Device for preparing high-quality magnetite lump ore

Abstract

A high-quality magnet lump ore preparation device belongs to the solid material processing technical field of the ore dressing plant. The technical scheme is that a coarse crushing-coarse separation module is connected with a medium crushing-precise separation module, the coarse crushing-coarse separation module and the medium crushing-precise separation module are respectively connected with a vehicle-mounted module; a concentrate conveying train is connected with the vehicle-mounted module; a foundation pit unit is internally provided with a rack A; a coarse crushing unit and a coarse separation unit are connected with the rack A, the coarse separation unit is connected with the coarse crushing unit; a discharge hopper A is connected with the coarse separation unit; a medium crushing unit and a precise separation unit are connected with a rack B; and a discharge hopper B is connected with the precise separation unit. The beneficial effects are that the coarse crushing and coarse separation operation of the magnet rich ore and the medium crushing and precise separation operation are respectively integrated on a processing train, the direct loading of the concentrate on the train can be realized, the magnetite two-stage type crushing-preliminary separation train carrying type ore dressing system can be quickly moved and arranged, the equipment and plant investment is reduced, the operation cost is reduced, and the processing facility can be repeatedly used in different mines.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of solid material processing in concentrators, and particularly relates to a high-quality magnetite lump ore preparation device. BACKGROUND

[0002] At present, many open-pit magnetite mines have an iron grade of ore of more than 50, and some even close to 60%. For these open-pit magnetite mines, the ore needs to be dry selected to throw out gangue contained in the ore and surrounding rock mixed in the mining, so that the grade can reach 62%-68% for sale.

[0003] After the grade of the rich ore is improved, the rich ore is directly fed into a furnace for smelting, and does not need traditional sintering and pelletizing, so the high-grade rich ore is the most in-demand iron ore product at present, and has the highest price.

[0004] For the open-pit magnetite, the product particle size of the mined ore can meet the best particle size requirement of smelting into a furnace only after coarse crushing and medium crushing, and the product particle size is less than 60 mm, which is the best magnetite lump ore. Coarse crushing and medium crushing are further dissociation of the ore, which is beneficial to throwing out more gangue, and only in this way can the grade of the ore be improved to 62%-68%. Therefore, the general process flow of the magnetite rich ore is coarse crushing-medium crushing-dry selection, but the grade still has room for improvement after one dry selection, so the most ideal process flow should be coarse crushing-coarse selection-medium crushing-precise selection.

[0005] Due to the large hardness of the magnetite and the large single-machine processing capacity of the gyratory crusher, the coarse crushing device used by the current open-pit magnetite mine, especially the large open-pit magnetite mine, is mostly a gyratory crusher. The medium crushing device generally used is a cone crusher. The two kinds of crushers are circular periphery discharge of the bottom circular ring-shaped discharge port. This discharge mode cannot realize the strip-shaped feeding of the traditional magnetic roller, so the material cannot be directly fed into the magnetic roller of the belt dry selection machine, and the one-stop integration of the magnetic roller and the cone crusher cannot be realized to reduce the equipment and plant investment.

[0006] Most of the current open-pit mines are composed of multiple mining sections. Even in the same mining section, the mining area is constantly changing with the change of the mining range. If coarse crushing and coarse selection can be integrated into one device, medium crushing and precise selection can be integrated into one device, and the two integrated machines can be quickly moved with the change of the mining area, so that the coarse crushing-coarse selection-medium crushing-precise selection operation can be always set near the mining area, the coarse crushing-coarse selection-medium crushing-precise selection devices can be repeatedly used, the haul distance of the mined ore can be greatly reduced, and the equipment purchase cost and production cost can be greatly reduced.

[0007] Many mines currently use trains to transport their products, and the mines include railway systems. If a coarse crushing-roughing-medium crushing-concentration process can be integrated on a single ore processing train, the concentrated product can be directly transported by a concentrate transport train, so that the entire concentrate transport train can be arranged in the mining area, thereby eliminating the need for concentrate belt transport, storage and loading facilities, and greatly reducing the output cost of the concentrate.

[0008] Therefore, it is necessary to develop a high-quality magnetite lump ore preparation device that can integrate the coarse crushing and roughing operations of magnetite-rich ore and the medium crushing and concentration operations on a single processing train, directly load the concentrate into the train, and quickly move the entire processing facility, so as to reduce equipment and plant investment, reduce operating costs, and realize the reuse of the processing facility in different mines. SUMMARY

[0009] In order to solve the problems existing in the prior art and meet the needs of the prior art, the present application provides a high-quality magnetite lump ore preparation device that can integrate the coarse crushing and roughing operations of magnetite-rich ore and the medium crushing and concentration operations on a single processing train, directly load the concentrate into the train, and quickly move the entire processing facility, so as to reduce equipment and plant investment, reduce operating costs, and realize the reuse of the processing facility in different mines.

[0010] The technical scheme is as follows:

[0011] A high-quality magnetite lump ore preparation device, comprising:

[0012] A coarse crushing-roughing module is connected to a medium crushing-concentration module, and the coarse crushing-roughing module and the medium crushing-concentration module are respectively connected to a vehicle-mounted module;

[0013] A concentrate transport train is connected to the vehicle-mounted module;

[0014] The coarse crushing-roughing module comprises:

[0015] A foundation pit unit with a built-in rack A;

[0016] A coarse crushing unit and a roughing unit are connected to the rack A, and the roughing unit is connected to the coarse crushing unit;

[0017] A discharge hopper A is connected to the roughing unit;

[0018] The medium crushing-concentration module comprises:

[0019] A medium crushing unit and a concentration unit are connected to a rack B;

[0020] A discharge hopper B is connected to the concentration unit.

[0021] Further, the coarse crushing unit comprises a main housing A, a moving cone A and a transmission part A, the main housing A is internally provided with the moving cone A, and the transmission part A is connected with the moving cone A;

[0022] The medium crushing unit comprises a main housing B, a moving cone B and a transmission part B, the main housing B (8) is internally provided with the moving cone B, and the transmission part B is connected with the moving cone B;

[0023] The vehicle-mounted module comprises a coarse crushing-roughing module vehicle plate and a medium crushing-fine grinding vehicle plate, the coarse crushing-roughing module vehicle plate and the medium crushing-fine grinding vehicle plate are connected; the upper sides of the two sides of the coarse crushing-roughing module vehicle plate are provided with hydraulic push rods A connected with rotating shafts A on the two sides of the vehicle body and rotating shafts B on the two sides of the door-shaped frame of the module; the upper sides of the two sides of the medium crushing-fine grinding vehicle plate are provided with hydraulic push rods B connected with rotating shafts C on the two sides of the vehicle body and rotating shafts D on the two sides of the door-shaped frame of the module; the tail part of the coarse crushing-roughing module vehicle plate is connected with a rotating shaft E at the tail part of the door-shaped frame of the module; and the tail part of the medium crushing-fine grinding vehicle plate is connected with a rotating shaft F at the tail part of the door-shaped frame of the module.

[0024] Further, one side of the coarse crushing-roughing module vehicle plate is provided with a roughing concentrate belt conveyor, the roughing concentrate belt conveyor is connected with a hanging shaft A arranged longitudinally on the side edge of the vehicle plate through a hanging rod A arranged at equal intervals on the lower support leg A of the roughing concentrate belt conveyor; one side of the medium crushing-fine grinding vehicle plate is provided with a fine grinding concentrate belt conveyor, the fine grinding concentrate belt conveyor is connected with a hanging shaft B arranged longitudinally on the side edge of the vehicle plate through a hanging rod B arranged at equal intervals on the lower support leg B of the fine grinding concentrate belt conveyor;

[0025] The outer side of the head part of the coarse crushing-roughing module vehicle plate is vertically provided with a roughing concentrate bucket elevator, and the outer side of the head part of the medium crushing-fine grinding vehicle plate is vertically provided with a fine grinding concentrate bucket elevator; the discharge chute A of the roughing concentrate bucket elevator is located above the medium crushing feeding platform in the working state, and the discharge chute B of the fine grinding concentrate bucket elevator is located above the concentrate conveying train carriage;

[0026] In the working state, the roughing concentrate bucket elevator and the fine grinding concentrate bucket elevator are horizontally arranged above the vehicle body from the hanging shaft on the side edge of the vehicle body and connected with the bottom platform of the vehicle plate, the tail parts of the roughing concentrate bucket elevator and the fine grinding concentrate bucket elevator are respectively located below the roughing concentrate bucket and the fine grinding concentrate bucket, and the head parts are respectively located above the roughing concentrate bucket conveyor receiving hopper and the fine grinding concentrate bucket conveyor receiving hopper;

[0027] The tail part of the waste rock belt conveyor is arranged below the roughing waste rock bucket and the fine grinding waste rock bucket, and the head part of the waste rock belt conveyor passes through the opening of the vehicle plate and enters the independently externally arranged waste rock transfer belt conveyor.

[0028] Further, the rough crushing-roughing module truck plate and the medium crushing-precise grinding truck plate are respectively provided with hydraulic power devices below the respective truck plates, and the hydraulic power devices are connected with the control box.

[0029] The concentrate conveying train and the ore processing train are vertically arranged, and the carriages of the concentrate conveying train pass below the discharge chute B of the selected concentrate bucket elevator one by one when the carriages are loaded.

[0030] The foundation pit unit is a pit body with three closed sides and one open side, and two truck viaducts and the feeding platform of the gyratory crusher are connected with the hoop beams on both sides of the feeding platform.

[0031] When the hydraulic rods on both sides of the truck body of the rough crushing-roughing module are fully retracted, the door-shaped frame is folded back to be flush with the truck body, and when the hydraulic rods are fully extended, the door-shaped frame is pushed to be perpendicular to the truck body. Four platforms are connected to the door-shaped frame of the rough crushing-roughing module, and when the door-shaped frame is raised, the four platforms are, from top to bottom, the gyratory crusher feeding platform (44), the gyratory crusher foundation platform, the roughing platform and the discharge platform A. The four platforms are welded to the door-shaped frame through four hoop beams. When the door-shaped frame is raised, the lower parts of the four steel columns of the rectangular cross section of the door-shaped frame are provided with four ground anchors A, and the anchor rods of the four ground anchors A are full-thread structures.

[0032] Further, the gyratory crusher feeding platform of the rough crushing-roughing module is connected with the feeding viaduct, and the transmission part support A of the gyratory crusher and the support A of the crusher are connected with the gyratory crusher foundation platform.

[0033] The roughing unit includes a roughing feeding hopper, an annular magnetic separation body A and a transmission device. The annular magnetic separation body A is built in the roughing feeding hopper, and the annular magnetic separation body A is connected with the transmission device and connected with the roughing foundation platform through a support B outside the roughing feeding hopper. The roughing feeding hopper is arranged below the annular circumferential discharge port of the gyratory crusher, and is an annular cavity with a small upper opening and a large lower opening and a bus bar inclination angle of 75-85 degrees.

[0034] The roughing feeding hopper includes a fixed outer ring surface, a rotary inner ring surface and an inner ring top plate. The upper opening of the fixed outer ring surface of the roughing feeding hopper is located outside the circumferential discharge port of the gyratory crusher, and the upper opening of the rotary inner ring surface is located inside the circumferential discharge port of the gyratory crusher. The rotary inner ring surface of the roughing feeding hopper is a rotary structure, the top of the rotating center shaft A is connected with the top of the roughing feeding hopper below, the rotating center shaft A is connected with a variable frequency rotating motor after passing through the roughing feeding hopper, and the rotating center shaft A is connected with the roughing platform through a bearing support.

[0035] Further, the roughing discharge hopper is arranged below the roughing feeding hopper, which comprises a roughing ore discharge hopper and a roughing waste rock discharge hopper, the roughing waste rock discharge hopper is arranged below the waste rock discharge port formed by the inner ring surface of the 300-degree annular magnetic body corresponding to the roughing feeding hopper and the outer ring surface of the roughing feeding hopper, and the roughing ore discharge hopper is arranged below the ore discharge port formed by the inner ring surface of the 60-degree non-annular magnetic body corresponding to the roughing feeding hopper and the outer ring surface of the roughing feeding hopper.

[0036] Further, the door-shaped frame of the medium crushing-precise selection module is connected with four platforms, when the door-shaped frame is raised, the four platforms are arranged in sequence from top to bottom as a conical crusher feeding platform, a conical crusher base platform, a dry selection platform and a discharge platform B; the four platforms are welded with the door-shaped frame through four square beams, when the door-shaped frame is raised, the lower part of the four steel columns with rectangular cross section is provided with four ground anchors B, the anchor rods of the four ground anchors B are full-thread structures;

[0037] The top of the conical crusher of the medium crushing-precise selection module is provided with a feeding platform for connecting with the discharge chute A of the ore bucket elevator of the coarse crushing-coarse selection module; the transmission part support B of the conical crusher and the support C of the crusher are connected with the conical crusher base platform.

[0038] Further, the precise selection unit is composed of a precise selection feeding hopper and a precise selection magnetic selection device; the precise selection feeding hopper is arranged below the annular circumferential discharge port of the conical crusher, the feeding hopper is an annular shell with a small upper opening and a large lower opening, and the inclination angle of the generatrix is 75-85 degrees; the circular upper opening of the precise selection feeding hopper is located outside the circumferential discharge port of the conical crusher; the precise selection feeding hopper is connected with the middle layer platform of the frame through the base outside the feeding hopper.

[0039] Further, the precise selection magnetic selection device is an annular magnetic body B with a small upper opening and a large lower opening, the annular magnetic body B is concentrically arranged inside the precise selection feeding hopper, and the height of the annular magnetic body B is consistent with the height of the precise selection feeding hopper (70);

[0040] The circumference of the annular magnetic body B is located inside the circumferential discharge port of the conical crusher, and the inclination angle of the generatrix is consistent with that of the precise selection feeding hopper; the upper opening of the annular magnetic body B is provided with a circular top plate;

[0041] The annular magnetic body B is a rotary structure, the top of the rotating center shaft B is connected with the base below the top plate, the rotating center shaft B is connected with a variable frequency rotating motor after passing through the precise selection ore discharge hopper, and the rotating center shaft B is connected with the dry selection base platform of the door-shaped support through a bearing seat;

[0042] The 360° ring surface of the annular magnetic body B is an electromagnet structure, and the surface is lined with wear-resistant rubber, the outer surface field strength is 250-400 mT, and the annular magnetic body B is connected with the middle layer platform of the frame through the support B;

[0043] The electromagnetic ring surface is spliced by electromagnetic curved panels with same size, and each electromagnetic curved panel covers an angle of 10-20 degrees on the annular surface;

[0044] A contact switch is arranged below the inner side of each electromagnetic curved panel, and the contact switch is a spring contact switch.

[0045] The inner side of the magnetic ring surface on the circular bottom plate of the annular magnetic separation body B is provided with an electricity connection ring, and the electricity connection ring is provided with an electricity connection groove in the middle, the electricity connection groove is arranged directly below the contact switch, and the two sides of the electricity connection groove are made of insulating rubber.

[0046] Further, the fine selection discharge hopper is arranged below the fine selection feeding hopper, and includes a fine selection ore discharge hopper and a fine selection waste rock discharge hopper, the fine selection waste rock discharge hopper is arranged below the waste rock discharge port formed by the waste rock sorting surface corresponding to the 300-degree annular electricity connection plate and the feeding hopper, and the fine selection ore discharge hopper is arranged below the fine selection waste rock discharge port formed by the ore unloading area corresponding to the 60-degree non-electricity connection ring and the feeding hopper.

[0047] The discharge hoppers of the fine selection waste rock and ore are both the converging hopper with an annular upper opening and a long strip quadrilateral lower opening, and the upper openings of the discharge hoppers of the waste rock and ore are both circumscribed on the outer circle of the ore discharge port and the waste rock discharge port of the feeding hopper.

[0048] The high-quality magnet block ore preparation device has the following advantages:

[0049] The high-quality magnet block ore preparation device has the following advantages:

[0050] 1) The system integrates coarse crushing and rough selection into an integrated machine, and integrates medium crushing and fine selection into an integrated machine, thereby realizing high integration of coarse crushing-rough selection-medium crushing-fine selection, and finally reducing the particle size of the product to less than 60mm after medium crushing to meet the conditions for direct smelting, and through the rough selection-fine selection mode, through two-stage separation with decreasing field strength, the rough selection throws out gangue and country rock, and the fine selection throws out low-grade ore and intergrowth, this two-stage gradual release mode realizes deep grade improvement of the grade of the mined ore with a grade of 50%-60%, and the final concentrate grade can reach 62%-68%. Thus, through simple process and equipment integration, high-quality iron concentrate with high sales price is obtained, with low cost and high benefit.

[0051] 2) The devices of the coarse crushing-rough selection-medium crushing-fine selection process are integrated and arranged on a train, thereby eliminating the need to set up various crushing workshops and dry selection workshops in traditional fixed workshops, and reducing the capital investment.

[0052] 3) The rough crushing-roughing-medium crushing-concentration process of the present application, all the equipment including various belt conveyors, power units are integrated in the car body, so that the entire ore processing facility is fully mobile, so that the entire processing facility can be quickly moved with the change of the mining area, greatly reducing the transportation cost of raw ore and production cost.

[0053] 4) The system of the present application can drive away the car head after transporting two car plates to a new destination by train, so as to realize other uses of the car head and improve the utilization rate of the car head.

[0054] 5) The system of the present application can feed the products into the concentrate transport train one by one through the concentrate hopper elevator, so as to save the concentrate belt conveyor and storage facilities, and reduce the investment and operation cost.

[0055] 6) The rough crushing-roughing of the system of the present application is integrated in one car body, and the medium crushing-concentration is integrated in one car body. This way of integrating each unit can be independently transported to other mines by train after the service of each unit in the mine, and combined, so as to realize the repeated use of the equipment, improve the utilization rate of the equipment, and avoid asset sinking.

[0056] 7) The rough concentrate and the concentrate of the system of the present application are lifted vertically by the hopper elevator, so as to greatly reduce the distance between adjacent operation sections, and create conditions for integrating all facilities in the train.

[0057] 8) The belt conveyor of the present application is suspended on the side of the car during transportation, and is horizontally below the respective dry separation discharge chute during work. In this way, the positions of the belt conveyor and the all-in-one machine in the transportation state and the working state are not overlapped, so as to create conditions for integrating all facilities in one train.

[0058] 9) The rough crushing-roughing module of the present application integrates the rough crushing gyratory crusher, the roughing unit and the discharge unit from top to bottom on the same longitudinal portal frame, forming an integrated modular arrangement of gyratory crushing and roughing tail throwing, so as to create a gyratory crushing-roughing module. This way has high integration degree, small occupation, and does not need to set up additional independent roughing belt conveyor and roughing plant, reducing equipment investment, plant investment, equipment operation and maintenance cost.

[0059] 10) The medium crushing-concentration module of the present application integrates the medium crushing cone crusher, the concentration unit and the discharge unit from top to bottom on the same longitudinal portal frame, forming an integrated modular arrangement of medium crushing and concentration tail throwing, so as to create a medium crushing-concentration module. This way also has high integration degree, small occupation, and does not need to set up additional independent roughing belt conveyor and roughing plant, reducing equipment investment, plant investment, equipment operation and maintenance cost.

[0060] 11) In the coarse crushing-rough separation module of the present invention, since the feed ore particle size is generally around 1000mm, which cannot be transported by a belt conveyor, a truck trestle is specifically designed for truck transportation. In the medium crushing-cleaning module, since the feed ore particle size is generally 200-300mm, a bucket elevator is used for feeding. The concentrate bucket elevator from the roughing separation also serves as the feeding equipment for the medium crushing-cleaning module. The roughing and cleaning separations share a single waste rock belt conveyor. This connection method successfully achieves simultaneous feeding of the two modules and the sharing of the waste rock discharge belt conveyor. The entire system has a compact structure and simple layout.

[0061] 12) The system of the present invention integrates the entire coarse crushing-coarse selection module and the medium crushing-selection module onto a train car body through their gantry frames. The horizontal transportation state and vertical working state of the module can be switched by pushing the gantry frame with hydraulic rods, thereby quickly realizing the transfer of the module from one mining area to another and ensuring a high working efficiency for the entire operation.

[0062] 13) When the coarse crushing-coarse selection module and the medium crushing-selection module of the present invention are working, they are placed on the foundation through four circular ground anchors at their respective bottoms, so that the vehicle body is not subjected to force during operation, thus protecting the vehicle body.

[0063] 14) In the system of the present invention, when the coarse crushing-coarse selection module and the medium crushing-selection module malfunction, the coarse crushing-coarse selection module and the medium crushing-selection module can be folded back to a horizontal state using a hydraulic push rod. Each part of the coarse crushing-coarse selection module and the medium crushing-selection module is bolted to each layer platform, and each layer platform is bolted to the gantry frame. By removing these bolted connections, the individual parts of the coarse crushing-coarse selection module and the medium crushing-selection module can be vertically lifted out, thereby realizing rapid inspection and maintenance of each component of the module.

[0064] 15) This invention employs a rotary feed inner ring and a fixed annular magnetic separator for coarse crushing, achieving dry separation of material discharged in a circular pattern from the gyratory crusher. Magnetic ore adheres to the outer side of the inner ring of the feed hopper corresponding to the annular magnetic separator. As the inner ring of the feed hopper rotates, the ore is discharged into the ore discharge chamber of the lower discharge hopper, moving away from the corresponding area of ​​the annular magnetic separator. Non-magnetic waste rock that cannot be adsorbed onto the inner ring of the feed hopper is discharged into the waste rock discharge chamber of the lower discharge hopper. This structural method completes the separation and discharge of ore as the discharge from the cone crusher falls vertically. It is compact, occupies little space, and requires less investment.

[0065] 16)The device of the present application, the annular magnetic separation body of the rough separation is an annular body structure, which has a large magnetic separation area, which is conducive to ensuring a high recovery rate of magnetic iron. Moreover, the cross-sectional circumferential angle of the magnetic separation body is 300 degrees, so that most of the circumference is used for magnetic separation, which ensures the separation effect. The remaining 60 degrees of non-magnetic separation area will be the raw materials and dry selected ores as ore products, so the structure avoids the loss of magnetic minerals in the raw materials in the non-magnetic separation area, thereby ensuring the recovery rate of magnetic iron of magnetite and laying the foundation for high yield.

[0066] 17)The device of the present application, the rough separation adopts a rotary magnetic separation method, which fully utilizes the large discharge area and thin material layer of the annular circumferential discharge port of the gyratory crusher, so that the material layer is close to the surface of the annular magnetic separation body, the separation area is large, and the separation effect is optimized, thereby ensuring the obtaining of high-yield iron concentrate products.

[0067] 18)The field strength of the annular magnetic separation body of the present application is 400-600 Mt, which is sufficient to ensure the effective recovery of magnetic ores, and further ensures the high recovery rate of magnetic iron of the dry selected products.

[0068] 19)The rotating motor of the inner ring surface of the rough feeding hopper of the present application is a variable frequency speed regulation motor, so that the separation time of the inner ring surface of the rough feeding hopper in the magnetic separation area can be adjusted, thereby effectively controlling the separation effect.

[0069] 20)The annular magnetic separation body of the rough separation of the present application is built in the rotating inner ring surface, and the annular magnetic separation body does not directly contact the rough crushed large block products, thereby effectively avoiding the beating and smashing of the large block ores on the surface of the annular magnetic separation body, and protecting the annular magnetic separation body.

[0070] 21)The fine selection of the present application adopts an annular electromagnetic magnetic separation body, which realizes the dry selection of the annular circumferential discharge of the cone crusher. The magnetic ores are attached to the outside of the annular magnetic separation body on the 300° annular separation surface, and then are discharged into the ore discharge hopper below with the rotation of the annular magnetic separation body. The waste ores which are not magnetic and cannot be attached to the annular magnetic separation body are discharged into the waste rock discharge cavity below. This structure realizes the separation and discharge of the ores with the vertical falling of the discharge of the gyratory crusher, and has the advantages of compact structure, small space occupation and low investment.

[0071] 22)The fine selection of the present application realizes the re-separation of the ores in the 60° non-separation area in the rough selection, realizes the recovery of the magnetic ores in the ores, and improves the final concentrate yield and recovery rate.

[0072] 23)The selected ring magnetic separation body of the application is a ring body structure, which has a large magnetic separation area and is beneficial to guarantee a high recovery rate of magnetic separation iron. Moreover, the cross-sectional circumferential angle of the magnetic separation body separation zone is 300 degrees, so that most of the circumference is used for magnetic separation, thereby guaranteeing the separation effect. The remaining 60-degree non-magnetic separation zone takes the raw material and the selected ore as the ore product, so that the structure avoids the loss of magnetic minerals in the raw material in the non-magnetic separation zone, thereby guaranteeing the recovery rate of magnetic iron of the magnetite and laying a foundation for high income of the concentrator.

[0073] 24)The selected separation of the application adopts a rotary magnetic separation mode, fully utilizes the thin material layer and large separation area of the annular circumferential discharge port of the cone crusher, makes the material layer close to the surface of the ring magnetic separation body, thereby prevents the situation that the distance is too far and the field strength is too low, so that part of the ore cannot be adsorbed, avoids the loss of part of the magnetite, and guarantees the income.

[0074] 25)The selected separation of the application, the feed hopper and the ring magnet are all ring structures with a small upper opening and a large lower opening and a bus bar inclination angle of 75-85 degrees. Such a structure not only guarantees sufficient separation area, but also ensures sufficient longitudinal rolling separation distance of the material on the ring surface, so that the gradually separated waste rock is realized in the rolling process, thereby gradually improving the grade of the concentrate and guaranteeing the obtaining of high-grade concentrate products.

[0075] 26)The selected separation of the application, the middle of the power connection plate is a power connection groove with a width of only 2-3 cm, the two sides of the power connection groove are insulating rubber, and the power connection switch is a spring type contact quick closing. That is, after the contact and the power connection plate are in contact, the spring is compressed to realize the power supply of the electromagnetic plate and achieve the magnetization of the electromagnetic plate. Such a power connection mode realizes quick power supply and breaking, and eliminates the danger of the contact, thereby guaranteeing safety.

[0076] 27)The selected separation of the application, each separation curved surface plate occupies an annular angle of 10°-20°. After the adsorption separation of the magnetic ore is completed in the separation zone by the power supply and magnetization of the curved surface plate, the curved surface plate enters the ore unloading zone which occupies an annular angle of 60° one by one with the rotation of the magnetic separation body. At this time, the electromagnetic curved surface plate is demagnetized one by one because there is no power connection ring below, and the adsorbed magnetic ore is unloaded. Such a mode forms the continuous separation and unloading operation of each separation curved surface plate, and has high processing efficiency.

[0077] 28)The selected separation of the application, the separation curved surface plate can realize the adjustment of the field strength between 300-500 mT by controlling the size of the connected current, thereby realizing the control and adjustment of the magnetic adsorption of the ore. The variable frequency speed regulation of the rotating motor of the magnetic separation body realizes the adjustment of the separation time of the ore in the separation zone, thereby realizing the control and adjustment of the separation time. Thus, the adjustment and control of the separation magnetic force and the separation time are realized, thereby guaranteeing the obtaining of high-index separated ore products.

[0078] 29)The invention's magnetic selection body is lined with 20-30mm wear-resistant rubber on the outer side, which advantageously guarantees the service life of the magnetic selection body.

[0079] 30)The control signal of the hydraulic push rod, the start-stop and variable frequency signal of the magnetic selection body rotating motor, and the current intensity signal of the power board are all connected with the control box, and the degree of automation is high. BRIEF DESCRIPTION OF DRAWINGS

[0080] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the present application will be described in detail below in combination with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. Among them:

[0081] Figure 1 is a working state sectional view of the high-quality magnet lump ore preparation device of the present application;

[0082] Figure 2 is a transport state plane block diagram of the high-quality magnet lump ore preparation device of the present application;

[0083] Figure 3 is Figure 1 A-A sectional view;

[0084] Figure 4 is Figure 1 B-B sectional view;

[0085] Figure 5 is a working state plane block diagram of the high-quality magnet lump ore preparation device of the present application;

[0086] Figure 6 is a top view and disassembly diagram of the roughing feeding hopper of the present application;

[0087] Figure 7 is a top view and disassembly diagram of the roughing feeding hopper of the present application;

[0088] Figure 8 is a rough crushing-roughing module partial enlarged view of the present application Figure 1 ;

[0089] Figure 9 is a medium crushing-fine selection module partial enlarged view of the present application Figure 1 ;

[0090] Figure: 1- discharge hopper A, 2- frame A, 3- discharge hopper B, 4- frame B, 5- main machine housing A, 6- moving cone A, 7- transmission part A, 8- main machine housing B, 9- moving cone B, 10- transmission part B, 11- coarse crushing-roughing module, 12- medium crushing-concentration module, 13- concentrate delivery train, 14- coarse crushing-roughing module car plate, 15- medium crushing-concentration grinding car plate, 16- rotating shaft A, 17- rotating shaft B, 18- hydraulic push rod A, 19- rotating shaft C, 20- rotating shaft D, 21- hydraulic push rod B, 22- rotating shaft E, 23- rotating shaft F, 24- roughing concentrate belt conveyor, 25- lower support leg A, 26- hanging rod A, 27- hanging shaft A, 28- concentration concentrate belt conveyor, 29- lower support leg B, 30- hanging rod B, 31- hanging shaft B, 32- roughing concentrate bucket elevator, 33- concentration concentrate bucket elevator, 34- discharge chute A, 35- discharge chute B, 36- concentrate delivery train car, 37- roughing concentrate bucket elevator receiving hopper, 38- concentration concentrate bucket elevator receiving hopper, 39- waste rock belt conveyor, 40- waste rock transfer belt conveyor, 41- hydraulic power device, 42- control box, 43- truck ramp, 44- gyratory crusher feeding platform, 45- gyratory crusher base platform, 46- roughing platform, 47- discharge platform A, 48- ground anchor A, 49- transmission part support A, 50- support A, 51- roughing feeding hopper, 52- annular magnetic body A, 53- transmission device, 54- support B, 55- fixed outer ring surface, 56- rotary inner ring surface, 57- inner ring top plate, 58- rotating central shaft A, 59- bearing support, 60- support A, 61- roughing ore discharge hopper, 62- roughing waste rock discharge hopper, 63- cone crusher feeding platform, 64- cone crusher base platform, 65- dry separation platform, 66- discharge platform B, 67- ground anchor B, 68- transmission part support B, 69- support C, 70- concentration feeding hopper, 71- base, 72- annular magnetic body B, 73- circular top plate, 74- rotating central shaft B, 75- base under top plate, 76- variable frequency rotating motor, 77- bearing seat, 78- support B, 79- electromagnetic curved plate, 80- contact switch, 81- power connection ring, 82- power connection groove, 83- concentration ore discharge hopper, 84- concentration waste rock discharge hopper, 85- waste rock discharge port, 86- ore discharge port. DETAILED DESCRIPTION

[0091] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0092] The above and other objects, features and advantages of the present application will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: Figures 1-9 The high-quality magnet lump ore preparation device is further described.

[0093] Embodiment 1

[0094] The high-quality magnet lump ore preparation device of the present application is realized by the following technical scheme:

[0095] The high-quality magnet lump ore preparation device of the present application comprises a coarse crushing-coarse separation module 11, a medium crushing-fine separation module 12, a vehicle-mounted module and a concentrate conveying train 13. The coarse crushing-coarse separation module 11 comprises a foundation pit unit, a coarse crushing unit, a coarse separation unit, a discharge hopper A1 and a rack A2. The medium crushing-fine separation module 12 comprises a discharge hopper B3 and a rack B4. The crushing unit of the coarse crushing-coarse separation module 11 adopts a conventional gyratory crusher, which is composed of a main machine shell A5, a moving cone A6 and a transmission part A7. The crushing unit of the medium crushing-fine separation module 12 adopts a conventional cone gyratory crusher, which is composed of a main machine shell B8, a moving cone B9 and a transmission part B10.

[0096] The vehicle-mounted unit is composed of the coarse crushing-coarse separation module car plate 14 and the medium crushing-fine separation grinding car plate 15 which are connected in series from the tail direction of the train. The upper sides of the two sides of the coarse crushing-coarse separation module car plate 14 are provided with hydraulic push rods A18 which are connected with the rotating shafts 16 of the two sides of the car body and the rotating shafts B17 of the door-shaped racks of the module. The upper sides of the two sides of the medium crushing-fine separation module car plate 15 are provided with hydraulic push rods B21 which are connected with the rotating shafts C19 of the two sides of the car body and the rotating shafts D20 of the door-shaped racks of the module. The tail of the coarse crushing-coarse separation module car plate 14 is connected with the rotating shaft E22 of the tail of the door-shaped rack of the module. The tail of the medium crushing-fine separation module car plate 15 is connected with the rotating shaft F23 of the tail of the door-shaped rack of the module.

[0097] In the transportation state, one side of the coarse crushing-coarse separation module car plate 14 is provided with a coarse separation concentrate belt conveyor 24, and the coarse separation concentrate belt conveyor 24 is connected with the hanging shaft A27 which is longitudinally arranged on the side edge of the car plate through the hanging rods A26 which are arranged at equal intervals on the lower supporting legs A25. One side of the medium crushing-fine separation module car plate 15 is provided with a fine separation concentrate belt conveyor 28, and the fine separation concentrate belt conveyor 28 is connected with the hanging shaft B31 which is longitudinally arranged on the side edge of the car plate through the hanging rods B30 which are arranged at equal intervals on the lower supporting legs B29.

[0098] The outer side of the head of the coarse crushing-coarse separation module car plate 14 is vertically provided with a coarse separation concentrate bucket elevator 32, and the outer side of the head of the medium crushing-fine separation module car plate 15 is vertically provided with a fine separation concentrate bucket elevator 33. The discharge chute A34 of the coarse separation concentrate bucket elevator 32 is located above the medium crushing feeding platform in the working state, and the discharge chute B35 of the fine separation concentrate bucket elevator 33 is located above the carriages 36 of the concentrate conveying train.

[0099] In working state, the rough concentrate belt conveyor 32 and the concentrate belt conveyor 33 are hung out from the hanging shaft of the side of the vehicle body, and are horizontally arranged above the vehicle body and bolted to the bottom platform of the module. The tail of the rough concentrate belt conveyor 32 and the tail of the concentrate belt conveyor 33 are respectively located below the rough concentrate hopper and the concentrate hopper, and the head is respectively located above the rough concentrate hopper conveyor receiving hopper 37 and the concentrate hopper conveyor receiving hopper 38.

[0100] The tail of the waste rock belt conveyor 39 is arranged below the rough waste rock hopper and the concentrate waste rock hopper, and the head of the waste rock belt conveyor 39 passes through the opening of the vehicle plate to enter the independently external waste rock transfer belt conveyor 40 below.

[0101] The rough crushing-roughing module vehicle plate 14 and the medium crushing-concentrate grinding vehicle plate 15 are provided with hydraulic power devices 41 below the respective vehicle plates, and the control signal of the hydraulic push rod is connected with the control box 42.

[0102] The concentrate conveying train 13 is vertically arranged with the ore processing train, and the carriages of the concentrate conveying train 13 pass through the discharge chute below the concentrate concentrate hopper elevator 33 one by one when loaded.

[0103] The foundation pit unit of the rough crushing-roughing module is a pit body with three closed sides and one open side, and the two truck viaducts 43 mirror-imaged arranged on the top of the foundation pit are bolted to the two sides of the circle beam of the feed platform of the gyratory crusher.

[0104] When the hydraulic rods on both sides of the truck body of the rough crushing-roughing module 11 are fully retracted, the door-shaped frame is folded back to be flush with the truck body, and when the hydraulic rods are fully extended, the door-shaped frame is pushed to rotate to be perpendicular to the truck body. Four platforms are connected to the door-shaped frame of the rough crushing-roughing module 11, and from top to bottom, they are the gyratory crusher feed platform 44, the gyratory crusher foundation platform 45, the roughing platform 46 and the discharge platform 47. The four platforms are welded to the door-shaped frame through the four circle beams. When the door-shaped frame is erected, the lower part of the four steel columns of the rectangular cross section of the door-shaped frame is provided with four ground anchors A48, and the ground anchor ground is a circular with a diameter of 500-1000mm. The anchor rod of the four ground anchors is a full thread structure.

[0105] The top of the gyratory crusher of the rough crushing-roughing module 11 is provided with a feed platform for connecting with the feed viaduct. The transmission part support A49 of the gyratory crusher and the support A50 of the crusher are bolted to the gyratory crusher foundation platform.

[0106] The roughing unit is composed of a roughing feed hopper 51, a ring-shaped magnetic separation body A 52 and its transmission device 53. The roughing unit is connected with the roughing base platform through the support B 54 outside the roughing feed hopper. The roughing feed hopper is arranged below the ring-shaped circumferential discharge port of the gyratory crusher, and has an annular cavity with a small upper opening, a large lower opening, and a bus bar inclination angle of 75-85 degrees. This structure not only guarantees sufficient separation area, but also ensures sufficient longitudinal rolling and downward movement of the material on the ring surface, thereby achieving the gradual separation of the waste rock inclusions and gradually improving the grade of the concentrate, thereby guaranteeing the obtaining of high-grade concentrate products. The feed hopper includes a fixed outer ring surface 55, a rotating inner ring surface 56 and an inner ring top plate 57. The upper opening of the outer ring surface of the roughing feed hopper is located 50-100 mm outside the circumferential discharge port of the gyratory crusher, and the upper opening of the inner ring surface is located 50-100 mm inside the circumferential discharge port of the gyratory crusher. The inner ring surface of the roughing feed hopper is of a rotating structure, and the top of the center shaft A 58 is bolted to the top of the feed hopper. The rotating shaft passes through the discharge hopper and is connected with a variable frequency rotating motor. The rotating shaft is connected with the roughing platform through a bearing support 59.

[0107] The roughing magnetic separation device is also an annular magnetic separation body with a small upper opening and a large lower opening. The magnetic separation body is concentrically arranged inside the feed hopper, and the upper end is 100-150 mm away from the lower end of the top plate of the feed hopper, and the outer side is 100-200 mm away from the inner side of the feed hopper. The bus bar inclination angle is consistent with that of the feed hopper. The cross-sectional circumferential angle of the annular body of the roughing rotating magnetic separation device is 300 degrees, and the material is permanent magnet with an outer surface field strength of 400-600 mT. The annular body is connected with the middle layer platform of the rack through its support 60A.

[0108] The roughing discharge hopper is arranged below the feed hopper and includes a roughing ore discharge hopper 61 and a roughing waste rock discharge hopper 62. The waste rock discharge hopper is arranged below the waste rock discharge port 85 formed by the inner ring surface corresponding to the 300-degree annular magnetic separation body and the outer ring surface of the roughing feed hopper. The ore discharge hopper is arranged below the ore discharge port 86 formed by the inner ring surface corresponding to the 60-degree non-annular magnetic separation body and the outer ring surface of the roughing feed hopper. The roughing waste rock and ore discharge hoppers are both ring-shaped at the upper opening and long strip square at the lower opening. The upper openings of the waste rock and ore discharge hoppers are both circumscribed on the outer circle of the ore discharge port and the waste rock discharge port below the feed hopper, and the distance is 50-100 mm. The discharge platform of the coarse crushing-roughing module is located above the roughing concentrate belt conveyor and the waste rock belt conveyor when the module is erected, and the ring beam is open in the middle.

[0109] When the hydraulic rods on both sides of the truck body of the medium crushing-concentration module are fully retracted, the door-shaped frame is folded back to be flush with the truck body. When the hydraulic rods are fully extended, the door-shaped frame is pushed to rotate to be perpendicular to the truck body.

[0110] The door frame of the medium crushing and fine selecting module is connected with four platforms. When the door frame is raised, the four platforms are arranged in sequence from top to bottom as a cone crusher feeding platform 63, a cone crusher base platform 64, a dry selecting platform 65 and a discharge platform B 66. The four platforms are welded with the door frame through four square circle beams. When the door frame is raised, the lower part of the four steel columns with rectangular cross section is provided with four ground anchors B 67. The ground anchors have a circular ground surface with a diameter of 500-1000 mm. The anchor rods of the four ground anchors have a full thread structure.

[0111] The top of the cone crusher of the medium crushing and fine selecting module is provided with a feeding platform for connecting with a discharge chute of an ore bucket elevator of the coarse crushing and coarse selecting module. The drive part support B 68 of the cone crusher and the crusher support C 69 are bolted with the cone crusher base platform.

[0112] The fine selecting unit is composed of a fine selecting feeding hopper 70 and a fine selecting magnetic selecting device. The feeding hopper is arranged below the annular discharge port of the cone crusher and has an annular shell with a small upper opening, a large lower opening and a generatrix inclination angle of 75-85 degrees. The circular upper opening of the feeding hopper is located at the outer side of the cone crusher discharge port by 50-100 mm. The feeding hopper is connected with the middle layer platform of the frame through the base 71 at the outer side thereof.

[0113] The fine selecting magnetic selecting device has an annular magnetic selecting body B 72 with a small upper opening and a large lower opening. The magnetic selecting body is concentrically arranged inside the feeding hopper. The height of the magnetic selecting body is consistent with the height of the feeding hopper. The circular periphery of the magnetic selecting body is located at the inner side of the cone crusher discharge port by 50-100 mm. The generatrix inclination angle of the magnetic selecting body is consistent with that of the fine selecting feeding hopper. The upper opening of the magnetic selecting body is provided with a circular top plate 73. The magnetic selecting body has a rotary structure. The top of the rotary center shaft B 74 is bolted with the base 75 below the top plate. The rotary shaft is connected with a variable frequency rotary motor 76 after passing through the discharge hopper. The rotary shaft is connected with the dry selecting base platform of the door frame through a bearing seat 77. The 360° ring surface of the rotary magnetic selecting body has an electromagnet structure. The surface is lined with 20-30 mm wear-resistant rubber. The outer surface field strength is 250-400 mT. The annular body is connected with the middle layer platform of the frame through the support B 78.

[0114] The discharge hoppers are located below the feed hoppers, including a fine ore discharge hopper 83 and a fine waste rock discharge hopper 84. The fine waste rock discharge hopper is located below the waste rock discharge port formed by the separation surface corresponding to the 300-degree annular electrode plate and the feed hopper. The fine ore discharge hopper is located below the ore discharge port formed by the unloading area corresponding to the 60-degree non-electrified ring and the feed hopper. Both the fine waste rock and ore discharge hoppers are annular at the top and elongated square at the bottom, with their top openings connected to the outer rings of the feed hopper's ore and waste rock discharge ports, at a distance of 50-100mm. When the intermediate crushing-fine cleaning module is erected, the discharge platform is located above the roughing concentrate belt conveyor and the waste rock belt conveyor, with its ring beam open in the middle.

[0115] Example 2

[0116] like Figures 1-9 As shown, a high-quality magnetite ore preparation device of the present invention includes a coarse crushing-roughening module, a medium crushing-cleaning module, a vehicle-mounted module, and a concentrate conveying train. The coarse crushing-roughening module includes a pit unit, a coarse crushing unit, a roughing unit, a discharge hopper, and a frame. The medium crushing-cleaning module includes a medium crushing unit, a cleaning unit, a discharge hopper, and a frame. The crushing unit of the coarse crushing-roughening module adopts a traditional cone gyratory crusher, consisting of a main housing, a moving cone, and a transmission unit. The crushing unit of the medium crushing-cleaning module also adopts a traditional cone gyratory crusher, consisting of a main housing, a moving cone, and a transmission unit. This invention integrates coarse crushing and rough separation into a single machine, and medium crushing and fine separation into another, achieving a high degree of integration across coarse crushing, rough separation, medium crushing, and fine separation. The final product particle size is reduced to 50-80mm after medium crushing, meeting the requirements for direct furnace feeding in smelting. Through a two-stage separation process with decreasing field strength, rough separation removes gangue and surrounding rock, while fine separation removes low-grade ore and intergrowths. This two-stage, gradual release method achieves a significant grade improvement from 50%-60% grade ore, ultimately reaching a concentrate grade of 62%-65%. Thus, high-quality, high-priced iron concentrate is obtained through simple process and equipment integration, resulting in low cost and high efficiency. The integrated coarse crushing, rough separation, medium crushing, and fine separation equipment is placed on a single train, eliminating the need for separate crushing and dry separation workshops in traditional fixed plant buildings, thus reducing infrastructure investment. All equipment in the coarse crushing-coarse separation-medium crushing-fine cleaning process of this invention, including each belt conveyor and power unit, are integrated into the vehicle body, thereby realizing the full mobility of the entire ore processing facility. This allows the entire processing facility to be quickly relocated as the mining area changes, greatly reducing the transportation cost of raw ore and lowering production costs.

[0117] The vehicle-mounted unit is composed of coarse crushing-roughing module car plates, medium crushing-concentration module car plates, which are connected in series from the tail direction of the train.

[0118] One side of the coarse crushing-roughing module car plate is provided with a roughing concentrate belt conveyor, which is horizontally hung on one side of the car plate through hooks arranged at equal intervals on the lower plate and hooks on the rotating shaft arranged longitudinally on the side edge of the car plate; the other side of the coarse crushing-roughing module car plate is horizontally hung with the tail section of the waste rock belt conveyor in the same way. One side of the medium crushing-concentration module car plate is provided with a concentration concentrate belt conveyor, which is horizontally hung on one side of the car plate through hooks arranged at equal intervals on the lower plate and hooks on the rotating shaft arranged longitudinally on the side edge of the car plate; the other side of the medium crushing-concentration module car plate is horizontally hung with the head section of the waste rock belt conveyor in the same way. The coarse crushing-roughing module of the present application integrates the coarse crushing gyratory crusher, the roughing unit and the discharge unit from top to bottom in the same longitudinal door frame, forming an integrated modular arrangement of gyratory crushing and roughing tail throwing, thereby creating a gyratory crushing-roughing module.

[0119] The head outside of the coarse crushing-roughing module car plate is vertically provided with a roughing concentrate bucket elevator, and the head outside of the medium crushing-concentration module car plate is vertically provided with a concentration concentrate bucket elevator. The roughing concentrate bucket elevator is located above the medium crushing feeding platform in the working state, and the concentration concentrate bucket elevator is located above the concentrate conveying train compartment.

[0120] The intermediate frame of the roughing concentrate belt conveyor and the concentration concentrate belt conveyor is connected with a bottom plate, and walking wheels are arranged on both sides below the bottom plate. In the working state, when the roughing concentrate belt conveyor and the concentration concentrate belt conveyor are turned to horizontal through the rotating shafts on both sides of the car plate, the head sections of the roughing concentrate belt conveyor and the concentration concentrate belt conveyor are located above the roughing concentrate bucket elevator and the concentration concentrate bucket elevator, respectively.

[0121] The tail section and the head section of the waste rock belt conveyor are rotated to be horizontal through the rotating shaft, and then are moved to the lower side of the roughing waste rock hopper and the fine waste rock hopper through the pair of wheel sets under the bottom plate, and the gap section in the middle is connected with the middle section and the tail section through the connecting string hole. After the waste rock belt conveyor is connected, the belt of the waste rock belt conveyor is threaded. The head section of the waste rock belt conveyor is threaded into the waste rock transfer belt conveyor which is independently arranged outside through the opening of the car plate.

[0122] The head section, the tail section and the connecting section of the waste rock belt conveyor are bolted with the car plate in the working state. The connecting section of the waste rock belt conveyor is hung at the head end of the car plate in the working state. The hydraulic power device of each car plate is arranged below the coarse crushing-roughing module car plate and the medium crushing-fine grinding car plate, and the control signal of the hydraulic push rod is connected with the control box.

[0123] The car rail of the concentrate delivery train is arranged vertically with the car rail of the ore processing train, and the car of the concentrate delivery train is loaded one by one under the discharge hopper of the fine concentrate bucket elevator.

[0124] The foundation pit unit of the coarse crushing-roughing module is a pit body with three closed sides and one open side. The two truck viaducts arranged in mirror image on the top of the foundation pit are bolted with the two side beams of the feeding platform of the gyratory crusher.

[0125] When the hydraulic rods on both sides of the truck body of the coarse crushing-roughing module are fully retracted, the door-shaped frame is folded back to be flush with the truck body, and when the hydraulic rods are fully extended, the door-shaped frame is pushed to rotate to be perpendicular to the truck body. Four platforms are connected to the door-shaped frame of the coarse crushing-roughing module. When the door-shaped frame is raised, they are arranged in order from top to bottom as the gyratory crusher feeding platform, the gyratory crusher foundation platform, the roughing platform and the discharge platform. The four platforms are welded with the door-shaped frame through the four square beams. When the door-shaped frame is raised, the lower part of the four steel columns with rectangular cross section is provided with four ground anchors, and the ground surface of the ground anchor is a circular hole with a diameter of 500-1000 mm. The anchor rod of the four ground anchors is a full-thread structure.

[0126] The top of the gyratory crusher of the coarse crushing-roughing module is provided with a feeding platform for connecting with the feeding viaduct. The transmission part of the gyratory crusher and the support of the crusher are bolted with the gyratory crusher foundation platform.

[0127] The rough selection unit is composed of a rough selection feeding hopper, a ring-shaped magnetic selection body and its transmission device. The rough selection unit is bolted to the rough selection base platform through the support outside the rough selection feeding hopper. The rough selection feeding hopper is arranged below the ring-shaped discharge port of the gyratory crusher, has an annular cavity with a small upper opening and a large lower opening, and a bus bar inclination angle of 75-85 degrees. The feeding hopper comprises a fixed outer ring surface, a rotary inner ring surface and an inner ring top plate. The upper opening of the outer ring surface of the rough selection feeding hopper is located 50-100 mm outside the circumferential discharge port of the gyratory crusher, and the upper opening of the inner ring surface is located 50-100 mm inside the circumferential discharge port of the gyratory crusher. The inner ring surface of the rough selection feeding hopper is of a rotary structure, the top of the center axis of the rotary structure is bolted to the top of the feeding hopper, the rotary shaft is connected to a variable frequency rotary motor after passing through the discharge hopper, and the rotary shaft is connected to the dry selection base platform through bearings.

[0128] The rough selection magnetic selection device also has an annular magnetic selection body with a small upper opening and a large lower opening, which is concentrically arranged inside the feeding hopper, has an upper end at a distance of 100-150 mm from the lower end of the top plate of the feeding hopper, and has an outer end at a distance of 100-200 mm from the inner side of the feeding hopper, and has a bus bar inclination angle consistent with that of the feeding hopper. The annular body of the rough selection rotary magnetic selection device has a cross-sectional circumferential angle of 300 degrees, is made of permanent magnet, and has an outer surface field strength of 400-600 mT. The annular body is bolted to the middle layer platform of the frame through its support.

[0129] The rough selection discharge hopper is arranged below the feeding hopper, comprises a rough selection ore discharge hopper and a rough selection waste rock discharge hopper, the waste rock discharge hopper is arranged below the waste rock discharge port formed by the inner ring surface corresponding to the 300-degree annular magnetic selection body and the outer ring surface of the rough selection feeding hopper, and the ore discharge hopper is arranged below the ore discharge port formed by the inner ring surface corresponding to the 60-degree non-annular magnetic selection body and the outer ring surface of the rough selection feeding hopper. The discharge hoppers of the rough selection waste rock and ore both have a ring-shaped upper opening and a long strip square lower opening, and the upper openings of the discharge hoppers of the waste rock and ore are both circumscribed to the outer circle of the ore discharge port and the waste rock discharge port below the feeding hopper at a distance of 50-100 mm. The discharge platform of the coarse crushing-rough selection module is located above the rough selection concentrate belt conveyor and the waste rock belt conveyor when the module is erected, and the middle of the ring beam is open.

[0130] The hydraulic rods on both sides of the truck body of the medium crushing-rough selection module are fully retracted to fold back to be flush with the truck body, and are fully extended to push the door-shaped frame to rotate to be perpendicular to the truck body.

[0131] Four platforms are connected to the door-shaped frame of the medium crushing-rough selection module, and from top to bottom, the platforms are a cone crusher feeding platform, a cone crusher base platform, a dry selection platform and a discharge platform when the door-shaped frame is raised. The four platforms are all welded to the door-shaped frame through four square ring beams. When the door-shaped frame is erected, the lower parts of the four steel columns of the rectangular cross section of the door-shaped frame are provided with four ground anchors, the ground surface of the ground anchors is a circle with a diameter of 500-1000 mm, and the anchor rods of the four ground anchors are full-thread structures.

[0132] The top of the cone crusher of the medium crushing-selecting module is provided with a feeding platform for connecting with the head of the ore belt conveyor of the coarse crushing-coarse selecting module. The driving part of the cone crusher and the support of the crusher are bolted to the base platform of the cone crusher.

[0133] The selecting unit is composed of a selecting feeding hopper and a selecting magnetic separation device. The feeding hopper is an annular shell with a small upper opening and a large lower opening and a generatrix inclination angle of 75-85 degrees. The circular upper opening of the feeding hopper is located 50-100 mm outside the circumferential discharge opening of the cone crusher. The feeding hopper is bolted to the middle layer platform of the frame through the base outside the feeding hopper.

[0134] The selecting magnetic separation device is an annular magnetic separation body with a small upper opening and a large lower opening. The magnetic separation body is concentrically arranged inside the feeding hopper. The height of the magnetic separation body is consistent with the height of the feeding hopper. The circumferential upper edge of the magnetic separation body is located 50-100 mm inside the circumferential discharge opening of the cone crusher. The generatrix inclination angle of the magnetic separation body is consistent with that of the selecting feeding hopper. The upper opening of the magnetic separation body is provided with a circular top plate, and the lower opening is provided with a circular bottom plate. The magnetic separation body is a rotary structure. The top of the rotating central shaft of the magnetic separation body is bolted to the base below the top plate. The rotating shaft is connected to a variable frequency rotating motor after passing through the discharge hopper. The rotating shaft is bolted to the dry separation base platform of the gate-shaped support through the bearing seat. The 360° ring surface of the rotary magnetic separation body is an electromagnet structure. The surface is lined with 20-30 mm of wear-resistant rubber, which advantageously guarantees the service life of the magnetic separation body. The outer surface field strength is 250-400 mT. The annular body is bolted to the middle layer platform of the frame through the support. The electromagnet ring surface is spliced from the same size electromagnet curved panels. Each electromagnet curved panel covers an angle of 10-20° on the ring surface. The inner side below each electromagnet curved panel of the electromagnet is provided with a contact switch. The contact switch is a spring contact switch. The inner side of the magnetic ring surface on the circular bottom plate of the magnetic separation body is provided with an electric contact ring. The thickness of the contact ring is 1-3 cm. The longitudinal beam of the discharge section is not provided with an electric contact plate. The electric contact ring is provided with an electric contact groove with a width of 2-3 cm. The electric contact groove is located directly below the contact switch. The two sides of the electric contact groove are insulated rubber. The circumferential angle of the electric contact ring is 300°. The current intensity of the electric contact plate is adjustable. The start-stop and variable frequency signals of the rotating motor of the selecting electromagnet magnetic separation body are connected to the control box. The current intensity signal of the electric contact plate is also connected to the control box.

[0135] The discharge hopper is arranged below the feeding hopper, including a fine ore discharge hopper and a fine waste rock discharge hopper, the fine waste rock discharge hopper is arranged below a waste rock discharge port formed by a 300-degree annular power receiving plate corresponding to a separation surface and the feeding hopper, and the fine ore discharge hopper is arranged below an ore discharge port formed by a 60-degree non-power receiving ring corresponding to a discharging area and the feeding hopper. The discharge hoppers of the fine waste rock and the fine ore are both of a closed hopper type with an annular upper opening and a long strip square lower opening, and the upper openings of the discharge hoppers of the waste rock and the ore are both circumscribed to the outer circle of the ore discharge port and the waste rock discharge port of the feeding hopper with a distance of 50-100 mm. The discharge platform of the medium crushing-fine selection module is arranged above the coarse selection fine ore belt conveyor and the waste rock belt conveyor, and the middle of the ring beam is open.

[0136] The coarse selection of the application adopts a rotary feeding inner ring surface and a fixed annular magnetic selection body, realizes dry selection of the annular circumferential discharge of the coarse crushing gyratory crusher, and the magnetic ore is attached to the outside of the inner ring surface of the feeding hopper corresponding to the annular magnetic selection body, and is discharged into the ore discharge cavity of the lower discharge hopper until the annular magnetic selection body corresponding area is turned away, and the adsorbed ore is discharged; the waste rock without magnetism cannot be adsorbed on the inner ring surface of the feeding hopper and is discharged into the waste rock discharge cavity of the lower discharge hopper. This structure realizes the separation and ore discharge with the vertical falling of the discharge of the cone crusher, is compact in structure, occupies small space, and saves investment.

[0137] The annular magnetic selection body of the device of the application is an annular body structure, which is beneficial to guarantee the high recovery rate of the magnetic selection iron. And the cross-sectional circumferential angle of the magnetic selection body is 300 degrees, so that most of the circumference is used for magnetic selection, which guarantees the separation effect. The remaining 60-degree non-magnetic selection area takes the raw materials of the feeding and the dry selected ore as ore products, so that the structure avoids the loss of magnetic minerals in the feeding raw materials in the non-magnetic selection area, thereby guaranteeing the recovery rate of the magnetic iron of the magnetite, and laying a foundation for high yield.

[0138] The control signals of the hydraulic push rod, the start-stop and frequency conversion signals of the magnetic selection body rotating motor, and the current intensity signals of the power receiving plate are all connected with the control box, and the degree of automation is high.

Claims

1. A high-quality magnet lump ore production device, characterized by, The application relates to a rough crushing and rough separation module (11) connected with a medium crushing and fine separation module (12), wherein the rough crushing and rough separation module (11) and the medium crushing and fine separation module (12) are respectively connected with a vehicle-mounted module; a concentrate conveying train (13) is connected with the vehicle-mounted module; the rough crushing and rough separation module (11) comprises a foundation pit unit with a built-in rack A (2); a rough crushing unit and a rough separation unit are connected with the rack A (2), and the rough separation unit is connected with the rough crushing unit; a discharge hopper A (1) is connected with the rough separation unit; the medium crushing and fine separation module (12) comprises a medium crushing unit and a fine separation unit, both of which are connected with a rack B (4); a discharge hopper B (3) is connected with the fine separation unit; the rough crushing unit comprises a main machine shell A (5) with a built-in dynamic cone A (6) and a transmission part A (7) connected with the dynamic cone A (6); the medium crushing unit comprises a main machine shell B (8) with a built-in dynamic cone B (9) and a transmission part B (10) connected with the dynamic cone B (9); the vehicle-mounted module comprises a rough crushing and rough separation module vehicle plate (14) and a medium crushing and fine separation grinding vehicle plate (15), wherein the rough crushing and rough separation module vehicle plate (14) and the medium crushing and fine separation grinding vehicle plate (15) are connected; upper sides of both sides of the rough crushing and rough separation module vehicle plate (14) are provided with hydraulic push rods A (18) connected with rotating shafts A (16) on both sides of a vehicle body and rotating shafts B (17) on both sides of a door-shaped rack of a module; upper sides of both sides of the medium crushing and fine separation grinding vehicle plate (15) are provided with hydraulic push rods B (21) connected with rotating shafts C (19) on both sides of the vehicle body and rotating shafts D (20) on both sides of the door-shaped rack of the module; a tail part of the rough crushing and rough separation module vehicle plate (14) is connected with a tail rotating shaft E (22) of the door-shaped rack of the module; a tail part of the medium crushing and fine separation grinding vehicle plate (15) is connected with a tail rotating shaft F (23) of the door-shaped rack of the module; when in a transportation state, one side of the rough crushing and rough separation module vehicle plate (14) is provided with a rough separation concentrate belt conveyor (24), the rough separation concentrate belt conveyor (24) is connected with a hanging shaft A (27) arranged longitudinally on a side edge of the vehicle plate through hanging rods A (26) arranged at equal intervals on lower supporting legs A (25) of the rough separation concentrate belt conveyor (24); one side of the medium crushing and fine separation grinding vehicle plate (15) is provided with a fine separation concentrate belt conveyor (28), the fine separation concentrate belt conveyor (28) is connected with a hanging shaft B (31) arranged longitudinally on a side edge of the vehicle plate through hanging rods B (30) arranged at equal intervals on lower supporting legs B (29) of the fine separation concentrate belt conveyor (28); a rough separation concentrate bucket elevator (32) is vertically arranged on an outer side of a head part of the rough crushing and rough separation module vehicle plate (14); a fine separation concentrate bucket elevator (33) is vertically arranged on an outer side of a head part of the medium crushing and fine separation grinding vehicle plate (15). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The discharge chute A (34) of the rough concentrate bucket elevator (32) is located above the medium crushing feeding platform in the working state, and the discharge chute B (35) of the concentrate bucket elevator (33) is located above the concentrate transport train carriage (36); In the working state, the rough concentrate bucket elevator (32) and the concentrate bucket elevator (33) are horizontally arranged above the vehicle body after being hung out from the shaft on the side of the vehicle body and connected with the bottom platform of the vehicle plate, the tail of the rough concentrate bucket elevator (32) and the concentrate bucket elevator (33) is respectively located below the rough concentrate bucket and the concentrate bucket, and the head is respectively located above the rough concentrate bucket conveyor receiving hopper (37) and the concentrate bucket conveyor receiving hopper (38); The tail of the waste rock belt conveyor (39) is arranged below the rough waste rock bucket and the concentrate waste rock bucket, and the head of the waste rock belt conveyor (39) passes through the opening of the vehicle plate to enter the independently external waste rock transfer belt conveyor (40) below; The rough crushing-roughing module vehicle plate (14) and the medium crushing-concentrating grinding vehicle plate (15) are respectively provided with a hydraulic power device (41) below the vehicle plate, and the hydraulic power device (41) is connected with a control box (42); The concentrate transport train (13) is vertically arranged with the ore processing train, and the carriages of the concentrate transport train (13) pass below the discharge chute B (35) of the concentrate concentrate bucket elevator (33) one by one when loaded; The foundation pit unit is a pit body with three closed sides and one open side, and two truck viaducts (43) mirror-imaged arranged on the top of the foundation pit are connected with the circle beams on both sides of the gyratory crusher feeding platform (44); When the hydraulic rods on both sides of the truck body of the rough crushing-roughing module (11) are fully retracted, the door-shaped frame is folded back to be flush with the truck body, and when the hydraulic rods are fully extended, the door-shaped frame is pushed to rotate to be perpendicular to the truck body; four platforms are connected to the door-shaped frame of the rough crushing-roughing module (11), and from top to bottom, they are the gyratory crusher feeding platform (44), the gyratory crusher foundation platform (45), the roughing platform (46) and the discharge platform A (47) when the door-shaped frame is raised; the four platforms are welded with the door-shaped frame through four square circle beams; when the door-shaped frame is raised, the lower parts of the four steel columns of the rectangular cross section of the door-shaped frame are provided with four ground anchors A (48), and the anchor rods of the four ground anchors A (48) are full-thread structures.

2. The high-quality magnet lump ore preparation device according to claim 1, characterized by, The gyratory crusher feeding platform (44) of the rough crushing-roughing module (11) is connected with the feeding viaduct; the transmission part support A (49) of the gyratory crusher and the crusher support A (50) are connected with the gyratory crusher foundation platform; The roughing unit includes a roughing feeding bucket (51), a ring-shaped magnetic selection body A (52) and a transmission device (53), the ring-shaped magnetic selection body A (52) is arranged in the roughing feeding bucket (51), the ring-shaped magnetic selection body A (52) is connected with the transmission device (53), and the roughing feeding bucket (51) is connected with the roughing foundation platform through the support B (54) on the outside of the roughing feeding bucket (51); the roughing feeding bucket (51) is arranged below the gyratory crusher ring-shaped circumferential discharge port, and is an annular cavity with a small upper opening, a large lower opening, a bus bar inclination angle of 75-85 degrees; The rough feeding hopper (51) comprises a fixed outer ring surface (55), a rotary inner ring surface (56) and an inner ring top plate (57); the upper opening of the fixed outer ring surface (55) of the rough feeding hopper (51) is located outside the peripheral discharge port of the gyratory crusher, and the upper opening of the rotary inner ring surface (56) is located inside the peripheral discharge port of the gyratory crusher; the rotary inner ring surface (56) of the rough feeding hopper (51) is of a rotary structure, the top of the rotating central shaft A (58) is connected to the top of the rough feeding hopper (51) below, the rotating central shaft A (58) passes through the rough feeding hopper (51) and is connected to a variable-frequency rotating motor (76), and the rotating central shaft A (58) is connected to the rough selection platform through a bearing support (59).

3. The high-quality magnet lump ore preparation device according to claim 2, characterized in that, The rough discharge hopper is arranged below the rough feeding hopper (51) and comprises a rough ore discharge hopper (61) and a rough waste rock discharge hopper (62); the rough waste rock discharge hopper (62) is arranged below the waste rock discharge port (85) formed by the inner ring surface corresponding to the 300-degree annular magnetic selection body and the outer ring surface of the rough feeding hopper (51); and the rough ore discharge hopper (61) is arranged below the ore discharge port (86) formed by the inner ring surface corresponding to the 60-degree non-annular magnetic selection body and the outer ring surface of the rough feeding hopper (51).

4. The high-quality magnet lump ore preparation device according to claim 1, characterized in that, The door-shaped frame of the medium crushing and fine selection module (12) is connected to four platforms; when the door-shaped frame is raised, the four platforms are arranged in sequence from top to bottom as a conical crusher feeding platform (63), a conical crusher base platform (64), a dry selection platform (65) and a discharge platform B (66); the four platforms are welded to the door-shaped frame through a four-square beam; when the door-shaped frame is raised, the lower part of the four steel columns of the rectangular cross section is provided with four ground anchors B (67); the anchor rods of the four ground anchors B (67) are of a full-thread structure; The top of the conical crusher of the medium crushing and fine selection module (12) is provided with a feeding platform for being connected to the discharge chute A (34) of the ore bucket elevator of the rough crushing and rough selection module; the transmission part support B (68) of the conical crusher and the support C (69) of the crusher are connected to the conical crusher base platform.

5. The high-quality magnet lump ore preparation device according to claim 1, characterized by, The fine selection unit is composed of a fine selection feeding hopper (70) and a fine selection magnetic selection device; the fine selection feeding hopper (70) is arranged below the annular peripheral discharge port of the conical crusher and has an annular shell with a small upper opening and a large lower opening and a bus bar inclination angle of 75-85 degrees; the circular upper opening of the fine selection feeding hopper (70) is located outside the peripheral discharge port of the conical crusher; the fine selection feeding hopper (70) is connected to the middle layer platform of the frame through the base (71) on the outside thereof.

6. The high-quality magnet lump ore preparation device according to claim 5, characterized by, The fine selection magnetic selection device is of an annular magnetic selection body B (72) with a small upper opening and a large lower opening; the annular magnetic selection body B (72) is concentrically arranged inside the fine selection feeding hopper (70); the height of the annular magnetic selection body B (72) is consistent with the height of the fine selection feeding hopper (70). The circumferential surface of the annular magnetic separation body B (72) is located inside the discharge port of the cone crusher, and the dip angle of the generatrix is consistent with the dip angle of the fine separation feed hopper; the upper end of the annular magnetic separation body B (72) is provided with a circular top plate (73); The annular magnetic separation body B (72) is a rotary structure, the top of the rotating center shaft B (74) is connected with the base (75) below the top plate, the rotating center shaft B (74) passes through the fine separation ore discharge hopper (83) and is connected with the variable frequency rotating motor (76), and the rotating center shaft B (74) is connected with the dry separation foundation platform of the portal support through the bearing seat (77); The 360° annular surface of the annular magnetic separation body B (72) is an electromagnet structure, and the surface is lined with wear-resistant rubber, and the outer surface field strength is 250-400 mT. The annular magnetic separation body B (72) is connected with the middle layer platform of the rack through the support B (78) of the annular magnetic separation body B (72); The annular surface of the annular magnetic separation body B (72) is an electromagnet structure, and the surface is lined with wear-resistant rubber, and the outer surface field strength is 250-400 mT. The annular magnetic separation body B (72) is connected with the middle layer platform of the rack through the support B (78) of the annular magnetic separation body B (72); Each electromagnetic curved panel (79) covers an angle of 10-20° on the annular surface; The inner side of each electromagnetic curved panel (79) is provided with a contact switch (80) below, and the contact switch (80) is a spring contact switch; 7. The high-quality magnetite ore preparation device according to claim 5, characterized in that, The inner side of the magnetic annular surface on the circular bottom plate of the annular magnetic separation body B (72) is provided with an electric connection ring (81), and the electric connection groove (82) is arranged in the middle of the electric connection ring (81), the electric connection groove (82) is arranged directly below the contact switch (80), and the two sides of the electric connection groove (82) are insulated rubber. The fine separation discharge hopper is arranged below the fine separation feed hopper (70) and includes a fine separation ore discharge hopper (83) and a fine separation waste rock discharge hopper (84), the fine separation waste rock discharge hopper (84) is arranged below the waste rock discharge port formed by the separation surface corresponding to the 300-degree annular electric connection plate and the feed hopper, and the fine separation ore discharge hopper is arranged below the fine separation waste rock discharge hopper (84) formed by the ore unloading area corresponding to the 60-degree non-electric connection ring and the feed hopper; The discharge hoppers of the fine separation waste rock and ore are both of the collection type with a circular upper opening and a long strip square lower opening, and the upper openings of the discharge hoppers of the waste rock and ore are both circumscribed to the outer circle of the ore discharge port and the waste rock discharge port of the feed hopper.

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