Electrostatic Separation

Abstract

The article contains sections titled: 1. Introduction 2. General Principles 2.1. Charging by Induction or Corona Discharge 2.1.1. Charging by Induction 2.1.2. Charging by Corona Discharge 2.1.3. Separators 2.2. Triboelectric Charging 2.2.1. Mechanism 2.2.2. Equipment 2.3. Dielectrophoresis 3. Applications 3.1. Mineral Processing 3.1.1. Potash Ores 3.1.2. Other Minerals 3.2. Purification of Coal 3.3. Recycling Processes 3.3.1. Inductive or Corona Charging 3.3.2. Triboelectrification 3.4. Others

Electrostatic Separation of Ajwain ( Trachyspermum ammi L.) Seeds Using a Roll‐Type Corona Discharge System

“…Particles fall onto the rotating roller, where they adhere to its surface based on their electric charge and material properties within an electric field. If a field electrode is present, particles may also be attracted to it (Brands et al 2000).…”

Electrostatic Separation of Ajwain ( Trachyspermum ammi L.) Seeds Using a Roll‐Type Corona Discharge System

“…Particles fall onto the rotating roller, where they adhere to its surface based on their electric charge and material properties within an electric field. If a field electrode is present, particles may also be attracted to it (Brands et al 2000).…”

Experimental investigation of an optimised tribocharger design for space resource utilisation

“…Dry mineral processing technologies have been considered previously (e.g., (Wills and Finch, 2015;Kelly and Spottiswood, 1989a;Kelly and Spottiwood, 1989;Kelly and Spottiswood, 1989b;Manouchehri et al, 2000a;Manouchehri et al, 2000b;Trigwell et al, 2003;Dwari et al, 2009;Bittner et al, 2014;Bilici et al, 2011;Brands et al, 2001;Ballantyne and Holtham, 2010;Ballantyne and Holtham, 2014;Ireland, 2010a;Ireland, 2010b;Ireland and Nicholson, 2011;Ireland, 2012;Lawver and Dyrenforth, 1973;Dwari and Rao, 2007)). The use of dry methods at industrial scale is limited to ilmenite/rutile enrichment from beach sands, iron ore processing, and fly ash cleaning from coal (Wills and Finch, 2015;Bittner et al, 2014;Lawver and Dyrenforth, 1973;Dwari and Rao, 2007).…”

The effect of surface charge and KNO3 additive on the crystallization of potassium chloride

“…The surface conductivity of a given particle is the most important physical property. On one hand, charging of a particle is facilitated by high surface conductivity [17].…”

“…The nonconductive particles are not significantly charged during their residence on the rotor or their charge will be too small to affect motion towards the high voltage electrode. Therefore they remain on the rotor until they fall into a collecting bin under the influence of gravitational force or will be scraped down by a brush [17].…”

Electrostatic Separation of Ajwain ( Trachyspermum ammi L.) Seeds Using a Roll‐Type Corona Discharge System

“…Particles fall onto the rotating roller, where they adhere to its surface based on their electric charge and material properties within an electric field. If a field electrode is present, particles may also be attracted to it (Brands et al 2000).…”

Experimental investigation of an optimised tribocharger design for space resource utilisation

“…Dry mineral processing technologies have been considered previously (e.g., (Wills and Finch, 2015;Kelly and Spottiswood, 1989a;Kelly and Spottiwood, 1989;Kelly and Spottiswood, 1989b;Manouchehri et al, 2000a;Manouchehri et al, 2000b;Trigwell et al, 2003;Dwari et al, 2009;Bittner et al, 2014;Bilici et al, 2011;Brands et al, 2001;Ballantyne and Holtham, 2010;Ballantyne and Holtham, 2014;Ireland, 2010a;Ireland, 2010b;Ireland and Nicholson, 2011;Ireland, 2012;Lawver and Dyrenforth, 1973;Dwari and Rao, 2007)). The use of dry methods at industrial scale is limited to ilmenite/rutile enrichment from beach sands, iron ore processing, and fly ash cleaning from coal (Wills and Finch, 2015;Bittner et al, 2014;Lawver and Dyrenforth, 1973;Dwari and Rao, 2007).…”

The effect of surface charge and KNO3 additive on the crystallization of potassium chloride

“…The surface conductivity of a given particle is the most important physical property. On one hand, charging of a particle is facilitated by high surface conductivity [17].…”

“…The nonconductive particles are not significantly charged during their residence on the rotor or their charge will be too small to affect motion towards the high voltage electrode. Therefore they remain on the rotor until they fall into a collecting bin under the influence of gravitational force or will be scraped down by a brush [17].…”

Electrostatic Separation of Ajwain ( Trachyspermum ammi L.) Seeds Using a Roll‐Type Corona Discharge System

“…Particles fall onto the rotating roller, where they adhere to its surface based on their electric charge and material properties within an electric field. If a field electrode is present, particles may also be attracted to it (Brands et al 2000).…”

Experimental investigation of an optimised tribocharger design for space resource utilisation

“…Dry mineral processing technologies have been considered previously (e.g., (Wills and Finch, 2015;Kelly and Spottiswood, 1989a;Kelly and Spottiwood, 1989;Kelly and Spottiswood, 1989b;Manouchehri et al, 2000a;Manouchehri et al, 2000b;Trigwell et al, 2003;Dwari et al, 2009;Bittner et al, 2014;Bilici et al, 2011;Brands et al, 2001;Ballantyne and Holtham, 2010;Ballantyne and Holtham, 2014;Ireland, 2010a;Ireland, 2010b;Ireland and Nicholson, 2011;Ireland, 2012;Lawver and Dyrenforth, 1973;Dwari and Rao, 2007)). The use of dry methods at industrial scale is limited to ilmenite/rutile enrichment from beach sands, iron ore processing, and fly ash cleaning from coal (Wills and Finch, 2015;Bittner et al, 2014;Lawver and Dyrenforth, 1973;Dwari and Rao, 2007).…”

The effect of surface charge and KNO3 additive on the crystallization of potassium chloride

“…The surface conductivity of a given particle is the most important physical property. On one hand, charging of a particle is facilitated by high surface conductivity [17].…”

“…The nonconductive particles are not significantly charged during their residence on the rotor or their charge will be too small to affect motion towards the high voltage electrode. Therefore they remain on the rotor until they fall into a collecting bin under the influence of gravitational force or will be scraped down by a brush [17].…”