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. 28, 1982
Filed:
Aug. 20, 1981
Walter Sieckman, Pittsburgh, PA (US);
Pennsylvania Engineering Corporation, Milwaukee, WI (US);
Abstract
A method of treating ferrous metal includes the steps of containing in a metallurgical vessel a quantity of ferrous metal which is at least partially solid in form, entraining finely divided carbon and a fluxing agent in a nonoxidizing gas and injecting the same in a first flow path and from beneath said metal, simultaneously injecting a first quantity of oxygen in a second flow path separate from said first flow path and beneath said metal for oxidizing the carbon to elevate the temperature of said metal. A second quantity of oxygen is injected into the metal in a third flow path and from above the metal for reducing the carbon content thereof. Additional fluxing agents may also be introduced from above the metal. After the desired metal temperature has been achieved, the delivery of carbon and fluxing agents through the first flow path is terminated while the flow of nonoxidizing gas is continued to promote mixing. The delivery of oxygen through the second and third flow paths is continued until the level of carbon in the metal has been reduced to a predetermined level.