Molten steel thermometry manner null inside tundish for continuous casting

摘要

PURPOSE: To measure molten steel temperature in an tundish by inserting a molybdenum electrode in a molten steel in the tundish, forming a thermocouple by the electrode and a iron material a part of which makes contact with the molten steel in the tundish, and measuring its thermoelectromotive force. ;CONSTITUTION: A molten steel 6 is poured into a tundish 1, and a molybdenum electrode 4 is inserted thereto. When the level of the molten steel 6 rises and reaches to an iron electrode 12 and the molybdenum electrode 4, a hot contact is formed there, and a thermoelectromotive force proportional to the molten steel temperature is induced in a cold contact. This thermoelectromotive power is inputted to a temperature converter 5, and converted into a standard signal, which is used as a temperature signal to conduct temperature measurement. When the molybdenum electrode 4 is continuously fed after the level of the molten steel 6 reaches to a determined level, the temperature measurement can be continuously performed, and when it is intermittently fed, the temperature measurement can be intermittently performed. Further, since both the electrodes 4, 12 are allowed to directly communicate to each other through the molten steel 6, response delay is extremely shortened, and the temperature measurement can be performed with a response delay within about 0.5sec.;COPYRIGHT: (C)1994,JPO&Japio