DEVELOPMENT OF THE EXCER PROCESS. IV. CHLORIDE SYSTEM
An Excer flowsheet for the recovery of uranium from a chloride system by anion exchange is presented. Ore concentrate is dissolved in HCl, purified by anion exchange, electrolytically reduced to uranium tetrachloride, and then precipitated as hydrated uranium tetrafiuoride by the addition of HF. The hydrated uranium tetrafluoride is filtered, dried, pelletized, granulated, and then dehydrated in a fluidized-bed dehydrator at 450 C. In the anion exchange purification step decontamination factors of greater than 10/sup 3/ are realized for all impurities except trivalent iron, pentavalent vanadium, and molybdenum. These three impurities are removed in the uranium tetrafiuoride precipitation step with a decontamination factor of 1O/sup 3/. In an evaluntion, three kilogram batches of Excer uranium tetrafluoride were bomb-reduced to the metal. The first and second runs were reduced as received, and reduction yields of 0 and 14% were obtained. The third batch was ballmilled for 24 hours, improving its blendability with the magnesium reductant, and a yield of 76% was obtained. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-13-002834
- OSTI ID:
- 4275231
- Report Number(s):
- ORNL-2490
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANIONS
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
DECONTAMINATION
ECONOMICS
EFFICIENCY
ELECTROCHEMISTRY
ENRICHMENT
EXCER PROCESS
EXTRACTION COLUMNS
FILTERS
FLUIDIZATION
GRAIN SIZE
HYDROCHLORIC ACID
HYDROFLUORIC ACID
IMPURITIES
ION EXCHANGE
IRON COMPOUNDS
MAGNESIUM
METALS
MOLYBDENUM COMPOUNDS
ORE PROCESSING
PELLETS
PERFORMANCE
PRECIPITATION
RECOVERY
REDUCTION
REFINING
SEPARATION PROCESSES
SOLIDS
SOLUTIONS
TEMPERATURE
URANIUM
URANIUM CHLORIDES
URANIUM HYDROXIDES
URANIUM ORES
URANIUM TETRAFLUORIDE
VANADIUM COMPOUNDS
WATER
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
DECONTAMINATION
ECONOMICS
EFFICIENCY
ELECTROCHEMISTRY
ENRICHMENT
EXCER PROCESS
EXTRACTION COLUMNS
FILTERS
FLUIDIZATION
GRAIN SIZE
HYDROCHLORIC ACID
HYDROFLUORIC ACID
IMPURITIES
ION EXCHANGE
IRON COMPOUNDS
MAGNESIUM
METALS
MOLYBDENUM COMPOUNDS
ORE PROCESSING
PELLETS
PERFORMANCE
PRECIPITATION
RECOVERY
REDUCTION
REFINING
SEPARATION PROCESSES
SOLIDS
SOLUTIONS
TEMPERATURE
URANIUM
URANIUM CHLORIDES
URANIUM HYDROXIDES
URANIUM ORES
URANIUM TETRAFLUORIDE
VANADIUM COMPOUNDS
WATER