Selective Removal of Impurities from Molten Aluminum

The present disclosure concerns using microstructural engineering techniques to remove or reduce impurity elements from molten aluminum alloys, such as scrap. The impurities are removed by cooling molten aluminum, resulting in the formation of impurity-rich intermetallic compounds containing only on...

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Bibliographische Detailangaben
Hauptverfasser:	Grosko, Tom, Sinha, Manish, Mishra, Brajendra, Davis, Boyd, Hiscocks, Jessica, Das, Subodh, Pickens, John
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present disclosure concerns using microstructural engineering techniques to remove or reduce impurity elements from molten aluminum alloys, such as scrap. The impurities are removed by cooling molten aluminum, resulting in the formation of impurity-rich intermetallic compounds containing only one or more impurity elements as solid inclusions. Subsequent removal of impurity-rich intermetallic sediments by decantation, centrifuge, and filtration techniques can provide an economical method for removing the desired amount of impurities to meet the product specifications.