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:
Apr. 30, 1985
Filed:
Apr. 26, 1984
Applicant:
Inventors:
Joseph W Tommaney, Butler County, PA (US);
Harry L Bishop, Jr, Delmar, NY (US);
Assignee:
Allegheny Ludlum Steel Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21C / ; C21C / ;
U.S. Cl.
CPC ...
75 60 ; 75 59 ;
Abstract
A method for producing stainless steel in a top-blown molten metal vessel having a hot metal charge to form a bath. The method comprises top blowing from a lance oxygen and/or a mixture of oxygen and inert gas onto or beneath the surface of the bath while introducing a low flow rate inert gas to the bath from beneath the surface thereof during said top blowing. The ratio of oxygen-to-inert gas is decreased progressively during top blowing. The relative flow proportion of top-blown gases and bottom-blown gases remains substantially the same throughout the process.