Separation of small nonferrous particles using an angular rotary drum eddy-current separator with permanent magnets

Lungu, Mihai

doi:10.1016/j.minpro.2005.07.003

Cited by 23 publications

(11 citation statements)

References 3 publications

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“…The principles of the generally applied physical separation machines, namely the drum magnetic separator, the nozzle air flow separator and the eddy current separator, are well known in the literature (Everett and Peirce, 1990; Faitli et al, 2017; Gundupalli et al, 2017; Lungu, 2005; Maraspin et al, 2004; Miller and Miller, 2009, 2013; Zhang et al, 1999). In construction of a typical eddy current separator applied in waste processing, a rotated magnetic pole motor is installed into another drum used to reverse the belt of the conveyor part of the machine (Gombkötő et al, 2012; Maraspin et al, 2004; Pap et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Developing the combined magnetic, electric and air flow (KLME) separator for RMSW processing

et al. 2018

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The authors are working on the development of a mechanical-physical processing plant to prepare non-selectively collected residual municipal solid waste (RMSW) in the Zalaegerszeg region of Hungary. A key element of this processing plant is the newly developed KLME separator (the name KLME is the Hungarian abbreviation of 'combined magnetic, electric and air flow'). This separator is a combination of three widely applied separators, namely a magnetic separator, an eddy current separator and two types of air flow separators designed without the ordinarily necessary cross connecting belt conveyors and feeders. Extensive RMSW and WEEE (waste electrical and electronic equipment) sampling and analyses were carried out in three municipalities to obtain model materials before designing the technology. After fundamental research and laboratory-scale testing, a pilot-scale KLME separator prototype (1.5 ton/h) was made. It has one input stream and five output streams targeted towards five types of products: two-dimensional materials (foils), three-dimensional light materials, magnetic materials, electrically conductive materials and heavy inert materials. Systematic pilot scale testing was carried out and 18 discrete technological setups were tested. The technology as well as the machine were continuously improved and modified based on on-site observations. The best yields and the experience gained are being utilised for the design of an industrial size machine.

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Section: Introductionmentioning

confidence: 99%

Developing the combined magnetic, electric and air flow (KLME) separator for RMSW processing

et al. 2018

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“…This typically leaves behind a stream of nonferrous metals like copper, aluminum and brass, mixed with other nonmetallic fluff like rubber, textiles, and plastic. Recovery of nonferrous metals then typically occurs through the use of standard eddy current separators, which consist of a spinning drum of permanent magnets placed under a moving conveyor belt Lungu and Rem, 2003;Lungu, 2005). As metallic particles pass over the magnets, electrical eddy currents are induced by the alternating magnetic field, which in turn produces a net magnetic force that alters their trajectories.…”

Section: Introductionmentioning

confidence: 99%

Eddy Current Separation of Nonferrous Metals Using a Variable-Frequency Electromagnet

Dholu¹,

Nagel²,

Cohrs³

et al. 2017

KONA

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We present a novel technique for sorting nonferrous metal scrap by using eddy current separation. However, rather than vary the magnetic field with a spinning rotary drum, our system utilizes a fixed electromagnet excited by an alternating electric current. The technique requires no moving parts other than a feeding mechanism and has the capacity to operate at excitation frequencies up to 50 kHz and beyond. Sorting results are demonstrated using various combinations of metal spheres, which resulted in nearly perfect performance in terms of grade and recovery. We also demonstrate sorting of aluminum alloys from other aluminum alloys, with consistent grade and recovery between 85-95 %.

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“…Non-ferrous metals were separated as copper, bronze and stainless steel according to their types via this sensor on a prototype system [4]. Literature [5] carried out a study in which the separation method for the small metal particles via new dynamic ECS with permanent magnet was examined from inside the non-ferrous two component mixture. This is also named as ECS with angular drum.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of the drum angle on the separation process was examined by changing the drum angle on the horizontal. Experiments carried out with copper, lead and aluminum were also successful [5]. In the literature [6]; Kang and Schoenung carried out a study in which the main criterion for ECS separation was put forth as the ratio of ρ material density to σ electrical conductivity (σ/ ρ).…”

Section: Introductionmentioning

confidence: 99%

Performance Determination of Novel Design Eddy Current Separator for Recycling of Non-Ferrous Metal Particles

Fenercioğlu¹,

Barutcu²

2016

Journal of Magnetics

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Improvements were made in the study for the design of the conventional Eddy Current Separator (ECS) used for separating small sized non-ferrous particles in the waste. These improvements include decreasing the air gap between the material and magnetic drum, making the drum position adjustable and placing the splitter closer to the drum. Thus, small particles were separated with high efficiency. The magnetic drum was removed from inside the ECS conveyor belt system as design change and was placed as a separate unit. Hence, the force generated on the test material increased by about 5.5 times while the air gap between the non-ferrous materials and drum decreased from 3 mm to 1 mm. The non-metal material in the waste is separated before the drum in the novel design. Whereas non-ferrous metal particles are separated by falling into the splitter as a result of the force generated as soon as the particles fall on the drum. Every material that passes through the drum can be recycled as a result of moving the splitter closer to the contact point of the drum. In addition, the drum can also be used for the efficient separation of large particles since its position can be adjusted according to the size of the waste material. The performance of the novel design ECS was verified via analytical approaches, finite element analysis (FEA) and experimental studies.

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Separation of small nonferrous particles using an angular rotary drum eddy-current separator with permanent magnets

Cited by 23 publications

References 3 publications

Developing the combined magnetic, electric and air flow (KLME) separator for RMSW processing

Developing the combined magnetic, electric and air flow (KLME) separator for RMSW processing

Eddy Current Separation of Nonferrous Metals Using a Variable-Frequency Electromagnet

Performance Determination of Novel Design Eddy Current Separator for Recycling of Non-Ferrous Metal Particles

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