METODO MEJORADO PARA LA PRODUCCION DE ALUMINA A PARTIR DE MINERALES DE NEFELINA

In nepheline raw material processing to alumina, raw material grinding during charge mixt. prepn. takes place simultaneously with charge mixt. drying, using sinter-step waste gases. During sintering, the charge mixt. is heated to 900-950 deg.C in 1-3 min. while in suspension. The desilicising and ca...

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Main Authors ISAAK ABRAMOVICH ZATULOVSKY, EVGENY IOSIFOVICH KHODOROV, IVAN MIKHAIOLOVICH KOSTIN, GARRY VLADIMIROVICH TELYATNIKOV, ALEXANDR VLADIMIROVICH KOROLKOV, KHOREN AZARAPETOVICH BADALIANTS
Format Patent
LanguageSpanish
Published 29.07.1987
Edition4
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
CONCRETE
INORGANIC CHEMISTRY
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:In nepheline raw material processing to alumina, raw material grinding during charge mixt. prepn. takes place simultaneously with charge mixt. drying, using sinter-step waste gases. During sintering, the charge mixt. is heated to 900-950 deg.C in 1-3 min. while in suspension. The desilicising and causticising sludges, formed during the subsequent hydrochemical treatment of the sinter material, are returned to sinter-step. The process can be applied to nepheline contg. 20-30 wt. % alumina. Waste, with the exception of recycle material, is used in cement, soda and potash prodn. Fuel consumption during sintering is reduced, e.g. by 0.425 t/t alumina. Output is increased, e.g. 4 times. In first, low temp. quick sinter-step, decarbonising achieved can be 100%.
Bibliography:Application Number: MX19800184777