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:
May. 11, 1976
Filed:
May. 20, 1974
John MacNamara, Sault Ste. Marie, CA;
The Algoma Steel Corporation, Limited, Sault Ste. Marie, CA;
Abstract
The treatment, preferably sulphide modification of molten steel in the ladle, which treatment is effected by the addition of an agent which is normally highly reactive to oxygen, such as rare earth metal compounds, particularly rare earth metal silicides, thereto after a desired amount of deoxidation of the molten steel has taken place, preferably after substantially complete deoxidation of said molten steel in which addition agent is enclosed in at least one metal, preferably steel container suspended in the molten steel in the ladle such that at least that portion of the container containing the addition agent is disposed below the surface of the molten steel in the ladle whereby the addition agent is distributed into the molten steel on melting of the walls of the container, the thickness of the walls of the container being selected to provide the required delay in the introduction of the addition agent in said steel for the desired amount of deoxidation of the steel to have taken place in the ladle.