Cooling of a metal strip using a position-controlled valve device

US10722929B2 · kind B2 · utility

Assignee

• Primetals Technologies Austria GmbH · AT

Inventors

• Jian Chen · Chiayi, TW
• Sieglinde Ehgartner · Linz, AT
• Reinhard Karl · Klosterneuburg, AT
• Erich Opitz · Frauenkirchen, AT
• Florian Poeschl · Linz, AT
• Alois Seilinger · Linz, AT
• Thomas Trickl · Koppl, AT

Key dates

• Filing date: Feb 7, 2014
• Grant date: Jul 28, 2020
• Expiry date: Dec 15, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D1/667
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

To cool a metal strip (1), liquid coolant (5) is supplied to the strip by a supply device (9) from a feed line (10). A valve (13) in the feed line (10) sets the valve (13) to a respective opening position (s) for adjusting the coolant flow (F) to the metal strip (1) per unit of time. An upstream condition detection device (14) upstream of the valve device (13) in the feed line (10) detects an upstream condition (ZV) of the coolant (5). A control unit (6) determines a set point (s*) for an opening position (s) of the valve device (13) corresponding to the set point (F*) for the coolant flow (F) based on a set point (F*) for the coolant flow (F*), the upstream condition (ZV) of the coolant (5) and a valve characteristic (C) of the valve device (13). The valve characteristic (C) follows a characteristic curve (K) of the coolant flow (F) as a function of the opening position (s) of the valve device (13), relative to a reference condition (ZR) of the coolant (5) upstream of the valve device (13) in the feed line (10). The control unit (6) sets the opening position (s) of the valve device (13) according to the set point (s*) that has been determined.