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

Ataallah Bahrami, Yousef Ghorbani, Mirsaleh Mirmohammadi, Behnam Sheykhi, Fatemeh Kazemi
2018 International Journal of Coal Science & Technology  
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/cm 3 ) on different grading fractions of tailing in an industrial scale (the weight of tail sample was five tons). Spiral concentrator was utilized
more » ... 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/cm 3 , 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/cm 3 are 17.75%, 33.80%, and 50%, respectively. Also, the cut point (q 50 ), which is the relative density at which particles report equally to the both products are 1.40, 1.67 and 1.86 g/cm 3 . 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/cm 3 specific weight is desirable compared with other specific weights.
doi:10.1007/s40789-018-0221-6 fatcat:xeda2bno4ndcdmd3tw6yt5tpeq