CN103240177A - Separating ring of high-gradient magnetic separator - Google Patents

Abstract

A sorting ring for a high-gradient magnetic separator, comprising a ring body mounted on a turntable of the magnetic separator and capable of rotating synchronously with the turntable, and at least two layers arranged around the ring body for accommodating and fixing media boxes The arc grooves, medium boxes, ore unloaders installed on the outer periphery of each arc groove, ore receiving devices installed on the inner periphery of each arc groove, and ore feeders installed in the ring body. Because the present invention adopts the structure with at least two layers of media boxes on the ring body, the thickness of each layer of media boxes can be greatly reduced, and because the number of layers of media boxes increases, a larger size can be installed in the sorting ring. The capacity medium, on the basis of ensuring that it has sufficient magnetic field strength, can effectively increase the sorting space, thereby greatly improving the processing capacity of the magnetic separator, especially when the magnetic separator equipment needs to be enlarged, this kind of sorting ring structure It can effectively ensure that it can install more media conveniently and reliably, fully guarantee its sorting effect, and has simple and reliable structure, low cost and high efficiency.

Description

A sorting ring of a high gradient magnetic separator

technical field

The invention belongs to the technical field of machinery, and in particular relates to a sorting ring of a high-gradient magnetic separator of an ore concentrator.

Background technique

The high-gradient magnetic separation theory has brought a qualitative leap to the field of magnetic separation, increasing the types of minerals that can be magnetically separated, and widening the upper and lower limits of particle size.

Early high-gradient magnetic separators are periodic, also known as magnetic filters, and this type of equipment is widely used in occasions with extremely low magnetic content and very fine particle size.

The continuous high gradient magnetic separators that appeared immediately include electromagnetic flat ring strong magnetic high gradient magnetic separators, permanent magnet and electromagnetic double vertical ring high gradient magnetic separators. Electromagnetic flat-ring high-gradient magnetic separator is easy to cause mechanical blockage because the ore feeding and cleaning water directions are the same. Permanent magnetic vertical ring high-gradient magnetic separator is very easy to form strong magnetic minerals, especially iron filings, at the ore feeding port. Magnetic blockage occurs due to accumulation. Electromagnetic vertical ring high-gradient magnetic separation is not easy to cause mechanical blockage due to the opposite flow direction of the ore and concentrate flushing water in the medium stack, and because it is electromagnetic, when the excitation current does not exist , Strong magnetic minerals and iron filings are easy to fall off at the feed port, and magnetic blockage will not occur.

In order to reduce the inclusion of non-magnetic substances in the magnetic products, vibration and pulsating high-gradient magnetic separators have appeared, such as a pulsating high-gradient magnetic separator disclosed in Chinese patent 86106144.6, which can make the enrichment ratio of recycled materials have a certain Increased, while reducing mechanical clogging due to the pulsating action of the water. However, the core working principle of this type of equipment is based on the fact that the pulsation direction of the pulp or water is consistent with the direction of the magnetic force line, when the pulsation direction of the pulp or water is consistent with the direction of the magnetic force line. The particle groups adsorbed on the surface of the medium only exist on one side along the direction of the magnetic force line. At this time, the fluid force generated by the reciprocating motion of the ore slurry presses or pulls the particle group in front. Because there is a medium in front or behind the particle group, the liquid inside The buffering effect slows down the fluid force, which is not conducive to the evacuation of the particle group, and the non-magnetic substances and weakly magnetic joints in the particle group cannot be effectively washed out. Therefore, the sorting effect is also relatively limited, and the enrichment ratio and metal recovery rate cannot be taken into account. Only concentrates and tailings are produced. Only one of the concentrate grade and metal recovery rate can be guaranteed. If both are guaranteed, it must be increased. One stage of operation increases investment and operating costs, that is, when high-grade concentrates are obtained, the metal loss in the tailings is relatively large; on the contrary, when the tailings grades are effectively controlled, the quality of the concentrates is difficult to guarantee. In addition, the media of this magnetic separator is arranged in a cross, so the media is easy to clog, and once clogged, it is often difficult to clean.

Chinese patent 02134298.9 discloses a dual-frequency pulse double vertical ring high-gradient magnetic separator, including a separation ring and a magnetic system, which is characterized by a magnetic system capable of horizontal magnetic force lines in the separation space and capable of producing ore pulp in phase with the magnetic force lines. The vertical reciprocating movement is equipped with an organic combination of dual-frequency pulse devices that can produce tailings and middle ore through two groups of dual-frequency pulse devices that use different reciprocating impact ore flow frequencies under the sorting ring. Due to the combination of the separation space of the horizontal magnetic field lines formed by the left and right magnetic poles and the magnetically conductive part of the outer edge of the turntable and the unique dual-frequency pulse device, this patent can be used in magnetic separation according to the hydrodynamic force generated by the pulp pulse and the magnetic force generated by the magnetic field. Different sections of the machine sorting space have different forces on mineral particle groups with different magnetic properties, especially when the direction of the magnetic force line is horizontal and perpendicular to the reciprocating direction of the pulp generated by the pulse. The particles adsorbed on the surface of the medium only exist on one side along the direction of the magnetic force line. At this time, the direction of the fluid force generated by the reciprocating motion of the pulp is tangent to the side where the particles on the surface of the medium gather, and the pulp passes through the inside of the particle group. It is sheared and cleaned, and the non-magnetic substances and weakly magnetic conjoined particles mixed in the particle group are washed out, thereby greatly improving the sorting effect. The media of this magnetic separator is arranged in a matrix, so the media is not easy to clog, and it is easy to clean once clogging occurs. However, the sorting space of this magnetic separator is not large enough, which is mainly limited by the pole pitch of the magnetic field and the thickness of the medium. Because the pole distance is too large, the background field strength of the separation space will be reduced, or it can be solved by increasing the ampere-turns of the coil, but this requires a large increase in power consumption, and increasing the thickness of the medium will make it difficult to unload the concentrate. If the sorting space is not large, it is impossible to load a larger volume of media, which affects the processing capacity of the equipment. Especially when the equipment needs to be enlarged, the contradiction between the increase of the thickness and volume of the media and the clogging phenomenon becomes more prominent.

Contents of the invention

The object of the present invention is to address the above existing problems and deficiencies, to provide a sorting ring for high-gradient magnetic separators with reliable structure, which can greatly increase the processing capacity of magnetic separators, and especially can adapt to large-scale magnetic separation equipment.

Technical scheme of the present invention is realized like this:

The separation ring of the high gradient magnetic separator according to the present invention is characterized in that it comprises a ring body which is installed on the turntable of the magnetic separator and can rotate synchronously with the turntable and at least two layers which are arranged around the ring body for The arc slots for accommodating and fixing the media box, the media box, the ore unloading device installed on the outer periphery of each arc slot, the ore receiving device respectively installed on the inner periphery of each arc slot, and the ore feeding device installed in the ring body.

Wherein, the above-mentioned medium boxes are welded by magnetically conductive stainless steel rods according to certain rules, and a partition is arranged between two adjacent medium boxes.

The above-mentioned ring body is composed of a thick-walled ring and a thin-walled ring, and the thick-walled ring and the thin-walled ring are respectively placed on the turntable through a bearing sleeve.

The present invention adopts the structure with at least two layers of media boxes on the ring body, so that the thickness of the media boxes of each layer can be greatly reduced, and because the number of layers of media boxes increases, a larger size can be installed in the sorting ring. The capacity medium, on the basis of ensuring that it has sufficient magnetic field strength, can effectively increase the separation space, thereby greatly improving the processing capacity of the magnetic separator, especially when the magnetic separator equipment needs to be enlarged, this sorting ring structure It can effectively ensure that it can install more media conveniently and reliably, fully guarantee its sorting effect, and has simple and reliable structure, low cost and high efficiency.

The present invention will be further described below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the front view of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of the present invention along the direction A-A in Fig. 1 .

Fig. 3 is a schematic cross-sectional structure diagram of the present invention along the B-B direction in Fig. 1 .

Fig. 4 is a structural schematic view of the present invention installed on a magnetic separator.

Fig. 5 is a schematic perspective view of the three-dimensional structure of the media box of the present invention.

Fig. 6 is a schematic diagram of the three-dimensional structure of the ring body of the present invention.

Detailed ways

As shown in Fig. 1-Fig. 6, the sorting ring of the high gradient magnetic separator of the present invention comprises the ring body 9 that is installed on the turntable 8 of the magnetic separator and can rotate synchronously with the turntable and is installed on the ring. At least two layers around the body 9 are used to accommodate and fix the arc groove 10 of the medium box 3, the medium box 3, the ore unloading device 1 installed on the outer periphery of each arc groove 10, and the contact connector installed on the inner periphery of each arc groove 10 respectively. Miner 2, the ore feeder 5 that is installed in the ring body 9. Wherein, the above-mentioned medium boxes 3 are welded by magnetically conductive stainless steel rods (medium) according to certain rules, and a partition 4 is arranged between two adjacent medium boxes 3 . The medium can gather magnetic force lines in the magnetic field, so a magnetic field with a high gradient can be formed around its surface, and the magnetic field force is proportional to the product of the magnetic field intensity and the magnetic field gradient. In the magnetic field, a high magnetic field force can be formed around the surface of the medium, which can recover weakly magnetic mineral particles. The greater the surface curvature of the medium, the higher the surrounding magnetic field gradient, and the better the recovery effect of fine-grained weakly magnetic minerals. The above-mentioned ring body 9 is composed of a thick-walled ring 7 and a thin-walled ring 6 connected, and the thick-walled ring 7 and the thin-walled ring 6 are respectively installed on the turntable 8 through bearing sleeves 11 .

The sorting process is realized in this way. When the excitation coil is fed with a large current of direct current, a high-strength magnetic field is formed in the sorting space, and a high magnetic field force can be formed around the surface of the medium in the magnetic field. The sorting ring is driven by a motor, a pair of gear pairs and a rotating disc to rotate counterclockwise, and its lower part passes through the arc-shaped sorting space formed by the left magnetic pole and the right magnetic pole, and each arc groove on the sorting ring contains a medium box.

When the ore pulp enters the sorting space evenly and slowly from the feeding hopper, due to the action of the magnetic field, the magnetic mineral particles are attracted to the surface of the medium, and the fluid dynamics of up and down movement are generated under the action of the pulse mechanism, and the non-magnetic particle group is not affected. They are washed out with the pulp and cannot be absorbed by the magnetic medium and enter the tailings hopper through the medium pile; while the magnetic particles adsorbed on the surface of the medium rotate with the sorting ring, gradually break away from the magnetic field, and enter the magnetic product unloading area. Under the action of the concentrate flushing water, it falls off the surface of the medium and enters the concentrate bucket, which is a magnetic product. This separates the magnetic and non-magnetic particle populations.

The present invention is described by the embodiment, but does not constitute limitation to the present invention, with reference to the description of the present invention, other changes of the disclosed embodiment, if it is easy to imagine for those skilled in the art, such changes should belong to Within the scope defined by the claims of the present invention.

Claims (3)

1. the separation ring of a high gradient magnetic separator is characterized in that comprising ring body (9) on the rotating disk (8) that is installed on magnetic separator and that can rotate synchronously with rotating disk and is arranged at least two layers of this ring body (9) periphery being used for the arc grooves (10), cartridge (3) of ccontaining and mounting medium box (3), being installed on unloading ore deposit device (1), being installed on connecing ore deposit device (2), being installed on the ore feeder (5) of ring body (9) of week in each arc groove (10) respectively of each arc groove (10) periphery respectively.

2. according to the separation ring of the described high gradient magnetic separator of claim 1, it is characterized in that above-mentioned cartridge (3) is to be welded according to certain rules by the magnetic stainless steel rod, and be provided with dividing plate (4) between adjacent two cartridges (3).

3. according to the separation ring of the described high gradient magnetic separator of claim 1, it is characterized in that above-mentioned ring body (9) is connected to form by heavy wall ring (7) and thin-walled ring (6), and heavy wall ring (7) and thin-walled ring (6) are installed on the rotating disk (8) by bearing holder (housing, cover) (11) respectively.

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