Molten steel temperature measurement method and molten steel temperature measurement device

摘要

An object of the present invention is to specify a surface level with high accuracy and to measure temperature at a predetermined immersion depth based on the surface level. A molten steel temperature measurement method according to the present invention is a molten steel temperature measurement method for measuring the temperature of molten steel in a molten steel pan 100, wherein a probe elevating device 7 measures temperature measuring probe 3 toward a molten metal melt surface MS. Lowering the temperature measuring probe 3, monitoring the driving current value of the probe lifting device 7 lowering the temperature measuring probe 3, and determining whether the change amount of the driving current value is equal to or more than a predetermined first threshold If it is determined that the temperature measuring probe 3 has reached the surface of the molten metal MS when the amount of change is equal to or greater than the first threshold value, the temperature measuring probe up to a predetermined immersion depth based on the height of the temperature measuring probe 3 And 3) lowering the temperature 3 and measuring the temperature of the molten steel by the temperature measurement probe 3. [Selected figure] Figure 1