Shahrood University of Technology Journal of Mining and Environment 2251-8592 Volume 1 Number 1 2010 04 12 An investigation of the particle size effect on coal flotation kinetics using multivariable regression 5 10.22044/jme.2010.5 EN M. Kor Faculty of Mining, Petroleum and Geophysics, Shahrood University of Technology; Shahrood, Iran E. Abkhoshk Islamic Azad University, Research and Science Campus, Tehran, Iran Kh. Gharibie Faculty of Mining, Petroleum and Geophysics, Shahrood University of Technology; Shahrood, Iran S. Z. Shafaei Faculty of Mining, Petroleum and Geophysics, Shahrood University of Technology; Shahrood, Iran Journal Article 2011 04 12 An attempt has been made in this paper to investigate the effect of particle size distribution on coal flotation kinetics. The effect of particle size (Ps) on kinetics constant (k) and maximum theoretical flotation recovery (RI) was investigated while other operational parameters were kept constant. The relationship between flotation kinetics constant and theoretical flotation recovery with particle size was estimated with nonlinear equations. Analysis of variance showed that the effect of particle size on the kinetics constant was statistically significant at 95% confidence level. However, it was not significant on maximum theoretical flotation recovery (RI). Different regression methods were conducted in order to model the effect of coal particle size on flotation kinetics. Results indicated that the quadric regression method gave better prediction of the cumulative recovery for different particle size fractions. The correlation coefficient (R2) values of this model were 0.99, 0.996, 0.98, 0.98 and 0.97 for average of particle sizes of 37.5 µm, 112.5 µm, 225 µm, 400 µm and 625 µm respectively. https://jme.shahroodut.ac.ir/article_5_065380def138c0c4f894375f4ad9ea06.pdf