Method and device for measuring the particle size in a slurry or

Details Method and device for measuring the particle size in a slurry or Method and device for measuring the particle size in a slurry or

1977-09-01

1979-12-25

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

250434, G01N 2300, G01N 2124

Patent

active

041807359

ABSTRACT:
A method and a device for determining or observing the average particle size or particle size distribution in a flow of material, such as a slurry, wherein the material is allowed to flow at a constant velocity through a radiation beam, the time interval distribution of the radiation quanta passing through the material flow is measured, this distribution describing the particle size distribution and offering a possibility to control any changes in the size distribution, and from the measured time interval distribution is subtracted the known time interval distribution of the quanta of the radiation beam emitted by the source of radiation, this known distribution being a Poisson distribution, and, finally, the particle size or size distribution is determined arithmetically on the basis of the observed change in the time interval distribution. Preferably, the source of radiation is an X-ray tube or a radio isotope source, and the radiation detector may be a scintillation detector, a proportional counter or a semi-conductor detector.

REFERENCES:
patent: 3449567 (1969-06-01), Olivier et al.
patent: 3982183 (1976-09-01), Collineau et al.
patent: 4063820 (1977-12-01), Borgese

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