CN110882840A - Stacked double-classification magnetic separator and magnetic ore dry grinding and sorting system - Google Patents

Stacked double-classification magnetic separator and magnetic ore dry grinding and sorting system Download PDF

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Publication number
CN110882840A
CN110882840A CN201911258838.XA CN201911258838A CN110882840A CN 110882840 A CN110882840 A CN 110882840A CN 201911258838 A CN201911258838 A CN 201911258838A CN 110882840 A CN110882840 A CN 110882840A
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CN
China
Prior art keywords
magnetic
separation
roller
belt
separator
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Pending
Application number
CN201911258838.XA
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Chinese (zh)
Inventor
何亚民
丁亚卓
徐智平
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Chengdu Leejun Industrial Co Ltd
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Chengdu Leejun Industrial Co Ltd
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Application filed by Chengdu Leejun Industrial Co Ltd filed Critical Chengdu Leejun Industrial Co Ltd
Priority to CN201911258838.XA priority Critical patent/CN110882840A/en
Publication of CN110882840A publication Critical patent/CN110882840A/en
Priority claimed from PCT/CN2020/082719 external-priority patent/WO2021114517A1/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/10Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B03C1/12Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operation; with movable pole pieces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/10Magnetic separation acting directly on the substance being separated with cylindrical material carriers
    • B03C1/14Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/16Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/16Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • B03C1/22Magnetic separation acting directly on the substance being separated with material carriers in the form of belts with non-movable magnets

Abstract

The invention discloses a stacked double-grading magnetic separator and a magnetic ore dry grinding and sorting system, and relates to the technical field of mineral magnetic separation. The stacked double-grading magnetic separator comprises a rack, wherein a roller magnetic separation mechanism and a belt magnetic separation mechanism are sequentially arranged below a feed inlet of the rack, the roller magnetic separation mechanism is provided with an eccentric magnetic system which is eccentrically arranged, the roller magnetic separation mechanism carries out rough separation on mineral raw materials, a feed end of the belt magnetic separation mechanism receives rough tailings which are roughly separated by the roller magnetic separation mechanism, a discharge end of the belt magnetic separation mechanism is provided with a magnetic roller magnetic system, and the belt magnetic separation mechanism carries out scavenging on the rough tailings which are roughly separated by the roller magnetic separation mechanism. The mineral raw materials entering the magnetic separator are subjected to rough separation and scavenging continuously, the magnetic separator is compact in overall structure and reasonable in layout, and the production cost can be effectively reduced.

Description

Stacked double-classification magnetic separator and magnetic ore dry grinding and sorting system
Technical Field
The invention relates to the technical field of mineral magnetic separation, in particular to a stacked double-classification magnetic separator and a magnetic ore dry grinding and sorting system.
Background
The magnetic separator is mainly used for mineral separation production and is key mineral separation equipment for separating magnetic minerals, nonmagnetic minerals and minerals with magnetic differences in a magnetic separation mineral separation process. Magnetic separation is based on the magnetic difference of different components in the separated materials, and in a working magnetic field generated by magnetic separation equipment, magnetic mineral particles can be magnetically gathered to form magnetic groups or magnetic chains through the difference of magnetic field force and other acting force applied to different particles, and the magnetic groups or the magnetic chains can move towards magnetic poles under the action of magnetic force, so that the magnetic separation is the basis of magnetic separation. In the mineral separation industry, a magnetic separator is generally adopted to perform a magnetic mineral separation process under the condition of qualified grinding granularity. The method is limited by the grade of raw ore, and the domestic ore dressing operation generally uses dry magnetic separation equipment, wherein the most widely used magnetic separation equipment mainly comprises a roller magnetic separator, a belt magnetic separator and the like.
Because the minerals have the characteristics of non-uniformity in flow, non-uniformity in grade and the like, the raw mineral materials cannot be separated from the magnetic substances in the minerals through one-time separation, and the finished products meet the high-quality requirements of qualified concentrate and qualified tailings, so that a production unit needs to configure a plurality of magnetic separation devices in series and parallel connection to perform rough separation and scavenging of the minerals respectively, and the configuration requirements of plants and equipment are high.
Disclosure of Invention
The invention aims to: the invention provides a stacked double-grading magnetic separator and a magnetic ore dry grinding and sorting system, aiming at the problem that multiple magnetic separation devices are required to be configured for roughing and scavenging minerals in the mineral separation process.
The technical scheme adopted by the invention is as follows:
the stacked double-grading magnetic separator comprises a rack, wherein a roller magnetic separation mechanism is arranged below a feed inlet of the rack, the roller magnetic separation mechanism is provided with an eccentric magnetic system which is eccentrically arranged, the roller magnetic separation mechanism carries out rough separation on mineral raw materials, a belt magnetic separation mechanism is arranged in the rack, the belt magnetic separation mechanism carries out scavenging on rough tailings which are roughly separated by the roller magnetic separation mechanism, a feeding end of the belt magnetic separation mechanism receives rough tailings which are roughly separated by the roller magnetic separation mechanism, and a discharging end of the belt magnetic separation mechanism is provided with a magnetic roller magnetic system.
Due to the arrangement, the mineral raw materials can be roughly separated and scavenged at one time after entering the magnetic separator, wherein the roller magnetic separation mechanism is used for roughly separating the mineral raw materials and separating concentrate and rough tailings, and the belt magnetic separation mechanism is used for scavenging rough tailings and separating the rough tailings into middlings and tailings. The stacked double-grading magnetic separator disclosed by the invention combines the characteristics of a drum-type magnetic separator and a belt magnetic separator, optimizes the layout, and has a compact structure and is convenient and fast to operate. The eccentric magnetic system of the roller magnetic separation mechanism enables the working surface of the roller magnetic separation mechanism to form a strong magnetic area and a weak magnetic area, and similarly, the magnetic system of the magnetic roller of the belt magnetic separation mechanism enables the working surface of the discharging end to form a strong magnetic area and a weak magnetic area. The magnetic substance is adsorbed on the working surface in the strong magnetic area, and the non-magnetic substance directly falls under the action of gravity. After entering the weak magnetic area from the strong magnetic area, the magnetic substance is thrown off under the action of gravity, magnetic force and inertia, so that the magnetic substance and the non-magnetic substance have different movement tracks, thereby realizing ore dressing and automatic ore unloading and slowing down the abrasion speed of a working face.
Furthermore, an enrichment magnetic system is arranged in the belt magnetic separation mechanism, and the magnetic field range of the enrichment magnetic system covers at least part of the conveying surface at the upper part of the belt magnetic separation mechanism, so that ores passing through the magnetic field of the enrichment magnetic system are layered according to grade; the enrichment magnetic system is arranged along the conveying direction of the belt magnetic separation mechanism. Wherein, the enriched magnetic system is preferably a flat magnetic system or a magnetic carrier roller group.
Due to the arrangement, when the magnetic field of the enrichment magnetic system passes through, under the action of magnetic force, rough tailings are paved on the conveying surface at the upper part of the belt magnetic separation mechanism, and low-grade magnetic minerals move towards the direction close to the conveying surface, so that the low-grade magnetic minerals are enriched to the lower part of the material layer, nonmagnetic minerals are enriched to the upper part of the material layer, and the tailing throwing efficiency of the magnetic system of the magnetic roller is improved.
Further, the magnetic field intensity of the eccentric magnetic system, the enriched magnetic system and the magnetic roller magnetic system is increased in sequence. Due to the arrangement, the magnetic field of the eccentric magnetic system is a low-intensity magnetic field, the magnetic field of the enriched magnetic system is a medium-intensity magnetic field, and the magnetic field of the magnetic roll magnetic system is a high-intensity magnetic field. Therefore, the roller magnetic separation mechanism adsorbs and separates high-grade magnetic minerals in the mineral raw materials and throws low-grade magnetic minerals and non-magnetic minerals. The magnetic field intensity of the magnetic system of the magnetic roller is higher than that of the enriched magnetic system, so that low-grade magnetic minerals at the lower part of the material layer are easier to form magnetic chains to be sorted out, and the sorting efficiency is improved.
Furthermore, in order to improve the grade of the concentrate and prevent mineral raw materials from forming magnetic clusters or magnetic chains on the working surface of the roller magnetic separation mechanism, the eccentric magnetic system forms an alternating magnetic field on the working surface of the roller magnetic separation mechanism, so that the magnetic clusters or the magnetic chains generate magnetic stirring when passing through the alternating magnetic field, and nonmagnetic minerals such as low-grade magnetic minerals and gangue and the like contained in the magnetic clusters or the magnetic chains fall off in stirring and overturning, thereby improving the grade of the concentrate. The eccentric magnetic system is a rotating magnetic system, namely the eccentric magnetic system is driven by a power source to rotate.
Further, the magnetic system of the magnetic roller at the discharge end of the belt magnetic separation mechanism is a fixed magnetic system, and in order to obtain a larger ore dressing area and improve the sorting efficiency, the magnetic wrap angle of the magnetic roller magnetic system is 150-200 degrees.
Further, in order to facilitate ore discharge and ore conveying of the roller magnetic separation mechanism and the belt magnetic separation mechanism, a concentrate hopper is arranged on the rack and is positioned below the roller magnetic separation mechanism; the roller magnetic separation mechanism conveys concentrate to a concentrate hopper through a concentrate chute; the roller magnetic separation mechanism conveys coarse tailings to the feeding end of the belt magnetic separation mechanism through a tailings chute; the machine frame is provided with a middling hopper and a tailing hopper, the middling hopper and the tailing hopper are located below the discharging end of the belt magnetic separation mechanism, and the middling hopper and the tailing hopper respectively receive middling and tailings separated by the belt magnetic separation mechanism.
Furthermore, a rough separation material distribution plate capable of swinging is arranged below the roller magnetic separation mechanism, and the roller magnetic separation mechanism adjusts the material distribution position through the rough separation material distribution plate. Due to the arrangement, the material distribution positions of the concentrate and the rough tailings can be adjusted through the deflection rough separation material distribution plate according to different requirements of the mineral separation process.
Furthermore, a swingable sweeping separation plate is arranged below the discharging end of the belt magnetic separation mechanism, and the belt magnetic separation mechanism adjusts the material distribution position through the sweeping separation plate. Due to the arrangement, the material distributing positions of the middlings and the coarse ores can be adjusted through the deflection sweeping material distributing plate according to different requirements of the ore dressing process.
Furthermore, in order to enable the feed inlet to feed uniformly and prevent the feed inlet from being blocked, the lower end of the feed inlet is provided with a flow regulating valve.
The magnetic ore dry grinding and sorting system comprises a high-pressure roller mill and the magnetic separation, wherein the high-pressure roller mill and the magnetic separation are sequentially connected, a feed opening of the high-pressure roller mill is connected with a feed opening of the magnetic separator, a concentrate hopper and a tailing hopper of the magnetic separator are respectively connected with the concentrate hopper and the tailing hopper, and a middling hopper of the magnetic separator is connected with the feed opening of the high-pressure roller mill.
Furthermore, a screening device is arranged between the high-pressure roller mill and the magnetic separator, the coarse ore materials screened by the screening device are conveyed to a feed inlet of the high-pressure roller mill, and the fine ore materials screened by the screening device enter the feed inlet of the magnetic separator.
Further, the granularity of the raw ore entering the high-pressure roller mill is 0-60 mm; the processing granularity of the magnetic separator is 0-20 mm.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the stacked double-grading magnetic separator disclosed by the invention has the advantages that concentrate is separated by utilizing the eccentric magnetic system, middlings and tailings are separated by utilizing the magnetic roller magnetic system, and qualified concentrate and tailings can be obtained by continuously separating mineral raw materials entering the magnetic separator for one time. The magnetic ore dry grinding and sorting system using the stacked double-grading magnetic separator has the advantages of low energy loss and high efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a stacked double-stage magnetic separator according to the present invention;
FIG. 2 is a process flow diagram of a first embodiment of the magnetic ore dry grinding and sorting system of the present invention;
FIG. 3 is a process flow diagram of a second embodiment of the magnetic ore dry grinding and sorting system of the present invention;
FIG. 4 is a schematic structural diagram of another embodiment of a magnetic separator of the magnetic ore dry grinding and sorting system of the present invention;
the labels in the figure are: 1-a magnetic separator; 2-a screening device; 3-high pressure roller mill; 4-a storage bin; 5-a concentrate hopper; 6-a tailing hopper; 10-a frame; 20-roller magnetic separation mechanism; 30-belt magnetic separation mechanism; 101-a feed inlet; 102-a concentrate bucket; 103-tailing bucket; 104-middle ore bucket; 105-a concentrate chute; 106-tailing chute; 107-rough separation material separation plate; 108-sweeping separation plate; 109-flow regulating valve; 201-eccentric magnetic system; 202-an outer drum; 301-magnetic roller magnetic system; 302-enrichment of magnetic systems; 303-drive roll; 304-a driven roller; 305-belt.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, a stacked double-graded magnetic separator disclosed according to the present embodiment includes a frame 10, a drum magnetic separation mechanism 20 and a belt magnetic separation mechanism 30, wherein the drum magnetic separation mechanism 20 and the belt magnetic separation mechanism 30 are installed in the frame 10. The roller magnetic separation mechanism 20 can perform rough separation on mineral raw materials, the roller magnetic separation mechanism 20 is provided with an eccentric magnetic system 201 which is eccentrically arranged, and the roller magnetic separation mechanism 20 with the eccentric magnetic system 201 can perform continuous ore separation and automatic ore discharge; the belt magnetic separation mechanism 30 can carry out scavenging on the rough tailings roughed in the drum magnetic separation mechanism 20, the feeding end of the belt magnetic separation mechanism 30 receives the rough tailings, and the discharging end of the belt magnetic separation mechanism 30 is provided with a magnetic roller magnetic system 301 for scavenging. Preferably, the magnetic separator is arranged to be fed from the top, and the feeding hole 101 is arranged at the top of the frame 10; the roller magnetic separation mechanism 20 and the belt magnetic separation mechanism 30 are sequentially arranged below the feeding hole 101 of the frame 10.
Specifically, the drum magnetic separation mechanism 20 includes an outer drum 202 and an eccentric magnetic system 201 eccentrically disposed within the outer drum 202. In one embodiment, the eccentric magnetic system 201 and the outer roller 202 can rotate under the driving of their respective power sources, and the eccentric magnetic system 201 and the outer roller 202 rotate relatively, and both can rotate in the same direction or in opposite directions; in another embodiment, the eccentric magnetic system 201 is fixed relative to the frame 10, and the outer drum 202 rotates relative to the eccentric magnetic system 201 under the driving of the power source, so that the eccentric magnetic system 201 and the outer drum 202 rotate relative to each other. The eccentric magnetic system 201 in eccentric arrangement forms a weak magnetic area and a strong magnetic area on the working surface of the outer roller 202, mineral raw materials fall to the strong magnetic area of the working surface from the feeding hole 101, high-grade magnetic minerals are adsorbed on the working surface of the strong magnetic area, low-grade magnetic minerals and non-magnetic minerals directly fall, and after the high-grade magnetic minerals enter the weak magnetic area of the working surface along with the rotation of the outer roller 202, the high-grade magnetic minerals cannot fall against self gravity due to the magnetic force applied to the high-grade magnetic minerals, so that the purpose of primary sorting is achieved. The belt magnetic separation mechanism 30 comprises a driving roller 303, a driven roller 304 and a belt 305, wherein the belt 305 is sleeved on the peripheries of the driving roller 303 and the driven roller 304, the driving roller 303 is driven by a power source to rotate, and the belt 305 and the driven roller 304 are driven to rotate. The magnetic roller magnetic system 301 may be disposed within the drive roller 303 or the driven roller 304. In this embodiment, the magnetic system 301 is preferably disposed in the driven roller 304, the driven roller 304 is located at the discharging end of the belt magnetic separation mechanism 30, and the driving roller 303 is located at the feeding end of the belt magnetic separation mechanism 30. The magnetic roller magnetic system 301 is arranged at the discharging end of the belt 305 conveying mechanism, the magnetic roller magnetic system 301 forms a strong magnetic area and a weak magnetic area on the working surface of the discharging end along the conveying direction of the belt 305, the strong magnetic area is located at the arc-shaped section of the working surface, after entering the strong magnetic area, low-grade magnetic minerals in the coarse tailings are adsorbed on the working surface, non-magnetic minerals are separated from the working surface under the action of gravity, the low-grade magnetic minerals are separated from the working surface after entering the weak magnetic area along the conveying direction of the belt 305, and therefore the purpose of sorting useful components recovered from the coarse tailings is achieved.
The eccentric magnetic system 201 of the drum magnetic separation mechanism 20 includes a plurality of magnetic poles arranged in a cylindrical shape. In this embodiment, the eccentric magnetic system 201 forms an alternating magnetic field on the working surface of the drum magnetic separation mechanism 20. Specifically, adjacent magnetic poles of the eccentric magnetic system 201 in the circumferential direction are different, adjacent magnetic poles in the axial direction are the same, the magnetic minerals are adsorbed on the outer drum 202 under the action of the magnetic field of the eccentric magnetic system 201, and the magnetic minerals pass through the alternating magnetic field with the periodically changing magnetic field direction in the process of moving in the circumferential direction, so that the magnetic minerals are turned over and broken up magnetic clusters, magnetic inclusion is prevented, and the grade of the concentrate is improved.
The magnetic system 301 of the magnetic roller of the belt magnetic separation mechanism 30 may be a concentric magnetic system, or a concentric cylindrical magnetic system or an eccentric cylindrical magnetic system. It should be noted that the concentric magnetic lack system is a fixed magnetic system, the magnetic wrap angle is less than 360 degrees, the concentric magnetic lack system is concentrically arranged in the roller, and the roller and the magnetic system rotate relatively; the concentric cylindrical magnetic system is a rotating magnetic system, the magnetic wrap angle is 360 degrees, and the concentric cylindrical magnetic system is concentrically arranged in the roller and rotates along with the roller; the eccentric cylindrical magnetic system can be a fixed magnetic system or a rotary magnetic system, the magnetic wrap angle is 360 degrees, the eccentric cylindrical magnetic system is eccentrically arranged in the roller, and the roller and the magnetic system rotate relatively. In order to control the production and maintenance cost, the magnetic roller magnetic system 301 in this embodiment preferably adopts a concentric circle magnetic-lack system, the magnetic wrap angle of the magnetic roller magnetic system 301 is 150-.
Optionally, an enrichment magnetic system 302 is arranged in the belt magnetic separation mechanism 30, and the magnetic field range of the enrichment magnetic system 302 covers at least part of the conveying surface at the upper part of the belt magnetic separation mechanism 30, so that ores passing through the magnetic field of the enrichment magnetic system 302 are layered according to grade; the enrichment magnetic system 302 is arranged along the conveying direction of the belt magnetic separation mechanism 30. Wherein, the enrichment magnetic system 302 can adopt a flat magnetic system or a magnetic carrier roller group.
Specifically, the belt 305 of the belt magnetic separation mechanism 30 is provided with an enrichment magnetic system 302 inside, the enrichment magnetic system 302 is close to the upper conveying surface of the belt 305, so that the magnetic field range of the enrichment magnetic system 302 covers at least part of the upper conveying surface, the enrichment magnetic system 302 is used for pre-enriching the low-grade magnetic minerals in the coarse tailings to the lower part of the material layer and the non-magnetic minerals to the upper part of the material layer by using the magnetic force, thereby facilitating the formation of magnetic chains after the low-grade magnetic minerals enter the magnetic field range of the magnetic system 301 of the magnetic roller, and improving the separation efficiency and the grade of the product. The enrichment magnetic system 302 may use a flat magnetic system or a magnetic roller set arranged along the conveying direction of the belt 305, and both the flat magnetic system and the magnetic roller set can play a role of forming an enrichment magnetic field on the upper conveying surface. The magnetic carrier roller group can support the upper conveying surface of the belt 305, reduce the friction between the enriched magnetic system and the belt, and prolong the service life.
Further, the magnetic field intensity of the eccentric magnetic system 201, the enriched magnetic system 302 and the magnetic roller magnetic system 301 in this embodiment is increased in order. Specifically, the magnetic field strength of the enrichment magnetic system 302 is greater than that of the eccentric magnetic system 201, so that the enrichment magnetic system 302 achieves a better enrichment effect, and low-grade magnetic minerals which are not sorted out by the eccentric magnetic system 201 are enriched to the lower part of the material layer to the greatest extent; the magnetic field intensity of the magnetic roller magnetic system 301 is greater than that of the enriched magnetic system 302, so that the magnetic roller magnetic system 301 achieves a better sorting effect, and low-grade magnetic minerals enriched to the lower part of the material layer are easier to form a magnetic chain.
In order to optimize the structural arrangement of the magnetic separator, optionally, a concentrate hopper 102 matched with the roller magnetic separation mechanism 20 for discharging ore is arranged on the rack 10, the concentrate hopper 102 is preferably arranged below the roller magnetic separation mechanism 20, the roller magnetic separation mechanism 20 coarsely separates the mineral raw materials into concentrate and coarse tailings, wherein the concentrate is discharged to the concentrate hopper 102, and the concentrate hopper 102 discharges the collected concentrate out of the magnetic separator. Concentrate separated by the roller magnetic separation mechanism 20 can directly fall to the concentrate hopper 102 for ore discharge, and a concentrate chute 105 communicated with the concentrate hopper 102 can also be preferably arranged for ore discharge; correspondingly, the coarse tailings separated by the roller magnetic separation mechanism 20 can directly fall to the feeding end of the belt magnetic separation mechanism 30, and a tailing chute 106 with the lower end leading to the feeding end of the belt magnetic separation mechanism 30 can also be preferably arranged for ore discharge. The arrangement of the concentrate chute 105 and the tailing chute 106 can be optimized to prevent the ore from being mixed after being sorted. The frame 10 is provided with a tailing hopper 103 and a middling hopper 104 which are matched with the belt magnetic separation mechanism 30 for ore discharge, the tailing hopper 103 and the middling hopper 104 are sequentially arranged along the conveying direction of the discharge end belt 305, and middling and tailings separated by the roller magnetic separation mechanism 20 are respectively gathered and discharged in the middling hopper 104 and the tailing hopper 103. Wherein, the discharge end of the belt magnetic separation mechanism 30 can directly discharge to the tailing hopper 103 and the middling hopper 104, and can also discharge and discharge ore by arranging a chute to match with the tailing hopper 103 and the middling hopper 104.
Optionally, a swingable rough separation material separation plate 107 is arranged below the roller magnetic separation mechanism 20, and the rough separation material separation plate 107 is located in the discharging range of the roller magnetic separation mechanism 20. Specifically, the upper end of the concentrate chute 105 and the upper end of the tailing chute 106 are respectively connected with the lower ends of the roughing material separating plates 107, and the roughing material separating plates 107 adjust the material separating positions of the concentrate and the roughing tailings through deflection. Under the influence of various factors such as the magnetic strength of the mineral raw materials, the granularity of useful minerals and gangue minerals, the embedding mode of the useful minerals and the like, a proper mineral separation process needs to be selected according to the properties of the minerals, the material distribution position of the separated minerals is adjusted, and the material distribution positions of the concentrate and the coarse tailings can be conveniently adjusted by swinging the rough separation material distribution plate 107, so that the requirements of different mineral separation processes are met. Similarly, a sweeping separation plate 108 capable of swinging is arranged below the discharging end of the belt magnetic separation mechanism 30, the sweeping separation plate 108 is located in the discharging range of the belt magnetic separation mechanism 30, and the material distribution positions of middlings and tailings can be adjusted by swinging the sweeping separation plate 108. Specifically, the upper end of the middle ore hopper 104 and the upper end of the tailing hopper 103 are respectively connected with the lower ends of the scavenging and distributing plates 108.
Optionally, a flow regulating valve 109 is disposed at the lower end of the feeding port 101 of the frame 10. The flow regulating valve 109 is used for preventing the material accumulated at the feed inlet 101 from being fed at a non-uniform speed, and the non-uniform feeding makes the magnetic minerals in the ore raw material not effectively sorted in the ore dressing area, namely, the magnetic minerals are discharged along with the non-magnetic minerals, so that the sorting efficiency is reduced.
Example 2
Referring to fig. 2, the magnetic ore dry grinding and sorting system disclosed in the present embodiment includes a high-pressure roller mill 3 and a magnetic separator 1, a feed opening of the high-pressure roller mill 3 is connected to a feed opening of the magnetic separator 1, the magnetic separator 1 sorts ground raw ore screened by the high-pressure roller mill 3 into concentrate, middlings and tailings, a concentrate hopper of the magnetic separator 1 is connected to a concentrate hopper 5, a middlings hopper of the magnetic separator 1 is connected to a feed opening of the high-pressure roller mill 3, and a tailings hopper of the magnetic separator 1 is connected to a tailings hopper 6.
Specifically, raw ore in the bin 4 enters from a feed port of the high-pressure roller mill 3, and ground raw ore of the high-pressure roller mill 3 enters the magnetic separator 1 through a feed port of the high-pressure roller mill; the magnetic separator 1 separates the ground raw ore into concentrate, middlings and tailings, and the concentrate and the tailings separated by the magnetic separator 1 are discharged to a concentrate hopper 5 and a tailing hopper 6 respectively; the middlings separated by the magnetic separator 1 are returned to the feed inlet of the high-pressure roller mill 3 through the stock bin 4 for circular grinding and separation.
Optionally, in a first specific embodiment, the structure of the magnetic separator 1 of the magnetic ore dry grinding and sorting system is the same as that in example 1; in the second embodiment, the magnetic separator 1 of the magnetic ore dry grinding and sorting system is a magnetic classification preselection machine, which comprises a frame 10, an outer roller 202 and an eccentric magnetic system 201 arranged in a cylindrical shape, as shown in fig. 4, the eccentric magnetic system 201 is eccentrically arranged in the outer roller 202, the eccentric magnetic system 201 and the outer roller 202 rotate relatively, the magnetic field intensity of the eccentric side working surface of the outer roller 202 is greater than that of the non-eccentric side working surface of the outer roller 202, the magnetic field intensity of the lower working surface of the outer roller 202 is gradually reduced along the rotation direction of the outer roller 202, and the tailing bucket 103, the middling bucket 104 and the concentrate bucket 102 are sequentially arranged on the frame 10 below the outer roller 202 from a strong magnetic area to a weak magnetic area. Both the above two magnetic separators can achieve the effect of one-time continuous separation, and the first specific implementation mode is preferably adopted in the embodiment.
Optionally, the particle size of the raw ore processed by the high-pressure roller mill is 0-60 mm, preferably 0-30 mm; the magnetic separator processing granularity of the magnetic ore dry grinding and sorting system is 0-20 mm, and preferably 0-6 mm.
Example 3
The magnetic ore dry grinding and sorting system disclosed in the embodiment is described with reference to fig. 3, which comprises a high-pressure roller mill 3, a screening device 2 and a magnetic separator 1, wherein a feed opening of the high-pressure roller mill 3 is connected with a feed opening of the screening device 2, a coarse material opening of the screening device 2 is connected with a feed opening of the high-pressure roller mill 3, and a fine material opening of the screening device 2 is connected with a feed opening of the magnetic separator 1; the magnetic separator 1 separates the fine materials screened by the screening device 2 into concentrate, middlings and tailings, a concentrate hopper of the magnetic separator 1 is connected with a concentrate hopper 5, a middlings hopper of the magnetic separator 1 is connected with a feed inlet of the high-pressure roller mill 3, and a tailings hopper of the magnetic separator 1 is connected with a tailings hopper 6.
Specifically, raw ore in the bin 4 enters from a feed inlet of the high-pressure roller mill 3, and ground materials of the high-pressure roller mill 3 enter the screening device 2 through a feed outlet of the high-pressure roller mill; the coarse material that screening plant 2 sieved does not reach magnet separator 1 and handles the requirement, the coarse material that screening plant 2 sieved is returned by high-pressure roller mill 3 feed inlet and is carried out the circulation grinding, the fine material that screening plant 2 sieved accords with magnet separator 1 and handles the requirement, the fine material that screening plant 2 sieved gets into magnet separator 1 by magnet separator 1 feed inlet, magnet separator 1 is selected separately the fine material and is concentrate, middlings, tailing, the concentrate and the tailing that magnet separator 1 was selected separately are unloaded to concentrate hopper 5, tailing hopper 6 respectively. The middlings separated by the magnetic separator 1 are returned to the feed inlet of the high-pressure roller mill 3 through the stock bin 4 for circular grinding and separation.
Optionally, in a first specific embodiment, the structure of the magnetic separator 1 of the magnetic ore dry grinding and sorting system is the same as that in example 1; in the second embodiment, the magnetic separator 1 of the magnetic ore dry grinding and sorting system is a magnetic classification preselection machine, which comprises a frame 10, an outer roller 202 and an eccentric magnetic system 201 arranged in a cylindrical shape, as shown in fig. 4, the eccentric magnetic system 201 is eccentrically arranged in the outer roller 202, the eccentric magnetic system 201 and the outer roller 202 rotate relatively, the magnetic field intensity of the eccentric side working surface of the outer roller 202 is greater than that of the non-eccentric side working surface of the outer roller 202, the magnetic field intensity of the lower working surface of the outer roller 202 is gradually reduced along the rotation direction of the outer roller 202, and the tailing bucket 103, the middling bucket 104 and the concentrate bucket 102 are sequentially arranged on the frame 10 below the outer roller 202 from a strong magnetic area to a weak magnetic area. Both the above two magnetic separators can achieve the effect of one-time continuous separation, and the magnetic separator of the first embodiment is preferably adopted in the embodiment.
Optionally, the particle size of the raw ore processed by the high-pressure roller mill is 0-60 mm, preferably 0-30 mm; the magnetic separator processing granularity of the magnetic ore dry grinding and sorting system is 0-20 mm, and preferably 0-6 mm.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a fold formula of arranging two hierarchical magnet separators, includes frame (10), and feed inlet (101) below of frame (10) is provided with cylinder magnetic separation mechanism (20), eccentric magnetism that cylinder magnetic separation mechanism (20) had eccentric arrangement is (201), cylinder magnetic separation mechanism (20) carry out the rough concentration to mineral raw materials, its characterized in that, be provided with belt magnetic separation mechanism (30) in frame (10), belt magnetic separation mechanism (30) are right the rough tailings of cylinder magnetic separation mechanism (20) rough concentration are swept and are selected, the rough tailings of cylinder magnetic separation mechanism (20) rough concentration are received to the pan feeding end of belt magnetic separation mechanism (30), the discharge end of belt magnetic separation mechanism (30) is provided with magnetism roller magnetism and is (301).
2. The stacked double-grading magnetic separator according to claim 1, wherein the belt magnetic separation mechanism (30) is internally provided with an enrichment magnetic system (302), and the magnetic field range of the enrichment magnetic system (302) covers at least part of the conveying surface at the upper part of the belt magnetic separation mechanism (30) so that ores passing through the magnetic field of the enrichment magnetic system (302) are graded according to grades; the enrichment magnetic system (302) is arranged along the conveying direction of the belt magnetic separation mechanism (30).
3. The stacked double-graded magnetic separator as recited in claim 2, wherein the enrichment magnet system (302) is a flat plate magnet system or a set of magnet carrier rollers.
4. The stacked double-graded magnetic separator as claimed in claim 2, wherein the magnetic field strength of the eccentric magnetic system (201), the enriched magnetic system (302) and the magnetic roller magnetic system (301) is increased in sequence.
5. The stacked double-graded magnetic separator as recited in claim 1, wherein the eccentric magnetic system (201) forms an alternating magnetic field on a working surface of the drum magnetic separator (20); the eccentric magnetic system (201) is a rotating magnetic system.
6. The stacked double-graded magnetic separator as recited in claim 1, wherein the magnetic roll magnetic system (301) is a fixed magnetic system; the magnetic wrap angle of the magnetic system (301) of the magnetic roller is 150-200 degrees.
7. The stacked double-grading magnetic separator as claimed in any one of claims 1 to 6, wherein a concentrate hopper (102) is arranged on the machine frame (10), and the concentrate hopper (102) is positioned below the roller magnetic separator (20); the roller magnetic separation mechanism (20) conveys concentrate to the concentrate hopper (102) through a concentrate chute (105); the roller magnetic separation mechanism (20) conveys coarse tailings to the feeding end of the belt magnetic separation mechanism (30) through a tailings chute (106); the machine frame (10) is provided with a middling bucket (104) and a tailing bucket (103), the middling bucket (104) and the tailing bucket (103) are located below the discharging end of the belt magnetic separation mechanism (30), and the middling bucket (104) and the tailing bucket (103) respectively receive middling and tailings separated by the belt magnetic separation mechanism (30).
8. The stacked double-grading magnetic separator as claimed in any one of claims 1 to 6, wherein a swingable rough separation plate (107) is disposed below the roller magnetic separation mechanism (20), and the roller magnetic separation mechanism (20) adjusts the separation position through the rough separation plate (107); a swingable scavenging material distributing plate (108) is arranged below the discharging end of the belt magnetic separation mechanism (30), and the belt magnetic separation mechanism (30) adjusts the material distributing position through the scavenging material distributing plate (108); the lower end of the feed inlet (101) is provided with a flow regulating valve (109).
9. The magnetic ore dry grinding and sorting system is characterized by comprising a high-pressure roller mill (3) and the magnetic separator (1) according to any one of claims 1 to 8, which are sequentially connected, wherein the feed opening of the high-pressure roller mill is connected with the feed opening of the magnetic separator, the concentrate hopper and the tailing hopper of the magnetic separator (1) are respectively connected with the concentrate hopper (5) and the tailing hopper (6), and the middling hopper of the magnetic separator (1) is connected with the feed opening of the high-pressure roller mill (3).
10. The magnetic ore dry grinding and sorting system according to claim 9, characterized in that a screening device (2) is arranged between the high-pressure roller mill (3) and the magnetic separator (1), the coarse ore material screened by the screening device (2) is conveyed to the feed inlet of the high-pressure roller mill (3), and the fine ore material screened by the screening device (2) enters the feed inlet of the magnetic separator (1); the granularity of the raw ore entering the high-pressure roller mill (3) is 0-60 mm; the processing granularity of the magnetic separator (1) is 0-20 mm.
CN201911258838.XA 2019-12-10 2019-12-10 Stacked double-classification magnetic separator and magnetic ore dry grinding and sorting system Pending CN110882840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911258838.XA CN110882840A (en) 2019-12-10 2019-12-10 Stacked double-classification magnetic separator and magnetic ore dry grinding and sorting system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911258838.XA CN110882840A (en) 2019-12-10 2019-12-10 Stacked double-classification magnetic separator and magnetic ore dry grinding and sorting system
PCT/CN2020/082719 WO2021114517A1 (en) 2019-12-10 2020-04-01 Dual-stage combined magnetic separator, and dry grinding and separation system for magnetic mineral

Publications (1)

Publication Number Publication Date
CN110882840A true CN110882840A (en) 2020-03-17

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CN201911258838.XA Pending CN110882840A (en) 2019-12-10 2019-12-10 Stacked double-classification magnetic separator and magnetic ore dry grinding and sorting system

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021114517A1 (en) * 2019-12-10 2021-06-17 成都利君实业股份有限公司 Dual-stage combined magnetic separator, and dry grinding and separation system for magnetic mineral

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021114517A1 (en) * 2019-12-10 2021-06-17 成都利君实业股份有限公司 Dual-stage combined magnetic separator, and dry grinding and separation system for magnetic mineral

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