CN107855213A - Divide in a kind of continuity double to pole formula magnetic system permanent-magnet high gradient high intensity magnetic separation device - Google Patents

Abstract

A continuous center-split double-opposite magnetic system permanent magnet high-gradient strong magnetic separation device. The device takes the rotating shaft as the center and adopts the same magnetic system yoke to be symmetrically arranged to form a symmetrical anti-polar structure of the whole machine. The magnetic poles are formed with the radial central plane of the magnetism-gathering medium cylinder as a symmetric plane to form left and right middle split symmetrical pole-type structures; the magnetism-gathering medium cylinder adopts the structural form of a polygonal magnetism-gathering medium cylinder, The two sides of the vertical line of the cylinder are arranged symmetrically along the length direction to divide the cavity of the magnetic accumulation medium cylinder into four areas with equal areas. The areas located at both ends of the magnetic accumulation medium cylinder are symmetrically installed with magnetic accumulation media, while The adjacent areas on both sides of the mid-perpendicular line are non-magnetic accumulation medium areas; the magnetic poles use square permanent magnets, up, down, left, right, and five-sided square extruded soft iron materials as magnetic poles, and use square soft iron materials as magnetic poles to guide the magnetic force lines; and The square soft iron magnetic poles extruded on five sides are symmetrically arranged to form an opposite pole structure.

Description

A continuous mid-divided double-pole magnetic system permanent magnet high-gradient strong magnetic separation device

technical field

The invention relates to a permanent-magnet high-gradient magnetic separation device for weak magnetic powder. This magnetic separation device is especially suitable for dry separation of coarse coal powder, and can be widely used in energy, electric power, metallurgy, and non-metallic mineral purification and removal. miscellaneous fields.

Background technique

The magnetic separation device with opposite pole magnetic system structure is a closed magnetic circuit structure often used in today's permanent magnet strong magnetic separators. V. Zejurka and others from the Czech Republic abroad made a pair of multiple small permanent magnets in the Czech Republic. The magnetic field characteristics of the polar magnetic system structure have been measured systematically and the glaze material has been experimentally studied. The research results show that the closed structure of the opposite pole magnetic system designed with NdFeB permanent magnet materials can further improve the separation efficiency. The magnetic induction intensity of the air gap in the space increases the sorting space. Specifically, two permanent magnets with opposite poles and an iron yoke form a magnet structure with a large cavity, and a sorting box with the same shape as the cavity surrounded by the magnetic system is arranged in it, and the magnetic gathering medium is installed in the sorting box. A single magnetic pole is a large magnetic block composed of multiple small NdFeB magnetic blocks. Each magnetic block is put into a stainless steel box and then welded on U-shaped steel plates of different specifications. Then two U-shaped steel plates are assembled into two A closed magnetic circuit composed of two large magnetic blocks that can move each other, when the sorting gap is 30mm, the uniform magnetic induction intensity of the closed magnetic field background can reach 0.9T.

Domestic Changsha Research Institute of Mining and Metallurgy and Moscow University of Mining and Technology jointly developed a CRIMM double-box reciprocating permanent magnet high-gradient magnetic separator and applied it to the iron removal production of non-metallic ores such as feldspar, nepheline and kaolin. The machine consists of two reciprocating It is composed of linear motion sorting box, supporting limit guide rail, etc.; the double sorting box is equipped with a stack of multi-dimensional magnetically concentrated sorting media. When the sorting box enters the magnet, the magnetic induction intensity of the medium surface is above 1.3T, and the magnetic field gradient is above 106T/m , The closed magnetic field has a uniform background magnetic induction intensity of more than 0.8T.

In addition, Feng Dingwu and others also conducted a study on a belt-type permanent magnet high-gradient magnetic separator, which also adopted a counter-pole magnetic system structure. It consists of electromagnetic vibration coil and frame. The magnetic system is composed of armored NdFeB magnets (the magnetic energy product is 255kJ/ m ³ , and the residual magnetic induction is 1.1T). The background field strength of the sorting magnetic field can be adjusted by adjusting the magnetic pole spacing (20-150mm) up and down the magnetic system. (0.35～0.70T), the medium belt is woven by steel wool medium, and two electromagnetic vibration coils are installed on the medium belt, the high-frequency and low-amplitude vibration generated by it can improve the selectivity of material sorting. Zhang Jingsheng et al. analyzed and calculated the magnetic field characteristics of the window frame antipole permanent magnet structure between 30-100mm, and the results showed that the working background magnetic field of the rare earth permanent magnet window frame antipole closed magnet can reach up to 0.6T. Jiao Hongguang et al. used the direct stacking of square permanent magnets to form magnetic poles and symmetrically arranged them to form a counter-pole strong magnetic separator, and carried out the magnetic field characteristics and experimental research of this counter-pole permanent magnet strong magnetic separator. In the above, the large permanent magnets are consolidated with the iron yoke to directly form the poles of the opposite pole closed magnetic system, and some use small permanent magnets to directly superimpose and extrude the magnetic poles to form the opposite pole closed magnetic system structure. The closed-pole magnetic system structure still has relatively low magnetic field strength and narrow separation space in the separation of weak magnetic or extremely weak magnetic powders, and most of them are intermittent operations, which cannot be continuous operations.

Contents of the invention

The object of the present invention is to provide a continuous operation mid-split double dipole permanent magnet high-gradient strong magnetic separation device aimed at the shortcomings of the above-mentioned prior art.

The continuous mid-divided double dipole type magnetic system permanent magnet high gradient strong magnetic separation device of the present invention can be realized by the following technical measures:

(1) The whole machine is arranged in the middle split double pole structure, centering on the rotation axis of the magnetic gathering medium cylinder, the same magnetic system yoke is symmetrically arranged to form the magnetic poles of the front and rear symmetrical opposite pole structure of the whole machine (when the gathering When the magnetic medium cylinder rotates around the axis for sorting movement, the sorting space can be further increased, the processing capacity can be further increased, and continuous sorting can be carried out at the same time), and the structure of the whole machine is symmetrical with the radial center plane of the magnetic medium cylinder The surface constitutes the magnetic poles of the left and right middle split symmetrical pole structure, which improves the long-term operation reliability of the equipment;

(2) The magnetic gathering medium cylinder adopts the structural form of a polygonal magnetic gathering medium cylinder, and the magnetic gathering medium cylinder is arranged symmetrically along the length direction on both sides of the vertical line of the magnetic gathering medium cylinder (the radial central plane is a symmetrical plane). The inner cavity of the magnetic medium cylinder is divided into several areas with equal areas, and the areas located at both ends of the inner cavity of the magnetic medium cylinder are symmetrically installed with magnetic accumulation media, while the adjacent areas on both sides of the mid-perpendicular line are non-magnetic accumulation medium areas, and the rest According to the change of mineral powder physical properties in each area, it is necessary to install magnetic concentrating media with different density and shape. When magnetic concentrating media is installed in a certain area, it can form a high gradient separation and increase the concentrate yield; magnetic concentrating media The magnetic gathering medium of the medium cylinder can be replaced according to the change of the physical properties of the mineral powder.

(3) The feeding trough, non-magnetic material collection trough and magnetic material collection trough all match the structure and size of the magnetic accumulation medium cylinder. The cylinder is the same, adopts the shape of a polygonal groove, and is buckled on the top of the whole machine, that is, the polygonal groove is in contact with the magnetic accumulation medium cylinder; the non-magnetic material collection tank is in contact with the bottom of the magnetic accumulation medium cylinder, and the left, right and The lower part adopts a planar structure, and the upper part adopts a planar groove; the left, right and lower parts of the magnetic collection tank adopt a planar structure, and the upper part is the same as the magnetic gathering medium cylinder, which adopts an arc groove shape and is placed on the upper part of the non-magnetic collection tank. In the plane groove; the size of the magnetic material collection tank must ensure that it can be placed in the plane groove on the upper part of the non-magnetic material collection tank. Therefore, it is also particularly required that the feeding tank, magnetic material collection tank and non-magnetic material It is consistent with the size of the magnetic gathering medium cylinder.

(4) The magnetic poles use square NdFeB permanent magnets with five sides of extruded soft iron materials on the upper, lower, left, right and tail sides as the magnetic poles, that is, the upper, lower, left and right sides of the square soft iron and the ends close to the yoke of the magnetic system are uniform. There are square high-performance NdFeB NdFeB permanent magnets extruded on five sides with the same pole, and square soft iron materials are used as magnetic poles to guide the magnetic force lines; and the square soft iron magnetic poles extruded on five sides are symmetrically arranged to form an opposite pole structure.

In the present invention, the adjacent magnetic poles N or S of the square soft iron magnetic pole after the five-sided extrusion appear alternately, and at the same time, corresponding to the opposite pole type magnetic pole, it can be N——S closed, forming a short path and relatively low reluctance. Low adjacent and relative magnetic circuits make the background field strength of the sorting space relatively uniform; if the mineral powder has broad physical properties, the opposite pole magnetic system arranged on the other side can be constructed of five sides with square ordinary NdFeB magnetic materials Extruded square soft iron poles.

In the present invention, the cavity of the magnetism-gathering medium cylinder is divided into four regions with equal areas, and the regions located at both ends of the magnetism-gathering medium cylinder are symmetrically installed with magnetism-gathering media, while the adjacent regions on both sides of the mid-perpendicular line are without Polymagnetic medium area. During the rotation of the magnetic gathering medium cylinder around the axis, when it passes through the magnetic field space of the double dipole magnetic system, the magnetic objects are attracted, and the non-magnetic objects will fall into the non-magnetic object collection tank; when it passes through When there is no magnetic field space at the bottom of the double dipole magnetic system, the magnetic objects fall into the magnetic object collection tank, which can realize continuous sorting and discharging. The magnetic gathering medium cylinder adopts a polygonal shape, which can generate greater mechanical energy in the sorting space than the cylindrical magnetic gathering medium cylinder, reducing the influence of powder agglomeration, facilitating discharge, and improving product quality in continuous sorting operations .

The beneficial effects of the present invention are as follows:

(1) The structure of the whole machine is arranged by the closed magnetic system with double dipoles in the middle, which can not only reduce the reluctance but also prevent the leakage of magnetic flux, and the background magnetic field is strong and uniform; the structure of the double dipoles in the middle increases the separation space and processing It improves the efficiency of the sorting operation and enhances the stability and reliability of the overall structure. Square high-performance NdFeB NdFeB permanent magnets extrude square soft iron on five sides as magnetic poles, which can reduce magnetic flux leakage and reluctance in the magnetic circuit, increase the magnetic field strength and depth of action at the magnetic poles, and improve the separation space. background magnetic field strength.

(2) The magnetic accumulation medium is placed symmetrically in the magnetic accumulation medium cylinder, which can generate greater mechanical energy than the cylindrical magnetic accumulation medium cylinder, and reduce the influence of powder agglomeration; during the sorting operation, the magnetic accumulation medium cylinder Rotation, matching special corresponding feeding trough, non-magnetic material collection trough and magnetic material collection trough, can realize automatic continuous sorting and continuous discharge, further improve the efficiency of sorting operation, and facilitate the realization of automation in the future.

(3) The structure of the whole machine is simple, compact, light in weight, less in land occupation, high in concentration, low in manufacturing cost, low in operating energy consumption, easy to maintain, long in service life, less in auxiliary equipment, easy to use and maintain, suitable for dry separation .

Description of drawings

Fig. 1 is a schematic diagram (top view) of the overall structure of the present invention.

Fig. 2 is a schematic view of the front view of the present invention.

Fig. 3 is a left view structure diagram of the present invention.

Fig. 4 is a schematic diagram of a square permanent magnet with five-sided extruded square soft iron poles and a single pair of poles.

Fig. 5 is a cross-sectional view of the magnetic-gathering medium cylinder.

Fig. 6 is a schematic diagram of a matching feeding trough.

FIG. 7 is a side view of FIG. 6 .

FIG. 8 is a top view of FIG. 6 .

Fig. 9 is a schematic diagram of a non-magnetic substance collection tank.

FIG. 10 is a side view of FIG. 9 .

FIG. 11 is a top view of FIG. 9 .

Fig. 12 is a schematic diagram of a magnetic object collection tank.

FIG. 13 is a side view of FIG. 12 .

FIG. 14 is a top view of FIG. 12 .

Serial numbers in the figure: 1-frame, 2-supporting platform, 3-square permanent magnet for extrusion at the lower part, 4-magnetic system yoke, 5-rotating shaft, 6-magnetic medium cylinder, 7-feeding trough, 8 -Square permanent magnet for upper extrusion, 9-One of several square permanent magnets for middle extrusion, 10-One of several square soft iron magnetic poles for middle extrusion, 11-Square permanent magnet for extrusion close to the yoke, 12-magnetic collection tank, 13-non-magnetic collection tank, 14-square permanent magnet for middle extrusion and square soft iron magnetic pole group for middle extrusion, 15-magnetic field line, 16-polygon outer edge of magnetic medium cylinder, 17- Square hole of magnetic gathering medium, 18-circular inner edge of magnetic gathering medium cylinder, 19 feeding trough inlet, 20-multilateral groove of feeding trough, 21-plane groove of non-magnetic material collection tank, 22-magnetic material collection Slot arc groove.

Detailed ways

The present invention will be further described below in conjunction with embodiment (accompanying drawing):

As shown in Figures 1, 2, and 3, the magnetic system device of the present invention is mainly composed of a frame 1, a support platform 2, a square permanent magnet 3 for extrusion at the bottom, a magnetic system yoke 4, a rotating shaft 5, and a magnetic gathering medium cylinder 6 , feeding trough 7, upper square permanent magnet for extrusion 8, one of several square permanent magnets for middle extrusion 9, one of several square soft iron magnetic poles for middle extrusion 10, square permanent magnet for extrusion close to the yoke Composed of magnet 11, magnetic material collection tank 12, non-magnetic material collection tank 13, square permanent magnet for middle extrusion, and middle extrusion square soft iron magnetic pole group 14;

To be specific: the whole machine of the present invention adopts a center-divided double-opposite structure arrangement, and the same magnetic system yoke 4 is symmetrically arranged around the rotating shaft 5 of the magnetic-gathering medium cylinder 6 to form a symmetrical anti-pole structure of the whole machine. The magnetic poles (when the magnetic gathering medium cylinder rotates around the axis for sorting movement, the sorting space can be further increased, the processing capacity can be further increased, and continuous sorting can be carried out at the same time), and the structure of the whole machine is based on the magnetic gathering medium cylinder 6 The radial central plane is a symmetric plane to form a left and right center split symmetrical polar structure magnetic pole, which improves the long-term operation reliability of the equipment; The inner cavity of the magnetic accumulation medium cylinder is divided into four areas with equal areas in a symmetrical arrangement along the length direction on both sides of the mid-perpendicular line of the magnetic accumulation medium cylinder. medium, and the adjacent areas on both sides of the vertical line are non-magnetic accumulation medium areas. During the rotation of the magnetic accumulation medium cylinder around the axis, when it passes through the magnetic field space of the split double dipole magnetic system, the magnetic material is Attracted, non-magnetic objects will fall into the non-magnetic object collection tank; when it passes through the lowermost non-magnetic field space of the double dipole magnetic system, the magnetic objects will fall into the magnetic object collection tank, which can realize Continuous sorting and discharging. The magnetic gathering medium cylinder adopts a polygonal shape, which can generate greater mechanical energy in the sorting space than the cylindrical magnetic gathering medium cylinder, reducing the influence of powder agglomeration, facilitating discharge, and improving product quality in continuous sorting operations .

As shown in Figures 2 and 3, the feeding tank 7 (see Figures 6, 7 and 8), the non-magnetic material collecting tank 13 and the magnetic material collecting tank 12 described in the present invention are all in the same structure and size as the magnetic gathering medium cylinder. Matching, the left, right and upper parts of the feed chute adopt a planar structure, the lower part is the same as the magnetic gathering medium cylinder, adopts a polygonal groove shape, and is buckled on the uppermost part of the whole machine, that is, its multilateral groove is in line with the magnetic gathering medium cylinder contact; the non-magnetic collection tank is in contact with the bottom of the magnetic-gathering medium cylinder, the left, right and lower parts all adopt plane structures, and the upper part adopts plane grooves (see Figures 9, 10 and 11); the magnetic collection tank left , the right and lower parts adopt a plane structure, the upper part is the same as the magnetic gathering medium cylinder, and adopts an arc groove shape, and is placed in the plane groove on the upper part of the non-magnetic material collection tank (see Figure 12, 13, 14); the magnetic material collection tank The size must ensure that it can be placed exactly in the plane groove on the upper part of the non-magnetic material collection tank. Therefore, it is also specially required that the feeding tank, magnetic material collection tank and non-magnetic material collection tank are all consistent with the size of the magnetic accumulation medium cylinder .

As shown in Figure 4, the magnetic poles use square neodymium iron boron NdFeB permanent magnets on the top, bottom, left, right and tail of the five-sided extruded soft iron material as the magnetic poles, that is, the top, bottom, left and right sides of the square soft iron and the magnets close to the magnetic system. The yoke end has a square high-performance NdFeB NdFeB permanent magnet with five-sided copolar extrusion, and the square soft iron material is used as the magnetic pole to guide the magnetic force line; and the square soft iron magnetic poles after five-sided extrusion are arranged symmetrically to form an opposite pole type Structure; the adjacent magnetic poles N or S of the square soft iron magnetic pole after the five-sided extrusion appear alternately, and at the same time, the opposite pole type magnetic pole can be N-S closed, forming a short path and low magnetic resistance The adjacent and relative magnetic circuits make the background field strength of the sorting space relatively uniform; if the mineral powder has wide physical properties, the opposite pole magnetic system arranged on the other side can use square ordinary NdFeB NdFeB magnetic materials to construct five-sided extrusion Pressed square soft iron poles.

Concrete structure of the present invention, installation connection mode are as follows:

First, place the half-width magnetic system yoke 4 flat on a non-magnetic stainless steel plate, and then press the square permanent magnet 11 close to the magnetic yoke to be fully consolidated on the front and rear of the magnetic system yoke 4 by mechanical means such as bonding and adding bolts. On the symmetrical position on both sides, the magnetic force between the square permanent magnet 11 for extrusion close to the yoke and the magnetic system yoke 4 is not enough to make the subsequent five-sided extrusion magnetic poles firm, so the square permanent magnet for extrusion close to the yoke The permanent magnet 11 and the magnetic system yoke 4 need to be connected by mechanical connection methods such as bolts or welding, and placed in a safe zone after completion, and kept away from ferromagnetic substances. Then on the non-magnetic stainless steel plate, utilize the non-magnetic material to make the fixing tool, and one of the several permanent magnets of the square shape 9 and one of the soft iron magnetic poles 10 of the middle two extrusions in the middle are extruded and installed on the Together, it is required to extrude several permanent magnets and the size of the soft iron magnetic poles to be the same. On this basis, special technological measures are adopted to complete the middle extruded square permanent magnet and the middle extruded square soft iron magnetic pole group 14 in the same way. At this moment, double homopolar extruded magnetic poles are formed, and then the square permanent magnets 3 and the upper extruded square permanent magnets 8 are used for extruding the lower part respectively with the square permanent magnets and the extruded square soft irons used for extruding in the corresponding middle part. The other two sides of the magnetic pole group 14 are extruded and fixed together, the lower part is extruded with a square permanent magnet 3, the upper part is extruded with a square permanent magnet 8, and the middle part is extruded with several square permanent magnets and the middle extruded square soft iron magnetic pole group 14 It is connected by bolts with double nuts on all sides, and the non-magnetic stainless steel plate is fixed around several square permanent magnets for middle extrusion and square soft iron magnetic pole group 14 for middle extrusion; Then, some middle extruded square permanent magnets and the middle extruded square soft iron magnetic pole group 14 are consolidated on the square permanent magnets used for extruding at the place close to the magnetic yoke 4 on the magnetic system yoke 4 that has been partially assembled in the safety zone. Directly above the magnet 11, it is mainly through the reserved hole when the magnetic yoke 4 is connected with the square permanent magnet 11 for extrusion close to the yoke, and the square permanent magnet for extrusion in the middle and the square soft iron for extrusion in the middle are surrounded. The four non-magnetically conductive non-conductive steel plates around the magnetic pole group 14 are connected with double nut bolts; the soft iron magnetic poles extruded on five sides with the same pole are assembled like this. Assemble the other half in the same way, and the correspondence mentioned here is to ensure that five magnetic poles of the same polarity can be formed at each soft iron magnetic pole. And ensure that the sum of the lengths of the upper and lower permanent magnets is equal to the sum of the lengths of the extruded permanent magnets close to the yoke, and must also be equal to the sum of the widths of the square permanent magnets for the middle extrusion and the square soft iron magnetic pole groups for the middle extrusion . The width of the upper and lower permanent magnets is the same as that of the extruded permanent magnets, and both are less than a certain length of extruded soft iron magnetic poles. As shown in Figure 4, the assembly of the closed permanent magnet magnetic system of the present invention is assembled according to the polarity requirements, and the five-sided homopolar extrusion magnetization technology is used to pass multiple permanent magnets of different specifications with different magnetization. This is achieved in the form of extruded soft iron.

Next, place the four frames 1 flat on the non-magnetic plane, weld the four corners of the support platform 2 above the four frames 1; then weld the assembled magnetic yoke 4 on the support platform 2 On the upper part of one of the left and right sides, the other half of the magnetic system yoke 4 that has been assembled is also welded to the upper part of the side where the left and right sides of the support platform 2 are arranged symmetrically, thus forming a set of opposite pole closed magnetic system structures. In the same way, install another set of opposite-pole closed magnetic system structures at the front and rear symmetrical positions of the magnetic system yoke 4, and pay due attention to the installation distance to prevent the sudden disappearance of the magnetic path.

Then, install the rotating shaft 5 on the uppermost part of the middle position of the two magnetic system yokes 4. Before installation, pay attention to pre-install the magnetic collecting medium cylinder 6 on the rotating shaft 5 of the magnetic collecting medium cylinder. The double bolts are fixed.

Finally, the feeding chute 7 is buckled on the magnetic system yoke 4 of the magnetic gathering medium cylinder 6, and the feeding chute 7 is fixed on the magnetic system yoke 4 by bolts. Next, place the magnetic object collection tank 12 in the plane groove 21 of the non-magnetic object collection tank, and then place the assembly on the support platform 2 and directly below the magnetic collecting medium cylinder 6 .

The frame 1 of the present invention, the support platform 2, the magnetic-gathering medium cylinder 6 of the polygonal structure, the feeding chute 7, the non-magnetic material collecting trough 13, and the magnetic material collecting trough 12 all require the use of non-magnetic conductive materials.

Claims (3)

1. divide in a kind of continuity double to pole formula magnetic system permanent-magnet high gradient high intensity magnetic separation device, it is characterised in that：

（1）Complete machine is point double in using to arrange to pole formula structure, using being arranged symmetrically phase centered on the rotary shaft of magnetic matrix cylinder Mode with magnetic system yoke is formed before and after complete machine symmetrically to the magnetic pole of pole formula structure, and complete machine structure is again with magnetic matrix cylinder Radial center face for the plane of symmetry form left and right midsplit type symmetrically to the magnetic pole of pole formula structure；

（2）The magnetic matrix cylinder uses the structure type of polygon magnetic matrix cylinder, and in the perpendicular bisector two of magnetic matrix cylinder Magnetic matrix tube inner chamber is divided into the region of several area equations by side in a manner of symmetrically arranged along its length, positioned at poly- The region at magnetizing mediums tube inner chamber both ends is symmetrically installed with magnetic matrix, and the adjacent area positioned at perpendicular bisector both sides is to be situated between without poly- magnetic Matter area, needed according to the change of mineral powder physical property in remaining each region that different, the different poly- magnetic of density size is installed Medium, form high gradient sorting；

（3）The structure and size of feeder trough, nonmagnetics collecting tank and Magnetic Materials collecting tank with magnetic matrix cylinder match, institute It is identical with magnetic matrix cylinder using planar structure, bottom to state the left and right and top of feeder trough, using polygon groove type, button is placed on Complete machine topmost, i.e. its polygon groove are in contact with magnetic matrix cylinder；The nonmagnetics collecting tank and magnetic matrix cylinder bottom It is in contact, left and right and bottom uses plane groove using planar structure, top；The Magnetic Materials collecting tank is left and right and bottom It is identical with magnetic matrix cylinder using planar structure, top, using arc fluting shape, it is placed on the plane on nonmagnetics collecting tank top In groove；

（4）The magnetic pole uses the square extruding soft iron material in square neodymium iron boron NdFeB permanent magnets upper and lower, left and right and the face of afterbody five As magnetic pole, i.e., there are square high-performance Ne-Fe-B NdFeB permanent magnets at the upper and lower of square soft iron, left and right and close magnetic system yoke end Five face homopolarity extruding, and guide the magnetic line of force by the use of square soft iron material as magnetic pole；And the square soft iron magnetic after five faces are extruded Pole be arranged symmetrically being formed to pole formula structure.

2. double in continuity according to claim 1 point exist to pole formula magnetic system permanent-magnet high gradient high intensity magnetic separation device, its feature In：The adjacent pole N or S of square soft iron magnetic pole after the five faces extruding are alternately present, and reply pole formula magnetic pole is made simultaneously Energy N --- S is closed for it, forms adjacent, the relative magnetic loop that path is shorter and magnetic resistance is relatively low.

3. double in continuity according to claim 1 point exist to pole formula magnetic system permanent-magnet high gradient high intensity magnetic separation device, its feature In：The magnetic matrix tube inner chamber is divided into the region of four area equations, positioned at the region pair at magnetic matrix tube inner chamber both ends Title is provided with magnetic matrix, and the adjacent area positioned at perpendicular bisector both sides is without magnetic matrix area.