RU2344880C1 - Magnetic separator - Google Patents

Abstract

FIELD: engines and pumps; mining.

SUBSTANCE: magnetic separator comprises two magnetic systems. Magnetic systems are arranged in the form of strips from rectangular prisms of neodymium-iron-boron containing alloys, which rotate around axis that passes through side faces into opposite sides. At the same time they rotate in horizontal plane for transfer of extracted magnetic material on non-magnetic plane with the possibility to change number of every drive rotations, and also to change distance from separator to transporters.

EFFECT: better extraction of valuable component.

1 cl, 2 dwg

Description

The invention relates to the field of mineral processing by magnetic separation.

A known magnetic separator of periodic action, the magnetic system of which is made in the form of permanent magnets rotating around a vertical axis under a non-magnetic plate with an analyzed mixture scattered on it with a thin layer [RF, AS No. 1651966, IPC V03C 1/6, publ. 05/30/91., Bull. No. 20].

The disadvantages of this apparatus are low productivity, operation only in periodic mode and low separation selectivity.

Closest to the proposed, in combination of essential features, is an electrodynamic separator containing a transporting body, receivers of separation products and a magnetic system made in the form of a disk mounted for rotation and located under the transporting body in a plane parallel to the plane of the latter, moreover, on the working surface The disk contains permanent magnets with alternating poles polarity around the disk perimeter [RF, a.s. No. 1139506, IPC V03C 1/24, publ. 02/15/85., Bull. No. 6, (prototype)].

The disadvantage of this separator is the presence of braking torque, which creates an obstacle to the movement of the material and leads to the mixing of a valuable component and host rocks.

The technical result of the invention is to increase the degree of extraction of a valuable component.

The technical result is achieved by the fact that in a magnetic separator containing two magnetic systems, it is new that the magnetic systems are made in the form of strips of rectangular prisms of non-ferrous iron-containing alloys that rotate around an axis passing through the side faces in opposite directions and simultaneously rotate in a horizontal plane for transfer on the non-magnetic plane of the extracted magnetic material with the possibility of changing the speed of each drive, as well as changing the distance from the separator on conveyors.

The magnetic moments of each of the magnets of the systems are directed in one direction.

A schematic view of the separator is shown in FIG. 1 (side view) and in FIG. 2 (top view).

The described separator contains two magnetic systems 1, 2, consisting of magnets 3 connected from the side faces of Nd-Fe-B 60 × 80 × 20 mm in size with magnetic moments directed in one direction. Magnets are placed inside a non-magnetic casing 4, provided at the ends with axles 5, mounted in bearings on the frame 6. The opposite rotation of the magnetic systems relative to each other and the simultaneous rotation relative to the plane of the conveyor belts is carried out from two autonomous drives: the drive of the frame 7 and the drive of the magnets 8 through the differential 9 A rotary non-magnetic screen 10 is attached to the device below to collect magnetic material 11 from the conveyor belts 12, 13. The removal of magnetic material is forced using Partitions 14 of a special design in the receiver 15.

The work of the separator is as follows. When moving conveyor belts 12, 13 in the direction of the arrow, particles of a valuable component 11 under the action of rotating alternating highly gradient magnetic fields rise from the stream and are pressed to the non-magnetic screen 10, which are transferred to the partition 14. The frame is made with the possibility of adjustment in height and angle of inclination for optimization separation parameters. Rotation in opposite directions allows you to turn the material in different directions under the influence of magnetic systems rotating in opposite directions. At the same time, the systems rotate in a plane parallel to the moving conveyors, with the possibility of relative adjustment, thereby creating rotating magnetic fields, leading to deflocculation and attraction of only particles of a valuable component to the non-magnetic screen. Non-magnetic mass continues to move on the conveyor and enters the tailings receiver (not shown).

The results of testing a prototype magnetic separator on magnetite ores of the Abakan deposit showed that the use of two rotating magnetic systems exposes the material to intense magnetic agitation, which improves the quality of finely divided magnetite concentrates by several percent.

Claims (1)

A magnetic separator containing two magnetic systems, characterized in that the magnetic systems are made in the form of strips of rectangular prisms of non-immobilized alloys that rotate around an axis passing through the side faces in opposite directions and simultaneously rotate in a horizontal plane to transfer the extracted magnetic material with the possibility of changing the speed of each drive, as well as changing the distance from the separator to the conveyors.

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