| 摘要 |
Improved apparatus for positioning a temperature sensor, such as an expendable immersion thermocouple and a liquidus arrest carbon device in a lance. The apparatus includes a sensor housing and a downwardly extending sensor lance connected to and communicating with the housing. The housing contains a rotatable sensor storage means, a variable-stroke sensor feeder means, and electrical means to power the variable stroke feeder means and limit its upper and lower movement. The electrical means is connected to external control circuitry which is responsive to the presence or absence of thermocouple wiring connections between the sensor and lance tip to automatically feed and position the sensor in the lance tip. A recorder is connected to the thermocouple and liquidus arrest carbon device in the lowermost sensor by means of sensor contacts wiping stationary contacts in the lance tip. A sensor positioned in the lance tip can be inserted into a ferrous bath in a refining furnace, such as a basic oxygen furnace, to determine the temperature and/or carbon content thereof.
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