Apparatus and method for evaluating the stability of a disperse

Details Apparatus and method for evaluating the stability of a disperse Apparatus and method for evaluating the stability of a disperse

1995-07-07

1996-12-17

Chilcot, Richard

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73818, G01N 308

Patent

active

055855695

ABSTRACT:
An apparatus and a method for evaluating the stability of a disperse solid material against caking. The apparatus includes a chamber for storing a sample of the disperse solid material, the chamber having a diverging cross sectional area along a line of action of a compression load compressing the sample so as to cake a portion of the sample and an opening for enabling separation of the uncaked portion of the sample from the caked portion of the sample, a shutter for selectively sealing the opening during partial aggregation of the sample and a compression load mechanism for applying the compression load. The method includes the steps of providing a known weight of a sample of a disperse solid material, applying a compression load so as to cake a portion of the sample, separating an uncaked portion of the sample from a caked portion of the sample after partial aggregation of the sample and computing an index for the stability of the disperse solid material against caking.

REFERENCES:
patent: 3890830 (1975-06-01), Dyck
patent: 4161114 (1979-07-01), Kraeutle
patent: 4179916 (1979-12-01), Konnerth
patent: 4716768 (1988-01-01), David et al.
patent: 5397994 (1995-03-01), Phare
The Storage and Flow of Powders by J. C. Williams; Principles of Powder Technology pp. 91-119.
A Method of Evaluating the Mechanical Characteristics of Powders from the Determination of the strength of Compacts by Newton et al.; Powder Technology, 72 (1992) pp. 97-99. Jan. 1992.

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