Quasi-vertical ring superconducting high gradient magnetic separator and its use method

Abstract

The present invention relates to a vertical ring-type superconducting high-gradient magnetic separator and a method for using the same. One side of the magnetic separator is a magnetic separation zone and the other side is a cleaning zone. A magnetic medium box is mutually transferred between the two zones. The magnetic separation zone includes a superconducting magnetic system, a slurry distributor, a sorting tank, and a magnetic medium box driving device. The superconducting magnetic system is located in the middle of the magnetic separation zone, and a superconducting coil is provided in the middle, in which a slurry distributor and a sorting tank are respectively installed. The sorting tank includes a sorting shell. The upper part of the sorting shell accommodates the slurry distributor and the water distributor cavity. The lower part of the sorting tank is a discharge chamber. A magnetic medium box string channel is formed between the top of the discharge chamber and the bottom of the slurry distributor and the water distributor cavity. The cleaning zone includes a cleaning tank, and a conveying device is provided on the upper part of the cleaning tank, and the bottom of the cleaning tank is a recovery hopper. The present invention utilizes a superconducting magnetic system to provide a higher magnetic separation capability, and has the potential to obtain higher quality products in the two application directions of extracting magnetic concentrate and removing impurities and purifying non-metallic ores.

Description

Technical Field

[0001] The invention relates to a magnetic separator utilizing superconductivity for magnetic separation, in particular to a magnetic separator utilizing a vertical ring-like structure design, and belongs to the field of superconductivity magnetic separation. Background Art

[0002] The vertical ring high gradient magnetic separator is developed from the vertical high gradient magnetic separator. The magnetic medium continuously enters and exits the magnetic field as the rotating ring rotates, so that the adsorption in the field and the cleaning outside the field can be carried out continuously. It also allows the residence time of the magnetic medium in the magnetic field to be controlled by controlling the rotating ring speed, breaking through the limitation of the saturation time of the magnetic medium. The vertical ring high gradient magnetic separator replaces the periodic rising and falling magnetic field with a steady magnetic field, simplifies the magnetic separation process, improves the separation effect and magnetic separation efficiency (concentrate output per unit time), and becomes the main equipment in the magnetic separation industry.

[0003] In general, the vertical ring high gradient magnetic separator has excellent performance in two application directions of magnetic separation. One is to extract magnetic concentrates from metal ores, such as hematite and limonite; the other is to remove magnetic impurities from non-metallic ores. In order to meet the separation effect and magnetic separation efficiency, the equipment is constantly developing in the direction of increasing the magnetic field strength and magnetic field space. The arc spanned by the magnetic field space is generally about 100°, so in order to increase the arc length, the diameter of the rotating ring has developed from 1m to 3m, and the magnetic field strength has developed from 1.0T, 1.3T, to the current 1.8T. On the one hand, it is very difficult to continue to increase the magnetic field strength due to the limitation of the saturation magnetic permeability of the magnetic pole material; on the other hand, increasing the field strength and increasing the magnetic field space doubles the power consumption of the excitation coil, such as the power consumption of 1.0T field strength is 105kW, while the power consumption of 1.8T field strength reaches 211kW.

[0004] As an alternative, establishing a high-field strength and large-volume magnetic field space is the advantage of superconducting magnetic systems, and when the magnetic field strength reaches 5 T, superconducting magnetic systems still have a high cost-effectiveness. However, due to the limitation of huge magnetic field force, currently only the magnetic system of solenoid coil plus iron screen can meet the reliable, strong and durable industrial standards, and this magnetic system can only provide a constant strong magnetic field in a cylindrical space, and cannot use magnetic poles to generate strong magnetic fields like vertical ring magnetic systems, but can change the shape of the strong magnetic field area by changing the shape of the magnetic poles.

[0005] The double-station sorting device with Chinese patent publication number CN111744665A has a magnetic medium that periodically enters the magnetic field station and the cleaning station along with the reciprocating linear motion mechanism. Continuous feeding is not possible during the switching between the two stations, and the magnetic separation efficiency is limited by the saturation time of the magnetic medium and the station switching time.

[0006] The rotating ring type continuous feeding superconducting magnetic separator with Chinese patent publication number CN211838454U uses a flexible chain structure to replace the rigid rotating ring in the vertical ring magnetic separator. The magnetic medium boxes are the links of the chain and are connected to each other by the chain. The driving wheel drives the magnetic medium box chain to rotate continuously through the engagement between its own gear teeth and the protrusions on the side of the magnetic medium box. However, this design: the moving parts including the shaft and sleeve connected by the chain, the roller shaft and bearing supporting the magnetic medium box are all located outside the magnetic medium box and inside the receiving pool. The generated metal shavings can easily enter the non-magnetic mineral products and cause secondary pollution, and the large number of moving parts increases the probability of damage and the frequency of maintenance; and the slurry level is lower than the magnetic medium box, resulting in one of the key process parameters of high gradient magnetic separation - the slurry flow rate inside the magnetic medium box is mainly determined by gravity and is almost impossible to adjust, resulting in equipment parameters and other process parameters can only be matched according to the magnetic separation effect, which leads to poor adaptability of the equipment to different minerals; and, on the chain, for the magnetic separation process, only the magnetic medium boxes located in the magnetic adsorption area inside the field and the cleaning area outside the field are effective, and this part of the magnetic medium boxes only accounts for 1 / 4 to 1 / 3 of the total, and the remaining magnetic medium boxes only function to drive and form a complete chain, resulting in a lower utilization rate of the magnetic medium boxes.

[0007] In the magnetic field space, the above two patents both adopt the method of discharging materials by inclined self-flow; for many minerals with strong sedimentation, increasing the inclination angle of the inclined plane will occupy more magnetic field space, resulting in a decrease in the utilization rate of the magnetic field space. That is, the cylindrical magnetic field space determines the in-field feeding and in-field discharging, which in turn determines the contradiction between the method of discharging materials by inclined self-flow and the utilization rate of the magnetic field space.

[0008] In view of the shortcomings of the existing technology, it is necessary to further improve the magnetic separator, especially to absorb some advantages so that the magnetic separator can better meet the needs of industrial mineral processing. Summary of the invention

[0009] The purpose of the present invention is to provide a vertical ring-type superconducting high gradient magnetic separator and a method of using the same, which adopts a superconducting magnetic system as the magnetic field and designs a magnetic medium box string to cross the magnetic field for mineral processing; simplifies the equipment structure design, so as to better meet the needs of industrial mineral processing.

[0010] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a vertical ring-type superconducting high-gradient magnetic separator, one side of which is a magnetic separation area and the other side is a cleaning area, and the magnetic medium box is transferred between the two areas to form a circular motion of the magnetic medium box;

[0011] The magnetic separation area mainly includes a superconducting magnetic system, a slurry distributor, a separation tank, and a magnetic medium box drive device;

[0012] The superconducting magnetic system is located in the middle of the magnetic separation area, with a superconducting coil in the middle. The inner side of the superconducting coil is a magnetic field cavity, which is a cylindrical cavity. A ferromagnetic shield is provided on the outer side of the superconducting coil. Both ends of the cylindrical cavity of the magnetic field cavity extend outward to both ends of the ferromagnetic shield to form a cylindrical installation cavity. A slurry distributor and a separation tank are respectively installed in the installation cavity.

[0013] The length of the slurry distributor is greater than the length of the ferromagnetic shield, and the slurry distributor is located at the upper part of the installation chamber;

[0014] The middle of the slurry and water distributor is a slurry and water distribution chamber, which is located in the installation chamber; the interior of the slurry and water distribution chamber forms two relatively independent slurry distribution chambers and water distribution chambers; the bottoms of the slurry distribution chamber and the water distribution chamber are provided with outlet holes;

[0015] The two ends of the pulp and water distribution chamber extend outwards, and are respectively provided with a pulp inlet and a water inlet; the pulp inlet and the water inlet are both located outside the two ends of the ferromagnetic shield; the pulp distribution chamber is connected to the pulp inlet and is located on the input side of the magnetic separation zone; the water distribution chamber is connected to the water inlet and is located on the output side of the magnetic separation zone;

[0016] The length of the sorting tank is greater than the length of the pulp and water distributor; the sorting tank comprises a sorting shell, the interior of which is a cavity; the middle part of the sorting shell is a cylindrical tube, which is installed in the magnetic field cavity, and the upper part of the sorting shell accommodates the pulp and water distribution cavity;

[0017] The lower part of the sorting tank is a discharge chamber; a magnetic medium box series channel is formed between the top of the discharge chamber and the bottom of the pulp and water distribution chamber, and the magnetic medium box series channel is located in the middle of the height direction of the magnetic field chamber and surrounds the axis of the magnetic field chamber;

[0018] The non-cylindrical area of ​​the sorting shell is provided with an opening at the top, that is, the slurry inlet and water inlet of the slurry and water distributor pass through, and the magnetic medium box is moved in or out; a magnetic medium box driving device is provided in the sorting shell, and the magnetic medium box driving device drives the magnetic medium boxes to be put together one by one to form a magnetic medium box string, and move in the magnetic medium box string channel;

[0019] The magnetic medium box is a rectangular box surrounded by two side plates and two end plates and opened on the upper and lower sides. A plurality of middle partitions are vertically arranged inside the rectangular box to divide the rectangular box into a plurality of magnetic medium arrangement chambers. The middle partitions are parallel to the side plates. The magnetic medium arrangement chamber is provided with uniformly distributed magnetic media with a filling rate between 5% and 25%. The magnetic medium box is formed by connecting the end plates of two adjacent magnetic medium boxes together. The direction of the slurry dripping from the outlet hole of the slurry distribution chamber into the magnetic medium box, the length direction of the magnetic medium, and the direction of the magnetic field generated by the superconducting coil are three directions orthogonal to each other.

[0020] The discharge chamber of the separation tank, close to the input side of the magnetic separation zone, is a non-magnetic mineral discharge chamber, and a non-magnetic mineral discharge port is provided at the bottom;

[0021] The discharge chamber of the separation tank, the output side close to the magnetic separation area is the magnetic mineral discharge chamber, and the bottom is provided with a magnetic mineral discharge port;

[0022] The cleaning area comprises a cleaning pool, a conveying device is arranged on the upper part of the cleaning pool, and a recovery hopper is arranged at the bottom of the cleaning pool.

[0023] As a further improvement of the present invention, the magnetic medium box driving device in the magnetic selection area includes a box pushing mechanism and a magnetic medium box string moving guide mechanism;

[0024] The box pushing mechanism is installed at the input end of the sorting pool; the box pushing mechanism includes a pushing cylinder and a pushing block; the pushing cylinder shareholder is outside the shell end plate of the sorting shell, the pushing rod of the pushing cylinder passes through the shell end plate and is located in the sorting shell, and the end of the pushing rod of the pushing cylinder is connected to the pushing block; the pushing block can be driven by the pushing cylinder to move along the length direction of the sorting shell by a distance greater than or equal to the width of the side plate of one magnetic medium box;

[0025] The magnetic medium box string moving guide mechanism includes slide rails located at both ends of the sorting pool; slide rail support plates are provided at both ends of the sorting shell, the slide rail support plates are arranged horizontally, and the middle is a hollow structure, so that the magnetic medium box placement area above the slide rail support plate is connected with the discharge chamber below the slide rail support plate;

[0026] Slide rails are arranged on both sides of the slide rail support plate in the width direction; and both sides of the bottom of the magnetic medium box string are mounted on the slide rails.

[0027] Furthermore, there are more than two pushing cylinders, and all the pushing cylinders push the pushing block synchronously;

[0028] The pushing block is arranged at a height position along the center of gravity of the magnetic medium box, and the pushing block pushes the material along the center of gravity of the magnetic medium box.

[0029] Furthermore, the material of the slide rail is plastic with self-lubricating properties.

[0030] Furthermore, the magnetic medium box string moving guide mechanism includes a suspension guide channel formed by a roller assembly located on both sides of the outer side of the pulp and water distributing chamber of the pulp and water distributing device;

[0031] The slide rail extends inwardly and overlaps with both ends of the suspension guide channel;

[0032] The roller assembly fixes the rollers outside the pulp and water dispensing chamber on both sides through the wheel shaft;

[0033] The upper parts of the side plates on both sides of the magnetic medium box extend upward beyond the end plates and are folded inwards to form hanging ears;

[0034] The hanging ears on both sides of the magnetic medium box cooperate with the rollers of the roller assembly to realize the suspension support of the magnetic medium box.

[0035] Furthermore, the roller and the bearing component inside it are made of plastic.

[0036] Furthermore, the bottom plate of the pulp and water dispensing chamber extends to both sides along the width direction to form a support plate;

[0037] The supporting plate is located below the roller assembly.

[0038] As a further improvement of the present invention, a chamber partition is provided inside the pulp and water distribution chamber to divide the pulp and water distribution chamber into a pulp distribution chamber and a water distribution chamber; the chamber partition is arranged toward the output side of the magnetic separation zone;

[0039] The length of the slurry distribution cavity in the magnetic field cavity is greater than the length of the water distribution cavity in the magnetic field cavity.

[0040] Furthermore, the length ratio of the slurry distribution chamber in the magnetic field chamber to the water distribution chamber in the magnetic field chamber is 2:1.

[0041] As a further improvement of the present invention, a screw conveying mechanism is provided in the non-magnetic mineral discharge chamber of the discharge chamber;

[0042] The driving end of the screw conveying mechanism is located outside the shell end plate of the sorting shell;

[0043] The propeller blades of the screw conveying mechanism run through the entire magnetic field cavity.

[0044] Furthermore, the portion of the propeller blade of the screw conveying mechanism in the installation chamber is divided into two rotation directions, and the ends of the rotating conveying of the propeller blades are respectively provided with non-magnetic mineral discharge ports;

[0045] There are two non-magnetic mineral discharge ports, which are located outside the two ends of the ferromagnetic shield.

[0046] As a further improvement of the present invention, the magnetic mineral discharge chamber of the discharge chamber is located outside the ferromagnetic shield;

[0047] The magnetic mineral discharge chamber is a funnel chamber, the interior of which is provided with a discharge inclined plate, and the bottom of which is a magnetic mineral discharge port.

[0048] As a further improvement of the present invention, the cleaning tank includes a cleaning section and a connecting section;

[0049] The cleaning section is parallel to the sorting tank; two ends of the cleaning section are connected with two ends of the sorting tank through a connecting section.

[0050] As a further improvement of the present invention, the number of magnetic medium boxes stored in the cleaning tank is less than the number of magnetic medium boxes in the magnetic medium box string in the sorting tank;

[0051] The conveying device in the cleaning tank includes a belt conveying device and a roller conveying device;

[0052] The belt conveyor device includes two belts arranged close to the two side walls of the cleaning tank, and the middle of the belts on both sides is a cavity;

[0053] A roller conveyor is provided behind the belt conveyor;

[0054] The front part of the roller conveyor is a driving roller, the rear part is a driven roller, and a stopper is arranged at the end.

[0055] As a further improvement of the present invention, a sprayer is provided above the cleaning pool.

[0056] As a further improvement of the present invention, a transport mechanism is provided between the two ends of the magnetic separation zone and the cleaning zone, and the transport mechanism is provided with a grabbing mechanism, which drives the magnetic medium box to transfer the magnetic medium box along the connecting section of the cleaning tank.

[0057] Further, the grabbing mechanism includes a frame connected to the execution end of the transport mechanism;

[0058] There are slideways on both sides of the lower part of the frame; there are 2 inner support claws;

[0059] The upper part of the inner support claw is installed in the slide groove through a sliding pin, and the inner support claw can be telescopically moved along the slide groove by the sliding pin;

[0060] The bottom of the inner supporting claw extends outward to form a claw hook, and the claw hook cooperates with the hanging ear of the magnetic medium box;

[0061] A grabbing driving element is provided above the frame, and a cylinder of the grabbing driving element is fixed on the frame;

[0062] The piston rod of the grab driving element is connected to the driving head;

[0063] The drive head and the grab drive element are located in the middle;

[0064] The inner sides of the inner supporting claws on both sides are hinged to the driving head through a swing rod.

[0065] The vertical ring-like superconducting high-gradient magnetic separator of the present invention has the following working process in the magnetic separation area: the magnetic medium boxes enter the separation pool from the starting end one by one and fall on the slide rail; the box pushing mechanism is actuated to push the magnetic medium box at the end a distance, thereby leaving a cavity for the next magnetic medium box to enter; after the magnetic medium boxes enter one by one, they are connected one by one with the end plates attached together to form a magnetic medium box string, and gradually move to the bottom of the pulp and water distributor under the push of the box pushing mechanism, and the bottom support of the magnetic medium box by the slide rail is transformed into a suspension support by the roller assembly and the hanging ear; under the push of the box pushing mechanism, the magnetic medium box continues to move forward gradually. The slurry in the slurry distribution chamber of the slurry distributor and water distributor falls into the magnetic medium box along the outlet hole, and the superconducting coil of the superconducting magnetic system works to generate a strong magnetic field, which makes the magnetic medium in the magnetic medium box generate magnetic attraction, so that the magnetic minerals in the slurry passing through the magnetic medium box are adsorbed on the magnetic medium, while the water and non-magnetic minerals in the slurry fall under the gravity, pass through the magnetic medium box and fall into the discharge chamber, and then driven by the propeller blades of the conveying mechanism, the fallen slurry is discharged from the non-magnetic mineral discharge port; the magnetic medium box continues to move forward, and when it moves to the bottom of the water distribution chamber of the slurry distributor and water distributor, the clean water in the water distribution chamber falls into the magnetic medium box along the outlet hole, which affects the inner magnetic medium box. The magnetic medium is cleaned and brushed, especially the magnetic minerals adsorbed on the magnetic medium are flushed with clean water to flush away the impurities on the surface. The water and the non-magnetic minerals flushed away fall by gravity and also pass through the magnetic medium box and fall into the discharge chamber. Driven by the propeller blades of the conveying mechanism, the fallen slurry is discharged from the non-magnetic mineral discharge port; until the magnetic medium box completely leaves the bottom of the slurry distributor and is transferred to the slide rail at the outlet end of the sorting tank; the magnetic medium box continues to move forward until it leaves the magnetic field area, that is, reaches the top of the magnetic mineral discharge chamber, and the magnetic medium is demagnetized. At this time, the magnetic minerals adsorbed on it fall by gravity and fall into the magnetic mineral discharge chamber. The magnetic medium box moves through the separation tank through the weak magnetic zone, the strong magnetic zone and the weak magnetic zone, and the magnetic medium absorbs the magnetic minerals in the slurry, and the unabsorbed substances (water, non-magnetic minerals) are collected by the conveying mechanism and discharged through the non-magnetic mineral discharge port; the magnetic minerals absorbed by the magnetic medium are rinsed with clean water in the water distribution chamber, and finally collected through the magnetic mineral discharge chamber and discharged to the outside, thereby achieving separation.

[0066] After the magnetic medium box is taken out from the sorting pool, it is placed in the cleaning pool for deep cleaning. In particular, after the magnetic medium is away from the magnetic field, the magnetic minerals still adhering to it are fully washed off and the magnetic minerals are collected in a concentrated manner. The cleaned magnetic medium box then re-enters the sorting pool through the starting end of the sorting pool for recycling.

[0067] The vertical ring-type superconducting high gradient magnetic separator of the present invention has the following characteristics:

[0068] 1. The superconducting magnetic system generates a high magnetic field in the cylindrical space (magnetic field cavity) it surrounds. Its characteristics are that the magnetic lines of force are parallel to the axis at the center of the magnetic system, the field strength is high in the middle, gradually decays at both ends of the magnetic system, and decays rapidly outside the magnetic system; the axis of the superconducting magnetic system is parallel to the ground, the slurry and flushing water flow in the magnetic system in a vertical direction, and the magnetic medium and the magnetic field direction, the slurry and flushing water flow direction are orthogonal to each other; different from the vertical ring magnetic separator, the slurry flow direction is perpendicular to the magnetic field direction, and the magnetic medium movement direction is the same as the magnetic field direction, resulting in the magnetic ore particles on the medium wire adsorption point perpendicular to the slurry flow direction, the magnetic field force and the fluid drag force competition results in the magnetic separator has a higher separation rate;

[0069] 2. The magnetic medium box is in the shape of a cuboid, with four steel plates welded together on the sides, a feed port on the top, a discharge port on the bottom, and magnetic medium arranged inside; the magnetic medium box is given priority in the cross section of the cylindrical magnetic field space to maximize the utilization efficiency of the magnetic field;

[0070] 3. A pulp distributor and a water distributor are arranged above the magnetic medium box string, and the two are combined into a sturdy pulp distributor and water distributor to provide a solid base for the rollers on both sides; the pulp inlet and water inlet of the pulp distributor and water distributor are outside the magnetic system and located on the upper surface, and the pulp outlet and water outlet on the lower surface form two areas inside the magnetic system, namely, the pulp distribution area and the water distribution area; the upper surface of the pulp distributor and water distributor is as close as possible to the top of the inner surface of the cylindrical barrel in the middle of the sorting tank to obtain the maximum available internal space, and the lower surface is horizontal so that the discharged pulp and water can vertically enter the magnetic medium box;

[0071] 4. The length of the slurry distribution area is greater than that of the water distribution area. Usually, the former is twice as long as the latter. In order to maximize the magnetic force range of the magnetic medium, the slurry distribution area occupies the main strong magnetic field area. Once the magnetic mineral particles are adsorbed by the magnetic medium, they are not easily stripped even under a lower magnetic field. Therefore, the water distribution area extends from the strong magnetic field area to the edge of the magnetic system (such as the 2 Tesla magnetic surface).

[0072] 5. Visually observe the end face of the magnetic system, and set a number of rollers on both sides of the slurry distributor and water distributor, which are in contact with the 90-degree bends on the two side panels of the magnetic medium box, and serve as suspension supports for the movement of the magnetic medium box in the magnetic system;

[0073] 6. After leaving the roller area of ​​the slurry distributor outside the magnetic system, the two sides of the bottom of the magnetic medium box are supported on plastic slide rails, and the slide rails are fixed on the slide rail support plates; the slide rail support plates are horizontally welded in the cylinder of the sorting tank, and most of them are hollowed out to minimize the obstruction to the discharge port of the magnetic medium box;

[0074] 7. The main body of the sorting tank is a cylinder with closed end faces, and its outer diameter is slightly smaller than the inner diameter of the magnetic system hole (magnetic field cavity), so as to maximize its internal space under the premise of easy installation; both ends of the sorting tank extend out of the magnetic system and extend to the weak magnetic field area; the sorting tank is a complete cylinder in the magnetic system to have a stable mechanical structure, and the slurry distributor is located at the top of the cylinder; the upper opening outside the magnetic system allows the slurry inlet and water inlet of the slurry distributor to be connected to the external pipeline, and also provides space for taking out and putting in the magnetic medium box;

[0075] 8. In the sorting pool, the magnetic medium boxes are placed close to each other along the axis of the magnetic system to form a magnetic medium box string; at one end of the sorting pool, a box pushing mechanism is used to realize the movement of the magnetic medium box string, and the continuous movement of the magnetic medium box string is realized by taking out the end magnetic medium box at the other side and retracting the box pushing mechanism on the same side before inserting a new magnetic medium box; in the vertical direction, the box pushing mechanism acts on the center of gravity of the magnetic medium box to avoid generating additional rotational torque;

[0076] 9. The bottom of the sorting pool is divided into two areas; Area 1 (non-magnetic mineral discharge chamber) includes the entire length of the magnetic system and the part outside the magnetic system where the box pushing mechanism is located, and a discharge port is set on the outside of both ends of the magnetic system for discharging the slurry mainly composed of non-magnetic minerals after magnetic separation; Area 1 is also installed with a spiral feeding mechanism, in which the two spirals start from the center plane of the magnetic system, and the spiral pieces on both sides are symmetrical with this plane, so that when the axis of the spiral feeding mechanism rotates in one direction, the slurry, especially the solid material in the slurry, is transported from the center of the magnetic system to both sides to the slurry discharge port; setting two discharge ports and symmetrical discharge can shorten the spiral conveying distance on one side and improve Discharge efficiency (i.e., discharge volume per unit time); for the part outside the magnetic system in area one, a spiral sheet is also set to transport materials to the discharge port on the same side to prevent the accumulation of materials in this section during long-term operation; Area two (magnetic mineral discharge chamber) corresponds to the area where the magnetic medium box is taken out from the sorting pool. Since the area is small, a gravity slope is set to assist the material to be discharged from the discharge port; the reason for setting the discharge port in area two is that this is a weak magnetic field area, and during the removal process, the magnetic medium box continuously enters a lower magnetic field intensity area, and the adsorbed magnetic mineral particles cannot be reliably maintained on the magnetic medium. The detached magnetic mineral particles are discharged from the discharge port of area two to avoid contaminating the discharge of area one.

[0077] 10. A horizontal conveying device is arranged outside the magnetic system and near the magnetic system in parallel with the separation tank; the conveying device is composed of three parts; the longer section is a double-belt conveying device, the narrower belt supports the two side plates of the magnetic medium box, and the middle area of ​​the two belts ensures that the residual materials in the magnetic medium box continue to be discharged during the conveying process; connected to the belt conveying device is an active roller conveying device composed of active rollers, that is, the rollers are connected by a toothed chain and then driven by a motor to actively rotate; connected to the active roller conveying device is a driven roller conveying device, which is composed of driven rollers, and the driven rollers rotate freely without any drive; a number of spray devices are arranged above the active roller conveying device to completely remove the residual magnetic mineral particles in the magnetic medium box;

[0078] 11. The complete magnetic medium box flow process is described as follows: at one end of the magnetic system in the sorting pool, the magnetic medium box string is pushed forward by a distance not less than one magnetic medium box, and at the other end of the magnetic system, the transport mechanism grabs the magnetic medium box at the end from the sorting pool, and the magnetic medium box is placed at one end of the double belt conveyor device while keeping its own orientation unchanged (i.e., without any rotation in any degree of freedom), and then transported to the spraying area at a faster speed; in the spraying area, several magnetic medium boxes move forward at a slower speed to ensure the cleaning effect; the magnetic medium boxes in front enter the driven roller conveyor in turn. The frontmost magnetic medium box is stopped by the baffle and stays on the driven roller conveyor; at this time, the box pushing mechanism has retracted to the initial position, leaving a space for a magnetic medium box at the feeding end of the sorting tank; the transport mechanism grabs the frontmost magnetic medium box on the driven roller conveyor and puts it into the space at the feeding end of the sorting tank, that is, in the cavity in front of the box pushing mechanism; the box pushing mechanism pushes the magnetic medium box string forward by a distance not less than one magnetic medium box, especially to make the newly added magnetic medium box stick to the previous magnetic medium box and move forward together by a distance of one magnetic medium box; this cycle is repeated;

[0079] In the actual operation of the equipment, the transport mechanisms at both ends of the magnetic system perform pick-up and placement actions simultaneously to shorten the waiting time for the movement of the magnetic medium box string; in order to simplify the structure of the magnetic medium box, the grabbing mechanism in the transport mechanism still uses the 90° bends (hanging ears) on the two side plates of the magnetic medium box as the load-bearing contact surface;

[0080] 12. A cleaning tank is set below the conveying path of the magnetic medium box outside the sorting tank to collect the magnetic minerals after magnetic separation; the cleaning tank designed according to the shortest path is in a right-angled U shape when viewed from a top view; a recovery hopper and a recovery outlet are set below the spray area at the bottom, and a gravity slope is set at the rest of the bottom, so that the recovery outlet is the lowest point in the vertical direction to avoid the retention and accumulation of solid materials in the cleaning tank.

[0081] The second aspect of the present invention provides a method for using a vertical ring-type superconducting high gradient magnetic separator:

[0082] The magnetic medium boxes are sequentially connected together to form a magnetic medium box string, which circulates through the magnetic field cavity formed by the superconducting coil;

[0083] A slurry distributor is provided above the magnetic field cavity to drip the slurry into the magnetic medium box;

[0084] The magnetic medium box is equipped with magnetic medium, which has magnetism in the magnetic field cavity, and absorbs the magnetic minerals in the dripping slurry, while the other slurry falls into the non-magnetic mineral discharge cavity below for discharge;

[0085] The magnetic medium box takes the magnetic mineral out of the magnetic field cavity, the magnetic medium is demagnetized, and the magnetic mineral falls off and falls into the magnetic mineral discharge cavity below for discharge;

[0086] The magnetic medium box leaves the magnetic field area and moves to the cleaning area, where the inside of the magnetic medium box is flushed to completely remove the magnetic minerals for further collection;

[0087] After being cleaned, the magnetic medium box is transported back to the entrance of the magnetic field cavity for recycling.

[0088] The vertical ring-like superconducting high gradient magnetic separator and the use method thereof of the present invention have the following advantages:

[0089] 1. Compared with the vertical ring magnetic separator, the superconducting magnetic system can easily achieve higher, larger and longer three key magnetic separation process parameters, namely, field strength, magnetic field space and filtration depth (the length of the magnetic medium area along the slurry flow direction); the present invention provides a higher magnetic separation capability, thereby breaking through the lower limit of magnetic separation of fine-grained weak magnetic minerals by the vertical ring magnetic separator, and has the potential to obtain higher quality products in the two application directions of extracting magnetic concentrates and removing impurities and purifying non-metallic ores;

[0090] 2. Using the material transfer method of modern industrial production lines, the waiting time for the movement of the magnetic medium box string in the sorting pool can be controlled within 2 seconds, and the longer filtration depth ensures that the 2-second waiting time will not reduce the quality of non-magnetic and magnetic discharges; the feeding and discharging of the magnetic separator are continuous; the moving speed of the magnetic medium box string and the rotation speed of the vertical ring have similar adjustment capabilities for the mineral processing capacity;

[0091] 3. Since superconducting conductors have almost no resistance, superconducting coils consume almost no electrical energy; the power consumed by the related auxiliary equipment that provides cooling for the superconducting coils is generally below 15-20kW, which is much less than the power consumption of the vertical ring magnetic system;

[0092] 4. The axial magnetic force of the superconducting magnetic system on each magnetic medium box is supported by the adjacent magnetic medium boxes, with a large contact surface and a small deformation. The axial magnetic field force of the magnetic medium box string is almost zero, which has little effect on the thrust of the push block. Therefore, the moving speed of the magnetic medium box string does not need to consider the influence of the magnetic field force.

[0093] 5. Similar to the vertical ring magnetic separator, the liquid level in the separation tank inside the magnetic system can be adjusted by setting a valve at the discharge port, thereby allowing the control of another key process parameter of magnetic separation, "the ore pulp flow rate in the magnetic medium area";

[0094] 6. There are no moving parts between the magnetic medium box and the magnetic medium box, which reduces the probability of metal particles and micro-chips outside the magnetic medium area;

[0095] 7. The slide rails of the magnetic medium box in the sorting tank are made of self-lubricating plastic. During the long-term operation of the equipment, even if micro-chips are generated, they are easily removed in subsequent processing because their density is much lighter than water. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] Figure 1 It is a schematic diagram of the overall structure of the vertical ring-type superconducting high gradient magnetic separator of the present invention;

[0097] Figure 2 It is a top view of the overall structure of the vertical ring-type superconducting high gradient magnetic separator of the present invention;

[0098] Figure 3 It is an overall cross-sectional view of the internal structure of the magnetic separation zone of the present invention;

[0099] Figure 4 It is an overall front view of the pulp and water distributor of the present invention;

[0100] Figure 5 It is an overall cross-sectional view of the internal structure of the pulp and water distributor of the present invention;

[0101] Figure 6 It is a side view of the pulp and water distributor of the present invention;

[0102] Figure 7 It is a schematic diagram of the structure of the roller assembly on the pulp and water distributor;

[0103] Figure 8 It is a schematic diagram of the structure of the pulp and water outlet holes in the pulp and water distributor;

[0104] Fig. 9 It is a schematic diagram of the overall structure of the sorting pool of the present invention;

[0105] Fig.10 It is a cross-sectional view of the slide rail in the sorting tank;

[0106] Fig.11 It is an overall top view of the sorting pool of the present invention;

[0107] Fig.12 It is an overall cross-sectional view of the internal structure of the sorting tank of the present invention;

[0108] Fig.13 It is a schematic diagram of the overall structure of the magnetic medium box of the present invention;

[0109] Fig.14 It is a front view of the overall structure of the magnetic medium box of the present invention;

[0110] Fig.15 for Fig.14 A partial enlarged schematic diagram is used to show the top ear structure of the magnetic medium box;

[0111] Fig.16 It is a schematic diagram of the magnetic medium box of the present invention in the magnetic selection area;

[0112] Fig.17 for Fig.16 A partial enlargement of Figure 1 , used to show the combined state of the hanging ear and the roller assembly of the magnetic medium box;

[0113] Fig.18 for Fig.16 A partial enlargement of Figure 2 , used to show the combination status of the base and the slide rail of the magnetic medium box;

[0114] Fig.19 It is an overall top view of the box pushing mechanism of the present invention;

[0115] Fig. 20 It is a schematic diagram of the arrangement of the material pushing block and the magnetic medium box of the box pushing mechanism of the present invention;

[0116] Fig.21 It is a schematic diagram of the arrangement of the cleaning pool of the present invention;

[0117] Fig. 22 It is a front view of the connecting section of the cleaning tank of the present invention;

[0118] Fig.23 It is a schematic diagram of the structure of the conveying device of the cleaning pool of the present invention;

[0119] Fig.24 It is a front view of the cleaning section of the cleaning tank of the present invention;

[0120] Fig.25 The structure of the grabbing mechanism of the magnetic medium box of the present invention is shown in FIG. Figure 1 ;

[0121] Fig.26 The structure of the grabbing mechanism of the magnetic medium box of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0122] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0123] like Figure 1 , Figure 2 As shown, it is a schematic diagram of the overall structure of the vertical ring-type superconducting high gradient magnetic separator of the present invention; one side is the magnetic separation area, and the other side is the cleaning area, and the magnetic medium box 9 is transferred between the two areas to form a cycle.

[0124] Among them, the magnetic separation area mainly includes a superconducting magnetic system 1, a slurry and water distributor 2, a separation pool 3, and a box pushing mechanism 8; a cavity is provided in the superconducting magnetic system 1, the slurry and water distributor 2 is installed on the upper part, and the separation pool 3 is installed on the lower part; a conveying channel for the magnetic medium box 9 is formed between the slurry and water distributor 2 and the separation pool 3; the magnetic medium boxes 9 are arranged together one by one, and are pushed and transferred by the box pushing mechanism 8 at the end, and gradually move from area A through the magnetic separation area to area B.

[0125] Among them, the cleaning area mainly includes a cleaning pool 4; a belt conveyor 5 and a roller conveyor 6 are provided on the inner upper part of the cleaning pool 4 to transport the magnetic medium box 9 on the cleaning pool 4 and transport it from area C to area D; a sprayer 7 is also provided on the top to spray and clean the passing magnetic medium box 9.

[0126] Between the end (area B) of the sorting pool 3 and the starting end (area C) of the cleaning pool 4, as well as between the end (area D) of the cleaning pool 4 and the starting end (area A) of the sorting pool 3, there are respectively provided transport mechanisms (not shown in the figure), such as a robotic arm, a cross coordinate robot, etc., to transfer the magnetic medium box 9 between the magnetic separation area and the cleaning area, so as to realize cyclic and continuous sorting operations.

[0127] The internal structure of the magnetic separation area is as follows Figure 3As shown, in the middle is a superconducting magnetic system 1, in the middle of which is a superconducting coil 11, a strong magnetic field is generated inside the superconducting coil 11, and a magnetic field cavity 12 is formed; on the outside of the superconducting coil 11, a ferromagnetic shield 13 is provided, and the internal space of the ferromagnetic shield 13 is relatively large, which can completely contain the superconducting coil 11 and its related accessories; the magnetic field cavity 12 also extends to both ends, penetrating the side plates at both ends of the ferromagnetic shield 13, forming an installation chamber, in which a slurry distributor 2 and a separation tank 3 are respectively installed. The length of the slurry distributor 2 is slightly longer than that of the ferromagnetic shield 13, and the slurry distributor 2 is located at the upper part of the installation chamber; in the middle of the slurry distributor 2 is a slurry distributor cavity 21, which is basically located in the installation chamber; the two ends of the slurry distributor cavity 21 extend outward, and are respectively provided with a slurry inlet 22 and a water inlet 23; the slurry inlet 22 and the water inlet 23 are both located outside the two ends of the ferromagnetic shield 13. A sorting pool 3 is provided below the slurry distributor 2; the sorting pool 3 includes a sorting shell 31, the interior of the sorting shell 31 is a cavity for storing the magnetic medium box 9; the length of the sorting pool 3 is longer than the length of the slurry distributor 2, and both ends of the sorting pool 3 exceed the two ends of the slurry distributor 2, and openings are provided above the exceeding parts, respectively forming the taking and placing operation space of the magnetic medium box 9, namely area A and area B; a box pushing mechanism 8 is provided on the feeding side of the sorting pool 3, namely area A; and a discharge chamber is provided at the lower part of the sorting pool 3.

[0128] like Figure 4 As shown, a roller assembly 24 is provided on the outer side of the pulp and water distributing chamber 21 of the pulp and water distributing device 2; Figure 6 As shown, the roller assembly 24 is symmetrically arranged on both sides of the outer side of the pulp and water chamber 21; Figure 7 As shown, the roller assembly 24 fixes the roller 242 on both sides of the pulp and water dispensing cavity 21 through the wheel shaft 241; a plurality of groups of the roller assemblies 24 are preferably evenly spaced and horizontally distributed to form a guide channel. The roller 242 and the bearing components inside it are preferably made of plastic or ceramic to avoid the generation of metal chips and mixing into the ore pulp.

[0129] like Figure 3 , Figure 5 As shown, a chamber partition 211 is provided inside the pulp and water distributing chamber 21, dividing the pulp and water distributing chamber 21 into two relatively independent chambers, the pulp distributing chamber 212 connected to the pulp inlet 22, and the water distributing chamber 213 connected to the water inlet 23. A plurality of outlet holes 214 are provided at the bottom of the pulp distributing chamber 212 and the water distributing chamber 213; Figure 8 The upper part of the outlet hole 214 is a bell mouth 2141, and the lower part of the outlet hole 214 is a vertical hole 2142; the slurry in the slurry distribution chamber 212 and the water in the water distribution chamber 213 are gathered through the bell mouth 2141, and then flow out and drip through the vertical hole 2142, and fall vertically into the magnetic medium box 9 below.

[0130] Furthermore, the chamber partition 211 is disposed at a position biased toward region B, that is, the length of the slurry distribution chamber 212 in the magnetic field chamber 12 is greater than the length of the water distribution chamber 213 in the magnetic field chamber 12, and the length ratio of the two is approximately 2:1; according to the magnetic field generated by the superconducting coil 11, the middle portion thereof is the region with the strongest magnetic field, so the slurry distribution chamber 212 occupies the main strong magnetic field region, within which the slurry drips into the magnetic medium box 9, which enables the magnetic mineral particles in the slurry to be better adsorbed by the magnetic medium in the magnetic medium box 9, thereby improving the utilization rate of the separation magnetic field generated by the superconducting coil 11.

[0131] Furthermore, the bottom plate of the pulp and water distributing chamber 21 extends to both sides along the width direction to form a support plate 25, and the support plate 25 is located below the roller assembly 24; in this way, the support plate 25 can prevent the slurry below from splashing to the roller assembly 24 area, avoid the formation of jams on the roller assembly 24, and cause the roller 242 to be unable to rotate smoothly, and the rolling friction between the magnetic medium box 9 is converted into sliding friction, thereby increasing the friction force.

[0132] The overall structure of the sorting pool 3 is as follows Fig. 9 , Fig.11 , Fig.12As shown, the main body of the sorting shell 31 of the sorting pool 3 is a cylindrical shell 311, and the outer diameter of the cylindrical shell 311 matches the inner diameter of the superconducting coil 11 (the outer diameter of the magnetic field cavity 12); shell end plates 312 are provided at both ends of the cylindrical shell 311, and a box pushing mechanism 8 is fixed on the shell end plate 312 on the feeding side; the cylinder body of the pushing cylinder 81 of the box pushing mechanism 8 is solid on the outside of the shell end plate 312, and the pushing rod of the pushing cylinder 81 passes through the shell end plate 312 and enters the inside of the sorting shell 31, and the end of the pushing rod of the pushing cylinder 81 is connected to a pushing block 82; the pushing block 82 is located in the A area, and can be driven by the pushing cylinder 81 to reciprocate along the length direction of the sorting shell 31. The pushing cylinder 81 can be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. Openings are provided at the upper parts of both ends of the cylindrical shell 311 to form inlets and outlets 313, which are used to place the magnetic medium box 9 into the sorting tank 3 in area A and to take the magnetic medium box 9 out of the sorting tank 3 in area B. Support baffles 314 are provided at both ends of the cylindrical shell 311, and the support baffles 314 at both ends indirectly divide the interior of the cylindrical shell 311 into areas (area A and area B) at both ends for taking and placing the magnetic medium box 9, and an in-field sorting area in the middle. By using the support baffle 314 and the shell end plate 312, horizontal slide rail support plates 315 are respectively provided at the middle and lower parts of the height of the two ends of the cylindrical shell 311. The middle of the slide rail support plate 315 is a hollow structure, which facilitates the medium to flow downward from the top of the slide rail support plate 315 through the slide rail support plate 315 to the discharge chamber below; slide rails 32 are provided on both sides of the width direction of the slide rail support plate 315; the slide rails 32 and the slide rail support plate 315 extend inward until they meet the roller of the pulp and water dispensing chamber 21. The two ends of the guide channel formed by the component 24 overlap, and the slide rail 32 is aligned and supported from the bottom of the magnetic medium box 9, while the guide channel formed by the roller component 24 suspends and supports the magnetic medium box 9 from the top. That is, in the process of the magnetic medium box 9 moving from area A to area B, it is first supported from the bottom by the slide rail 32 in area A, and then transferred to the in-field sorting area and suspended from the top by the guide channel formed by the roller component 24, and finally transferred to area B and supported from the bottom by the slide rail 32.

[0133] like Fig.10 As shown, the slide rail 32 has a narrow supporting sliding surface 321, which is used to support the magnetic medium box 9 from both sides of the bottom thereof, that is, it provides support and reduces the supporting area to reduce friction; above the supporting sliding surface 321 is an entry guide slope 322, which provides guidance for the magnetic medium box 9 when entering the slide rail 32; below the supporting sliding surface 321 is a leakage guide slope 323, which guides the leakage of the magnetic medium box 9 on both sides to converge inward and enter the discharge chamber below.

[0134] The material of the slide rail 32 is preferably a self-lubricating plastic (such as polytetrafluoroethylene) or ceramic. The friction coefficient of the self-lubricating material is small, which can reduce the moving thrust of the magnetic medium box 9 group; and non-metallic materials are used, so that when used for sorting magnetic minerals, the micro-chips generated by the friction between the slide rail 32 and the magnetic medium box 9 will not generate magnetism and will not be mixed into the magnetic mineral particles. The material of the slide rail 32 is preferably selected from a material with a density lower than that of water (density ρ<1g / cm 3 ) wear-resistant self-lubricating material, the resulting micro-chips will float on the water surface and can be easily removed in subsequent processing.

[0135] Below the sorting shell 31 is a discharge chamber, wherein the discharge chamber near the feed side is a non-magnetic mineral discharge chamber, in which a screw conveying mechanism 35 is preferably installed; the non-magnetic mineral discharge port 36 of the screw conveying mechanism 35 is located at the bottom of the sorting tank 3 and outside the two ends of the ferromagnetic shield 13. The lower part of the sorting tank 3, near the discharge side, especially the discharge chamber below the B area, is a magnetic mineral discharge port 38; the magnetic mineral discharge chamber where the magnetic mineral discharge port 38 is located and the non-magnetic mineral discharge chamber where the non-magnetic mineral discharge port 36 is located are separated by a discharge chamber partition 37.

[0136] The driving end 351 of the spiral conveying mechanism 35 is located outside the shell end plate 312 of the sorting shell 31. The driving end 351 can be directly connected to the reduction motor for direct drive, or it can be a pulley / sprocket as shown in the figure, and then connected to the driving source through a belt (V-belt, synchronous belt) or chain for rotational drive.

[0137] The main body of the spiral conveying mechanism 35 is a screw blade, which extends from the shell end plate 312 in area A to the inner side of area B and is supported by the discharge chamber partition 37; the spiral conveying mechanism 35 runs through the entire magnetic field cavity 12, that is, from the non-magnetic area of ​​area A, through the weak magnetic area, into the strong magnetic area where the magnetic field cavity 12 is located, and then leaves the magnetic field cavity 12 to reach the weak magnetic area, approaching area B. The non-magnetic mineral discharge chamber where the screw conveying mechanism 35 is located mainly receives the discharge of non-magnetic mineral slurry. Since this area is relatively long, two non-magnetic mineral discharge ports 36 are preferably provided, which are respectively located on the outside of the two ends of the ferromagnetic shield 13; accordingly, the screw blades of the screw conveying mechanism 35 are divided into two rotation directions on the inner side of the ferromagnetic shield 13, namely screw blade II 353 and screw blade III 354, which convey the slurry to the outside of the two ends and discharge it through the non-magnetic mineral discharge ports 36 at the two ends; further, when the non-magnetic mineral discharge port 36 on the A area side is close to the end face of the ferromagnetic shield 13, the screw blade below the A area is screw blade I 352, which conveys the slurry from the end to the inside and discharges it through the adjacent non-magnetic mineral discharge port 36; the rotation direction of screw blade I 352 is the same as that of screw blade III 354, and the rotation direction of screw blade I 352 is opposite to that of screw blade II 353. By adopting the blade design with different rotation directions, the slurry in the non-magnetic mineral discharge cavity can be quickly discharged from the two non-magnetic mineral discharge ports 36, thereby improving the discharge efficiency and avoiding slurry accumulation.

[0138] Since the magnetic mineral discharge chamber is relatively short, a funnel structure is directly adopted, that is, a discharge inclined plate 381 is provided to gather the magnetic minerals and then discharge them through the magnetic mineral discharge port 38 .

[0139] The specific structure of the magnetic medium box 9 is as follows: Fig.13 , Fig.14 As shown, it is a rectangular box which is open on the top and bottom and is formed by welding two side plates 91 and two end plates 92. A plurality of middle partitions 93 are vertically arranged inside the rectangular box to divide the rectangular box into a plurality of magnetic medium arrangement cavities 94; the middle partitions 93 are parallel to the side plates 91; the magnetic medium arrangement cavities 94 are filled with uniformly distributed magnetic media with a filling rate between 5% and 25%.

[0140] The upper parts of the side panels 91 on both sides extend upward beyond the end panels 92 and fold inward to form hanging ears 95. Fig.15As shown, the ear 95 is used to cooperate with the roller 242 of the roller assembly 24 to achieve suspension support for the magnetic medium box 9. When the axle 241 of the roller assembly 24 exceeds the outer side of the roller 242, in order to avoid the end of the axle 241 from contacting the inner side of the side plate 91, or the outer surface of the roller 242 from contacting the inner side of the side plate 91, thereby generating a large friction force, a boss 951 is formed at the contact portion between the ear 95 and the side plate 91, thereby forming a suspension plane 952 in contact with the wheel surface of the roller 242 on the inner side of the ear 95, and forming a clearance space at the connection portion between the ear 95 and the side plate 91; and by providing the boss 951, the connection strength between the ear 95 and the side plate 91 can be improved, thereby increasing the reliability of the suspension support. For details, please refer to Fig.16 , Fig.17 .

[0141] The lower part of the side plates 91 on both sides may also extend downward, beyond the end plates 91, to form a bottom bracket 96; Fig.16 , Fig.18 The bottom bracket 96 is just seated on the supporting sliding surface 321 of the slide rail 32, reducing the contact area, and the length direction of the bottom bracket 96 is parallel to the length direction of the slide rail 32, which is conducive to sliding guidance, thereby realizing both bottom bracket support and sliding movement.

[0142] like Fig.16 As shown, by rationally designing the height of the magnetic medium box 9, especially the height of the side panels 91 on both sides, to adapt to the guide channel formed by the roller assemblies 24 on both sides of the slurry and water distributor 2, and the slide rails 32 at both ends of the sorting pool 3, reliable, stable and continuous transfer movement of the magnetic medium box 9 in the magnetic separation area is achieved.

[0143] Furthermore, the end plates 92 of the magnetic medium boxes 9 are flat plates, and the end plates 92 of two adjacent magnetic medium boxes 9 in the magnetic selection area are placed together and in front contact, thereby increasing the contact area.

[0144] The movement of the magnetic medium box 9 in the magnetic selection area is pushed by the box pushing mechanism 8 at the starting end (area A). In order to achieve linear motion, the driving mechanism generally adopts a pushing cylinder 81. The piston rod size of the pushing cylinder 81 is relatively small. However, in order to improve the pushing stability of the box pushing mechanism 8, the pushing block 82 needs to be set larger to increase the contact area with the end plate 92 of the magnetic medium box 9; Fig.19 As shown, two or more pushing cylinders 81 can be provided to synchronously push the pushing block 82, thereby improving the pushing stability and also improving the pushing force; further, as Fig. 20 As shown, the pushing block 82 is arranged along the height position where the center of gravity of the magnetic medium box 9 is located, so that the material is pushed along the center of gravity of the magnetic medium box 9, further improving the pushing stability.

[0145] The vertical ring-like superconducting high gradient magnetic separator of the present invention has the following working process in the magnetic separation area: the magnetic medium boxes 9 enter the separation pool 3 from the starting end (area A) one by one and fall on the slide rail 32; the box pushing mechanism 8 is actuated to push the magnetic medium box 9 at the end by one end distance, thereby leaving a cavity for the next magnetic medium box 9 to enter; after the magnetic medium boxes 9 enter one by one, they are connected one by one to form a magnetic medium box string, and gradually move to the bottom of the pulp and water distributor 2 under the push of the box pushing mechanism 8, and the bottom support of the magnetic medium box 9 by the slide rail 32 is converted into a cavity supported by the roller assembly 24 and the hanging ear 95. Docking suspension support (the distance between two adjacent rollers 242 is less than the length of the hanging ear 95, and there is only a discharge chamber under the slurry and water distributor 2 without any partition to avoid material accumulation); under the push of the box pushing mechanism 8, the magnetic medium box 9 continues to move forward gradually, at this time, the slurry is injected into the slurry distribution chamber 212 of the slurry and water distributor 2, and falls into the magnetic medium box 9 along the outlet hole 214, and at this time, the superconducting coil 11 of the superconducting magnetic system 1 works to generate a strong magnetic field (the magnetic field strength is between 2 and 6 Tesla, and the direction is distributed along the axial direction of the superconducting coil 11, that is, parallel to the movement direction of the magnetic medium box 9.The magnetic medium in the magnetic medium box 9 generates magnetic attraction, so that the magnetic minerals in the slurry passing through the magnetic medium box 9 are adsorbed on the magnetic medium, while the water and non-magnetic minerals in the slurry fall due to gravity, pass through the magnetic medium box 9 and fall into the discharge chamber, and then driven by the propeller blades of the conveying mechanism 35, the fallen slurry is discharged outward from the non-magnetic mineral discharge port 36; the magnetic medium box 9 continues to move forward, and when it moves to the bottom of the water distribution chamber 213 of the slurry and water distributor 2, the water distribution chamber 213 is filled with clean water, The slurry also falls into the magnetic medium box 9 along the outlet hole 214, and the inside of the magnetic medium box 9 is cleaned, especially the magnetic minerals adsorbed on the magnetic medium are flushed with clean water, and the impurities on the surface are flushed away. The water and the non-magnetic minerals flushed away fall under gravity, and also pass through the magnetic medium box 9 and fall into the discharge chamber. Driven by the propeller blades of the conveying mechanism 35, the fallen slurry is discharged from the non-magnetic mineral discharge port 36; until the magnetic medium box 9 completely leaves the bottom of the slurry distributor 2, and then transferred to the sorting The magnetic medium box 9 continues to move forward until it leaves the magnetic field area, that is, reaches the top of the magnetic mineral discharge port 38, and the magnetic medium is demagnetized. At this time, the magnetic mineral adsorbed on it falls by gravity and falls into the chamber surrounded by the discharge inclined plate 381, and is finally discharged and collected through the magnetic mineral discharge port 38; the magnetic medium box 9 finally reaches the end of the discharge end (area B), and the magnetic medium box 9 is taken out of the sorting pool 3 by the transport mechanism to make room for the later A magnetic medium box 9 is pushed into the area; the magnetic medium box 9 reaches the B area from the A area. During the process, the magnetic medium box 9 passes through the weak magnetic area-strong magnetic area-weak magnetic area, and the magnetic medium adsorbs the magnetic minerals in the slurry. The unadsorbed substances (water, non-magnetic minerals) are collected by the conveying mechanism 35 and discharged outward through the non-magnetic mineral discharge port 36, while the adsorbed magnetic minerals are rinsed with clean water in the water distribution chamber 213, and finally collected and discharged outward through the magnetic mineral discharge port 38; thereby achieving sorting.

[0146] Since the slurry cavity 212 is relatively long, the magnetic field in the magnetic field cavity 12 of the superconducting coil 11 is relatively strong, and the magnetic medium box 9 located therein has the ability to adsorb magnetic minerals. Therefore, it is preferred that Figure 5 As shown, the outlet hole 214 is opened at the bottom of the slurry distribution cavity 212 located in the magnetic field cavity 12 of the superconducting coil 11, so that the slurry will drip into the magnetic medium box 9 when the magnetic medium box 9 enters the magnetic field cavity 12 and a strong magnetic attraction is generated therein, so that the magnetic minerals in the slurry can be adsorbed and captured by the magnetic medium in the magnetic medium box 9, so that all the slurry from the slurry distribution cavity 212 is adsorbed by the magnetic medium before being discharged from the bottom of the sorting pool 3.

[0147] After the magnetic medium box 9 is taken out of the sorting pool 3, it needs to be further cleaned, so a cleaning pool 4 is provided on the side of the sorting pool 3 to deeply clean the magnetic medium box 9, and then re-enter the sorting pool 3 through the starting end (A area) of the sorting pool 3 for recycling.

[0148] Theoretically, the area A above the propeller blade I352 receives the cleaned magnetic medium box 9, and nothing will fall, and there is no need to collect and transport things outward; but since the lower part of the sorting pool 3 is entirely connected, during the long-term operation of the equipment, mineral particles in the slurry may enter the area below area A and accumulate in this area, or the cleaned magnetic medium box 9 is not fully dried and there are still water droplets when entering, so it is still necessary to set a spiral conveying mechanism 35, that is, propeller blade I352, below area A for discharge; of course, this area (the non-magnetic mineral discharge chamber below area A) can also be provided with a discharge inclined plate as a whole (inclined inward and downward from the end, connected with the non-magnetic mineral discharge port 36) to replace the propeller blade I352 to achieve discharge.

[0149] like Figure 1 , Figure 2 ,and Fig.21 As shown, since the magnetic separation area is provided with a superconducting magnetic system 1, the outside of which is a large ferromagnetic shield 13, the cleaning pool 4 needs to be set at a distance from the sorting pool 3; the cleaning pool 4 includes not only a cleaning section 41 parallel to the sorting pool 3, but also a connecting section 42 located on both sides and connected to the sorting pool 3; Fig. 22 As shown, the bottom of the connecting section 42 is inclined from the sorting tank 3 to the cleaning tank 4, so that water and other substances dripping during the transfer process can flow from the connecting section 42 to the cleaning section 41 along the inclined surface due to gravity, and finally be collected and processed.

[0150] The starting end of the cleaning section 41 is area C, which is used to receive the magnetic medium box 9 removed from area B in the sorting pool 3; the end of the cleaning section 41 is area D, which is used to store the magnetic medium box 9 and supply the magnetic medium box 9 to area A of the sorting pool 3. A conveying device is provided in the cleaning section 41 to convey the magnetic medium box 9, and a sprayer 7 is provided above the conveying device to spray and clean the inside of the magnetic medium box 9 during the conveying process. The length of the cleaning section 41 is equivalent to the length of the sorting pool 3, but the number of magnetic medium boxes 9 stored therein is much less than the number of magnetic medium boxes 9 in the magnetic medium box string in the sorting pool 3, thereby improving the utilization rate of the magnetic medium box 9.

[0151] In order to match the conveying speed of the magnetic medium box 9 in the cleaning section 41 with the moving speed of the magnetic medium box string in the sorting pool 3, it is necessary to make the magnetic medium box 9 move quickly in the cleaning section 41 first, and then decelerate and perform deep cleaning at the end, that is, Fig.23As shown, the conveying device includes a belt conveying device 5 and a roller conveying device 6; the belt conveying device 5 includes two belts arranged close to the walls of the cleaning section 41 on both sides, with a cavity in the middle. The magnetic medium box 9 falls on the belt conveying device 5 for transmission. At this time, due to being away from the magnetic field, the magnetic medium will be further demagnetized, and the magnetic minerals adhering to it will fall and fall into the recovery hopper 43 at the bottom of the cleaning section 41 through the cavity in the middle of the belt conveying device 5 (as shown in FIG. Fig.24 As shown). A roller conveyor 6 is provided behind the belt conveyor 5, wherein the front half is provided as an active roller 61, and the rear half is provided as a driven roller 62. The active roller 61 receives the magnetic medium box 9 from the belt conveyor 5, and then the magnetic medium box 9 is decelerated by the conveyance of multiple active rollers 61, so that the magnetic medium box 9 is close together. At this time, a sprayer 7 is provided above to spray cleaning water to deeply clean the inner cavity of the magnetic medium box 9; finally, the magnetic medium box 9 is pushed closely onto the driven roller 62, moves to the D area, and is blocked by the block 63, and the cleaned magnetic medium box 9 is grabbed by the transport mechanism and then put back into the A area in the sorting tank 3.

[0152] A recovery outlet 44 is provided at the lowest point of the recovery hopper 43 at the bottom of the cleaning section 41 for centralized recovery and treatment of substances generated by the cleaning section 41 .

[0153] like Fig.25 , Fig.26 As shown, in order to grasp the magnetic medium box 9 by the conveying mechanism, the present application further discloses a grasping mechanism, which is provided with a frame 101 for connecting with a robot arm, etc.; a slide groove 102 is provided at the lower part of the frame 101; the upper part of the inner support claw 103 is installed in the slide groove 102 through a sliding pin 104, and the inner support claw 103 can be telescopically moved along the slide groove 102 by the sliding pin 104; the bottom of the inner support claw 103 extends outward to form a claw hook 105, and the claw hook 105 cooperates with the hanging ear 95 of the magnetic medium box 9. A rocker arm 106 and a drive head 107 are also provided; a grabbing drive element 109 is provided above the frame 101, which is preferably a linear drive element, such as a linear motor or a cylinder; the cylinder body of the grabbing drive element 109 is fixed on the frame 101; the piston rod 1092 of the grabbing drive element 109 is connected to the drive head 107, so as to drive the drive head 107 to perform lifting and lowering movements; the drive head 107 and the grabbing drive element 109 are located in the middle, and two inner support claws 103 are provided on both sides, and the two inner support claws 103 are hinged to the drive head 107 through the rocker arm 106, and both ends of the rocker arm 106 are provided with a hinge shaft 108; preferably, two rocker arms 106 are provided on each side, which are arranged in parallel to form a parallelogram. Fig.25 , Fig.26When the piston rod 1092 of the grabbing driving element 109 extends downward, it drives the driving head 107 to move downward, thereby causing the rocker arm 106 to flip inward, driving the inner supporting claws 103 on both sides to move inward, so that the claw hooks 105 on both sides are separated from the hanging ears 95 of the magnetic medium box 9; and when the piston rod 1092 of the grabbing driving element 109 retracts upward, it drives the driving head 107 to move upward, thereby causing the rocker arm 106 to flip outward, driving the inner supporting claws 103 on both sides to move outward, so that the claw hooks 105 on both sides open outward, extend into the hanging ears 95 on both sides of the magnetic medium box 9, and connect with the hanging ears 95, so as to facilitate the carrying mechanism to carry the magnetic medium box 9.

[0154] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A vertical ring-type superconducting high gradient magnetic separator, characterized in that: One side is the magnetic selection area, and the other side is the cleaning area. The magnetic medium box is transferred between the two areas to form a circular motion of the magnetic medium box. The magnetic separation area includes a superconducting magnetic system, a slurry distributor, a separation tank, and a magnetic medium box drive device; The superconducting magnetic system is located in the middle of the magnetic separation area, with a superconducting coil in the middle. The inner side of the superconducting coil is a magnetic field cavity, which is a cylindrical cavity. A ferromagnetic shield is provided on the outer side of the superconducting coil. Both ends of the cylindrical cavity of the magnetic field cavity extend outward to both ends of the ferromagnetic shield to form a cylindrical installation cavity. A slurry distributor and a separation tank are respectively installed in the installation cavity. The length of the slurry distributor is greater than the length of the ferromagnetic shield, and the slurry distributor is located at the upper part of the installation chamber; The middle of the slurry and water distributor is a slurry and water distribution chamber, which is located in the installation chamber; the interior of the slurry and water distribution chamber forms two relatively independent slurry distribution chambers and water distribution chambers; the bottoms of the slurry distribution chamber and the water distribution chamber are provided with outlet holes; The two ends of the pulp and water distribution chamber extend outwards, and are respectively provided with a pulp inlet and a water inlet; the pulp inlet and the water inlet are both located outside the two ends of the ferromagnetic shield; the pulp distribution chamber is connected to the pulp inlet and is located on the input side of the magnetic separation zone; the water distribution chamber is connected to the water inlet and is located on the output side of the magnetic separation zone; The length of the sorting tank is greater than the length of the pulp and water distributor; the sorting tank comprises a sorting shell, the interior of which is a cavity; the middle part of the sorting shell is a cylindrical tube, which is installed in the magnetic field cavity, and the upper part of the sorting shell accommodates the pulp and water distribution cavity; The lower part of the sorting tank is a discharge chamber; a magnetic medium box series channel is formed between the top of the discharge chamber and the bottom of the pulp and water distribution chamber, and the magnetic medium box series channel is located in the middle of the height direction of the magnetic field chamber and surrounds the axis of the magnetic field chamber; The non-cylindrical area of ​​the sorting shell is provided with an opening at the top, that is, the slurry inlet and water inlet of the slurry and water distributor pass through, and the magnetic medium box is moved in or out; a magnetic medium box driving device is provided in the sorting shell, and the magnetic medium box driving device drives the magnetic medium boxes to be put together one by one to form a magnetic medium box string, and move in the magnetic medium box string channel; The magnetic medium box is a rectangular box surrounded by two side plates and two end plates and opened on the upper and lower sides. A plurality of middle partitions are vertically arranged inside the rectangular box to divide the rectangular box into a plurality of magnetic medium arrangement chambers. The middle partitions are parallel to the side plates. The magnetic medium arrangement chamber is provided with uniformly distributed magnetic media with a filling rate between 5% and 25%. The magnetic medium box is formed by connecting the end plates of two adjacent magnetic medium boxes together. The direction of the slurry dripping from the outlet hole of the slurry distribution chamber into the magnetic medium box, the length direction of the magnetic medium, and the direction of the magnetic field generated by the superconducting coil are three directions orthogonal to each other. The discharge chamber of the separation tank, close to the input side of the magnetic separation zone, is a non-magnetic mineral discharge chamber, and a non-magnetic mineral discharge port is provided at the bottom; The discharge chamber of the separation tank, the output side close to the magnetic separation area is the magnetic mineral discharge chamber, and the bottom is provided with a magnetic mineral discharge port; The cleaning area includes a cleaning pool, the upper part of which is provided with a conveying device, and the bottom of which is provided with a recovery hopper; The magnetic medium box driving device in the magnetic selection area includes a box pushing mechanism and a magnetic medium box string moving guide mechanism; The box pushing mechanism is installed at the input end of the sorting pool; the box pushing mechanism includes a pushing cylinder and a pushing block; the pushing cylinder shareholder is outside the shell end plate of the sorting shell, the pushing rod of the pushing cylinder passes through the shell end plate and is located in the sorting shell, and the end of the pushing rod of the pushing cylinder is connected to the pushing block; the pushing block can be driven by the pushing cylinder to move along the length direction of the sorting shell by a distance greater than or equal to the width of the side plate of one magnetic medium box; The magnetic medium box string moving guide mechanism includes slide rails located at both ends of the sorting pool; slide rail support plates are provided at both ends of the sorting shell, the slide rail support plates are arranged horizontally, and the middle is a hollow structure, so that the magnetic medium box placement area above the slide rail support plate is connected with the discharge chamber below the slide rail support plate; Slide rails are provided on both sides of the slide rail support plate in the width direction; both sides of the bottom of the magnetic medium box string are mounted on the slide rails; The magnetic medium box string moving guide mechanism includes a suspension guide channel formed by a roller assembly and located on the outer sides of the slurry and water distributing chamber of the slurry and water distributing device; The slide rail extends inwardly and overlaps with both ends of the suspension guide channel; The roller assembly fixes the rollers outside the pulp and water dispensing chamber on both sides through the wheel shaft; The upper parts of the side plates on both sides of the magnetic medium box extend upward beyond the end plates and are folded inwards to form hanging ears; The hanging ears on both sides of the magnetic medium box cooperate with the rollers of the roller assembly to realize the suspension support of the magnetic medium box; The number of magnetic medium boxes stored in the cleaning tank is less than the number of magnetic medium boxes in the magnetic medium box string in the sorting tank; The conveying device in the cleaning tank includes a belt conveying device and a roller conveying device; The belt conveyor device includes two belts arranged close to the two side walls of the cleaning tank, and the middle of the belts on both sides is a cavity; A roller conveyor is provided behind the belt conveyor; The front part of the roller conveyor is a driving roller, the rear part is a driven roller, and a stopper is provided at the end; A sprayer is provided above the cleaning tank; A transport mechanism is provided between the two ends of the magnetic separation area and the cleaning area, and the transport mechanism is provided with a grabbing mechanism, which drives the magnetic medium box to transfer the magnetic medium box along the connecting section of the cleaning tank; The grabbing mechanism includes a frame connected to the execution end of the transport mechanism; There are slideways on both sides of the lower part of the frame; there are 2 inner support claws; The upper part of the inner support claw is installed in the slide groove through a sliding pin, and the inner support claw can be telescopically moved along the slide groove by the sliding pin; The bottom of the inner supporting claw extends outward to form a claw hook, and the claw hook cooperates with the hanging ear of the magnetic medium box; A grabbing driving element is provided above the frame, and a cylinder of the grabbing driving element is fixed on the frame; The piston rod of the grab driving element is connected to the driving head; The drive head and the grab drive element are located in the middle; The inner sides of the inner supporting claws on both sides are hinged to the driving head through a swing rod.

2. The vertical ring-type superconducting high gradient magnetic separator according to claim 1, characterized in that: There are more than 2 pushing cylinders, and all the pushing cylinders push the pushing block synchronously; The pushing block is arranged at a height position along the center of gravity of the magnetic medium box, and the pushing block pushes the material along the center of gravity of the magnetic medium box.

3. The vertical ring-type superconducting high gradient magnetic separator according to claim 1, characterized in that: The bottom plate of the pulp and water dispensing chamber extends to both sides along the width direction to form a support plate; The supporting plate is located below the roller assembly.

4. The vertical ring-type superconducting high gradient magnetic separator according to claim 1, characterized in that: A chamber partition is provided inside the pulp and water distribution chamber to divide the pulp and water distribution chamber into a pulp distribution chamber and a water distribution chamber; the chamber partition is arranged toward the output side of the magnetic separation area; The length of the slurry distribution cavity in the magnetic field cavity is greater than the length of the water distribution cavity in the magnetic field cavity; The length ratio of the slurry distribution cavity in the magnetic field cavity to the length of the water distribution cavity in the magnetic field cavity is 2:

1.

5. The vertical ring-type superconducting high gradient magnetic separator according to claim 1, characterized in that: A screw conveying mechanism is provided in the non-magnetic mineral discharge chamber of the discharge chamber; The driving end of the screw conveying mechanism is located outside the shell end plate of the sorting shell; The propeller blades of the screw conveying mechanism run through the entire magnetic field cavity.

6. The vertical ring-type superconducting high gradient magnetic separator according to claim 5, characterized in that: The propeller blades of the screw conveying mechanism are arranged in two directions in the installation chamber, and the ends of the rotating conveying of the propeller blades are provided with non-magnetic mineral discharge ports respectively; There are two non-magnetic mineral discharge ports, which are located outside the two ends of the ferromagnetic shield.

7. A method for using a vertical ring-type superconducting high gradient magnetic separator, characterized in that: The vertical ring-type superconducting high gradient magnetic separator according to any one of claims 1 to 6, when in use: The magnetic medium boxes are sequentially connected together to form a magnetic medium box string, which circulates through the magnetic field cavity formed by the superconducting coil; A slurry distributor is provided above the magnetic field cavity to drip the slurry into the magnetic medium box; The magnetic medium box is equipped with magnetic medium, which has magnetism in the magnetic field cavity and absorbs the magnetic minerals in the dripping slurry. The other slurry falls into the non-magnetic mineral discharge cavity below for discharge. The magnetic medium box takes the magnetic mineral out of the magnetic field cavity, the magnetic medium is demagnetized, and the magnetic mineral falls off and falls into the magnetic mineral discharge cavity below for discharge; The magnetic medium box leaves the magnetic field area and moves to the cleaning area, where the inside of the magnetic medium box is flushed to completely remove the magnetic minerals for further collection; After being cleaned, the magnetic medium box is transported back to the entrance of the magnetic field cavity for recycling.

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