MOLTEN METAL MEASURING SYSTEM AND PROBE USED IN THE SYSTEM

摘要

[PROBLEMS] The invention provides a system and a probe used therein in which the probe is made to immerse and stop in a predetermined depth position from a metal level of molten metal. [MEANS FOR SOLVING PROBLEMS] In a system, a sub-lance equipped with a probe is moved downward by a drive device controlled by a control device, the sub-lance is stopped while an arranged immersion portion is immersed in molten metal, elements to be measured of molten metal are measured by measuring means provided in the probe, and a slag sample is extracted by slag sampling means. A metal detection sensor (27) is provided in the arranged immersion portion (23) for detecting the metal level (ML) of molten metal, and stop position determination means (31) and stop signal output means (32) are provided between the sensor (27) and the control device (18). When the metal level (ML) is detected by the metal detection sensor (27), a downward continuation time period (Tx) of the sub-lance is determined by the stop position determination means (31), and a stop signal is outputted from the stop signal output means (32) when the upper end (U) of the arranged immersion portion (23) coincides with the metal level (ML).