A single device carries out a plurality of washing processes for gradually reducing the amount of a magnetic particle solution in a reaction vessel. A first washing process includes a step for inserting a reaction vessel into a recess provided in the magnetic separation device to capture the magnetic substance using a plurality of magnets disposed along the peripheral direction of the recess such that the same pole faces the reaction vessel, a step for solution aspiration, a step for discharging liquid such that the surface of the liquid goes to a position higher than the upper edges of the magnets, and stirring the liquid. A second washing process includes a step for inserting the reaction vessel into the magnetic separation device and aspirating the liquid, discharging the liquid such that the surface of the liquid goes to a position lower than the upper edges of the magnets.

A magnet apparatus for generating a high gradient and/or high strength magnetic field, comprises: two main permanent magnets 2, 4 located side-by-side with oppositely oriented magnetic field polarities and end surfaces of opposite polarities next to one another, wherein the magnetic anisotropy of the magnets 2, 4 exceeds the magnetic induction of the material of the magnets 2, 4; and at least one mask 6 on a first end of each of the adjacent permanent magnets 2, 4, the masks 6 comprising a permanent magnet material covering adjacent end surfaces of the two permanent magnets 2, 4 with a gap 8 in the masks along a joining line between the two permanent magnets 2, 4 to form a zone of high-gradient magnetic field above the joining line; wherein the permanent magnet of each mask 6 is oriented with an opposite polarity to the main permanent magnet 2, 4 that it is attached to.

A magnetic separating conveyor output roll including a first plurality of magnetic rings, each of such magnetic rings having radially inner and radially outer ends, each such magnetic ring having annular north and south poles respectively positioned at its radially inner and radially outer ends; and including a second plurality of magnetic rings having radially inner and radially outer ends, each such magnetic ring having annular north and south poles respectively positioned at its radially outer and radially inner ends; wherein the first and second pluralities of magnetic rings are stacked in an alternating series along a rotation axis; wherein each magnetic ring's radial cross section is rectangular; wherein each magnetic ring includes a circumferential array of radially extending seams, the roll incorporating a plurality of adhesive bonds residing within such seams; the roll further incorporating magnetic armature effect resisting gaps between adjacent pairs of the magnetic rings.

A magnetic separator includes two parallel and spaced magnetic rods. Each magnetic rod includes a non-magnetic tubular body with a longitudinal axis and a chamber, a plurality of magnetic members nested in the chamber, and a plurality of spacers made of high magnetic permeability materials and respectively disposed between the adjacent magnetic members. The magnetic members in each magnetic rod are disposed with like poles adjacent each other. Poles of the magnetic members in one magnetic rod are opposite to poles of the nearest adjacent magnetic members in another magnetic rod. The width of each magnetic member in the longitudinal axis of the tubular body is larger than that of each spacer so that a matrix type magnetic flux lines can be formed by the grate magnetic separator.

Provided is a slant type magnetic separator including: a belt conveyor including a pair of conveying rollers and a belt wound around the conveying rollers in a caterpillar manner; first and second slant adjustment units adjusting slants of the belt conveyor. The slant type magnetic separator further includes: separated material discharge units separating and discharging materials to two sides and a lower end of the belt conveyor according to a magnitude of magnetism and a weight of the materials; a cleaning unit spraying washing water toward a surface of the belt conveyor; and scrapers pushing magnetically attached materials magnetically attached to the surface of the belt conveyor in the conveying direction of the belt conveyor. Accordingly, it is possible to consciously effectively separate and recover a large amount of weakly magnetic materials contained in a large amount of fly ash, sand, or the like having large processing capacity.

This disclosure describes microfluidic devices that include one or more magnets, each magnet being operable to emit a magnetic field; and a magnetizable layer adjacent to the one or more magnets, in which the magnetizable layer is configured to induce a gradient in the magnetic field of at least one of the magnets. For example, the gradient can be at least 10.sup.3 T/m at a position that is at least 20 m away from a surface of the magnetizable layer. The magnetizable layer includes a first high magnetic permeability material and a low magnetic permeability material arranged adjacent to the high magnetic permeability material. The devices also include a microfluidic channel arranged on a surface of the magnetizable layer, wherein a central longitudinal axis of the microfluidic channel is arranged at an angle to or laterally offset from an interface between the high magnetic permeability material and the low magnetic permeability material.

An electromagnet for a hydraulic system, such as an automatic transmission of a motor vehicle. The electromagnet may include an armature chamber filled with hydraulic medium, which may be fluidically connected to hydraulic lines of the hydraulic system, and may have an armature mounted therein. The armature may have an adjustable stroke and may include a shut-off body. The armature may divide the armature chamber into an opening-side chamber facing the flow opening, and an inner chamber facing away from it. During a stroke movement of the armature, an oil exchange may occur, during which a displacement volume of the hydraulic medium overflows from the opening-side chamber into the inner chamber. The electromagnet may further include a hydraulic medium reservoir, which may store a hydraulic medium having a higher degree of purity than the hydraulic medium in the hydraulic lines and which may be fluidically connected to the opening-side chamber.

A filter is used for removing metallic contaminants in a solvent used in microcircuit fabrication. The filter includes a filter housing including a filter membrane for filtering solvent including metallic contaminants, and a magnet arranged about the filter housing and configured to generate a magnetic field to attract the metallic contaminants prior to the metallic contaminants entering the filter membrane. The magnet is arranged such that the magnetic field of the magnet is greater in a periphery of the filter housing compared to a central portion of the filter housing.

A magnetic device for capturing metal wear particles in suspension in a lubrication fluid, the magnetic device being for inserting in a straight-line insertion direction of the magnetic device into a wall of a casing via a through orifice serving to put an inside volume of the casing containing the lubrication fluid into communication with an outside volume outside the casing, the magnetic device presenting a longitudinal axis X, the longitudinal axis X being for putting into coincidence with the direction for inserting the magnetic device into the casing, the magnetic device comprising a permanent magnet suitable for attracting the metal particles and a, presence-detector member for detecting the metal particles attracted by the permanent magnet.

A method for filtering magnetic particles includes spinning a filter including a plurality of pores within a substrate. The method further includes applying, subsequent to spinning the filter, an external magnetic field to the filter. The method includes disposing a solution including a first particle and a second particle onto the filter. The first particle includes a magnetic particle of interest. The method further includes separating the first particle from the second particle by capturing the first particle within a pore of the plurality of pores within the substrate.