An overview of operating parameters and conditions in hydrocyclones for enhanced separations

Tian, Jinyi; Ni, Long; Song, Tao; Olson, James A.; Zhao, Junming

doi:10.1016/j.seppur.2018.06.015

Cited by 107 publications

(42 citation statements)

References 144 publications

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“…Understanding the effect of rheology in hydrocyclones can be difficult since the flow behaviour is extremely complex, and many researchers have worked on this area for some years . In hydrocyclones, the slurry is fed tangentially under high pressure creating the centrifugal force and the flux of particles toward the radial positions .…”

Section: Rheology In Mineral Processing Unit Operationsmentioning

confidence: 99%

“…In their review paper, Tian et al presented a comprehensive discussion of the different technologies that can be used to enhance hydrocyclone efficiency, and flocculant‐assisted hydrocyclones appears to be the most feasible option to process slurries with high clay contents. Flocculants should help form compact clay particle aggregates (F‐F) to decrease viscosities and facilitate their separation through the underflow.…”

Section: Rheology In Mineral Processing Unit Operationsmentioning

confidence: 99%

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Slurry rheology in mineral processing unit operations: A critical review

2019

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Knowledge of slurry rheology in mineral processing is essential for the optimization of wet-grinding, dewatering, transport, and tailings management and it is becoming important in flotation due to the increasing need to process complex ores with a high clay mineral content. Slurries of these ores often display complex rheological behaviour even at low solids concentration, and traditional rheology measurements in mineral processing, such as yield stress and apparent viscosities, may not provide the critical information needed for process optimization. The objective of this paper is to provide a comprehensive review of some of the previous rheology studies performed at the bench, pilot plant, and industrial scale for different unit operations and to discuss the potential for alternative rheology measurements to provide a better insight into colloidal particle interactions in slurries with clay minerals. Firstly, the fundamentals of slurry rheology and the influence of colloidal particles are presented. Secondly, rheology measurements for suspensions are described briefly. Thirdly, a review of rheology studies in grinding, classification, flotation, dewatering, and tailings management is done, outlining possible ways of determining types of particle associations in slurries. Finally, recommendations for future research directions are provided.

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Section: Rheology In Mineral Processing Unit Operationsmentioning

confidence: 99%

Section: Rheology In Mineral Processing Unit Operationsmentioning

confidence: 99%

Slurry rheology in mineral processing unit operations: A critical review

2019

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“…The chemical recycling of plastics wastes depends mainly on feeding plastics, feed rate, effectual temperature, time of residence, and on reactor efficiency [58]. However, attainment of liquid compound occurs more at lower temperatures in comparison with gaseous compounds occurring at higher temperatures.…”

Section: Plastics Waste Recyclingmentioning

confidence: 99%

Novel trends in plastic waste management

2019

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Nowadays, there exists a global challenge confronting efficient management of municipal solid wastes. Varying degrees of environmental challenges including regular release of greenhouse gases and scarcity of available space for waste disposal have been caused by escalating accumulation of these wastes' materials resulting in inappropriate waste management. These challenges have aroused alarming public concerns, resulting in political legislation aimed at minimizing the amount of wastes getting into the environment. These activities attempt to offer solution which will enhance sustainable waste management, while promoting MSW recycling, and efficient conversion of waste materials to energy, and other valuable chemicals. These conversion procedures can be achieved through use of either biological processes such as anaerobic digestion or thermochemical procedures such as pyrolysis. Thus, the current review elucidates novel routes effectively utilized in converting MSW to energy and other valuable chemicals. Graphic abstract

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“…And the larger density difference is, the dispersion phase separated from the oil is more easily. For example, in liquid-liquid hydrocyclone, the density difference is proportional to the separation efficiency of hydrocyclone, and the larger the density difference, the greater the centrifugal field strength [32]. In addition, the centrifugal sedimentation velocity is also proportional to the density difference.…”

Section: Mechanisms Of Separationmentioning

confidence: 99%

Heat strengthening of double-field coupling demulsification of industrial waste oil emulsion

Peng

Zhang³

et al. 2018

Appl Petrochem Res

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Demulsification of highly aqueous waste oil is difficult to complete by a single process efficiently. The dewatering-type hydrocyclone is used as the unit body and includes the high-voltage electrode to realize demulsification and dewatering ability of the coupling of high-voltage electric and swirling centrifugal fields in waste oil emulsion efficiently. This study considers the influence of heating temperature on demulsification in coupled field. Thus, a heat-strengthening double-field demulsification process is proposed. Specifically, the effect of heat strengthening on demulsification, dewatering, and separation of doublefield coupled by numerical simulation and experimental methods was investigated. The temperatures of heat-strengthening were 60 °C, 65 °C, 70 °C, and 75 °C. The results show that the separation efficiency predicted by numerical simulation are in good agreement with the experimental results. And the heat-strengthening can effectively enhance the separation effect of two fields and improve the efficiency of the oil-water separation of industrial waste oil. When the heating temperature is raised from 60 to 65 °C, and from 65 to 70 °C, the separation efficiency increases by approximately 4.1% and 6.7%, respectively.

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An overview of operating parameters and conditions in hydrocyclones for enhanced separations

Cited by 107 publications

References 144 publications

Slurry rheology in mineral processing unit operations: A critical review

Slurry rheology in mineral processing unit operations: A critical review

Novel trends in plastic waste management

Heat strengthening of double-field coupling demulsification of industrial waste oil emulsion

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