Fluid flow and mixing process in a bottom stirring electrical arc furnace with multi-plug

Fluid flow and mixing process in a bottom stirring electrical are furnace ( EAF) with the single- and multi-plug are experimentally and numerically stu died. A homogeneous fluid with a spatially variable density is used to mode l the gas-liquid flow, k-epsilon turbulence model is employed to calculate the effective viscosity. The five layouts are selected to examine the mixin g times. The mixing time is defined as the function of the diameter, number , location of plugs and the tracer injection point. The results show that t he Variation of mixing time is not obvious with the increasing of plug diam eter, but the stirring efficiency is getting better when plug number is inc reased and distributed in deep and off-central region in vessel. This is be cause the angular velocities occur and the more stirring energy is obtained in such layouts.