Author: A. Sadri
CINDE Journal, vol. 29, no. 2, pp. 7-11, March - April 2008
Abstract
Hatch Technology’s Non-Destructive Testing (NDT) Group is using an innovative and proprietary technology to determine refractory brick and castable thickness and quality in various metallurgical vessels. In addition to thickness and quality determination, the acousto ultrasonicecho (AU-E) technique is capable of detecting cracks, metal penetration and delaminations within refractory linings, as the metallurgical furnaces are in operation. Having the system calibrated by the build-up and accretion materials it is capable of estimating their thickness, both on the sidewalls and at the bottom of the furnace hearth.
The intention of the present paper is to provide the readers with a brief introduction to refractory and castable AU-E NDT, and the capabilities of this new technique for condition monitoring of operating furnaces.
