To increase the reuseability and use frequency of a gas blowing plug by restraining the penetration of molten metal into the gas blowing plug at the time of shifting a ladle.
The ladle has a circuit constituted of a gas cylinder 3 for pressure accumulation, an air operated valve 8 for executing the pressure accumulation and a shuttle valve 7 for executing change-over of the flow passage by the gas pressure difference of prevent the penetration of the metal into the gas blowing plug 2 at the time of shifting the ladle. By this constitution, the gas accumulated in the gas cylinder 3 is supplied into the gas blowing plug 2 even at the time of shifting the ladle and the penetration of the molten metal into the gas blowing plug 2 can be restrained. Therefore. the reuseability and the use frequency of the gas blowing plug 2 can be increased.
ARAMAKI KEIZO
TOMIMATSU HIROYASU
