PROCEDE DE TRAITEMENT HYDROMETALLURGIQUE DIRECTE DES CENDRES D'ALUMINE

The process comprises grading to 80 per cent in the 3 mm fraction and acid treatment with a soln of 250-350 g/l of H2SO4 at 68-85 deg C. The resulting soln has 520-620 g/l of Al2(SO4)3, 4-10 g/l of Zn, and 0.11-0.40 g/l of Cu, for treatment with Na2S 10-30 per cent soln. Isohydric crystallisation gi...

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Hauptverfasser:	SAROSSY GHEORGHE,RO, BIVOLARU MARIN,RO, RENTI STEFAN,RO, SZASZ ZOLTAN,RO
Format:	Patent
Sprache:	fre ; rum
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:	The process comprises grading to 80 per cent in the 3 mm fraction and acid treatment with a soln of 250-350 g/l of H2SO4 at 68-85 deg C. The resulting soln has 520-620 g/l of Al2(SO4)3, 4-10 g/l of Zn, and 0.11-0.40 g/l of Cu, for treatment with Na2S 10-30 per cent soln. Isohydric crystallisation gives prod. with Zn 50, S 30, Fe 4-5 per cent, and hydrated aluminium sulphate contg. 15.8-18.0 per cent of Al2O3. The Al2O3 and Zn overall extn rates are 86 and 90 per cent respectively.