Punching is a kind of pressure process method that punching dies are used in press sheet to put pressure on the plastic deformation or separation, for a certain shape and size of components.

Several main factors in the process of overflow size separation for granular materials are studied in this paper and the experimental results are introduced.

Test was made on separating iron from a low grade Vanadiferous titanomagnetite ore by a process of tailing discarding at a coarser size, staged grinding and staged low intensity magnetic separation.