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:
Dec. 24, 1985
Filed:
Sep. 24, 1984
Nippon Steel Corporation, Tokyo, JP;
Abstract
The refining of chromium-containing molten steel by the treatments of decarburization, reduction, and desulfurization is improved in terms of consumption of argon gas used for blowing molten steel, amount of refractories of an AOD furnace, and CaO and CaF.sub.2, etc. by a process which comprises adding to the slag existing after completion of the decarburization, metallic Al as a reducing agent and CaO as a slag-forming agent respectively in amounts necessary for the slag, after completion of the subsequent reduction, to acquire a SiO.sub.2 content of not more than 10% and a CaO/Al.sub.2 O.sub.3 ratio in the range of 0.8 to 2.0, thereby enabling the treatments of reduction and desulfurization to proceed simultaneously.