TREATMENT OF RED MUD TREATMENT OF RED MUD

The red mud is melted, the sludge formed and the ferrous prodt. are sepd. and the Na2O and Al oxide content of the reduced sludge are recuperated by scrubbing. Specif. chalk or calcite or cpds. contng. CaO are added to the red mud in molar proportions, based on the dry wt. of the latter. of CaO:SiO2...

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Bibliographic Details
Main Authors GYORGY KAPTAY, ZOLTAN OSVALD, GYULA HORVATH, GYORGY DOBOS, ZOLTAN FELFOLDI, KAROLY SOLYMAR
Format Patent
LanguageEnglish
Published 05.12.1974
Subjects
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
MANUFACTURE OF IRON OR STEEL
METALLURGY
METALLURGY OF IRON
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:The red mud is melted, the sludge formed and the ferrous prodt. are sepd. and the Na2O and Al oxide content of the reduced sludge are recuperated by scrubbing. Specif. chalk or calcite or cpds. contng. CaO are added to the red mud in molar proportions, based on the dry wt. of the latter. of CaO:SiO2 = 1.8-2.2, CaO:TiO2 = 0.9-1.1; CaO:Fe2O3 = 1.8-2.2; CaO: (Al2O3-Na2O) = 0-12/7, the mixt. is fused, and after sepn of iron sludge, the reduced sludge, contng. sodium and calcium aluminate, is scrubbed into 2 phases using a scrubbing agent and Na2CO3 or into a single phase using a soln of Na2CO3 contng. a scrubbing agent.
Bibliography:Application Number: AU19730056405