RU2380164C1 - Drum magnetic separator - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: magnetic separator comprises non-magnetic rotary drum and magnetic system arranged inside drum, which generates alternating magnetic fields, feeder and receivers of separation products. Magnetic system is arranged of permanent magnets in the form of rectangular prisms combined by alternating sections in two rows along with drum travel. At some sections magnets are installed on base with differently directed magnetic moments. At other sections magnets are installed on rib with magnetic moments directed towards each other with the possibility to vary opposite angle of magnets inclination, which provide for pushing of magnetic power lines due to horizontal stress effect and as a result, shaking and ripping of material in process of its motion.

EFFECT: improved quality of fine unclassified ore separation process quality.

2 dwg

Description

The invention relates to the field of mineral processing.

Known separators have various magnetic systems with alternating poles in the direction of movement of the material, consisting, as a rule, of permanent magnets or electromagnets [L.A. Lomovtsev, N.A. Nesterova, L.A. Drobchenko. Magnetic beneficiation of strong magnetic ores. M .: Nedra, 1979].

Design features of the device of magnetic systems depend on the properties of the processed materials [V.V. Karmazin, V.I. Karmazin. Magnetic and electrical enrichment methods. M .: Nedra, 1988].

The disadvantage of these devices is the low selectivity of separation of unclassified ores with a particle size of 0 to 10 mm by magnetic separation, since the influence of the centrifugal component of the separation process is limited. Electromagnetic separators also require power consumption.

Closest to the technical solution to the proposed one is a magnetic separator with an adjustable magnetic system, including a mechanism for changing the position of the blocks relative to the axis of the non-magnetic drum [a.s. No. 1153987, class B03C 1/10, publ. 05/07/85, bull. No. 17, (prototype)].

The disadvantages of this separator: complex kinematics when changing the position of the rows relative to the surface of the drum; low induction - 0.04-0.12 T, large interpolar distances between the blocks, which should be within half the width of the magnets using traditional separation methods, and hence increased losses of magnetic material during separation due to field dips.

The technical result of the proposed device with rotating, attracting and pushing magnetic fields along the movement of the material is to improve the quality of the process of separation of small unclassified ore.

The indicated technical result is achieved in that in a magnetic separator including a non-magnetic rotating drum and a magnetic system located inside the drum, a feeder and receivers of separation products, it is new that the magnetic system is made of permanent magnets in the form of rectangular prisms, united by alternating sections of two a row along the drum and consisting in some sections of magnets mounted on a base with multidirectional magnetic moments, and in other sections of the magnets updated to the edge with magnetic moments directed towards each other with the possibility of changing the opposite angle of inclination of the magnets.

The presence of buoyant magnetic force during alternation with attractive and the simultaneous presence of rotational magnetic moments during alternation of poles allows you to rotate and shake the material with magnetic forces, thus freeing out gangue particles from the flocs and thereby contributing to their removal into dump tails. The quality of the products obtained is regulated by the centrifugal component of the separation process and the slide gate.

A schematic view of the separator is shown in figure 1. Figure 2 is a view of a magnetic system without a shell (AA).

The magnetic separator is equipped with a rotating drum (1), inside of which there is a magnetic system mounted on a yoke (2) and consisting of a magnetic circuit (3), permanent magnets in the form of rectangular parallelepipeds (4), mounted on a base of two with alternating magnetic polarity, and parallelepipeds (5) mounted on an edge with an angle of 5 ° -15 ° relative to each other. Feeder (6), gate (7), product receivers (8, 9) allow the process to be conducted in a continuous mode. The magnetic core for magnets, item 4, consists of steel strips with beads 5 mm high, mounted on a yoke (2); for magnets, item 4, special containers are installed with the ability to adjust the angle between the magnets to change the magnitude and depth of the buoyancy force. The magnetic circuit design provides the required clearances in both axial and radial directions.

The work of the separator is as follows. The source material through the feeder 6 enters the surface of the non-magnetic drum 1 and when it is rotated is transported to the magnetic field of the optimized magnetic system. The design of the magnetic circuit is configured to change the angle between the magnets mounted on the rib.

Using various layout options for non-ferrous-iron-containing magnetic blocks, the necessary and sufficient process components are achieved to enrich magnetite ore under various separation conditions.

The material begins to rotate under the action of the magnetic force of magnets with alternating magnetic polarity, and when the magnets with counter magnetic fields get into the zone of the buoyant magnetic force, the material is shaken, pressed against the surface of the drum. The process of magnetic agitation and magnetic shaking due to the alternation of twisting and pushing magnetic moments provides high-quality products, improves the separation efficiency of unclassified material.

The magnetic product attracted to the surface of the non-magnetic drum 1, when it is rotated, is transferred to the receiver 9, and the non-magnetic product under the action of centrifugal force and gravity enters the receiver 8. The presence of the gate allows the separator to be adjusted to obtain products of the required quality.

Claims (1)

A magnetic drum separator including a non-magnetic rotating drum and a magnetic system located inside the drum, a feeder and separation products receivers, characterized in that the magnetic system is made of permanent magnets in the form of rectangular prisms, united by alternating sections in two rows along the drum and consisting of in some areas of magnets mounted on a base with multidirectional magnetic moments, and in other areas of magnets mounted on an edge with magnetic moments, for example detecting toward each other to vary the counter-magnets angle of inclination.

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