Valve element for sliding type valve joints on the outlet of vessels containing molten metal and process for making same

US4268016A · kind A · utility

Assignee

• Didier-Werke AG · DE

Inventors

• Axel Eschner · Wiesbaden, DE
• Hermann Leupold · Eltville am Rhein, DE
• Peter Jeschke · Eltville am Rhein, DE

Key dates

• Filing date: Jun 12, 1979
• Grant date: May 19, 1981
• Expiry date: Jun 12, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/6606
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An electrically heated valve element for sliding type valve joints in the outlet of a molten metal vessel has an electrical heating conductor disposed predominately in the outlet closing surface section of the valve element so that when moved to the casting position where the molten metal flow passage aligns with the flow passage from the vessel, the outlet closing surface of the element is maintained at a uniformly high temperature so that any cooling down of the outlet closing surface is avoided. The valve element is made by embedding the heating conductor which is air annealed nichrome wire in spiral form, into the refractory material of the valve element by vibration, the embedding mass being free of organic substances, carbon, sulfur, metallic iron, alkalies and/or electrically conductive substances.