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Laboratory processing trials on kaolin-bearing sandstones from Pugu, Tanzania, using conventional and new hydrocyclone bodies

Published online by Cambridge University Press:  09 July 2018

A. J. Bloodworth ,
D. J. Morgan  and
D. A. Briggs
A. J. Bloodworth
Affiliation:
British Geological Survey, Keyworth, Nottingham NG12 5GG, UK
D. J. Morgan
Affiliation:
British Geological Survey, Keyworth, Nottingham NG12 5GG, UK
D. A. Briggs
Affiliation:
British Geological Survey, Keyworth, Nottingham NG12 5GG, UK
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Abstract

Kaolins have been separated from sandstones from the Pugu Hills deposit, Tanzania, using a 15 mm glass hydrocyclone and a laboratory-scale multiple unit consisting of six 10 mm cyclones. Two types of sandstone were treated—containing a disordered kaolin (Pugu D) and a well-ordered variety (Pugu K)—to see whether products could be obtained that met particle-size specifications for paper manufacture. Pugu D gave a product that would meet specifications for both paper-filling and -coating applications with minimal processing, although the extremely fine-grained nature of this kaolin could lead to high viscosities in suspension. Processing of Pugu K gave products containing up to 97% kaolin and particle-size distributions that would meet specifications for filler and, possibly, coating clay. However, it was impossible to eliminate 3% or so of fine-grained quartz from these products and this could militate against use in paper manufacture.

Type
Research Article
Information
Clay Minerals , Volume 24 , Issue 3 , September 1989 , pp. 539 - 548
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1989

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