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

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


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Electronic edition published 2009. 2 ft/sec2), respectively, and remained constant for all simulations. The experimental results were based on those given by Young (1999; Young and Klima, 2000). The results are presented in the form of fractional recovery (partition) curves as applied to size separations. They show the fraction of feed material of a particular size that will report to the coarse (underflow) stream. These curves can be used to estimate the separation or “cut” size of the separation.

Garside. R. 1979. Particle mixing and classification in liquid fluidised beds. Trans. IChemE. 57:95–103. U. 1986. A predictive model for the equilibrium composition and inversion of binary-solid liquid fluidised beds. Chem. Engng. Sci. 41(2):379–387. , and Mondal, K. 1999. Dynamic modelling of fine particle separations in an hindered bed classifier. SME Annual Meeting, Denver, Colorado, preprint number 99–170. © 2003 by the Society for Mining, Metallurgy, and Exploration. All rights reserved. Electronic edition published 2009.

In this way a series of samples corresponding to different elevations of the vessel were produced. The average density of the particles present in each sample was then measured using pycnometry, and the ash content determined. 0 mm. A relatively high fluidization rate was used initially to ensure all of the particles were suspended. The rate was also oscillated for a brief period and then lowered to a fixed rate. At the lower fluidization rate, a high proportion of the particles formed a packed bed on the base of the vessel.

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