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Magnesium fluoride recovery method

Patent ·
OSTI ID:6991829
;

A method of obtaining magnesium fluoride substantially free from radioactive uranium from a slag formed in the production of metallic uranium by the reduction of depleted uranium tetrafluoride with metallic magnesium in a retort wherein the slag contains the free metals magnesium and uranium and also oxides and fluorides of the metals. The slag having a radioactivity level of at least about 7,000 rhoCi/gm. The method comprises the steps of: grinding the slag to a median particle size of about 200 microns; contacting the ground slag in a reaction zone with an acid having a strength of from about 0.5 to 1.5 N for a time of from about 4 to about 20 hours in the presence of a catalytic amount of iron; removing the liquid product; treating the particulate solid product; repeating the last two steps at least one more time to produce a solid residue consisting essentially of magnesium fluoride substantially free of uranium and having a residual radioactivity level of less than about 1000 rhoCi/gm.

Assignee:
Rockwell International Corp., El Segundo, CA
Patent Number(s):
US 4874599
Application Number:
PPN: US 7-798080A
OSTI ID:
6991829
Country of Publication:
United States
Language:
English

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Related Subjects

050700* -- Nuclear Fuels-- Fuels Production & Properties
052001 -- Nuclear Fuels-- Waste Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
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360601 -- Other Materials-- Preparation & Manufacture
ACTINIDE COMPOUNDS
ACTINIDES
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MAGNESIUM COMPOUNDS
MAGNESIUM FLUORIDES
MAGNESIUM OXIDES
MANAGEMENT
METALS
MINERAL WASTES
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
RETORTING
SEPARATION PROCESSES
SOLID WASTES
URANIUM
URANIUM COMPOUNDS
URANIUM FLUORIDES
URANIUM OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES