Separation of waste plastics by froth flotation––a review, part I

Fraunholcz, N.

doi:10.1016/j.mineng.2003.10.028

Cited by 135 publications

(79 citation statements)

References 5 publications

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“…We identified a very small amount of LDPE and with an X rays fluorescence analyzer more than 1% of PP-FR (bromide flame retardant). This result is consistent with the average composition of the plastic parts in European cars and complements a recent study on the characterization of SR where the quantitative results are very similar but the presence of PP loaded with talc was not detected [6]. The selective grinding tests were conducted with a mixture of virgin materials and SR fraction.…”

Section: Characterization Of a Plastics Materials Sample From The Shresupporting

confidence: 91%

Sorting Mixed Polyolefins from End-of-Life Product by a Selective Grinding Process

Frœlich

Maris

2010

Waste Biomass Valor

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European policy on waste and market demand for material are driving the development of sorting techniques adapted to automobiles and electric products at the end of their lifetimes. In this article, we present work on polymer sorting using selective grinding. Selective grinding is an operation that consists in sorting polymers after shredding. Specific particle size distributions characterize each polymer in the output stream and these differences are used to recover certain polymers by sifting. This process is based on the brittle or ductile properties of polymers. The first results presented in this work concern the sorting of a mixture of polymers and polyolefins, which are chemically incompatible. The working method adopted includes three parts. In the first part, a stream of mixed polymers from the shredder residue (SR) of a treatment chain was characterized. The mixed stream was composed of different grades of polypropylene and different grades of polyethylene. Afterwards, based on the characterization data, selective grinding tests were carried out on a model mixture with virgin materials. Once the selective grinding conditions were validated, other tests were carried out with SRs. The conclusion of this study is that selective grinding can be an efficient technology to sort incompatible polymers, which are not sorted by other processes, such as density separation or automated near infrared sorting.

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Section: Characterization Of a Plastics Materials Sample From The Shresupporting

confidence: 91%

Sorting Mixed Polyolefins from End-of-Life Product by a Selective Grinding Process

Frœlich

Maris

2010

Waste Biomass Valor

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“…The grade of the PP and HDPE in the top and bottom layers is 100% in the AOT 100 ppm solution indicating that wettability control improves the separation results. Fraunholcz (2004) reported that the cutting mechanism and grinding condition (wet or dry, etc.) in sample preparation affect particle wettability.…”

Section: Effect Of Wettabilitymentioning

confidence: 99%

Reverse jig separation of shredded floating plastics — separation of polypropylene and high density polyethylene

Ito

Tsunekawa

Ishida

et al. 2010

International Journal of Mineral Processing

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“…Though acrylonitrile-butadiene-styrene (ABS) and polystyrene (PS) are widely used in household and office appliances, sorting of these two resins is particularly challenging, since ABS and PS are almost identical in appearance. A conventional selecting method utilizes sink-float separation [2], based on the difference in specific gravities. However, specific gravities of ABS and PS partially overlap.…”

Section: Introductionmentioning

confidence: 99%

Sorting of Acrylonitrile-Butadiene-Styrene and Polystyrene Plastics by Microwave Cavity Resonance

Mori¹,

Kobayashi²,

Tahara³

2016

IJWMT

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This paper presents a new sorting method for acrylonitrile-butadiene-stryrene (ABS) and poly styrene (PS) by means of microwave cavity resonator perturbation. In this method, a small piece of sample material is inserted into a cavity resonator at a point when the electric and magnetic fields mark the maximum and the minimum values, respectively. Experiments were carried out with use of 1-, 2-, 5-, and 10-GHz resonators and ABS and PS samples of various sizes. Loss angles of polarizability (tan χ) exhibited differences large enough to achieve accurate sorting between ABS and PS.

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Separation of waste plastics by froth flotation––a review, part I

Cited by 135 publications

References 5 publications

Sorting Mixed Polyolefins from End-of-Life Product by a Selective Grinding Process

Sorting Mixed Polyolefins from End-of-Life Product by a Selective Grinding Process

Reverse jig separation of shredded floating plastics — separation of polypropylene and high density polyethylene

Sorting of Acrylonitrile-Butadiene-Styrene and Polystyrene Plastics by Microwave Cavity Resonance

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