PROCEDE ET DISPOSITIF DE DISSOLUTION CONTINUE ET DE TRANSFORMATION PLUS POUSSEE DE L'ALUMINIUM DANS LES MATIERES PREMIERES CONTENANT DE L'ALUMINIUM SELON LE PROCEDE BAYER

The invention relates to a process for the continuous dissolution and further processing of the aluminium content of aluminium-containing raw materials by the Bayer process by mixing the material streams of the raw materials and the material stream or the material streams of the sodium aluminate liq...

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Bibliographische Detailangaben
1. Verfasser:	OSZKAR BORLAI, GYORGY BUCSKY, JENO NEMETH, GYULA ODOR, JOZSEF PAZMANY, IMRE CZINIEL, TIBORNE PETERFI, LAJOS SZUCS, JOSEF TAMAS ET AUREL UJHIDY
Format:	Patent
Sprache:	fre
Schlagworte:	CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS INORGANIC CHEMISTRY METALLURGY
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Beschreibung
Zusammenfassung:	The invention relates to a process for the continuous dissolution and further processing of the aluminium content of aluminium-containing raw materials by the Bayer process by mixing the material streams of the raw materials and the material stream or the material streams of the sodium aluminate liquor and/or sodium hydroxide and/or solution(s) containing additive(s), and optionally water, by heating material streams at least partially during flow, optionally by subsequently keeping said streams hot between or after the heating processes and by further processing the heat-treated mixture, in which material streams of the solution(s) and/or slurry or slurries and optionally of inert gases and/or air are repeatedly mixed, at least in a static mixing element, and optionally allowed to stand in a delay vessel and, if necessary after mixing and/or allowing to stand in the delay vessel, are at least partly recycled, at least an individual or a mixed material stream being heated in one or more stages during dissolution or digestion. The invention also relates to an arrangement for carrying out the process. PROCEDE ET DISPOSITIF DE DISSOLUTION CONTINUE ET DE TRANSFORMATION PLUS POUSSEE DE L'ALUMINIUM DANS LES MATIERES PREMIERES CONTENANT DE L'ALUMINIUM SELON LE PROCEDE BAYER.SELON L'INVENTION, ON FAIT PASSER UNE FOIS OU PLUSIEURS FOIS DE FACON REPETEE UN OU PLUSIEURS COURANT(S) DE MATIERE ISOLE(S) ET RASSEMBLE(S) DE LA OU DES SOLUTION(S) LIQUIDE(S) ETOU DE LA PULPE EVENTUELLEMENT DE COURANT DE MATIERE GAZEUX QUI SE FORME A PARTIR DE VAPEUR D'EAU ETOU DE GAZ INERTE(S) ET OU D'AIR OU D'AIR COMPRIME A TRAVERS AU MOINS UN ELEMENT MELANGEUR STATIQUE; EVENTUELLEMENT ON LAISSE REPOSER DANS L'AUTOCLAVE ET EVENTUELLEMENT ON FAIT RECIRCULER APRES MELANGE ETOU REPOS DANS L'AUTOCLAVE UNE FOIS OU PLUSIEURS FOIS AU MOINS EN PARTIE, ET PENDANT LA SOLUBILISATION ON RECHAUFFE EN TOUT CAS UN COURANT DE MATIERE AU MOINS ISOLE OU MELANGE EN UNE OU PLUSIEURS ETAPE(S).