hydrodynamic characterization of mixer-settlers in extraction of zirconium with tbp

an experimental study has been made of the hydrodynamics of a stage mixer-settler to obtain appropriate design information. in this paper several tests were done according to full factorial design of experiments with high reliability, since each test recurs seven times and the results of  them are very close to each other(p=1bar and t=25 °c). sauter diameter in each test is determined with photographing of both mixer and settler and holdup quantity is measured by vacuum pump at the end of each test. in each test, dispersion height and dispersion length are determined by photographing of settler. sauter diameter has been compared with calderbank model and finally, a model has been suggested.