Material feed process and assembly for a rotary magnetic separator
AssigneesMichael John FLANAGAN, Rory Michael FLANAGAN
InventorMichael John FLANAGAN
Life of this patent
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Abstract
The invention provides a material feed process for magnetically separating magnetic and non-magnetic particles from a material feed by means of a magnetic roller separator wherein the process is characterised therein that particle separation is independent of centrifugal force, and where the process can equally well be applied to both wet and dry particle separation. The process specifically provides feeding the particles at an incident zone above the horizontal axis centre line, and separating the magnetic and non-magnetic particles at opposite rotational sides of the roller.
Claims20
A material feed process for magnetically separating magnetic and non-magnetic particles by means of a magnetic roller separator wherein the process is characterised therein that primary particle separation is independent of centrifugal force, the process comprising the steps of—
- providing a magnetisable roller [30] which rotates about an axis of rotation [32], and at least one magnet [34] which is configured to create a magnetic field [X] on the roller surface [42] for at least a portion of the roller surface [42], the magnetic field [X] being characterised therein that it is created at least partially to one side of the roller circumference relative to a vertical axis centre line [33] and opposite to the rotation direction [35];
- providing a feed hopper [36] and accompanying feed chute [38] for feeding material at an angle onto the roller surface [42];
- feeding the material directly into the magnetic field [X] on the roller surface [42] from one side of the roller [30], at an incident zone [α] which is above a horizontal axis centre line [39], such that primary particle separation occurs where feed particles first meet the roller surface [42] in that the non-magnetic particles [18] fall from the roller surface [42] at the point of impact, under the influence of gravity, at one side of the roller [30];
- while the magnetic particles [20] are trapped within the magnetic field [X] and carried over in the magnetic field [X] in the direction of rotation [35] towards an opposite side of the roller [30] and fall from the roller surface [42], under the influence of gravity, once they move outside of the magnetic field.
A material feed assembly for feeding particle material from a hopper [36] onto a magnetisable roller [30] of a magnetic roller separator for magnetically separating magnetic and non-magnetic particles from the material feed, the material feed assembly comprising—
- a magnetisable roller [30] which rotates about an axis of rotation [32], and at least one magnet [34] which is configured to create a magnetic field [X] on the roller surface [42] for at least a portion of the roller circumference, the magnetic field [X] being characterised therein that it is created at least partially to one side of the roller circumference relative to a vertical axis centre line [33] and opposite to the rotation direction [35];
- a feed hopper [36] and accompanying feed chute [38] for feeding material onto the roller surface [42], the feed chute [38] being disposed at an angle relative to the roller surface [42] such that material is fed directly into the magnetic field [X] on the roller surface [42] from one side of the roller [30], offset from the horizontal;
- the arrangement being such that primary particle separation occurs where feed particles first meet the roller surface [42] in that the non-magnetic particles [18] fall from the roller surface [42] at the point of impact, under the influence of gravity, while the magnetic particles [20] are trapped within the magnetic field [X] and carried over in the magnetic field [X] in the direction of rotation [35] towards an opposite side of the roller [30] and fall from the roller surface [42], under the influence of gravity, once they move outside of the magnetic field [X].
Dependencies are inferred from the claim text.