Dead-man temperature distribution measurement in a blast furnace by acoustic CT method

Tsutomu Okada, Morimasa Ichida, Hironao Yamaji, Kazuya Kunitomo, Mamoru Inoue, Ikuya Yamada, Kenji Yamane

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

A new sensor measuring two dimensional temperature distribution of the dead-man in a blast furnace has developed by using an acoustic wave CT method based on the theory that acoustic velocity in gas depends on a temperature. The features of a new measurement apparatus transmitting and receiving the acoustic wave which decreased to a great extent in packed bed is as follows. Shock wave is used in transmitter to generate acoustic wave with large acoustic pressure. Receiver has the good sensitivity for low frequency. Then, the least square method is adopted for computed tomography since the number of acoustic velocity data is limited. Relationship between temperature and acoustic velocity in a packed bed was obtained in off-line experiment. The measurement in an actual blast furnace was carried out during the scheduled shutdown. The acoustic wave was transmitted from a tuyere and the wave propagated through the furnace were received at some tuyeres. The temperature calculated by this method showed the decreasing tendency from side wall to the center of the blast furnace. An isothermal line of the temperature distribution had the possibility to show the shape of the dead-man. The temperature measured by this method was about 100 °C lower than that measured by thermocouple.

本文言語英語
ページ(範囲)850-855
ページ数6
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
84
12
DOI
出版ステータス出版済み - 1998
外部発表はい

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 物理化学および理論化学
  • 金属および合金
  • 材料化学

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