| 摘要 |
PURPOSE:To surely detect the slag level in a converter by inserting a lance embedded with many temp. sensors at suitable intervals in the longitudinal direction into the converter and measuring continuously the temp. in the converter by the temp. sensors. CONSTITUTION:The many thermocouples 3a-3n are embedded at suitable intervals into the water cooling lance 2 to measure the temp. in the converter 1 during blowing in the stage of executing blowing by charging a molten metal 4 and slag 5 into the converter 1 and inserting the lance 2 therein. The top surface 5a of the slag 5 exists near the position where the temp. in the converter measured by the thermocouples 3a-3n exhibits the max. value and the slag height is easily detected from the position of the thermocouple. Slopping is thereby predicted and prevented or the improvement of a yield, the production of a low-N steel, etc., are made possible by controlling the rate of oxygen feed, the height of the lance 2, etc. |
