MEASURING DEVICE FOR LEVEL OF MOLTEN STEEL IN CONTINUOUS CASTING MOLD

PURPOSE:To provide a titled measuring device for the level of molten steel which provides intended detection ability irrespectively of the presence of absence of an electromagnetic stirrer, by providing a gamma ray source and a scintillator for measuring the level of the molten steel both in a mold. CONSTITUTION:Partition plates 2, 3 consisting of steel plates constituting cooling water passages are provided on the outside of the inside walls 1 of an iron mold, and further outside walls 4 of the mold are provided on the outside. An electromagnetic stirrer 5 is provided in proximity to the outside wall 4. 6 is a mold cover. Molten steel is charged into the region enclosed by the assembled inside walls 1 in the above-mentioned constitution. A gamma ray source 7 such as 137Cs or the like is provided in proximity to the right wall 4 as against said stirrer and a scintillator 8 is provided as near the outside wall on the other side as possible. When the scintillator 3 receives a gamma ray, the same emits fluorescence. An optical fiber 9 is connected thereto in order to detect said fluorescence, and further a photomultiplier tube 10 connected to the fiber 9 is provided at a distance at which the multiplier does not receive any influence from the device 5. The level of the molten steel is measured from the electric signal obtd. with the tube 10 and the correlation between the predetermined level of the molten steel and a count rate.