PURPOSE: To enable quick and exact quantitative detection of a slag level by providing plural magnetic field generating coils are receiving coils horizontally and stepwise so as to face each other to the wall of a converter and measuring continuously the current values of the magnetic fields generated in the converter.
CONSTITUTION: The magnetic field generating coils 4aW4c parted from each other at prescribed spacings are embedded horizontally in multiple stages to one side of the wall 1a of the converter 1 above the surface of a molten steel 2. The receiving coils 6aW6c are embedded horizontally in multiple stages to the other side of the wall 1a so as to face the coils 4aW4c. ACs are supplied from respective power sources 5aW5c to the magnetic field generating coils 4aW4c constituted in the above-mentioned manner to generate the magnetic fields A, B, C. The magnetic fields A, B, C are continuously measured by the receiving coils 6aW6c opposite to said coils and are displayed on ammeters 8aW8c via amplifiers 7aW7c. The current values of the magnetic fields C, B, A change successively when the foaming of the slag 3 in the converter 1 progresses. The slag level in the converter 1 is thus exactly detected and slopping is prevented.
HIRANO MINORU
MIYAHARA HIROAKI
ISHIKAWA HIROAKI
