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:
Sep. 12, 1978
Filed:
May. 02, 1977
British Steel Corporation, , GB;
Abstract
A method is provided for refining molten metal containing an impurity which is oxidizable in preference to one or more selected constituent elements of the metal and which forms a gaseous oxide, the method comprising injecting oxygen and a diluent gas into the molten metal contained in a vessel so as to reduce the proportion of the impurity in the metal by evolution as the gaseous oxide, weighing the vessel during refining to establish a point at which the weight of the vessel contents changes significantly due to preferential oxidation of the one or more selected constituent elements, initiating at the point a reduction in the ratio of oxygen: diluent gas to as to reduce the rate of oxidation of the one or more selected constituent elements relative to the impurity and continuing injection until the proportion of the impurity is reduced to the desired level.