ABSTRACT

A stave cooling system is a key element in the blast furnace which protects the outer shell from heat by providing uniform cooling. Real-time condition assessment of staves is essential to understand the wear mechanism of staves. Inspection rod/waveguide of known length which is made of copper was inserted through the steel shell till the inner end of the stave where the waveguide is susceptible to reduce in length as stave erodes with time. FEM analysis was done to find the ultrasonic parameters and lab-scale trials were taken on artificial waveguides with different end conditions. Based on the results, an ultrasonic-based real-time thickness measurement system was developed to continuously measure the length of the inspection rod/waveguide which eventually represents the stave thickness. System was installed in the plant, the data was captured and shown for 60 days from the date of the installation with an accuracy of more than 98%.

摘要

冷却壁系统是高炉中的关键元件，它通过提供均匀的冷却来保护外壳免受热量的影响。板条的实时状态评估对于了解板条的磨损机制至关重要。由铜制成的已知长度的检查棒/波导穿过钢壳插入到板条的内端，在该处波导容易随着板条的侵蚀而缩短长度。进行了有限元分析以找到超声波参数，并对具有不同末端条件的人造波导进行了实验室规模的试验。根据结果​​，开发了一种基于超声波的实时厚度测量系统，用于连续测量最终代表板条厚度的检验棒/波导的长度。系统安装在工厂，