The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1992
Filed:
Oct. 11, 1991
Applicant:
Inventors:
Ernst Luhrsen, Bad Schwalbach, DE;
Albert Ott, Waldems-Wustems, DE;
Assignee:
Didier-Werke AG, Wiesbaden, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 63 ; 264109 ; 501 89 ; 501 98 ;
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.