Flotation kinetics for titanium, zirconium and bitumen recovery from oilsand tailings

Ityokumbul, Mku Thaddeus; Bulani, W.; Kosaric, N.

doi:10.1002/cjce.5450660305

Cited by 3 publications

(5 citation statements)

References 8 publications

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“…The outcomes of a plot like this are seen in Fig. 4 which are close to those described in air-water systems by Shah et al [38] and Ityokumbul et al [39]. The influence of solid inclusion on the bubble slip velocity in the presence of MIBC frother has also been displayed in Fig.…”

Section: Hydrophilic Silica Slurry Experimentssupporting

confidence: 84%

Measurement of Gas–Solid Dispersion Characteristics in a Slurry Flotation Column Using ERT Technique

Vadlakonda

Mangadoddy

2020

Trans Indian Inst Met

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This work mainly aims on the investigation of phase hold-up characteristics in a column flotation at different feed solid concentrations performing for an extensive range of working conditions. Phase hold-ups are measured using the electrical resistance tomography (ERT) coupled with pressure transducers technique. Experiments are conducted for two different nature mineral particles: hydrophilic (silica) and semi-hydrophobic (oxidized coal). The impact of gas superficial velocity, feed superficial velocity and pulp slurry height for a fixed sparger and frother addition on the gas and solid dispersion are studied. Gas hold-up increases with the gas flowrate and slurry feed rate, decreases with solid concentration. Further, bubble dynamics is estimated using coupled ERT with dynamic gas disengagement (DGD) approach. It is found that the solid's presence affect the bubble swarm velocity thereby causing local gas holdup to drop. Possible mechanisms due to solid particles on gas dispersion are discussed and verified in the light of current experimental results.

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Section: Hydrophilic Silica Slurry Experimentssupporting

confidence: 84%

Measurement of Gas–Solid Dispersion Characteristics in a Slurry Flotation Column Using ERT Technique

Vadlakonda

Mangadoddy

2020

Trans Indian Inst Met

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“…It is known from previous investigations that iron, titanium and zirconium minerals have pronounced tendencies to be concentrated in the tailings streams from processing plants which use the hot water extraction process for recovery of bitumen from tar sands (Trevoy et al, 1978) and that flotation-scavenging of such tailings can further concentrate such heavy minerals (Hall et al, 1983;Hall and Tollefson, 1986;Ityokumbul et al, , 1986Ityokumbul et al, , 1988. In this study, Ca++ and Fe+++ ions such as in calcium chloride (CaCI2.…”

Section: Effects Of Ca++ and Fe+++ On The Flotation Behaviour Of Tailmentioning

confidence: 99%

“…Based on an NBC content of 5.3 mass% of dry tailings solids which are produced at the rate of 2400 tonnedday, it may be calculated that isolation of all the NBC from the centrifuge tailings of an oil sands plant producing 2 1,000 m3/d of synthetic crude could provide an energy source equivalent to approximately 125 tonnes of low grade lignite coal per day. Although it is relatively small quantity to have a major impact, failure to recognize its presence in extraction plant tailings as a part of the combustible organics (Ityokumbul et al, 1988) could lead to misinterpretation from combustion analysis.…”

Section: Properties Of Isolated Nbcmentioning

confidence: 99%

Recovery, characterization and conceptual modelling of Non‐Bituminous organic materials from oil sands

1997

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The hot water process has recovered approximately 90% of the bitumen in oil sands, but the remaining 10% of bitumen and naphtha has been lost to the tailings pond. Recovery of bitumen and non-bituminous combustibles (NBC) from centrifuge, scroll and final tailings has been considered. he "hot water" extraction process has been the preferred T commercial method for isolating bitumen from oil sands. This process recovers approximately 90% of the bitumen in the feed (Camp, 1974). Without extra processing steps, the remaining 10% of the bitumen along with a small fraction of diluent naphtha is lost to the tailings pond, representing a significant energy loss. For example, for a plant producing 2 1,000 m3/d (1 30,000 bbl/d) of synthetic crude valued at, for example, $14/bbl, approximately U.S. $60 million/year worth of bitumen is lost to tailings.To recover additional bitumen and diluent naphtha from the aqueous tailings, techniques such as flotation-scavenging, aeration, flocculation, and sorption have been studied by several researchers. The success of the separation process in a flotation system depends heavily on the proper control of surfaces and interfaces involved in the highly complex mixture of several solid phases forming an aqueous suspension through which air bubbles are dispersed. Davitt (1 975), and Bain and Roberts (1979) have described methods for reprocessing tailings sludge by agitation, aeration, and dilution combined with flotation and skimming, respectively. The tailings sludge has been aerated and agitated to form a bituminous froth layer and a lower layer of mineral and water. Sodium silicate has been added as a process aid to improve bitumen recovery. Hall and Tollefson (1979,

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“…Although a great deal of research has been carried out on the application of flotation cells to oil recovery (Angelidou et al, 1977;Takahashi et al, 1979;Strickland, 1980;Sylvester and Byeseda, 1980;Van Ham et al, 1983;Ityokumbul et al, 1988), little work has been done on the application of flotation columns. Moreover, the research done on the flotation cells has been restricted to very dilute emulsions (oil concentrations less than 600 mg/L).…”

Section: Tankmentioning

confidence: 99%

“…The addition of up to 4 percent by weight of sodium chloride resulted in an enhanced performance of the flotation cell. Ityokumbul et al (1988) studied the flotation kinetics of bitumen recovery from oil sand tailings. The results showed that the recovery rate was dependent upon the type of surfactant added to the feed.…”

Section: Tankmentioning

confidence: 99%

Oil recovery from oil in water emulsions using a flotation column

Pal

Masliyah

1990

Can J Chem Eng

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A flotation column was used to recover oil from oil in water emulsions. The feed oil concentrations investigated were relatively high, in the range of 0.25 to 8 percent by volume. Previous studies using conventional flotation cells dealt with very dilute systems where the oil concentration was less than 0.1 percent by volume. The oil recovery was found to decrease with an increase in the feed oil concentration. The addition of wash water to the froth zone of the column had little effect on the oil recovery. The oil recovery decreased with increasing feed flow rate and surfactant concentration. The effect of increasing the gas flow rate was to initially increase the oil recovery. The oil recovery data were analyzed using a kinetic model. The order of the flotation kinetics was found to be 0.6. The gas hold‐up behaviour of the recovery and the froth zones of the flotation column is found to correlate well with the drift‐flux model.

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Flotation kinetics for titanium, zirconium and bitumen recovery from oilsand tailings

Cited by 3 publications

References 8 publications

Measurement of Gas–Solid Dispersion Characteristics in a Slurry Flotation Column Using ERT Technique

Measurement of Gas–Solid Dispersion Characteristics in a Slurry Flotation Column Using ERT Technique

Recovery, characterization and conceptual modelling of Non‐Bituminous organic materials from oil sands

Oil recovery from oil in water emulsions using a flotation column

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