tribocharging device for electrostatic separator
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tribocharging device for electrostatic separator

Electrostatic separation of polymer waste by tribocharging ...

Mar 04, 2021  After tribocharging, the output door is opened and polymer waste particles with residual electric charger positive or negative arrive in top of the electrostatic separator device. This section of the apparatus is composed by two electrodes of aluminum in the rectangular shape that are facing each other on an oblique position inside a box of the ...

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Tribocharging of plastics granulates in a fluidized bed device

Jun 01, 2005  The electrostatic separation tests carried out on PET and PVC granulates confirmed the effectiveness of the fluidized bed tribocharging device integrated in a free fall separator. They pointed out three charging mechanisms by particle/particle and particle/walls collisions.

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New Propeller-Type Tribocharging Device With Application ...

Jan 04, 2017  New Propeller-Type Tribocharging Device With Application to the Electrostatic Separation of Granular Insulating Materials

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Experimental Comparative Study of Different Tribocharging ...

the fluidized bed device is slightly more efficient compared to the propeller and rotating tube tribochargers. IV. CONCLUSION Triboelectrostatic separation is considered as an effective way for sorting different plastics in the recycling industry. The comparative study of five tribocharging devices

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Tribocharging of Granular Plastic Mixtures in View of ...

Jul 25, 2008  Abstract: The output of any electrostatic separation process is strongly dependent on the effectiveness of particle charging. A novel laboratory-scale fluidized-bed tribocharging device has been described in a previous paper. The aim of this paper is to assess the effectiveness of two materials, aluminum and polypropylene (PP), that could be employed in the tribocharging chamber of that device.

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Experimental and numerical analysis of a new tribo ...

Nov 01, 2020  The tribo-electrostatic separator with the tribocharging device (all dimensions in cm). As seen in Fig. 2 , the collector comprises 6 circular crown-shape compartments of same width equal to 50 mm. According to preliminary experiments, boxes 1,2 were reserved for negatively charged particles, boxes 5,6 for positively charged particles and boxes ...

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Recent Researches in Electrostatic Separation Technologies ...

tribocharging device represent key factors in increasing the granules charge and in improving the efficiency of the tribo-electrostatic separation of plastic mixtures. The tribocharging and separation experiments were performed with virgin polyamide (PA) and polycarbonate (PC) granules (Fig. 6.a). All the granular samples used for separation

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Influence of Dielectric Barrier Dis- charge treatment on ...

B. Rotating cylinder tribocharging device A rotating cylinder tribocharging device was used to process either DBD-treated or un-treated particles (Fig. 3). Particles were introduced in a feeder (1). A valve (2) was used to regulate particle flow rate going through the hollow cylinder (3), having an inner di-ameter: 120 mm), which charged them.

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i) Conductive Drum Separators

1.2.3.2 “Electro-Static” Electrostatic Separators The first electrostatic separators for commercial use employed the principle of contact electrification and they were of this “electro-static” type. These separators were the free-fall plate devices in which charged particles would fall between two near-vertical plates. An electric field was

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Electrostatic Separation of Lunar Regolith for Size ...

Aug 06, 2017  In addition, the existing charge on lunar grains reduces the effectiveness of other existing separation methods, but is a boon to an electrostatic separation device. The results of my experiments will reveal the effects of various pre- and post-treatment methods on tribocharging

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New Propeller-Type Tribocharging Device With Application ...

Jan 04, 2017  New Propeller-Type Tribocharging Device With Application to the Electrostatic Separation of Granular Insulating Materials

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Tribocharging of Granular Plastic Mixtures in View of ...

Jul 25, 2008  Abstract: The output of any electrostatic separation process is strongly dependent on the effectiveness of particle charging. A novel laboratory-scale fluidized-bed tribocharging device has been described in a previous paper. The aim of this paper is to assess the effectiveness of two materials, aluminum and polypropylene (PP), that could be employed in the tribocharging chamber of that device.

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Recent Researches in Electrostatic Separation Technologies ...

tribocharging device represent key factors in increasing the granules charge and in improving the efficiency of the tribo-electrostatic separation of plastic mixtures. The tribocharging and separation experiments were performed with virgin polyamide (PA) and polycarbonate (PC) granules (Fig. 6.a). All the granular samples used for separation

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Open Access proceedings Journal of Physics: Conference series

Oct 24, 2020  charged by collisions and frictions with each-others and with the walls of the tribocharging device. In electrostatic separation applications, the granules of a mixture must be sufficiently charged to be attracted by electrodes of opposite polarity for their separation

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what is triboelectric separator

Tribo-aero-electrostatic separator for coarse granular ... 19 Jan 2015 ... THE separation of mixed granular insulating materials is typically a two-step process: the materials are first charged by tribo-electric effect [1 2]...

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Insulating conveyor-belt-type electrostatic separator for ...

A new configuration of tribo-electrostatic separator equipped with an insulating belt conveyor is described and analyzed in this paper. The insulating belt is continually charged by corona discharge produced by a thin wire electrode (diameter: 0.3 mm), placed at a distance of 40 mm above it. The accumulated charge on the belt leads to the enhancement of the electric field at the surface of the ...

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Fluidized Bed Device for Plastic Granules ...

The study of the triboelectrification process is the key factor to the successful industrial application of electrostatic separation in the field of plastics recycling. Therefore, the aim of the present work is to evaluate an original device for the laboratory study of this process. The original design of the fluidized bed type triboelectrification device has the following distinctive features ...

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i) Conductive Drum Separators

1.2.3.2 “Electro-Static” Electrostatic Separators The first electrostatic separators for commercial use employed the principle of contact electrification and they were of this “electro-static” type. These separators were the free-fall plate devices in which charged particles would fall between two near-vertical plates. An electric field was

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Electrostatic Charging Due to Separation of Ions at ...

Mar 03, 2008  An ionic electret is a material that has a net electrostatic charge due to a difference in the number of cationic and anionic charges in the material. Any material that has ions at its surface, or accessible in its interior, has the potential to become an ionic electret.

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(PDF) Tribocharging of Mixed Granular Plastics in a ...

Optimisation of belt-type electrostatic separation of granular plastic mixtures tribocharged in a propeller-type device By Lucian Dascalescu , Mohamed Miloudi , and M. Brahami Experimental Study of the Optimum Operating Conditions of a Pilot-Scale Tribo-Aero-Electrostatic Separator

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laur calin - Academia.edu

The electrostatic separation tests carried out on PET and PVC granulates confirmed the effectiveness of the fluidized bed tribocharging device integrated in a free fall separator. They pointed out three charging mechanisms by particle/particle and particle/walls collisions.

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US840802A - Electrostatic separator. - Google Patents

l Referring to Fx 1, A is a portion of the casing or frame o an electrostatic separator upon whichis mounted a hopper B, which may be ofany suitable construction whereof the purpose is to deliver comminuted material, as through the aperture C, to theelectrode E, which is shown as a cylinder mountl ed to rotate in the direction indicated by the arrow upon a shaft D. i The opposite electrode is ...

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LISTA CU LUCRARI PUBLICATE Anexa la CV 1 in reviste de ...

Tribocharging Device for Electrostatic Separation of Plastics from Electronic Medical Waste”. IFMBE Proceedings, 341 – 346. In book: 6th International Conference on Advancements of

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Recent Researches in Electrostatic Separation Technologies ...

tribocharging device represent key factors in increasing the granules charge and in improving the efficiency of the tribo-electrostatic separation of plastic mixtures. The tribocharging and separation experiments were performed with virgin polyamide (PA) and polycarbonate (PC) granules (Fig. 6.a). All the granular samples used for separation

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Paper 1.24- Dascalescu-revised

Optimisation of belt-type electrostatic separation of granular plastic mixtures tribocharged in a propeller-type device M Miloudi, K Medles, A Tilmatine et al.-Physical model of granule adhesion to the belt-electrodes of a tribo-aero-electrostatic separator Jia Li, Lucian Dascalescu, Mohamed Miloudi et al.-Computational strategies for 3D

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Electrostatic separation of HIPS/ABS and HIPS/ABS-PC ...

separation of HIPS, ABS-PC, and ABS originated from IT waste in the free-fall electrostatic separator, with prior tribocharging in a fluidized bed device The highest recovery rates and purities were obtained for balanced mixtures In the case of heavily unbalanced mixtures high recovery rate and purity close to 100% were obtained for the

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Electrostatic separation of plastic mixtures ABS/HIPS and ...

Free-fall electrostatic separator experimental set-up: 1 – thermohygrometer probe, 2 – thermohygrometer, 3 – fluidized bed tribocharging device, 4 – fluidizing air heater, 5 – pressure gauge, 6 – high voltage supply, 7 – variable angle feeding device, 8 – plate electrodes, 9 – material fractions collector with seven compartments.

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Comparative Experimental Study of Triboelectric Charging ...

Aug 18, 2015  The electric charge per mass ratio of the granules is a critical parameter influencing the purity of recycled plastics and the efficiency of the electrostatic separation process. The aim of the present study is to validate an experimental procedure for the optimization of the vibratory-type tribocharging device for granular plastics.

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A basic triboelectric series for heavy minerals from ...

Electrostatic separation is used in many heavy mineral sand operations for the separation of minerals, particularly where other separation means (density, size, magnetic ... Tribocharging devices using appropriate surface materials ahead of the separator could also be used to enhance these effects.

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ELECTRICE - utcluj.ro

Improvement of the Fluidized Bed Tribocharging Device for Electrostatic Separation of Plastics from Electronic Medical Waste. 6th International Conference on Advancements of Medicine and Health Care through Technology; 17–20 October 2018, Cluj-Napoca,

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Experimental Investigation of Electrostatic Separators of ...

(2014). Experimental Investigation of Electrostatic Separators of Plastic Particles using Different Charging Devices. Separation Science and Technology: Vol. 49, No. 3, pp. 464-468.

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i) Conductive Drum Separators

1.2.3.2 “Electro-Static” Electrostatic Separators The first electrostatic separators for commercial use employed the principle of contact electrification and they were of this “electro-static” type. These separators were the free-fall plate devices in which charged particles would fall between two near-vertical plates. An electric field was

Read More
Electrostatic Charging Due to Separation of Ions at ...

Mar 03, 2008  An ionic electret is a material that has a net electrostatic charge due to a difference in the number of cationic and anionic charges in the material. Any material that has ions at its surface, or accessible in its interior, has the potential to become an ionic electret.

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Factors that influence the efficiency of a fluidized-bed ...

Fluidized bed devices have already been used as tribochargers for various industrial electrostatic separation processes. In the present paper, the authors investigate the behaviour of polyamide - polycarbonate granular plastic mixtures in a parallelepiped bed, the height of which is roughly 2 times its length or width, so that the collisions between granules become the prevailing tribocharging ...

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Figure 10 from Dielectric Barrier Discharge Treatment of ...

Fig. 10. Charge-to-mass ratio for nine types of particles pretreated by DBD and passed through PVC cylinder tribocharging device. - "Dielectric Barrier Discharge Treatment of Granular Plastic Mixtures in View of Their Triboelectrostatic Separation"

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Minerals Ealgl~ering, THE THEORY OF ELECTROSTATIC ...

tribocharging) is then discussed. I. INTRODUCTION In any separator, the separation is brought about by suspending the particles in a medium and subjecting them to a separating force that acts on some particle property. In the case of electrostatic separations, the primary separating force is given by

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Granutools GranuCharge

The GranuCharge measures automatically and precisely the quantity of electrostatic charges created inside a powder during a flow in contact with a selected material. The powder sample flows inside a vibrating V-tube and falls in a uniquely designed Faraday cup connected to an electrometer. The electrometer measures the charge acquired by the ...

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