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. 05, 2010
Filed:
Dec. 10, 2007
Koji Kido, Fukuoka, JP;
Joji Kurisu, Fukuoka, JP;
Arito Mizobe, Fukuoka, JP;
Hiroshi Otsuka, Fukuoka, JP;
Masahide Yoshida, Fukuoka, JP;
Koji Kido, Fukuoka, JP;
Joji Kurisu, Fukuoka, JP;
Arito Mizobe, Fukuoka, JP;
Hiroshi Otsuka, Fukuoka, JP;
Masahide Yoshida, Fukuoka, JP;
Krosakiharima Corporation, Fukuoka, JP;
Abstract
Disclosed is an immersion nozzle, which comprises a vertically-extending pipe-shaped straight nozzle bodyadapted to allow molten steel to pass downwardly from an inlet portprovided at an upper end thereof, and a pair of discharge portions each including a respective one of a pair of outlet portsprovided in a lower portion of the straight nozzle bodyin a bilaterally symmetrical arrangement and adapted to discharge molten steel laterally from a lateral side of the straight nozzle body. Each of the discharge portions has an inner surface defining the outlet portand extending parallel to an axis of the outlet portto define a length of the discharge portion at 45 mm or more. A ratio of S/Sis in the range of 0.8 to 1.8, wherein Sis a total transverse vertical cross-sectional area of the outlet ports, and Sis a cross-sectional area of an inner hole of the straight nozzle body taken along a plane including a line connecting respective inwardmost and uppermost positions of the outlet ports and extends perpendicularly to an axis of the straight nozzle body. The axis of the outlet port extends laterally outwardly and downwardly at the following angle θt with respect to a horizontal direction: 0°≦θt≦20°. The immersion nozzle of the present invention can suppress deceleration of a molten steel flow discharged from the outlet port to obtain a flow speed in an intended direction over a maximized distance.