Process and apparatus for the production of alumina

A process for the production of alumina from aluminum trihydrate in which the trihydrate is dried and pre-heated, after which the remaining free and chemically-bonded water is removed when the trihydrate is converted by calcination to form hot calcined alumina which is cooled to about 50-100° C. in...

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Bibliographische Detailangaben
Hauptverfasser: RAAHAUGE BENNY E, MALEY WILLIAM S
Format: Patent
Sprache:eng
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Zusammenfassung:A process for the production of alumina from aluminum trihydrate in which the trihydrate is dried and pre-heated, after which the remaining free and chemically-bonded water is removed when the trihydrate is converted by calcination to form hot calcined alumina which is cooled to about 50-100° C. in one or more stages. In at least one stage the hot calcined alumina is cooled in a countercurrent cyclone