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The kinetics of zinc silicate leaching in sodium hydroxide

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Academic year: 2018

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Fig. 1. XRD pattern of the zinc silicate concentrate. H: hematite, W: willemite, F: franklinite.
Fig. 2. (a) Speciation diagram of zinc hydroxy-complexes formed in alkaline systems.
Fig. 7. Plot of shrinking core model for chemical reaction control. (6 mol/L NaOH, 1 g/L solids, 600 min −1 , particle size 45–38 µm).
Fig. 8 shows the Log K app versus Log [NaOH] plot from which the reaction order with respect to the NaOH concentration was determined as 1.44±0.46

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