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:
Nov. 12, 1985
Filed:
Nov. 26, 1984
Applicant:
Inventors:
Hirohisa Nakashima, Fukuyama, JP;
Yoshimi Komatsu, Fukuyama, JP;
Masafumi Ikeda, Fukuyama, JP;
Tsuneo Kondo, Fukuyama, JP;
Assignee:
Nippon Kokan Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
75 12 ; 75 593 ;
Abstract
The invention relates to a method of operating a ladle refining furnace for blowing Ar gas through bubbling lances submerged in molten steel in a ladle to stir the molten steel. The flow rate and the rate of change in the flow rate of the Ar gas blown through the bubbling lances are adjusted to prevent the iron lumps from attaching to the bubbling lances.