WO2023070893A1 - 一种干式预选机 - Google Patents

一种干式预选机 Download PDF

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Publication number
WO2023070893A1
WO2023070893A1 PCT/CN2021/138774 CN2021138774W WO2023070893A1 WO 2023070893 A1 WO2023070893 A1 WO 2023070893A1 CN 2021138774 W CN2021138774 W CN 2021138774W WO 2023070893 A1 WO2023070893 A1 WO 2023070893A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
area
eccentric
roller mechanism
materials
Prior art date
Application number
PCT/CN2021/138774
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English (en)
French (fr)
Inventor
张承臣
任晓伟
李恒盛
李朝朋
代丽丽
赵静
Original Assignee
沈阳隆基电磁科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from CN202122568727.8U external-priority patent/CN216173205U/zh
Priority claimed from CN202111241839.0A external-priority patent/CN113798059A/zh
Application filed by 沈阳隆基电磁科技股份有限公司 filed Critical 沈阳隆基电磁科技股份有限公司
Priority to AU2021471055A priority Critical patent/AU2021471055A1/en
Publication of WO2023070893A1 publication Critical patent/WO2023070893A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B03C1/12—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operation; with movable pole pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for

Definitions

  • the present application relates to the technical field of magnetic separation, in particular to a dry pre-selector.
  • the present application proposes a dry pre-separator, aiming at solving the problem of poor sorting effect caused by serious magnetic shielding and magnetic inclusion in existing dry-type magnetic separation equipment.
  • This application proposes a dry pre-selector, which includes: an anti-blow path and an eccentric magnetic roller mechanism; wherein, the eccentric magnetic roller mechanism is partly arranged in the anti-blow path, and It is used to blow back blowing against the direction of material delivery to the surface of the eccentric magnetic roller mechanism.
  • the eccentric magnetic roller mechanism is used to convey materials and also to provide an eccentric rotating magnetic field; above the eccentric magnetic roller mechanism is a Feeding area; under the eccentric magnetic roller mechanism, there are tailings area, medium ore area and concentrate area; under the conveying action of the eccentric magnetic roller mechanism, the materials in the feeding area are transported to the reverse blowing path and carry out tumbling motion, so that the materials are layered on the surface of the eccentric magnetic roller mechanism, so that the strong magnetic materials are arranged in the innermost layer, the weak magnetic materials are arranged in the middle layer, and the non-magnetic materials are arranged in the outermost layer.
  • the non-magnetic material in the outermost layer leaves the surface of the eccentric magnetic roller mechanism under the action of the reverse blowing of the reverse blowing path and enters the tailings area or is blown out with the wind. Under the action of transport and transportation, it enters the middle ore area and the concentrate area in turn.
  • the eccentric magnetic roller mechanism includes: a magnetic roller and an eccentric magnetic system; wherein, the magnetic roller is connected with a cylinder driving member, which is used to drive the magnetic roller to rotate, so as to transport the The material on the surface of the magnetic drum is transported to the reverse blowing path; the eccentric magnetic system is eccentrically arranged inside the magnetic drum, and the surface of the magnetic drum forms a strong magnetic area and a weak magnetic area.
  • the magnetic zone is set at the sorting area of the reverse blowing path, so that the material can be tumbled and sorted non-magnetic material under the action of the magnetic field and wind force; the eccentric magnetic system is rotatably set in the magnetic drum to The material on the surface of the magnetic drum is made to roll under the action of the rotating magnetic field.
  • the eccentric magnetic system is connected with a magnetic system driving member, which is used to drive the eccentric magnetic system to rotate.
  • the magnetic drum is a non-metallic cylinder structure; and/or, the reverse blowing path is a non-metallic air path; and/or, the feeding area is a non-metallic feeding area .
  • the reverse blowing path includes: the air inlet and discharge area, which is arranged on the lower side of the eccentric magnetic roller mechanism; the air outlet and material discharge area, which is arranged on the upper side of the eccentric magnetic roller mechanism ;
  • the sorting area is set between the air inlet and discharge area and the air outlet area.
  • the strong magnetic area of the eccentric magnetic roller mechanism is set at the sorting area of the reverse blowing path, so that the materials can be tumbled and sorted under the action of magnetic field and wind force.
  • a material distribution plate is provided on one side of the reverse blowing path under the eccentric magnetic roller mechanism, and several blanking areas are isolated and formed on the side of the air inlet of the reverse blowing path , used for isolating different magnetic materials; the position of the distribution plate along the horizontal direction is adjustable below the eccentric magnetic roller mechanism, and the distribution plate is a telescopic plate structure for adjusting the height of the upper and lower and distribution location.
  • the side wall of the material distribution plate, the inner wall of the reverse air passage and/or the outer wall of the eccentric magnetic roller mechanism are provided with wear-resistant sheets.
  • the feeding slide plate is provided at the feeding area, which is used for buffering the materials input into the feeding area.
  • the above-mentioned dry pre-selector is provided with cleaning brushes and/or cleaning scrapers located on the outer periphery of the eccentric magnetic roller mechanism on the outside of the reverse blowing path, and is used to adhere to the surface of the eccentric magnetic roller mechanism. Materials are cleaned.
  • the material in the feeding area is transported into the reverse blowing path and undergoes tumbling motion, so that the material is layered on the surface of the eccentric magnetic roller mechanism, making the strong
  • the magnetic materials are arranged in the innermost layer, the weak magnetic materials are arranged in the middle layer, and the non-magnetic materials are arranged in the outermost layer.
  • the non-magnetic fine powder materials in the outermost layer are hard to get out of the machine due to their small particles and small centrifugal force.
  • the material layer is separated in time, and the non-magnetic fine powder material part of the outer layer will be taken up with the reverse blowing under the reverse blowing effect in the reverse blowing path, and most of the fine powder non-magnetic materials will be in the air. Under the action of the wind, it leaves the surface of the eccentric magnetic roller mechanism and is covered in the space of the reverse blowing path.
  • the fine powder non-magnetic materials in the reverse blowing path are either carried away by the wind or fall into the tailings area; most of the non-magnetic
  • the granular material is brought to the tailings area with the rotation of the magnetic drum and the reduction of the magnetic field, the weak magnetic minerals fall to the middle mining area with the rotation of the magnetic drum and the reduction of the magnetic field, and the concentrate falls to the concentrate with the rotation of the magnetic drum and the reduction of the magnetic field zone, so that the ultra-fine materials are classified, efficiently and finely sorted.
  • the dry pre-selector provides a complex separation environment coupled with multiple physical fields for dry magnetic separation of ultra-fine materials, in which the materials are mainly subjected to multiple forces such as gravity, centrifugal force, magnetic reversal force, wind force, and magnetic field suction. , so as to achieve the purpose of classification, high efficiency and fine separation, and solve the traditional dry separation of ultrafine crushed materials such as materials under the sieve of high-pressure roller mills, materials on the sieve of vertical mills and materials under the sieve of hammer crushers.
  • the problem that the sorting index of the machine cannot meet the standard can be achieved, and then the effect of increasing the scrap rate, improving the metal grade and reducing the production cost can be achieved.
  • Fig. 1 is the structural representation of the dry type pre-selector that the embodiment of the present application provides;
  • Fig. 2 is the schematic structural diagram of the principle structure of the dry preselector provided by the embodiment of the present application;
  • Fig. 3 is a front view of the reverse blowing path provided by the embodiment of the present application.
  • Fig. 4 is the sectional view of A-A place in Fig. 3;
  • Fig. 5 is a side view of the eccentric magnetic roller mechanism provided by the embodiment of the present application.
  • Fig. 6 is a front view of the eccentric magnetic roller mechanism provided by the embodiment of the present application.
  • Fig. 7 is the sectional view of B-B place in Fig. 6;
  • Fig. 8 is a side view of the distribution plate provided by the embodiment of the present application.
  • the dry pre-selector includes: the reverse blowing path 1, the eccentric magnetic roller mechanism 2 and the frame body 3; wherein, the frame body 3 plays a supporting role to support the eccentric magnetic roller mechanism 2, the reverse blowing path 1, etc. support.
  • the eccentric magnetic roller mechanism 2 is partly arranged in the reverse blowing path 1, and the reverse blowing path 1 is used to spray reverse blowing to the surface of the eccentric magnetic roller mechanism 2 opposite to the material conveying direction; the eccentric magnetic roller mechanism 2 is used to convey materials, and also to provide eccentric rotating magnetic field.
  • the reverse blowing path 1 can be vertically arranged to provide reverse blowing that blows vertically upward.
  • the eccentric magnetic roller mechanism 2 can be partially arranged in the reverse blowing path 1, and the eccentric magnetic roller mechanism 2 and the reverse blowing path 1 form a sorting area for sorting materials, so as to realize the separation of materials; the eccentric magnetic roller mechanism 2 can make The material is conveyed along the surface of the eccentric magnetic roller mechanism 2, so that the material is conveyed into the reverse blowing path 1.
  • the eccentric magnetic roller mechanism 2 can also provide an eccentric rotating magnetic field, so that the material rolls and the magnetic material can be adsorbed on the eccentric magnetic roller mechanism 2. The surface is transported with the rotating rolling surface of the eccentric magnetic roller mechanism 2, so as to prevent the magnetic material from falling vertically under the action of gravity.
  • the eccentric magnetic roller mechanism 2 can realize the conveying of materials, and can provide rotating magnetic fields with different surface strengths to form weak magnetic regions and strong magnetic regions, so that the materials are located in the reverse blowing path 1 in the eccentric magnetic roller mechanism 2.
  • the inner strong magnetic area is flipped at high speed to achieve stratification. Under the action of the magnetic field, the adsorption of magnetic materials can be realized, and the falling of different magnetic materials can be realized under the action of the change of magnetic field strength, that is, the separation of materials can be realized.
  • the blowing direction provided by the reverse blowing path 1 is opposite to the conveying direction of the material, that is, the blowing direction of the wind is from bottom to top, and the material is conveyed downward under the conveying action of gravity and the eccentric magnetic roller mechanism 2.
  • the wind blowing direction provided can also be an oblique direction, and it only needs to provide a component that is vertically upward, which is opposite to the conveying direction of the material;
  • the metal wind path, that is, the external plate surrounding the anti-blowing path 1 can be non-metallic materials such as glass fiber reinforced plastics, polyvinyl chloride, polyvinyl chloride, etc., so as to avoid the eddy current of the material, thereby avoiding the heating of the anti-blowing path 1;
  • the service life of the blowing path 1, preferably, the inner wall of the reverse blowing path 1 can be provided with a wear-resistant sheet, especially the position in contact with the material.
  • the wear-resistant sheet can be a wear-resistant ceramic sheet or other wear-resistant sheets. It is not limited in any way in the examples.
  • a feeding area 31 above the eccentric magnetic roller mechanism 2 there is a feeding area 31 above the eccentric magnetic roller mechanism 2, and the feeding area 31 can be supported by the frame body 3 for receiving materials so that the materials can be fed automatically under the action of gravity.
  • the zone 31 is conveyed onto the surface of the eccentric magnetic roller mechanism 2 .
  • the feeding area 31 can be set on one side of the air outlet of the reverse blowing path 1 (the right side as shown in Figure 1), so that the material falls to the side of the eccentric magnetic roller mechanism 2 through the feeding area 31 under the action of gravity.
  • the surface is transported into the reverse blowing path 1 under the rolling action of the eccentric magnetic roller mechanism 2, and the feeding area 31 and the reverse blowing path 1 can share the middle partition plate.
  • the feed inlet (upper end as shown in Figure 1) of the feed area 31 can be connected with an external feeder so as to realize the input of materials; for the input of buffer materials, preferably, the feed area 31 is provided with a feeding slide 311, which is used to buffer the materials input in the feeding area 31; the feeding sliding plate 311 can be inclined on the inner wall of the feeding area 31, so as to guide and buffer the materials, so that After buffering, the material falls onto the surface of the eccentric magnetic roller mechanism 2; preferably, the feeding slide 311 is rotatably connected to the inner wall of the feeding area 31 to adjust its buffering angle.
  • the feeding area 31 can be a non-metallic feeding area, that is, the outer plate surrounding the feeding area 31 can be made of glass fiber reinforced plastics, polyvinyl chloride, polychloride Propylene and other non-metallic materials are used to avoid the eddy current of the material, thereby avoiding the heating of the feeding area 31; in order to improve the service life of the feeding area 31, preferably, the inner wall of the feeding area 31 can be provided with a wear-resistant sheet, especially At the position in contact with the material, the wear-resistant sheet can be a wear-resistant ceramic sheet or other wear-resistant sheets, which are not limited in this embodiment.
  • tailings area 32, medium ore area 33 and concentrate area 34 under the eccentric magnetic roller mechanism 2 there are tailings area 32, medium ore area 33 and concentrate area 34 under the eccentric magnetic roller mechanism 2, and the three can be supported by the frame body 3 so that the non-magnetic materials in the material can be used as tailings Output from the tailings area 32, the weak magnetic material is output from the middle ore area 33 as the medium ore, and the strong magnetic material is output from the concentrate area 34 as the concentrate; meanwhile, the tailings area 32 is also arranged under the reverse blowing road 1, so that the reverse blowing road The tailings dropped in 1 also fall into the tailings area 32 for collection.
  • the tailings area 32, the middle ore area 33 and the concentrate area 34 can be arranged sequentially from left to right.
  • the strength of the magnetic field above the zone 34 can be reduced sequentially, so that the weak magnetic material and the strong magnetic material fall into the middle ore zone 33 and the concentrated ore zone 34 in sequence.
  • the non-magnetic fine powder material part of the outer layer will be carried up with the high-speed wind Movement, most of the fine powdery non-magnetic materials will leave the surface of the eccentric magnetic roller mechanism 2 under the action of the wind, and fill the space of the air path.
  • the fine powder non-magnetic materials in the air path are partly taken away by the wind, and partly Fall into the tailings area 32; Most of the non-magnetic granular materials are brought to the tailings area 32 with the rotation of the eccentric magnetic roller mechanism 2 and the reduction of the magnetic field.
  • the strong magnetic material namely the concentrated ore
  • the triangle mark in the material indicates non-magnetic material
  • the circle mark indicates medium magnetic material (weak magnetic material)
  • the square mark indicates magnetic material (strong magnetic material).
  • a cleaning brush 4 and/or a cleaning scraper 5 positioned at the outer periphery of the eccentric magnetic roller mechanism 2 on the outside of the reverse blowing path 1, which is used to clean the material attached to the surface of the eccentric magnetic roller mechanism 2. clean up.
  • the cleaning brush 4 and/or the cleaning scraper 5 can be supported on the frame body 3 by a support frame, and the cleaning brush 4 and the cleaning scraper 5 can be arranged in the weak magnetic field area of the eccentric magnetic roller mechanism 2, so that After the materials are sorted, the materials attached to the surface of the eccentric magnetic roller mechanism 2 are cleaned; In the magnetic field weakening area, and the cleaning scraper 5 is arranged under the cleaning brush 4, so as to scrape the material first and then clean it, thereby ensuring the effect of material cleaning.
  • the gap between the cleaning brush 4 and the cleaning scraper 5 and the eccentric magnetic roller mechanism 2 is adjustable, for example, the cleaning brush 4 and the cleaning scraper 5 can be connected to the support frame through a telescopic plate , to clean a small amount of material attached to the surface of the eccentric magnetic roller mechanism 2.
  • the material of the cleaning brush 4 can be nylon, and the material of the cleaning blade 5 can be rubber.
  • a material passing gap 6 is provided between the eccentric magnetic roller mechanism 2 and the reverse blowing path 1
  • a material passing gap 6 is provided between the eccentric magnetic roller mechanism 2 and the reverse blowing path 1
  • Weak magnetic materials and strong magnetic materials leave the reverse blowing path 1 under the magnetic field and conveying action of the eccentric magnetic roller mechanism 2, and under the magnetic field and conveying action of the eccentric magnetic roller mechanism 2 and the action of gravity, the nonmagnetic materials, weak magnetic materials and The strong magnetic material enters the tailings area 32 , the middle ore area 33 and the concentrate area 34 in sequence.
  • the side (the right side as shown in Fig. 1) of the anti-blow path 1 is provided with a distribution plate 7 under the eccentric magnetic roller mechanism 2,
  • One side of the air inlet of Road 1 (the lower end as shown in Figure 1) is isolated to form several feeding areas for isolating different magnetic materials.
  • the material distribution plate 7 can be arranged on the frame body 3, so that the right side of the reverse blowing path 1 is partitioned below the eccentric magnetic roller mechanism 2; in this embodiment, there are two material distribution plates 7, side by side And set at intervals to isolate three feeding areas, which correspond to the tailings area 32, the middle ore area 33, and the concentrate area 34, respectively, so as to transport the isolated materials with different magnetic properties to the tailings area respectively 32.
  • the material distribution plate 7 is used to isolate materials with different magnetic properties; of course, the number of material distribution plates 7 can also be other numbers such as one or more.
  • the distributing plate 7 is adjustable in the horizontal direction (relative to the position shown in Figure 1) on the frame body 3 below the eccentric magnetic roller mechanism 2 to adjust The position is isolated in the horizontal direction; of course, the material distribution plate 7 can also be a telescopic plate structure, which is used to adjust the height up and down, and adjust the size of the gap between the material distribution plate 7 and the eccentric magnetic roller mechanism 2 .
  • the side wall of the material distribution plate 7 can be provided with a wear-resistant sheet, especially at the position in contact with the material.
  • the wear-resistant sheet can be a wear-resistant ceramic sheet or other The wear-resistant sheet is not limited in this embodiment.
  • the reverse blowing path 1 includes: an air inlet and discharge area 11, an air outlet and discharge area 12, and a sorting area 13; wherein, the air inlet and discharge area 11 is set on the lower side of the eccentric magnetic roller mechanism 2; The air outlet and discharge area 12 is arranged on the upper side of the eccentric magnetic roller mechanism 2 ; the sorting area 13 is arranged between the air inlet and discharge area 11 and the air outlet and discharge area 12 .
  • an exhaust fan can be connected to the air outlet and discharge area 12, and the high-speed wind enters the sorting area 13 from the air inlet and discharge area 11, and some materials, especially non-magnetic materials, are brought by the wind to the air outlet.
  • the material area 12 is used to discharge the dry pre-selector; in order to avoid air pollution by the gas carrying materials discharged from the air inlet and discharge area 11, the air outlet area 12 can be connected with a dust collector so that the air with materials can pass through After being filtered by the dust collector, it is discharged into the atmosphere, and the material is collected by the dust collector.
  • the eccentric magnetic roller mechanism 2 includes: a magnetic roller 21 and an eccentric magnetic system 22; wherein, the magnetic roller 21 is connected with a cylinder driver 23 for driving the magnetic roller 21 to rotate, so as to Convey the material on the surface of the magnetic drum 21, so that the material is transported to the reverse blowing path 1; the eccentric magnetic system 22 is eccentrically arranged inside the magnetic drum 21, and the surface of the magnetic drum 21 forms a strong magnetic area and a weak magnetic area, and the strong magnetic area is set in the reverse blowing path 1 in the sorting area 13, so that the material is tumbling under the action of the magnetic field and wind force and the sorting of the non-magnetic material; the eccentric magnetic system 22 is rotatably arranged in the magnetic drum 21, so that the material on the surface of the magnetic drum 21 is in the The tumbling motion is performed under the action of a rotating magnetic field.
  • the magnetic drum 21 can be a cylindrical structure.
  • the magnetic drum 21 can be a non-metallic cylinder, and its material can be non-metallic materials such as glass fiber reinforced plastics, polyvinyl chloride, polypropylene chloride, etc.
  • the outer wall of the magnetic drum 21 can be provided with a wear-resistant sheet, especially the position in contact with the material, wear-resistant The sheet may be a wear-resistant ceramic sheet or other wear-resistant sheets, which are not limited in this embodiment.
  • the magnetic drum 21 can be connected with a cylinder driving member 23, which is used to drive the magnetic drum 21 to rotate, so as to transport the material on the surface of the magnetic drum 21, so that the material is transported to the reverse blowing path 1; in this embodiment, as shown in Figure 2 Shown, the magnetic cylinder 21 rotates counterclockwise, so that it is transported counterclockwise along the upper outer wall to the reverse blowing path 1 on the left side of the magnetic cylinder 21; of course, if the reverse blowing path 1 is located on the right side of the magnetic cylinder 21, the magnetic cylinder 21 can be Rotate clockwise so that the material falls clockwise to be transported to the reverse blowing path on the right for sorting; wherein, the cylinder driving part 23 can be a cylinder geared motor, and the cylinder driving part 23 can pass through the sprocket
  • the transmission mechanism 25 is connected with the magnetic cylinder 21; the rotational speed range of the cylinder driving member 23 is adjustable from 0 to 200 r/min.
  • the eccentric arrangement between the eccentric magnetic system 22 and the magnetic cylinder 21, that is to say, the two are not coaxially arranged, so that the outer surface of the magnetic cylinder 21 can form a strong magnetic area and a weak magnetic field.
  • the axis of the eccentric magnetic system 22 and the magnetic drum 21 can be on the same horizontal line, so that the upper part can be transported with the magnetic drum 21, and the weak magnetic material and the strong magnetic material During the counterclockwise rotation of the material, the material falls sequentially; among them, the strong magnetic area can be set at the sorting area 13 of the reverse blowing path 1, so that the material can be sorted under the action of the magnetic field and wind force, so that the material can be stratified and non-magnetic Separation between materials and magnetic materials; in the present embodiment, the position where the gap between the eccentric magnetic system 22 and the magnetic drum 21 is small is a strong magnetic area, as shown in Figure 2, the left end of the eccentric magnetic system 22 and the magnetic drum 21 If the gap is small, the left end of the eccentric magnetic system 22 and its adjacent positions are strong magnetic areas, and other positions can be weak magnetic areas; in this embodiment, the eccentricity of the two can be determined according to actual conditions.
  • the eccentric magnetic system 22 is rotatably arranged in the magnetic drum 21, so as to provide a rotating magnetic field, so that the material can be turned over, especially, the material can be turned over at a high speed in the strong magnetic area to realize the stratification of different materials; in this implementation
  • the rotation direction between the eccentric magnetic system 22 and the magnetic drum 21 is opposite, and the eccentric magnetic system 22 can rotate clockwise, which can increase the relative rotational speed between the two and improve the effect of material stratification.
  • the eccentric magnetic system 22 may be connected with a magnetic system driving member 24 for driving the eccentric magnetic system 22 to rotate.
  • the eccentric magnetic system 22 can be a 360-degree all-magnetic structure with N-S alternate arrangement;
  • the magnetic system driving part 24 can be a 6-pole motor, which drives the eccentric magnetic system 22 to rotate at high speed, and the speed range is adjustable from 0-1000r/min.
  • the material distribution plate 7 includes: a lower fixing plate 71 and an upper adjusting plate 72; wherein, the upper adjusting plate 72 is adjustablely connected to the top of the upper fixing plate 71 along the height direction, and the lower fixing plate 71 and A locking member 73 is provided between the upper adjusting plate 72 for locking the lower fixing plate 71 and the upper adjusting plate 72 when the upper adjusting plate 72 is adjusted in place.
  • the lower fixing plate 71 can be fixed on the frame body 3 by bolts, and the upper adjusting plate 72 can be vertically arranged on the left side of the lower fixing plate 71 and slidably pressed against the left side wall of the lower fixing plate 71 to be fixed on the lower side.
  • the locking member 73 can be a bolt assembly, so that when the upper adjusting plate 72 is adjusted in place, it is passed through the lower fixing plate 71 and the upper adjusting plate 72, so that the upper adjusting plate 72 is fixed to the lower fixing plate 71, forming a telescopic plate structure.
  • the feeding area 31 receives materials, the materials are buffered by the feeding slide 311 from the feeding area 31 and then fall onto the surface of the magnetic drum 21, and the magnetic drum 21 rotates counterclockwise to take the materials through the feeding
  • the gap 6 enters the sorting area 13.
  • the material when the material is in contact with the magnetic field, the material performs a high-speed tumbling motion under the high-speed rotation of the eccentric magnetic system 22 of the N-S alternating magnetic field.
  • the material When the material is tumbling, the material will automatically stratify on the surface of the magnetic drum 21
  • the strong magnetic materials are arranged in the innermost layer, the weak magnetic materials are arranged in the middle layer, and the non-magnetic materials are arranged in the outermost layer; the non-magnetic fine powder materials in the outermost layer are small in size and subjected to small centrifugal force, so it is difficult to Separated from the material layer in time, but the high-speed wind enters the sorting area 13 from the air inlet and discharge area 11 of the reverse blowing path 1, and the non-magnetic fine powder material part of the outer layer will be brought up with the high-speed wind, and most of the The fine powdery non-magnetic material will leave the surface of the magnetic drum 21 under the action of the wind, and it will be filled in the space of the reverse blowing path 1, and the fine powdery non-magnetic material in the reverse blowing path 1 will either be taken to the dust collector Collected in the container, or fall into the tailings area 32
  • the material in the feeding area 31 is transported into the reverse blowing path 1 and performs tumbling motion, so that the material is transported in the eccentric magnetic roller mechanism 2.
  • the surface of 2 is layered, so that the strong magnetic materials are arranged in the innermost layer, the weak magnetic materials are arranged in the middle layer, and the non-magnetic materials are arranged in the outermost layer.
  • the outermost non-magnetic fine powder materials are small in size, so the Due to the small centrifugal force, it is difficult to separate from the material layer in time.
  • the non-magnetic fine powder material part of the outer layer will be taken up with the reverse blowing under the reverse blowing effect in the reverse blowing path 1, and the large Part of the fine powdery non-magnetic material will leave the surface of the eccentric magnetic roller mechanism 2 under the action of the wind, and it will be filled in the space of the reverse blowing path 1, and the fine powdery non-magnetic material in the reverse blowing path 1 will either be taken away by the wind to, or fall into the tailings area 32; most of the non-magnetic granular materials are brought to the tailings area 32 as the magnetic drum 21 rotates and the magnetic field decreases, and the weakly magnetic minerals fall to the middle mine area as the magnetic drum 21 rotates and the magnetic field decreases 33.
  • the concentrate falls to the concentrate area 33 with the rotation of the magnetic drum 21 and the reduction of the magnetic field, so that the ultra-fine crushed materials are classified, efficiently and finely separated.
  • the dry pre-selector provides a complex separation environment coupled with multiple physical fields for dry magnetic separation of ultra-fine materials, in which the materials are mainly subjected to multiple forces such as gravity, centrifugal force, magnetic reversal force, wind force, and magnetic field suction. , so as to achieve the purpose of classification, high efficiency and fine separation, and solve the traditional dry separation of ultrafine crushed materials such as materials under the sieve of high-pressure roller mills, materials on the sieve of vertical mills and materials under the sieve of hammer crushers.
  • the problem that the sorting index of the machine cannot meet the standard can be achieved, and then the effect of increasing the scrap rate, improving the metal grade and reducing the production cost can be achieved.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection or an integral connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components.
  • installation should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection or an integral connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components.

Abstract

本申请提供了一种干式预选机，该干式预选机包括：反吹风路和偏心磁滚机构；其中，偏心磁滚机构部分设置在反吹风路内，用于输送物料，还用于提供偏心旋转磁场；偏心磁滚机构的上方设有入料区；偏心磁滚机构的下方设置有尾矿区、中矿区和精矿区。本申请中入料区的物料输送至反吹风路内并进行翻滚运动，使得强磁性物料排布在最里层，弱磁性物料排布在中层，非磁性物料排布在最外层，在反吹风路内的反吹风作用下使得外层的非磁性细粉状物料离开偏心磁滚机构表面被风带走到或落入尾矿区；弱磁性矿物随着磁滚筒旋转和磁场降低而落到中矿区，精矿随着磁滚筒旋转和磁场降低而落到精矿区，从而超细碎的物料得到了分级式、高效、精细的分选。

Description

一种干式预选机
相关申请的交叉引用
本申请要求于2021年10月25日提交中国国家知识产权局的申请号为202111241839.0、名称为“一种干式预选机”以及于2021年10月25日提交中国国家知识产权局的申请号为202122568727.8、名称为“一种干式预选机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及磁选技术领域，具体而言，涉及一种干式预选机。
背景技术
随着我国经济的持续快速发展，原材料的需求量持续居高不下，铁矿石作为钢铁行业主要原材料之一，其选矿工艺经过多年来的工艺和设备的不断创新换代，而得到了长远的进步。比如近些年来高压辊磨机、立式磨机、新型锤式破碎机等超细碎破碎设备在铁矿选矿工艺上得到大规模应用，大大消减了企业的生产成本。
然而铁矿工艺设备的创新大多是破碎和磨矿设备，对于铁矿工艺流程中磁分选设备一般还是采用传统的磁选设备，分选效果差强人意。尤其是传统的干式磁选设备在面对新型超细碎设备破碎后的物料时，由于分选的物料更细，磁屏蔽和磁夹杂现象更为严重，所以分选效果差。
发明内容
鉴于此，本申请提出了一种干式预选机，旨在解决现有干式磁选设备磁屏蔽和磁夹杂现象严重导致分选效果差的问题。
本申请提出了一种干式预选机，该干式预选机包括：反吹风路和偏心磁滚机构；其中，所述偏心磁滚机构部分设置在所述反吹风路内，所述反吹风路用于向所述偏心磁滚机构表面喷吹与物料输送方向相反的反吹风，所述偏心磁滚机构用于输送物料，还用于提供偏心旋转磁场；所述偏心磁滚机构的上方设有入料区；所述偏心磁滚机构的下方设置有尾矿区、中矿区和精矿区；在所述偏心磁滚机构的输送作用下，所述入料区的物料输送至所述反吹风路内并进行翻滚运动，以使物料在所述偏心磁滚机构的表面分层，使得强磁性物料排布在最里层，弱磁性物料排布在中层，非磁性物料排布在最外层，最外层的非磁性物料在反吹风路的反吹风的作用下离开所述偏心磁滚机构的表面进入尾矿区或随风吹出，弱磁性物料和强磁性物料在所述偏心磁滚机构的磁场和输送作用下依次进入中矿区和精矿区。
进一步地，上述干式预选机，所述偏心磁滚机构包括：磁滚筒和偏心磁系；其中，所述磁滚筒连接有筒体驱动件，用于驱动所述磁滚筒进行转动，以输送所述磁滚筒表面的物料，以使物料输送至所述反吹风路内；所述偏心磁系偏心设置在所述磁滚筒的内部，所述 磁滚筒的表面形成强磁区和弱磁区，所述强磁区设置在所述反吹风路的分选区处，以使物料在磁场和风力作用下进行物料翻滚和非磁性物料的分选；所述偏心磁系可转动地设置在所述磁滚筒内，以使所述磁滚筒表面的物料在旋转的磁场作用下进行翻滚运动。
进一步地，上述干式预选机，所述偏心磁系连接有磁系驱动件，用于驱动所述偏心磁系转动。
进一步地，上述干式预选机，所述磁滚筒为非金属筒体结构；和/或，所述反吹风路为非金属风路；和/或，所述入料区为非金属入料区。
进一步地，上述干式预选机，所述反吹风路包括：进风排料区，设置所述偏心磁滚机构的下侧；出风出料区，设置在所述偏心磁滚机构的上侧；分选区，设置在所述进风排料区和所述出风出料区之间。
进一步地，上述干式预选机，所述偏心磁滚机构的强磁区设置在所述反吹风路的分选区处，以使物料在磁场和风力作用下进行翻滚和物料分选。
进一步地，上述干式预选机，所述偏心磁滚机构的下方在所述反吹风路的一侧设有分料板，在所述反吹风路的进风口一侧隔离形成若干个下料区，用于进行不同磁性物料的隔离；所述分料板沿水平方向位置可调地设置在所述偏心磁滚机构的下方，并且，所述分料板为伸缩板结构，用于调节上下高度和分料位置。
进一步地，上述干式预选机，所述分料板的侧壁、所述反吹风路的内壁和/或所述偏心磁滚机构的外壁设有耐磨片。
进一步地，上述干式预选机，所述入料区处设有入料溜板，用于对所述入料区输入的物料进行缓冲。
进一步地，上述干式预选机，在所述反吹风路的外部设有位于所述偏心磁滚机构外周的清扫毛刷和/或清扫刮板，用于对所述偏心磁滚机构表面附着的物料进行清扫。
本申请提供的干式预选机，在偏心磁滚机构的输送作用下，入料区的物料输送至反吹风路内并进行翻滚运动，以使物料在偏心磁滚机构的表面分层，使得强磁性物料排布在最里层，弱磁性物料排布在中层，非磁性物料排布在最外层，最外层的非磁性细粉状物料由于颗粒小，所受的离心力小，很难从料层中及时分离开，可在反吹风路内的反吹风作用下使得外层的非磁性细粉状物料部分会随着反吹风被带起，并且，大部分细粉状非磁性物料会在风的作用下离开偏心磁滚机构表面，并且在反吹风路的空间内布满，反吹风路里的细粉状非磁性物料要么被风带走到，要么落入尾矿区；大部分非磁性颗粒状物料随着磁滚筒旋转和磁场降低而被带到尾矿区，弱磁性矿物随着磁滚筒旋转和磁场降低而落到中矿区，精矿随着磁滚筒旋转和磁场降低而落到精矿区，从而超细碎的物料得到了分级式、高效、精细的分选。
该干式预选机提供了一个多物理场耦合的复杂分选环境进行超细碎物料的干式磁力分选，物料在其中主要受重力、离心力、磁翻转力、风力、磁场吸力等多力复合作用，从而达到分级式、高效、精细分选的目的，解决了高压辊磨机筛下的物料、立式磨机筛上的物料和锤式破碎机筛下的物料等超细碎物料的传统干选机的分选指标无法达标的问题，进而能够达到增大抛废率和提高金属品位、降低生产成本的效果。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为本申请实施例提供的干式预选机的结构示意图；
图2为本申请实施例提供的干式预选机的原理结构示意图；
图3为本申请实施例提供的反吹风路的主视图；
图4为图3中A-A处的剖面图；
图5为本申请实施例提供的偏心磁滚机构的侧视图；
图6为本申请实施例提供的偏心磁滚机构的主视图；
图7为图6中B-B处的剖面图；
图8为本申请实施例提供的分料板的侧视图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
参见图1至图2，其示出了本申请实施例提供的干式预选机的结构示意图。如图所示，该干式预选机包括：反吹风路1和偏心磁滚机构2和架体3；其中，架体3起到支撑作用，以对偏心磁滚机构2、反吹风路1等进行支撑。
继续参见图1和图2，偏心磁滚机构2部分设置在反吹风路1内，反吹风路1用于向偏心磁滚机构2表面喷吹与物料输送方向相反的反吹风；偏心磁滚机构2用于输送物料，还用于提供偏心旋转磁场。具体地，反吹风路1可以竖直设置，以提供竖直向上喷吹的反吹风。偏心磁滚机构2可部分设置在反吹风路1内，偏心磁滚机构2和反吹风路1组成一个用于分选物料的分选区域，以实现物料的分离；偏心磁滚机构2可使得物料沿偏心磁滚机构2的表面进行输送，使得物料输送至反吹风路1内，偏心磁滚机构2还可提供偏心旋转 磁场，使得物料翻滚并可将磁性物料吸附在偏心磁滚机构2的表面以随偏心磁滚机构2的旋转滚动表面进行输送，避免磁性物料在重力的作用下垂直下落。在本实施例中，偏心磁滚机构2可实现物料的输送，并可提供表面强度不一的旋转磁场即可形成弱磁区和强磁区，以使物料在偏心磁滚机构2位于反吹风路1内的强磁区处进行高速翻转以实现分层，在磁场的作用下可实现磁性物料的吸附，并磁场强度变化作用下实现不同磁性物料的分别下落，即实现物料的分选。其中，反吹风路1提供的风吹方向与物料的输送方向相反，即风吹方向为自下至上，而物料在重力和偏心磁滚机构2的输送作用下向下输送，当然，反吹风路1提供的风吹方向亦可为倾斜方向，只需提供有竖直向上即与物料的输送方向相反的分量即可；为避免反吹风路1使用过程中的发热，反吹风路1可以为非金属风路，即围设形成反吹风路1的外部板材可以为玻璃钢、聚氯乙烯、聚氯丙烯等非金属材料，以避免物料产生涡流，进而可避免反吹风路1的发热；为提高反吹风路1的使用寿命，优选地，反吹风路1的内壁可设有耐磨片，尤其是与物料接触的位置，耐磨片可以为耐磨陶瓷片，亦可为其他耐磨片，本实施例中对其不做任何限定。
继续参见图1和图2，偏心磁滚机构2的上方设有入料区31，入料区31可以通过架体3进行支撑，用于接收物料，以使物料在重力的作用下自入料区31输送至偏心磁滚机构2的表面上。具体地，入料区31可设置在反吹风路1出风口的一侧(如图1所示的右侧)，以便物料经过入料区31在重力的作用下下落至偏心磁滚机构2的表面，在偏心磁滚机构2的滚动作用下输送至反吹风路1内，并且，入料区31和反吹风路1可共用中间间隔板。在本实施例中，入料区31的入料口(如图1所示的上端)可与外部给料机相连接，以便实现物料的输入；为缓冲物料的输入，优选地，入料区31处设有入料溜板311，用于对入料区31输入的物料进行缓冲；该入料溜板311可以倾斜设置在入料区31的内壁上，以便对物料进行导向和缓冲，使得物料缓冲后落入偏心磁滚机构2的表面；优选地，入料溜板311可转动地连接在入料区31的内壁上，以调节其缓冲角度。其中，为避免入料区31使用过程中的发热，优选地，入料区31可以为非金属入料区，即围设形成入料区31的外部板材可以为玻璃钢、聚氯乙烯、聚氯丙烯等非金属材料，以避免物料产生涡流，进而可避免入料区31的发热；为提高入料区31的使用寿命，优选地，入料区31的内壁可设有耐磨片，尤其是与物料接触的位置，耐磨片可以为耐磨陶瓷片，亦可为其他耐磨片，本实施例中对其不做任何限定。
继续参见图1和图2，偏心磁滚机构2的下方设有尾矿区32、中矿区33和精矿区34，三者可通过架体3进行支撑，以便物料中的非磁性物料作为尾矿自尾矿区32输出，弱磁性物料作为中矿自中矿区33输出，强磁性物料作为精矿自精矿区34输出；同时，尾矿区32亦设置在反吹风路1的下方，以便反吹风路1中掉落的尾矿亦掉落至尾矿区32内，实现收 集。具体地，尾矿区32、中矿区33和精矿区34可自左至右依次排布，尾矿区32的排布位置与反吹风路1的位置相适配，可设置在反吹风路1的正下方，以便接收反吹风路1的反吹风吹出的非磁性物料；中矿区33和精矿区34排布位置与偏心磁滚机构2的磁场强度分布相适配，即中矿区33和精矿区34上方的磁场强度可依次减小，以便弱磁性物料和强磁性物料依次掉落至中矿区33和精矿区34中。
继续参见图2，在偏心磁滚机构2的输送作用下，入料区31的物料输送至反吹风路1内并进行翻滚运动；当物料翻滚时，物料会自行在偏心磁滚机构2的表面分层，使得强磁性物料排布在最里层，弱磁性物料排布在中层，非磁性物料排布在最外层；最外层的非磁性细粉状物料由于颗粒小，所受的离心力小，很难从料层中及时分离开，故在反吹风路1中的反向高速风即反吹风的作用下，外层的非磁性细粉状物料部分会随着高速风被带起向上运动，大部分细粉状非磁性物料会在风的作用下离开偏心磁滚机构2表面，在风路的空间内布满，风路里的细粉状非磁性物料部分被风带走，部分落入尾矿区32；大部分非磁性颗粒状物料随着偏心磁滚机构2旋转和磁场降低而被带到尾矿区32，弱磁性物料即弱磁性矿物随着偏心磁滚机构2旋转和磁场降低而落到中矿区33，强磁性物料即精矿随着偏心磁滚机构2旋转和磁场降低而落到精矿区34，从而超细碎的物料得到了分级式、高效、精细的分选。如图2所示，其中物料中三角形标识表示非磁性物料，圆形标识表示中磁性物料即弱磁性物料，方形标识表示磁性物料即强磁性物料。
继续参见图1和图2，在反吹风路1的外部设有位于偏心磁滚机构2外周的清扫毛刷4和/或清扫刮板5，用于对偏心磁滚机构2表面附着的物料进行清扫。具体地，清扫毛刷4和/或清扫刮板5可以通过支撑架支撑在架体3上，该清扫毛刷4和清扫刮板5可设置于偏心磁滚机构2的弱磁场区域，以便在物料分选后对偏心磁滚机构2表面附着的物料进行清扫；在本实施例中，偏心磁滚机构2以逆时针进行物料输送时，清扫毛刷4和清扫刮板5设置在右侧的弱磁区，并且，清扫刮板5设置在清扫毛刷4的下方，以便先进行刮料再进行清刷，进而确保物料清扫的效果。为便于调节清扫的间隙，优选地，清扫毛刷4和清扫刮板5与偏心磁滚机构2的间隙可调，例如，清扫毛刷4和清扫刮板5可通过伸缩板连接在支撑架上，以清扫偏心磁滚机构2表面附着的少量物料。在本实施例中，清扫毛刷4材质可以为尼龙，清扫刮板5材质可以为橡胶。
在本实施例中，如图1和图2所示，为实现物料自反吹风路1中输出和输入，优选地，偏心磁滚机构2与反吹风路1之间设有过料间隙6，以使物料沿偏心磁滚机构2的表面输送至反吹风路1内或反吹风路1外，以便入料区31的物料输送至反吹风路1内，并进行翻滚运动，部分非磁性物料、弱磁性物料和强磁性物料在偏心磁滚机构2的磁场和输送作用下离开反吹风路1，并在偏心磁滚机构2的磁场和输送作用下以及重力作用，非磁性物料、 弱磁性物料和强磁性物料依次进入尾矿区32、中矿区33和精矿区34。
在本实施例中，如图1和图2所示，偏心磁滚机构2的下方在反吹风路1的一侧(如图1所示的右侧)设有分料板7，在反吹风路1的进风口(如图1所示的下端)一侧隔离形成若干个下料区，用于进行不同磁性物料的隔离。具体地，分料板7可设置在架体3上，以便在反吹风路1的右侧于偏心磁滚机构2的下方进行分区；在本实施例中，分料板7为两个、并排且间隔设置，以便隔离出三个下料区，三个下料区分别与尾矿区32、中矿区33、精矿区34相对应，以分别将隔离出的不同磁性的物料分别输送至尾矿区32、中矿区33、精矿区34内，通过分料板7起到隔离不同磁性的物料作用；当然，分料板7亦可为其他数量例如一个或多个。为便于调节分料位置，优选地，分料板7沿水平方向(相对于图1所示的位置而言)位置可调地设置在偏心磁滚机构2的下方的架体3上，以调节水平方向上隔离位置；当然，分料板7还可以为伸缩板结构，用于调节上下高度，调节分料板7与偏心磁滚机构2之间的缝隙大小。为提高分料板7的使用寿命，优选地，分料板7的侧壁上可设有耐磨片，尤其是与物料接触的位置，耐磨片可以为耐磨陶瓷片，亦可为其他耐磨片，本实施例中对其不做任何限定。
继续参见图2至图4，反吹风路1包括：进风排料区11、出风出料区12和分选区13；其中，进风排料区11设置偏心磁滚机构2的下侧；出风出料区12设置在偏心磁滚机构2的上侧；分选区13设置在进风排料区11和出风出料区12之间。具体地，如图4所示，自下至上依次为进风排料区11、分选区13和出风出料区12；进风排料区11可连接有吹风机，以向进风排料区11吹入自下向上流动的反吹风，该反吹风可以为高速风，以确保吹动非磁性物料的效果；其中，偏心磁滚机构2部分设置在分选区13内，以便在分选区13处进行物料的分选，使得磁性物料和非磁性物料进行分离。为确保风向自下至上流动，优选地，出风出料区12可连接有抽风机，高速风由进风排料区11进入分选区13，部分物料尤其是非磁性物料被风带到出风出料区12处，以排出该干式预选机；为避免进风排料区11排出的携带有物料的气体污染空气，出风出料区12可连接有收尘器，以便带料的风经过收尘器过滤后排入大气中，物料通过收尘器收集起来。
继续参见图2、图5至图7，偏心磁滚机构2包括：磁滚筒21和偏心磁系22；其中，磁滚筒21连接有筒体驱动件23，用于驱动磁滚筒21进行转动，以输送磁滚筒21表面的物料，使得物料输送至反吹风路1内；偏心磁系22偏心设置在磁滚筒21的内部，磁滚筒21的表面形成强磁区和弱磁区，强磁区设置在反吹风路1的分选区13处，以使物料在磁场和风力作用下进行物料翻滚和非磁性物料的分选；偏心磁系22可转动地设置在磁滚筒21内，以使磁滚筒21表面的物料在旋转的磁场作用下进行翻滚运动。
具体地，磁滚筒21可以为圆筒结构，为避免磁滚筒21使用过程中的发热，磁滚筒21 可以为非金属筒体，其材质可以为玻璃钢、聚氯乙烯、聚氯丙烯等非金属材料，以避免物料产生涡流，进而可避免磁滚筒21的发热；为提高磁滚筒211的使用寿命，优选地，磁滚筒21的外壁可设有耐磨片，尤其是与物料接触的位置，耐磨片可以为耐磨陶瓷片，亦可为其他耐磨片，本实施例中对其不做任何限定。磁滚筒21可连接有筒体驱动件23，用于驱动磁滚筒21进行转动，以输送磁滚筒21表面的物料，进而使得物料输送至反吹风路1内；本实施例中，如图2所示，磁滚筒21逆时针转动，以使沿上方外壁逆时针输送至磁滚筒21左侧的反吹风路1内；当然，如果反吹风路1位于磁滚筒21的右侧，磁滚筒21可顺时针转动，以使物料顺时针向下下落以输送至右侧的反吹风路内进行分选；其中，筒体驱动件23可以为筒体减速电机，并且，筒体驱动件23可通过链轮传动机构25与磁滚筒21相连接；筒体驱动件23转速范围为0-200r/min可调。
继续参见图2、图5至图7，偏心磁系22与磁滚筒21之间偏心设置，也就是说，两者并不同轴设置，以使磁滚筒21的外表面可形成强磁区和弱磁区；为使得磁场上下对称设置，偏心磁系22与磁滚筒21的轴线可在同一水平线上，以便在上部随磁滚筒21进行输送，在下部随着磁场的减弱，弱磁性物料和强磁性物料在物料逆时针转动过程中依次下落；其中，强磁区可设置在反吹风路1的分选区13处，以使物料在磁场和风力作用下进行物料分选，使得物料分层并可实现非磁性物料和磁性物料之间的分离；在本实施例中，偏心磁系22和磁滚筒21之间间隙较小的位置为强磁区，如图2所示，偏心磁系22和磁滚筒21的左端的间隙较小，则使得偏心磁系22的左端及其紧邻位置为强磁区，其他位置可为弱磁区；在本实施例中，两者的偏心量可以根据实际情况确定，本实施例中对其不做任何限定。偏心磁系22可转动地设置在磁滚筒21内，以便提供一个旋转磁场，以使物料可进行翻转运动，尤其是，物料可在强磁区进行高速翻转，实现不同物料的分层；在本实施例中，偏心磁系22与磁滚筒21之间的转动方向相反，偏心磁系22可顺时针转动，可使得两者之间相对转动速度增大，提高物料分层效果。为实现偏心磁系22的旋转，优选地，偏心磁系22可连接有磁系驱动件24，用于驱动偏心磁系22转动。其中，偏心磁系22可以为N-S交替排布的360度全磁结构；磁系驱动件24可以为6极电机，驱动偏心磁系22高速旋转，转速范围为0-1000r/min可调。
在本实施例中，磁滚筒21和入料区31的底端之间设有缝隙，其可以为2mm，以便于磁滚筒21可以自由转动，进而实现物料的输送，使得物料随磁滚筒21同步逆时针转动。
参见图8，其为本申请实施例提供的分料板的结构示意图。如图所示，分料板7包括：下固定板71和上调节板72；其中，上调节板72沿高度方向位置可调地连接在上固定板71的顶部，并且，下固定板71和上调节板72之间设有锁紧件73，用于在上调节板72调节到位时锁紧下固定板71和上调节板72。具体地，下固定板71可通过螺栓固定在架体3上， 上调节板72可竖直设置在下固定板71的左侧且沿下固定板71的左侧壁可滑动地抵压接触在下固定板71的左侧壁上；锁紧件73可以为螺栓组件，以便在上调节板72调节到位时，穿设于下固定板71和上调节板72，使得上调节板72固定至下固定板71上，形成伸缩板结构。
该干式预选机的工作过程：入料区31接收物料，物料由入料区31经过入料溜板311缓冲后落入磁滚筒21的表面，磁滚筒21逆时针旋转带着物料通过过料间隙6进入分选区13，同时物料在接触磁场时，物料在N-S交替磁场的偏心磁系22的高速旋转作用下做高速翻滚运动，当物料翻滚时，物料会自行在磁滚筒21表面分层，强磁性物料排布在最里层，弱磁性物料排布在中层，非磁性物料排布在最外层；最外层的非磁性细粉状物料由于颗粒小，所受的离心力小，很难从料层中及时分离开，然而高速风由反吹风路1的进风排料区11进入分选区13，外层的非磁性细粉状物料部分会随着高速风被带起，并且大部分细粉状非磁性物料会在风的作用下离开磁滚筒21表面，并且在反吹风路1的空间内布满，反吹风路1里的细粉状非磁性物料要么被风带走到收尘器内收集，要么落入尾矿区32。大部分非磁性颗粒状物料随着磁滚筒21旋转和磁场降低而被带到尾矿区32，弱磁性矿物随着磁滚筒21旋转和磁场降低而落到中矿区33，精矿随着磁滚筒21旋转和磁场降低而落到精矿区33，从而超细碎的物料得到了分级式、高效、精细的分选。
综上，本实施例提供的干式预选机，在偏心磁滚机构2的输送作用下，入料区31的物料输送至反吹风路1内并进行翻滚运动，以使物料在偏心磁滚机构2的表面分层，使得强磁性物料排布在最里层，弱磁性物料排布在中层，非磁性物料排布在最外层，最外层的非磁性细粉状物料由于颗粒小，所受的离心力小，很难从料层中及时分离开，可在反吹风路1内的反吹风作用下使得外层的非磁性细粉状物料部分会随着反吹风被带起，并且，大部分细粉状非磁性物料会在风的作用下离开偏心磁滚机构2表面，并且在反吹风路1的空间内布满，反吹风路1里的细粉状非磁性物料要么被风带走到，要么落入尾矿区32；大部分非磁性颗粒状物料随着磁滚筒21旋转和磁场降低而被带到尾矿区32，弱磁性矿物随着磁滚筒21旋转和磁场降低而落到中矿区33，精矿随着磁滚筒21旋转和磁场降低而落到精矿区33，从而超细碎的物料得到了分级式、高效、精细的分选。
该干式预选机提供了一个多物理场耦合的复杂分选环境进行超细碎物料的干式磁力分选，物料在其中主要受重力、离心力、磁翻转力、风力、磁场吸力等多力复合作用，从而达到分级式、高效、精细分选的目的，解决了高压辊磨机筛下的物料、立式磨机筛上的物料和锤式破碎机筛下的物料等超细碎物料的传统干选机的分选指标无法达标的问题，进而能够达到增大抛废率和提高金属品位、降低生产成本的效果。
需要说明的是，在本申请的描述中，术语“上”、“下”、“左”、“右”、“内”、“外”等 指示的方向或位置关系的术语是基于附图所示的方向或位置关系，这仅仅是为了便于描述，而不是指示或暗示所述装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，还需要说明的是，在本申请的描述中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域技术人员而言，可根据具体情况理解上述术语在本申请中的具体含义。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (10)

  1. 一种干式预选机，其特征在于，包括：反吹风路(1)和偏心磁滚机构(2)；其中，
    所述偏心磁滚机构(2)部分设置在所述反吹风路(1)内，所述反吹风路(1)用于向所述偏心磁滚机构(2)表面喷吹与物料输送方向相反的反吹风，所述偏心磁滚机构(2)用于输送物料，还用于提供偏心旋转磁场；
    所述偏心磁滚机构(2)的上方设有入料区(31)；
    所述偏心磁滚机构(2)的下方设置有尾矿区(32)、中矿区(33)和精矿区(34)；
    在所述偏心磁滚机构(2)的输送作用下，所述入料区(31)的物料输送至所述反吹风路(1)内并进行翻滚运动，以使物料在所述偏心磁滚机构(2)的表面分层，使得强磁性物料排布在最里层，弱磁性物料排布在中层，非磁性物料排布在最外层，最外层的非磁性物料在反吹风路(1)的反吹风的作用下离开所述偏心磁滚机构(2)的表面进入尾矿区(32)或随风吹出，弱磁性物料和强磁性物料在所述偏心磁滚机构(2)的磁场和输送作用下依次进入中矿区(33)和精矿区(34)。
  2. 根据权利要求1所述的干式预选机，其特征在于，所述偏心磁滚机构(2)包括：磁滚筒(21)和偏心磁系(22)；其中，
    所述磁滚筒(21)连接有筒体驱动件(23)，用于驱动所述磁滚筒(21)进行转动，以输送所述磁滚筒(21)表面的物料，以使物料输送至所述反吹风路(1)内；
    所述偏心磁系(22)偏心设置在所述磁滚筒(21)的内部，所述磁滚筒(21)的表面形成强磁区和弱磁区，所述强磁区设置在所述反吹风路(1)的分选区处，以使物料在磁场和风力作用下进行物料翻滚和非磁性物料的分选；
    所述偏心磁系(22)可转动地设置在所述磁滚筒(21)内，以使所述磁滚筒(21)表面的物料在旋转的磁场作用下进行翻滚运动。
  3. 根据权利要求2所述的干式预选机，其特征在于，
    所述偏心磁系(22)连接有磁系驱动件(24)，用于驱动所述偏心磁系(22)转动。
  4. 根据权利要求2所述的干式预选机，其特征在于，
    所述磁滚筒(21)为非金属筒体结构；和/或，
    所述反吹风路(1)为非金属风路；和/或，
    所述入料区(31)为非金属入料区。
  5. 根据权利要求1至4任一项所述的干式预选机，其特征在于，所述反吹风路(1)包括：
    进风排料区(11)，设置所述偏心磁滚机构(2)的下侧；
    出风出料区(12)，设置在所述偏心磁滚机构(2)的上侧；
    分选区(13)，设置在所述进风排料区(11)和所述出风出料区(12)之间。
  6. 根据权利要求6所述的干式预选机，其特征在于，
    所述偏心磁滚机构(2)的强磁区设置在所述反吹风路(1)的分选区(13)处，以使物料在磁场和风力作用下进行翻滚和物料分选。
  7. 根据权利要求1至4任一项所述的干式预选机，其特征在于，
    所述偏心磁滚机构(2)的下方在所述反吹风路(1)的一侧设有分料板(7)，在所述反吹风路(1)的进风口一侧隔离形成若干个下料区，用于进行不同磁性物料的隔离；
    所述分料板(7)沿水平方向位置可调地设置在所述偏心磁滚机构(2)的下方，并且，所述分料板(7)为伸缩板结构，用于调节上下高度和分料位置。
  8. 根据权利要求7所述的干式预选机，其特征在于，
    所述分料板(7)的侧壁、所述反吹风路(1)的内壁和/或所述偏心磁滚机构(2)的外壁设有耐磨片。
  9. 根据权利要求1至4任一项所述的干式预选机，其特征在于，
    所述入料区(31)处设有入料溜板(311)，用于对所述入料区(31)输入的物料进行缓冲。
  10. 根据权利要求1至4任一项所述的干式预选机，其特征在于，
    在所述反吹风路(1)的外部设有位于所述偏心磁滚机构(2)外周的清扫毛刷(4)和/或清扫刮板(5)，用于对所述偏心磁滚机构(2)表面附着的物料进行清扫。
PCT/CN2021/138774 2021-10-25 2021-12-16 一种干式预选机 WO2023070893A1 (zh)

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CN110947496A (zh) * 2019-12-10 2020-04-03 成都利君实业股份有限公司 磁性矿干法粉磨分选系统
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