| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an opening hole method for a molten iron tapping hole, etc. by which the opening hole of the molten iron tapping hole, etc., on a furnace wall can be executed in good condition, even when a material functioning as a guide, such as metal rod, etc. is not used, and a device therefor. SOLUTION: This device is provided with an oxygen lance 2, a rotary joint device 3 to connect and rotate the end part of the oxygen lance 2, a driving device having a motor 4 for lance rotation to rotate the rotary joint device rotating part 3b of the rotary joint device 3 and a travelling carriage 5 equipped with the rotary joint device fixed part 3a and driving device. When the molten iron tapping hole 1, etc., is opened by blowing the oxygen to the wall of the furnace, the oxygen lance 2 is rotated.</p> |
