Rotary stirring device for treating molten metal

C - Chemistry – Metallurgy – 22 – B

Patent

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Details

C22B 9/05 (2006.01) F27D 27/00 (2010.01) B01F 3/04 (2006.01) C22B 21/06 (2006.01) B01F 7/00 (2006.01)

Patent

CA 2511435

The invention relates to a rotary device for dispersing a gas in a molten metal. The device comprises a hollow shaft (20) at one end of which is attached a rotor (22). The rotor (22) has a roof (24) and a base (26) which are spaced apart and connected by a plurality of vanes (32). A compartment (34) is defined between each adjacent pair of vanes (32) and the roof (24) and the base (26), and each compartment (34) has an inlet (36) and first and second outlets (38,40). A flow path is defined through the shaft (20) into the inlets (36) of the compartments (34) and out of the first and second outlets (38,40). Each first outlet (38) is disposed radially outwardly of the respective inlet (36) and arranged to disperse gas laterally of the rotor (22) in use, and each second outlet (40) is disposed in the roof (24) of the rotor (22) and arranged to disperse gas upwardly from the rotor (22) in use.

Cette invention concerne un dispositif rotatif servant à disperser un gaz présent dans un métal en fusion. Le dispositif comprend un puits creux (20) à une extrémité duquel est fixé un rotor (22). Le rotor (22) présente un toit (24) et une base (26) espacés l'un de l'autre et reliés par plusieurs aubes (32). Un compartiment (34) est délimité entre chaque paire d'aubes (32) adjacente et le un toit (24) et la base (26), et chaque compartiment (34) présente un orifice d'entrée (36) et un premier et un second orifices de sortie (38, 40). Le puits (20) est traversé d'un circuit d'écoulement qui passe par les orifices d'entrée (36) des compartiments (34) pour déboucher sur le premier et le second orifices de sortie (38, 40). Chaque premier orifice de sortie (38) est disposé radialement vers l'extérieur de l'orifice d'entrée (36) respectif et arrangé pour disperser le gaz latéralement, depuis le rotor (22), pendant l'utilisation; et chaque second orifice de sortie (40) est disposé dans le toit (24) du rotor (22) et arrangé pour disperser le gaz vers le haut, depuis le rotor (22), pendant l'utilisation.

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