Cleaning study of a low-rank lignite with DMS, Reichert spiral and flotation

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dc.authoridSivrikaya, Osman/0000-0001-8146-5747
dc.contributor.authorSivrikaya, Osman
dc.date.accessioned2025-01-06T17:43:31Z
dc.date.available2025-01-06T17:43:31Z
dc.date.issued2014
dc.description.abstractThe cleaning potential of a low-rank lignite coal has been evaluated via dense medium separation (DMS), Reichert spiral and flotation techniques. The washability characteristic of the lignite was investigated with laboratory sink and float tests. Solutions of zinc chloride (ZnCl2) with specific gravities ranging from 1.3 to 1.9 were used as dense medium liquid. The as-received raw lignite sample was sieved into three size fractions (-100 + 25 mm; -25 + 1.5 mm; -1.5 mm) and washability characteristics of the former two fractions were separately investigated. The latter fine fraction was cleaned using both DMS and Reichert spiral techniques under different operational parameters. Flotation tests were conducted using the -150 mu m fraction. Clean coal characteristics and recoveries were determined after each experiment. Elementary ash and +/- 0.1 relative specific gravity curves showed that this low-rank coal can be classified as difficult to clean'' due to its high content of near-gravity materials at specific gravities lower than 1.7. However, about 50% and 40% of the raw coal (3571 kcal/kg) can be obtained as clean coal with calorific values of 5400 kcal/kg for the coarse fraction and 5600 kcal/kg for the fine fraction, by DMS and Reichert spiral methods, respectively. The ash contents (14-18%) and calorific values (6022-5582 kcal/ kg) of the cleaned coarse and fine fractions are suitable for use in industry. Low calorific value (about 2500 kcal/kg) middling and tailing can be used in properly constructed thermal electric power plants. (C) 2013 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.fuel.2013.11.061
dc.identifier.endpage258
dc.identifier.issn0016-2361
dc.identifier.issn1873-7153
dc.identifier.scopus2-s2.0-84890518215
dc.identifier.scopusqualityQ1
dc.identifier.startpage252
dc.identifier.urihttps://doi.org/10.1016/j.fuel.2013.11.061
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2674
dc.identifier.volume119
dc.identifier.wosWOS:000329212100031
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofFuel
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectLignite coal
dc.subjectWashability characteristics
dc.subjectDense medium separation
dc.subjectGravity concentration
dc.subjectFlotation
dc.titleCleaning study of a low-rank lignite with DMS, Reichert spiral and flotation
dc.typeArticle

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