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Title:
TREATMENT OF TAILINGS STREAMS WITH ONE OR MORE DOSAGES OF LIME, AND ASSOCIATED SYSTEMS AND METHODS
Document Type and Number:
WIPO Patent Application WO/2019/094620
Kind Code:
A3
Abstract:
Methods and systems for treating oil sands tailings streams using multiple dosages of lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 3-40% solids by total weight, combining the tailings stream with a first dosage of lime to produce a first mixture having a pH of less than 12.0, and then combining the first mixture with a polymer to produce a second mixture, in some embodiments, the method can further include combining the second mixture with a second dosage of lime to produce a third mixture having a pH greater than 12.0, and dewatering the third mixture in a centrifuge unit and/or a pressure filtration unit to produce a product stream having 55% or more solids by weight.

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Inventors:
TATE MICHAEL (US)
LEIKAM JARED (CA)
FOX JESSE (CA)
ROMANIUK NIKOLAS (CA)
Application Number:
PCT/US2018/059863
Publication Date:
July 11, 2019
Filing Date:
November 08, 2018
Export Citation:
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Assignee:
GRAYMONT WESTERN CANADA INC (CA)
International Classes:
B01D21/01; C02F1/52; C10G1/04
Foreign References:
CA2522031C2013-02-19
US20140116946A12014-05-01
US4282103A1981-08-04
US20150034530A12015-02-05
US7695612B22010-04-13
Attorney, Agent or Firm:
KUMAR, Vijay et al. (US)
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