Abstract: A gravity-magnetic ore separator for concentrating magnetic or weakly magnetic minerals having a relatively high specific gravity is disclosed. The ore separator utilizes codirectional magnetic and gravitational forces to achieve separation capabilities in excess of that which can be achieved using gravity forces alone. Typically, the gravity-magnetic ore separator is formed by retrofitting a conventional gravity separator such as a spiral, cone, pinched sluice, etc. with magnets so as to enhance the separation capability of the conventional gravitational ore separator. Means are provided to prevent build up of magnetic material on the surface over which the ore flows.

Abstract: A rotary magnetic separator in which there are 4, 6, 8 or any greater even number of rotor plates and at least one yoke structure having 4, 6, 8 or any greater even number of legs corresponding to the number of rotor plates, the legs being arranged in two sets having equal numbers. A winding structure is provided for each set and energized such that the legs of one set present an opposite polarity pole to the legs of the other set. The central section of the or each yoke structure has an enlarged cross-section area arranged in step-wise manner.

Abstract: A method and apparatus for recovering magnetic particles from a fluid stream is provided. The fluid is contacted with a ferromagnetic element to cause attraction and collection of the particles. The ferromagnetic element is then heated to a temperature near or above the Curie temperature of at least one of (1) the ferromagnetic element and (2) collected magnetic particles. The collected magnetic particles are then disengaged from the ferromagnetic element. Preferably the ferromagnetic element is disposed in an applied magnetic field and the heating is preferred by passing alternating electric current through the element thereby causing sufficient vibration to disengage the particles.

Abstract: Method for cleaning particles trapped in a filtermatrix of a magnetic separator in the presence of a magnetic field. A cleaning fluid is passed through the filtermatrix which the filtermatrix is heated to a temperature higher than the Curie-temperature of the filtermatrix material.

Abstract: A machine to separate magnetically susceptible particles from a particulate diamagnetic gangue in a batch type process especially as in ore benefication. A frame pivotally mounts a normally horizontally oriented processing pan that tilts to allow dumping of gangue. A cradle-like spindle plate support having two perpendicularly related rectangular spindle plates is pivotably mounted on the frame above the ore pan so that each spindle plate may be pivotably moved to service one-half of the ore pan. Each spindle plate carries a plurality of spacedly arrayed, perpendicularly oriented, eccentrically rotatable magnetic spindles that may be moved to an operative position within the processing pan. Leveling mechanism is provided to level ore within the pan and vibrators are associated with the pan to agitate particulate matter therein during processing.

Abstract: A dump pit for grain has a magnet cylinder fixedly mounted therein with its axis extending through an access door opening on the dump pit. A non-magnetic shell is slideably arranged over the magnet and is adapted to be retracted through the door opening so that the tramp metal accumulating on the shell will simply fall off when the shell is retracted.

Abstract: A method and apparatus are disclosed for cleansing a matrix of a magnetic separator and more particularly a wet-magnetic separator having adherent magnetic material. The matrix is cleansed both with a liquid medium and an additional gaseous compressible medium. The introduction of the compressible medium is controlled in accordance with a measure of the adherent magnetic material present.

Abstract: A method and apparatus for separating ferrous particles from crushed siliceous slag and for providing successive size gradations of the siliceous material. Particles of the raw slag are introduced into a rotary receptacle including an upstanding side wall which defines a series of apertures having radially disposed axes. As the receptacle rotates, the particles are centrifugally projected into a magnetic field to separate the ferrous particles from the silica and to withdraw the ferrous particles onto a nonmagnetic belt-type carrier. The siliceous particles are projected by the receptacle over different distances proportional to their masses and are collected in successive cylindrical receiving bins concentric with the receptacle's axis of rotation. In some embodiments the separating operation takes place within an enclosure which is maintained at subatmospheric pressure.