Recovering metallic fractions from waste electrical and electronic equipment by a novel vibration system

Habib, Muddasar; Miles, N.J.; Hall, Philip

doi:10.1016/j.wasman.2012.11.017

Cited by 35 publications

(8 citation statements)

References 24 publications

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“…Besides magnetic material separation, recently developed processes like vertical vibration systems are widely utilized to separate metals and plastics from WEEE [86]. For example, vertical vibration systems improve the plastics separation from heterogeneous mixtures, like PCB waste metals [87].…”

Section: Magnetic Separationmentioning

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: Magnetic Separationmentioning

confidence: 99%

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

2019

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“…The subsequent recovery process could be re-shred the dense fractions produced by pneumatic jig for better liberation and concentrate with techniques like vibratory separation (Habib et al, 2013). pneumatic separation, in metal recovery from WEEE.…”

Section: Discussionmentioning

confidence: 99%

“…The pneumatic jig’s capability for processing coarse particles makes it suitable as a pretreatment process to improve the overall economic and environmental performance of recycling. The subsequent recovery process could be re-shred the dense fractions produced by pneumatic jig for better liberation and concentrate with techniques like vibratory separation (Habib et al, 2013). The results reveals high concentrations of boron (B), strontium (Sr), gold (Au), cadmium (Cd), and cerium (Ce) in the top fraction.…”

Section: Discussionmentioning

confidence: 99%

The application of pneumatic jigging in the recovery of metallic fraction from shredded printed wiring boards

et al. 2015

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Waste electrical and electronic equipment (WEEE) is one of the fastest growing waste streams worldwide with volumes increasing by 40% each year. WEEE has attracted increasing concern worldwide due to its high metal content and the potential environmental threat which results from uncontrolled recycling practices. Innovative physical separation techniques for WEEE recycling are preferential compared with chemical methods because of the reduction of energy and chemical consumption as well as potential environmental threats. Pneumatic jigging is a dry separation process capable of achieving good separation of coarse material within a very narrow density range, which makes it suitable as a pretreatment process for WEEE recycling. The work presented in this paper investigates the potential application of pneumatic jigging in metal recovery from WEEE. A pilot scale pneumatic jig has been developed by University of Nottingham Ningbo to separate shredded printed wiring boards into two streams: a light fraction (mainly non-metallic fraction consisting of glass fiber, fluffs, and plastic pieces) and dense fraction (metallic fraction). The novelty of work presented in this paper is the application of a dry separation technique in WEEE recycling for metal recovery. Compared with conventional wet separation processes involved in WEEE recycling industry, dry separation has the advantage of zero secondary pollution. The results of this experimental program show pneumatic jigging to be an effective and environmental friendly technique as a pretreatment process for the recovery of the metallic fraction from shredded WEEE.

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“…In this sense, it is very difficult to predict the amount and frequency of WEEE. Habib et al (2013) also affirm that there is uncertainty of future supply and demand of recycled materials, mentioning the international markets. Kahhat and Williams (2012) affirm that there is a lack of knowledge about end-of-life electronics fate from individual and institutional users.…”

Section: Resource Uncertaintymentioning

confidence: 68%

The recycling of electronic waste: regulations and corporate strategies in Brazil and in Europe.

Schneider¹

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Recovering metallic fractions from waste electrical and electronic equipment by a novel vibration system

Cited by 35 publications

References 24 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

The application of pneumatic jigging in the recovery of metallic fraction from shredded printed wiring boards

The recycling of electronic waste: regulations and corporate strategies in Brazil and in Europe.

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