A new static separator for metallic particles from metal–plastic mixtures, using eddy currents

Schlett, Z.; Claici, F.; Mihalca, I.; Lungu, Mihai

doi:10.1016/s0892-6875(01)00215-1

Cited by 17 publications

(5 citation statements)

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“…Eddy current separators are ideal for separating large amounts of non-ferrous parts from WEEE and are particularly suitable for handling coarse-sized feeds. Eddy current separation, in addition to electrostatic separation [88,89], can be useful for concentration of non-ferrous metals like Cu or Al from the waste particle sizes between 2 and 50 mm [90]. As Al has the highest ratio of electrical conductivity/density value (13.1 × 10 3 m 2 /Ω·Kg), with eddy current separators, it can be easily separated [91].…”

Section: Eddy Current Separatorsmentioning

confidence: 99%

Advanced Recovery Techniques for Waste Materials from IT and Telecommunication Equipment Printed Circuit Boards

2019

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Waste from information technology (IT) and telecommunication equipment (WITTE) constitutes a significant fraction of waste from electrical and electronic equipment (WEEE). The presence of rare metals and hazardous materials (e.g., heavy metals or flame retardants) makes the necessary recycling procedures difficult and expensive. Important efforts are being made for Waste Printed Circuit Board (WPCB) recycling because, even if they only amount to 5-10% of the WITTE weight, they constitute up to 80% of the recovered value. This paper summarizes the recycling techniques applicable to WPCBs. In the first part, dismantling and mechanical recycling techniques are presented. Within the frame of electro-mechanical separation technology, the chain process of shredding, washing, and sieving, followed by one or a combination of magnetic, eddy current, corona electrostatic, triboelectrostatic, or gravity separation techniques, is presented. The chemical and electrochemical processes are of utmost importance for the fine separation of metals coming from complex equipment such as WPCBs. Thermal recycling techniques such as pyrolysis and thermal treatment are presented as complementary solutions for achieving both an extra separation stage and thermal energy. As the recycling processes of WPCBs require adequate, efficient, and ecological recycling techniques, the aim of this survey is to identify and highlight the most important ones. Due to the high economic value of the resulting raw materials relative to the WPCBs' weight and composition, their recycling represents both a necessary environmental protection action, as well as an economic opportunity.

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Section: Eddy Current Separatorsmentioning

confidence: 99%

Advanced Recovery Techniques for Waste Materials from IT and Telecommunication Equipment Printed Circuit Boards

2019

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“…One of the major drawbacks in corona electrostatic separator is the pinning effect of large insulating particles and that can be enhanced by increasing the image force and/or decreasing the centrifugal force . Eddy current based electrostatic separator is also successfully employed to separate plastic particles from metal/plastic mixture as well as non-ferrous metals from ferrous metals (He et al, 2010;Schlett et al, 2002;. The separation efficiency depends on the different trajectories of particle movements due to eddy current (induced in the non-ferrous particles) and external magnetic field, which deflects the ferrous particles to a higher degree.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Waste Printed Circuit Boards recycling: an extensive assessment of current status

Ghosh

Parhi

et al. 2015

Journal of Cleaner Production

476

180

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“…It is known that electromagnetic irradiation (RF) applied to PANI dispersion generates currents that become heated by Joule effect. 53,44,54 The generated eddy currents are related to the interaction of the oscillating electromagnetic field with the conductive PANI-NP. The heating generated by the PANI is transferred to the surrounding media increasing its temperature.…”

Section: Thermosensitive Pani-np (Pnipam) Used As Stabilizer Of Picmentioning

confidence: 99%

Pickering emulsions stabilized with PANI‐NP. Study of the thermoresponsive behavior under heating and radiofrequency irradiation

Abel

Molina

Rivarola

et al. 2021

J of Applied Polymer Sci

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Micrometric Pickering emulsions in 1-octanol or cyclohexane were stabilized with water-dispersible electroactive polyaniline nanoparticles (PANI-NP). The emulsions were characterized by optical and electronic microscopy as well as spectroscopic techniques. It was demonstrated that nanoparticles maintain their functional properties (e.g., pH sensitivity and electromagnetic absorption) in the emulsion. Furthermore, as a proof of concept, smart Pickering emulsions employing PANI-NP stabilized with a thermosensitive polymer (PNIPAM) were obtained. The thermal behavior of the obtained structures was evaluated by turbidimetric techniques and an IR camera. The thermoresponsive emulsions have shown an important increment of the local temperature (>12 C) under radiofrequency (RF) irradiation. Phase transition of PNIPAM induced by heating or RF absorption provokes the breaking of the emulsions. In this context, the proposed systems herein could induce endothermal reactions carried out in organic solvents. Besides, Pickering emulsions formed by using electroactive PANI-NP could be applied in several medical or industrial applications.

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A new static separator for metallic particles from metal–plastic mixtures, using eddy currents

Cited by 17 publications

References 0 publications

Advanced Recovery Techniques for Waste Materials from IT and Telecommunication Equipment Printed Circuit Boards

Advanced Recovery Techniques for Waste Materials from IT and Telecommunication Equipment Printed Circuit Boards

Waste Printed Circuit Boards recycling: an extensive assessment of current status

Pickering emulsions stabilized with PANI‐NP. Study of the thermoresponsive behavior under heating and radiofrequency irradiation

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