Modeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings

The oil sands industry employs different technologies at pilot and commercial demonstration scales in order to improve the dewatering rate of fluid fine tailings. Of these technologies, centrifugation has advanced to the commercial scale and is playing a major role in the fluid fine tailings managem...

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Autores principales:	Umme Salma Rima, Nicholas Beier, Ahlam Abdulnabi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	fluid fine tailings dewatering modelling seasonal weathering freeze–thaw evaporation Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/27be9f8229884cd7b45e791beabb98e6
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spelling	oai:doaj.org-article:27be9f8229884cd7b45e791beabb98e62021-11-25T18:50:19ZModeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings10.3390/pr91119062227-9717https://doaj.org/article/27be9f8229884cd7b45e791beabb98e62021-10-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/1906https://doaj.org/toc/2227-9717The oil sands industry employs different technologies at pilot and commercial demonstration scales in order to improve the dewatering rate of fluid fine tailings. Of these technologies, centrifugation has advanced to the commercial scale and is playing a major role in the fluid fine tailings management strategy. However, centrifuge technology on its own may not develop the required strength to ensure fine tailings can be incorporated into dry landform reclamation, which requires water contents close to their plastic limit. Hence, it is paramount to combine more than one technology to maximize post-depositional dewatering. Management of the tailings deposit to promote seasonal weathering (freeze–thaw, evaporation and self-weight consolidation) can promote further dewatering. Properly assessing the contributions of the seasonal weathering components is vital to optimizing this strategy. Using the geotechnical properties of centrifuged tailings, the effects of seasonal weathering on tailings were modeled under two different freezing temperature gradients. A coupled analysis combining FSConsol and Unsatcon was used to simulate the deposition scenario similar to the laboratory. The modeling results were found to match the laboratory response reasonably well, indicating the coupled approach proposed in this manuscript is valid and helps to predict the seasonal weathering effects on dewatering.Umme Salma RimaNicholas BeierAhlam AbdulnabiMDPI AGarticlefluid fine tailingsdewateringmodellingseasonal weatheringfreeze–thawevaporationChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 1906, p 1906 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fluid fine tailings dewatering modelling seasonal weathering freeze–thaw evaporation Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	fluid fine tailings dewatering modelling seasonal weathering freeze–thaw evaporation Chemical technology TP1-1185 Chemistry QD1-999 Umme Salma Rima Nicholas Beier Ahlam Abdulnabi Modeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings
description	The oil sands industry employs different technologies at pilot and commercial demonstration scales in order to improve the dewatering rate of fluid fine tailings. Of these technologies, centrifugation has advanced to the commercial scale and is playing a major role in the fluid fine tailings management strategy. However, centrifuge technology on its own may not develop the required strength to ensure fine tailings can be incorporated into dry landform reclamation, which requires water contents close to their plastic limit. Hence, it is paramount to combine more than one technology to maximize post-depositional dewatering. Management of the tailings deposit to promote seasonal weathering (freeze–thaw, evaporation and self-weight consolidation) can promote further dewatering. Properly assessing the contributions of the seasonal weathering components is vital to optimizing this strategy. Using the geotechnical properties of centrifuged tailings, the effects of seasonal weathering on tailings were modeled under two different freezing temperature gradients. A coupled analysis combining FSConsol and Unsatcon was used to simulate the deposition scenario similar to the laboratory. The modeling results were found to match the laboratory response reasonably well, indicating the coupled approach proposed in this manuscript is valid and helps to predict the seasonal weathering effects on dewatering.
format	article
author	Umme Salma Rima Nicholas Beier Ahlam Abdulnabi
author_facet	Umme Salma Rima Nicholas Beier Ahlam Abdulnabi
author_sort	Umme Salma Rima
title	Modeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings
title_short	Modeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings
title_full	Modeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings
title_fullStr	Modeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings
title_full_unstemmed	Modeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings
title_sort	modeling the effects of seasonal weathering on centrifuged oil sands tailings
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/27be9f8229884cd7b45e791beabb98e6
work_keys_str_mv	AT ummesalmarima modelingtheeffectsofseasonalweatheringoncentrifugedoilsandstailings AT nicholasbeier modelingtheeffectsofseasonalweatheringoncentrifugedoilsandstailings AT ahlamabdulnabi modelingtheeffectsofseasonalweatheringoncentrifugedoilsandstailings
_version_	1718410638326235136

Modeling the Effects of Seasonal Weathering on Centrifuged Oil Sands Tailings

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