C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
C01F 11/22 (2006.01) C01B 7/19 (2006.01) C01G 43/01 (2006.01) G21F 9/30 (2006.01)
Patent
CA 2307975
The object of the present invention is to simplify the depleted UF6 processing plant and processing method and to prevent calcium fluoride to be a fine powder, wherein the processing plant comprises a first fluidized bed reactor for forming UO2F2 and hydrogen fluoride by allowing depleted UF6 to react with steam, a second fluidized bed reactor for forming U3O8, hydrogen fluoride and oxygen by allowing UO2F2 to react with steam, a gas cooler for cooling hydrogen fluoride at 150 to 300°C, and a fluoride fixing reactor for forming calcium fluoride by allowing cooled hydrogen fluoride to contact calcium carbonate; and wherein the processing process comprises a dry vapor-phase reaction step for forming UO2F2 and hydrogen fluoride by allowing depleted UF6 to react with steam at a temperature of 230 to 280°C, and a fluorine fixing step for forming granular calcium fluoride by allowing hydrogen fluoride generated in the dry vapor- phase reaction step to contact granular calcium carbide at a temperature of 150 to 300°C.
Mitsubishi Materials Corporation
Riches Mckenzie & Herbert Llp
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