Apparatus for introducing gas to hot metal in a bottom-pour vessel

Claim 1

4 0 7 5/71 AS FOLLOWS: THE CLAIMS DEFINING THE INVENTION ARE metal in a 1. Apparatus for introducing gas to hot passage within, bottomf-pour vessel comprising a vertical gas the teeming of a gate of a closure mechanism controlling of the vessel, hot metal through a nozzle in the bottom te supply gas through said passage having an outlet adapted of the gate and the nQzzle in the nozzle-closing position of gas at a pressure having an inlet connectable to a supply capable of agitating the hot metal. the outlet 2. Apparatus according to claim 1 wherein opening. of said passage comprises an unobstructed the outlet 3. Apparatus according to claim 1 wherein having a gas- comprises a permeable refractory block the cross transmitting area substantially larger than gas passage sectional area of the inlet and the vertical area of the block comprises a chamber exposing the bottom and provided with the inlet. wherein the inlet 14. Apparatus according to claim 3 leading to the comprises a horizentally positioned pipe chamber. substantially as hereinbefore described drawings. with reference to the accompanying DATED this 5th JANUARY, 1971 USS ENGINEERS AND CONSULTANTS, INC. By its Patent Attorneys: CLEMENT HACK CO., Fellows Institite of Patent Attorneys of Australia. 458, 4 37 2.4 0 75/71 FIG/ FIG.2 FfG.3 16 ~37