Production of yttrium

Details Production of yttrium Production of yttrium

1978-07-05

1979-12-04

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 84, C22B 404

Patent

active

041770595

ABSTRACT:
This invention relates to refining yttrium. Known methods of refining yttrium involve the use of expensive crucibles made from tantalum or tungsten which are only available in relatively small sizes. According to the present invention there is provided a process for the production of yttrium metal and alloys thereof in which calcium (metal) and yttrium fluoride are reacted together by use of a submerged electric arc in a molten slag.

REFERENCES:
patent: 3009807 (1961-11-01), Dennison
patent: 3150964 (1964-09-01), Carlson
patent: 3264093 (1966-08-01), Sump
patent: 3873307 (1975-03-01), Morrice
patent: 3953579 (1976-04-01), Herchenroeder
patent: 3980468 (1976-09-01), Rosof

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