Vacuum smelting process for producing ferrotungsten

Details Vacuum smelting process for producing ferrotungsten Vacuum smelting process for producing ferrotungsten

1977-02-14

1978-09-12

Schafer, Richard E.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75 84, 75 90R, 75123J, 751335, 75225, C22C 3822

Patent

active

041134796

ABSTRACT:
A process for producing ferrotungsten alloys by forming a uniform mixture comprised of a finely-particulated tungsten-containing mineral, such as wolframite, scheelite, ferberite, and/or huebnerite; a supplemental quantity of a particulated iron-bearing material and a controlled amount of a carbonaceous reducing agent which is agglomerated into a plurality of pellets which are heated to an elevated temperature under a controlled vacuum for a period of time sufficient to effect a reduction of the tungstic oxide constituent to the metallic state and volatilization and extraction of the volatile constituents in the pellets, and an alloying of the metallic tungsten with the iron constituent, producing substantially dense sintered ferrotungsten alloy pellets.

REFERENCES:
patent: 2909427 (1959-10-01), Rathmann et al.
patent: 3107165 (1963-10-01), Ham et al.
patent: 3637370 (1972-01-01), Buker
patent: 3647420 (1972-03-01), Restelli
patent: 3865573 (1975-02-01), Neumann et al.
patent: 3966459 (1976-06-01), Buker
patent: 3999981 (1976-12-01), Brandstatter
patent: 4039325 (1977-08-01), Buker
Kroll, W. J. et al., "Reactions of Carbon and Metal Oxides in a Vacuum", Trans. Electrochem. Soc., 93, pp. 247-258, 1948.

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