Device and method for improved extraction of metal vapor

US10689742B2 · kind B2 · utility

Assignees

• ThyssenKrupp Steel Europe AG · DE
• thyssenkrupp AG · DE

Inventors

• Sridhar Palepu · Duisburg, DE
• Michael Peters · Kleve, DE
• Norbert Schaffrath · Hamm, DE
• Sabine Zeizinger · Mülheim, DE

Key dates

• Filing date: May 20, 2016
• Grant date: Jun 23, 2020
• Expiry date: Jul 11, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C2/40
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A device minimizes or eliminates surface flaws caused by metal dust on a metal strip to be coated in a continuous hot-dip coating process, where at least some segments of the metal strip to be coated are conveyed through the device in an axial direction. The device may comprise a blowing/sucking unit with blow-in openings for applying protective gas to the metal strip, which blow-in openings are positionable on first and second sides of the metal strip. The blowing/sucking unit may further include suction openings for extracting protective gas laden with metal vapor and/or metal dust, which suction openings are positionable on the first and second sides of the metal strip. The blowing/sucking unit may have a blow-in region in which the blow-in openings are arranged, and a suction region downstream of the blow-in region in which the suction openings are arranged.