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F locculation is a widely used method for dewatering fine coal tailings. Flocs must resist to the shear stresses during the following processes such as f lotation, cyclone separation, and pumping. Therefore, the strength of the f locs must be considered during f locculation. In this study, the fine coal tailings were dewatered with an anionic f locculant (SNF-923) at various dosages, and the f loc size of the coal tailings was characterized using a laser diffraction particle size analyzer with respect to time in order to determine the change in the f loc size and hence the f loc strength. The results of this study clearly indicated that the determination of the f loc size with a laser particle size analyzer could be a simple and good method to observe the f locculation efficiency in terms of the f loc strength. INTRODUCTION

Characterization of Flocs in Dewatering of Coal Plant Tailings