Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T22:41:44.407Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Dry Grinding on Kaolin Minerals

Published online by Cambridge University Press:  01 January 2024

Hiroshi Takahashi
Hiroshi Takahashi*
Affiliation:
The University of Tokyo, Tokyo, Japan
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The effect of dry grinding of kaolin minerals by a mechanical mortar was examined by x-ray, thermal, and electron microscopic methods. Base exchange capacity and apparent density were also measured. In the early stage of grinding, kaolin crystals cleave and fracture and then split into fine crystals which are considered unit crystallites. Such crystallites gradually change to a disordered kaolin and partially decompose into a noncrystalline substance as grinding progresses. The crystalline and the noncrystalline substances promptly reaggregate and these reaggregated particles have a radial shape. After further grinding, the structure of the reaggregated particle seems to be zeolitic. Finally, the kaolin mineral thoroughly changes to a completely amorphous substance similar to a silica-alumina mixed gel. Consequently, the effect of dry grinding of kaolin is related to the degree of crystallinity of the original kaolin mineral.

Type
Article
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 6 , February 1957 , pp. 279 - 291
Copyright
Copyright © Clay Minerals Society 1957

References

Brindley, G. W. and Robinson, K. (1946) Randomness in the structures of kaolinitic clay minerals: Trans. Faraday Soc., v. 42B, pp. 198–205.CrossRefGoogle Scholar
Dragsdorf, R. D., Kissinger, E. E. and Perkins, A. T. (1951) An x-ray study of the decomposition of kaolinite: Soil Sci., v. 71, pp. 439–448.CrossRefGoogle Scholar
Gregg, S. J., Hill, K. J. and Parker, T. W. (1954) The grinding of kaolinite. I. A preliminary study: J. Appl. Chem., v. 4, p. 631–632.CrossRefGoogle Scholar
Gregg, S. J., Parker, T. W. and Stephens, M. J. (1953) The effect of grinding on kaolinite: Clay Min. Bull., v. 2, pp. 34–44.CrossRefGoogle Scholar
Gregg, S. J., Parker, T. W. and Stephens, M. J. (1954) The grinding of kaolinite. II. A more detailed study: J. Appl. Chem., v. 4, pp. 666–673.CrossRefGoogle Scholar
Jackson, M. L. and Truog, E. (1939) Influence of grinding soil minerals to near molecular size on their solubility and base exchange properties: Soil Sci. Soc. Amer. Proc., v. 4, pp. 136–143.CrossRefGoogle Scholar
Kelley, W. P., Dore, W. N. and Brown, S. M. (1931) The nature of base-exchange material of bentonite, soils and zeolites as revealed by chemical investigations and x-rays: Soil Sci., v. 31, pp. 25–45.CrossRefGoogle Scholar
Kelley, W. P. and Jenny, H. (1936) The relation of crystal structure to base exchange and its bearing on base exchange in soils: Soil Sci., v. 41, pp. 367–382.CrossRefGoogle Scholar
Laws, W. D. and Page, J. B. (1946) Changes produced in kaolinite by dry grinding: Soil Sci., v. 62, pp. 319–336.CrossRefGoogle Scholar
Mackenzie, R. C. and Milne, A. A. (1953) The effect of grinding on micas: Clay Min. Bull., v. 2, pp. 57–62.CrossRefGoogle Scholar
Mackenzie, R. C., Milne, A. A. (1953a) The effect of grinding on micas. I. Muscovite: Min. Mag., v. 30, pp. 178–185.Google Scholar
Marshall, C. E. (1937) The colloidal properties of clays as related to their crystal structure: J. Phys. Chem., v. 41, pp. 935–942.CrossRefGoogle Scholar
Parkert, C. W., Perkins, A. T. and Dragsdorf, R. D. (1950) Decomposition of minerals by grinding: Kansas Acad. Sci. Trans., v. 53, pp. 386–397.CrossRefGoogle Scholar
Shaw, B. T. (1942) The nature of colloidal clay as revealed by the electron microscope: J. Phys. Chem., v. 46, pp. 1032–1043.CrossRefGoogle Scholar
Sudo, T., Nagasawa, K., Amafuji, M., Kimura, M., Honda, S., Muto, T. and Tanemura, M. (1952) Studies on differential thermal analysis curves of Japanese clay minerals: J. Geol. Soc. Japan, v. 58, pp. 116–130.CrossRefGoogle Scholar