Union for providing inert gas between teeming nozzle and pouring tube
AssigneeUSS Engineers and Consultants, Inc.
InventorAnthony Thrower
Life of this patent
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Abstract
In submerged teeming operations the extended pouring tube which receives molten metal from a vessel via a nozzle has gas admitted thereto for protecting it against molten metal attack. A union block is sandwiched between the nozzle and pouring tube, block being surrounded by a metal jacket spaced therefrom to form a gas manifold to be fed with gas via a gas supply pipe. Gas admitted to the manifold is ejected, around the lower end of the union block, by a surrounding annular orifice into the pouring tube and flows downwardly along the wall thereof as a protective gas film.
Claims10
Apparatus for use in the submerged pouring of molten metals including a nozzle, an elongated submersible pouring tube downstream of said nozzle and means forming a union therebetween, said union comprising:
- (a) a block of refractory material having a longitudinal aperture for communication between said nozzle and said pouring tube;
- (b) a metal jacket surrounding said refractory block in spaced relation therefrom to define an annular manifold space;
- (c) gas supply means communicating with said manifold space;
- (d) said annular manifold space terminating at its downstream end in a gas discharge orifice;
- (e) said metal jacketed refractory block forming a gas-tight joint with the upstream end of said pouring tube;
- and
- (f) said gas discharge orifice being arranged to eject gas supplied to said manifold space in a downstream direction substantially along the inner wall of said pouring tube.
Apparatus for use in submerged pouring of molten metals, comprising a nozzle leading downstream to an elongated submerged pouring tube, the nozzle having, at least at its downstream end, a metal jacket spaced therefrom to define an annular manifold space, a gas supply pipe communicating with said manifold space, and gas discharge orifice means at the said end of the nozzle, the nozzle and its metal jacket forming a gas-tight joint with the upstream end of the pouring tube, and said orifice means being arranged to eject gas fed into the manifold space in a direction substantially along the inner wall of the pouring tube.
Dependencies are inferred from the claim text.