A New Type Sink-Float Separator for Waste Plastics

Shimoiizaka, Junzo; Kounosu, Akira; Hayashi, Yuzo; Saito, Kozo

doi:10.2473/shigentosozai1953.92.1064_675

Cited by 9 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, plastics recycling technology has made good progress in developing different separation methods. The flotation [3][4][5][6][7], and sink-float [8,9] separation techniques are well known wet methods for plastic separation. Otherwise, electrostatic separation, which has been mainly developed for the mineral beneficiation [10][11][12][13][14][15][16], has been successfully applied to separate paper from plastic, particularly PVC [17].…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Separation of the Shredded Plastic Mixtures Using A Tribo‐Cyclone

Dodbiba

Shibayama

Miyazaki

et al. 2001

Physical Separation in Science and Engineering

View full text Add to dashboard Cite

In this experimental work, artificial plastic mixture of two kinds of components (i.e. PET and PE mixture) is tribo-electrostatically separated. The mixture is charged by friction in a tribo-cyclone.After a certain residence time inside the tribo-cyclone, the charged plastic flakes fall down freely through a horizontal electric field into collection bins. The DC electric field of up to 333 kV/m is created by using two plate electrodes made of Cu and having a given cross-section configuration. The plastic flakes of the mixture are drawn to either positive or negative electrode according to the polarity of the charge and are separated by falling into different bins. In order to ensure an easy and efficient separation, the inner wall of the tribo-cyclone is made of a suitable plastic material to improve the frictional charging of the flakes. Each plastic component is separated with a grade higher than 95% and recovery higher than 75%.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrostatic Separation of the Shredded Plastic Mixtures Using A Tribo‐Cyclone

Dodbiba

Shibayama

Miyazaki

et al. 2001

Physical Separation in Science and Engineering

View full text Add to dashboard Cite

show abstract

“…Flotation, [2][3][4][5] and sink-float 6,7) separation techniques are well known wet methods for plastic separation. Otherwise, electrostatic separation, a dry separation technique that utilizes the electrical charging of particles, has been mainly developed for the mineral beneficiation.…”

Section: Introductionmentioning

confidence: 99%

Triboelectrostatic Separation of ABS, PS and PP Plastic Mixture

et al. 2003

View full text Add to dashboard Cite

The objective of this study was to triboelectrostatically separate artificial plastic mixture of three kinds of components (i.e. ABS, PS and PP mixture). The mixture is charged by friction in tribo-cyclone. After a given period of time inside the tribo-cyclone, the charged plastic flakes fell down freely through a horizontal electric field into collection bins. The DC electric field of maximum 400 kV/m is created by using two parallel plate electrodes made of Cu and having a given cross-section configuration. The plastic flakes of the mixtures are drawn to either positive or negative electrode according to the polarity of the charge and are separated by falling in different bins. The purification of three-component mixture is accomplished by a two-step triboelectrostatic process. Separation tests in a batch laboratory triboelectrostatic separator showed that the efficiency of the separation is strongly depended on tribocharging time, air inlet velocity, and electric field strength. Products of ABS, PS and PP with a grade of 92.1%, 84.9% and 90.0% respectively have been achieved with recoveries above 73.0%.

show abstract

“…Shimoiizaka et al [27] satisfactorily separated various mixtures of plastics of different densities by using a laboratory-scale sink-float separator. They reported that the impurity of each separated product was than 1%.…”

Section: Destinationmentioning

confidence: 99%

Progress in Separating Plastic Materials for Recycling

Dodbiba

Fujita

2004

Physical Separation in Science and Engineering

View full text Add to dashboard Cite

In order to deal with the problems facing the plastics processing industry research, work is focused primarily on designing, developing and testing a variety of separation and sorting techniques able to recover plastics from wastes, which can be re-used or re-processed to form new products. In this regard, technologies developed in mineral processing can be of great help. Various techniques for separating plastics materials have been recently developed. These techniques can be divided in two main categories, i.e. wet separating techniques and dry separating techniques. This paper presents the recent progress in separating plastics reviewing the potential of the available techniques.

show abstract

A New Type Sink-Float Separator for Waste Plastics

Cited by 9 publications

References 0 publications

Electrostatic Separation of the Shredded Plastic Mixtures Using A Tribo‐Cyclone

Electrostatic Separation of the Shredded Plastic Mixtures Using A Tribo‐Cyclone

Triboelectrostatic Separation of ABS, PS and PP Plastic Mixture

Progress in Separating Plastic Materials for Recycling

Contact Info

Product

Resources

About