Fractional crystallization process

An improved fractional crystallization process for the purification of aluminum is provided which comprises supplying at least a portion of the heat to the fractional crystallization apparatus adjacent the bottom of the apparatus, the apparatus provided with a high purity refractory liner resistant...

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Bibliographische Detailangaben
Hauptverfasser:	DAWLESS, ROBERT K, GRAZIANO, ROBERT E
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	An improved fractional crystallization process for the purification of aluminum is provided which comprises supplying at least a portion of the heat to the fractional crystallization apparatus adjacent the bottom of the apparatus, the apparatus provided with a high purity refractory liner resistant to attack by molten aluminum. Impure, molten aluminum is removed from the apparatus by an upper exit port. After initial crystallization of the purified aluminum and removal of at least a portion of the impure molten aluminum, the crystals may be remelted for purposes of recovering purified aluminum.