Advances in gravity concentration - download pdf or read online

By R.Q. Honaker, W.R. Forrest

ISBN-10: 0873353072

ISBN-13: 9780873353076

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Engng. Sci. 19:897–917. © 2003 by the Society for Mining, Metallurgy, and Exploration. All rights reserved. Electronic edition published 2009. Modeling of Hindered-settling Column Separations Bruce H. Kim*, Mark S. Klima*, and Heechan Cho† A phenomenological model was developed to describe the operation of a hindered-settling column. The model is based on the convection-diffusion equation as applied to hindered-settling conditions. Simulations were carried out to evaluate column performance as a function of operating and design variables, including teeter water rate, bed height, solids feed rate, and column height.

For a superficial fluidization velocity of U and suspension containing particles with a total volume fraction of φ, the particles forming the suspension have a common slip velocity, Uslip, of U/(1 – φ), assuming the effects of dispersion can be neglected. These results are listed in Table 3. 0 mm/s. The higher rate allowed faster settling particles, previously comprising the bed on the base of the container, to participate in the experiment by being suspended. Figure 5 shows a series of curves describing combinations of particle size and density that yield a common slip velocity.

All rights reserved. Electronic edition published 2009. HINDERED SETTLING IN LIQUID FLUIDIZED BEDS Barnea, E. and Mizrahi, J. 1973. A generalized approach to the fluid dynamics of particulate systems, Part 1. General correlation for fluidization and sedimentation in solid multiparticle systems. The Chemical Engineering Journal. 5:171. K. 1972. Sedimentation in a dilute dispersion of spheres. J. Fluid Mech. 52. part 2. 245–268. K. 1982. Sedimentation in a dilute polydisperse system of interaction spheres.

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Advances in gravity concentration by R.Q. Honaker, W.R. Forrest


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