F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
F27B 7/00 (2006.01) F27D 25/00 (2010.01) B01J 12/02 (2006.01) B01J 19/28 (2006.01) C01G 43/025 (2006.01) C22B 60/02 (2006.01) F27D 23/02 (2006.01)
Patent
CA 2139340
A rotary kiln, particularly for producing uranium dioxide from hexafluoride, has an inlet arrangement (1) a heated rotatable barrel (14). Uranium hexafluoride and steam react together in the inlet arrangement (1) to form uranyl fluoride which is fed into the barrel (14) by the aid of a rotating scroll feed device (17). In the barrel, the uranyl fluoride reacts with a counterflow stream of steam and hydrogen to produce the uranium dioxide. A porous metal or ceramic filter (28) closely surrounds the scroll feed device (17) to remove particles from kiln-produced gases. The filter is maintained in a clean condition by the scraping action of a number of helical blades forming part of the scroll feed device (17). The uranium dioxide powder produced by the kiln may be processed to form nuclear fuel pellets.
Carter Robert
Semeraz John Terry
British Nuclear Fuels Plc
Gowling Lafleur Henderson Llp
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