Recent Progress in Study on Kaolinite Clay and Bauxite

LIU Chang-ling

In the past， the Chinese geologists followed the pre-soviet union specifications to consider ball clay as a variety of re fractory kaolinite clay. Thus we Chinese geologists were misled in searching for ball clay and China has to import ball clay from U. S. A. In fact, ball clay is crystal logenetically varied to kaolinite or refractory clay and the physical properties are also varied. Ball clay should be classified to a separate ore type according to international standard. Previously, the highly ordered kaolin ite is thought to be hydrothermal kaolinite and the disordered, sedimentary kaolinite. The au thor and his colleagues have worked in the large kaolinite deposits in China revealing that large size kaolin ite deposits with homogeneous h igh ly ordered kaolin ite are sedimentary purp le stone band ( palaeozoic soft clay). Such kind of clay can be used as highmobilitymaterial in paper industry. And karst d iaspore bauxite deposits belong to bioorganic sedimen tary deposits.

Tianjin Geological Academy, Tianjin 300061

Received Date: 2004-11-12

Rev Recd Date: 2005-03-24

Publish Date: 2005-09-10

Key words:

ball clay /
a variety of kaolin and refractory clay /
a separate ore type /
purple stone bandwith highly ordered kaolinite /
biogenic karst bauxite /

Abstract: In the past， the Chinese geologists followed the pre-soviet union specifications to consider ball clay as a variety of re fractory kaolinite clay. Thus we Chinese geologists were misled in searching for ball clay and China has to import ball clay from U. S. A. In fact, ball clay is crystal logenetically varied to kaolinite or refractory clay and the physical properties are also varied. Ball clay should be classified to a separate ore type according to international standard. Previously, the highly ordered kaolin ite is thought to be hydrothermal kaolinite and the disordered, sedimentary kaolinite. The au thor and his colleagues have worked in the large kaolinite deposits in China revealing that large size kaolin ite deposits with homogeneous h igh ly ordered kaolin ite are sedimentary purp le stone band ( palaeozoic soft clay). Such kind of clay can be used as highmobilitymaterial in paper industry. And karst d iaspore bauxite deposits belong to bioorganic sedimen tary deposits.

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Recent Progress in Study on Kaolinite Clay and Bauxite

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