METHOD AND APPARATUS FOR DIGESTING GIBBSITIC BAUXITE IN A COUNTER-CURRENT REGENERATIVE SYSTEM

Energetic efficiency in a system of gibbsitic bauxite digestion termed counter-current regenerative digestion can be improved significantly by the new method provided by the present invention characterized in submitting the flow of recycled spent liquor, preferably immediately prior to mixing, to at...

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Bibliographische Detailangaben
Hauptverfasser:	OSVALD, ZOLTAN, VERES, GERGELY
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INORGANIC CHEMISTRY METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	Energetic efficiency in a system of gibbsitic bauxite digestion termed counter-current regenerative digestion can be improved significantly by the new method provided by the present invention characterized in submitting the flow of recycled spent liquor, preferably immediately prior to mixing, to at least one evaporation along its preheating path of flow while proceeding to mixing with the flow of ground bauxite. For performing the new improved method the invention provides for an apparatus wherein an evaporator unit is inserted into the preheating path of flow of the recycled spent liquor. The evaporator unit is arranged in said path of flow prior to but in the nearest possible proximity of the mixing point of the preheated liquor with the preferably also preheated flow of ground bauxite. The evaporator unit is heated by high-pressure hot steam introduced to the system from outside source for heating purposes.