Process for producing high purity zirconium and hafnium

Details Process for producing high purity zirconium and hafnium Process for producing high purity zirconium and hafnium

C - Chemistry, Metallurgy

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B

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C22B 9/02 (2006.01) C22B 5/04 (2006.01) C22B 34/14 (2006.01) G21C 3/06 (2006.01)

Patent

CA 1275811

ABSTRACT OF THE DISCLOSURE This is a process for producing high quality zirconium or hafnium sponge. It is especially useful for producing the very high purity zirconium which may be used to line the inner surface zirconium of Zircaloy tubing for nuclear fuel rods. The process uses a combination reduction-distillation vessel which is directly fed with zirconium or hafnium tetrachloride from a molten salt sublimer. A precharge of magnesium chloride is used to prevent reduction of metal outside the inner liner, and thereby facilitate removal of the inner liner after reduc- tion and distillation. The agitator for the molten salt sublimer preferably utilizes a molten metal seal around the agitator shaft.

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