METHOD FOR OPERATING A VACUUM MELTING SYSTEM, AND VACUUM MELTING SYSTEM OPERATED ACCORDING TO SAID METHOD

摘要

The invention relates to a method for operating a vacuum melting system for metallurgically treating molten steel and to a vacuum melting system operated according to said method. The acoustic signals generated in a ladle (6) which receives the molten steel are detected by means of at least one structure-borne noise detector (30-1, 30-2, 30-3, 30-4) which is directly or indirectly acoustically coupled to the ladle (6), and the acoustic signals are used to ascertain the height (H) or the thickness (d) of the foamed slag (18) which can be found in the ladle over the molten bath (14) of the molten steel.