| 摘要 |
An apparatus and a method for positioning the snorkel of a vacuum degassing apparatus beneath the interface of the molten metal and slag in a ladle utilizing means for determining the interface, which means comprises an electrode adapted for positioning within the ladle in electrical contact with the material, indicating means for indicating a first range of voltages produced at said electrode by an electrochemical reaction between the molten metal and the electrode as well as a second range of voltages produced at the electrode by an electrochemical reaction between the slag and the electrode, with means for supporting the electrode independently of the ladle and adapted to enable the electrode to be raised or lowered within, and relative to, the ladle, wherein the electrode is moved to a position within the ladle and relative movement is subsequently produced between the electrode and the ladle whereby the position of the interface will be determined by noting a change in the voltage outputs from one range of voltages to the other, and thereafter relative movement between the ladle and the vacuum degassing apparatus is produced to position the lower opening to the snorkel beneath the interface.
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