Non-Destructive Testing (NDT) and Inspection of the Blast Furnace Refractory Lining by Stress Wave Propagation Technique
Generally speaking, a blast furnace is the main equipment in Ironmaking and the campaign life of a blast furnace depends on its remaining hearth refractory lining 1. The Acousto Ultrasonic-Echo (AU-E) is a stress wave propagation technique that uses time and frequency data analysis to determine coarse-grained material thicknesses, such as refractory and stave materials in operating blast furnaces. A mechanical impact on the surface of the structure (via a hammer or a mechanical impactor) generates a stress pulse, propagating into the furnace layers. The wave is partially reflected by the change in refractory layer properties, but the main pulse propagates through the solid refractory layers until its energy dissipates. The signal is mainly reflected by the refractory/molten metal interface, or alternatively by the build up/air or molten metal interfaces that are formed between internal layers or at external boundaries. In this paper, we describe the AU-E technique in details and demonstrate a few results that are indicative of the technique reliability and accuracy.
non-destructive testing (NDT) acousto ultrasonic-echo (AU-E) blast furnace inspection refractory wear hearth refractory profile taphole inspection cracks and discontinuities in refractory lining
Sadri Afshin Gebski Pawel
Hatch Ltd., 2800 Speakman Dr., Sheridan Science & Technology Park, Mississauga, Ontario, Canada L5K 2R7
国际会议
The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)
上海
英文
955-959
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）