SLon WHIMS mainly consists of the pulsating mechanism,energizing coil,magnetic yoke,separating ring,feed and product boxes as shown in Figure.Expanded nets or round bars made of magnetic conductive stainless steel are used as matrix.While a direct electric current follows through the energizing coil,a magnetic field is built up in the separating zone.The ring with matrix rotates clockwise.Slurry from the feed box enters into matrix piles located in the separating zone.Magnetic particles are attracted from slurry onto the surface of the matrix,brought to the top of the ring where magnetic field is negligible,then flushed out into the concentrate box.Non-magnetic particles pass through the matrix and enter the tailing box under the combined force action of slurry pulsation,gravity,and hydrodynamic drag.
As the ring rotates vertically,flushing direction of mags is opposite to that of feed relative to each matrix pile,coarse particles can be flushed out without having to pass through the entire depth of matrix pile.The pulsating mechanism drives slurry in the separating zone up and down,keeping the particles the matrix pile in loose state,so that magnetic particle can be more easily captured by the matrix and nonmagnetic particles can be more easily dragged to the tailing box through the matrix pile.Obviously,opposite flushing and pulsation help to prevent matrix clogging,and pulsating helps to purity magnetic product.