Separation of particles adsorbed on carrier material

Details Separation of particles adsorbed on carrier material Separation of particles adsorbed on carrier material

1990-12-12

1992-05-05

Dawson, Robert A.

Liquid purification or separation

Processes

Separating

210767, 2105121, 209211, 415120, 415 71, B01D 2126

Patent

active

051104830

ABSTRACT:
A method is described according to which composite particles made up of carrier magnetite particles with calcium carbonate and calcium phosphate flakes adhered thereto and present in a fluid suspension are separated into particles and flakes. To accomplish the method, the suspension is first introduced into the intake of a centrifugal pump. Vanes within the pump are then rotated to produce turbulence in the pump housing and a velocity gradient within the tangential discharge. The composite particles within the liquid are subjected to the velocity gradient and to shearing forces which cause an effective separation of the composite particles. The velocity gradient is such that shearing separation of the composite particles results in separated elements sized with the magnetite particles at least as large as the separated flakes of calcium carbonate and calcium phosphate.

REFERENCES:
patent: 3926787 (1975-12-01), Gay
patent: 4217207 (1980-08-01), Liller
patent: 4531892 (1985-07-01), Nasman et al.
"Magnetic separation in water pollution control", IEEE Transactions on Magnetics vol. 11 No. 5 September 1975.

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