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. 28, 2012
Filed:
May. 13, 2010
Katsumi Morikawa, Fukuoka, JP;
Akinari Sasaki, Fukuoka, JP;
Hiroshi Otsuka, Fukuoka, JP;
Yuichi Tsukaguchi, Osaka-fu, JP;
Katsumi Morikawa, Fukuoka, JP;
Akinari Sasaki, Fukuoka, JP;
Hiroshi Otsuka, Fukuoka, JP;
Yuichi Tsukaguchi, Osaka-fu, JP;
Krosakiharima Corporation, Fukuoka, JP;
Abstract
In an operation of continuous casting of steel grade such as aluminum-killed steel where a nozzle clogging phenomenon is particularly likely to occur, it is intended to prevent adhesion of inclusions (typically, AlO) on a nozzle used in the casting operation, and clogging of the nozzle due to the inclusions. A refractory materialis arranged to define a part or an entirety of a molten steel-contacting surface of a continuous casting nozzle, wherein the refractory materialcontains: a CaO component in an amount of 0.5 mass % or more; one or both of BOand RO (R is one selected from the group consisting of Na, K and Li) in an amount of 0.5 mass % or more; AlOin an amount of 50 mass % or more; and free carbon in an amount of 8.0 to 34.5 mass %, and wherein a total amount of CaO, BOand RO is in the range of 1.0 to 15.0 mass %, and a mass ratio of CaO/(BO+RO) is in the range of 0.1 to 3.0.