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:
Jul. 19, 1983
Filed:
Nov. 30, 1981
Applicant:
Inventors:
Shingo Satoh, Muroran, JP;
Takashi Inoue, Muroran, JP;
Minoru Naki, Muroran, JP;
Yuji Kawauchi, Muroran, JP;
Assignee:
Nippon Steel Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
75 60 ; 75 59 ;
Abstract
The present invention provides a method for preliminary treatment of molten iron from a blast furnace wherein only desiliconization of the iron is effected. Gaseous oxygen is injected into the molten iron by controlling its supply rate depending on the Si content of the molten iron in such a manner that said rate is increased if the Si content of the iron is high and decreased if the Si content is low.