Apparatus for producing rapidly quenched metal particles

Details Apparatus for producing rapidly quenched metal particles Apparatus for producing rapidly quenched metal particles

B - Operations, Transporting

22

F

18/500.2

B22F 9/10 (2006.01) B22F 9/00 (2006.01)

Patent

CA 1279964

APPARATUS FOR PRODUCING RAPIDLY QUENCHED METAL PARTICLES ABSTRACT OF THE DISCLOSURE Apparatus for continuous preparation of rapidly cooled metal particles from a molten source metal by quenching into a quench liquid, wherein a cylindrical quench chamber rotates about its axis to hold the quench liquid against the inner wall thereof under centrifugal force, and a spinner disk within the quench chamber rotates about the same axis to spin off molten metal droplets into the quench liquid. Quench liquid is sup- plied at one end of the quench chamber and removed at the other end continuously, at the same time drawing off the solidified metal particles to an external recirculation loop where the particles are separated from the quench liquid. The spinner disk has an upper surface including a generally conical protruding tip. Metal from a source metal supply tube is directed downwardly onto the apex of the tip to form a laminar flow along the upper surface of the spinner disk. Droplets are formed near the outer periphery of the spinner disk as the liquid source metal is thrown off the disk, so that the time between formation of the liquid drops and their impingement on the wall of quench liquid is very brief. Consequently, the liquid droplets are cooled very rapidly, achieving cooling rates on the order of 107 °C per second.

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