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The effect of grinding on kaolinite
Published online by Cambridge University Press: 14 March 2018
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).
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- Copyright © The Mineralogical Society of Great Britain and Ireland 1953
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