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:
Mar. 06, 1984
Filed:
Dec. 09, 1982
Applicant:
Inventors:
Shozo Murakami, Kitakyushu, JP;
Hiroyuki Aoki, Kitakyushu, JP;
Saburo Matsuo, Kitakyushu, JP;
Eiji Ikezaki, Kitakyushu, JP;
Kenji Yamaura, Kitakyushu, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21B / ;
U.S. Cl.
CPC ...
266268 ; 266270 ; 138 42 ; 239553 ; 239590 ;
Abstract
The present invention relates to a concentric multi-tube-system nozzle situated beneath the surface of the melt in a refining vessel, especially a refining vessel for converting molten pig iron into steel. The stability and life of the concentric double-tube nozzle is the most crucial factor in carrying out refining in a bottom-blown converter. In accordance with the present invention, there is provided a concentric multi-tube-system nozzle situated beneath the surface of the melt in a refining vessel, comprising: