Rotary device, apparatus and method for treating molten metal

Details Rotary device, apparatus and method for treating molten metal Rotary device, apparatus and method for treating molten metal

C - Chemistry, Metallurgy

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C21C 7/00 (2006.01) F27D 27/00 (2010.01) B01F 3/04 (2006.01) B01F 7/16 (2006.01) B01F 15/00 (2006.01) C22B 9/05 (2006.01) C22B 21/06 (2006.01)

Patent

CA 1256694

FS 1307/FS 1308 ABSTRACT A rotary device for dispersing a gas in molten metal, for example argon in molten aluminium, contained in a vessel, comprises a hollow shaft (1) and a hollow rotor (2) fixedly attached to the shaft (1), the rotor (2) having a plurality of vanes (4) each extending from the shaft (1), or a location adjacent the shaft (1), to- wards the periphery (5) of the rotor (2) whereby the hollow interior of the rotor (2) is divided into a plura- lity of compartments (6), at least one aperture (a) in the top (7) or bottom of the rotor (2) adjacent the shaft (1) and at least one aperture (10) in the peripheral sur- face (9) of the rotor (2) such that when the rotor (2) rotates molten metal can enter each of the compartments (6) through the aperture or apertures (8) in the top (7) or bottom, and flow outwardly through the peripheral aperture or apertures (10) and at least one duct (12) for the passage of the gas extending from the hollow in- terior of the shaft (1) to each of said compartments (6). The gas and molten metal are mixed together within the rotor (2) and on emerging from the rotor (2) the gas is dispersed throughout the body of the molten metal as a stream of very small bubbles.

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