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. 23, 2002
Filed:
Feb. 07, 2000
Mark Edwin Lunsford, Hoover, AL (US);
USX Corporation, Pittsburgh, PA (US);
Abstract
A method is provided for detecting the spalling off of a significant portion of buildup of alkali and/or metal from the refractory lining of a metallurgical furnace. The method includes monitoring the rate of change of temperature of the refractory lining at a plurality of spaced locations and determining when the rate of change of temperature at a predetermined number of such locations exceeds a first threshold level that a significant portion of buildup has spalled off. The invention is particularly applicable to blast furnaces and permits the addition of heat to be made to the molten metal in the furnace before the spalled off portion descends through the furnace shaft and reaches the molten metal.