Effects of grinding time on morphology and collectorless flotation of coal particles

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dc.authoridEhsani, Arman/0000-0002-1758-8694
dc.authoridSivrikaya, Osman/0000-0001-8146-5747
dc.authoridKaymakoglu, Burcin/0000-0002-4885-6399
dc.contributor.authorGuven, O.
dc.contributor.authorKaymakoglu, B.
dc.contributor.authorEhsani, A.
dc.contributor.authorHassanzadeh, A.
dc.contributor.authorSivrikaya, O.
dc.date.accessioned2025-01-06T17:37:00Z
dc.date.available2025-01-06T17:37:00Z
dc.date.issued2022
dc.description.abstractThe impact of particle shape and surface properties has been mainly overlooked in the literature for different mineral systems. In this study, to investigate the effects of morphological variations, samples of clean coal parti-cles (-0.212 + 0.075 mm) were used and the flotation experimental in a batch condition (2 L Denver cell) were conducted in the absence of collectors by keeping the particle size constant. Binocular microscopic images were used to determine the shape factors of coal particles. A dry ball milling process was carried out as a function of grinding time (60-960 s) and representative samples were taken for determining both shape and floatability of particles. Further, particle-bubble attachment, zeta potential, roundness, surface roughness values and flotation kinetics were measured. It was indicated that by increasing milling duration from 60 s to 960 s, the round-ness and roughness increased from 0.792 to 0.809 and 23 nm to 57 nm, respectively. This led to increasing flotation rate constant from 0.4482 +/- 0.02 to 0.4856 +/-& nbsp;& nbsp;0.03 1/min. In addition, the theoretical calculations for energy barrier showed that upon increasing the roughness degree from 0 to 57 nm, the energy barrier signifi-cantly decreased from 2.79E-16 to 6.51E-17 J/m(2), which also proved our findings from a theoretical point of view. Thus, it was finally concluded that the more the roughness, the higher the flotation kinetics and the lower the energy barrier.(c) 2021 Elsevier B.V. All rights reserved.
dc.description.sponsorshipAdana Alparslan Turkes Science and Tech-nology UniversityScientific Research Coordination Unit [:20103003]
dc.description.sponsorship& nbsp;This study is supported by Adana Alparslan Tuerkes Science and Tech-nology UniversityScientific Research Coordination Unit (Project num-ber:20103003) . The authors would like to thank to Prof. Dr. Orhan Ozdemir and MSc. Khandjamts Batjargal from Istanbul University-Cerrahpasa in Istanbul, Turkey for their kind support in terms of bubble-particle attachment time and zeta potential measurements. OG would like to express appreciation to Prof. Dr. Jaroslaw W. Drelich from Michigan Technological University in Michigan, USA for discussion of the role of energy barrier in flotation systems.
dc.identifier.doi10.1016/j.powtec.2021.11.054
dc.identifier.issn0032-5910
dc.identifier.issn1873-328X
dc.identifier.scopus2-s2.0-85120429782
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.powtec.2021.11.054
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2073
dc.identifier.volume399
dc.identifier.wosWOS:000788070800012
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofPowder Technology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectCoal flotation
dc.subjectParticle shape
dc.subjectRoughness
dc.subjectFlotation kinetics
dc.subjectDLVO and X-DLVO theories
dc.titleEffects of grinding time on morphology and collectorless flotation of coal particles
dc.typeArticle

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