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The effect of grinding on kaolinite

Published online by Cambridge University Press:  14 March 2018

S. J. Gregg ,
T. W. Parker  and
M. J. Stephens
S. J. Gregg
Affiliation:
Washington Singer Laboratories, University College of the South West, Exeter English Clays, Lovering, Pochin Ltd., St. Austell, Cornwall
T. W. Parker
Affiliation:
Washington Singer Laboratories, University College of the South West, Exeter English Clays, Lovering, Pochin Ltd., St. Austell, Cornwall
M. J. Stephens
Affiliation:
Washington Singer Laboratories, University College of the South West, Exeter English Clays, Lovering, Pochin Ltd., St. Austell, Cornwall
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Extract

In the last twenty years a number of workers have turned their attention to a study of the grinding of clay in an attempt to elucidate a mechanism of the process and the nature of the resultant products.

The pioneers in this field were Kelley et al. who investigated the grinding of bentonite in 1931 and the grinding of kaolinite in 1936. In the earlier results the product showed a slight fogging of X-ray lines and in the latter an increased loss of water when it was examined by controlled dehydration at elevated temperatures; in both systems an increase in base exchange capacity (B.E.C.) was observed. The authors suggested a purely physical disintegration theory, i.e. that decreased particle size could account for all the observations; they postulated fracture both parallel and perpendicular to the cleavage plane and this was supported by the electron microscopic investigations of Shaw (1942).

Type
Research Article
Information
Clay Minerals Bulletin , Volume 2 , Issue 9 , July 1953 , pp. 34 - 44
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1953

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References

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