Journal
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
Volume 95, Issue 1, Pages 3-10Publisher
WILEY-BLACKWELL
DOI: 10.1002/cjce.22628
Keywords
oil sands; tailings; flocculation; filtration; dewatering; torque
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Funding
- Natural Resources Canada (NRCan)
- Imperial Oil Limited through the Institute for Oil Sands Innovation
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A cationic polymer, polydiallyldimethylammonium chloride (polyDADMAC), and an anionic (hydrolyzed) polyacrylamide (PAM), were used in sequence to treat the mature fine tailings (MFT) from the oil sands operations in Alberta, Canada. Capillary suction time (CST), specific resistance to filtration (SRF), and filter cake solid content were measured, and cryogenic scanning electron microscopic (cryo-SEM) images of the MFT were taken, before and after the dual polymer treatment to evaluate the dewaterability of the MFT. The results were compared with treatment by a single polymer, which demonstrated that the dual polymer treatment resulted in improved dewaterability of the MFT due to the larger pore sizes.
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