Method and apparatus for rapidly freezing molten metals and meta

Details Method and apparatus for rapidly freezing molten metals and meta Method and apparatus for rapidly freezing molten metals and meta

1981-03-02

1982-08-31

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Utilizing centrifugal force or rotating forming zone

264 15, 425 8, B01J 214

Patent

active

043471994

ABSTRACT:
Described are a method and apparatus for freezing molten metals and metalloids in particulate or flake form at very rapid cooling rates. A volatile coolant liquid is fed to the center of a rapidly rotating disc-like member to create an outwardly flowing film of coolant across the surface of the member. The material to be processed is fed to the coolant film at a location spaced from the center and is thrown outwardly by centrifugal forces while being cooled by vaporization of the liquid. The rotating member may include upwardly projecting vanes for collision with the outwardly flowing material to produce a higher surface area product.

REFERENCES:
patent: 2356599 (1944-08-01), Landgraf
patent: 2880456 (1959-04-01), Kuzela et al.
patent: 3346673 (1967-10-01), Last et al.
patent: 4069045 (1978-01-01), Lundgren

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