Acoustic particle separation

Details Acoustic particle separation Acoustic particle separation

1982-05-19

1985-06-18

Scherbel, David A.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Separating means

209422, 181 05, B07C 500

Patent

active

045236828

ABSTRACT:
A method is described which uses acoustic energy to separate particles of different sizes, densities, or the like. The method includes applying acoustic energy resonant to a chamber (14) containing a liquid or gaseous medium to set up a standing wave pattern that includes a force potential well wherein particles within the well are urged towards the center, or position of minimum force potential. A group of particles to be separated is placed in the chamber, while a non-acoustic force such as gravity is applied, so that the particles (50-52 in FIG.2) separate with the larger or denser particles moving away from the center of the well to a position near its edge and progressively smaller lighter particles moving progressively closer to the center of the well. Particles are removed from different positions within the well, so that particles are separated according to the positions they occupy in the well.

REFERENCES:
patent: 2071260 (1937-02-01), Holden
patent: 2766881 (1956-10-01), Westervelt et al.
patent: 3380584 (1968-04-01), Fulwyler
patent: 4055491 (1977-10-01), Porath-Furedi
patent: 4076617 (1978-02-01), Bybel et al.
patent: 4280823 (1981-07-01), Szonntagh
patent: 4393708 (1983-07-01), Barmatz et al.

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