METHOD OF PROCESSING THE URANIUM- AND FLUORINE-CONTAINING WASTES

FIELD: technology of processing uranium-and fluorine-containing wastes. ^ SUBSTANCE: proposed method includes preparation of solutions from wastes, concentration of solutions by sedimentation of uranium followed by dissolving of sediments in nitric acid, extraction conversion of concentrated solutio...

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Bibliographische Detailangaben
Hauptverfasser:	TININ VASILIJ VLADIMIROVICH, LAZARCHUK VALERIJ VLADIMIROVICH, PESHKICHEV JURIJ EGOROVICH, BALAKHONOV VJACHESLAV GRIGOR'EVICH, LEDOVSKIKH ALEKSANDR KONSTANTINOVICH, DORDA FELIKS ANATOL'EVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY DECONTAMINATION ARRANGEMENTS THEREFOR FERROUS OR NON-FERROUS ALLOYS METALLURGY NUCLEAR ENGINEERING NUCLEAR PHYSICS PHYSICS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT TREATING RADIOACTIVELY CONTAMINATED MATERIAL TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: technology of processing uranium-and fluorine-containing wastes. ^ SUBSTANCE: proposed method includes preparation of solutions from wastes, concentration of solutions by sedimentation of uranium followed by dissolving of sediments in nitric acid, extraction conversion of concentrated solutions with the use of tributyl phosphate in hydrocarbon thinner and sedimentation of ammonium polyuranates from re-extracts thus obtained. Sedimentation of uranium at stage of concentration is performed with the use of sodium hydroxide at pH= 9-10 and temperature of 60-90C. Proposed method enhances purification of uranium from fluorine due to enhanced sedimentation and filtration properties of sediments at concentration stage. Content of admixtures in triuranium octa-oxide powders obtained from re-extracts by sedimentation of ammonium polyuranates and subsequent calcination does not exceed specified norms. ^ EFFECT: enhanced efficiency. ^ 1 dwg, 2 tbl, 1 ex