High purity Zr and Hf metals and their manufacture

Details High purity Zr and Hf metals and their manufacture High purity Zr and Hf metals and their manufacture

1988-05-25

1990-01-30

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 844, 423 62, 423 75, 423 76, 423 84, 423492, C22G 3410

Patent

active

048971162

ABSTRACT:
The process for preparing zirconium, hafnium, vanadium, tantalum, or niobium metal comprising providing in first vessel means a eutectic solution of a chloro, bromo or iodo salt of zirconium or hafnium in a molten thermal body of one or more alkali or alkaline earth metal halides at a non-vaporizing temperature, transferring said eutectic solution to second vessel means, maintaining said second vessel means at a temperature sufficient to vaporize said salt, transferring the salt vapor independently to a bank of separately fed reduction crucibles, the supply of said eutectic solution to said second vessel means being maintained such that said salt vapor can be supplied substantially continuously to said crucibles in a selective manner dependent upon the operating status of each crucible.

REFERENCES:
patent: 3966458 (1976-06-01), Spink
patent: 4725312 (1988-02-01), Seon et al.
patent: 4820339 (1989-04-01), Bienvenu

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