Method and device for producing slabs

US6626229B2 · kind B2 · utility

Assignee

• Mannesmann AG · DE

Inventors

• Ulrich Urlau · Moers, DE
• Hans-Jurgen Schemeit · Langenfeld, DE
• Gerhard Böcher · Salzgitter, DE
• Peter Muller · Woodside, US

Key dates

• Filing date: Dec 2, 1999
• Grant date: Sep 30, 2003
• Expiry date: Dec 2, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22D41/50
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for producing slabs having a thickness D>100 mm, at casting speeds v<3 m/min, in a continuous casting installation in which melt is supplied to a permanent mold from a storage reservoir via an immersion nozzle and from which, on the aperture side, a strand shell enclosing a liquid crater is withdrawn into a strand guidance frame, in particular a bow-type continuous casting installation. The melt supplied enters the permanent mold at a speed (vK) whose relationship with respect to the strand withdrawal speed (vB) is:vK:vB=6:1 to 60:1, andthe flow filaments of the melt supplied are guided in such a way that, with regard to the melt level, they penetrate into the liquid crater over a length L<2 m over a wide front and with a profile which is rectangular in cross section.