CN104437844B - Method for increasing magnetic field intensity in magnetic field separation area and magnetic separation equipment - Google Patents

Abstract

The invention relates to a method and equipment for improving the magnetic field intensity of magnetic separation equipment. A method for improving the magnetic field intensity of a magnetic separation area and magnetic separation equipment are based on the following design methods: the N poles, the N poles and the S poles of the square permanent magnetic blocks are arranged in a clearance mode one by one and are compressed to form a permanent magnetic block group, and therefore the original N pole and S pole planar magnetic field of the square magnetic blocks is extruded and converted into a high-field-intensity strip magnetic field which is alternately arranged along the gaps of the square magnetic blocks and has the N poles and the S poles. The invention can obtain the magnetic field intensity which is several times higher than that of the conventional magnetic field arrangement mode, the magnetic field intensity can be further improved by arranging the magnetism gathering medium in the effective range of the extrusion magnetic system, and the application range and the application field of the invention are greatly improved.

Description

Method for increasing magnetic field intensity in magnetic field separation area and magnetic separation equipment

technical field

The invention relates to a method and equipment for increasing the magnetic field intensity of magnetic separation equipment, in particular to a method for increasing the magnetic field intensity of a magnetic field separation area and the magnetic separation equipment.

Background technique

In the existing field of magnetic mineral magnetic separation technology, since the magnetic field strength of a single magnetic block is often low, the magnetic field generated by the N-pole and S-pole planes on both sides of the magnetic block has a poor ability to capture magnetic minerals. Conventional magnetic separation technology often uses A plurality of magnetic blocks are alternately stacked according to N poles and S poles to enhance the magnetic field strength, as shown in Figure 1. The magnetic field strength of the magnetic field generated by the N pole and S pole planes on both sides of the magnetic block group is effectively increased, but with the increase in the number of magnetic blocks, the increase in the magnetic field strength gradually decreases. The conventional ferrite magnetic block (single The magnetic field strength of the magnetic field generated by the N pole and S pole plane on both sides of the magnetic block is about 700Gs). When 7 pieces are superimposed, the magnetic field strength reaches a maximum of about 1700Gs. When the magnetic blocks are superimposed, the magnetic field strength is basically constant. Accompanying drawing 2 is the relationship curve of the magnetic field intensity at the center of the N-pole plane of a conventional ferrite magnetic block and the number of superimposed magnetic blocks measured by experiments. A single square magnetic block with a field strength of about 4500Gs can only increase the field strength to about 7000Gs through superposition, which cannot meet the requirements of weak magnetic mineral separation.

Referring to Figure 3, for the existing magnetic separation equipment, the magnetic system structure as shown in the figure is adopted, the upper limit of the change of the magnetic field strength limits the improvement of the performance of the equipment, and the improvement of the separation efficiency cannot be realized, which greatly restricts the performance of the magnetic separation equipment. Improve and innovate.

Referring to Fig. 4, it is the existing belt-type permanent magnet magnetic separation equipment adopting the above-mentioned principle, adopts circular alloy magnetic blocks to form an extruded magnetic system group to form a magnetic roller, and the magnetic field gradient along the surface of the magnetic roller is parallel to the centerline direction If it is too large, the distribution is uneven. The black circle area in the figure is a relatively strong magnetic field, while the white area has a weak magnetic field. When the minerals are conveyed to the surface of the magnetic roller by the belt, the weakly magnetic minerals located in the white area cannot be effectively captured by the magnetic field, resulting in low removal efficiency of magnetic substances.

In addition, for the conventional magnetic pulley using the above principle, the magnetic minerals are captured by the magnetic field. During the rotation of the magnetic pulley, there is no relative motion between the mineral and the magnetic system. Since the large ore is not easy to be mixed, when processing large ore, the conventional magnetic pulley No technical drawbacks were shown. With the development of crushing and grinding technology, the particle size of magnetite is gradually reduced. The high-pressure roller mill technology reduces the particle size of magnetite to several millimeters. This technology can solve the problem of magnetic separation inclusions caused by conventional magnetic pulleys. , to further improve the grade of raw ore entering the mill and reduce the energy consumption of the mill.

Contents of the invention

The object of the present invention is to address the above-mentioned existing problems and deficiencies, and provide a new magnetic system arrangement structure, a method for increasing magnetic field intensity in a magnetic field separation area, and a magnetic separation device that can greatly improve the efficiency of magnetic separation.

In order to achieve the above purpose, the technical solutions adopted are:

A method for increasing the magnetic field intensity of the magnetic field sorting area, arrange and compress the N poles and N poles, S poles and S poles of several square permanent magnet blocks one by one relative to each other to form a permanent magnet block group, thus the original square The N pole and S pole plane magnetic field of the magnetic block is extruded and transformed into a strip magnetic field of high field strength with N pole and S pole alternately arranged along the magnetic block gap of the square magnetic block group.

Several magnetic gathering media are arranged in the strip magnetic field with high field strength to convert the continuous strip magnetic field into discontinuously distributed magnetic gathering points, thereby further strengthening the field strength of the strip magnetic field.

A strip-shaped high-magnetic field permanent magnet magnetic system designed by the above-mentioned method to improve the magnetic field intensity of the magnetic field sorting area, the permanent magnet block groups are continuously arranged in m groups along the sides of a regular polygon with the number of sides M, forming a center of the regular polygon is the vertex, and m×360°/M is a strip-shaped strong magnetic field permanent magnet system in which N poles and S poles are densely and alternately arranged with wrapping angles, where m≤M.

A permanent magnet magnetic separation equipment for non-metallic ore iron removal using the above-mentioned strip-shaped strong magnetic field permanent magnet system, including a frame, a box with a magnetic mineral discharge port at the top and an open bottom, and a box horizontally arranged in the box. Cylindrical barrel, on the upper part of the box, a strip-shaped high-field permanent magnet magnetic system coaxial with the cylindrical barrel is fixed through a magnetic system fixing frame, and the magnetic system wrap angle of the strip-shaped high-field permanent magnet magnetic system α<90°, the strip-shaped high-field permanent magnet system is set on one side of the cylindrical cylinder and forms a material flow channel between the cylindrical cylinder and the top of the strip-shaped high-field permanent magnet system. The ore supply port is provided with a non-magnetic mineral discharge port corresponding to the lower end of the strip-shaped strong magnetic field permanent magnet system at the bottom of the box, and the end of the cylindrical cylinder is connected with a cylinder that drives the cylindrical cylinder to rotate. In the power mechanism, a needle-shaped magnetic gathering medium is arranged on the surface of the cylindrical barrel.

The left and right sides of the upper part of the box body are provided with a magnetic system fixing frame, and a strip-shaped strong magnetic field permanent magnet system is arranged in the magnetic system fixing frame on both sides, and the front and rear ends of the upper part of the box body are provided with baffles , the magnetic system fixed frame and baffle plate are all sealed and connected with the box body, and the box body, magnetic system fixed frame and baffle plate are filled with water, and the magnetic system fixed frame or baffle plate edge at the mine supply port is opened With overflow tank.

A magnetic mineral permanent magnetic magnetic separation device utilizing the above-mentioned strip-shaped strong magnetic field permanent magnet system, comprising a frame, a box body arranged on the frame, a cylindrical cylinder body fixed horizontally in the box body, and a cylindrical cylinder body arranged on a cylinder A strip-shaped high-magnetic field permanent magnet magnetic system coaxial with the cylindrical cylinder and a power mechanism that drives the strip-shaped high-magnetic field permanent-magnet magnetic system to rotate, and the wrapping angle of the strip-shaped high-field permanent magnet magnetic system is 36° °, an ore feeding port is formed between one side of the cylindrical cylinder and the box body, and an ore unloading baffle is fixedly arranged on the other side wall of the cylindrical cylinder and the bottom of the box body, and the ore unloading baffle keeps the box body It is divided into a concentrate unloading bin and a tailings bin, and a concentrate discharge port and a tailings discharge port are respectively opened at the lower part of the concentrate discharge bin and the tailings bin, and the bottom plate of the tailings bin is formed by One side of the ore opening is inclined to the unloading baffle, and forms a sorting area with the outer wall of the cylindrical cylinder.

A 2-degree-of-freedom ultra-fine-grain magnetic separation equipment for magnetic minerals using the above-mentioned strip-shaped strong magnetic field permanent magnet system, including a frame, a box set on the frame, and a cylindrical tube arranged horizontally in the box body, and a bar-shaped high-field permanent magnet system that is arranged in the cylindrical cylinder and is coaxial with the cylindrical cylinder, and two power mechanisms that drive the rotation of the cylindrical cylinder and the bar-shaped high-field permanent magnet system respectively, The magnetic system wrap angle of the strip-shaped strong magnetic field permanent magnet system is 360°, the ore inlet is formed between one side of the cylindrical cylinder and the box body, and the other side of the cylindrical cylinder is connected to the box body. There is an ore discharge baffle at the bottom, the bottom of the ore discharge baffle is fixedly connected with the bottom plate of the box, the upper part of the ore discharge baffle fits and slides with the surface of the cylindrical cylinder, and the ore discharge baffle separates the box into The concentrate unloading bin and the tailings bin are respectively provided with a concentrate discharge port and a tailings discharge port at the lower part of the concentrate discharge bin and the tailings bin. One side of the mouth is inclined to the unloading baffle, and forms a sorting area with the outer wall of the cylindrical cylinder.

The side of the box body and the bottom plate are in a sealed connection structure, and the box body is filled with water, and an overflow groove is provided on the edge of one side of the box body.

A belt-type permanent magnet magnetic separation device using the above-mentioned strip-shaped strong magnetic field permanent magnet system, including a frame, a feeder arranged on the frame, a vibrating feeder arranged at the lower part of the feeder, and a vibrating feeder arranged on the vibrating feeder. The belt-type magnetic separation device at the feeding end of the device, the belt-type magnetic separation device includes a driving magnetic roller, a driven wheel, a belt, a power mechanism that drives the driving magnetic roller to rotate, and a magnetic material bin and a non-magnetic material bin arranged at the bottom of the magnetic roller. In the material bin, the magnetic roller is a hollow cylindrical cylinder, and a strip-shaped permanent magnetic system with a magnetic system wrapping angle of 360° is fixedly arranged on the inner wall of the cylinder of the magnetic roller.

A 2-degree-of-freedom magnetic pulley using the above-mentioned strip-shaped strong magnetic field permanent magnet system for fine-grained magnetite roughing and throwing tailings, comprising a magnetic pulley body in a hollow cylindrical cylinder, arranged in the magnetic pulley body and connected to the magnetic pulley body. The strip-shaped high-field permanent-magnet magnetic system arranged coaxially with the pulley, and the two power mechanisms that respectively drive the magnetic pulley body and the bar-shaped high-field permanent-magnet magnetic system to rotate in opposite directions, the magnetic system of the strip-shaped high-field permanent magnet system includes The angle is 360°.

Adopt above-mentioned technical scheme, the beneficial effect that obtains is:

① The present invention adopts a new design structure of the magnetic system arrangement, which adopts the way that two adjacent magnetic blocks of the same pole extrude the magnetic system, so that it can obtain a magnetic field intensity several times higher than that of the conventional magnetic field arrangement method. Setting the magnetic gathering medium within the effective range of the system can further increase the magnetic field strength, and its application range and application field have been greatly improved;

② The present invention adopts a new magnetic system arrangement method, and through the analysis and application of the magnetic field intensity variation performance of the new strip-shaped high-magnetic field permanent magnet magnetic system, when it is applied to various screening equipment, the magnetic field intensity is significantly improved. The ability to capture magnetic substances is increased, thereby improving the recovery rate of target minerals; at the same time, the cylinder and the bar-shaped permanent magnet system with strong magnetic field can move in opposite directions, which greatly reduces the adverse effects of non-magnetic substance inclusions on the quality of concentrate , especially suitable for iron removal of ultra-fine minerals and separation and enrichment of iron minerals;

③ The present invention adopts a new magnetic system structure, and the magnetic system and the magnetic pulley body produce relative rotation. During the rotation of the cylinder, the minerals on the belt and the magnetic system produce relative motion, so that the minerals are constantly turned over on the surface of the magnetic pulley. The inclusion of non-magnetic matter is thrown off the surface of the magnetic roller during the continuous turnover of the magnetic aggregates, thereby reducing the inclusion of non-magnetic matter. It has a particularly obvious effect on the magnetic pulley tailing of the fine-grained materials before entering the grinding, which can greatly improve the grinding grade and reduce the grinding cost.

Description of drawings

FIG. 1 is a schematic diagram of the distribution of magnetic lines of force in a superimposed magnetic field of existing magnetic blocks.

FIG. 2 is a relationship curve between the magnetic field intensity at the center of the magnetic block and the number of superimposed magnetic blocks in FIG. 1 .

Fig. 3 is a structural schematic diagram of a conventional magnetic separator cylinder with a superimposed magnetic system.

Fig. 4 is a structural schematic diagram of an existing belt-type permanent magnet magnetic separation device.

Fig. 5 is a schematic structural view of the permanent magnet block group of the present invention.

Fig. 6 is a schematic diagram of the effect structure after adding a magnetic gathering medium.

Fig. 7 is a schematic diagram of the distribution structure of the magnetic bands on the cylindrical surface of the permanent magnet block of the present invention.

Fig. 8 is a structural schematic diagram of the bar-shaped high-field permanent magnet system of the present invention.

Fig. 9 is one of the structural schematic diagrams of the permanent magnet magnetic separation equipment for iron removal of non-metallic ore.

Fig. 10 is the second schematic diagram of the permanent magnet magnetic separation equipment for iron removal of non-metallic ore.

Fig. 11 is one of the structural schematic diagrams of permanent magnet magnetic separation equipment for magnetic minerals.

Fig. 12 is the second structural schematic diagram of permanent magnet magnetic separation equipment for magnetic minerals.

Fig. 13 is one of the structural schematic diagrams of permanent magnet magnetic separation equipment for magnetic minerals with 2 degrees of freedom ultrafine particle size.

Fig. 14 is the second schematic diagram of the structure of permanent magnet magnetic separation equipment for magnetic minerals with 2 degrees of freedom ultrafine particle size.

Fig. 15 is a structural schematic diagram of a belt-type permanent magnet magnetic separation device.

Fig. 16 is a structural schematic diagram of a 2-degree-of-freedom magnetic pulley for roughing and throwing tailings of fine-grained magnetite.

Serial numbers in the figure: 1 is the magnetic block, 2 is the frame, 3 is the magnetic gathering medium, 4 is the box body, 5 is the cylinder body, 6 is the ore feeding port, 7 is the non-magnetic mineral discharge port, 8 is the magnetic mineral discharge port Mine mouth, 9 is overflow tank, 10 is permanent magnetic block group, 11 is ore unloading baffle, 12 is concentrate unloading bin, 13 is tailings bin, 14 is concentrate discharge outlet, 15 is tailings Mine discharge port, 16 is the sorting area, 17 is the bin, 18 is the vibrating feeder, 19 is the belt, 20 is the driving magnetic roller, 21 is the driven wheel, 22 is the motor, 23 is the reducer, 24 is the magnetic pulley body , 25 is the fixed frame of magnetic system, 26 is the material adjusting plate, 27 is the magnetic material bin, and 28 is the non-magnetic material bin.

detailed description

The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment 1: Referring to Fig. 5-Fig. 7, a method for improving the magnetic field intensity of the permanent magnet magnetic field sorting area, the N poles and N poles, S poles and S poles of several square permanent magnet blocks 1 are arranged with relative gaps one by one and The permanent magnetic block group 10 is formed by pressing the fixed frame such as the magnetic system fixed frame, so that the original square magnetic block N pole and S pole planar magnetic field are extruded and transformed into N pole, S pole along the magnetic block gap of the square magnetic block group. A high-strength strip magnetic field with alternating poles.

Several magnetic gathering media are arranged within the effective range of the high field strength strip magnetic field to convert the continuous strip magnetic field into discontinuously distributed magnetic gathering points, thereby further strengthening the field strength of the strip magnetic field.

For the above method of enhancing the magnetic field, it is obtained through experiments that the magnetic field intensity is directly proportional to the density of the magnetic force lines, and inversely proportional to the cross-sectional area through which the magnetic force lines pass. Assuming that the length, width, and thickness of the square magnetic block are L, W, and H respectively, and the gap between adjacent magnetic blocks is n, under the ideal state without considering the magnetic flux leakage, as long as n×(2L+2w)<2L×W, the magnetic field Strength is enhanced. Taking the conventional square magnetic block 85×65×18 as an example, when the distance between the magnetic blocks is 4mm, under ideal conditions, the calculated magnetic field strength of the extruded magnetic system is 9.2 times that of the original planar magnetic field. Due to the influence of factors such as magnetic flux leakage, the magnetic field lines cannot be completely extruded from the magnetic gap, so the magnetic field strength of the extruded magnetic field in practical applications will be lower than the calculated value. It has been determined that when the conventional ferrite monolithic magnetic block (the magnetic field strength at the center of the N-pole plane is 750Gs) is opposite to the N-pole, and the distance between the N-poles is 4mm, the magnetic field strength of the extruded magnetic system is 2600 Gs, which is the original plane magnetic field. 3.5 times that of conventional ferrite magnets (the magnetic field strength in the center of the N-pole plane is determined to be 1150Gs) and the N-pole is opposite to the N-pole. When the distance is 4mm, the magnetic field strength of the extruded magnetic system is 2900 Gs, which is the original plane 2.5 times the magnetic field. Experimental data shows that the design of the extrusion magnetic system greatly improves the magnetic field strength, which is significantly higher than the magnetic field strength of the superimposed magnetic blocks shown in Figure 1; the magnetic field strength of the extrusion magnetic system is not proportional to the magnetic field strength of the plane magnetic field, and the plane magnetic field The higher the field strength, the magnification of the extrusion magnetic field strength gradually decreases.

Embodiment 2: Referring to Fig. 5-Fig. 8, this embodiment adopts the magnetic system arrangement method described in Embodiment 1, and further completes the magnetic system structure applied to the magnetic separation equipment, which is a kind of improved permanent magnetic field The strip-shaped strong magnetic field permanent magnet system of the magnetic field strength in the sorting area, the permanent magnet block group 10 is continuously arranged in m groups along the sides of the regular polygon with the number of sides M, forming the center of the regular polygon as the vertex, m × 360°/ M is a strip-shaped strong magnetic field permanent magnet magnetic system in which N poles and S poles are densely arranged alternately with wrapping angles, where m≤M. According to different magnetic separation equipment, the wrapping angle of the magnetic system is selected according to actual requirements.

Embodiment 3: Referring to Fig. 5-Fig. 9, a permanent magnet magnetic separation equipment for non-metallic ore iron removal, it is a dry magnetic separation equipment, including a frame 2, and a magnetic mineral discharge port 8 at the bottom of the top opening The box body 4 and the cylindrical barrel body 5 arranged laterally in the box body 4 are fixed with a strip-shaped strong magnetic field permanent magnet coaxial with the cylindrical barrel body 5 through a magnetic system fixing frame 25 on the top of the box body 4 Magnetic system, the described strip-shaped strong magnetic field permanent magnet system comprises m permanent magnet block groups that are continuously distributed along the sides of a regular polygon with the number of sides M, wherein m<M, and the described permanent magnet block groups are The N-pole and N-pole, S-pole and S-pole of a plurality of permanent magnet blocks are arranged one by one with gaps and pressed together to form a permanent magnet block group. The magnetic system wrap angle of the strip-shaped strong magnetic field permanent magnet system is α<90 °, the strip-shaped strong magnetic field permanent magnet system is arranged on one side of the cylindrical cylinder 5 and forms a material flow passage between the cylindrical cylinder 5, and the top of the strip-shaped strong magnetic field permanent magnet system is provided with an ore feeder Port 6, a non-magnetic mineral discharge port 7 corresponding to the lower end of the bar-shaped strong magnetic field permanent magnet system is provided at the bottom of the box body 4, and the end of the cylindrical cylinder 5 is connected with a driving cylindrical cylinder 5 rotating power mechanism.

Needle-shaped magnetism-gathering media 3 are evenly distributed on the surface of the cylindrical barrel 5 , and a material adjustment plate 26 is arranged between the magnetic mineral ore discharge port 8 and the non-magnetic mineral ore discharge port 7 . The strip-shaped magnetic field of the strip-shaped strong magnetic field permanent magnet system is transformed into a magnetic gathering point with higher magnetic field intensity and alternately changing N poles and S poles through the needle-shaped magnetic gathering medium 3 arranged on the cylinder body.

The working principle of the present invention is: a needle-shaped magnetism-gathering medium is arranged on the surface of the rotating cylindrical cylinder. With the rotation of the magnetism-gathering medium cylinder, the needle-shaped magnetism-gathering medium is squeezed out of the range of the strip-shaped strong magnetic field of the magnetic system. , the magnetic field near the magnetic gathering medium is greatly strengthened, and the magnetic minerals move to the vicinity of the magnetic gathering medium with a stronger magnetic field under the action of the magnetic force, while the non-magnetic minerals gradually move away from the gathering medium under the action of the centrifugal force generated by the rotation of the magnetic gathering medium cylinder. The surface of the magnetic medium cylinder; during the rotation of the magnetic gathering medium cylinder, the magnetic minerals reunited near the magnetic gathering medium are strongly flipped and reunited under the action of a strip-shaped strong magnetic field in which N poles and S poles are alternately densely arranged, and the mixed non-magnetic materials are thrown out At the same time, the magnetic minerals contained in the non-magnetic minerals that are thrown off the surface of the magnetic gathering medium cylinder are finally separated from the non-magnetic minerals under the multiple actions of multiple sets of planar extrusion magnetic system magnetic groups. Under the comprehensive effect of centrifugal force field and magnetic field, non-magnetic minerals and magnetic minerals are successfully separated into layers, non-magnetic minerals enter the outer non-magnetic material bin, and magnetic materials fall into the magnetic material under the action of gravity when the magnetic-gathering medium leaves the range of the magnetic field. ore warehouse.

Comparison of the effect achieved by conventional magnetic separation equipment: the design of the magnetic system structure of this application, when it is applied to the separation and iron removal of non-metallic ore, greatly improves the field strength in the working area, up to 2T (2-3 times that of conventional technology), the ability to capture weakly magnetic iron minerals is significantly enhanced, so the efficiency of iron removal is high; assuming that the radial radius of the magnetic gathering medium cylinder is R (unit: mm), and the length is L (unit: mm), the material layer thickness is B (unit: mm), the rotating speed is W (unit: r/min), and the dry ore density of non-metallic ore is ρ (unit: g/cm ⁾ , then adopt the application The processing capacity of the equipment is:

60×ρП[(R+B) ² -R ² ]LW×10 ^-9 tons/hour.

Calculated on the basis of a conventional drum magnetic separator Φ1500×4500, when the thickness of the material layer is 2mm, the dry ore density of non-metallic ore is 2.5 g/cm ³ , and the rotating speed of the drum is 20r/min, the calculated processing capacity of the equipment is: 127.3 tons/hour. At present, the maximum processing capacity of non-metallic ore iron removal dry separation strong magnetic separator does not exceed 10 tons/hour, and most of them are about 2-4 tons/hour.

The invention greatly enhances the magnetic field strength and increases the processing capacity of a single device dozens of times, which is a major technical innovation for the current non-metallic ore dry separation and iron removal technology.

This embodiment adopts the design of the new magnetic system structure, which is also suitable for the separation and enrichment of fine-grained lean magnetite, so that the field strength in the working area is greatly improved, and the combination of conventional ferrite magnetic blocks is adopted. The maximum field strength of the magnetic system can reach 4000Gs, which effectively solves the contradiction between the depth (distance) of the magnetic field and the strength of the magnetic field, that is, the effective distance of the magnetic field remains unchanged while the magnetic field is strengthened, so the ability to capture magnetic minerals is greatly enhanced. The recovery rate index of iron ore is effectively guaranteed.

Embodiment 4: Referring to Fig. 5-Fig. 8 and Fig. 10, the structure of this embodiment is basically the same as that of Embodiment 3, and the similarities will not be repeated. The difference is that it is suitable for wet magnetic separation equipment. The left and right sides of the box body 4 top are all provided with magnetic system fixing frames 25, and in the magnetic system fixing frames 25 on both sides are all provided with strip-shaped strong magnetic field permanent magnet systems, and the front and rear ends of the box body 4 top are provided with The baffle plate, the magnetic system fixed frame 25 and the baffle plate and the box body 4 are sealed and connected, and the box body 4, the magnetic system fixed frame 25 and the baffle plate are filled with water. An overflow groove 9 is provided on the edge of the fixed frame 25 or the baffle plate.

In this application, for the problem that a large amount of slime in the fine-grained magnetite separation process has a great adverse effect on the separation, a rotating medium drum is used to produce a strong turning disturbance, and the desliming efficiency is high. The removed slime Part of it is discharged from the non-magnetic mineral discharge port on the left lower part of the equipment, and part of it is discharged from the fine-grained sludge discharge overflow tank specially designed on the upper part of the equipment.

Embodiment 5: Referring to Fig. 5-Fig. 8 and Fig. 11, a permanent magnet magnetic separation equipment for magnetic minerals, which is suitable for dry magnetic separation, includes a frame 2 and a box 4 with an open top on the frame , the cylindrical shell 5 that is horizontally fixed in the box body 4, and the bar-shaped strong magnetic field permanent magnet system that is arranged in the cylindrical shell 5 and is coaxial with the cylindrical shell 5 and drives the permanent magnet magnetic system to rotate The motor and the speed reducer, the described strip-shaped strong magnetic field permanent magnet magnetic system includes M permanent magnet block groups 10 that are continuously distributed along the sides of a regular polygon whose number of sides is M, and the described permanent magnet block groups 10 are The N pole and N pole, S pole and S pole of 6-20 permanent magnet blocks 1 are arranged in relative gaps one by one and pressed together to form a permanent magnet block group, and a magnetic concentrator is arranged between two adjacent permanent magnet blocks 1 Medium 3, an ore feeding opening 6 is formed between one side of the cylindrical cylinder 5 and the box body 4, and an ore unloading baffle 11 is fixedly arranged on the other side wall of the cylindrical cylinder 5 and the bottom of the box body 4, The ore unloading baffle 11 divides the box into a concentrate unloading bin 12 and a tailings bin 13, and a concentrate discharge port 14 and a tailings discharge port are respectively opened at the lower parts of the concentrate unloading bin 12 and the tailings bin 13 15. The box bottom plate of the tailings bin 13 is inclined to the ore discharge baffle 11 from the side close to the ore feeding port 6, and forms a sorting area 16 with the outer wall of the cylindrical cylinder 5.

This embodiment is a dry sorting equipment. The strip-shaped strong magnetic field permanent magnet system is located inside the fixed cylindrical cylinder. The minerals are fed in according to the position shown in the figure, and gradually approach the surface of the cylinder under the action of gravity. When moving to the range of the magnetic field When inside, the magnetic minerals form a semicircular cylinder distributed along the strip magnetic field under the action of the strip magnetic field on the surface of the cylinder, and the non-magnetic materials move to the tailings bin under the action of gravity, and are discharged from the tailings discharge port; With the rotation of the strip-shaped strong magnetic field permanent magnet magnetic system, the cylinder-like bodies gathered on the surface of the cylinder will continue to roll along the surface of the cylinder, and the gangue minerals mixed in it will be thrown out from the tailings discharge port. When the ore moves to the concentrate unloading area, it is separated from the effect of the magnetic field, and is discharged from the concentrate discharge port under the action of gravity.

Embodiment 6: Referring to Fig. 5-Fig. 8 and Fig. 12, the structure of this embodiment is basically the same as that of Embodiment 5, and the similarities will not be repeated. The difference lies in: the side of the box body 4 It is a sealed connection structure with the bottom plate, and the box body 4 is filled with water, and an overflow groove 9 is provided on the edge of the box body 4 one side.

This embodiment is a wet sorting equipment. The strip-shaped strong magnetic field permanent magnet system is located inside the fixed cylinder. When the slurry is fed in according to the position shown in the figure, it will gradually approach the surface of the cylinder under the action of gravity and flow field. When When flowing through the range of the magnetic field, under the action of the strip magnetic field on the surface of the cylinder, the magnetic material forms a quasi-semicircular cylinder distributed along the strip magnetic field, while the non-magnetic material moves to the tailings under the action of gravity and flow field The silo is discharged from the tailings discharge port; with the rotation of the extrusion magnetic system, the cylinder-like bodies gathered on the surface of the cylinder continue to roll along the surface of the cylinder, throwing out the coarse-grained gangue minerals mixed in it and finally from the The tailings are discharged from the ore discharge port, while the fine-grained gangue minerals are discharged from the overflow port on the upper part of the equipment under the action of the flow field generated by the magnetic material rolling along the circumferential surface; the final magnetic separation concentrate moves to the concentrate unloading bin When separated from the effect of the magnetic field, it is discharged from the concentrate ore discharge port under the action of gravity.

Embodiment 7: Referring to Fig. 5-Fig. 8 and Fig. 13, a permanent magnet magnetic separation equipment for magnetic minerals with 2 degrees of freedom ultra-fine particle level, it is a dry magnetic separation equipment, including a frame 2, which is arranged on the frame 2 The upper casing 4, the horizontally arranged cylindrical casing 5 in the casing 4, and the strip-shaped strong magnetic field permanent magnet system coaxial with the cylindrical casing 5, and drive respectively Cylindrical cylinder body 5 and two power mechanisms that the strip-shaped high-field permanent-magnet magnet system rotates, the power mechanism includes a motor and a reducer, and the magnetic system wrap angle of the strip-shaped high-field permanent-magnet magnet system is 360° °, the strip-shaped strong magnetic field permanent magnet system includes M permanent magnet block groups 10 that are continuously distributed along the sides of a regular polygon whose number of sides is M, and the described permanent magnet block groups 10 are 6-20 The N-pole and N-pole, S-pole and S-pole of the permanent magnet block are arranged in a relative gap one by one and pressed together to form a permanent magnet block group. A magnetic accumulation medium is arranged between two adjacent permanent magnet blocks. The cylinder An ore discharge port 6 is formed between one side of the cylindrical cylinder 5 and the box body 4, and an ore discharge baffle 11 is provided on the other side of the cylindrical cylinder 5 and the bottom of the box 4, and the bottom of the described ore discharge baffle 11 It is fixedly connected with the bottom plate of the box 4, and the upper part of the ore unloading baffle 11 fits and slides with the surface of the cylindrical cylinder 5. The ore unloading baffle 11 separates the box 4 into a concentrate unloading bin 12 and a tailings bin 13. A concentrate ore discharge port 14 and a tailings discharge port 15 are respectively provided at the bottom of the concentrate unloading bin 12 and the tailings bin 13. It is installed obliquely toward the ore unloading baffle 11, and a sorting area 16 is formed between it and the outer wall of the cylindrical cylinder.

This embodiment is a 2-degree-of-freedom dry-type magnetic separation equipment. The strip-shaped strong magnetic field magnetic system is located inside the cylinder, and the minerals are fed in according to the position shown in the figure. When within the range of the magnetic field, the magnetic minerals form a quasi-semicircular cylinder distributed along the strip magnetic field under the action of the strip magnetic field on the surface of the cylinder, and the non-magnetic materials move to the tailings bin under the action of gravity, and are discharged from the tailings Discharge from the mine mouth; under the action of the two-way rotation of the strip-shaped strong magnetic field permanent magnet system and the drum, the cylinder-like magnetic matter gathered on the surface of the cylinder rolls strongly along the surface of the cylinder, and the gangue minerals mixed in it are thrown out from the cylinder. The tailings are discharged from the ore discharge port, and when the magnetic separation concentrate moves to the unloading bin, it is discharged from the concentrate discharge port under the action of the ore discharge baffle.

Embodiment 8: Referring to Fig. 4-Fig. 6 and Fig. 14, the structure of this embodiment is basically the same as that of Embodiment 7, and the similarities will not be repeated. The difference lies in: the side and the bottom plate of the box 4 There is a sealed connection structure between them, and the box is filled with water, and an overflow groove 9 is provided on the edge of one side of the box body 4 .

This embodiment is a 2-degree-of-freedom wet magnetic separation equipment. The strip-shaped strong magnetic field permanent magnet system is located inside the cylinder body. The surface is close, and when flowing through the range of the magnetic field, the magnetic substance forms a semi-circular cylinder distributed along the strip magnetic field under the action of the strip magnetic field on the surface of the cylinder, while the non-magnetic substance is under the action of gravity and the flow field Move to the tailings bin and discharge from the tailings discharge port; under the bidirectional rotation of the strip-shaped strong magnetic field permanent magnet system and the drum, the cylinder-like magnetic substances gathered on the surface of the cylinder roll strongly along the surface of the cylinder , Throw out the fine-grained gangue minerals mixed in it, part of it is discharged from the tailings discharge port, and part of it is discharged from the overflow port on the upper part of the equipment; when the final magnetic separation concentrate moves to the concentrate discharge bin, it is discharged on the discharge baffle Under the action of the ore, it is finally discharged from the ore discharge port of the concentrate.

Embodiment 9: Referring to Fig. 4-Fig. 6 and Fig. 15, a belt-type permanent magnet magnetic separation device adopting a new magnetic system arrangement form includes a frame 2, a bin 17 arranged on the frame 2, The vibrating feeder 18 that is arranged on the bottom of the feeder 17 and the belt-type magnetic separation device that is arranged on the feeding end of the vibratory feeder 18, the belt-type magnetic separation device includes a driving magnetic roller 20, a driven wheel 21, a belt 19, The motor 22 and reducer 23 that drive the active magnetic roller to rotate, and the magnetic material bin 27 and the non-magnetic material bin 28 arranged on the lower part of the magnetic roller 20, the magnetic roller 20 is a hollow cylindrical cylinder, and the magnetic roller 20 The inner wall is provided with a strip-shaped strong magnetic field permanent magnet magnetic system with a magnetic wrap angle of 360°. The strip-shaped strong magnetic field permanent magnet magnetic system includes M permanent magnets arranged continuously along the sides of a regular polygon with M sides. The magnetic block group 10, the permanent magnetic block group 10 is a permanent magnet formed by the N poles and N poles, S poles and S poles of 6 to 20 permanent magnet blocks 1 being arranged in relative gaps one by one and compressed. Block group, in the permanent magnet block group 10, a magnetization collecting medium is arranged between two adjacent square permanent magnet blocks.

Embodiment ten, referring to Fig. 4-Fig. 6, Fig. 16, a kind of 2 degrees of freedom magnetic pulley of fine-grained magnetite roughing and tailing throwing, comprises the magnetic pulley body 24 that is hollow cylindrical shell structure, is arranged on In the magnetic pulley body 24 and with the magnetic pulley body 24 coaxial strip-shaped high-field permanent magnet system and two power mechanisms that drive the magnetic pulley body 24 and the bar-shaped high-field permanent-magnet magnetic system to rotate relative to each other, the described The drive magnetic pulley body 24 and the two power mechanisms of the strip-shaped strong magnetic field permanent magnet magnetic system all include a motor 22 and a speed reducer 23, and the described strip-shaped strong magnetic field permanent magnet magnetic system comprises continuous sides along a regular polygon with the number of sides M M permanent magnet block groups 10 arranged in distribution, the magnetic system wrap angle of the described strip-shaped strong magnetic field permanent magnet magnetic system is 360 °, and the described permanent magnet block group 10 is 6-20 permanent magnet blocks The N poles and N poles, S poles and S poles are arranged with gaps one by one and compressed to form a permanent magnet block group, and a magnetism gathering medium is arranged between two adjacent permanent magnet blocks 1 .

The invention adopts a new magnetic system structure, and the magnetic system and the magnetic pulley body produce relative rotation. During the rotation of the cylinder, the minerals on the belt and the magnetic system produce relative motion, so that the minerals are continuously turned over on the surface of the magnetic pulley and mixed The non-magnetic materials are thrown off the surface of the magnetic pulley during the continuous flipping of the magnetic aggregates, thereby reducing the inclusion of non-magnetic materials. It has a particularly obvious effect on the magnetic pulley tailing of the fine-grained materials before entering the grinding, which can greatly improve the grinding grade and reduce the grinding cost.

Claims (1)

1. A permanent magnet magnetic separation equipment for non-metallic ore deironing, characterized in that: it comprises a frame, a top open bottom that is provided with a casing for magnetic mineral discharge outlets and a cylindrical barrel that is horizontally arranged in the casing, On the upper part of the box body, a strip-shaped strong magnetic field permanent magnet system coaxial with the cylindrical cylinder is fixedly arranged through the magnetic system fixing frame; The strip-shaped strong magnetic field permanent magnet system is as follows: the N poles and N poles, S poles and S poles of several square permanent magnet blocks are arranged with relative gaps one by one and compressed to form a permanent magnet block group. The N pole and S pole plane magnetic field of the original square magnetic block is extruded and transformed into a strip magnetic field with N pole and S pole alternately arranged along the magnetic block gap of the square magnetic block group; several magnetic gathering media are set in the strip magnetic field to continuously The strip-shaped magnetic field is converted into discontinuously distributed magnetic gathering points, so that the field strength of the strip-shaped magnetic field is further strengthened; the permanent magnet block groups are continuously arranged in m groups along the sides of a regular polygon with M sides to form a regular polygon The center is the apex, and m×360°/M is a bar-shaped permanent magnetic system with dense and alternately arranged N poles and S poles with wrap angles, where m<M; The magnetic system wrap angle α of the strip-shaped high-field permanent magnet system is <90°, and the strip-shaped high-field permanent magnet system is arranged on the outside of the cylindrical cylinder and forms a material flow channel between the cylindrical cylinder and the cylindrical cylinder. The top of the strip-shaped high-magnetic field permanent magnet system is provided with an ore feeding port, and the bottom of the box is provided with a non-magnetic mineral discharge port corresponding to the lower end of the strip-shaped high-field permanent magnet system. The cylindrical The end of the cylinder is connected with a power mechanism that drives the rotation of the cylindrical cylinder, and a needle-shaped magnetic gathering medium is arranged on the surface of the cylindrical cylinder.