MOUNTING METHOD OF REFRACTORY PLUG FOR CLOSING OUTFLOW HOLE

PURPOSE:To close and mount surely only the plug into the outflow hole in the base of a vessel without the need for cooling the vessel for a molten metal by mounting refractories to the outside peripheral surface in the lower part of the plug and pressing the same atop the nozzle brick forming said outflow hole thereby pressurizing the refractories. CONSTITUTION:The top end of a metallic pipe 3 is pressed onto the nozzle brick 6 or tuyere brick 7 so as to be made concentrical with the outflow hole 1. The refractory plug 2 is fixed by a support 4 to the inside of the pipe 3 and the castable refractories 5 are packed to the outside periphery in the lower part of the plug 2 according to the eroded condition of the brick 6. The support 4 is lowered by the pressure from a supporting bar 9 by which the refractory plug 2 and the refractories 5 are integrally closed and mounted into the tuyere 12 of the hole 1.