Apparatus for closing and/or regulating the tapping of molten metal

US5080265A · kind A · utility

Assignee

• Didier-Werke AG · DE

Inventors

• Ullrich Hintzen · Taunusstein, DE
• Ernst Luhrsen · Schlangenbad, DE
• Andreas Schuler · Lausanne, CH

Key dates

• Filing date: Oct 17, 1990
• Grant date: Jan 14, 1992
• Expiry date: Oct 17, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22D41/14
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A closing and/or regulating apparatus for tapping molten metal from the interior or a metallurgical vessel includes a vertical inner pipe having extending through a wall thereof at least one opening for the passage of molten metal. An outer pipe is fitted over the inner pipe and has extending through a wall thereof at least one opening. One of the pipes is to be mounted stationarily with respect to a metallurgical vessel, and the other of the pipes is displaceable relative to such one pipe in a vertical axial direction through a working stroke at which the openings of the pipes may be brought into alignment to thereby discharge molten metal downwardly through the interior of the inner pipe. The dimension of the opening in the stationary pipe in such direction is greater than the dimension of the opening in the displaceable pipe in such direction. The circumferential dimension of the opening in the displaceable pipe is substantially the same as the circumferential dimension of a lower portion of the opening in the stationary pipe.