Numerical Description of Interface, Flows in an Electromagnetic Process Devoted to Liquid/Liquid Extraction

摘要

In ladle metallurgical process,two liquid layers,a metallic layer below a salty or oxide layer,are separated by an interface where mass transfers occur thanks to redox reactions.Such mass transfers are strongly dependent on the stirring of each phase.By means of induction,a cold crucible reactor can melt,confine and stir,without any physical contact,liquids at very high temperature,with opportunities for continuous treatment.To work on metal/salt couples of interest to industry,we built a facility to control and measure the full kinetic transfer of a pollutant from one layer to another.A numerical simulation of the experimental reactor is presented here.We calculate the flows in both salty and metallic layers taking into account of all the present phenomena in each liquid phase(i.e.electromagnetic stirring,buoyancy,turbulence)as well as at the interface(i.e electromagnetic shaping,viscous shear driving).The implementation of the couplings needed for the complete simulation is presented.A focus is done on the numerical description of the shear stress near the interface.Stationary flows for two inductor positions complete this short article.