Abstract
AbstractA molten salt layer composed of PbO‐PbCl2 is formed when the vaporization rate of PbCl2 is slower than its formation rate. Kinetic analysis has been performed of the chlorination‐vaporization reaction of Pb‐oxychloride in the pyrometallurgical recycling process of dust and ash. Simulation calculations for the bulk diffusion have been carried out, and also by applying the quasi‐steady principle the profiles of relative chemical potentials, compositions, and mass flux across the molten salt as well as the intermediate compound layers of Pb‐oxychloride, have been obtained. For the chlorination‐vaporization reaction, the effects of temperature and Cl‐potential in the gas phase (log(P2HCl / PH 2O) have been evaluated.
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