Method and apparatus for producing fine metal powder

Details Method and apparatus for producing fine metal powder Method and apparatus for producing fine metal powder

1988-02-29

1989-04-25

Stallard, Wayland

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

264 8, 264 10, 264 14, 425 7, 425 8, B22F 908, B22F 910

Patent

active

048244783

ABSTRACT:
A method and apparatus for producing fine metal powder. The method includes the steps of forming a centrifugally maintained annulus of a liquified gas quench medium, forming molten metal drops within the eye of the annulus, urging the drops into the quench medium to solidify the drops, and boiling away the quench medium to leave behind clean, unentrained metal powder. The apparatus includes a drum for containing a liquified gas quench medium, means for adding liquified gas to the inside of the drum, and means for rotating the drum to form an annulus of quench medium. The apparatus further includes means for forming molten metal to be made into powder, and means disposed along the longitudinal axis of the drum and within the eye of the annulus for creating molten metal drops. The molten metal drops are then urged into the quench medium to solidify them into a powder, and the quench medium is boiled away to leave behind clean, unentrained metal powder.

REFERENCES:
patent: 2439772 (1948-04-01), Gow
patent: 3099041 (1963-07-01), Kaufmann
patent: 3329746 (1967-07-01), Joyce et al.
patent: 4217082 (1980-08-01), Bourdeau
patent: 4405535 (1983-09-01), Raman et al.
patent: 4468241 (1984-08-01), Breidenthal, Jr.

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