Process for producing fine spherical particles from non-flowing

Details Process for producing fine spherical particles from non-flowing Process for producing fine spherical particles from non-flowing

1987-01-29

1988-11-01

Brody, Christopher W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

21912173, B22F 100

Patent

active

047817534

ABSTRACT:
A process is disclosed for producing fine spherical powder particles. The process involves forming a relatively uniform admixture of a starting powder material and a flowability aid, the flowability aid being non-reactive with and coarser than the starting material, entraining the admixture in a carrier gas and passing the admixture through a high temperature zone at a temperature above the melting point of the starting material to melt at least about 50% by weight of the starting material, resolidifying the resulting high temperature treated material, and separating the flowability aid from the balance of the high temperature treated material.

REFERENCES:
patent: 3652259 (1972-03-01), Knopp
patent: 3974245 (1976-08-01), Cheney et al.
patent: 4264354 (1981-04-01), Cheetham
patent: 4569693 (1986-02-01), Albrecht et al.
patent: 4711660 (1987-12-01), Kemp
patent: 4711661 (1987-12-01), Kemp

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