METHOD OF GENERATING HIGH-GRADIENT MAGNETIC FIELD AND DEVICE FOR SEPARATING SUBSTANCES BASED ON SAID METHOD Russian patent published in 2009 - IPC B03C1/02 

FIELD: physics.

SUBSTANCE: invention relates to magnetic separation methods and devices. In the method of creating a high-gradient magnetic field zone in an open Kittel type domain structure over free edges of matching faces of magnets, dimensions of the zone are set by thin plates made from soft magnetic material. The plates are placed at the free faces of the magnets such that, they form a narrow gap, lying directly above top edges of matching faces of the magnets. The magnets are made from neodymium-iron-boron, or samarium-cobalt, or iron-platinum. Each of the plates is joined to a device for movement on the surface of the faces of the magnets so as to regulate the width of the gap within the range of 0.01 to 0.1 mm. The plates have a thickness of 0.01 to 0.1 mm. The device for separating substances in a high-gradient magnetic field is based on an open domain structure type magnetic system in form of two rectangular permanent magnets interfaced by their side faces, with opposite direction of polarity of magnetic field. The magnets are mounted on a common base, which includes plate of soft magnetic material interfaced with lower faces of the magnets. On the upper surfaces of the magnets, there are thin plates of magnetic soft material, which form a narrow gap directly above upper edges of mating faces of the magnets. The magnets are made from neodymium-iron-boron, or samarium-cobalt, or iron-platinum. The plates have thickness of 0.01-1.0 mm. Each of the plates is joined to a device for movement on the surface of the faces of the magnets so as to regulate the width of the gap within the range of 0.01 to 0.1 mm. A substrate for the separated material, made from non-magnetic material, is placed directly above the gap.

EFFECT: generation of high-gradient magnetic field with regulated shape and gradient in a separation zone.

5 cl, 7 dwg