The influence of particle shape on the dynamic dense medium separation of plastics

Ferrara, G.; Bevilacqua, Paolo; Lorenzi, Laura De; Zanin, Massimiliano

doi:10.1016/s0301-7516(99)00078-2

Cited by 37 publications

(10 citation statements)

References 3 publications

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“…Moreover, in a cylindrical centrifugal force separator (hereinafter referred to as CFS) [2,7,9,10,29], the input material stream is directly fed into the vortex without passing the supplying pump, the measurement, and control equipment. This advantage helps prevent plugging and abrasion.…”

Section: Comparing the Benefits And Drawbacks Of Various Sink-float Smentioning

confidence: 99%

Sink–float density separation of post-consumer plastics for feedstock recycling

Bauer

Lehner

Schwabl

et al. 2018

J Mater Cycles Waste Manag

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The paper focuses on current mechanical waste processing technologies and out-of-the-box processes linked to the processing of coal and mineral resources, to ensure high-quality feedstock recycling of polyolefin-rich post-consumer plastic fractions. Moreover, the study aims to provide the basis for the technical and economic feasibility of the chemical recycling route of this plastic fraction. When evaluating common mechanical processes, either dry or wet ones, sink-float separation in a cylindrical centrifugal force separator achieves the best results. It combines the advantages of a simple, robust apparatus of low complexity and high capacity with selective separation through the accelerated settling of particles in the centrifugal field. Furthermore, the disconnection of the separation medium feed from the solid input increases residence times. Based on the above findings, a pilot-scale plant was constructed which consists of a centrifugal force separator and a hydro jig for the pre-separation of heavy waste components. Several test campaigns were conducted to separate polyolefins from various waste fractions. Two-stage processing in the centrifugal force separator rendered almost 90 wt% of polyolefin content in the produced lightweight fraction and of polyolefin recovery. One-stage processing, on the other hand, resulted in reduced polyolefin content in the lightweight fraction.

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Section: Comparing the Benefits And Drawbacks Of Various Sink-float Smentioning

confidence: 99%

Sink–float density separation of post-consumer plastics for feedstock recycling

Bauer

Lehner

Schwabl

et al. 2018

J Mater Cycles Waste Manag

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show abstract

“…The volumetric flow rate of feed liquid can be maintained by regulating the flow through a gate valve between the centrifugal pump and the tank and by regulating the gate valve through the bypass line. DMC separation is based on size, shape and density of particles as far as solid material is concerned (Ferrara et al, 2000). The feed stream characteristics were maintained at preset specific gravity and the amount was adjusted accordingly.…”

Section: Experimental Setup and Techniquementioning

confidence: 99%

Performance characteristics of pilot plant dense media hydrocyclone for beneficiation of coal and 3-D CFD simulation

Suresh

Kumar

Sripriya

et al. 2010

Chemical Engineering Science

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“…Many investigations have been performed to describe and improve the design of hydrocyclones. [3][4][5][6][7][8][9] Depending on the objective of the operation hydrocyclones are of two types. The first one is a Thickener.…”

Section: Introductionmentioning

confidence: 99%

Retracted: Three‐dimensional computational fluid dynamic modeling and simulation of fine particle separation from water by a hydrocyclone

et al. 2011

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In hydrocyclone, the separation involves a complex three-dimensional swirling flow. To improve the design and operation of hydrocyclones, it is important to investigate to flow profile and particle motion for enhanced separation. A three-phase computational fluid dynamics (CFD) model was developed to predict the flow patterns in the hydrocyclone, including prediction of the air core formation. The CFD method was used to simulate the flow fields inside a hydrocyclone to predict its separation efficiency. Three models, k-" model, Reynolds stress model (RSM), and Reynolds stress turbulence model with volume of fluid multiphase model for simulating air core, were compared for the predictions of velocity, axial, and tangential velocity distributions and separation efficiency. It is seen that the percentage of particles to underflow increases with particle size. Results indicate that the turbulence and discrete phase mode effects are clearly represents for predicting the experimental data with enhances separation efficiency.

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The influence of particle shape on the dynamic dense medium separation of plastics

Cited by 37 publications

References 3 publications

Sink–float density separation of post-consumer plastics for feedstock recycling

Sink–float density separation of post-consumer plastics for feedstock recycling

Performance characteristics of pilot plant dense media hydrocyclone for beneficiation of coal and 3-D CFD simulation

Retracted: Three‐dimensional computational fluid dynamic modeling and simulation of fine particle separation from water by a hydrocyclone

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