Characterising settling and dewatering of slurries of commercial clays and clay-rich coal tailings

Williams, David J., Delport, Timothy M. A. and Whitton, M. Stuart (2013). Characterising settling and dewatering of slurries of commercial clays and clay-rich coal tailings. In: G. Ward Wilson, David C. Sego and Nicholas A. Beier, Proceedings of the Seventeenth International Conference on Tailings and Mine Waste 2013. Tailings and Mine Waste '13. TMW-2013: Tailings and Mine Waste '13. The 17th International Conference on Tailings and Mine Waste 2013, Banff, AB, Canada, (347-356). 3-6 November, 2013.

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Name Description MIMEType Size Downloads
Author Williams, David J.
Delport, Timothy M. A.
Whitton, M. Stuart
Title of paper Characterising settling and dewatering of slurries of commercial clays and clay-rich coal tailings
Conference name TMW-2013: Tailings and Mine Waste '13. The 17th International Conference on Tailings and Mine Waste 2013
Conference location Banff, AB, Canada
Conference dates 3-6 November, 2013
Proceedings title Proceedings of the Seventeenth International Conference on Tailings and Mine Waste 2013. Tailings and Mine Waste '13
Place of Publication Edmonton, AB, Canada
Publisher University of Alberta Geotechnical Center
Publication Year 2013
Sub-type Fully published paper
Open Access Status
ISBN 9781551953267
Editor G. Ward Wilson
David C. Sego
Nicholas A. Beier
Start page 347
End page 356
Total pages 10
Collection year 2014
Language eng
Formatted Abstract/Summary
Coal mining activities in Australia are proceeding into new resource areas; west into the Surat and Galilee Basins in Queensland, and into the western Hunter Valley Coalfields in New South Wales, in Australia, where clay-rich inter-burdens and multiple thin seams are frequently encountered. The resulting tailings slurries are clay-rich, and hence display poor settling and dewatering behaviour, making them difficult to manage and rehabilitate. It has proven difficult to achieve a settled solids concentration much better than 25% solids by mass on settling slurries of the clay-rich tailings. In an effort to better understand the settling behaviour of these clay-rich tailings, slurries of several commercial clays and two typical clay-rich coal mine tailings have been subjected to settling column testing from a range of initial solids concentrations, in two process waters with various concentrations of metal salts. The settling and dewatering of slurries of the commercial clays has shed light on the behaviour of clays in a more pure form . From this, the settling and dewatering of tailings containing a mixture of clay minerals and non-clay minerals may better be interpreted. The implications of the results are that clayrich coal mine tailings will require dewatering by filtration and/or by desiccation on deposition to maximise process water recovery and achieve an acceptable tailings consistency.
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
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Created: Wed, 26 Mar 2014, 09:16:34 EST by Julie Hunter on behalf of School of Civil Engineering