Authors: A. Sadri, G. Walters
International Symposium on Materials Degradation: Innovation, Inspection, Control and Rehabilitation
Abstract
The quality of refractory bricks and castables could be determined by direct measurements of their material properties such as elastic properties, porosity, density, etc. using conventional static or non-destructive (NDT) dynamic techniques. Quality monitoring of refractory linings is much more challenging anc complicated. The static methods require undesirable drilling and sample extractions from the furnace structure. A more desirable alternative is the use of NDT techniques for material quality estimation. The Acousto Ultrasonic-Echo (AU-E) technique is a new stress wave propagation appraoch for monitoring the quality of refractory linings in operating furnaces. In this paper, the conceptual methodology for the AU-E technique is described, as the capabilities and limitations are expanded, and the results from two case studies are discussed.
