CN205236167U - Compound high gradient concentrator of strong magnetism of dielectric - Google Patents

Abstract

The utility model discloses a high-gradient ore concentrator with a dielectric strong magnetic compound field, which comprises a vertically installed swivel and matching driving parts. The swivel is supported by a swivel support plate and connected with the driving part for driving When the ring rotates, there are magnetic plates and coils on both sides of the rotating ring to form a strong magnetic field. There are also electrode plates on the inner side of the magnetic plate near the rotating ring. The electrode plates are connected to a high-voltage DC power supply to form a dielectric In the swivel field, a separate dielectric box is installed in the swivel. The dielectric rods in the dielectric box are distributed tangentially along the circumference of the swivel, parallel to the plane of the swivel. The material of the dielectric rods is pure iron, and a dielectric layer is arranged on it. The utility model makes comprehensive use of the magnetic and electrical differences between the useful minerals and gangue minerals for sorting, and solves the problem that when the useful minerals are similar to the dielectric constant of water and the magnetic difference between the useful minerals and the gangue minerals is small but the electrical difference is large, The traditional vertical ring strong magnetic separator cannot effectively separate the two, which significantly improves the beneficiation efficiency and beneficiation accuracy.

Description

A high-gradient ore concentrator in a dielectric strong magnetic composite field

technical field

The utility model belongs to a mineral processing machine, in particular to a high-gradient mineral processing machine with a dielectric strong magnetic compound field.

Background technique

For some weak magnetic minerals, because the difference between the specific magnetic susceptibility coefficients of useful minerals and gangue minerals is small, existing strong magnetic separators cannot effectively separate useful minerals from gangue minerals, and often separate useful minerals from gangue minerals. Minerals are mixed together, which will affect the beneficiation efficiency and beneficiation accuracy. For example, the patent application number is 201220618319.7, the application date is November 20, 2012, the publication number is 202893494U, and the name is a Chinese invention patent for an electromagnetic vertical ring high gradient magnetic separator. This patent document discloses a magnetic separator, Because the magnetic separator simply uses strong magnetism for separation, when the magnetic difference between useful minerals and gangue minerals is small, but the electrical difference is large, it cannot effectively separate the materials to be selected.

After summarizing the properties of these minerals, it is found that the useful minerals are mostly metal oxides or sulfides, and the gangue minerals that need to be separated are mostly silicate minerals. The biggest difference in properties between the two is the dielectric constant. The separation of two minerals is carried out by dielectric force in an electric field, and the force on electrically neutral particles in a non-uniform electric field is known: where r is the radius of the sphere, ε ₁ and ε ₂ are the absolute permittivity of the fluid medium and particles, respectively, is the gradient of the square of the electric field at the location of the particle. With water as the fluid medium, if the dielectric constant of the target mineral is close to that of water, the force on the target mineral is very small, and the mineral to be discarded is a silicate mineral, and its dielectric constant is usually the same as that of water. The difference is an order of magnitude, and the direction of the force is the opposite direction of the decrease of the electric field gradient. It is still impossible to sort by simply using dielectric sorting.

Utility model content

The technical problem solved by the utility model is: aiming at the problem of low beneficiation efficiency and ore beneficiation precision existing between useful minerals and ore minerals of the same nature (magnetic and electrical) in existing dielectric separation or strong magnetic separation, Provided is a high-gradient ore concentrator in a dielectric strong magnetic composite field that effectively combines magnetic field separation and electric field separation.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:

A high-gradient mineral concentrator with a dielectric strong magnetic composite field, including a vertically installed swivel 4 and supporting drive components, the swivel 4 is supported by a swivel support plate 10, and is connected with the drive component for driving the swivel The ring rotates, and the two sides of the swivel 4 are provided with a magnetically conductive plate 7 and a coil 1 for forming a strong magnetic field, and an electrode plate 2 is also provided inside the magnetically conductive plate 7 close to the swivel 4, and the electrode plate 2 Connected to a high voltage DC power supply for creating a dielectric field.

Further, the swivel 4 is composed of a number of discrete media boxes 4', in which there are evenly arranged a number of dielectric rods 11 distributed tangentially along the circumference of the swivel 4, and the dielectric rods 11 are connected with The plane where the swivel 4 is located is parallel.

Further, the main body of the dielectric rod 11 is made of a magnetically permeable medium 12 , and its outer surface is wrapped with a dielectric layer 13 .

Preferably, the material of the magnetically permeable medium 12 is pure iron.

Preferably, the dielectric layer 13 is a barium titanate dielectric layer.

In the present invention, the outer surfaces of the swivel support plate 10 and the swivel 4 are both made of insulating materials.

Further, the magnetic guide plate 7 and the electrode plate 2 are all arc-shaped plates arranged along the circumferential direction of the swivel ring 4, and the arc lengths all start from the ore feeding pipe 5 of the concentrator, and end at the top of the concentrate bucket 3, respectively. The formed strong magnetic field and the dielectric field cover the same range, and the direction of the magnetic field is consistent with the direction of the electric field.

Preferably, the magnetically conductive plate 7 and the electrode plate 2 are semicircular arc plates.

Preferably, the surface of the electrode plate 2 is coated with an insulating layer except the part used for wiring.

The utility model is based on the vertical ring strong magnetic separator, and two parallel arc-shaped electrode plates are arranged on the inner side of the magnetic guide plate close to the rotating ring, and a reliable insulating layer is coated on the surface, and a high-voltage direct current is passed through to generate an electric field. , using two magnetically permeable magnetic plates to guide the magnetic field generated by the coil between the two plates, forming a strong magnetic field between the plates, and controlling the direction of the current so that the magnetic poles on one side have the same name to achieve a magnetic field consistent with the direction of the electric field. At the same time, the dielectric rods in the dielectric box of the swivel are distributed along the tangential direction of the swivel circumference, parallel to the plane of the swivel, and pure iron is used as the dielectric rod, and a barium titanate dielectric layer is set on it to prevent excessive transfer of electrons affect the electric field distribution.

The utility model can use the magnetic difference and electrical difference between useful minerals and gangue minerals for sorting. When the magnetic difference between useful minerals and gangue minerals is small but the electrical difference is large, a combination of strong magnetic field and strong electric field is used. With water as the fluid medium, the magnetic force of the useful minerals points to the magnetic separation medium, and the dielectric force is very small and can be ignored. The dielectric force is far away from the magnetic separation medium, and the two forces cancel each other out. The probability of this part of minerals being selected is greatly reduced, so the efficiency and precision of mineral processing can be improved.

To sum up, the dielectric strong magnetic compound field high gradient concentrator of the present utility model is based on the vertical ring strong magnetic separator, adding a strong electric field to the strong magnetic field, and rationally arranging the medium so that it can effectively change the electric field and magnetic field It can efficiently select weak magnetic minerals with large electrical difference between useful minerals and gangue minerals, improve the utilization rate of mine resources, and meet the enrichment requirements of production enterprises for weak magnetic minerals.

Description of drawings

Fig. 1 is the front view of the dielectric strong magnetic composite field high gradient concentrator of the present utility model.

Fig. 2 is a left view of the high-gradient mineral concentrator of the utility model with a dielectric strong magnetic field.

Fig. 3 is the plan view of the high-gradient ore concentrator of the dielectric strong magnetic compound field of the present utility model

Fig. 4 is a schematic cross-sectional view of the media box in the present invention.

Fig. 5 is a sectional view of a dielectric rod.

Labels in the figure: 1. Coil, 2. Electrode plate, 3. Concentrate hopper, 4. Swivel, 4'. Medium box, 5. Feed pipe, 6. Tailings pipe, 7. Magnetic plate, 8. Reducer, 9. Motor, 10. Swivel support plate, 11. Dielectric rod, 12. Magnetic medium, 13. Dielectric layer

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Referring to Fig. 1 to Fig. 5, the high-gradient ore concentrator in the diagram includes a coil 1, an electrode plate 2, a concentrate bucket 3, a swivel 4, an ore feeding pipe 5, a tailings pipe 6, a magnetic conduction Plate 7, reducer 8, motor 9, swivel support plate 10 and other components, wherein the swivel 4 is supported by the swivel support plate 10, connected with the matching reducer 8 and motor 9, used to drive the swivel to rotate, and the swivel Both sides of 4 are provided with magnetically conductive plates 7 and coils 1 for forming a strong magnetic field. An electrode plate 2 is also provided inside the magnetically conductive plate 7 close to the swivel 4, and the electrode plate 2 is connected to a high-voltage DC power supply for forming a magnetic field. Dielectric field, the surface of the electrode plate 2 is coated with an insulating layer except for the part used for wiring. production. Among them, the magnetic guide plate 7 and the electrode plate 2 are all semicircular arc plates arranged along the circumferential direction of the swivel ring 4, and the arc lengths all start from the ore feeding pipe 5 of the concentrator, and end at the top of the concentrate bucket 3. Symmetrical to the center of the swivel, the strong magnetic field formed by the magnetic plate 7 and the dielectric field formed by the electrode plate 2 have the same coverage. 7 to generate a strong magnetic field, and control the direction of the magnetic field between the magnetic plates 7 by controlling the direction of the coil current. The direction controls the direction of the electric field between the electrode plates 2, and it should be ensured that the direction of the magnetic field is consistent with the direction of the electric field.

Referring to Fig. 4 and Fig. 5 together, the swivel 4 is composed of a number of discrete media boxes 4', and a number of dielectric rods 11 distributed tangentially along the circumference of the swivel 4 are evenly arranged in the media case 4'. The plane where the ring 4 is located is parallel, the main body of the dielectric rod 11 is made of a magnetically conductive medium 12 , and a dielectric layer 13 is wrapped on its outer surface.

When using the dielectric strong magnetic compound field high gradient concentrator of the utility model for sorting, the raw ore pulp enters through the ore feeding pipe 5, and the magnetic field is generated after the excitation coil 1 is energized, and is introduced between two magnetic guide plates 7. After the electrode plate 2 is energized, an electric field is generated between the two plates, and the swivel ring 4 rotates in the magnetic field and the electric field. The medium is magnetized, and the magnetized magnetic separation medium has an attraction force on the magnetic minerals in the pulp, and at the same time, the electric field has a repulsion force on the gangue minerals with a small dielectric constant. Therefore, the useful magnetic minerals are adsorbed on the magnetic separation medium box, while The gangue minerals whose magnetic susceptibility coefficient is similar to useful minerals cannot be adsorbed. When the magnetic separation medium box 4' rotates with the swivel ring 4 and turns out of the magnetic field, the magnetic separation medium in the magnetic separation medium box 4' loses its magnetism, and the magnetic minerals that are adsorbed It falls naturally or is washed down by flushing water to be collected and discharged into the concentrate hopper 3, and the tailings enter the tailings box and are collected separately through the tailings pipe 6. In this way, weak magnetic minerals that could not be sorted by conventional vertical ring strong magnetic separators or whose sorting efficiency was not high can be effectively sorted by using the dielectric strong magnetic composite field high gradient mineral separator of the present invention, which improves the mineral processing efficiency. efficiency.

The implementation of the strong magnetic working mode and the composite field working mode with the addition of a dielectric field in this embodiment will be described in detail below.

(1) Strong magnetic realization method:

As shown in Fig. 1, Fig. 2 and Fig. 3, the strong magnetic separation part is mainly composed of the swivel 4, the coil 1 and the supporting driving parts, as well as the corresponding ore receiving and ore filling devices of the concentrator. The realization of the magnetic field uses parallel magnetic plates 7, and the magnetic field generated by the coil 1 is directed between the two magnetic plates to form a strong magnetic field between the plates. The excitation uses both ends of the excitation, and the direction of the current is controlled so that the magnetic poles on one side have the same name. The coil is in the The outside is covered with an iron plate for magnetic conduction to reduce magnetic resistance. The magnetic guide plate 7 starts at the ore feeding position and ends at the ore unloading position. Magnetic minerals enter from the ore feeding pipe 5 and are transferred by magnetic force between the magnetic guide plates 7 The ring is adsorbed and lifted, and after reaching the ore unloading position, it is unloaded into the concentrate hopper 3 due to the weakening of the magnetic field. The non-magnetic minerals directly flow away from the tailings pipe 6 through the medium gap. The entire separation process is carried out in water, and the water acts as a load. The mineral carrier has a good dispersion effect on the mineral particles, and has no effect on the magnetic field distribution. Between the useful minerals and gangue minerals with large difference in specific magnetic susceptibility, only the strong magnetic working mode can be used for separation.

(2) Dielectric field adding method:

As shown in Figure 1, Figure 2, and Figure 3, two parallel arc-shaped electrode plates 2 are arranged on the inner side of the magnetically conductive plate 7 close to the swivel 4, and after the surface of the electrode plate 2 is coated with a reliable insulating layer, Apply a high-voltage direct current to the end, so that the dielectric box 4' of the swivel is in a uniform strong electric field. It will be polarized in the electric field, changing the original electric field distribution, forming a high electric field gradient on the surface of the dielectric rod, which can generate dielectric force on the mineral particles, and useful minerals and gangue minerals with small difference in specific magnetic susceptibility coefficient When sorting, a dielectric field can be added according to the difference in dielectric constant for strong magnetic and dielectric composite sorting, and the gangue minerals with magnetic properties equivalent to useful minerals will be repelled by dielectric force to increase the beneficiation efficiency and beneficiation precision.

In order to prevent the swivel 4 from affecting the electric field, the swivel 4 and the swivel support plate 10 can be made of insulating materials except for the medium.

As shown in Figure 4 and Figure 5 for the arrangement of the media box, the swivel 4 is composed of a number of discrete media boxes. Parallel, the dielectric rod 11 not only has the purpose of changing the magnetic field distribution but also the electric field distribution, but the direction of the increase of the magnetic field gradient and the direction of the electric field gradient both point to the dielectric rod 11, which is determined by the dielectric rod 11. determined by the shape. The body magnetic medium 12 of the dielectric rod 11 is preferably pure iron, and at the same time pure iron is also a conductive medium. The purpose of setting a barium titanate dielectric layer on the outer surface of the magnetic medium 12 is to prevent the excessive transfer of electrons from affecting the electric field distribution. .

The technical effects of the present utility model are described below by providing specific mineral processing examples.

Example 1:

The dielectric constant of certain metal oxide minerals is 80, while the dielectric constant of water as a dielectric separation medium is 81, and the dielectric constant of gangue silicate minerals is 6-11. The specific magnetic susceptibility coefficients of metal oxides in this material are 181 for the target mineral, 5.01 for one gangue, 37.88 for one gangue, and 135.68 for another gangue. The machine uses strong magnetic to select and throw away two minerals with gangue specific susceptibility coefficients of 5.01 and 37.88, while the magnetic force on the mineral with specific magnetic susceptibility coefficient of 135.68 points to the magnetic separation medium, and its dielectric force is far away from the magnetic separation medium. The two forces cancel each other out, making it less likely to enter the product, thus improving the beneficiation efficiency.

Example 2:

The dielectric constant of a certain metal oxide mineral is 75.7, while the dielectric constant of water as a dielectric separation medium is 81, and the dielectric constant of gangue silicate minerals is 5-24. The specific magnetic susceptibility coefficients of the metal oxides in this material are 286.70 for the target mineral, 18.61 for one gangue, and 224.56 for another gangue. Using this new type of dielectric strong magnetic composite field high gradient separator, the strong magnetic Throw away the minerals with a specific magnetic susceptibility coefficient of 18.61, while the magnetic force on the minerals with a specific magnetic susceptibility coefficient of 224.56 points to the magnetic separation medium, and the dielectric force it receives is far away from the magnetic separation medium. These two forces cancel each other out, making it finally enter in tailings products.

Example 3:

The dielectric constant of a certain metal oxide mineral is 85, and the gangue is a silicate mineral. Water is also used as the dielectric separation medium. The specific magnetic susceptibility coefficients of the metal oxide in this material are 286.70 for the target mineral, Stone 15.79, one kind of gangue 70.36, and another kind of gangue 171.75, use this new type of dielectric strong magnetic composite field high gradient separator, and use strong magnetic to select and throw away two gangues with specific magnetic susceptibility coefficients of 15.79 and 70.36 The magnetic force of the mineral with a specific susceptibility coefficient of 171.75 points to the magnetic separation medium, and its dielectric force is far away from the magnetic separation medium. These two forces cancel each other out, making the probability of entering the product smaller.

The above is a preferred embodiment of the present utility model, but those skilled in the art should understand that, without departing from the spirit and scope of the present utility model defined by the appended claims, all modifications made to the utility model in terms of form and details All these changes belong to the protection scope of the present utility model.

Claims (9)

1. A kind of high-gradient ore concentrator of dielectric strong magnetic composite field, comprises the swivel (4) of vertical installation and supporting driving part, and described swivel (4) is supported by swivel support plate (10), and with The driving parts are connected to drive the swivel to rotate, and the two sides of the swivel (4) are provided with magnetic plates (7) and coils (1) for forming a strong magnetic field, and it is characterized in that: near the swivel ( 4) An electrode plate (2) is also provided inside the magnetically conductive plate (7), and the electrode plate (2) is connected to a high-voltage DC power supply for forming a dielectric field. 2. A kind of high-gradient ore concentrator of dielectric strong magnetic composite field according to claim 1, said swivel (4) is made up of several discrete media boxes (4'), and said media box (4') Several dielectric rods (11) distributed tangentially along the circumference of the swivel (4) are evenly arranged, and the dielectric rods (11) are all parallel to the plane where the swivel (4) is located. 3. According to claim 2, a high-gradient ore concentrator with a dielectric strong magnetic composite field, the main body of the dielectric rod (11) is made of a magnetically conductive medium (12), and its outer surface is wrapped with a dielectric layer (13) . 4. A kind of high-gradient ore concentrator with dielectric strong magnetic composite field according to claim 3, the material of the magnetic conduction medium (12) is pure iron. 5. A dielectric strong magnetic composite field high-gradient mineral concentrator according to claim 4, wherein the dielectric layer (13) is a barium titanate dielectric layer. 6. According to any one of claims 1-5, a dielectric strong magnetic composite field high-gradient concentrator, the outer surfaces of the swivel support plate (10) and the swivel (4) are made of insulating materials become. 7. According to claim 1, a kind of high-gradient mineral concentrator with dielectric strong magnetic composite field, said magnetically conductive plate (7) and electrode plate (2) are all arc-shaped plates arranged along the circumferential direction of swivel (4) , the arc length starts from the ore feeding pipe (5) of the concentrator and ends above the concentrate hopper (3). The strong magnetic field and the dielectric field formed respectively cover the same range, and the direction of the magnetic field is consistent with the direction of the electric field. 8. According to claim 7, a high-gradient mineral concentrator with a dielectric strong magnetic compound field, the magnetically conductive plate (7) and the electrode plate (2) are both semicircular arc-shaped plates. 9. According to claim 1, a high-gradient ore concentrator with a dielectric strong magnetic compound field, the surface of the electrode plate (2) is coated with an insulating layer except for the part used for wiring.