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:
Jun. 30, 2015
Filed:
Aug. 08, 2012
Satoshi Kinoshiro, Kawasaki, JP;
Kyoko Fujimoto, Chiba, JP;
Masao Inose, Chiba, JP;
Toshiyuki Ito, Kawasaki, JP;
Satoshi Kinoshiro, Kawasaki, JP;
Kyoko Fujimoto, Chiba, JP;
Masao Inose, Chiba, JP;
Toshiyuki Ito, Kawasaki, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
In a method for desulfurizing hot metal by analyzing S concentration of a sample taken out from the hot metal, the S concentration is analyzed rapidly and precisely by a method comprising a high frequency induction heating step of oxidizing the sample under a high frequency induction heating in a pure oxygen atmosphere to convert S in the hot metal to SOand an analysis step of analyzing SO-containing gas generated in the high frequency induction heating step through an ultraviolet fluorescence method to quantify S concentration in the sample, whereby S concentration after the desulfurization is controlled precisely and hence fault of S concentration is prevented but also the increase of the cost due to the excessive addition of a desulfurization agent and step disruption at steel-making step are prevented.