CN214347197U

CN214347197U - Magnetic separator

Info

Publication number: CN214347197U
Application number: CN202022726389.1U
Authority: CN
Inventors: 赵武俊; 赵飞
Original assignee: Handan Kunyue Machinery Technology Co ltd
Current assignee: Handan Kunyue Machinery Technology Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-10-08
Anticipated expiration: 2030-11-23

Abstract

The utility model discloses a magnetic separator belongs to magnetic separation equipment technical field. Including the frame, the ore dressing section of thick bamboo, feed arrangement, the concentrate collecting box, the tailing collecting box, let out ore water spray set and ore dressing section of thick bamboo drive arrangement, the ore dressing section of thick bamboo includes cylinder and magnetism system, be fixed with ring form concentrate collection structural layer on the outer wall of ring cylinder, concentrate collection structural layer equipartition concentrate holds the chamber, the concentrate holds the chamber opening in concentrate collection structural layer surface, hold ferromagnetic mineral substance in order to collect, hold between the chamber at the concentrate and be equipped with and let out ore water flushing hole, wash the passageway in order to form to let out ore water, to holding the chamber and let out ferromagnetic mineral substance in the ore water flushing hole and spray through letting out ore water spray set and wash and let out the ore operation, concentrate collection structural layer is ferromagnetic material, in order to concentrate the magnetic force line of cambered surface magnetic separation layer concentrate the restraint in rather than corresponding concentrate collection structural layer. It has the characteristics of high magnetic separation rate, energy conservation, consumption reduction and the like.

Description

Magnetic separator

Technical Field

The utility model relates to a magnetic separation equipment technical field.

Background

The magnetic separator adsorbs ferromagnetic mineral substances on the outer surface of a mineral separation cylinder through a magnetic field generated by a magnetic system in the mineral separation cylinder of the magnetic separator on the outer surface of the mineral separation cylinder, the mineral substances are separated out along with the rotation of the mineral separation cylinder of the magnetic separator, the outer cylinder wall of the mineral separation cylinder of the magnetic separator used at present is directly contacted with air, namely, a magnetic medium of a magnetic separation layer magnetized by the magnetic system is air, the magnetic conductivity is lower, the surface of the outer cylinder wall of the mineral separation cylinder of the magnetic separator is smooth and is not beneficial to the storage of the mineral substances, because the magnetic field intensity of a permanent magnetic separator (the magnetic system is a permanent magnet) is weaker than that of an electromagnetic separator, the generated magnetic force lines are more dispersed on the outer cylinder wall of the mineral separation cylinder of the magnetic separator, the magnetic field intensity conducted to the magnetic separation layer is lower, the magnetic field intensity required for the magnetic separation of the mineral substances with weak magnetism such as hematite is difficult to achieve, and the magnetic field intensity required for the magnetic separation of the mineral substances with weak magnetism needs to use the electromagnetic separator (the electromagnet) with stronger magnetic field intensity, the magnetic separation layer achieves higher magnetic field intensity required by the magnetic separation of the weakly magnetic minerals by consuming electric energy. Therefore, at present, for weakly magnetic minerals such as hematite and the like, an electromagnetic concentrator is required for magnetic separation, the energy consumption is high, and the ore dressing cost is high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a magnetic separator, it has magnetic separation rate height, characteristics such as energy saving and consumption reduction.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is:

a magnetic separator comprises a rack, a mineral separation barrel, a feeding device, a concentrate collecting box, a tailing collecting box, a mineral drainage spraying device and a mineral separation barrel driving device, wherein the mineral separation barrel comprises a roller and a magnetic system, the roller is rotatably connected with the rack, the magnetic system is arranged in the roller and comprises a magnetic system fixing support and a group of magnets, the magnets are fixed by the magnetic system fixing support, an arc-shaped magnetic induction surface matched with the curved surface of the inner wall of the roller is formed on the outer surface of the magnetic system fixing support, and the magnetic system fixing support is fixedly connected with the rack so that the arc-shaped magnetic induction surface of the magnetic system is close to the inner wall of the roller, and therefore, an arc-shaped magnetic separation layer with a magnetic field is generated in the surface space of the outer wall part of the roller close to the arc-shaped magnetic induction surface; the feeding device guides the ore slurry to the cambered surface magnetic separation layer;

the ore dressing drum driving device drives the drum to rotate, tailings which are not adsorbed by the cambered magnetic separation layer in ore slurry fall under the action of gravity, and the falling position of the tailings is the position of a feeding hole of a tailing collecting box, so that the tailing collecting box collects the tailings; the outer wall of the roller rotating into the cambered surface magnetic separation layer continuously adsorbs ferromagnetic mineral substances in the ore slurry, and the falling position of the ferromagnetic mineral substances on the outer wall of the roller after rotating out of the cambered surface magnetic separation layer is the position of a feed inlet of the concentrate collecting box due to the loss of magnetic attraction, so that the concentrate collecting box collects the ferromagnetic mineral substances; the water sprayed out of the spraying port of the ore discharge water spraying device washes ferromagnetic mineral substances which do not fall to the concentrate collecting box because of being adhered to the outer wall of the roller into a feeding port of the concentrate collecting box, a concentrate collecting structural layer with a circular-ring-shaped cylinder section is fixed on the outer wall of the circular roller, concentrate containing cavities are uniformly distributed on the concentrate collecting structural layer, the concentrate containing cavities are opened on the surface of the concentrate collecting structural layer to collect and contain the ferromagnetic mineral substances, ore discharge water washing holes are arranged between the concentrate containing cavities to form an ore discharge water washing channel, the ferromagnetic mineral substances contained in the concentrate containing cavities and the ore discharge water washing holes are sprayed, washed and discharged through the ore discharge water spraying device, the concentrate collecting structural layer is made of ferromagnetic material to restrain the concentration of the arc magnetic separation layer in the concentrate collecting structural layer corresponding to the arc magnetic separation layer, and the magnetic field intensity of the concentrate collecting structural layer is improved, thereby improving the magnetic separation rate of the concentrate.

The utility model discloses the further improvement lies in:

the concentrate collection structure layer is formed by radially laminating and fixing a plurality of layers of annular grids at intervals, and the grids are formed by fixing metal wires made of ferromagnetic materials in a staggered manner; the meshes of the grid nets which are laminated together form a concentrate accommodating cavity; the spacing gaps between the grids form the ore discharge water flushing holes.

The cambered magnetic separation layer is positioned above the left side of the outer wall of the roller and gradually increases from left to right, the rotation direction of the roller driven by the ore dressing barrel driving device is directed to the high end from the bottom end of the cambered magnetic separation layer, an arc-shaped ore pulp separation guide groove is arranged at the position corresponding to the cambered magnetic separation layer, the inner side wall of the ore pulp separation guide groove is a concentrate collection structure layer, and an ore pulp guide groove communicated with a discharge port of the feeding device is arranged on the outer side wall of the ore pulp separation guide groove; mineral slurry flows into the mineral slurry separation guide groove from the discharge port of the feeding device through the mineral slurry guide groove, so that the mineral slurry is uniformly distributed on the cambered surface of the concentrate collection structure layer, tailings which are not adsorbed by the cambered surface magnetic separation layer in the mineral slurry fall under the action of gravity, and flow into the feed port of the tailing collection box from the lower notch of the mineral slurry separation guide groove; ferromagnetic mineral substances in the ore slurry are adsorbed by the concentrate collecting structure layer corresponding to the position of the cambered surface magnetic separation layer, and rotate to the other side of the roller from the notch on the ore slurry separation guide groove along with the rotation of the roller, and the concentrate discharge water spraying device washes the ferromagnetic mineral substances from the concentrate collecting structure layer and then the ferromagnetic mineral substances fall into the feed inlet of the concentrate collecting box.

The outer side wall of the mineral slurry separation guide groove is also provided with a rinsing water guide groove which is positioned above the mineral slurry guide groove, so that ferromagnetic minerals adsorbed in the concentrate collection structure layer are washed in the upward rotation process of the roller by water flowing down from the rinsing water guide groove in the reverse direction, impurities in the ferromagnetic minerals are washed down, and the ferromagnetic minerals are further purified.

The width of the arc-shaped mineral slurry separation guide groove, the width of the mineral slurry guide groove and the width of the rinsing water guide groove are matched with the width of the roller.

The feeding device comprises a mineral aggregate slurry separation chamber and a rinsing water chamber, the mineral aggregate slurry separation chamber is provided with a block slurry separation structure and comprises a mineral aggregate block separation cavity and a mineral aggregate slurry cavity, the mineral aggregate block separation cavity is arranged on the left side of the mineral aggregate slurry separation chamber in parallel, the mineral aggregate block separation cavity and the mineral aggregate slurry cavity are separated by a partition wall, the partition wall is composed of a partition plate at the lower end and a sieve plate at the upper end, the sieve plate inclines from bottom to top to right, the upper end of the mineral aggregate block separation cavity is a feeding hole, a guide plate for guiding mineral slurry to the sieve plate is arranged below the feeding hole, and a mineral aggregate block outlet is arranged at the lower end of the mineral aggregate block separation cavity so as to guide mineral aggregate blocks screened by the sieve plate out; the lower end of the mineral slurry cavity is provided with a discharge hole of a feeding device communicated with a mineral slurry guide chute; the rinsing water chamber is arranged on the right side of the mineral slurry separation chamber, and the lower end of the rinsing water chamber is communicated with the rinsing water diversion trench; the width of the feeding device is matched with that of the roller.

An ore turning water pipe and a dilution water pipe which are communicated with a water source are respectively arranged above the ore pulp separation chamber and the rinsing water chamber, the length directions of the ore turning water pipe and the dilution water pipe are consistent with the length direction of the feeding device, and water outlet holes are uniformly distributed below the ore pulp separation chamber and the rinsing water chamber; the ore discharge water spraying device comprises more than two spraying water pipes, each spraying water pipe comprises a high-pressure water pipe, one end of each high-pressure water pipe is provided with a water inlet communicated with a high-pressure water source, and nozzles are uniformly distributed on the high-pressure water pipes and used for flushing ferromagnetic mineral substances from the concentrate collecting structure layer to fall into the feed inlet of the concentrate collecting box; the ore dressing drum driving device comprises a speed reducing motor and a gear transmission structure which is in transmission connection with the roller gear; the magnet is a permanent magnet.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the utility model discloses a be fixed with ferromagnetic material's ring form concentrate collection structure layer on the outer wall of ring cylinder to concentrate the magnetic force line on cambered surface magnetic separation layer and retrain in the structure layer rather than corresponding concentrate collection, improve the magnetic field intensity of concentrate collection structure layer, thereby strengthen the appeal of the more weak mineral substance of the magnetic force of relativity (for example hematite), concentrate collection structure layer equipartition concentrate holds the chamber, so that collect and hold ferromagnetic mineral substance, thereby improve concentrate magnetic separation rate. Hold and be equipped with the ore discharge water flushing hole between the chamber at the concentrate to form the ore discharge water and wash the passageway, hold the chamber and let out the ferromagnetic mineral substance in the ore discharge water flushing hole and spray through ore discharge water spray set and wash the operation of letting out the ore deposit in the concentrate.

The cambered magnetic separation layer is positioned above the left side of the outer wall of the roller and gradually increases from left to right, the rotation direction of the roller driven by the ore dressing barrel driving device is directed to the high end from the bottom end of the cambered magnetic separation layer, an arc-shaped ore pulp separation guide groove is arranged at the position corresponding to the cambered magnetic separation layer, the inner side wall of the ore pulp separation guide groove is a concentrate collection structure layer, and an ore pulp guide groove communicated with a discharge port of the feeding device is arranged on the outer side wall of the ore pulp separation guide groove; the magnetic separation is carried out on the mineral substance by the arc-shaped mineral slurry separation guide groove arranged on the side, the mineral separation cylinder has a certain supporting effect on the mineral substance in the rotation process of the mineral separation cylinder, so the requirement on the magnetic field intensity of a magnetic separation layer is reduced, the magnetic separator is not difficult to understand, the magnetic separator is positioned at the bottom of the mineral separation cylinder compared with the magnetic separation layer, the mineral substance adsorbed on the surface of the mineral separation cylinder is directly acted by vertical downward gravity when positioned at the lower half part of the mineral separation cylinder in the rotation process of the mineral separation cylinder, so the magnetic field intensity of the magnetic separation layer has higher requirement, and for the weak-magnetic mineral substances such as hematite and the like, the magnetic separation can be adsorbed by the mineral separation cylinder by smaller magnetic field intensity, meanwhile, the outer side wall of the mineral slurry separation guide groove is also provided with the rinsing water guide groove which is positioned above the mineral slurry guide groove, so that the ferromagnetic mineral substance in a concentrated mineral collection structure layer rotates upwards along with the roller, the water flowed down by the rinsing water diversion trench is washed in the reverse direction to wash down the impurities in the ferromagnetic minerals, and the impurities are further purified to offset the impurities magnetically separated due to the supporting action of the ore dressing cylinder.

It has the characteristics of high magnetic separation rate, energy conservation, consumption reduction and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a schematic structural view of the concentrate collection structure layer of fig. 2;

fig. 4 is a left side view of fig. 3.

In the drawings: 1. a frame; 2. a concentrate collection box; 3. a tailing collection box; 4. a drum; 5. a magnetic system fixing bracket; 6. a magnet; 7. a concentrate collection structure layer; 7-1, a concentrate containing cavity; 7-2, flushing the hole with the mineral drainage water; 8. a mineral slurry separation guide groove; 8-1, a lower notch of the mineral slurry separation guide groove; 8-2, arranging notches on the mineral slurry separation guide grooves; 9. a mineral slurry guide chute; 10. a rinsing water diversion trench; 11. rinsing the water chamber; 12. a mineral aggregate block separation chamber; 12-1, mineral aggregate block outlet; 13. a mineral slurry chamber; 14. a separator plate; 15. a sieve plate; 16. a guide plate; 17. a mine turning water pipe; 18. a dilution water pipe; 19. a high pressure water pipe; 19-1. a nozzle; 20. a reduction motor; 21. a gear transmission structure; 22. an angle adjustment device of magnetic system.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses the standard part that well used all can be purchased from the market, and dysmorphism piece all can be customized according to the description with the record of attached drawing, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding, pasting among the prior art, no longer detailed description here.

As can be seen from the embodiments shown in fig. 1 to 4, the present embodiment includes a rack 1, a mineral separation barrel, a feeding device, a concentrate collecting box 2, a tailing collecting box 3, a mineral drainage spraying device and a mineral separation barrel driving device, wherein the mineral separation barrel includes a roller 4 and a magnetic system, the roller 4 is rotatably connected with the rack 1, the magnetic system is disposed inside the roller 4 and includes a magnetic system fixing bracket 5 and a set of magnets 6, the magnetic system fixing bracket 5 fixes the magnets 6 to form an arc magnetic induction surface adapted to a curved surface of an inner wall of the roller 4 on an outer surface thereof, the magnetic system fixing bracket 5 is fixedly connected with the rack 1 to make the arc magnetic induction surface of the magnetic system close to the inner wall of the roller 4, so as to generate an arc magnetic separation layer having a magnetic field in a surface space of an outer wall portion of the roller 4 close to the arc magnetic induction surface; the feeding device guides the ore slurry to the cambered surface magnetic separation layer;

the ore dressing drum driving device drives the drum 4 to rotate, tailings which are not adsorbed by the cambered magnetic separation layer in ore slurry fall under the action of gravity, and the falling position of the tailings is the position of a feeding hole of the tailings collection box 3, so that the tailings are collected by the tailings collection box 3; the outer wall of the roller 4 rotating into the cambered magnetic separation layer continuously adsorbs ferromagnetic mineral substances in the ore slurry, and after the ferromagnetic mineral substances rotate out of the cambered magnetic separation layer, the ferromagnetic mineral substances are attracted by losing magnetic force and fall from the outer wall of the roller 4 to be the position of a feed inlet of the concentrate collecting box 2, so that the concentrate collecting box 2 collects the ferromagnetic mineral substances; the water sprayed out of the spraying port of the ore discharge water spraying device washes ferromagnetic mineral substances which are adhered to the outer wall of the roller 4 and do not fall to the concentrate collecting box 2 into the feeding port of the concentrate collecting box 2, a concentrate collecting structural layer 7 with a circular-ring-shaped cylinder-shaped section is fixed on the outer wall of the ring roller 4, concentrate containing cavities 7-1 are uniformly distributed on the concentrate collecting structural layer 7, the concentrate containing cavities 7-1 are opened on the surface of the concentrate collecting structural layer 7 to collect and contain the ferromagnetic mineral substances, ore discharge water washing holes 7-2 are arranged between the concentrate containing cavities 7-1 to form an ore discharge water washing channel, the ferromagnetic mineral substances contained in the concentrate containing cavities 7-1 and the ore discharge water washing holes 7-2 are sprayed, washed and discharged by the ore discharge water spraying device, when the ore discharge water spraying device sprays and washes the concentrate collecting structural layer 7, the high-pressure water flow can be sprayed into the concentrate containing cavity 7-1, and then the ore discharge water flushing holes 7-2 between the concentrate containing cavity 7-1 are diffused towards the periphery, so that a high-pressure water flow channel is formed, ferromagnetic mineral substances contained in the concentrate containing cavity 7-1 and the ore discharge water flushing holes 7-2 are flushed into the concentrate collecting box 2, the concentrate collecting structural layer 7 is made of ferromagnetic materials, magnetic force lines of the cambered magnetic separation layer are intensively constrained in the concentrate collecting structural layer 7 corresponding to the cambered magnetic separation layer, the magnetic field intensity of the concentrate collecting structural layer 7 is improved, and the concentrate magnetic separation rate is improved. The positions can be judged by natural rules and daily experience rules or experiments.

The concentrate collecting structure layer 7 is formed by radially laminating and fixing a plurality of layers of annular grids at intervals, and the grids are formed by fixing metal wires made of ferromagnetic materials in a staggered manner; the meshes of the grid nets which are laminated together form a concentrate accommodating cavity 7-1; the spacing gaps between the grids form the mine drainage flushing holes 7-2.

The cambered surface magnetic separation layer is positioned above the left side of the outer wall of the roller 4 and gradually increases from left to right, the rotation direction of the roller 4 driven by the ore dressing barrel driving device is directed to the high end from the bottom end of the cambered surface magnetic separation layer, an arc-shaped mineral slurry separation guide groove 8 is arranged at the position corresponding to the cambered surface magnetic separation layer, the inner side wall of the mineral slurry separation guide groove 8 is a concentrate collection structure layer 7, the width of the mineral slurry separation guide groove 8 is proper to the range that the magnetic field intensity of minerals subjected to magnetic separation can be absorbed on the cambered surface magnetic separation layer, and a mineral slurry guide groove 9 communicated with a discharge hole of a feeding device is arranged on the outer side wall of the mineral slurry separation guide groove 8; mineral slurry flows into a mineral slurry separation guide groove 8 from a discharge port of a feeding device through a mineral slurry guide groove 9, so that the mineral slurry is uniformly distributed on the cambered surface of a concentrate collection structure layer 7, tailings which are not adsorbed by a cambered surface magnetic separation layer in the mineral slurry fall under the action of gravity, and flow into a feeding port of a tailing collecting box 3 from a lower notch 8-1 of the mineral slurry separation guide groove; ferromagnetic mineral substances in the ore slurry are adsorbed by the concentrate collecting structure layer 7 corresponding to the position of the cambered surface magnetic separation layer, rotate along with the roller 4 and are transferred to the other side of the roller 4 from the notch 8-2 on the ore slurry separation guide groove, and the ferromagnetic mineral substances lose magnetic attraction due to the transfer out of the cambered surface magnetic separation layer, and are washed by the concentrate collecting structure layer 7 by the ore discharge water spraying device and fall into the feed inlet of the concentrate collecting box 2.

The outer side wall of the mineral slurry separation guide groove 8 is also provided with a rinsing water guide groove 10, and the rinsing water guide groove 10 is positioned above the mineral slurry guide groove 9, so that ferromagnetic minerals adsorbed in the concentrate collection structure layer 7 are reversely washed by water flowing down from the rinsing water guide groove 10 in the upward rotation process of the roller 4, impurities in the ferromagnetic minerals are washed down, and the ferromagnetic minerals are further purified.

The width of the arc-shaped mineral slurry separation guide groove 8, the width of the mineral slurry guide groove 9 and the width of the rinsing water guide groove 10 are matched with the width of the roller 4.

The feeding device comprises a mineral aggregate slurry separation chamber and a rinsing water chamber 11, the mineral aggregate slurry separation chamber is provided with a block slurry separation structure and comprises a mineral aggregate block separation cavity 12 arranged on the left side of the mineral aggregate slurry separation chamber and a mineral aggregate slurry cavity 13 arranged on the right side of the mineral aggregate slurry separation chamber in parallel, the mineral aggregate block separation cavity 12 and the mineral aggregate slurry cavity 13 are separated by a partition wall, the partition wall is composed of a partition plate 14 at the lower end and a sieve plate 15 at the upper end, the sieve plate 15 inclines from bottom to top to right, the upper end of the mineral aggregate block separation cavity 12 is a feeding hole, a guide plate 16 used for guiding mineral slurry to the sieve plate 15 is arranged below the feeding hole, and the lower end of the mineral aggregate block separation cavity 12 is provided with a mineral aggregate block outlet 12-1 so as to guide mineral aggregate blocks screened by the sieve plate 15 out; the lower end of the mineral slurry cavity 13 is provided with a discharge hole of a feeding device communicated with the mineral slurry guide chute 9; the rinsing water chamber 11 is arranged at the right side of the mineral slurry separation chamber, and the lower end of the rinsing water chamber is communicated with the rinsing water diversion trench 10; the width of the feeding device is adapted to the width of the drum 4.

An ore turning water pipe 17 and a dilution water pipe 18 which are communicated with a water source are respectively arranged above the ore pulp separation chamber and the rinsing water chamber 11, the length directions of the ore turning water pipe 17 and the dilution water pipe 18 are consistent with the length direction of the feeding device, and water outlet holes are uniformly distributed below the ore pulp separation chamber and the rinsing water chamber; the ore discharge water spraying device comprises more than two spraying water pipes, each spraying water pipe comprises a high-pressure water pipe 19, one end of each high-pressure water pipe 19 is provided with a water inlet communicated with a high-pressure water source, and nozzles 19-1 are uniformly distributed on the high-pressure water pipes 19 and used for flushing ferromagnetic mineral substances from the concentrate collecting structure layer 7 and enabling the ferromagnetic mineral substances to fall into a feed inlet of the concentrate collecting box 2; the ore dressing barrel driving device comprises a speed reducing motor 20 and a gear transmission structure 21 which is in gear transmission connection with the roller 4; the magnet 6 is a permanent magnet.

Comparative test data:

the working conditions are as follows: the magnetic separator with the throughput of 60T/h adopts specularite as a mineral separation variety, and the magnetic field intensity of a magnetic separation layer on the outer cylinder wall of the mineral separation cylinder is required to reach 1.2T.

If the concentrate collecting structure layer 7 is not added to the outer cylinder wall of the ore dressing cylinder, the outer cylinder wall of the ore dressing cylinder is directly contacted with air, namely, a magnetic separation layer magnetized by a magnetic system is air, the magnetic conductivity is low, the magnetic resistance is large, and the magnetic field generated by the permanent magnet magnetic system cannot enable the magnetic field intensity of the magnetic separation layer on the outer cylinder wall of the ore dressing cylinder to meet the requirements, so that an electromagnetic ore dressing machine is generally adopted, and the electromagnetic system needs to consume 100KW of electric energy.

Use neodymium iron boron material to be the permanent magnet concentrator of magnetic system, magnet separator ore dressing section of thick bamboo outer tube wall does not add concentrate collection structural layer 7, and ore dressing section of thick bamboo outer tube wall is direct and air contact, promptly, is the air by the magnetic separation layer magnetic conduction medium of magnetic system magnetization, and magnetic conductivity is lower, and the magnetic resistance is great, and the produced magnetic field intensity at magnet separator ore dressing section of thick bamboo outer surface is only 0.6T, can not reach 1.2T's specularite ore dressing requirement.

A concentrate collection structure layer 7 is added to the outer cylinder wall of the ore dressing cylinder of the permanent magnetic ore dressing machine taking neodymium-iron-boron materials as magnetic systems, the concentrate collection structure layer 7 is formed by radially laminating and fixing three layers of grids together, each layer of grid is formed by fixing an upper layer and a lower layer of transverse and longitudinal ferromagnetic material metal wires (silicon steel materials) after being crossed and laminated on the surfaces, and the diameters of the metal wires are 5mm (namely, the thickness of the concentrate collection structure layer 7 is 30 mm); meshes of the laminated grids form a concentrate containing cavity 7-1, and the meshes are square grid holes with the length of 3mm and the width of 3 mm; the interval gaps formed by the transverse and longitudinal ferromagnetic material metal wires among the grids in a laminated mode form ore discharge water washing holes 7-2, and the magnetic field intensity of the center in the concentrate containing cavity 7-1 is improved to 1.2T, so that the mineral separation requirement of specularite is met.

Because the permanent magnet is adopted, the electric energy does not need to be consumed, and the electric energy consumption of an electromagnetic system is saved by 100 KW.

The comparison result shows that the permanent magnet concentrator with the throughput of 60t/h works for 24 hours every day in three hundred days every year according to the ore dressing requirement of specularite, the electricity is saved by 680400kw every year, the electricity per degree is calculated according to 0.6 yuan, and the direct economic benefit is 408240 yuan.

Claims

1. A magnetic separator comprises a frame (1), a mineral separation barrel, a feeding device, a concentrate collecting box (2), a tailing collecting box (3), a mineral drainage spraying device and a mineral separation barrel driving device, the ore dressing barrel comprises a roller (4) and a magnetic system, the roller (4) is rotatably connected with the rack (1), the magnetic system is arranged in the roller (4), the device comprises a magnetic system fixing support (5) and a group of magnets (6), wherein the magnetic system fixing support (5) fixes the magnets (6) to enable the outer surface of each magnet (6) to form an arc-shaped magnetic induction surface matched with the curved surface of the inner cylinder wall of the roller (4), the magnetic system fixing support (5) is fixedly connected with a rack (1), so that the arc magnetic induction surface of the magnetic system is close to the inner cylinder wall of the roller (4), thereby generating an arc magnetic separation layer with a magnetic field in the surface layer space of the outer wall part of the roller (4) close to the arc magnetic induction surface; the feeding device guides the ore slurry to the cambered surface magnetic separation layer; the method is characterized in that:

a concentrate collecting structure layer (7) with a section being a circular ring-shaped cylinder is fixed on the outer wall of the roller (4), a concentrate containing cavity (7-1) is uniformly distributed on the concentrate collecting structure layer (7), an opening of the concentrate containing cavity (7-1) is formed in the surface of the concentrate collecting structure layer (7) to collect and contain ferromagnetic minerals, ore discharge water flushing holes (7-2) are formed between the concentrate containing cavities (7-1) to form an ore discharge water flushing channel, the ferromagnetic minerals contained in the concentrate containing cavity (7-1) and the ore discharge water flushing holes (7-2) are sprayed and flushed through an ore discharge water spraying device to perform ore discharge operation, the concentrate collecting structure layer (7) is made of ferromagnetic materials to intensively constrain the magnetic force lines of the arc magnetic separation layer in the concentrate collecting structure layer (7) corresponding to the concentrate collecting structure layer, and the magnetic field intensity of the concentrate collection structural layer (7) is improved, so that the concentrate magnetic separation rate is improved.

2. The magnetic separator recited in claim 1 wherein: the concentrate collecting structure layer (7) is formed by radially laminating and fixing a plurality of layers of annular grids at intervals, and the grids are formed by alternately fixing metal wires made of ferromagnetic materials; the mesh of the grid meshes which are laminated together form the concentrate containing cavity (7-1); the spacing gaps between the grids form the mine drainage water flushing holes (7-2).

3. A magnetic separator as claimed in claim 1 or claim 2, wherein: the cambered surface magnetic separation layer is positioned above the left side of the outer wall of the roller (4) and gradually increases from left to right, the ore dressing barrel driving device drives the roller (4) to rotate in a direction from the bottom end of the cambered surface magnetic separation layer to the high end, an arc ore slurry separation guide groove (8) is arranged at a position corresponding to the cambered surface magnetic separation layer, the inner side wall of the ore slurry separation guide groove (8) is the concentrate collection structure layer (7), and an ore slurry guide groove (9) communicated with a discharge hole of the feeding device is arranged on the outer side wall of the ore slurry separation guide groove (8); and the ore pulp flows into the ore pulp separation guide groove (8) from a discharge hole of the feeding device through an ore pulp guide groove (9) so that the ore pulp is uniformly distributed on the cambered surface of the concentrate collection structure layer (7).

4. A magnetic separator as claimed in claim 3, wherein: the outer side wall of the ore slurry separation guide groove (8) is also provided with a rinsing water guide groove (10), and the rinsing water guide groove (10) is positioned above the ore slurry guide groove (9).

5. The magnetic separator recited in claim 4 wherein: the width of the arc-shaped ore slurry separation guide groove (8), the width of the ore slurry guide groove (9) and the width of the rinsing water guide groove (10) are matched with the width of the roller (4).

6. The magnetic separator recited in claim 5 wherein: the feeding device comprises an ore pulp separating chamber and a rinsing water chamber (11), the ore pulp separating chamber is provided with a block pulp separating structure and comprises an ore block separating cavity (12) arranged on the left side of the ore pulp separating chamber and an ore pulp cavity (13) arranged on the right side of the ore pulp separating chamber in parallel, the ore block separating cavity (12) and the ore pulp cavity (13) are separated by a partition wall, the partition wall is composed of a partition plate (14) at the lower end and a sieve plate (15) at the upper end, the sieve plate (15) inclines from bottom to right, the upper end of the ore block separating cavity (12) is a feeding hole, a guide plate (16) used for guiding ore pulp to the sieve plate (15) is arranged below the feeding hole, and an ore block outlet (12-1) is arranged at the lower end of the ore block separating cavity (12) so as to guide out ore blocks screened by the sieve plate (15); the lower end of the mineral slurry cavity (13) is provided with a discharge hole of a feeding device communicated with the mineral slurry guide chute (9); the rinsing water chamber (11) is arranged on the right side of the mineral slurry separation chamber, and the lower end of the rinsing water chamber is communicated with the rinsing water diversion trench (10); the width of the feeding device is matched with the width of the roller (4).

7. The magnetic separator recited in claim 6 wherein: an ore-turning water pipe (17) and a dilution water pipe (18) which are communicated with a water source are respectively arranged above the ore pulp separation chamber and the rinsing water chamber (11), the length directions of the ore-turning water pipe (17) and the dilution water pipe (18) are consistent with the length direction of the feeding device, and water outlet holes are uniformly distributed below the ore pulp separation chamber and the rinsing water chamber; the ore discharge water spraying device comprises more than two spraying water pipes, each spraying water pipe comprises a high-pressure water pipe (19), one end of each high-pressure water pipe (19) is provided with a water inlet communicated with a high-pressure water source, and nozzles (19-1) are uniformly distributed on the high-pressure water pipes (19) and used for flushing ferromagnetic mineral substances from the concentrate collecting structural layer (7) and enabling the ferromagnetic mineral substances to fall into a feed inlet of the concentrate collecting box (2); the ore dressing barrel driving device comprises a speed reducing motor (20) and a gear transmission structure (21) in gear transmission connection with the roller (4); the magnet (6) is a permanent magnet.