Kinetics studies of ion flotation
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Wrocław University of Technology
Technical University of Częstochowa
Publication date: 1999-01-01
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Władysław Walkowiak   

Institute of Inorganic Chemistry and Metallurgy of Rare Elements, Wrocław University of Technology, 50-370 Wrocław, Wyb. Wyspiańskiego 27
Physicochem. Probl. Miner. Process. 1999;33(1):201-212
We present a review of kinetic studies on flotation methods with zero-, first-, second- and log-log models. We propose a general kinetic equation to evaluate literature data as a well as our own results. To calculate values of rate constants (k) and order of flotation (n) and determination coefficients (R2) Statistica Program was applied. An original method of floated ions concentration detection vs. time during each experiment by means of radioactive tracers has been proposed.We have verified chosen kinetics literature data showing values of k, n, and R2. Some unexpected kinetics calculations were received for data published by Skrylev and Legicenko (1981). We have found, on the example of zinc(II) ions, that where no sublate was precipitated in the aqueous phase, the order of flotation was close to one with good data fitting. In the presence of insoluble sublate in the aqueous solutions a characteristic inflection appears on flotation curves. Much better fitting is reached after dividing those curves into two parts; for the first stage we observed the flotation order to be close zero, and for the second stage the order of flotation was close one.
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