The beneficiation of tailing of coal preparation plant by heavy-medium cyclone

Bahrami, A., Ghorbani, Y., Mirmohammadi, M. , Sheykhi, B. and Kazemi, F. (2018) The beneficiation of tailing of coal preparation plant by heavy-medium cyclone. International Journal of Coal Science and Technology, 5 (3). pp. 374-384. ISSN 2095-8293

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Dense-medium cyclones have been used for beneficiation of fine particles of coal. In this study, the usability of cyclones in the beneficiation of tailings of a coal preparation plant was investigated. For this purpose, separation tests were conducted using spiral concentrator and heavy medium cyclones with the specific weight of medium 1.3–1.8 (g/cm3) on different grading fractions of tailing in an industrial scale (the weight of tail sample was five tons). Spiral concentrator was utilized to beneficiate particles smaller than 1 mm. In order to evaluate the efficiency of cyclones, sink and float experiments using a specific weight of 1.3, 1.5, 1.7 and 1.9 g/cm3, were conducted on a pilot scale. Based on the obtained results, the recovery of floated materials in cyclones with the specific weight of 1.40, 1.47 and 1.55 g/cm3 are 17.75%, 33.80%, and 50%, respectively. Also, the cut point (ρ50), which is the relative density at which particles report equally to the both products are 1.40, 1.67 and 1.86 g/cm3. The probable errors of separation for defined specific weights for cyclones are 0.080, 0.085 and 0.030, respectively. Also, the coefficients of variation was calculated to be 0.20, 0.12 and 0.03. Finally, it could be said that the performance of a cyclone with a heavy medium of 1.40 g/cm3 specific weight is desirable compared with other specific weights.

Keywords:Beneficiation, Coal, Coal industry, Coal preparation, Concentration (process), Density (specific gravity), Grading, Tailings, Coal preparation plants, Coefficients of variations, Dense medium cyclone, Heavy media cyclones, Heavy medium cyclones, Industrial scale, Spiral concentrators, Tromp curve, Scales (weighing instruments)
Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
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ID Code:54536
Deposited On:05 Jul 2023 16:25

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