METHOD FOR MEASURING MOLTEN STEEL TEMPERATURE UNDER REDUCED PRESSURE

• Main Authors: INOUE TADAHIRO, INOUE NOBORU, OGASAWARA TOMOYOSHI, KUROYANAGI SHIMPEI, NISHIYAMA YUHEI, KATO TOSHIO, NAKAI YOSHIE
• Format: Patent
• Language: English; Japanese
• Published: 18.02.2022
• Subjects: CHEMISTRY; COLORIMETRY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; METALLURGY; METALLURGY OF IRON; PHYSICS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; RADIATION PYROMETRY; TESTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

To suppress deterioration of temperature measurement accuracy due to changes in pressure in a vacuum chamber when measuring, with a dichroic thermometer, continuously the temperature of molten steel in the vacuum chamber of refining facility that refines the molten steel under reduced pressure.SOLUTION: A method for measuring a temperature of molten steel under reduced pressure according to the present invention continuously measures the temperature of a molten steel 3 in a vacuum chamber 5 of a refining facility 1 that refines the molten steel under reduced pressure, using a dichroic thermometer 14 whose wavelength used for the temperature measurement is changed according to an atmospheric pressure in the vacuum chamber.SELECTED DRAWING: Figure 1 【課題】 減圧下で溶鋼を精錬する精錬設備の真空槽内の溶鋼の温度を２色温度計で連続測定するにあたり、真空槽内の圧力の変化に起因する温度測定精度の低下を抑制する。【解決手段】 本発明に係る減圧下における溶鋼温度の測定方法は、減圧下で溶鋼を精錬する精錬設備１の真空槽５内の溶鋼３の温度を２色温度計１４で連続測定する、減圧下における溶鋼温度の測定方法であって、前記真空槽内の雰囲気圧力に応じて、前記２色温度計の温度測定に使用する波長を変更する。【選択図】 図１