Apparatus for producing neodymium-iron alloy

Details Apparatus for producing neodymium-iron alloy Apparatus for producing neodymium-iron alloy

1987-04-08

1988-05-31

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204245, 204246, 204284, 204292, 204294, C25D 1700, C25C 336, C25C 700

Patent

active

047479248

ABSTRACT:
A process and an apparatus for producing a neodymium-iron alloy by electrolytic reduction of neodymium fluoride in a bath of molten electrolyte, consisting essentially of 35-76% by weight of neodymium fluoride, 20-60% by weight of lithium fluoride, up to 40% by weight of barium fluoride and up to 20% by weight of calcium fluoride, conducted between one or more iron cathode and one or more carbon anode. The apparatus comprises an electrowinning cell of refractory materials coated inside with a lining resistive to the bath, the carbon anode of constant transverse cross-sectional shape over its length, immersed into the electrolyte bath at its free end, the iron cathode of constant transverse cross-sectional shape over its length, immersed into the electrolytic bath at its free end, a receiver placed on the bottom of the cell for collecting the produced neodymium-iron alloy in a liquid state on the tip of the iron cathode, siphoning means for withdrawing the molten alloy pooled in the receiver out of the cell, and feeding means for feeding the ever wearing iron cathode into the electrolyte bath so as to apply the direct current to the iron cathode with a predetermined current density.

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