Verfahren und Vorrichtung zum Reinigen und Giessen von Leichtmetall
<PICT:1010418/C6-C7/1> In a method of purifying and casting a liquid light metal or light metal alloy, e.g. Al, Mg, or their alloys, the liquid metal 7, as it flows from a furnace to a mould 2, is conducted over a salt melt 6 of a salt or salts of higher specific gravity than that of the light...
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Main Author | |
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Format | Patent |
Language | German |
Published |
15.11.1966
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Edition | 1 |
Subjects | |
Online Access | Get full text |
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Summary: | <PICT:1010418/C6-C7/1> In a method of purifying and casting a liquid light metal or light metal alloy, e.g. Al, Mg, or their alloys, the liquid metal 7, as it flows from a furnace to a mould 2, is conducted over a salt melt 6 of a salt or salts of higher specific gravity than that of the light metal, primarily consisting of alkaline earth halides, wherein chlorine is electrolytically evolved below the base of the light metal by the passage of a direct current between an electrode 4 acting as a cathode at the bottom of the salt melt, and the light metal melt which forms the anode. The melt may consist of a mixture of barium chloride and calcium chloride. The counter electrode 4 may consist of a liquid metal which is capable of forming an alloy with the metal cathodically deposited from the salt melt, and which has a specific gravity exceeding that of the salt melt; e.g. barium, lead, tin. The current density used should preferably be above 5 amp./sq.dm., e.g. between 20 and 100 amps./sq.dm. In the form shown the salt melt 6 is contained in a bath 3, having a liquid metal cathode 4 which may be replenished via the feeder 13, and may be withdrawn via the opening 12. The liquid light metal 7 enters the bath via a runner 1, and flows therefrom via a runner 11 to a mould 2. Electric connections to the molten metal layers are provided by carbon contacts 8 and 5. A deflecting shield 10 determines the path of the metal 7 through the bath. |
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Bibliography: | Application Number: CH19640006525 |