Air interceptive structure in a refractory structure

Details Air interceptive structure in a refractory structure Air interceptive structure in a refractory structure

B - Operations, Transporting

22

D

B22D 11/10 (2006.01) B22D 41/28 (2006.01) B22D 41/42 (2006.01)

Patent

CA 2069297

- 9 - ABSTRACT A refractory structure, such as a sliding nozzle device having a molten steel outlet, which ensures the isolation of molten steel from air. The refractory structure includes refractory materials defining a nozzle bore (7) for downward flow of molten steel, and has grooves (9) which are formed about the nozzle bore for venting air, and which are communicated with a passage or passages (10) leading to an outside air venting device. This arrangement effectively creates a negative pressure in any refractory joint, and thereby prevents any air from entering the nozzle bore through any joint.

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