PROCESS FOR MAKING PELLETS AND POWDERS OF URANIUM DIOXIDE Russian patent published in 2005 - IPC

FIELD: powder metallurgy, namely manufacture of pellets and powders of uranium dioxide.

SUBSTANCE: in metallic sectional water-cooled crucible of induction furnace with frequency of induction currents 60 000 - 12 000000 Hz, polydispersional powder of uranium dioxide or uranium dioxide prepared in the same crucible by reduction of polydispersional powders of uranium oxides of higher valence is subjected to melting. Prepared melt is poured from crucible onto rotating cooled surface. Alloying components are charged into crucible before melting process. Initial material is melt due to heating charge containing reducing agent, metallic uranium, alloying component or their alloys or compounds. Reducing agent forming with oxygen volatile oxides is used. Process is realized in vacuum, reducing or inert atmosphere.

EFFECT: enhanced efficiency, increased fraction size of pellets and powders, lowered quantity of waste materials, reduced cost price of product, increased useful life period of equipment.

6 cl, 2 ex