Rotary device for treating molten metal
First Claim
1. A rotary device for dispersing a gas in molten metal comprising a rotatable hollow shaft and a hollow rotor fixedly attached to the shaft, said rotor comprising top, bottom and peripheral surfaces and a hollow interior, and said rotor having(1) a plurality of vanes each extending from adjacent the shaft, towards the peripheral surface of the rotor whereby the hollow interior of the rotor is divided into a plurality of compartments,(2) means for defining at least one aperture in at least one of the top and bottom surfaces of the rotor, adjacent the shaft, and at least one aperture in the peripheral surface of the rotor, so that when the rotor rotates the molten metal can enter each of the compartments through the at least one aperture in at least one of the top and bottom surfaces, and flow outwardly through the at least one aperture in the peripheral surface, and(3) at least one duct for the passage of the gas, the duct extending from the hollow interior of the shaft to each of said compartments.
1 Assignment
0 Petitions
Accused Products
Abstract
A rotary device for dispersing a gas in molten metal, for example argon in molten aluminum, contained in a vessel, comprises a hollow shaft and a hollow rotor fixedly attached to the shaft, the rotor having a plurality of vanes each extending from the shaft, or a location adjacent the shaft, towards the periphery of the rotor whereby the hollow interior of the rotor is divided into a plurality of compartments, at least one aperture in the top or bottom of the rotor adjacent the shaft and at least one aperture in the peripheral surface of the rotor such that when the rotor rotates molten metal can enter each of the compartments through the aperture or apertures in the top or bottom, and flow outwardly through the peripheral aperture or apertures and at least one duct for the passage of the gas extending from the hollow interior of the shaft to each of said compartments. The gas and molten metal are mixed together within the rotor and on emerging from the rotor the gas is dispersed throughout the body of the molten metal as a stream of very small bubbles.
152 Citations
19 Claims
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1. A rotary device for dispersing a gas in molten metal comprising a rotatable hollow shaft and a hollow rotor fixedly attached to the shaft, said rotor comprising top, bottom and peripheral surfaces and a hollow interior, and said rotor having
(1) a plurality of vanes each extending from adjacent the shaft, towards the peripheral surface of the rotor whereby the hollow interior of the rotor is divided into a plurality of compartments, (2) means for defining at least one aperture in at least one of the top and bottom surfaces of the rotor, adjacent the shaft, and at least one aperture in the peripheral surface of the rotor, so that when the rotor rotates the molten metal can enter each of the compartments through the at least one aperture in at least one of the top and bottom surfaces, and flow outwardly through the at least one aperture in the peripheral surface, and (3) at least one duct for the passage of the gas, the duct extending from the hollow interior of the shaft to each of said compartments.
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13. Apparatus for treating molten metal comprising a vessel and a rotary device for dispersing a gas in molten metal contained in the vessel, said device comprising a rotatable hollow shaft and a hollow rotor fixedly attached to the shaft, said rotor comprising top, bottom and peripheral surfaces and a hollow interior, and said rotor having
(1) a plurality of vanes each extending from adjacent the shaft, towards the peripheral surface of the rotor whereby the hollow interior of the rotor is divided into a plurality of compartments, (2) means for defining at least one aperture in at least one of the top and bottom surfaces of the rotor adjacent the shaft and at least one aperture in the peripheral surface of the rotor, so that when the rotor rotates the molten metal can enter each of the compartments through the at least one aperture in the at least one of top and bottom surfaces, and flow outwardly through the at least one aperture in the peripheral surface, and (3) at least one duct for the passage of the gas, the duct extending from the hollow interior of the shaft to each of said compartments.
Specification