Influence of the pulse wave in the stratification of high density particles in a JIG device
Abstract
A study of particle motion subjected to four different pulsation profiles on a pulsated fluidized bed jig concentrator was carried out. The profiles used in the simulation were – sinusoidal, triangle, sawtooth-backward and sawtooth-forward. Two-dimensional local velocities of the water flow field were calculated from the continuity and momentum equations by CFD techniques implementing SIMPLE algorithm. The particle motion is modeled by a forces balance applying the Newton’s second law of motion. Liquid-solid interactions forces are calculated by the mathematical Euler-Lagrangian model extended to a particle suspension having a wide size and density distribution. To analyze the particle motion in jig, we derived a trajectory equation for the response time of particle that include virtual mass, gravity, pressure gradient, drag and Basset forces. The study demonstrates significant differences in the particle trajectories for various pulsation profiles applied to the boundary condition at the inlet to the jig chamber.References
C. K. Gupta, Chemical Metallurgy Principles and Practice. Weinheim, 2003.
Y. Tsuji, T. Kawaguchi, and T. Tanaka, “Discrete particle simulation of two-dimensional fluidized bed,” Powder Technol., vol. 77, no. 1, pp. 79–87, Oct. 1993.
F. W. Mayer, “Fundamentals of a potential theory of jigging process,” in Proc. 7th Int. Miner. Proc. Cong., 1964, pp. 75–86.
S. M. Viduka, Y. Q. Feng, K. Hapgood, and M. P. Schwarz, “CFD-DEM Iinvestigation of particle separations using a trapezoidal jigging profile,” in Ninth International Conference on CFD in the Minerals and Process Industries, CSIRO, 2012, no. December, pp. 1–8.
S. M. Viduka, Y. Q. Feng, K. Hapgood, and M. P. Schwarz, “CFD–DEM investigation of particle separations using a sinusoidal jigging profile,” Adv. Powder Technol., vol. 24, no. 2, pp. 473–481, Mar. 2013.
S. M. Viduka, Y. Q. Feng, K. Hapgood, and M. P. Schwarz, “Discrete particle simulation of solid separation in a jigging device,” Int. J. Miner. Process., vol. 123, pp. 108–119, 2013.
L. Dong, Y. Zhao, C. Duan, Z. Luo, B. Zhang, and X. Yang, “Characteristics of bubble and fine coal separation using active pulsing air dense medium fluidized bed,” Powder Technol., vol. 257, pp. 40–46, May 2014.
K. Asakura, M. Mizuno, M. Nagao, and S. Harada, “Numerical Simulation of Particle Motion in a Jig Separator,” in 5th Join ASME JSME Fluids Engineering Conference, 2007, pp. 385–391.
Y. K. Xia and F. F. Peng, “Numerical simulation of behavior of fine coal in oscillating flows,” Miner. Eng., vol. 20, no. 2, pp. 113–123, Feb. 2007.
Y. Xia, F. F. Peng, and E. Wolfe, “CFD simulation of fine coal segregation and stratification in jigs,” Int. J. Miner. Process., vol. 82, no. 3, pp. 164–176, Apr. 2007.
K. J. Dong, S. B. Kuang, a. Vince, T. Hughes, and a. B. Yu, “Numerical simulation of the in-line pressure jig unit in coal preparation,” Miner. Eng., vol. 23, no. 4, pp. 301–312, 2010.
A. B. Basset, A Treatise on Hidrodynamics Volumen II. London, 1888.
R. Di Felice, “Hidrodynamics of liquid Fluidisation,” Chem. Eng. Sci., vol. 50, no. 8, pp. 1213–1245, 1995.
G. K. Batchelor, An Introduction to Fluid Dynamics. Cambridge, United Kingdom: Cambridge University Press, 1967.
Y. D. Sobral, T. F. Oliveira, and F. R. Cunha, “On the unsteady forces during the motion of a sedimenting particle,” Powder Technol., vol. 178, no. 2, pp. 129–141, 2007.
Downloads
