A continuous separation device for extracting products from rich ores

Abstract

The present invention relates to the technical field of magnetic separation in ore dressing plants, and particularly to a continuous separation device for upgrading high-grade ores. It includes a frame, a vibrating feeding unit, a plate-type rough magnetic separation unit, and a roller-type fine magnetic separation unit; the vibrating box of the vibrating feeder in the vibrating feeding unit is arranged obliquely from the feeding end to the discharging end; the plate conveyor of the plate-type rough magnetic separation unit is fixedly connected in the vibrating box at the same inclination; the rough separation waste stone chute is fixedly connected to the bottom of the feeding end, the rough separation concentrate chute is fixedly connected to the bottom of the discharging section, and the fine magnetic separation feeding hopper is fixedly connected to the bottom of the rough separation concentrate chute; the roller-type fine magnetic separation unit includes a fine magnetic separation sorting roller, and the fine magnetic separation sorting roller is installed in the fine magnetic separation feeding hopper; a longitudinal partition plate is arranged between the roller and the material flow below the fine magnetic separation sorting roller, dividing it into a fine separation waste stone discharging hopper and a fine separation ore discharging hopper. It realizes the continuous multi-stage separation of magnetite, and on the basis of obtaining ideal product indexes, reduces the equipment, infrastructure investment, and operation and management costs.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic separation in ore dressing plants, and particularly to a continuous separation device for upgrading high-grade ores. Background Art

[0002] Since most current iron ore types have a certain degree of magnetism, magnetic separation is the main ore dressing method for iron ores. Among them, strongly magnetic minerals such as magnetite and titanomagnetite are mostly separated by drum magnetic separators, and weakly magnetic minerals such as hematite, limonite, and specularite are mostly separated by vertical ring high-intensity magnetic separators and horizontal ring high-intensity magnetic separators. Magnetite is the iron ore with a relatively large current reserve and the most extensive utilization. Due to its strong magnetism, it is separated and recovered by a weak magnetic separator with a relatively small magnetic field intensity.

[0003] Currently, many magnetite mines, especially those in Australia and Brazil, have a raw ore grade between 45% and 50%, which are high-grade ores with a relatively high magnetite content. The current iron ore sales grade is generally between 58% and 65%. Therefore, it is necessary to magnetically enrich magnetite to meet the required sales grade index. For some ores with a grade between 45% and 0%, the grade often cannot meet the sales requirements through a single magnetic separation.

[0004] The existing dry magnetic separator can only perform a single separation operation for each device. To obtain more ideal separation indexes, only multiple devices can be used, and multiple-stage operations are set for scavenging or cleaning operations. The equipment investment is too large, the floor space of the plant is occupied relatively large, the capital construction investment is high, and the operation and maintenance costs are high. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a continuous separation device for upgrading high-grade ores, which realizes continuous multiple separations of magnetite, and reduces equipment and capital construction investments and operation and management costs on the basis of obtaining ideal product indexes.

[0006] To achieve the above object, the present invention is realized by adopting the following technical solutions:

[0007] A continuous separation device for upgrading high-grade ores includes a frame, a vibrating feeding unit, a plate-type rough magnetic separation unit, and a roller-type fine magnetic separation unit; the vibrating feeding unit includes a vibrating feeder, and its vibrating box body is inclinedly arranged from the feeding end to the discharging end; the plate-type rough magnetic separation unit includes a plate conveyor, and the plate conveyor is fixedly connected in the vibrating box body with the same inclination; a rough separation waste chute is fixedly connected to the bottom of the feeding end, a rough separation concentrate chute is fixedly connected to the bottom of the discharging section, and a fine magnetic separation feeding hopper is fixedly connected to the bottom of the rough separation concentrate chute; the roller-type fine magnetic separation unit includes a fine magnetic separation sorting roller, and the fine magnetic separation sorting roller is installed in the fine magnetic separation feeding hopper; a longitudinal partition plate is arranged between the roller and the material flow below the fine magnetic separation sorting roller, dividing it into a cleaning waste discharging hopper and a cleaning ore discharging hopper.

[0008] Furthermore, the frame includes an upper platform and a lower platform; the vibrating feeding unit is installed on the upper platform, and the roller-type fine magnetic separation unit is installed on the lower platform.

[0009] Furthermore, the vibrating feeder includes a vibrating box body, eccentric excitation blocks, a vibrating motor, springs and a base; the eccentric excitation blocks are installed on the vibrating box body, and the eccentric excitation blocks are connected to the vibrating motor through a rotating shaft; the base is fixedly connected to the frame, the top of the spring is connected to the vibrating box body, and the bottom is connected to the base.

[0010] Furthermore, the plate-type rough magnetic separation unit is composed of a plate conveyor and a power connection plate; the plate conveyor includes a conveying plate, a driving roller and a driving motor; the driving motor is connected to the driving roller, and the conveying plate is installed on the driving roller; the conveying plate is formed by connecting a plurality of electromagnetic plate chains in series through guide chains at both ends.

[0011] Furthermore, the intensity of the electromagnetic plate chain is 100 - 200 mT, and the gap between adjacent chain plates is 1.3 - 1.48 times the maximum particle size of the magnetite ore.

[0012] Furthermore, one end of the chain plate is provided with a contact switch, and the contact switch is a spring-type contact switch; on the upper part of the longitudinal beam on one side of the sorting section of the plate conveyor where the contact switch is located, there is a power connection plate, and in the middle of the power connection plate, there is a power connection groove with a width of 10 - 20 mm, and both sides of the power connection groove are made of insulating rubber.

[0013] Furthermore, the roller-type fine magnetic separation unit includes a fine magnetic separation sorting roller and a roller motor; the fine magnetic separation sorting roller is located on the side of the discharge opening of the rough selection concentrate chute.

[0014] Furthermore, the fine magnetic separation sorting roller is internally provided with a permanent magnet magnetic system with a wrap angle of 110 - 130 degrees on the side facing the material flow. The magnetic system is fan-shaped and is arranged with the horizontal axis of the sorting roller as the center line. The rotation direction of the fine magnetic separation sorting roller on the side of the incoming material flow is downward.

[0015] Furthermore, the surface of the fine magnetic separation sorting roller is provided with a wear-resistant rubber layer with a thickness of 30 mm - 80 mm, and the magnetic field intensity on the surface of the roller is 0.6 - 0.8 times the magnetic field intensity of the rough selection.

[0016] Furthermore, the vibrating motor of the vibrating feeder, the driving motor of the plate conveyor, and the roller motor of the fine magnetic separation sorting roller are all variable-frequency speed-regulating motors. The current intensity of the power connection plate and the fine magnetic separation sorting roller is adjustable. The start-stop and variable-frequency signals of the three motors, and the current intensity signals of the power connection plate and the fine magnetic separation sorting roller are all connected to the control box.

[0017] Compared with the existing technology, the beneficial effects of the present invention are:

[0018] 1) The present invention creatively integrates the rough selection, fine selection, and vibrating box on the same frame, thus realizing the integration of two-stage operations in one device. The device structure is compact, which reduces the number of devices and the layout space, thereby reducing the investment in equipment and the construction cost of the plant, as well as the energy consumption and operation management cost.

[0019] 2) The present invention adopts the vibrating plate magnetic separation method for rough magnetic separation. After the material is fed into the upper part of the plate conveyor at the feeding end of the box, the magnetite is adsorbed under the action of the electromagnetic plate magnetic force in the separation section. Under the action of the vibration force provided by the vibrating box, the waste rocks with relatively weak magnetism or mixed in the adsorbed magnetite are thrown forward. The thrown objects are then continuously adsorbed and thrown by the subsequent electromagnetic plates. The non-magnetic waste rocks fall into the waste rock discharge hopper through the gaps between the plates of the electromagnetic plate under the action of gravity and are discharged. The concentrate after repeated adsorption and throwing finally moves to the unloading area along with the traction of the electromagnetic plate. At this time, the electromagnetic plate is powered off, and the magnetic force disappears. The rough magnetic separation concentrate is unloaded into the fine magnetic separation feeding hopper through the gaps of the return chain plate. The above structure realizes the repeated separation of magnetite under the magnetic force and vibration field, thus ensuring the continuous throwing of non-magnetic rocks for multiple times. Each throwing and re-separation can discharge some low-grade ores with relatively weak magnetism and ore-gangue associations again, thereby achieving the purpose of gradually increasing the grade and laying a solid foundation for the final high-grade concentrate product.

[0020] 3) The middle of the power connection plate of the present invention is a power connection slot with a width of only 5 - 10 mm, and the two sides are insulating rubber. The power connection switch is a spring-type contact quick switch. That is, after the contact touches the power connection plate, the spring compresses to energize the electromagnetic plate to magnetize the electromagnetic plate. This power connection method enables quick power connection and disconnection, and eliminates the danger of the contact, ensuring safety.

[0021] 4) The electromagnetic plate of the present invention can adjust the field strength between 100 - 200 mT by controlling the magnitude of the input current, thereby realizing the control and adjustment of the magnetic adsorption of the ore. The vibration motor of the vibration unit can be frequency-controlled to adjust the vibration intensity, and the drive motor of the plate conveyor belt can be frequency-controlled to adjust the residence time of the ore in the separation section, that is, to realize the control and adjustment of the separation time. Thus, the adjustment and control of the magnetic force and vibration force of the separation force field are realized, ensuring the acquisition of a suitable force field. Combined with the control of the separation time, it ensures the acquisition of high-grade separated ore products.

[0022] 5) The fine magnetic separation feed hopper of the present invention realizes the bundled feeding of the concentrate product of the rough magnetic separation in terms of width, thereby reducing the vertical width of the material to 200 - 400 mm, effectively avoiding the situation that the magnetic separation material cannot be adsorbed due to the overly wide sorting width of the material and the excessive reduction of the magnetic field strength when the boundary material is too far from the magnetic separation roller. It optimizes the sorting environment of the magnetic separation roller, thus effectively avoiding the loss of magnetite at the material flow boundary.

[0023] 6) The present invention conducts secondary fine magnetic separation on the product of the rough magnetic separation. The magnetic field strength of the fine magnetic separation is 0.6 - 0.8 times that of the rough magnetic separation. Thus, through the lower magnetic field strength of the fine magnetic separation, some magnetite or associated minerals with lower grades mixed in the rough magnetic separation concentrate are released again, realizing the secondary improvement of the grade of the rough magnetic separation concentrate. Through the rough magnetic separation and fine magnetic separation operations, the grade of magnetite with a grade above 45% can be increased to about 65%, thus obtaining high-quality iron concentrate and meeting the market demand for high-quality magnetite concentrate.

[0024] 7) The surface of the magnetic separation roller of the present invention is provided with a wear-resistant rubber layer of 30 mm - 80 mm, which effectively guarantees the service life of the magnetic separation roller, reduces the maintenance frequency of the magnetic separation roller, and improves the equipment operation rate.

[0025] 8) The roller motor of the fine magnetic separation sorting roller of the present invention is a variable-frequency speed-regulating motor, which can adjust the inertial kinetic energy when the adsorbed magnetic ore is unloaded, change the unloading trajectory of the magnetic ore, and thus adjust the proportion of the materials on both sides of the partition plate to ensure the grade of the magnetic separation concentrate to the greatest extent.

[0026] 9) The vibration motors of the vibrating feeder, the drive motors of the plate conveyor, and the roller motors of the fine magnetic separation sorting roller of the present invention are all variable-frequency speed-regulating motors. The current intensity of the power connection plate and the fine magnetic separation sorting roller is adjustable. The start-stop and variable-frequency signals of the three rotating motors, and the current intensity signals of the power connection plate and the fine magnetic separation sorting roller are all connected to the control box. The degree of automation is high. Description of the Drawings

[0027] Figure 1 is the schematic top view of the structure of the present invention;

[0028] Figure 2 is Figure 1 the A - A cross-sectional view of

[0029] Figure 3 is the schematic diagram of the power connection plate and the power connection groove structure of the present invention.

[0030] In the figure: 1 - frame; 2 - vibration box body; 3 - eccentric excitation block; 4 - rotating shaft; 5 - vibration motor; 6 - spring; 7 - base; 8 - upper platform; 9 - plate conveyor; 10 - power connection plate; 11 - longitudinal beam; 12 - conveying plate; 13 - guide chain; 14 - driving roller; 15 - driving motor; 16 - foundation platform; 17 - rough - selection waste - rock chute; 18 - rough - selection concentrate chute; 19 - first support; 20 - second support; 21 - contact switch; 22 - power connection groove; 23 - insulating rubber; 24 - fine magnetic - separation feed hopper; 25 - fine magnetic - separation sorting roller; 26 - roller motor; 27 - bearing seat; 28 - pedestal; 29 - lower platform; 30 - partition plate; 31 - fine - selection waste - rock discharge hopper; 32 - fine - selection ore discharge hopper; 33 - magnetic system. Detailed implementation mode

[0031] The following further describes in detail the implementation mode of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0032] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms

[0033] "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035]

Embodiment

[0036] As Figures 1-3 shown, a continuous - selection device for upgrading rich ore includes a frame 1, a vibration - feeding unit, a plate - type rough magnetic - separation unit, and a roller - type fine magnetic - separation unit.

[0037] The frame 1 includes an upper platform 8 and a lower platform 29. The upper platform 8 is located at the top of the frame 1, and the lower platform 19 is located at the lower part of the frame 1.

[0038] The vibrating feeder is a vibrating feeding unit, which includes a vibrating box body 2, eccentric excitation blocks 3, a vibrating motor 5, springs 6 and a base 7. The two eccentric excitation blocks 3 are symmetrically arranged and installed on the top of the vibrating box body 2. The eccentric excitation blocks 3 are connected to the vibrating motor 5 through a rotating shaft 4 and a universal coupling. The vibrating box body 2 is inclined from the feeding end to the discharging end. Two springs 6 are arranged on the outer sides of the side plates on both sides in the length direction of the box body. The base 7 is fixedly connected to the upper platform 8 of the frame 1. The top of the spring 6 is connected to the vibrating box body 2, and the bottom is connected to the base 7.

[0039] The plate type rough magnetic separation unit is composed of a plate type conveyor 9 and a power connection plate 10. The plate type conveyor 9 is placed inside the vibrating box body 2 at the same inclination and is connected to the inner side of the vibrating box body 2 through its two longitudinal beams 11 on both sides.

[0040] The plate type conveyor 9 includes a conveying plate 12, a driving roller 14 and a driving motor 15. The driving motor 15 is connected to the driving roller 14 and drives it to rotate. The conveying plate 12 is installed on the driving roller 14. The conveying plate 12 is formed by connecting a plurality of electromagnetic plate chain plates in series through guide chains 13 at both ends.

[0041] The intensity of the electromagnetic plate chain plate is 100 - 200 mT, and the gap between adjacent chain plates is 1.3 - 1.48 times the maximum particle size of magnetite ore. A contact switch 21 is provided at one end of each chain plate. The contact switch 21 is a spring type contact switch. A power connection plate 10 is provided on the upper part of the longitudinal beam 11 on one side of the contact switch 21 in the sorting section of the plate type conveyor 9. A power connection groove 22 with a width of 10 - 20 mm is provided in the middle of the power connection plate 10, and insulating rubber 23 is provided on both sides of the power connection groove 22.

[0042] The driving motor 15 of the driving roller 14 of the plate type conveyor 9 is placed outside the vibrating box body 2 and is bolted to the foundation platform 16 welded to the side wall of the box body.

[0043] The plate type conveyor 9 is sequentially divided into a sorting section and a ore discharging section from the feeding end to the discharging end in the length direction. The length of the sorting section is 3 - 8 meters, and the length of the discharging section is 1 - 2 meters. The roller type fine magnetic separation unit is located below the discharging section.

[0044] A rough selection waste rock chute 17 is connected below the sorting section, and a rough selection concentrate chute 18 is connected below the discharging section. The rough selection waste rock chute is connected to the upper platform 8 of the frame 1 through its first support 19, and the rough selection concentrate chute is connected to the upper platform 8 of the frame 1 through its second support 20.

[0045] The roller - type fine magnetic separation unit includes a fine magnetic separation feed hopper 24, a fine magnetic separation sorting roller 25, and a roller motor 26. The fine magnetic separation feed hopper 24 is connected to the rough - selection concentrate discharge chute 18 through a flange. The fine magnetic separation sorting roller 25 is connected to the lower - layer platform 29 of the frame 1 through bearing seats 27 at both ends thereof. The roller motor 26 is externally placed outside the fine magnetic separation feed hopper 24 and is connected to the lower - layer platform 29 of the frame 1 through a pedestal 28. The fine magnetic separation sorting roller 25 is located inside the fine magnetic separation feed hopper 24, below the side of the discharge opening of the rough - selection concentrate chute 18.

[0046] The fine magnetic separation feed hopper 24 is arranged below the return chain plate of the discharge section of the plate conveyor. It is a type of closed - mouth hopper, and the width of the lower opening of the hopper is 200 - 400 mm. The fine magnetic separation sorting roller 25 is arranged at a position 50 - 100 mm to the left of the material flow in the fine magnetic separation feed hopper 24.

[0047] Below the fine magnetic separation sorting roller 25, a longitudinal partition plate 30 is arranged between the roller and the material flow. Taking the longitudinal partition plate 30 as the boundary, a fine - selection waste - rock discharge hopper 31 and a fine - selection ore discharge hopper 32 are arranged below the partition plate.

[0048] On the side of the fine magnetic separation sorting roller 25 facing the material flow, a permanent - magnet magnetic system 33 with an included angle of 110 - 130 degrees is built - in. The magnetic system 33 is fan - shaped and is arranged with the horizontal axis of the sorting roller as the center line. The rotation direction of the fine magnetic separation sorting roller 25 on the side of the incoming material flow is downward.

[0049] The surface of the fine magnetic separation sorting roller 25 is provided with a wear - resistant rubber layer of 30 mm - 80 mm, and the magnetic field intensity on the surface of the roller is 0.6 - 0.8 times that of the rough - selection magnetic field intensity.

[0050] The vibration motor 5 of the vibrating feeder, the drive motor 15 of the plate conveyor, and the roller motor 26 of the fine magnetic separation sorting roller are all variable - frequency speed - regulating motors. The current intensity of the power connection plate 10 and the fine magnetic separation sorting roller 25 is adjustable. The start - stop and variable - frequency signals of the three motors, and the current intensity signals of the power connection plate 10 and the fine magnetic separation sorting roller 25 are all connected to the control box.

[0051] The present invention creatively integrates rough - selection, fine - selection, and the vibrating box 2 on the same frame, thus realizing the integration of two - stage operations on one device. The device structure is compact, which reduces the number of devices and the layout space, thereby reducing the equipment investment and the construction cost of the plant, and reducing the energy consumption and operation management cost.

[0052] In the rough magnetic separation of the present invention, a vibrating plate type magnetic separation method is adopted. After the material is fed into the upper part of the plate conveyor 9 at the feeding end of the box body, the magnetite is adsorbed under the action of the magnetic force of the electromagnetic plate in the separation section; under the action of the vibration force provided by the vibrating box body 2, part of the waste rock with relatively weak magnetism or mixed in the adsorbed magnetite is thrown forward, and the thrown objects are then continuously adsorbed and thrown by the subsequent electromagnetic plates. The non-magnetic waste rock falls between the plate gaps of the electromagnetic plate under the action of gravity and is discharged into the waste rock discharge hopper. The concentrate after repeated adsorption and throwing finally moves to the unloading area along with the traction of the electromagnetic plate. At this time, the electromagnetic plate is powered off and the magnetic force disappears, and the rough magnetic separation concentrate is unloaded into the fine magnetic separation feeding hopper 24 through the gaps of the return chain plates. The above structure realizes the repeated separation of magnetite under the magnetic force and vibration fields, thus ensuring the continuous throwing of non-magnetic rocks for magnetic minerals for multiple times. Each throwing and re-separation can discharge part of the low-grade ore with relatively weak magnetism and the ore-gangue intergrowth body again, so as to achieve the purpose of gradually increasing the grade, laying a solid foundation for the final high-grade concentrate product.

[0053] In the middle of the power connection plate 10 of the present invention, there is a power connection groove 22 with a width of only 5 - 10 mm, and insulating rubber 23 is provided on both sides. The power connection switch is a spring type contact switch 21, that is, after the contact touches the power connection plate 10, the spring is compressed to energize the electromagnetic plate to magnetize the electromagnetic plate. This power connection method has rapid power connection and disconnection, and eliminates the danger of the contacts, ensuring safety.

[0054] The electromagnetic plate of the present invention can adjust the magnetic field strength between 100 - 200 mT by controlling the magnitude of the input current, so as to control and adjust the magnetic adsorption of the ore; the vibration motor 5 of the vibration unit can be frequency-controlled to adjust the vibration intensity; the drive motor 15 of the plate conveyor belt can be frequency-controlled to adjust the residence time of the ore in the separation section, that is, the control and adjustment of the separation time can be realized. Thus, the adjustment and control of the magnetic force and vibration force of the separation force field are realized, ensuring the acquisition of a suitable force field. Combined with the control of the separation time, it ensures the acquisition of high-grade separated ore products.

[0055] The fine magnetic separation feeding hopper 24 of the present invention realizes the bundled feeding of the concentrate product of the rough magnetic separation in terms of width, thereby reducing the vertical width of the material to 200 - 400 mm, effectively avoiding the situation that the magnetic separation material cannot be adsorbed due to the too wide separation width of the material and the too large reduction of the magnetic field strength when the boundary material is too far from the magnetic separation roller. It is beneficial to optimize the separation environment of the magnetic separation roller, thus effectively avoiding the loss of magnetite ore at the material flow boundary.

[0056] The present invention performs re - fine magnetic separation on the products of rough magnetic separation. The magnetic field intensity of the fine magnetic separation is 0.6 - 0.8 times that of the rough magnetic separation. Thus, through the lower magnetic field intensity of the fine magnetic separation, some magnetite or associated minerals with lower grades mixed in the rough magnetic separation concentrate are released again, achieving a further improvement in the grade of the rough magnetic separation concentrate. Through the rough magnetic separation and fine magnetic separation operations, the grade of magnetite with a grade of over 45% can be increased to about 65%, thereby obtaining high - quality iron concentrate and meeting the market demand for high - quality magnetite concentrate.

[0057] The surface of the sorting roller 25 of the fine magnetic separation of the present invention is provided with a wear - resistant rubber layer of 30 mm - 80 mm, which effectively guarantees the service life of the magnetic separation roller, reduces the maintenance frequency of the magnetic separation roller, and improves the equipment operation rate.

[0058] The roller motor 26 of the sorting roller 25 of the fine magnetic separation of the present invention is a variable - frequency speed - regulating motor, so that the inertial kinetic energy when discharging the adsorbed magnetic ore can be adjusted, the falling trajectory of the magnetic ore can be changed, and thus the proportion of materials on both sides of the partition plate can be adjusted to ensure the grade of the magnetic separation concentrate to the greatest extent.

[0059] The vibration motor 5 of the vibrating feeder, the drive motor 15 of the plate conveyor, and the roller motor 26 of the sorting roller of the fine magnetic separation of the present invention are all variable - frequency speed - regulating motors. The current intensity of the power connection plate 10 and the sorting roller 25 of the fine magnetic separation can be adjusted. The start - stop and variable - frequency signals of the three rotating motors, and the current intensity signals of the power connection plate 10 and the sorting roller 25 of the fine magnetic separation are all connected to the control box. The degree of automation is high.

Claims

1. A continuous separation device for extracting products from rich ores, characterized in that: It includes a frame, a vibrating feeding unit, a plate-type rough magnetic separation unit and a roller-type fine magnetic separation unit; the vibrating feeding unit includes a vibrating feeder, and its vibrating box body is arranged obliquely from the feeding end to the discharging end; the plate-type rough magnetic separation unit includes a plate conveyor, and the plate conveyor is fixedly connected in the vibrating box body with the same inclination; the rough separation waste rock chute is fixedly connected to the bottom of the feeding end, the rough separation concentrate chute is fixedly connected to the bottom of the discharging end, and the fine magnetic separation feeding hopper is fixedly connected to the bottom of the rough separation concentrate chute; the roller-type fine magnetic separation unit includes a fine magnetic separation sorting roller, and the fine magnetic separation sorting roller is installed in the fine magnetic separation feeding hopper; a longitudinal partition plate is arranged between the fine magnetic separation sorting roller and the material flow below the fine magnetic separation sorting roller, dividing it into a fine separation waste rock discharging hopper and a fine separation ore discharging hopper; The vibrating feeder includes a vibrating box body, eccentric excitation blocks, vibrating motors, springs and a base; the eccentric excitation blocks are installed on the vibrating box body, and the eccentric excitation blocks are connected to the vibrating motors through rotating shafts; the base is fixedly connected to the frame, the top of the spring is connected to the vibrating box body, and the bottom is connected to the base; The plate-type rough magnetic separation unit is composed of a plate conveyor and a power connection plate; the plate conveyor includes a conveying plate, a driving roller and a driving motor; the driving motor is connected to the driving roller, and the conveying plate is installed on the driving roller; the conveying plate is formed by connecting a plurality of electromagnetic plate chain plates in series through guide chains at both ends; The magnetic field intensity of the electromagnetic plate chain plate is 100-200 mT, and the gap between adjacent chain plates is 1.3-1.48 times the maximum particle size of magnetite ore; One end of the chain plate is provided with a contact switch, and the contact switch is a spring-type contact switch; on the upper part of the longitudinal beam on one side of the contact switch in the sorting section of the plate conveyor, there is a power connection plate, and there is a power connection groove with a width of 10-20 mm in the middle of the power connection plate, and both sides of the power connection groove are insulating rubber; The roller-type fine magnetic separation unit includes a fine magnetic separation sorting roller and a roller motor; the fine magnetic separation sorting roller is located on the side of the discharging opening of the rough separation concentrate chute; On the side facing the material flow of the fine magnetic separation sorting roller, a permanent magnet magnetic system with a wrap angle of 110-130 degrees is built-in. The magnetic system is fan-shaped and is set with the horizontal axis of the sorting roller as the center line. The rotation direction of the fine magnetic separation sorting roller on the side of the incoming material flow is downward; The magnetic field intensity on the surface of the roller is 0.6-0.8 times that of the rough separation magnetic field intensity.

2. The continuous separation device for extracting products from rich ores according to claim 1, wherein: The frame includes an upper platform and a lower platform; the vibrating feeding unit is installed on the upper platform, and the roller-type fine magnetic separation unit is installed on the lower platform.

3. The continuous separation device for rich ore product extraction according to claim 1, characterized in that: The surface of the fine magnetic separation sorting roller is provided with a wear-resistant rubber layer of 30 mm-80 mm.

4. A continuous separation device for extracting products from rich ores according to claim 1, characterized in that: The vibrating motors of the vibrating feeder, the driving motors of the plate conveyor and the roller motors of the fine magnetic separation sorting roller are all variable frequency motors. The current intensity of the power connection plate and the fine magnetic separation sorting roller is adjustable. The start-stop and variable frequency signals of the three motors, and the current intensity signals of the power connection plate and the fine magnetic separation sorting roller are all connected to the control box.

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