Dry beneficiation of Slovakian coal

Soong, Yee; Link, Thomas; Schoffstall, M.R; Gray, McMahan L.; Fauth, Daniel J.; Knoer, James P.; Jones, Jim R.; Gamwo, Isaac K.

doi:10.1016/s0378-3820(01)00187-4

Cited by 23 publications

(8 citation statements)

References 5 publications

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“…In triboelectric charging (friction or contact), clean coal generally charges positively and ash forming minerals charge negatively to make the separation [68][69][70]. Tribo-electric separations of coal and associated tribo-charging characteristics have been investigated by many researchers for successful separation of the mineral matter from coal [71][72][73][74][75][76][77].…”

Section: Electro-static Separationmentioning

confidence: 99%

Demineralization of low grade coal – A review

Meshram

Purohit

Sinha

et al. 2015

Renewable and Sustainable Energy Reviews

151

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Section: Electro-static Separationmentioning

confidence: 99%

Demineralization of low grade coal – A review

Meshram

Purohit

Sinha

et al. 2015

Renewable and Sustainable Energy Reviews

151

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“…The accumulated experience shows that dry cleaning of high-ash low-rank coal which has not been exposed to preliminary preparation is inefficient [1,2].…”

Section: Introductionmentioning

confidence: 99%

New Highly Efficient Dry Separation Technologies of Fine Materials

Arsentyev

Gerasimov

Дмитриев

et al. 2017

Proceedings of the Scientific-Practical Conference "Research and Development - 2016"

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During cleaning of high-ash coal mainly "wet" processes are used which require 5-10 tonnes water consumption per 1 tonne of coal. Arrangement of recycling water supply reduces demand in "fresh" water, but transportation of huge volumes of water slurry requires high-energy consumption. Dry cleaning of low-rank coal which has not been exposed to preliminary preparation is inefficient. It was suggested that to provide dry cleaning of high-ash coal it would be reasonable to expose it to chemical heat treatment first, and then to direct the treated coal mass for physical and mechanical cleaning to get the low-ash high-caloric product. It has been determined that in black coal exposed to medium temperature pyrolysis, as well as in brown coal, improvement of incombustible mineral fraction liberation is observed that facilitates further beneficiation with the use of a combination of high-intensity magnetic separation and triboelectrostatic separation. It has been determined that cleaned semicoke substantially exceeds both initial and cleaned coal by its qualities as a solid fuel, and tailings of semicoke dry cleaning can be utilised.

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“…Tribo electrostatic separation has gained considerable attention in recent years in the field of mineral processing [9][10][11][12], coal preparation [13][14][15][16][17][18][19][20] and recycling industries [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies were also carried out to know the tribocharging characteristics in pneumatic conveying [50][51][52][53][54][55][56][57][58][59][60][61][62][63] and gassolid fluidized bed system [64][65][66][67]. Different types of tribo-chargers such as vibratory feeder, cyclone, fluidized bed, pneumatically conveying through pipe were developed so that the target and reject particulates could attain higher differential charge during contact electrification [14,17,18,[68][69][70][71][72]. So that, highly charged particulate can deflect and separate when fall freely between two electrode plates connected to high DC voltage of opposite polarity in a free fall separator.…”

Section: Introductionmentioning

confidence: 99%