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:
Jan. 18, 1983
Filed:
Jan. 02, 1981
Paul Metz, Luxembourg, LU;
Francois Schleimer, Esch, LU;
Ferdinand Goedert, Esch, LU;
Lucien Lorang, Differdange, LU;
Romain Henrion, Esch, LU;
Jean-Claude Grosjean, Semecourt, FR;
Guy Denier, Metz, FR;
Claude Bauler, Carry-le-Rouet, FR;
Arbed S.A., Luxembourg, LU;
Irsid, Saint-Germain-en-Laye, FR;
Abstract
Process of refining of a metal bath in a crucible with oxygen blast at the top and crucible used. The invention consists essentially of providing in the bottom (15) of the crucible agitating gas injectors (15) located at least in a peripheral circular ring situated in immediate proximity to the refractory side wall. The injectors are preferably concentrated opposite the journals. Secondary injectors are, also preferably, provided in the bottom zone, intermediate between the ring and the center of the crucible. The invention makes it possible, in relation to the prior injection practice, to reduce the rate of dissolution of the agitating gas in the molten metal and then makes it possible to use a low-cost agitating gas, such as nitrogen, without risk of excessive nitridation of the bath.