By Maurice C. Fuerstenau, Graeme Jameson, Roe-Hoan Yoon
''Froth Flotation: A Century of Innovation comprehensively describes state of the art study and perform in mineral froth flotation a century after its creation. famous specialists from all over the world supply in-depth insurance on many features of flotation, together with the ancient features; basics; chemistry; flotation cells, modeling, and simulation; and flotation plant perform. This commemorativeRead more...
summary: ''Froth Flotation: A Century of Innovation comprehensively describes cutting-edge study and perform in mineral froth flotation a century after its creation. famous specialists from world wide offer in-depth assurance on many points of flotation, together with the old facets; basics; chemistry; flotation cells, modeling, and simulation; and flotation plant perform. This commemorative quantity is a useful reference for execs, researchers, and graduate students.''--BOOK JACKET
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Extra info for Froth flotation : a century of innovation
Example text
In much of the early flotation literature, there are discussions of how low the adsorption density of collector is for flotation. A subsequent detailed study of the flotation of chalcocite and pyrite using the electrochemical flotation cell, together with determination of the amount of xanthate collector adsorbed, was carried out by Gebhardt and Richardson (1987). Their results for the flotation of these two sulfides individually are plotted in Figure 9. Collection of chalcocite occurs by chemisorption.
The lower part of Figure 15 clearly shows that corundum responds to © 2007 by the Society for Mining, Metallurgy, and Exploration. All rights reserved. Electronic edition published 2009. W. Fuerstenau and Herrera-Urbina 1989. FIGURE 16 Effect of the PZC on the flotation of several different oxide minerals with physisorbing anionic (SDS) and cationic (DAC) collectors anionic collectors at pH values below the PZC where corundum is positively charged, and to the cationic collector at higher pH values where corundum is negatively charged.
At about 10–4 M DAA, there are abrupt changes in the amount of aminium ions adsorbed and the zeta potential becomes sharply positive. This is because the hydrophobic bonding contribution to the adsorption free energy dominates, that is, Nφ > zFψδ . It is also seen that the onset of rapid flotation occurs under conditions where hemimicelles begin to form, clearly indicating that good flotation depends on strong collector adsorption in the Stern plane. If the driving force for the adsorption of physisorbing surfactants were only electrostatic, flotation with such collectors would be limited.