Comparing the Accuracy of Acousto Ultrasonic-Echo (NDT), Finite Element Analysis (FEA), and Drilling When Obtaining a Blast Furnace Refractory Lining Wear Profile

摘要

Metal processing vessels, regardless of the process type and dimensions, require inner insulator protection in the form of heat-resistant composite ceramics or refractory materials. In blast furnace hearths, carbon and graphite refractory are used in the construction lining, and spray or stave cooling is used as an external hearth cooling mechanism. Refractory wear in the hearth region is caused mainly by either one of or a combination of the following reactions: oxidation, zinc and alkali reaction, hot metal and slag attack, and/or temperature fluctuation. Excessive refractory deterioration is one of the main causes of premature termination of a blast furnace campaign.