An integrated iron ore upgrading system

Abstract

The present invention relates to an integrated iron ore upgrading system, which includes a primary crushing and rough separation module, an intermediate crushing and first-stage beneficiation module, a fine crushing and second-stage beneficiation module, a high-pressure roll and third-stage beneficiation module, a vehicle-mounted unit, and a bucket elevator. The vehicle-mounted unit is formed by connecting 4 sections of car body boxes in series. The primary crushing and rough separation module, the intermediate crushing and first-stage beneficiation module, the fine crushing and second-stage beneficiation module, and the high-pressure roll and third-stage beneficiation module are respectively connected to each section of the car body box. Under the traction of a hydraulic cylinder, they are placed flat on the upper end of the car body box or stand upright at the tail of the car body box. The primary crushing and rough separation module, the intermediate crushing and first-stage beneficiation module, the fine crushing and second-stage beneficiation module, and the high-pressure roll and third-stage beneficiation module respectively send iron-containing concentrate to the front-end bucket elevator through a belt conveyor, and then the bucket elevator feeds materials to the front-end crushing and beneficiation module. The present invention integrates the four-stage crushing and dry separation operations of magnetite in a processing train to directly load the concentrate onto a vehicle, so as to reduce the investment in equipment and workshops.

Description

Technical Field

[0001] The present invention relates to the technical field of crushing-magnetic separation in ore dressing plants, and particularly to an integrated iron ore upgrading system. Background Art

[0002] Currently, there are a large number of open-pit magnetite mines in foreign countries such as Africa, Brazil, and Australia. A considerable part of the ore in these magnetite mines has an iron grade between 35% and 40%. For these open-pit magnetite mines, generally, dry separation is required for the ore to remove gangue contained in the ore and surrounding rock mixed in during mining, and then the grade can reach between 58% and 62% for sale.

[0003] However, magnetite with a grade between 35% and 40% is generally dry-separated after coarse crushing or medium crushing. Since the particle size of the coarse crushing and medium crushing products is relatively large, many large pieces of ore are the intergrowth bodies of ore and gangue. If this part of the ore enters the waste rock, it will reduce the recovery rate of the final concentrate, and if it enters the ore, it will reduce the grade of the final concentrate. Therefore, for such ore, four-stage crushing with coarse, medium, fine, and high-pressure rolls should be adopted to make the final particle size of the ore about 5 mm, so that the ore can be extremely dissociated through crushing, and dry separation should be adopted after each stage of crushing to obtain relatively ideal separation indexes.

[0004] Currently, the equipment commonly used for coarse crushing in open-pit magnetite mines is often a toothed roll crusher. For medium crushing and fine crushing, a cone crusher is generally used, and for four-stage ultra-fine crushing, a high-pressure roll mill is generally used. The current dry separation method is to set up independent dry separation workshops after each stage of crushing and perform dry separation through a dry separation belt conveyor. This fixed plant has a large investment, and it is difficult to reuse the equipment.

[0005] Currently, the mining areas of open-pit magnetite mines change year by year. If the integration of coarse crushing - rough separation, medium crushing - primary beneficiation, fine crushing - secondary beneficiation, and high-pressure roll milling - tertiary beneficiation can be achieved, and the integrated equipment can also be quickly relocated as the mining area changes, then the entire ore dressing processing facility can be fully relocated, which will enable the reuse of ore dressing equipment multiple times, greatly reduce the haulage distance of the mined ore, and greatly reduce the equipment purchase cost and production cost.

[0006] Currently, the products of many mines are transported by train, and the mine includes a railway system. If the four-stage crushing and dry separation processes can be integrated on an ore processing train, then the selected concentrate products can be directly transported away by the concentrate transportation train. In this way, the entire concentrate transportation train can also be arranged in the mining area, thus eliminating the need for belt conveying, stacking, and loading facilities for the concentrate, and greatly reducing the output cost of the concentrate.

[0007] This requires us to develop an integrated iron ore upgrading system that can integrate the four-stage crushing and dry separation operations of magnetite into a processing train, enabling direct loading of concentrate into trucks, and allowing the entire processing facility to be quickly relocated, so as to reduce equipment and plant investment, lower operating costs, and enable the reuse of the processing facility at different mines. Summary of the Invention

[0008] The object of the present invention is to provide an integrated iron ore upgrading system that can integrate the four-stage crushing and dry separation operations of magnetite into a processing train, enabling direct loading of concentrate into trucks, and allowing the entire processing facility to be quickly relocated, so as to reduce equipment and plant investment, lower operating costs, and enable the reuse of the processing facility at different mines.

[0009] To achieve the above object, the present invention is implemented by the following technical solutions:

[0010] An integrated iron ore upgrading system includes a primary crushing and rough separation module, an intermediate crushing and first-stage beneficiation module, a fine crushing and second-stage beneficiation module, a high-pressure roll and third-stage beneficiation module, a vehicle-mounted unit, and a bucket elevator. The vehicle-mounted unit is formed by connecting 4 sections of car body boxes in series. The primary crushing and rough separation module, the intermediate crushing and first-stage beneficiation module, the fine crushing and second-stage beneficiation module, and the high-pressure roll and third-stage beneficiation module are respectively connected to each section of the car body box, and can be laid flat on the upper end of the car body box or stand upright at the tail of the car body box under the traction drive of a hydraulic cylinder. A bucket elevator is fixed at the front end of each car body box. The primary crushing and rough separation module, the intermediate crushing and first-stage beneficiation module, the fine crushing and second-stage beneficiation module, and the high-pressure roll and third-stage beneficiation module respectively send iron-containing concentrate into the front-end bucket elevator through a belt conveyor, and then the bucket elevator feeds the material to the front-end crushing and beneficiation module.

[0011] The belt conveyor can be fixed on the upper end of the car body box and can be folded and suspended on the side of the car body box.

[0012] The primary crushing and rough separation module includes a primary crushing and rough separation frame, a pair of toothed roll crushers, a magnetic separation unit, a feeding trough, a discharge hopper for the primary crushing unit, a concentrate discharge chute, and a waste rock discharge chute. The pair of toothed roll crushers, the magnetic separation unit, the feeding trough, the discharge hopper for the primary crushing unit, the concentrate discharge chute, and the waste rock discharge chute are installed in the primary crushing and rough separation frame. The primary crushing and rough separation frame is hinged to the tail of the car body box and is traction-driven by a hydraulic cylinder. The pair of toothed roll crushers are above the feeding trough and are connected to the feeding trough through the discharge hopper for the primary crushing unit. The magnetic separation unit is symmetrically arranged on both sides inside the feeding trough. The concentrate discharge chute is below the magnetic separation unit. The waste rock discharge chute is between the two concentrate discharge chutes.

[0013] The magnetic separation unit includes a magnetic separation plate, a redirecting roller, a driving roller, and a conveyor belt. The magnetic separation plate is vertically arranged, and its upper and lower ends are fixedly connected to the box body of the feeding trough through non-magnetic folding plates. The end of the non-magnetic folding plate is provided with a redirecting roller. The conveyor belt is wound around the magnetic separation plate, the redirecting roller, and the driving roller. The magnetic separation plate is of a permanent magnet system with a magnetic field intensity of 500 mT - 600 mT.

[0014] The first-stage medium crushing and beneficiation module includes a first-stage medium crushing and beneficiation frame, a cone crusher, a magnetic separation unit, a first-stage concentrate discharge chute, and a first-stage waste rock discharge chute. The cone crusher, the magnetic separation unit, the first-stage concentrate discharge chute, and the first-stage waste rock discharge chute are installed in the first-stage medium crushing and beneficiation frame. The first-stage medium crushing and beneficiation frame is hinged to the tail of the car body box and is driven by the traction of a hydraulic cylinder. The cone crusher and the magnetic separation unit are arranged vertically. The magnetic separation unit includes a fixed outer ring surface, a rotating inner ring surface, an inner ring top plate, and a ring-shaped magnetic separator I. The inner ring top plate is fixed to the upper end of the rotating inner ring surface. The fixed outer ring surface is outside the rotating inner ring surface, and the fluid channel formed between the fixed outer ring surface and the rotating inner ring surface is communicated with the annular feeding chute of the cone crusher. The ring-shaped magnetic separator I is inside the rotating inner ring surface. The ring-shaped magnetic separator I is a 330° ring. The first-stage waste rock discharge chute is at the bottom of the fluid channel formed between the fixed outer ring surface and the rotating inner ring surface corresponding to the 330° ring surface of the ring-shaped magnetic separator I. The first-stage concentrate discharge chute is at the bottom of the fluid channel formed between the fixed outer ring surface and the rotating inner ring surface corresponding to the 30° vacancy of the ring-shaped magnetic separator. The fixed outer ring surface, the rotating inner ring surface, and the ring-shaped magnetic separator I are all conical with a smaller upper end and a larger lower end and are coaxially arranged. The rotating inner ring surface and the inner ring top plate can rotate. The ring-shaped magnetic separator I is a permanent magnet with a magnetic field intensity of 400 mT - 500 mT.

[0015] The fine crushing and secondary beneficiation module includes a fine crushing and secondary beneficiation frame, a cone crusher, a magnetic separation unit, a secondary beneficiation ore discharge hopper, and a secondary beneficiation waste rock discharge hopper. The cone crusher, the magnetic separation unit, the secondary beneficiation ore discharge hopper, and the secondary beneficiation waste rock discharge hopper are installed in the fine crushing and secondary beneficiation frame. The fine crushing and secondary beneficiation frame is hinged to the tail of the car body box and is driven by a hydraulic cylinder. The cone crusher and the magnetic separation unit are arranged vertically. The magnetic separation unit includes a secondary beneficiation feed hopper and a ring-shaped magnetic separator II. The ring-shaped magnetic separator II is concentrically placed inside the secondary beneficiation feed hopper. The top of the ring-shaped magnetic separator II is closed and can be driven to rotate by a motor. A number of electromagnetic curved panels are evenly arranged in a circumferential splicing manner on the outer surface of the ring-shaped magnetic separator II. A spring contact is provided at the bottom of each electromagnetic curved panel, and the spring contact contacts the ring-shaped current collector ring. The ring-shaped current collector ring is arranged at 330° circumferentially. The bottom of the secondary beneficiation feed hopper corresponding to the 30° vacant area of the ring-shaped current collector ring is the secondary beneficiation ore discharge hopper, and the bottom of the secondary beneficiation feed hopper corresponding to the 330° area of the ring-shaped current collector ring is the secondary beneficiation waste rock discharge hopper. Both the secondary beneficiation feed hopper and the ring-shaped magnetic separator II are conical with a smaller upper end and a larger lower end.

[0016] The outside of the electromagnetic curved panel is lined with wear-resistant rubber. The ring-shaped current collector ring is provided with a current receiving groove of 5 - 10 mm. The current receiving groove is directly below the spring contact, and the two sides of the current receiving groove are insulating rubber. The magnetic field intensity of the electromagnetic curved panel is 300 mT - 400 mT.

[0017] The high-pressure roll tertiary beneficiation module includes a high-pressure roll mill box body, high-pressure rolls, fan-shaped electromagnetic curved panels, connecting plates, fixed shafts, rotating bearings, ore discharge chutes, and waste rock discharge chutes. The high-pressure rolls are arranged in pairs in the high-pressure roll mill box body and are driven to rotate by a motor. A fixed shaft is arranged inside the roll cylinders of the high-pressure rolls. The fixed shaft is connected with fan-shaped electromagnetic curved panels through connecting plates. The fan-shaped electromagnetic curved panels in the two roll cylinders are arranged in a mirror image. The fan-shaped electromagnetic curved panels face the side of the material flow. The roll cylinders of the high-pressure rolls are connected to the fixed shafts through rotating bearings. Ball bearings are arranged between the rotating bearings and the fixed shafts. The ore discharge chutes are at the bottoms on both sides of the two roll cylinders and outside the area of the fan-shaped electromagnetic curved panels, and the waste rock discharge chutes are at the bottoms between the two roll cylinders and inside the area of the fan-shaped electromagnetic curved panels.

[0018] The magnetic field intensity of the fan-shaped electromagnetic curved panel is 150 - 250 mT.

[0019] It further includes a concentrate conveying train. The concentrate conveying train is perpendicular to the vehicle-mounted unit. The concentrate conveying train is in front of the high-pressure roll tertiary beneficiation module. The high-pressure roll tertiary beneficiation module feeds materials to the concentrate conveying train through a bucket elevator.

[0020] Compared with the existing technology, the beneficial effects of the present invention are:

[0021] 1) The system of the present invention integrates coarse crushing and rough concentration into one machine, medium crushing and primary concentration into one machine, fine crushing and secondary concentration into one machine, and high-pressure roll grinding and tertiary concentration into one machine, thus achieving a high degree of integration of the modules of coarse crushing - rough concentration - medium crushing - primary concentration - fine crushing - secondary concentration - high-pressure roll grinding - tertiary concentration. Finally, the particle size of the product is reduced to about 5 mm after fine crushing, greatly increasing the dissociation of ore and gangue. And through the methods of rough concentration - primary concentration - secondary concentration - tertiary concentration, by means of four-stage separation with decreasing field intensity, in the first three separations, the gangue and surrounding rock that hardly contain magnetite are removed by high field intensity, ensuring the recovery rate of magnetic iron; in the tertiary concentration, a lower field intensity is adopted to remove the gangue dissociated in the high-pressure roll grinding product and the ore-gangue intergrowth with less magnetic iron content to ensure the grade of the final product. After the processing of the low-to-medium grade raw ore with a grade of 35% - 40% by the above process, the final concentrate grade can reach 58% - 62%. Thus, through simple process and equipment integration, high-quality iron concentrate with high grade and recovery rate is obtained, with low cost and high efficiency.

[0022] 2) The rough concentration of the present invention uses a toothed roll crusher, and its discharge is strip-shaped discharge. The method of sandwich-type rough concentration can separate all the coarse crushing products, thus throwing out all the gangue and surrounding rock brought in by mining at the source, creating conditions for obtaining a higher concentrate grade in the subsequent concentration.

[0023] 3) The equipment of the process of the modules of coarse crushing - rough concentration - medium crushing - primary concentration - fine crushing - secondary concentration - high-pressure roll grinding - tertiary concentration of the present invention is integrated and arranged on a train after integration, so that it is not necessary to set up each crushing workshop and dry separation workshop contained in the traditional fixed plant, reducing the infrastructure investment.

[0024] 4) All the equipment of the process of the modules of coarse crushing - rough concentration - medium crushing - primary concentration - fine crushing - secondary concentration - high-pressure roll grinding - tertiary concentration of the present invention, including each belt conveyor and power unit, is integrated on the vehicle body, thus realizing the full mobility of the entire ore processing facility, so that the entire processing facility can be quickly relocated as the mining area changes, greatly reducing the conveying cost of the raw ore and the production cost.

[0025] 5) After the system of the present invention transports the four car body boxes to a new destination by train, the locomotive can drive away, thus realizing other uses of the locomotive and improving the utilization rate of the locomotive.

[0026] 6) The system of the present invention can feed the product into each carriage of the concentrate conveying train through the concentrate bucket elevator for concentration, thus eliminating the concentrate belt conveying and stacking facilities and reducing the investment and operation cost.

[0027] 7) The primary crushing - primary screening integration of the system of the present invention is integrated into one vehicle body, the secondary crushing - primary concentration integration is integrated into one vehicle body, the fine crushing - secondary concentration module is integrated into one vehicle body, and the high - pressure roll grinding - tertiary concentration is integrated into one vehicle body. With this way of unit - by - unit integration, each unit can be independently transported by train to other mines after the service in this mine and then combined, thus realizing the repeated utilization of equipment, improving the equipment utilization rate, and avoiding the sinking of assets.

[0028] 8) The primary - concentrated ore, the primary, secondary, and tertiary - concentrated ores of the system of the present invention use bucket elevators to achieve the vertical lifting of the ore, thus greatly reducing the distance between adjacent operation sections and creating conditions for integrating all facilities into a train.

[0029] 9) When the belt conveyor of the present invention is in transportation, it is suspended on the side of the vehicle. During operation, it is horizontally placed below the respective dry - separation discharge chutes. In this way, the positions of the belt conveyor and the integrated machine in the transportation state and the working state do not overlap, thus creating conditions for integrating all facilities into one train.

[0030] 10) The primary - crushing - primary - screening module integrates the primary - crushing counter - tooth roll crusher, the primary - screening unit, and the discharge unit from top to bottom on the same longitudinal gantry frame, forming an integrated modular layout of counter - tooth roll primary - crushing and primary - screening tailing discharge, thus creating the counter - tooth roll crushing - primary - screening module. This way has a high degree of integration, occupies a small area, and does not require setting up an additional independent primary - screening belt conveyor and primary - screening workshop, reducing equipment investment, workshop investment, and the operation and maintenance costs of the equipment.

[0031] 11) The secondary - crushing - primary - concentration module integrates the secondary - crushing cone crusher, the primary - concentration unit, and the discharge unit from top to bottom on the same longitudinal gantry frame, forming an integrated modular layout of secondary - crushing and primary - concentration tailing discharge, thus creating the secondary - crushing - primary - concentration module. This way also has a high degree of integration, occupies a small area, and does not require setting up an additional independent primary - screening belt conveyor and primary - screening workshop, reducing equipment investment, workshop investment, and the operation and maintenance costs of the equipment.

[0032] 12) The fine - crushing - secondary - concentration module integrates the fine - crushing cone crusher, the secondary - concentration unit, and the discharge unit from top to bottom on the same longitudinal gantry frame, forming an integrated modular layout of fine - crushing and secondary - concentration tailing discharge, thus creating the fine - crushing - secondary - concentration module. This way also has a high degree of integration, occupies a small area, and does not require setting up an additional independent primary - screening belt conveyor and primary - screening workshop, reducing equipment investment, workshop investment, and the operation and maintenance costs of the equipment.

[0033] 13) The high-pressure roll mill - three-stage beneficiation module of the present invention integrates the ultra-fine crushing high-pressure roll mill, the three-stage beneficiation unit, and the discharging unit from top to bottom on the same longitudinal gantry frame, forming an integrated modular layout of high-pressure roll milling and three-stage beneficiation, thus creating the high-pressure roll mill - three-stage beneficiation module. This method has a high degree of integration, occupies a small area, and does not require the setting of an additional independent three-stage beneficiation belt conveyor and workshop, reducing equipment investment, workshop investment, and equipment operation and maintenance costs.

[0034] 14) For the coarse crushing - rough beneficiation module of the device of the present invention, since the particle size of the ore fed is generally about 1000 mm and cannot be transported by a belt conveyor, a truck trestle is specifically set up and truck transportation is adopted. For the other three modules, since the particle size of the ore fed is relatively small, a bucket elevator is used for ore feeding. The above connection method has a compact structure and a simple layout, and smoothly realizes the compact ore feeding of the three modules.

[0035] 15) The system of the present invention integrates the entire coarse crushing - rough beneficiation module, medium crushing - first-stage beneficiation module, fine crushing - second-stage beneficiation module, and high-pressure roll mill - three-stage beneficiation module on a train car body through its gantry frame. By pushing the gantry frame with a hydraulic rod, the conversion between the horizontal transportation state and the vertical working state of the module can be realized, thus quickly realizing the transfer of the module from one mining area to another mining area and ensuring the high operation rate of the entire operation.

[0036] 16) When the coarse crushing - rough beneficiation module, medium crushing - first-stage beneficiation module, fine crushing - second-stage beneficiation module, and high-pressure roll mill - three-stage beneficiation module of the present invention are working, they are placed on the foundation through four circular ground anchors at their respective bottoms, and the car body is not stressed during operation, protecting the car body.

[0037] 17) In the system of the present invention, when the coarse crushing - rough beneficiation module, medium crushing - first-stage beneficiation module, fine crushing - second-stage beneficiation module, and high-pressure roll mill - three-stage beneficiation module break down, the coarse crushing - rough beneficiation module, medium crushing - first-stage beneficiation module, fine crushing - second-stage beneficiation module, and high-pressure roll mill - three-stage beneficiation module can be folded back to the horizontal state by using a hydraulic push rod. Each part of the coarse crushing - rough beneficiation module, medium crushing - first-stage beneficiation module, fine crushing - second-stage beneficiation module, and high-pressure roll mill - three-stage beneficiation module is bolted to each layer of the platform, and each layer of the platform is bolted to the gantry frame. By removing these bolt connections, the individual parts of the coarse crushing - rough beneficiation module, medium crushing - first-stage beneficiation module, fine crushing - second-stage beneficiation module, and high-pressure roll mill - three-stage beneficiation module can be vertically lifted out, thus realizing the rapid overhaul of each component part of the module.

[0038] 18) The rough beneficiation of the device of the present invention uses a sorting plate for rough beneficiation. Compared with the traditional sorting roller drum sorting, the present invention has a simple structure, a small weight, and a small investment.

[0039] 19) In the rough selection of the present invention, two mirror-symmetrical rough selection separation plates are arranged on both sides of the material flow, thus realizing the sandwich-type separation in the thickness direction of the material flow. This method is equivalent to each magnetic separation plate on one side only undertaking the non-rough selection of the material flow with a thickness of about 1 / 2, which greatly reduces the thickness of the material flow. The magnetic field intensity of the separation plate is 500 mT - 600 mT. The use of a relatively strong magnetic field intensity ensures the full recovery of magnetic iron minerals, thus greatly reducing the loss of magnetic iron during rough selection at the source. The recovery rate can reach over 95%, significantly optimizing the rough selection index.

[0040] 20) In the rough selection of the present invention, the adsorption of magnetic ore is formed on the vertical section of the separation plate by covering the separation plate with a conveyor belt, and the movement of the magnetic ore from the vertical direction to the near-horizontal direction is realized through an arc of 110° - 130°. Then, it is transported to the rear of the folding plate along with the conveyor belt and unloaded onto the ore side of the discharge part under the action of a single inertia. This method realizes the adsorption - turning - unloading of the ore, with a simple and practical structure and low manufacturing cost.

[0041] 21) The rough selection feed of the present invention is a product with a maximum particle size of 200 - 300 mm after coarse crushing, which reduces the weight of large ore blocks in the feed and avoids the loss of magnetic iron caused by the excessive weight of large magnetic ore blocks that cannot be adsorbed by the magnetic separation roller, thus ensuring the recovery rate of magnetic iron in the rough selection.

[0042] 22) In the rough selection of the present invention, the turning of the conveyor belt on the upper and lower sides of the separation plate is realized through deflector roller A and deflector roller B. This way of roller turning is beneficial to energy conservation and reduces the wear of the conveyor belt. The conveyor belt is short, so there is no need to set up intermediate brackets and idlers, reducing the manufacturing cost.

[0043] 23) The drive device for the rough selection of the device of the present invention can be frequency-converted and speed-regulated, so as to adjust the belt speed of the conveyor belt, and then 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 materials on both sides of the separation plate to ensure the recovery rate of magnetic iron in the rough selection concentrate to the greatest extent.

[0044] 24) In the first-stage beneficiation of the present invention, a rotary feeding inner ring surface and a fixed annular magnetic separator are adopted to achieve dry separation for the annular circumferential discharging of the medium-crushing cone crusher. Magnetic ores adhere to the outer side of the inner ring surface of the feeding hopper corresponding to the annular magnetic separator. As the inner ring surface of the feeding hopper rotates until it turns away from the corresponding area of the annular magnetic separator, the adsorbed ores are discharged into the ore discharging cavity of the lower discharging hopper; the waste rocks that are not magnetic and cannot be adsorbed on the inner ring surface of the feeding hopper are discharged into the waste rock discharging cavity of the lower discharging hopper. This structural method completes the separation and ore discharging with the vertical falling of the discharging of the cone crusher, featuring a compact structure, small occupied space, and low investment.

[0045] 25) The annular magnetic separator for the first-stage beneficiation of the present invention is of an annular structure, with a large magnetic separation area, which is beneficial to ensuring a high recovery rate of magnetic iron. Moreover, the circumferential angle of the cross-section of the magnetic separator is 330°, so that most of the circumference is used for magnetic separation, ensuring the separation effect. The remaining 30° non-magnetic separation area takes the feeding raw materials and the dry-separated ores together as ore products. Such a structure avoids the loss of magnetic minerals in the feeding raw materials in the non-magnetic separation area, thus ensuring the recovery rate of magnetic iron in magnetite and laying a foundation for high yields.

[0046] 26) The device of the present invention adopts the method of rotary magnetic separation in the first-stage beneficiation, making full use of the advantages of the large discharging area and thin material layer at the annular circumferential discharging port of the cone crusher, so that the distance between the material layer and the surface of the annular magnetic separator is close, the separation area is large, the separation effect is optimized, and the acquisition of high-yield iron concentrate products is ensured.

[0047] 27) The magnetic field intensity of the annular magnetic separator for the first-stage beneficiation of the present invention is 400 - 500 mt. Such a magnetic field intensity is sufficient to ensure the effective recovery of magnetic ores and further ensure the high recovery rate of magnetic iron in the rough separation products.

[0048] 28) The rotating motor of the inner ring surface of the feeding hopper for the first-stage beneficiation of the present invention is a variable-frequency speed-regulating motor, so that the separation time of the inner ring surface of the feeding hopper in the magnetic separation area can be adjusted, thus effectively controlling the separation effect.

[0049] 29) The annular magnetic separator for the first-stage beneficiation of the present invention is built inside the rotating inner ring surface. The annular magnetic separator does not directly contact the large-sized products in the medium crushing, effectively avoiding the smashing of the surface of the annular magnetic separator by large-sized ores and protecting the annular magnetic separator.

[0050] 30) The secondary beneficiation of the present invention adopts the method of a circular electromagnetic magnetic separator, realizing the dry separation of the circular circumferential discharging of the cone crusher. On the 330° circular separation curved surface, the magnetic ore adheres to the outer side of the circular magnetic separator. As the ring surface of the magnetic separator rotates, until it reaches the 30° non-magnetic ore discharging area, the adsorbed ore is discharged into the ore discharging hopper of the lower discharging hopper; the waste rock without magnetism that cannot be adsorbed on the separation surface of the circular magnetic separator is discharged into the lower waste rock discharging cavity. This structural method completes the separation and ore discharging along with the vertical falling of the discharging of the gyratory crusher. The structure is compact, occupies little space, and saves investment.

[0051] 31) The secondary beneficiation of the present invention realizes the re-separation of the ore in the 30° non-separation area during the first time, realizes the recovery of the magnetic ore in this part of the ore, and improves the final concentrate output and recovery rate.

[0052] 32) The circular magnetic separator of the secondary beneficiation of the present invention is of a circular body structure, with a large magnetic separation area, which is beneficial to ensuring a high recovery rate of magnetic separation of iron. And the cross-sectional circumferential angle of the magnetic separation area of the magnetic separator is 330°, so that most of the circumference is used for magnetic separation, ensuring the separation effect. The remaining 30° non-magnetic separation area takes the feeding raw materials and the selected ore together as ore products. Such a structure avoids the loss of magnetic minerals in the feeding raw materials in the non-magnetic separation area, thus ensuring the recovery rate of magnetic iron in magnetite and laying a foundation for the high income of the concentrator.

[0053] 33) The secondary beneficiation of the present invention adopts the method of rotary magnetic separation, making full use of the favorable conditions of the thin material layer and large separation area at the circular circumferential discharging port of the cone crusher, so that the distance between the material layer and the surface of the circular magnetic separator is close, thus preventing the situation that the field strength is too low due to too far distance and part of the ore cannot be adsorbed, avoiding the loss of part of the magnetite, and ensuring the income.

[0054] 34) For the secondary beneficiation of the present invention, the feeding hopper, the circular magnet, and the discharging hopper are all of a circular structure with a small upper opening and a large lower opening, and the busbar inclination angle is 75 - 85 degrees. This structure not only ensures a sufficient separation area, but also ensures a sufficient separation distance for the material to roll longitudinally downward on the circular surface. During the rolling process, the gradually separated waste rock is separated, thus gradually improving the grade of the concentrate and ensuring the obtaining of high-grade concentrate products.

[0055] 35) The middle of the power connection board of the secondary beneficiation of the present invention is a power connection groove with a width of only 5 - 10 mm, and both sides are insulating rubber. The power connection switch is a spring-type contact quick switch, that is, after the contact touches the power connection board, the spring compresses to energize the electromagnetic board to magnetize the electromagnetic board. This power connection method has rapid power-on and power-off, and eliminates the danger of electric shock, ensuring safety.

[0056] 36) For the secondary beneficiation of the present invention, the toroidal angle occupied by each sorting curved panel is 10°-20°. After the magnetic minerals are adsorbed and sorted by energizing and magnetizing in the sorting area, these sorting curved panels enter the unloading area with a toroidal angle of 30° one by one as the magnetic separator rotates. At this time, since there is no energized ring below, the electromagnetic curved panels are demagnetized one by one, and the adsorbed magnetic minerals are unloaded. This way forms a continuous sorting-unloading operation for each sorting curved panel, with high processing efficiency.

[0057] 37) The magnetic field strength of the secondary sorting curved panel of the present invention can be adjusted between 300-400 mT by controlling the magnitude of the input current, so as to realize the control and adjustment of the magnetic force adsorption of the ore; the variable frequency speed regulation of the rotating motor of the magnetic separator realizes the adjustment of the sorting time of the ore in the sorting area, and can also realize the control and adjustment of the sorting time. Thus, the adjustment and control of the sorting magnetic force and the sorting time are realized, ensuring the obtaining of high-index sorted ore products.

[0058] 38) The outer side of the magnetic separator of the secondary beneficiation of the present invention is lined with wear-resistant rubber of 20-30 mm, which effectively guarantees the service life of the magnetic separator.

[0059] 39) The clamping electromagnetic curved panel of the tertiary beneficiation of the present invention is built into the roller barrels of the fixed roller and the moving roller, thus integrating the tertiary beneficiation with the high-pressure roller mill. This eliminates the need to set up separate tertiary beneficiation equipment and workshops, greatly saving equipment and infrastructure investment.

[0060] 40) The feed for the tertiary beneficiation of the present invention is dry materials with a maximum particle size of about 5 mm. The fine particle content in the fine particle materials produced by high-pressure roller mill ultra-fine crushing is large and the dissociation is good, providing a guarantee for obtaining high-grade concentrate products by large-scale tailing rejection. Moreover, the dry magnetic separation method eliminates a large number of pulp transportation links compared with wet magnetic separation, further playing an energy-saving role.

[0061] 41) After the materials for the tertiary beneficiation of the present invention are crushed by being extruded through the gap between the driving roller and the driven roller, the magnetic ore is immediately adsorbed on the surface of the roller barrel by the magnetic force of the electromagnetic curved panel built into the lower part of the two rollers during the falling process. After passing over the lowest edge of the roller barrel, it leaves the magnetic separation area and naturally falls into the ore discharge hopper below the pair of rollers and is discharged, while the waste rock is discharged from the waste rock discharge hopper in the middle. This structural method realizes the functional integration of crushing and dry separation in the high-pressure roller mill, and realizes the direct preselection of the high-pressure roller mill products at its discharge. This way has a compact structure and continuous functions.

[0062] 42) The electromagnetic curved panels of the third-stage beneficiation of the present invention are symmetrically mirror-arranged, realizing the clamping-type magnetic separation of broken products. That is, the electromagnetic curved panel on one side only undertakes the preliminary selection of the material flow with a thickness of 1 / 2, which avoids the attenuation of the magnetic field strength in the width direction of the material flow during the iron removal on one side, resulting in the situation that the magnetic iron ore at the boundary of the material flow cannot be adsorbed. Therefore, the clamping-type iron removal method of the present invention has a high recovery rate of magnetic iron.

[0063] 43) The magnetic field strength of the electromagnetic curved panel of the present invention is 150 mT - 250 mT. Such a magnetic field strength can ensure that most of the low-grade associated minerals and gangue are discarded together, and the magnetic field strength can also be adjusted by adjusting the current according to the change of the feeding properties to optimize the preliminary selection effect, so as to ensure that the concentrate grade can reach 58% - 62%.

[0064] 44) The control signal of the hydraulic push rod, the frequency conversion signal of the rough selection drive motor, the start-stop and frequency conversion signals of the magnetic separation body rotation motors for the first-stage and second-stage beneficiation, the current intensity signal of the power connection board for the second-stage beneficiation, and the current signal of the electromagnetic curved panel for the third-stage beneficiation of the present invention are all connected to the control system, with a high degree of automation. Description of the Drawings

[0065] Figure 1 It is a schematic diagram of the overall structure when the present invention is in the working state.

[0066] Figure 2 It is a schematic diagram of the structure when the present invention is in the carrying state.

[0067] Figure 3 It is a schematic diagram of the structure of the coarse crushing and rough selection module of the present invention (A - A).

[0068] Figure 4 It is a schematic diagram of the structure of the medium crushing and first-stage beneficiation module of the present invention (B - B).

[0069] Figure 5 It is a top view of the first-stage beneficiation magnetic separation unit.

[0070] Figure 6 It is a top view of the fixed inner ring surface of the first-stage beneficiation magnetic separation unit.

[0071] Figure 7 It is a top view of the rotating inner ring surface of the first-stage beneficiation magnetic separation unit.

[0072] Figure 8 It is a top view of the annular magnetic separation body Ⅰ of the first-stage beneficiation magnetic separation unit.

[0073] Figure 9 It is a top view of the discharge chute inlet of the first-stage beneficiation magnetic separation unit.

[0074] Figure 10It is a schematic structural diagram (C-C) of the fine secondary selection module of the present invention.

[0075] Figure 11 It is a top view of the secondary selection magnetic separation unit.

[0076] Figure 12 It is a top view of the secondary selection magnetic separation feed hopper.

[0077] Figure 13 It is a top view of the annular magnetic separator II of the secondary selection magnetic separation unit.

[0078] Figure 14 It is a schematic structural diagram of the electromagnetic curved panel contact switch of the secondary selection magnetic separation unit.

[0079] Figure 15 It is a schematic structural diagram (D-D) of the high-pressure roll tertiary selection module of the present invention.

[0080] Figure 16 It is a partial enlarged view of the high-pressure roll tertiary selection part.

[0081] Figure 17 It is a top view when the concentrate conveying train is arranged.

[0082] In the figure: 1 - Coarse crushing and rough selection module, 2 - Medium crushing and first-stage fine selection module, 3 - Fine crushing and second-stage fine selection module, 4 - High-pressure roll and third-stage fine selection module, 5 - Concentrate conveying train, 6 - Train, 7 - Coarse crushing and rough selection frame, 8 - Medium crushing and first-stage fine selection frame, 9 - Fine crushing and second-stage fine selection frame, 10 - High-pressure roll and third-stage fine selection frame, 11 - Counter-rotating roll crusher housing, 12 - Counter-rotating roll, 13 - Counter-rotating roll crusher drive unit, 14 - Medium crushing main machine housing, 15 - Moving cone I, 16 - Cone crusher drive unit I, 17 - Fine crushing main machine housing, 18 - Moving cone II, 19 - Cone crusher drive unit II, 20 - High-pressure roller mill housing, 21 - High-pressure roller mill, 22 - High-pressure roller mill drive unit, 23 - Coarse crushing and rough selection module car body box, 24 - Medium crushing and first-stage fine selection module car body box, 25 - Fine crushing and second-stage fine selection module car body box, 26 - High-pressure roll and third-stage fine selection module car body box, 27 - Rotating shaft A on both sides of the car body, 28 - Rotating shaft A on both sides of the module gantry frame, 29 - Hydraulic push rod A, 30 - Rotating shaft B on both sides of the car body, 31 - Rotating shaft B on both sides of the module gantry frame, 32 - Hydraulic push rod B, 33 - Rotating shaft C on both sides of the car body, 34 - Rotating shaft C on both sides of the module gantry frame, 35 - Hydraulic push rod C; 36 - Rotating shaft D on both sides of the car body, 37 - Rotating shaft D on both sides of the module gantry frame, 38 - Hydraulic push rod D, 39 - Rotating shaft A at the tail of the module gantry frame, 40 - Rotating shaft B at the tail of the module gantry frame, 41 - Rotating shaft C at the tail of the module gantry frame, 42 - Rotating shaft D at the tail of the module gantry frame, 43 - Rough selection concentrate belt conveyor, 44 - Support A, 45 - Hanging rod A, 46 - Hanging shaft A, 47 - First-stage fine selection concentrate belt conveyor, 48 - Support B, 49 - Hanging rod B, 50 - Hanging shaft B, 51 - Second-stage fine selection concentrate belt conveyor, 52 - Support C, 53 - Hanging rod C, 54 - Hanging shaft C, 55 - Third-stage fine selection concentrate belt conveyor, 56 - Support D, 57 - Hanging rod D, 58 - Hanging shaft D, 59 - Rough selection concentrate bucket elevator, 60 - First-stage fine selection concentrate bucket elevator, 61 - Second-stage fine selection concentrate bucket elevator, 62 - Third-stage fine selection concentrate bucket elevator, 63 - Discharge chute of the rough selection concentrate bucket elevator, 64 - Discharge chute of the first-stage fine selection concentrate bucket elevator, 65 - Discharge chute of the second-stage fine selection concentrate bucket elevator, 66 - Discharge chute of the third-stage fine selection concentrate bucket elevator, 67 - Feeding hopper of the rough selection bucket conveyor, 68 - Feeding hopper of the first-stage fine selection bucket conveyor, 69 - Feeding hopper of the second-stage fine selection bucket conveyor, 70 - Feeding hopper of the third-stage fine selection bucket conveyor, 71 - Rough selection waste rock transfer belt conveyor, 72 - First-stage fine selection waste rock transfer belt conveyor, 73 - Second-stage fine selection waste rock transfer belt conveyor, 74 - Third-stage fine selection waste rock transfer belt conveyor, 75 - Hydraulic power unit, 76 - Control box, 77 - Compartment of the concentrate conveying train, 78 - Truck trestle, 79 - Feeding platform of the counter-rotating roll crusher, 80 - Foundation platform of the counter-rotating roll crusher, 81 - Rough selection platform, 82 - Rough selection discharge platform, 83 - Ground anchor, 84 - Drive unit support of the counter-rotating roll crusher, 85 - Feeding chute86 - Coarse crushing unit discharge hopper, 87 - Magnetic separation plate, 88 - Driving roller, 89 - Conveyor belt, 90 - Driving device for driving roller, 91 - Redirecting roller A, 92 - Redirecting roller B, 93 - Base of driving roller cylinder and driving unit, 94 - Concentrate discharge chute of rough selection unit A, 95 - Waste rock discharge chute, 96 - Concentrate discharge chute of rough selection unit B, 97 - Feeding platform for medium crushing cone crusher, 98 - Foundation platform for medium crushing cone crusher, 99 - Rough selection platform and discharge platform, 100 - Feeding platform, 101 - Support for driving part of primary beneficiation cone crusher, 102 - Support for primary beneficiation crusher, 104 - Primary beneficiation feeding hopper, 105 - Ring magnetic separator I, 107 - Support outside the feeding hopper, 108 - Fixed outer ring surface, 109 - Rotating inner ring surface, 110 - Inner ring top plate, 111 - Rotating central axis I, 112 - Bearing support I, 113 - Primary beneficiation waste rock discharge hopper, 114 - Primary beneficiation ore discharge hopper, 115 - Waste rock discharge port, 116 - Ore discharge port, 117 - Feeding platform for cone crusher, 118 - Foundation platform for cone crusher, 119 - Secondary beneficiation platform, 120 - Secondary beneficiation discharge platform, 122 - Support for driving part of secondary beneficiation cone crusher, 123 - Support for secondary beneficiation crusher, 124 - Secondary beneficiation feeding hopper, 125 - Base of feeding hopper, 126 - Ring magnetic separator II, 127 - Circular top plate, 128 - Rotating central axis II, 129 - Lower base, 130 - Variable frequency rotating motor, 131 - Bearing seat II, 132 - Ring body support, 133 - Electromagnetic curved panel, 134 - Contact switch, 135 - Ring-shaped power connection ring, 136 - Power connection groove, 137 - Secondary beneficiation ore discharge hopper, 138 - Secondary beneficiation waste rock discharge hopper, 139 - Feeding platform for high pressure roller mill, 140 - Foundation platform for high pressure roller mill, 141 - Hopper foundation platform, 142 - Tertiary beneficiation discharge platform, 144 - Sector-shaped electromagnetic curved panel, 145 - Connecting plate, 146 - Fixed shaft, 147 - Rotating bearing, 148 - Inner ring surface of roller, 149 - Inner ring surface of rotating bearing, 150 - Ball, 151 - End face of roller, 152 - Driving shaft, 153 - Discharge box, 154 - Partition plate, 155 - Ore discharge chute, 156 - Waste rock discharge chute. Detailed implementation manners

[0083] The following further describes the detailed implementation manners of the present invention with reference to the accompanying drawings.

[0084] See Figures 1 - 17As shown in the figure, an integrated iron ore upgrading system includes a primary crushing and rough separation module 1, an intermediate crushing and first-stage beneficiation module 2, a fine crushing and second-stage beneficiation module 3, a high-pressure roll third-stage beneficiation module 4, a vehicle-mounted unit, and a bucket elevator. The vehicle-mounted unit is formed by connecting 4 sections of car body boxes in series. The primary crushing and rough separation module 1, the intermediate crushing and first-stage beneficiation module 2, the fine crushing and second-stage beneficiation module 3, and the high-pressure roll third-stage beneficiation module 4 are respectively connected to each section of the car body box, and can be laid flat on the upper end of the car body box or stand upright at the tail of the car body box under the traction drive of a hydraulic cylinder. A bucket elevator is fixed at the front end of each car body box. The primary crushing and rough separation module 1, the intermediate crushing and first-stage beneficiation module 2, the fine crushing and second-stage beneficiation module 3, and the high-pressure roll third-stage beneficiation module 4 respectively send iron-containing concentrate into the front-end bucket elevator through a belt conveyor, and then the bucket elevator feeds the material to the front-end crushing and beneficiation module.

[0085] The belt conveyor can be fixed to the upper end of the car body box and can be folded and suspended on the side of the car body box.

[0086] The primary crushing and rough separation module 1 includes a primary crushing and rough separation frame 7, a pair of toothed roll crushers, a magnetic separation unit, a feeding chute 85, a discharge hopper 86 of the primary crushing unit, a concentrate discharge chute, and a waste rock discharge chute 95. The pair of toothed roll crushers, the magnetic separation unit, the feeding chute 85, the discharge hopper 86 of the primary crushing unit, the concentrate discharge chute, and the waste rock discharge chute 95 are installed in the primary crushing and rough separation frame 7. The primary crushing and rough separation frame 7 is hinged to the tail of the car body box and is traction-driven by a hydraulic cylinder. The pair of toothed roll crushers are above the feeding chute 85 and are connected to the feeding chute 85 through the discharge hopper 86 of the primary crushing unit. The magnetic separation unit is symmetrically arranged on both sides inside the feeding chute 85. The concentrate discharge chute is below the magnetic separation unit. The waste rock discharge chute 9 is between the two concentrate discharge chutes.

[0087] The magnetic separation unit includes a magnetic separation plate 87, a redirecting roll, a driving roll 88, and a conveyor belt 89. The magnetic separation plate 87 is vertically arranged, and the upper and lower ends are fixedly connected to the box body of the feeding chute 85 through non-magnetic folding plates. The end of the non-magnetic folding plate is provided with a redirecting roll. The conveyor belt 89 is wound around the magnetic separation plate 87, the redirecting roll, and the driving roll 88. The magnetic separation plate 87 is a permanent magnet system with a magnetic field intensity of 500mT - 600mT.

[0088] The first-stage medium crushing and beneficiating module 2 includes a first-stage medium crushing and beneficiating frame 8, a cone crusher, a magnetic separation unit, a first-stage concentrate discharge chute 114, and a first-stage waste rock discharge chute 113. The cone crusher, the magnetic separation unit, the first-stage concentrate discharge chute 114, and the first-stage waste rock discharge chute 113 are installed in the first-stage medium crushing and beneficiating frame 8. The first-stage medium crushing and beneficiating frame 8 is hinged to the tail of the car body box and is traction-driven by a hydraulic cylinder. The cone crusher and the magnetic separation unit are arranged vertically. The magnetic separation unit includes a fixed outer ring surface 108, a rotating inner ring surface 109, an inner ring top plate 110, and a ring-shaped magnetic separator I 105. The inner ring top plate 110 is fixed to the upper end of the rotating inner ring surface 109. The fixed outer ring surface 108 is outside the rotating inner ring surface 109. The fluid channel formed between the fixed outer ring surface 108 and the rotating inner ring surface 109 is communicated with the annular feeding chute of the cone crusher. The ring-shaped magnetic separator I 105 is inside the rotating inner ring surface 109. The ring-shaped magnetic separator I 105 is a 330° ring. The first-stage waste rock discharge chute 113 is at the bottom of the fluid channel formed between the fixed outer ring surface 108 and the rotating inner ring surface 109 corresponding to the 330° ring surface of the ring-shaped magnetic separator I 105. The first-stage concentrate discharge chute 114 is at the bottom of the fluid channel formed between the fixed outer ring surface 108 and the rotating inner ring surface 109 corresponding to the 30° vacancy of the ring-shaped magnetic separator I 105. The fixed outer ring surface 108, the rotating inner ring surface 109, and the ring-shaped magnetic separator I 105 are all conical with a smaller upper end and a larger lower end and are coaxially arranged. The rotating inner ring surface 109 and the inner ring top plate 110 can rotate. The ring-shaped magnetic separator I 105 is a permanent magnet with a magnetic field intensity of 400 mT - 500 mT.

[0089] The fine crushing and secondary beneficiation module 3 includes a fine crushing and secondary beneficiation frame 9, a cone crusher, a magnetic separation unit, a secondary beneficiation ore discharge hopper 137, and a secondary beneficiation waste rock discharge hopper 138. The cone crusher, the magnetic separation unit, the secondary beneficiation ore discharge hopper 137, and the secondary beneficiation waste rock discharge hopper 138 are installed in the fine crushing and secondary beneficiation frame 9. The fine crushing and secondary beneficiation frame 9 is hinged to the tail of the car body box and is traction-driven by a hydraulic cylinder. The cone crusher and the magnetic separation unit are arranged one above the other. The magnetic separation unit includes a secondary beneficiation feed hopper 124 and an annular magnetic separator II 126. The annular magnetic separator II 126 is concentrically placed inside the secondary beneficiation feed hopper 124. The top of the annular magnetic separator II 126 is closed and can be driven to rotate by a motor. A plurality of electromagnetic curved panels 133 are evenly arranged in a circumferential splicing manner on the outer surface of the annular magnetic separator II 126. A spring contact is provided at the bottom of each electromagnetic curved panel 133, and the spring contact contacts an annular electrical connection ring 135. The annular electrical connection ring 135 is arranged at 330° in the circumferential direction. The bottom of the secondary beneficiation feed hopper 124 corresponding to the 30° vacant area of the annular electrical connection ring 135 is the secondary beneficiation ore discharge hopper 137, and the bottom of the secondary beneficiation feed hopper 124 corresponding to the 330° area of the annular electrical connection ring 135 is the secondary beneficiation waste rock discharge hopper 138. Both the secondary beneficiation feed hopper 124 and the annular magnetic separator II 126 are tapered with a smaller upper end and a larger lower end.

[0090] The outside of the electromagnetic curved panel 133 is lined with wear-resistant rubber. An electrical connection groove 136 with a depth of 5 - 10 mm is provided inside the annular electrical connection ring 135. The electrical connection groove 136 is directly below the spring contact. Insulating rubber is provided on both sides of the electrical connection groove. The magnetic field intensity of the electromagnetic curved panel 133 is 300 mT - 400 mT.

[0091] The high-pressure roll tertiary beneficiation module 4 includes a high-pressure roll mill box body 20, high-pressure rolls 21, sector-shaped electromagnetic curved panels 144, connecting plates 145, fixed shafts 146, rotating bearings 147, an ore discharge chute 155, and a waste rock discharge chute 156. The high-pressure rolls 21 are arranged in pairs in the high-pressure roll mill box body 20. The high-pressure rolls 21 are driven to rotate by a motor. A fixed shaft 146 is provided inside the roll cylinder of the high-pressure roll 21. The fixed shaft 146 is connected with a sector-shaped electromagnetic curved panel 144 through a connecting plate 145. The sector-shaped electromagnetic curved panels 144 in the two roll cylinders are arranged in a mirror image. The sector-shaped electromagnetic curved panel 144 faces the material flow side. The roll cylinder of the high-pressure roll 21 is connected to the fixed shaft 146 through a rotating bearing 147. A ball 150 is provided between the rotating bearing 147 and the fixed shaft 146. The ore discharge chute 155 is at the bottom on both sides of the two roll cylinders and outside the area of the sector-shaped electromagnetic curved panel 144, and the waste rock discharge chute 156 is at the bottom between the two roll cylinders and inside the area of the sector-shaped electromagnetic curved panel 144.

[0092] The magnetic field intensity of the sector electromagnetic curved panel is 150 - 250 mT.

[0093] It further includes a concentrate conveying train, which is perpendicularly arranged with respect to the vehicle-mounted unit. The concentrate conveying train is in front of the high-pressure roll three-stage beneficiation module, and the high-pressure roll three-stage beneficiation module feeds materials to the concentrate conveying train through a bucket elevator.

[0094] The crusher of the primary crushing and rough beneficiation module 1 uses a pair of toothed roll crushers, which consists of a pair of toothed roll crusher box 11, a pair of toothed rolls 12, and a pair of toothed roll crusher transmission part 13. The crushing unit of the secondary crushing and primary beneficiation module 2 uses a traditional cone crusher, which consists of a secondary crushing main machine housing 14, a moving cone Ⅰ 15, and a cone crusher transmission part Ⅰ 16. The crushing unit of the fine crushing and secondary beneficiation module 3 uses a traditional cone crusher, which consists of a fine crushing main machine housing 17, a moving cone Ⅱ 18, and a cone crusher transmission part Ⅱ 19. The main components of the high-pressure roll mill of the high-pressure roll mill three-stage beneficiation module 4 consist of a high-pressure roll mill box 20, a high-pressure roll mill 21, and a high-pressure roll mill transmission part 22.

[0095] The vehicle-mounted unit is composed of a primary crushing and rough beneficiation module car body box 23, a secondary crushing and primary beneficiation module car body box 24, a fine crushing and secondary beneficiation module car body box 25, and a high-pressure roll mill three-stage beneficiation module car body box 26 that are connected in series starting from the tail direction and towed by a train 6. Above the two sides of the primary crushing and rough beneficiation module car body box 23, there are hydraulic push rods A29 hinged to the rotating shafts A 27 on both sides of the car body and the rotating shafts A28 on both sides of the portal frame of the module; above the two sides of the secondary crushing and primary beneficiation module car body box 24, there are hydraulic push rods B32 hinged to the rotating shafts B30 on both sides of the car body and the rotating shafts B31 on both sides of the portal frame of the module; above the two sides of the fine crushing and secondary beneficiation module car body box 25, there are hydraulic push rods C35 hinged to the rotating shafts C33 on both sides of the car body and the rotating shafts C34 on both sides of the portal frame of the module; above the two sides of the high-pressure roll mill three-stage beneficiation module car body box 26, there are hydraulic push rods D38 hinged to the rotating shafts D36 on both sides of the car body and the rotating shafts D37 on both sides of the portal frame of the module. The tail of the primary crushing and rough beneficiation module car body box 23 is hinged to the rotating shaft A39 at the tail of the portal frame of the module; the tail of the secondary crushing and primary beneficiation module car body box 24 is hinged to the rotating shaft B40 at the tail of the portal frame of the module; the tail of the fine crushing and secondary beneficiation module car body box 25 is hinged to the rotating shaft C41 at the tail of the portal frame of the module; the tail of the high-pressure roll mill three-stage beneficiation module car body box 26 is hinged to the rotating shaft D42 at the tail of the portal frame of the module.

[0096] On each side of the car body of the coarse crushing and rough selection module 23, there is a rough selection concentrate belt conveyor 43. After the two rough selection concentrate belt conveyors 43 are hung on the longitudinal hanging shafts A46 on the side of the car body through the hanging rods A45 arranged at equal intervals on their lower brackets A44, they are horizontally suspended on one side of the car body. On one side of the car body of the medium crushing and first selection module 24, there is a first concentrate belt conveyor 47. After the first concentrate belt conveyor 47 is hung on the longitudinal hanging shaft B50 on the side of the car body through the hanging rods B49 arranged at equal intervals on its lower bracket B48, it is horizontally suspended on one side of the car body. On one side of the car body of the fine crushing and second selection module 25, there is a second concentrate belt conveyor 51. After the second concentrate belt conveyor 51 is hung on the longitudinal hanging shaft C54 on the side of the car body through the hanging rods C53 arranged at equal intervals on its lower bracket C52, it is horizontally suspended on one side of the car body. On each side of the car body of the high pressure roll grinding and third selection module 26, there is a third concentrate belt conveyor 55. After the two third concentrate belt conveyors 55 are hung on the longitudinal hanging shafts D58 on the side of the car body through the hanging rods D57 arranged at equal intervals on their lower brackets D56, they are horizontally suspended on one side of the car body respectively.

[0097] Vertically arranged outside the head of the car body of the coarse crushing and rough selection module 23 is a rough selection concentrate bucket elevator 59. Vertically arranged outside the head of the car body of the medium crushing and first selection module 24 is a first concentrate bucket elevator 60. Vertically arranged outside the head of the car body of the fine crushing and second selection module 25 is a second concentrate bucket elevator 61. Vertically arranged outside the head of the car body of the high pressure roll grinding and third selection module 26 is a third concentrate bucket elevator 62. The discharge chute 63 of the rough selection concentrate bucket elevator is located above the feed platform 97 of the medium crushing cone crusher in the working state. The discharge chute 64 of the first concentrate bucket elevator is located above the feed platform 117 of the cone crusher in the working state. The discharge chute 65 of the second concentrate bucket elevator is located above the high pressure roll grinding feed platform 139. The discharge chute 66 of the third concentrate bucket elevator is located above the concentrate conveying train carriage 77.

[0098] In the working state, the tails of the rough selection concentrate belt conveyor 43, the first concentrate belt conveyor 47, the second concentrate belt conveyor 51, and the third selection concentrate belt conveyor 55 are respectively located below the concentrate chutes of each stage of crushing. The head of the rough selection belt conveyor 43 is located above the receiving hopper 67 of the rough selection bucket conveyor. The head of the first concentrate belt conveyor 47 is located above the receiving hopper 68 of the first concentrate bucket conveyor. The head of the second concentrate belt conveyor 51 is located above the receiving hopper 69 of the second concentrate bucket conveyor. The head of the third concentrate belt conveyor 55 is located above the receiving hopper 70 of the third concentrate bucket conveyor.

[0099] The waste rocks from roughing, primary cleaning, secondary cleaning and tertiary cleaning are discharged through their waste rock discharge chutes into the independently arranged roughing waste rock transfer belt conveyor 71, primary cleaning waste rock transfer belt conveyor 72, secondary cleaning waste rock transfer belt conveyor 73 and tertiary cleaning waste rock transfer belt conveyor 74 below.

[0100] The rougher concentrate belt conveyor 43, primary concentrate belt conveyor 47, secondary concentrate belt conveyor 51, and tertiary concentrate belt conveyor 55 are bolted to the carriage when in operation. Hydraulic power units 75 are installed beneath the carriages of the coarse crushing and roughing module 1, the secondary crushing and primary concentrating module 2, the fine crushing and secondary concentrating module 3, and the high-pressure roller grinding and tertiary concentrating module. The control signals of the hydraulic push rods are connected to a control box 76.

[0101] The concentrate conveying train is arranged vertically with the ore processing train, and the carriages 77 of the concentrate conveying train pass under the discharge chute 65 of the secondary concentrate bucket elevator one by one during loading.

[0102] The foundation pit unit of the coarse crushing and coarse selection module 1 is a pit body that is closed on three sides and open on one side. Two truck trestle bridges 78 arranged in mirror image on the top of the foundation pit are bolted to the ring beams on both sides of the feeding platform 79 of the toothed roller crusher.

[0103] When the hydraulic levers on either side of the coarse crushing and coarse selection module 1 are fully retracted, the coarse crushing and coarse selection frame 7 folds back flush with the vehicle body. When the hydraulic levers are fully extended, the coarse crushing and coarse selection frame 7 is pushed and rotated perpendicular to the vehicle body. Four platforms are connected to the coarse crushing and coarse selection frame 7 of the coarse crushing and coarse selection module 1. When the coarse crushing and coarse selection frame 7 is raised, the coarse crusher feed platform 79, the coarse crusher base platform 80, the coarse selection platform 81, and the coarse selection discharge platform 82 are located from top to bottom. All four platforms are welded to the portal frame via square ring beams. When the portal frame is erected, four ground anchors 83 are installed at the bottom of its four rectangular steel columns. The ground anchors are circular, with a diameter of 500-1000 mm.

[0104] The feeding platform 79 of the toothed roller crusher of the coarse crushing and coarse selection module 1 is used to connect with the feeding trestle 78. The transmission support 84 of the toothed roller crusher and the crusher support are bolted to the toothed roller crusher base platform 80.

[0105] The roughing magnetic separation unit is composed of magnetic separation unit A and magnetic separation unit B. The two magnetic separation units are arranged in a mirror-symmetrical manner with respect to the longitudinal center line of the tooth roller crusher in the width direction of the discharge port.

[0106] The two roughing magnetic separation units share a feeding trough 85, which is a box structure arranged at the bottom of the coarse crushing unit discharge hopper 86 and connected to its flange.

[0107] The structures of the two roughing magnetic separation units are the same, and the structure of the magnetic separation unit A on the right is described.

[0108] The magnetic separation unit A is composed of a magnetic separation plate 87, a redirecting roller A91 and a redirecting roller B92, a driving roller 88, a conveyor belt 89 and a driving roller transmission device 90. The driving roller transmission device 90 is built into the driving roller cylinder.

[0109] The driving roller cylinder and the base 93 of the driving unit are bolted to the rough selection platform 81.

[0110] The magnetic separation plate 87 is welded to the inner sides of the front and rear side plates of the feeding trough 85. The magnetic separation plate 87 is composed of a vertical plate and a folded plate welded to it at an angle of 110 - 130° below it. The length of the vertical plate is 500 - 800 mm, and the length of the folded plate is 200 - 400 mm.

[0111] Above the outer side of the magnetic separation plate 87, there is a redirecting roller cylinder A91, and outside the folded plate, there is a redirecting roller B92. The conveyor belt 89 is sleeved around the magnetic separation plate 87, the redirecting roller A91, the redirecting roller B92 and the driving roller 88 in sequence.

[0112] The arc angles of the conveyor belt 89 at the redirecting roller A91 and the redirecting roller B92 are 110 - 130°. After passing over the redirecting rollers, it becomes a horizontal section conveyor belt to the driving roller 88, and the length of the horizontal section is 1 - 1.5 m. The conveyor belt 89 is lined with wear-resistant rubber with a thickness of 30 mm - 80 mm on the surface. The magnetic separation plate 87 is a permanent magnet magnetic system with a surface magnetic field intensity of 500 mT - 600 mT. The maximum particle size of the rough selection feed is 200 - 300 mm. The belt transmission direction at the magnetic separation plate 87 is downward transmission consistent with the material flow. The driving roller transmission device 90 can be frequency-controlled for speed regulation.

[0113] The rough selection discharge unit is a box structure. At the lower part of the box, from right to left, there are a rough selection unit A concentrate discharge chute 94, a waste rock discharge chute 95, and a rough selection unit B concentrate discharge chute 96 respectively. The two concentrate discharge chutes are respectively connected to two rough selection concentrate discharge belt conveyors 43. When the rough crushing and rough selection module 1 is erected, the rough selection discharge platform 82 is located above the two rough selection concentrate discharge belt conveyors 43, and the middle of the ring beam of the rough selection discharge platform 82 is open.

[0114] When the hydraulic rods on both sides of the vehicle body of the first-stage medium crushing and screening module 2 are fully retracted, the first-stage medium crushing and screening frame 8 folds back to be flush with the vehicle body. When the hydraulic rods are fully extended, they push the first-stage medium crushing and screening frame 8 to rotate until it is perpendicular to the vehicle body. Four platforms are connected to the first-stage medium crushing and screening frame 8. When the first-stage medium crushing and screening frame 8 rises, from top to bottom, there are the feeding platform 97 for the medium crushing cone crusher, the foundation platform 98 for the medium crushing cone crusher, the rough screening platform, the discharging platform 99, and the feeding platform 100. The transmission support 101 of the first-stage screening cone crusher and the support 102 of the first-stage screening crusher in the first-stage medium crushing and screening module 2 are bolted to the foundation platform 98 of the medium crushing cone crusher. The four platforms are all welded to the gantry through the square ring beams. When the gantry is erected, four ground anchors are provided at the lower parts of the four steel columns of its rectangular cross-section. The ground surface of the ground anchor is a circle with a diameter of 500 - 1000 mm.

[0115] The first-stage screening unit consists of the first-stage screening feeding hopper 104 and the annular magnetic separator Ⅰ 105. The first-stage screening feeding hopper 104 consists of the fixed outer ring surface 108, the rotating inner ring surface 109, and the inner ring top plate 110. The fixed outer ring surface 108 is bolted to the rough screening platform and the discharging platform 99 through the support 107 on the outside of the feeding hopper. The first-stage screening feeding hopper 104 is arranged below the discharging port of the circumferential row of the cone crusher. The feeding hopper is an annular cavity with a small upper opening and a large lower opening, and the generatrix inclination angle is 75 - 85 degrees. The upper opening of the fixed outer ring surface 108 is located 50 - 100 mm outside the circumferential discharging port of the cone crusher, and the upper opening of the rotating inner ring surface 109 is located 50 - 100 mm inside the circumferential discharging port of the cone crusher. The rotating inner ring surface 109 is a rotary structure. The top of its rotating central axis Ⅰ 111 is bolted to the lower part of the inner ring top plate 110, the bottom of the rotating central axis Ⅰ 111 is connected to the variable-frequency rotating motor, and the rotating central axis Ⅰ 111 is connected to the rough screening platform and the discharging platform 99 through the bearing support Ⅰ 112.

[0116] The annular magnetic separator Ⅰ 105 is concentrically placed inside the rotating inner ring surface 109. The upper edge is 100 - 150 mm away from the lower edge of the inner ring top plate 110; the generatrix inclination angle is the same as that of the rotating inner ring surface 109. The circumferential angle of the annular magnetic separator Ⅰ 105 is 330°, the material is permanent magnet, and the external surface magnetic field strength is 400 - 500 mT. The annular magnetic separator Ⅰ 105 is bolted to the rough screening platform and the discharging platform 99 through its support.

[0117] The first-stage screening waste stone discharging hopper 113 is located below the first-stage screening feeding hopper 104 corresponding to the 330° annular magnetic separator Ⅰ 105, and the first-stage screening ore discharging hopper 114 is located below the first-stage screening feeding hopper 104 corresponding to the 30° non-annular magnetic separator.

[0118] When the hydraulic rods on both sides of the vehicle body of the fine crushing and secondary screening module 3 are fully retracted, the fine crushing and secondary screening frame 9 folds back to be flush with the vehicle body. When the hydraulic rods are fully extended, they push the fine crushing and secondary screening frame 9 to rotate until it is perpendicular to the vehicle body.

[0119] Four platforms are connected to the fine crushing and secondary screening frame. When the fine crushing and secondary screening frame rises, from top to bottom, there are the cone crusher feeding platform 117, the cone crusher foundation platform 118, the secondary screening platform 119, and the secondary screening discharge platform 120. All four platforms are welded to the gantry through square ring beams. When the gantry is erected, four ground anchors are provided at the lower parts of the four steel columns with rectangular cross-sections of the gantry. The ground of the ground anchor is a circle with a diameter of 500 - 1000 mm.

[0120] At the top of the cone crusher of the fine crushing and secondary screening module, there is a cone crusher feeding platform 117, which is used to connect with the discharge chute 64 of the primary concentrate bucket elevator of the medium crushing and primary screening module 2. The transmission support 122 of the secondary screening cone crusher and the support 123 of the secondary screening crusher are bolted to the cone crusher foundation platform 118.

[0121] The secondary screening feed hopper 124 is arranged below the discharge opening of the circumferential row of the cone crusher. The secondary screening feed hopper 124 is a ring-shaped shell with a small upper opening and a large lower opening, and the busbar inclination angle is 75 - 85 degrees. The circular upper opening of the secondary screening feed hopper 124 is located 50 - 100 mm outside the circumferential discharge opening of the cone crusher. The secondary screening feed hopper 124 is bolted to the secondary screening platform 119 through the feed hopper base 125 on its outside.

[0122] The annular magnetic separator II 126 is concentrically placed inside the secondary beneficiation feed hopper 124, and the height of the annular magnetic separator II 126 is the same as that of the secondary beneficiation feed hopper 124. The circumference of the annular magnetic separator II 126 is located 50 - 100 mm inside the circumferential discharge opening of the cone crusher, and the generatrix inclination angle is the same as that of the secondary beneficiation feed hopper 124. A circular top plate 127 is provided at the upper opening of the annular magnetic separator II 126. The top of the rotation center shaft II 128 of the annular magnetic separator II 126 is bolted to the lower base 129 of the circular top plate 127, the bottom of the rotation center shaft II 128 is connected to the variable-frequency rotation motor 130, and the rotation center shaft II 128 is bolted to the secondary beneficiation platform 119 through the bearing block II 131 respectively. The 330° toroidal surface of the annular magnetic separator II 126 is an electromagnetic curved plate structure, with a wear-resistant rubber lining 20 - 30 mm thick on the surface, and the external surface field strength is 250 - 400 mT. The annular magnetic separator II 126 is slidably connected to the annular body support 132, and radial limit is carried out through the annular body support 132 during rotation. The surface of the annular magnetic separator II 126 is composed of electromagnetic curved plates 133 of the same size spliced together, and the angle covered by each electromagnetic curved plate 133 on the toroidal surface is 10 - 20°. A contact switch 134 is provided at the inner bottom of each electromagnetic curved plate 133, and the contact switch is a spring-type contact switch. An electric slip ring 135 is provided below the electromagnetic curved plate 133, and the thickness of the electric slip ring 135 is 1 - 3 cm. An electric connection groove 136 with a width of 5 - 10 mm is provided in the middle of the electric slip ring 135, the connection point groove 136 is located directly below the contact switch 134, and insulating rubber is provided on both sides of the electric connection groove 135. The circumferential angle of the electric slip ring 135 is 330°. The current intensity of the electric slip ring 135 is adjustable, and the start-stop and variable-frequency signals of the rotation motor of the annular magnetic separator II 126 and the current intensity signal of the electric slip ring 135 are all connected to the control box.

[0123] The secondary beneficiation waste stone discharge hopper 138 is located below the secondary beneficiation feed hopper 124 corresponding to the 330° annular electric slip ring 135, and the secondary beneficiation ore discharge hopper 137 is located below the secondary beneficiation feed hopper 124 corresponding to the 30° non-electric slip ring.

[0124] When the hydraulic rods on both sides of the vehicle body of the high-pressure roller mill three-stage beneficiation module 4 are fully retracted, the high-pressure roller three-stage beneficiation rack 10 folds back to be flush with the vehicle body, and when the hydraulic rods are fully extended, it pushes the high-pressure roller three-stage beneficiation rack 10 to rotate to be perpendicular to the vehicle body.

[0125] Four platforms are connected to the high-pressure roller three-stage beneficiation rack 10. When the high-pressure roller three-stage beneficiation rack is raised, from top to bottom, they are the high-pressure roller mill feed platform 139, the high-pressure roller mill foundation platform 140, the hopper foundation platform 141, and the three-stage beneficiation discharge platform 142. They are all welded to the gantry through the square ring beam. When the gantry is erected, four ground anchors are provided at the lower parts of the four steel columns of its rectangular cross-section, and the ground of the ground anchor is a circle with a diameter of 500 - 1000 mm.

[0126] The included angle of the sector electromagnetic curved panel 144 is 70 - 80°, and the sector electromagnetic curved panel 144 is welded to the surface of the fixed shaft 146 built inside the high-pressure roller mill roller through the connecting plate 145 on its concave side. The sector electromagnetic curved panel 144 is composed of 4 - 7 pieces and is successively arranged on both sides of the rotating bearing 147.

[0127] Two high-pressure roller mill rollers are symmetrically and mirror-mounted inside the high-pressure roller mill box body 20. The sector electromagnetic curved panel 144 is located at the lower part of the roller, and the convex electromagnetic material side of the sector electromagnetic curved panel 144 faces the material flow. The electromagnetic surface of the sector electromagnetic curved panel 144 is 20 - 40 mm away from the inner wall of the high-pressure roller mill cylinder.

[0128] There are 3 - 6 groups of rotating bearings 147, which are equally spaced and built inside the roller. The rotating bearing 147 is disc-shaped, its outer ring surface is welded to the inner ring surface 148 of the roller, and the inner ring surface 149 of the rotating bearing is rollingly connected to the fixed shaft 146 through the ball 150. The end face 151 of the roller is connected to the drive motor through the drive shaft 152.

[0129] The magnetic field intensity of the sector electromagnetic curved panel 144 is 150 - 250 mT. The magnetic field intensity of the sector electromagnetic curved panel 144 is adjustable, and its current intensity signal is connected to the control box.

[0130] The lower edge of the sector electromagnetic curved panel 144 is above the lowest lower edge of the roller. A discharge box 153 is provided at the lower part of the high-pressure roller mill, and longitudinal partition plates 154 are provided at the lower edges of the two counter-rollers inside the discharge box 153.

[0131] An ore discharge chute 155 and a waste rock discharge chute 156 are provided at the lower part of the high-pressure roller mill box body 20 from left to right.

Claims

1. An integrated iron ore upgrading system, characterized in that, It includes a coarse crushing and rough selection module, an intermediate crushing and first-stage fine selection module, a fine crushing and second-stage fine selection module, a high-pressure roll and third-stage fine selection module, a vehicle-mounted unit, and a bucket elevator. The vehicle-mounted unit is formed by connecting 4 sections of car body boxes in series. The coarse crushing and rough selection module, the intermediate crushing and first-stage fine selection module, the fine crushing and second-stage fine selection module, and the high-pressure roll and third-stage fine selection module are respectively connected to each section of the car body box, and can be laid flat on the upper end of the car body box or stand upright at the tail of the car body box under the traction drive of a hydraulic cylinder. A bucket elevator is fixed at the front end of each car body box. The coarse crushing and rough selection module, the intermediate crushing and first-stage fine selection module, the fine crushing and second-stage fine selection module, and the high-pressure roll and third-stage fine selection module respectively send iron-containing concentrate into the front-end bucket elevator through a belt conveyor, and then the bucket elevator feeds the material to the crushing and beneficiation module at its front end; The coarse crushing and rough selection are integrated into one machine, the intermediate crushing and first-stage fine selection are integrated into one machine, the fine crushing and second-stage fine selection are integrated into one machine, and the high-pressure roll grinding and third-stage fine selection are integrated into one machine, thus realizing the integration of the coarse crushing - rough selection - intermediate crushing - first-stage machine selection - fine crushing - second-stage fine selection - high-pressure roll grinding - third-stage fine selection module; The intermediate crushing and first-stage fine selection module includes an intermediate crushing and first-stage fine selection frame, a cone crusher, a magnetic separation unit, a first-stage concentrate discharge chute, and a first-stage waste rock discharge chute. The cone crusher, the magnetic separation unit, the first-stage concentrate discharge chute, and the first-stage waste rock discharge chute are installed in the intermediate crushing and first-stage fine selection frame. The intermediate crushing and first-stage fine selection frame is hinged to the tail of the car body box and is traction-driven by a hydraulic cylinder. The cone crusher and the magnetic separation unit are arranged vertically. The magnetic separation unit includes a fixed outer ring surface, a rotating inner ring surface, an inner ring top plate, and a ring-shaped magnetic separator Ⅰ. The inner ring top plate is fixed at the upper end of the rotating inner ring surface. The fixed outer ring surface is outside the rotating inner ring surface, and the fluid channel formed between the fixed outer ring surface and the rotating inner ring surface is communicated with the annular feeding chute of the cone crusher. The ring-shaped magnetic separator Ⅰ is inside the rotating inner ring surface. The ring-shaped magnetic separator Ⅰ is a 330° ring. The first-stage waste rock discharge chute is at the bottom of the fluid channel formed between the fixed outer ring surface and the rotating inner ring surface corresponding to the 330° ring surface of the ring-shaped magnetic separator. The first-stage concentrate discharge chute is at the bottom of the fluid channel formed between the fixed outer ring surface and the rotating inner ring surface corresponding to the 30° vacancy of the ring-shaped magnetic separator. The fixed outer ring surface, the rotating inner ring surface, and the ring-shaped magnetic separator Ⅰ are all conical with a smaller upper end and a larger lower end and are coaxially arranged. The rotating inner ring surface and the inner ring top plate can rotate. The ring-shaped magnetic separator Ⅰ is a permanent magnet with a magnetic field intensity of 400mT - 500mT; The fine crushing and secondary beneficiation module includes a fine crushing and secondary beneficiation frame, a cone crusher, a magnetic separation unit, a secondary beneficiation ore discharge hopper, and a secondary beneficiation waste rock discharge hopper. The cone crusher, the magnetic separation unit, the secondary beneficiation ore discharge hopper, and the secondary beneficiation waste rock discharge hopper are installed in the fine crushing and secondary beneficiation frame. The fine crushing and secondary beneficiation frame is hinged to the tail of the car body box and is traction-driven by a hydraulic cylinder. The cone crusher and the magnetic separation unit are arranged vertically. The magnetic separation unit includes a secondary beneficiation feeding hopper and a ring-shaped magnetic separator II. The ring-shaped magnetic separator II is concentrically placed inside the secondary beneficiation feeding hopper. The top of the ring-shaped magnetic separator II is closed and can be driven to rotate by a motor. A plurality of electromagnetic curved panels are evenly arranged in a circumferential splicing manner on the outer surface of the ring-shaped magnetic separator II. A spring contact is provided at the bottom of each electromagnetic curved panel, and the spring contact contacts the ring-shaped power receiving ring. The ring-shaped power receiving ring is arranged at 330° circumferentially. The bottom of the secondary beneficiation feeding hopper corresponding to the 30° vacant area of the ring-shaped power receiving ring is the secondary beneficiation ore discharge hopper, and the bottom of the secondary beneficiation feeding hopper corresponding to the 330° area of the ring-shaped power receiving ring is the secondary beneficiation waste rock discharge hopper. Both the secondary beneficiation feeding hopper and the ring-shaped magnetic separator II are conical with a smaller upper end and a larger lower end.

2. The integrated iron ore upgrading system according to claim 1, wherein The belt conveyor can be fixed to the upper end of the car body box and can be folded and suspended on the side of the car body box.

3. The integrated iron ore upgrading system according to claim 2, characterized in that, The coarse crushing and primary beneficiation module includes a coarse crushing and primary beneficiation frame, a pair of toothed roll crushers, a magnetic separation unit, a feeding chute, a coarse crushing unit discharge hopper, a concentrate discharge chute, and a waste rock discharge chute. The pair of toothed roll crushers, the magnetic separation unit, the feeding chute, the coarse crushing unit discharge hopper, the concentrate discharge chute, and the waste rock discharge chute are installed in the coarse crushing and primary beneficiation frame. The coarse crushing and primary beneficiation frame is hinged to the tail of the car body box and is traction-driven by a hydraulic cylinder. The pair of toothed roll crushers is above the feeding chute and is connected to the feeding chute through the coarse crushing unit discharge hopper. The magnetic separation unit is arranged symmetrically on both sides inside the feeding chute. The concentrate discharge chute is below the magnetic separation unit. The waste rock discharge chute is between the two concentrate discharge chutes.

4. The integrated iron ore upgrading system according to claim 3, wherein, The magnetic separation unit includes a magnetic separation plate, a redirecting roller, a driving roller, and a conveyor belt. The magnetic separation plate is arranged vertically and is fixedly connected to the box body of the feeding chute through non-magnetic folding plates at the upper and lower ends. A redirecting roller is provided at the end of the non-magnetic folding plate. The conveyor belt is wound around the magnetic separation plate, the redirecting roller, and the driving roller. The magnetic separation plate is a permanent magnet system with a magnetic field intensity of 500 mT - 600 mT.

5. The integrated iron ore upgrading system according to claim 1, characterized in that The outside of the electromagnetic curved panel is lined with wear-resistant rubber. The ring-shaped power receiving ring is provided with a power receiving groove of 5 - 10 mm. The power receiving groove is directly below the spring contact. The two sides of the power receiving groove are insulating rubber. The magnetic field intensity of the electromagnetic curved panel is 300 mT - 400 mT.

6. The integrated iron ore upgrading system according to claim 1, wherein The high-pressure roll three-stage beneficiation module includes a high-pressure roll mill box body, high-pressure roll mills, fan-shaped electromagnetic curved plates, connecting plates, fixed shafts, rotating bearings, ore discharge chutes, and waste rock discharge chutes. The high-pressure roll mills are arranged in pairs in the high-pressure roll mill box body and are driven to rotate by motors. A fixed shaft is arranged inside the roll cylinders of the high-pressure roll mills. The fixed shaft is connected with fan-shaped electromagnetic curved plates through connecting plates. The fan-shaped electromagnetic curved plates in the two roll cylinders are arranged in a mirror-image confrontation. The fan-shaped electromagnetic curved plates face the side of the material flow. The roll cylinders of the high-pressure roll mills are connected with the fixed shafts through rotating bearings. Ball bearings are arranged between the rotating bearings and the fixed shafts. The ore discharge chutes are located at the bottoms on both sides of the two roll cylinders outside the area of the fan-shaped electromagnetic curved plates. The waste rock discharge chutes are located at the bottoms between the two roll cylinders inside the area of the fan-shaped electromagnetic curved plates.

7. The integrated iron ore upgrading system according to claim 6, wherein, The magnetic field intensity of the fan-shaped electromagnetic curved plate is 150mT - 250mT.

8. An integrated iron ore upgrading system according to claim 1, characterized in that, It further includes a concentrate conveying train. The concentrate conveying train is arranged perpendicular to the vehicle-mounted unit and is in front of the high-pressure roll three-stage beneficiation module. The high-pressure roll three-stage beneficiation module feeds materials to the concentrate conveying train through a bucket elevator.

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