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:
Apr. 16, 2024
Filed:
Apr. 02, 2020
Jfe Steel Corporation, Tokyo, JP;
Yumi Murakami, Tokyo, JP;
Nobuhiko Oda, Tokyo, JP;
Yusuke Fujii, Tokyo, JP;
Goro Okuyama, Tokyo, JP;
Shota Amano, Tokyo, JP;
Shinji Koseki, Tokyo, JP;
Shingo Sato, Tokyo, JP;
Yukio Takahashi, Tokyo, JP;
Ryo Kawabata, Tokyo, JP;
Naoki Kikuchi, Tokyo, JP;
Atsuo Yuasa, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
A top-blowing lance nozzle is configured to freely switch an adequate expansion condition so as to control an oxygen-blowing amount and a jetting velocity independently of each other without requiring a plurality of lance nozzles or a mechanically movable part. A lance nozzle is configured to blow refining oxygen to molten iron charged in a reaction vessel while a gas is blown from a top-blowing lance to the molten iron. One or more blowing holes for blowing a working gas are on an inner wall side surface of the nozzle, at a site where the lance nozzle has a minimum cross-sectional area in a nozzle axis direction or at a neighboring site of the site.