Experimental investgation into the application of a magnetic cyclone for dense medium separation

摘要

The density differential between the overflow andunderflow streams is one of the critical measurable parameters inthe operation of dense medium cyclones .Our investigation of theapplication of a magnetic cyclone to dense medium separationshowed that by a judicious positioning of a solenoid magnetalong the axis of the cyclone ,and by adjusting the strength of themagnetic field ,it is possible to control the density differential inthe cyclone .It is also possible to influence the cut-point densityand the sharpness of the Tromp surve and the selectivity ofseparation .Typically ,it was possible to vary the densitydifferential in a wide range from –0.1 to 0.8g/cm3 .The cut-pointdensity was controlled between 2.8 and 3.2 g/cm3 for 270Dferrosilicon ,at a feed density of 2.35 g/cm3 , and between 3.1and 3.4 g/cm3 for Cyclone 60 ,at a feed density of 2.45g/cm3 .The Ep of separation was observed to decrease from 0.05to 0.05 by the application of the magnetic field .accompanied byreduced cut-point density.