RECOVERY OF ALUMINUM AND OTHER METAL VALUES FROM FLY ASH

The invention described herein relates to a method for recovering aluminum from fly ash comprising mixing the fly ash with calcium sulfate or a mixture of calcium sulfate with a material selected from the group consisting of calcium carbonate, magnesium sulfate, or magnesium carbonate, sintering the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SEELEY, FOREST G, MCDOWELL, WILLIAM J
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention described herein relates to a method for recovering aluminum from fly ash comprising mixing the fly ash with calcium sulfate or a mixture of calcium sulfate with a material selected from the group consisting of calcium carbonate, magnesium sulfate, or magnesium carbonate, sintering the resultant mixture at a temperature which will convert the fly ash to a crystalline structure, and then leaching the aluminum from the sintered mass with an aqueous inorganic acid.