Recent Progress in Electrostatic Separation Technology

Higashiyama, Yoshio; Asano, K.

doi:10.1080/02726359808906786

Cited by 197 publications

(54 citation statements)

References 12 publications

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“…Moreover, many kinds of plastics have been electrostatically separated by using friction mixer with rotary blades [19], fluidized-bed tribo-electrification [20], or by using a vibrating feeder and electrostatic high voltage generator [21], etc. Generally, an electrostatic separator consists of feeding, charging and sorting zones. Higashiyama et al [22] summarized some examples of the application of the electrostatic separators, classified with respect to the charging methods and equipments (Table I). …”

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

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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%.

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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

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“…Numerous electrostatic separators have been developed for this purpose. Among them, charging via triboelectrification plays the main role [28]. Methods utilizing induction or corona charging have also been applied to the separation of coal from its impurities, but for the most part these methods have met with limited success [292].…”

Section: Purification Of Coalmentioning

confidence: 99%

Electrostatic Separation

Dötterl

Wachsmuth

Waldmann

et al. 2016

Ullmann's Encyclopedia of Industrial Chemistry

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“…Na equação acima β representa a posição angular das partículas no cilindro. [1][2][3][4][5][6] Figura 2. Forças no separador eletrostático de rotor.…”

Section: Aspectos Teóricosunclassified

“…De modo semelhante, as partículas mais finas são mais influenciadas pela carga de superfície e a fração não-condutora muitas vezes contém algumas partículas condutoras finas. [4][5][6][7] Vale salientar que a demanda ambiental de processamento de minerais a seco torna-se um ponto importante o que é uma característica do processo de separação eletrostática. …”

Section: Introductionunclassified

Uso Do Método Do Elemento Discreto Dem Como Aproximação Do Processo De Separação Eletrostática

França¹,

Carvalho²

2016

ABM Proceedings

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ResumoSeparação eletrostática é o termo usado para todas as tecnologias de processamento que utilizam forças elétricas que atuam sobre partículas carregadas ou polarizadas sob um campo elétrico estático. O comportamento das partículas depende das suas propriedades elétricas, geométricos e tamanho das partículas. Portanto, a separação de espécies é possível se os parâmetros do campo elétrico e as propriedades elétricas diferentes das partículas são apropriados para o processo. No separador eletrostático de rotor as forças elétricas, combinadas com as forças gravitacionais e centrífugas agem sobre as partículas e são responsáveis pela separação mineral. No presente trabalho as forças eletrostáticas que agem no processo serão substituídas por um modelo de contato de coesão Hertz-Mindlin com JKR. O resultado apresentado, embora com limitações, conseguiu-se fazer uma boa estimativa do processo e alguns dos parâmetros do separador. Com a presente simulação é possível descrever o processo de separação além de permitir a redução de despesas de testes práticos, melhorar a compreensão das relações fundamentais, simular as influências dos diferentes parâmetros e por fim, estimar eventuais aumento de desempenho. Palavras-chave: Separação eletrostática de rotor; Método dos elementos discretos. USE OF DISCRETE ELEMENT METHOD DEM AS APPROXIMATION OF ELECTROSTATIC SEPARATION PROCESS AbstractElectrostatic separation is the term used for all processing technologies that use electrical forces acting on charged or polarized particles in a static electric field. The behavior of the particles depends on their electrical properties, geometry and particle size. Therefore, the separation of species is possible if the parameters of the electric field and the different electrical properties of the particles are suitable for the process. In rotor electrostatic separator electrical forces coupled with the gravitational and centrifugal forces act on particles and are responsible for mineral separation. In this work the electrostatic forces that act in the process will be replaced by a cohesion contact Hertz-Mindlin model with JKR. The result presented, although with limitations, has managed to make a good estimate of the process and some of the separator parameters. With this simulation it is possible to describe the separation process and allows the reduction of practical testing costs, improve understanding of fundamental relationships, simulating the influences of different parameters and finally to estimate any performance increase.

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Recent Progress in Electrostatic Separation Technology

Cited by 197 publications

References 12 publications

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

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

Electrostatic Separation

Uso Do Método Do Elemento Discreto Dem Como Aproximação Do Processo De Separação Eletrostática

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