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:
Aug. 04, 1998
Filed:
Jan. 26, 1996
Hiroshi Okamoto, Okayama, JP;
Nobuyoshi Takashiba, Okayama, JP;
Kawasaki Steel Corporation, , JP;
Abstract
An oxygen blowing lance capable of directing oxygen jet streams onto a molten metal in an electric furnace, the lance being insertable into an electric furnace through a sidewall working port, the lance being positionable above the molten metal in the electric furnace. The lance includes a horizontal segment and an angled segment, the angled segment being positioned on the distal portion of the horizontal segment and being inclined relative to the horizontal segment. The lance also includes a tip, the tip being positioned on the distal portion of the angled segment, with the distal portion of the tip being directed toward the molten metal. The horizontal segment, the angled segment and the tip define an oxygen flow channel and a cooling water flow channel. The oxygen flow channel extends substantially the length of the lance, and the cooling water flow channel surrounds the oxygen flow channel. The lance also includes a plurality of nozzles, each having a throat portion having a throat diameter and an outlet portion having an outlet diameter, the throat portions of the nozzles being positioned on the distal portion of the tip. The nozzles are operatively engaged with the oxygen flow channel, and at least one of the nozzles is positioned nearer the molten metal than the other nozzles.