Process and apparatus for producing alloy containing terbium and

Details Process and apparatus for producing alloy containing terbium and Process and apparatus for producing alloy containing terbium and

1987-03-12

1988-11-08

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

C25C 336

Patent

active

047832452

ABSTRACT:
A process and an apparatus for producing an alloy containing terbium (Tb) and/or gadolinium (Gd). The process includes the steps of: (a) preparing a bath of molten electrolyte which consists essentially of 20-95% by weight of TbF.sub.3 and/or GdF.sub.3, 5-80% of LiF, up to 40% of BaF.sub.2 and up to 20% of CaF.sub.2 ; (b) reducing the TbF.sub.3 and/or GdF.sub.3 in the bath, with carbon anode and with cathode made of a metal such as iron or cobalt, so as to electrodeposit Tb and/or Gd on the cathode, and alloying the electrodeposited Tb and/or Gd with metal of the cathode so as to produce the alloy containing Tb and/or Gd in a liquid state on the cathode; (c) adding the TbF.sub.3 and/or GdF.sub.3 to the bath so as to maintain the composition of the bath, for compensating for consumption of the TbF.sub.3 and/or GdF.sub.3 during production of the alloy; (d) dripping the liquid alloy from the cathode into a receiver having a mouth which is open upward in a lower portion of the bath below the cathode, and thereby collecting the liquid alloy in the form of a molten pool in the receiver; and (e) withdrawing the molten pool of the liquid alloy from the receiver.

REFERENCES:
patent: 3524800 (1970-08-01), Morrice et al.
patent: 3729397 (1973-04-01), Goldsmith et al.
"Fused Salt Electrowinning and Electrorefining of Rare-Earth and Ythrium Metals", Morrice et al, Minerals Sci. Engng, vol. 11 #3, Jul. 1979, pp. 125-136.

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