Comparative study of the effect of particle size on flotation kinetics of raw and waste coal
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Date
2025
Authors
Sokolović, Jovica
Djolović, Ivana
Tanikić, Dejan
Štirbanović, Zoran
Ilic, Ivana
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Source
Minerals
Volume
15
Issue
7
Abstract
This study examines the influence of particle size on the flotation kinetics parameters of both raw and waste fine coal originating from the anthracite mine “Vrška Čuka”, Serbia. Flotation kinetics modeling was performed using MATLAB for nonlinear regression analysis, based on coal flotation test data. The correlation between total combustible recovery and flotation time was determined using the following models: Classical, Klimpel, Kelsall, Modified Kelsall, and Fully Mixed. The coefficients of determination range from 0.9724 (the Klimpel model) to 1 (the modified Kelsall model) for raw coal and from 0.8609 (the Klimpel model) to 0.9981 (the modified Kelsall model) for waste coal. Although both the Classical and Modified Kelsall models demonstrated a good correlation with the experimental data, the Modified Kelsall model provided a slightly better fit. The maximum values of the flotation rate constant (k) for both coals were obtained for the particle size-class (−0.1 + 0.053) mm for the Classical model and (−0.2 + 0.1) mm for the modified Kelsall model. The relation between flotation kinetics constant (k) and average particle size value (dsr) was estimated for the Classical model and the modified Kelsall model. It was observed that the flotation kinetics constant (k) for coal particle size could be predicted satisfactorily.
Description
Keywords
coal, particle size, flotation kinetics, classical model, modified Kelsall model
Citation
DOI
10.3390/min15070749
Scopus
ISSN
2075-163X
ISBN
License
ARR