Immersion nozzles for metal melts

US5171495A · kind A · utility

Assignee

• Didier-Werke AG · DE

Inventors

• Ernst Luhrsen · Schlangenbad, DE
• Albert Ott · Niedernhausen, DE

Key dates

• Filing date: Oct 11, 1991
• Grant date: Dec 15, 1992
• Expiry date: Oct 11, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B35/66
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A refractory immersion nozzle which can be used for processing metal melts, and a process for producing the nozzle by providing a mixture containing alumina having a maximum grain size of 250 microns, an aggregate having less tendency than alumina to form incrustations during use of the nozzle, boron nitride, a fluxing agent, a bonding agent and a mixing liquid, molding the mixture to form a shaped body, and drying the shaped body. The nozzle inhibits accretion of slag constituents from the metal melts, and has sufficiently good spalling resistance.