Patent ID: 6375346
Filing Date: 2002-04-23
Classification: G01B

Abstract:
A method for detecting the spalling of a layer of buildup deposited on an interior surface of a refractory lining of a blast furnace shaft, said method comprising:a) monitoring the temperature of the refractory lining at a plurality of spaced locations in the shaft as a function of time; b) calculating a rate of change of the temperature of the refractory lining at each location as a function of time; c) establishing a first threshold level of the rate of change of the temperature of said refractory lining indicative of spalling of a portion of the layer of buildup from said lining; and d) determining that layer of buildup deposited on the interior surface of the refractory lining of the blast furnace has been spalled off when the rate of change of the temperature of said refactory lining of at least one of said locations exceeds said first threshold level.