| 摘要 |
PURPOSE:To easily, accurately and continuously measure temp. of a cast slab by directly inserting a thermocouple into molten metal in a mold from upper part as cast-in and after that, sending out and supplying a compensating lead wire connected with the thermocouple in accordance with drawing speed of the cast slab. CONSTITUTION:The molten steel 3 is continuously cast into the bending type mold 1, and solidified shell 4 is drawn through guide rolls 6, to obtain the cast slab 5. In the above continuous casting equipment, the thermocouple 8 of Pt-PtRh, etc., is directly inserted into the molten steel 3 in a mold 1 through flux 7 from the upper part. This thermocouple 8, which heat resistant treatment is executed by high melting point metal of W, etc., is used, and brought into contact with solidified shell 4 and stuck. By this method, the thermocouple 8 is made to cast-in together with the molten steel 3 under solidified process. After that, the compensating lead wire 9, in which the heat resistant treatment as the same way as the above, is continuously sent out and supplied from a reel 10 in accordance with the drawing speed of the cast slab. By this method, variation of the temp. of solidified shell 4 in the cast slab is accurately and continuously measured over a secondary cooling zone from the mold 1, to stabilize the operation.
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