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. 21, 1987
Filed:
Nov. 21, 1985
William G Wilson, Pittsburgh, PA (US);
Other;
Abstract
A method is provided for removing sulfur and hydrogen from steel by the steps of pouring a stream of steel, low in oxygen and free of slag into a vertical tube installed in a ladle which extends from the bottom of the ladle to the top of the ladle, providing a means to introduce a flow of inert gas into the bottom of the tube to provide a stirring action within the tube, adding a lime based slag with a large capacity to absorb sulfur into the tube; adding ferro-alloys and metals into the tube which are known to enhance desulfurization and are necessary to achieve the specified composition of the steel; utilizing the stream of inert gas introduced into the bottom of the tube as a means for hydrogen removal.