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Development of Accelerated Dewatering Technology for Managing Oil Sands Fine Fluid Tailings

Rick Lahaie, Jack T.C. Seto, Denise Chapman, W. David Carrier III

In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference

Session: M2-A

ABSTRACT: Syncrude Canada Ltd. has been examining several alternative tailings technologies aimed at reducing the accumulation of mature fine tailings (MFT) and creating trafficable surfaces for reclamation. One such method is 'accelerated dewatering', where rim ditching and a decant system combine to promote drainage of surface waters and enhance drying and densification of the MFT. In 2009, a test deposit containing approximately 60,000 m3 of in-line flocculated MFT was constructed and instrumented. The deposit has since been sampled and tested. Ten months after pit filling, the deposit has settled approximately 1.2 m, corresponding to an estimated 19 percent reduction in volume compared to pit filling. The field test is scheduled to run for several more years and will continue to be monitored, sampled, and tested.

RÉSUMÉ: Syncrude Canada Ltd évalue plusieurs technologies de résidus miniers visant à réduire l'accumulation de résidus de fluide et à créer des surfaces réclamables. Un tel méthode s'appelle «l'accélération de déshydratation», où la drainage des eaux de la surface est promue avec les égouts creusés autour le dépôt et un système de décantation. Au cours de 2009, un dépôt d'essai contenant environs 60,000 m3 de MFT a été construit et instrumenté. Le dépôt a été échantillonné et des essais in situ ont été réalisées. Dix mois après avoir rempli le creux, le dépôt a tassé environ 1.2 m, correspondant à une réduction volumétrique estimée à 19 pour cent. Le dépôt continue d'être surveillé, échantillonné et testé, et cela va durer pendant encore au moins plusieurs années. 1 INTRODUCTION

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Cite this article:
Rick Lahaie; Jack T.C. Seto; Denise Chapman; W. David Carrier III (2010) Development of Accelerated Dewatering Technology for Managing Oil Sands Fine Fluid Tailings in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO2010_088, author = Rick Lahaie; Jack T.C. Seto; Denise Chapman; W. David Carrier III,
title = Development of Accelerated Dewatering Technology for Managing Oil Sands Fine Fluid Tailings,
year = 2010
}