is arranged in the melting bath vessel, for deflecting the metal strip, which is entering the melting bath, in a direction pointing out of the melting bath, wherein that end of the snout which is dipped into the melting bath has at least one runoff chamber which is bounded inward by an overflow wall, downward by a floor and outward by the wall of the snout, wherein the overflow edge of the overflow wall lies at least in sections below the melting bath surface, and wherein a suction line with a pump is connected to the runoff chamber, characterized in that the runoff chamber is provided with at least one through opening through which liquid molten metal can flow out of the melting bath into the runoff chamber, wherein the at least one through opening is arranged lower than the overflow edge.