Method and apparatus for particle classification

Details Method and apparatus for particle classification Method and apparatus for particle classification

1979-01-15

1980-07-22

Hill, Ralph J.

Classifying, separating, and assorting solids

Fluid suspension

Gaseous

209149, 209154, 73432PS, B07B 402

Patent

active

042138523

ABSTRACT:
Particles are classified according to their terminal velocities, which in turn are determined by their size, shape and composition, by dropping a mass of such particles into an air stream flowing in a direction making a substantial angle with the vertical, and having a high degree of uniformity and low turbulence, so that the particles assume trajectories determined by their terminal velocities. The distance downstream travelled by a particle is inversely proportional to its terminal velocity. Receptacles are provided at different downstream distances from the location of introduction of the material, below the flowing air stream, into which particles of different terminal velocities are collected.

REFERENCES:
patent: 916625 (1909-03-01), Stein
patent: 1581242 (1926-04-01), Stebbins
patent: 3385436 (1968-05-01), Murphy
patent: 3933626 (1976-01-01), Stukel et al.

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