| 摘要 |
<p>PURPOSE:To efficiently promote refining reaction by impressing ultrasonic wave to a nozzle for blowing gas at the time of the refining by blowing the gas into molten metal. CONSTITUTION:Ultrasonic vibrator 4 is fitted to one end of a metal rod 1, and gas passage 3 is formed in this metal rod 1 and the nozzle or tuyere 7 for blowing the gas if formed at the other end of the metal rod 1, and refractory 2 is constructed around part submerging into the molten metal 6. By this constitution, the metal rod 1 is submerged into the molten steel 6 in a ladle 5 and Ar is blown from the nozzle 7 through the passage 3 and the ultrasonic wave is impressed to the nozzle 7 with the ultrasonic vibrator 4. By this method, bubbling of the Ar gas is made to fine and the refining reaction is efficiently promoted.</p> |
