Permanent magnet high intensity separator

Claim 3

A magnetic separator, wherein mixed magnetic and non-magnetic particles are supplied as a slurry to the outer surface of a hollow separator drum rotatable on a horizontal axis, for subjection to inward gravitational force and vibratile and magnetic force parallel to the drum axis so that magnetic particles emerge inwardly from said drum for collection at a different location in the rotation thereof from that of which non-magnetic particles emerge for collection, said separator comprising, in combination: a hollow support cylinder having perforations positioned therearound in axially spaced rows extending perpendicularly to the axis of the cylinder; means mounting said cylinder with its axis horizontal for rotation thereabout; annular mounting flanges secured in substantially liquid tight relation to the outside of said cylinder between the rows of perforations therein; angularly spaced partitions secured between said flanges, in substantially liquid tight relation to said flanges and said cylinder, to extend outwardly from said cylinder in planes passing through the axis thereof, whereby to define with said flanges independent, axially adjacent circular arrays of independent chambers; a plurality of filter matrices formed of plural layers of magnetically susceptible screen material sized and shaped to be received in said chambers with said layers orthogonal to the axis of rotation of said cylinder; means for supplying the slurry to be separated to the upper outer surface of said matrices at a first angular location around the cylinder, for gravitationally actuated passage therethrough and inward discharge through the perforations in said cylinder; magnetic means of limited angular extent located around said cylinder between the rows of chambers for delaying the passage through said matrices of magnetic particles in said slurry, to substantially inhibit said passage of said magnetic particles during a predetermined angular portion of the rotation of said drum, while permitting passage of non-magnetic particles; separate means positioned within said cylinder for receiving liquid-borne non-magnetic particles gravitationally discharged from different locations of said drum; and flow control members extending said partitions inwardly of said cylinder to prevent peripheral flow, around the inner surface of said cylinder, of liquid discharged through the perforations.

Claim 4

A magnetic separator, wherein mixed magnetic and non-magnetic particles are supplied as a slurry to the outer surface of a hollow separator drum rotatable on a horizontal axis, for subjection to inward gravitational force and vibratile and magnetic force parallel to the drum axis so that magnetic particles emerge inwardly from said drum for collection at a different location in the rotation thereof from that of which non-magnetic particles emerge for collection, said separator comprising, in combination: a hollow support cylinder having perforations positioned therearound in axially spaced rows extending perpendicularly to the axis of the cylinder; means mounting said cylinder with its axis horizontal for rotation thereabout; annular mounting flanges secured in substantially liquid tight relation to the outside of said cylinder between the rows of perforations therein; angularly spaced partitions secured between said flanges, in substantially liquid tight relation to said flanges and said cylinder, to extend outwardly from said cylinder in planes passing through the axis thereof, whereby to define with said flanges independent, axially adjacent circular arrays of independent chambers; a plurality of filter matrices formed of plural layers of magnetically susceptible screen material sized and shaped to be received in said chambers with said layers orthogonal to the axis of rotation of said cylinder; means for supplying the slurry to be separated to the upper outer surface of said matrices at a first angular location around the cylinder, for gravitationally actuated passage therethrough and inward discharge through the perforations in said cylinder; magnetic means of limited angular extent located around said cylinder between the rows of chambers for delaying the passage through said matrices of magnetic particles in said slurry, to substantially inhibit said passage of said magnetic particles during a predetermined angular portion of the rotation of said drum, while permitting passage of non-magnetic particles; separate means positioned within said cylinder for receiving liquid-borne non-magnetic particles gravitationally discharged from different locations of said drum; and flow control members extending said partitions inwardly of said cylinder to prevent peripheral flow, around the inner surface of said cylinder, of liquid discharged through the perforations.

Claim 5

The structure of claim 2 in which said mounting means include further flanges spaced from and aligned with said first flanges to define therewith annular passages for fixed permanent magnets poled parallel to the axis of said drum, and apposed surfaces of pairs of said flanges are peripherally ribbed to retain said matrices against outward displacement.

Claim 6

The structure of claim 2 in which said matrices are of magnetic stainless steel screening, the diameter of and distance between the component wires of the screen and the number of layers of screen are chosen in accordance with the fineness of the slurry particles to be separated.

Claim 7

The structure of claim 2 in which said matrices are of galvanized steel wire screen, the diameter of and the distance between the wires of the screen and the number of layers of screen are chosen in accordance with the fineness of the slurry particles to be separated.

Claim 8

The structure of claim 2, and means directing water against the outer surfaces of said matrices subsequent to the supplying of said slurry, to promote the passage of particles therethrough.

Claim 9

The structure of claim 2 in which said partitions have tongues which extend through the perforations in said cylinder to support said flow control means in liquid tight relation against the inner surface of said cylinder.

Claim 10

The structure of claim 2 including fixed means within said cylinder for directing water downwardly against said flow control members and the inner surfaces of said drum, and through said perforations, to release particles trapped within said matrices for discharge outwardly from the bottom of said drum.