Agglomeration-flotation: recovery of hydrophobic components from oil sands fine tailings

Coleman, Richard D.; Sparks, B.D.; Majid, Abdul; Toll, Floyd

doi:10.1016/0016-2361(95)00067-f

Cited by 23 publications

(4 citation statements)

References 2 publications

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“…Conventional separation methods such as gravitational or centrifugal settling and filtration are found ineffective and costly in reducing the solid content. Recent studies on the separation of fine solids from organic media have demonstrated that reducing aromaticity of the organic solvent through addition of saturated hydrocarbon solvents (e.g., heptane) could induce the coprecipitation of asphaltenes and fine solids, which, however, is at the cost of low bitumen recovery (Akbarzadeh et al 2005;Coleman and Toll 1995;Liu et al 2019a, b;Liu et al 2003;Natarajan et al 2011;Osacký et al 2017;Wang et al 2012).…”

Section: Handling Editor: Hongbo Zengmentioning

confidence: 99%

Destabilization of bitumen-coated fine solids in oil through water-assisted flocculation using biomolecules extracted from guar beans

et al. 2020

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Non-aqueous extraction (NAE) of bitumen from oil sands has been gaining great attention from both the industry and academia as an alternative to the water-based extraction. A fine solids removal step is important for a NAE process in order to obtain high-quality bitumen product, which, however, remains a great challenge to reduce the fine solids content to the desired level. Here, we introduce a strategy of destabilizing the bitumen-coated silica particles in toluene with the addition of water and biomolecules extracted from Cyamopsiste tragonolobuosr L. Taup., i.e., high molecular weight guar gum (HGG) and low molecular weight guar gum (LGG), respectively. By virtue of sedimentation tests and focused beam reflectance measurement analysis, we demonstrate that the introduced water droplets modified with these biomolecules can facilitate the settling of the solid particles in toluene although the underlying mechanisms differ between these two biomolecule cases. Specifically, in the case of LGG, the added water droplets with the interfacial amphiphilic LGG can strengthen the attachment of solid particles from bulk toluene to the LGG surface. This research work provides useful insight into the development of effective approaches for destabilization and removal of bitumen-coated fine solids from NAE bitumen.

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Section: Handling Editor: Hongbo Zengmentioning

confidence: 99%

Destabilization of bitumen-coated fine solids in oil through water-assisted flocculation using biomolecules extracted from guar beans

et al. 2020

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“…On the other hand, forth flotation poorly responds to fine mineral particles, which is mainly due to the small mass of the particles and thus low probability of collision and adhesion of particles to air bubble, leading a low recovery of valuable minerals [2], [3] Accordingly froth flotation is difficult to beneficiate molybdenite fines from ores. It is accepted that flocflotation, in which mineral fines are floated as hydrophobic agglomerates, is an effective process to improve the beneficiation of valuable minerals in fine particle size [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Conditions for Agglomeration of Molybdenite Fines in the Presence of Kerosene Emulsion Through the Extended DVLO Theory

Mendoza¹,

Guajardo²

2021

EJENG

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The hydrophobic agglomeration of fine particles of molybdenite in the presence of kerosene emulsion, has been studied in this paper. The results obtained in the investigation as; zeta potential of kerosene emulsion(?emulsion), zeta potential of the molybdenite sample (?MoS2), hydrophobicity of molybdenite represented by the contact angle (?MoS2) varying the pH, were used to calculate the total potential energy through the extended DVLO theory. Diagram containing curves total potential energy vs. separation distance of the particles, indicate that increasing the pH, also increases the energy barrier to overcome to achieve agglomeration and viceversa, which translates to a high probability of agglomeration in the pH range 5 to 8, with greater effect as the pH is increased in the acidic region.

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“…It is an effective method to aggregate fine particles and has been applied in many fields such as wastewater treatment, pharmaceutical technology, and mineral processing, etc. (1)(2)(3)(4)(5). Compact hydrophobic agglomerate structure is usually required for its applications.…”

Section: Introductionmentioning

confidence: 99%

Morphology of Hydrophobic Agglomerates of Molybdenite Fines in Aqueous Suspensions

Yang

Song

López–Valdivieso

2014

Separation Science and Technology

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In this work the morphology of agglomerates formed in the hydrophobic agglomeration of molybdenite fines in aqueous suspensions has been studied by measuring fractal dimension with image analysis method. The results have shown that the morphology closely correlated with the mechanical conditioning in the hydrophobic agglomeration. The higher the stirring speed and the longer the stirring, the more spherical and more compact the agglomerates. Also, kerosene addition could make the agglomerates to be more spherical and compact.

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Agglomeration-flotation: recovery of hydrophobic components from oil sands fine tailings

Cited by 23 publications

References 2 publications

Destabilization of bitumen-coated fine solids in oil through water-assisted flocculation using biomolecules extracted from guar beans

Destabilization of bitumen-coated fine solids in oil through water-assisted flocculation using biomolecules extracted from guar beans

Determination of the Conditions for Agglomeration of Molybdenite Fines in the Presence of Kerosene Emulsion Through the Extended DVLO Theory

Morphology of Hydrophobic Agglomerates of Molybdenite Fines in Aqueous Suspensions

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