MAGNET AND DEVICE FOR MAGNETIC DENSITY SEPARATION

摘要

A planar magnet for magnetic density separation, comprising an array of pole pieces succeeding in longitudinal direction of a mounting plane, each pole piece having a body extending transversely along the mounting plane with a substantially constant cross section that includes a top segment that is curved to distribute the magnetic field associated with the top surface of the pole piece such that its strength transverse to the mounting plane is substantially uniformly distributed in planes parallel to the mounting plane, the curved top segments having a width (w) in longitudinal direction of the mounting plane and a maximum height (h) transverse to the mounting plane, wherein the top segments of successive pole pieces are unequal in height and/or width.