C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
39/104
C22B 9/05 (2006.01)
Patent
CA 1169247
12,696 Apparatus for Refining Molten Aluminum Abstract of the Disclosure In an apparatus for refining molten metal comprising, in combination: (a) a vessel having four compartments: an inlet compartment, first and second refining compartments separated by a baffle, and an exit compartment separated from the first refining compartment by a common wall, the last three compartments sharing a common bottom surface, wherein (i) the inlet compartment provides a passageway for the molten metal running from the outside of the vessel to the top section of the first refining compartment; (ii) except as provided in (iii), the baffle is constructed in such a manner that it only permits the passage of molten metal over the top of the baffle; (iii) the bottom section of the second compartment is connected to the exit compartment by an exit tube having an opening on each end, a top wall, to side walls and a bottom wall, said exit tube (1) passing through the baffle and the first refining compartment; (2) having its bottom wall residing on the common bottom surface; and (3) having its inlet end opening into the second refining compartment and its outlet end opening into the exit compartment; and (iv) the exit compartment provides a passageway to the outside of the vessel; (b) one rotating gas distributing device disposed at about the center of each refining compartment, said device comprising a shaft having drive means at its upper end and a rotor fixedly attached to its lower end, the upper end being positioned in the top section of the compartment and the lower end being positioned in the bottom section of the compartment, the improvement comprising providing an exit tube wherein (i) the top wall slants downward from inlet end to outlet end at an angle of about 5 to about 15 degrees from the horizontal and - 1 - 12,696 (ii) the ends of the exit tube are about flush with the baffle and the wall dividing the first refining compartment and the exit compartment. S P E C I F I C A T I O N - 2 -
374922
Hopley William G.
Union Carbide Corporation
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