Magnetic separator with rotary magnetic system

FIELD: process engineering.

SUBSTANCE: invention relates to enrichment of minerals with the help of magnetic separation. Proposed magnetic separator comprises magnetic system made up of permanent magnets that can revolve at controlled frequency, and separation chamber. The latter is arranged below magnetic system whereto separated product comes via one of several channels arranged at different distances sideways of said magnetic system. Magnetic product is discharged by water flow directed normally from separation chamber inner surface.

EFFECT: higher selectivity of separation.

1 dwg

 

The invention relates to the field of mineral processing method for magnetic separation of slurries with the possibility of selective separation ratio of the magnetic and non-magnetic component in the concentrate and tails.

There are various types of magnetic separators, designed for enrichment of magnetite ores. A common shortcoming of these devices is not sufficiently high efficiency of magnetic separation, magnetic and non-magnetic minerals and their intergrowths with the high cost of separators.

The closest technical solution to offer is a universal magnetic separator with a rotating magnetic system [1] (prototype).

The drawback to this unit is the lack of implementation of the process peredishki when moving magnetic product on the surface of the separation chamber and low productivity.

The technical result of the proposed magnetic separator with a rotating magnetic system is the combination of effective destruction of magnetic conglomerates and floc with high selectivity magnetic separation of slurries, low intensity and cost of the apparatus, the improved performance.

This technical result is achieved by the fact that universal magnetic separator comprising a magnetic is the system, made of permanent magnets, with the possibility of rotation with adjustable frequency, and the separation chamber, it is new that the separation chamber is located under the magnetic system, the separated product is fed through one of several channels that are located at different distances from the side of the magnetic system, and the output of the magnetic product is carried out by the jet of water directed normally from the inner surface of the separation chamber.

The drawing shows a schematic view of the separator with a rotating magnetic system.

The described apparatus includes a rotating variable speed non-magnetic cylinder 1 within which is located a magnetic system 2 consisting of the United end faces of the permanent magnets in the form of rectangular parallelepipeds. The magnetic moments of all magnets have the same direction. The separation chamber 3 is made of nonmagnetic stainless steel sheet and covers the magnetic system from the bottom. The inner surface of wall 4 located near the magnetic system, is covered with rubber. Feeding the separated product is made through one of the three (a, b, C) channel 5. In the discharge zone is a conduit 6, provided with a chamber 7 with a narrow slot 8, which is designed to distribute the flow of water along the entire length of the separation chamber, eff the active branch of the magnetic concentrate from the surface of the separation chamber and output channel discharge 9, as well as creating water flow 10 toward the movement of the magnetic fraction to prevent the ingress of finely dispersed non-magnetic impurities in the concentrate. Non-magnetic products are excreted through the channel 11.

Does magnetic separator as follows.

The separated product in the form of pulp, depending on the task separation, served in one of the channels 5. When the flow in the channel "a", located near the magnetic system, under the action of a rotating magnetic field, the particles having a magnetic moment, moving in the direction of the magnetic system, intensively revolving around their own centers of gravity, freed from adhering non-magnetic, weakly magnetic and not fully disclosed particles of minerals. After contact with the inner surface of the separation chamber 4 under the action of the rotational torque generated by the rotating magnetic system, the rolling motion of the magnetic particles to the discharge zone. When this occurs additional purification from non-magnetic impurities.

When downloading through the channels "b" and "C" at the expense of increasing distance from the magnetic system is reduction in the magnetic force directed in the direction of the magnetic system, which leads to a loss in the tails of the magnetic grains containing impurities non-magnetic products. Upon further advancement of magneticaly they fall into the discharge zone, where under the action of jets of water directed along the radius-vector, detached from the surface of the separation chamber and is displayed through the channel 9.

When loading the separated product through the channel, under the action of magnetic fields of low intensity on the separation surface of the camera 4 are shown in concentrate mainly mineral particles, and not fully disclosed particles containing a non-magnetic impurities are removed through the channel box 11. The first version of the separation (channel "a") is used to maximize the useful life of the product, and the second and third channels "b" and "C") for concentrate and tailings from the first stage of separation or high-quality concentrate and middlings to re-cosmelenia in the second stage of separation.

The use of different channels of load 5 allows to obtain a different ratio of the useful product in concentrate and middlings.

The inventive magnetic separator with a rotating magnetic system differs from other similar devices and from the prototype that allows for the separation of mineral mixtures with high selectivity and ability to obtain concentrates with adjustable degree of extraction of the separated product. The apparatus is structurally simple and has low cost of manufacture ekspluatacii.

The source of information

1. Patent RU 2255812 BEEP No. 19, 10.07.2005.

Magnetic separator with a rotating magnet system for magnetic processing and separation of mineral mixtures, comprising a magnetic system, made of permanent magnets, with the possibility of rotation with adjustable frequency, and the separation chamber, wherein the separation chamber is located under the magnetic system, the separated product is fed through one of several channels that are located at different distances from the side of the magnetic system, and the output of the magnetic product is carried out by the jet of water directed normally from the inner surface of the separation chamber.



 

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