Review of electrical separation methods

Manouchehri, Hamid-Reza; Rao, K. Hanumantha; Forssberg, Eric

doi:10.1007/bf03402842

Cited by 7 publications

(4 citation statements)

References 47 publications

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“…[2] While most applications utilize differences in natural or induced conductivity of materials with the corona-drum type separators, triboelectric charging behavior with free-fall separators is also used at industrial scales. [3] A sample of applications of electrostatic processing reported in the literature is listed in Table 2. While this is not an exhaustive listing of applications, this table illustrates the potential range of applications for electrostatic processing of minerals.…”

Section: Mineral Applicationsmentioning

confidence: 99%

Triboelectric Belt Separator for Beneficiation of Fine Minerals

Bittner

Hrach

Gasiorowski

et al. 2014

Procedia Engineering

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Separation Technologies, LLC (ST) has developed a processing system based on triboelectric charging and electrostatic separation that provides the mineral processing industry a means to beneficiate fine materials with an entirely dry technology. The environmentally friendly technology can eliminate wet processing and required drying of the final material. The process requires little if any pre-treatment of the material other than grinding and operates at high capacity -up to 40 tonnes per hour by a compact machine. Energy consumption is low, approximately 1 kWh/tonnes of material processed. Since the only potential emission of the process is dust, permitting is typically relatively easy. In contrast to the other available electrostatic separation processes that are typically limited to particles greater than 75 μm in size, the ST belt separator is ideally suited for separation of very fine (<1 μm) to moderately coarse (300 μm) materials with very high throughputs. The triboelectric particle charging is effective for a wide range of materials and only requires particle -particle contact. The small gap, high electric field, counter current flow, vigorous particle-particle agitation and self-cleaning action of the belt on the electrodes are the critical features of the ST separator. The high efficiency multi-stage separation through charging / recharging and internal recycle results in far superior separations and is effective on fine materials that cannot be separated at all by conventional electrostatic techniques. Since 1995, this triboelectric technology has been extensively used for the beneficiation of coal fly ash with eighteen separators in place and over 130 machine-years of operation at locations in North America and Europe. The technology has been also successfully applied to the beneficiation of a variety of minerals including calcium carbonates, talc, and potash. Recently, dry electrostatic separation has been successfully demonstrated for beneficiation of phosphate ores.

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Section: Mineral Applicationsmentioning

confidence: 99%

Triboelectric Belt Separator for Beneficiation of Fine Minerals

Bittner

Hrach

Gasiorowski

et al. 2014

Procedia Engineering

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“…Electrostatic concentration is however mostly a dry concentration process of HMs and unfortunately employs a pre-heating treatment process (of temperatures between 100 °C to 150 °C) in order to remove humidity and also prepare the feed temperature [ 138 ]. Several researchers have investigated and reported the adoption of electrostatic concentration on HM deposits, mineral sands or alluvial deposits during physical processing/beneficiation of such minerals, describing the general principles as well as the application for physical separation or beneficiation purposes [ 11 , [137] , [138] , [139] , [140] , [141] , [142] , [143] , [144] , [145] , [146] , [147] , [148] , [149] , [150] , [151] , [152] ]. However, in addition to the required heat treatment process which involves a certain level of energy consumed during the process, almost all HM sands and RE mineral deposits requires a prior comminution process in order to grind the mineral deposit to particles and prepare them for concentration.…”

Section: Electrostatic Concentrationmentioning

confidence: 99%

Physical beneficiation of heavy minerals – Part 2: A state of the art literature review on magnetic and electrostatic concentration techniques

Nzeh,

Popoola

2024

Heliyon

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“…Znajdują zastosowanie również w procesach elektrografii, separacji materiałów zawierających frakcje dyspergowane, we wzbogacaniu rudy, itp. Udoskonalenie technologii elektronowo-jonowych pozwoliło na zastosowanie elektrycznych metod separacji, wykorzystujących różnice między właściwościami składników materiałów wyjściowych w zakresie przewodnictwa elektrycznego i przenikalności dielektrycznej na skalę przemysłową [1][2][3][4][5]. Ponadto, separacja elektryczna nie wymaga wykorzystania wody.…”

Section: Wstępunclassified

Separacja proszków węglowych o dużym stopniu rozproszenia za pomocą metody tryboelektrycznej

Chabecki¹

2019

ELECTROTECHNICAL REVIEW

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Separacja proszków węglowych o dużym stopniu rozproszenia za pomocą metody tryboelektrycznej Streszczenie. W artykule zostały przeanalizowane warunki rozdzielenia materiałów węglowych za pomocą metody tryboelektrycznej. Została opracowana konstrukcja i wykonane urządzenie powietrznej separacji tryboelektrycznej z oddzielaczem bębnowym. W drodze eksperymentu ustalono, że zastosowanie wibracji podczas podawania proszku do bębna oraz obróbka cieplna proszków istotnie wpływa na wartość tryboładunków. W celu uzyskania dobrego wyniku rozdzielenia materiałów węglowych konieczne jest osuszenie. Materiał osusza się w temperaturze 100-120 о С. Otrzymane za pomocą separacji frakcje węglowe zastosowano do budowy superkondensatorów. Określono pojemność właściwą. Ustalono, że największą pojemność właściwą posiada materiał zawierający cząstki o wymiarach 1-10 µm.

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Review of electrical separation methods

Cited by 7 publications

References 47 publications

Triboelectric Belt Separator for Beneficiation of Fine Minerals

Triboelectric Belt Separator for Beneficiation of Fine Minerals

Physical beneficiation of heavy minerals – Part 2: A state of the art literature review on magnetic and electrostatic concentration techniques

Separacja proszków węglowych o dużym stopniu rozproszenia za pomocą metody tryboelektrycznej

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