489results about "High gradient magnetic separators" patented technology

The invention belongs to the technical field of magnetic separation equipment, and particularly discloses an air-blowing anti-blocking magnetic conduction module and a magnetic separator. The air-blowing anti-blocking magnetic conduction module comprises a center shaft, a plurality of magnetic conduction meshes are installed on the center shaft, an airflow channel is formed in the center shaft, circulation gaps are formed between the magnetic conduction meshes, and air outlet holes capable of distributing airflow to the circulation gaps are formed in the center shaft. The magnetic separator comprises a rack, an annular electromagnetic device and a material pipeline are arranged on the rack, and an air-blowing anti-blocking magnetic conduction module is installed in the material pipeline. According to the air-blowing anti-blocking magnetic separator, the magnetic conduction module in the magnetic separator is improved, in the magnetic separation process, air flow can be introduced into circulation gaps formed between the magnetic conduction meshes through the air flow channels, the air outlet holes and the like in the air-blowing anti-blocking magnetic conduction module, the air flow penetrates through meshes of the magnetic conduction meshes along with flowing of materials, and finally the air flow and the materials are discharged together; therefore, the passing ability of the materials is improved, the working efficiency of the magnetic separator is improved, meanwhile, tailings can be reduced, and waste of useful materials is reduced.

The invention relates to the technical field of nano magnetic bead preparation, and discloses a magnetic bead continuous separation device. The magnetic bead continuous separation device comprises a magnetic bead separator, a magnetic field generating device and a driving device, the driving device is used for driving the magnetic field generating device to be close to or away from the side wall of the magnetic bead separator, the magnetic bead separator is hollow, one end of the magnetic bead separator is provided with a first liquid inlet and a second liquid inlet, and the other end of the magnetic bead separator is provided with a first liquid outlet and a second liquid outlet. According to the invention, a plurality of separation processes can be integrated in the same structure, so that the system configuration is simplified, and the requirements of automation and large-scale continuous treatment in the magnetic bead purification process are effectively met.

Apparatus and associated methods relate to separate ferromagnetic impurities from bulk battery materials. In an illustrative example, a ferromagnetic impurity separation system (FISS) may receive a sample vessel including an enclosed sample of bulk battery materials. The FISS, for example, may include a variable magnetic flux generator (e.g., an electromagnet) disposed at a position separated from the sample vessel. The FISS may also include an agitation unit having a translational motor and a rotational motor configured to rotate the sample vessel about a central axis, and to translate a position of the central axis of the sample vessel. For example, in an operation mode, the variable magnetic flux generator and the agitation unit may apply a predetermined magnetic flux, a predetermined angular velocity and a predetermined velocity to the sample vessel. Various embodiments may advantageously separate ferromagnetic impurities from the enclosed sample concisely without contaminating the sample.

The invention provides an easy-to-scale efficient biological magnetic separation system and method and application. The magnetic separation method comprises the following steps: marking a target object in a to-be-detected suspension by adopting magnetic nanoparticles, and putting the marked to-be-detected suspension into a separation container; a modularized magnet array is arranged in the separation container, the modularized magnet array is composed of permanent magnets, and the permanent magnets are assembled into the cuboid modularized magnet array; the surface of the permanent magnet is coated with a polytetrafluoroethylene coating; the modularized magnet array moves in the suspension under the control of a driving magnet arranged outside the separation container to generate a dynamic gradient magnetic field, and a target object is captured by the modularized magnet array under the action of the gradient force of the magnetic field; removing the liquid in the separation container; adding the resuspension into a separation container, and recovering a target object by physical ultrasonic washing; or adding a chemical dissociation solution into the separation container to recover the target object.

The present invention discloses a large electromagnetic washing machine, which belongs to the technical field of mineral selection equipment, including a vertically arranged sorting drum, wherein a plurality of excitation coils are sleeved on the outside of the sorting drum from top to bottom, and adjacent excitation coils are arranged at intervals; a control system, wherein the control system can control all the excitation coils to be cyclically powered on and off in an orderly manner, wherein within a time period, the excitation coil between every two excitation coils is powered off, while the two adjacent excitation coils on both sides of the powered-off excitation coil are powered on, and after each time period, the next adjacent excitation coil along the axis of the sorting drum is powered off, and the two adjacent excitation coils on both sides of the corresponding powered-off excitation coil are powered on, until all the excitation coils are powered off and the cycle repeats again. The above structure can effectively solve the magnetic attenuation phenomenon that occurs when the diameter of the sorting drum increases by integrally controlling all the excitation coils and cyclically powering on and off, and is suitable for large-scale washing machines.

The invention discloses a beneficiation method for concentrate regrinding reinforced copper-molybdenum mixed rough concentrate magnetic levitation combined separation. The method comprises the following steps: (1) carrying out two-stage magnetic separation on the copper-molybdenum bulk concentrate to obtain a magnetic product and a non-magnetic product; (2) the magnetic products and the non-magnetic products are subjected to particle size control regrinding treatment, so that the copper minerals and the molybdenum minerals are further subjected to monomer dissociation, and agglomeration structures among the minerals are scattered; (3) preferential molybdenum flotation and copper flotation operation is conducted on reground ore pulp of magnetic separation magnetic products, after magnetic separation non-magnetic products are combined, the reground ore pulp is directly subjected to molybdenum flotation operation, an inhibitor, a collecting agent and a foaming agent are added in a segmented mode in the molybdenum flotation operation, and an adjusting agent, a dispersing agent, an activating agent, a collecting agent and a foaming agent are added in a segmented mode in the copper flotation operation; the concentrates obtained through the flotation operation are copper concentrates and molybdenum concentrates. The method improves the grade of the molybdenum concentrate, reduces the copper inclusion amount, stabilizes the product quality, and improves the copper-molybdenum separation efficiency and the recovery rate of copper and molybdenum.

The invention relates to a magnetic medium box device and method for analyzing a high-gradient magnetic separation capture mechanism, and belongs to the technical field of high-gradient magnetic separation process mechanism research. The magnetic medium box device comprises a cooling chamber and a magnetic medium stack, the magnetic medium stack is formed by vertically stacking a plurality of freely detachable magnetic medium units, the cooling chamber is a hollow annular cavity, and a liquid nitrogen inlet and a liquid nitrogen outlet are formed in the top of the cooling chamber. When the magnetic medium box device is used for analyzing a high-gradient magnetic separation capturing mechanism, firstly, a plurality of magnetic medium rods and positioning pieces on the two sides of the magnetic medium rods form magnetic medium units, and after a plurality of magnetic medium units are placed into an inner ring space of a cooling chamber, the magnetic medium box device is assembled; putting the magnetic medium box device into a high-gradient magnetic separator, starting a magnetic separation test, after the test is finished, keeping a magnetic field unchanged, introducing a proper amount of liquid nitrogen into the cooling chamber through a liquid nitrogen inlet, disconnecting the magnetic field after particles captured on the surface of the magnetic medium are completely frozen, taking out the magnetic medium box device, and sequentially disassembling the magnetic medium units, and the particles captured on each magnetic medium rod are independently washed with clear water, collected, detected and analyzed. By means of the indirect heat transfer effect of the liquid nitrogen cooling chamber, rapid freezing and accurate collection of particles on the magnetic medium are achieved, and the device and method which are easy to operate are provided for high-gradient magnetic separation capture mechanism analysis experiments.

The invention relates to an efficient separation and comprehensive recovery method based on copper-nickel complex platinum-palladium concentrate. The efficient separation and comprehensive recovery method comprises the following steps: (1) smelting and enriching; (2) carrying out two-stage cascade blowing enrichment; (3) stage selective crystallization; (4) separating mixed ore; (5) selective separation of alloyed gold; (6) separating copper-nickel bulk concentrate; and (7) mixing the nickel sulfate crystal obtained in the step (5) and the nickel oxide obtained in the step (6), feeding the mixture into a reverberatory furnace, smelting to obtain a nickel anode plate with crude nickel as a main component, and then feeding the nickel anode plate into an electrolysis process for electrolysis to obtain cathode nickel, anode mud and silver-cobalt slag products. According to the method, valuable metals such as platinum, palladium, gold, silver, copper, nickel and cobalt in the complex platinum-palladium concentrate can be efficiently separated and recovered, the separation effect is good, the comprehensive recovery rate is high, comprehensive recycling of resources is fully achieved, the problems that an existing recovery process is poor in recovery effect and high in cost are solved, and good economic benefits and social benefits are achieved.

The present invention concern a method and a device for the isolation of non-magnetic cells from a heterogeneous sample solution containing biological material including desired and undesired cells. The method comprises the steps of: —adding magnetic or magnetizable particles to the sample, wherein said particles have sizes in a range from 100 nm to 4 μm and exhibit surface components which support specific association with target cells, wherein said target cells comprise are either said desired or said undesired cells; —decreasing said external magnetic field gradient; —incubating said sample solution with said magnetic particles to obtain a magnetized cell fraction; —washing said magnetized cell fraction using a washing solution to reduce non-specific binding; —increasing said external magnetic field gradient; —separating said magnetized cell fractionation of target cells from said sample; wherein said sample solution is subjected to an external magnetic field gradient throughout said adding, incubating, washing and separating steps, and wherein said sample solution is rotated at least during said adding, incubating and washing steps.

The invention discloses a vertical ring magnetic separation device adopting a saddle-shaped coil and a magnetic separation method of the vertical ring magnetic separation device, and relates to the technical field of mine metallurgy, the vertical ring magnetic separation device comprises an integral support, a magnet system, a rotating ring, a feeding assembly and a discharging assembly, and the magnet system is fixedly arranged on the integral support and surrounds part of the rotating ring; the magnet system comprises at least one saddle-shaped coil, and the arc-shaped face, facing the rotating ring, of the saddle-shaped coil is matched with the ring face of the rotating ring. The saddle-shaped coil is adopted, the arc-shaped working face of the saddle-shaped coil is matched with the height space of the annular contour of the rotating ring, magnetic field distribution is fundamentally optimized, magnetic field energy is highly concentrated and accurately acts on a magnetic medium filled in the rotating ring, the field intensity far exceeding that of a traditional runway-shaped coil can be obtained, and the collecting capacity of weak magnetic minerals is remarkably improved; the optimization of the magnetic field further reduces the dependence on the magnetic conductive yoke, so that the overall structure weight of the magnet system is reduced, and the cost is reduced.

A method and system for separating valuable material, such as precious metals and rare earth elements, from a raw material, such as coal, is disclosed. The system may include a crusher or pulverizer for producing finely crushed material. This crushed material may be made into a slurry and placed into an econosizer for separating material by its specific gravity. High specific gravity material may be further refined using magnets, separators, or centrifuges, among other disclosed components of the system.

The invention belongs to the technical field of magnetic separation equipment, and particularly discloses a leakage-proof magnetic separator which comprises a rack, an electromagnetic generation device is arranged on the rack, the electromagnetic generation device is provided with a vertically-arranged material pipeline, an electromagnetic coil is arranged in the electromagnetic generation device, and a magnetic conduction module capable of moving up and down is installed in the material pipeline. The magnetic conductive module comprises a central pipe, a plurality of mesh supports are connected to the central pipe, magnetic conductive meshes are mounted on the mesh supports, annular mounting grooves are formed in the outer edges of the mesh supports, hollow elastic rubber rings are mounted in the annular mounting grooves, and connecting pipes are arranged on the hollow elastic rubber rings. And the connecting pipe is communicated with the central pipe through an airflow channel arranged on the mesh bracket. According to the magnetic separator, the magnetic conduction module and the mounting structure thereof are improved, the gap between the mesh support and the material pipeline can be blocked in the magnetic separation stage, the problem that materials directly leak downwards through the gap between the magnetic conduction mesh and the material pipeline is solved, and the iron removal effect of the magnetic separator is improved.

The invention provides a method and a system for preparing battery-grade sodium carbonate from industrial sodium carbonate, and solves the problems of high magnetic impurity residue, non-uniform particle distribution, insufficient moisture control and the like in the prior art. The method comprises the following steps: removing agglomerated powder through vibration screening; micron-grade and submicron-grade magnetic foreign matters are synergistically removed by adopting multi-grade magnetic separation, so that the content of the magnetic foreign matters is less than or equal to 500ppb; particle distribution is precisely regulated and controlled in combination with physical smashing, and the moisture increment of materials is controlled to be smaller than or equal to 0.1% through a closed-loop circulation dehumidification system. The system integrates a raw material pretreatment unit, a magnetic separation unit, a crushing unit and a humidity control unit, and adopts a temporary storage bin circular separation and temperature-humidity interlocking control module to realize collaborative optimization of process parameters. According to the method disclosed by the invention, the limitation of high impurity residue and high energy consumption in the traditional process is broken through by virtue of full-process collaborative design of magnetic separation, crushing and dehumidification, and the obtained battery-grade sodium carbonate meets the standard and is suitable for efficient preparation of the sodium-ion battery positive electrode material.

The utility model discloses a medium box for fine fraction separation of a vertical ring high-gradient magnetic separator, which belongs to the technical field of magnetic mineral separation equipment and comprises two fixing plates. At least one supporting plate is located between the two fixing plates. The two ends of the multiple reinforcing medium rods are connected with the fixing plate and penetrate through the supporting plate. The multiple reinforcing medium rods are distributed along the edge and form a medium containing cavity with the fixing plate. A plurality of spaced medium rods are positioned in the medium accommodating chamber, and two ends of the spaced medium rods are connected with the fixing plate and penetrate through the supporting plate; the diameter of the spacing medium rod is not greater than that of the reinforcing medium rod; the magnetic medium is embedded in a gap between the adjacent interval medium rods; the reinforcing medium rods and the spacing medium rods penetrate through the supporting plate and are fixedly connected with the fixing plate, so that the structural strength can be improved; the reinforcing medium rods, the spacing medium rods and the magnetic medium are arranged in order, so that a compact mineral separation medium can be formed, and the recovery rate of fine-fraction minerals is increased; and the magnetic medium can be conveniently pulled out and cleaned, so that the cleaning difficulty is reduced.

The invention relates to the technical field of ore separation, and discloses a multi-stage photoelectric-jigging-magnetic separation synergistic efficient ore separation process which comprises the following steps: A, material pretreatment and particle size regulation and control: raw ore raw materials are treated through crushing and screening equipment; the method comprises the following steps of: adding the raw materials into a magnetic separator to obtain a coarse-fraction product with the particle size range of 5-100mm and a fine-fraction product with the particle size range of 0.5-5mm, and cleaning and drying the products to remove surface dust and pollutants. Sequential and parallel recognition and sorting of multi-dimensional physical attributes such as color (photoelectricity), density (jigging) and magnetism (magnetic separation) of ore particles are achieved, the function limitation of a single sorting method is overcome through the multi-technology coupling mechanism, and a large amount of waste rock is efficiently thrown at the front end through photoelectric pre-sorting; the enriched valuable minerals can be intensively treated by subsequent gravity separation and magnetic separation equipment, and the unit operation efficiency is improved.

The present invention provides an apparatus for conducting an assay in a microfluidic system comprising magnetic beads, said apparatus comprising: a platform upon which a microfluidic system can be mounted, one or more actuators having a magnet, configured to directly influence movement of magnetic beads housed within a microfluidic system when a microfluidic system is mounted on said platform, and a control means configured to control relative movement of the one or more magnets, and a microfluidic system when mounted, to enable the magnet to trace a desired path across a mounted microfluidic system, said magnet being positionable at any x- and y-coordinates of a mounted microfluidic system, wherein said apparatus further comprises: a) at least one rotary actuator configured to enable magnet movement in an x-axis, and / or b) a means for moving a mounted microfluidic system in a stepwise fashion.

The invention provides a high-pressure high-gradient magnetic separator and a magnetic separation method thereof, and relates to the technical field of magnetic separation. The exciting coil is embedded into the inner wall of the inner cavity of the magnet yoke; the high-pressure separation cavity comprises an outer cylinder body, an inner cylinder body and a magnetic medium, the outer cylinder body is fixedly arranged in the inner cavity, the inner cylinder body is embedded into the outer cylinder body in a sliding mode, and the magnetic medium is arranged in the inner cylinder body; and the ore feeding, water feeding and gas feeding device is communicated with the inner barrel through a pipeline, is used for inputting to-be-magnetically separated ore pulp containing high-pressure gas into the inner barrel, and can be connected with the discharging container for circulating high-pressure magnetic separation. The high-gradient magnetic separation device can be used for developing high-gradient magnetic separation test research under the high-pressure condition, liquid-solid ore pulp in a traditional magnetic separation cavity is changed into high-pressure gas-liquid-solid mutual soluble ore pulp, and the adsorption effect among particles under the high-gradient magnetic field effect is weakened through Van der Waals repulsive force of high-pressure gas dissolved in the high-pressure gas-liquid-solid mutual soluble ore pulp; the method can be used for efficient separation of micro-fine particle level weak magnetic minerals.

The invention discloses a preparation method of high-purity fused quartz powder, and the preparation method specifically comprises the following steps: S1, crushing; s2, fully washing the quartz powder with water, and then removing impurities; s3, feeding the crushed particles subjected to impurity removal into a pickling tank for pickling; s4, dissolving the crude product in two times of alkaline solution, carrying out alkali washing treatment, and carrying out ultrasonic cleaning after the treatment is completed; s5, the cleaned raw materials are fed into a heating furnace to be subjected to high-temperature heat treatment; s6, magnetic separation is repeated; and S7, further crushing into fused quartz sand of which the particle size is less than 2mm by adopting an impact crusher. According to the preparation method of the high-purity fused quartz powder, circulating pickling is adopted, the optimal pickling condition acid concentration, acid dosage, pickling time, pickling temperature and the like are selected, metal impurities are effectively removed, and the purification effect is good; repeated magnetic separation is carried out under high and low field intensities, the magnetic separation effect is good, magnetic impurities are preliminarily and efficiently removed, and the purity of the whole manufactured product is high.

Magnetic systems and methods for oxygen separation and purification from fluids utilizing the paramagnetic properties of oxygen. A magnetic field gradient is established in a tube having a first end in flow communication with a source of a fluid containing oxygen. The fluid is flowed through the tube. The magnetic field gradient causes oxygen to be enriched in the fluid on a first interior side of the tube as compared to a second interior side of the tube. For a fluid like air having oxygen, a paramagnetic substance, and other, e.g., diamagnetic, components like nitrogen, argon, carbon dioxide and water vapor, the technology of the disclosure effectively separates oxygen molecules from the other components in magnetic field gradients of sufficient magnitude.

The invention relates to the technical field of gravel production, in particular to a graded magnetic separation washing engineering sand making system and process, the graded magnetic separation washing engineering sand making system comprises a joint dispatching subsystem, a feeding device, a sand making device, a wet screening device, a first sand washing device, a magnetic separation device, a second sand washing device and a post-processing subsystem, and the joint dispatching subsystem is used for achieving production and transportation regulation and control of all the devices; the sand making equipment is used for producing artificial sand, the wet screening equipment is used for screening the artificial sand and provided with a screen A and a screen B located below the screen A, the aperture of the screen B is smaller than that of the screen A, an oversize outlet of the screen A is connected with a feeding port of the sand making machine, and a feeding port of the first sand washing equipment is connected with an oversize outlet of the screen B; a feeding hole of the magnetic separation equipment is connected with an undersize outlet of the screen B, a feeding hole of the second sand washing equipment is connected with a concentrate outlet of the magnetic separation equipment, and a feeding hole of the post-treatment subsystem is connected with a tailing outlet of the magnetic separation equipment. The method has the advantages of being high in practical operability, good in economical efficiency and environmentally friendly.

The invention discloses a process for reducing magnetic substances in battery grade lithium carbonate, and relates to the technical field of lithium battery materials, in particular to a process for reducing magnetic substances in battery grade lithium carbonate, which comprises the following steps: pretreatment of brine, inclined plate sedimentation, plate-and-frame pressure filtration, multi-medium filtration and security filtration; performing magnesium-lithium separation through an electric driving membrane, and performing high-efficiency lithium-magnesium separation through an ion selective electric driving membrane; refining reaction: deeply removing calcium, magnesium and sulfate ions by adopting sodium hydroxide and barium chloride solution; lithium carbonate is converted into crystals, and the crystals are converted through a sodium carbonate solution; demagnetizing treatment: reducing the content of magnetic substances in the lithium carbonate through a multi-section and multi-stage demagnetizing process; and crushing the product, and controlling the particle size of lithium carbonate through airflow crushing equipment. Various impurities, including silt, suspended solids, colloidal substances and magnetic substances, in the raw material brine are effectively removed through an optimized multi-layer filtering technology, ion selective electrically-driven membrane separation, a refining reaction and a multi-stage demagnetizing process.

A system for extracting oxygen from a liquid includes a separator allowing a liquid to pass lengthwise through the separator to produce a liquid mixture with the liquid having at least a portion of oxygen removed from the liquid. The separator includes a wall surrounding an interior portion of a tube. The wall has at least one aperture formed in the wall. The separator also includes at least one magnet positioned adjacently to the at least one aperture. The magnet has a north pole end and a south pole end. A magnetic field gradient is formed between the north pole end and the south pole end, and extends into an interior portion of the tube. The system also includes a storage tank fluidly coupled to the at least one aperture for storing the at least a portion of the oxygen removed from the liquid via the separator.

The method comprises the following steps that raw iron lepidolite is prepared into an iron lepidolite ore product with the particle size being-200 meshes and accounting for 60% + / -3%, ore pulp is prepared, the feeding concentration of the ore pulp is adjusted to be 11% + / -2%, magnetic separation and roughing are conducted on the ore pulp, and roughing and pre-enrichment of the iron lepidolite ore are completed. According to the roughing pre-enrichment method for the iron lepidolite ore, the lithium concentrate product with the high Li2O grade and the high recovery rate can be obtained by optimizing the concentration and the granularity of the fed ore and adopting one-stage roughing, and the method has the advantages of being simple in process, short in flow, low in energy consumption, low in cost, small in loss of fine-grain lithium metal, high in separation efficiency, good in separation effect, environmentally friendly, economical and the like; the method can be widely applied to pre-enrichment of the iron lepidolite ores, is beneficial to subsequent processing treatment, also remarkably reduces the processing and production cost, is high in use value and good in application prospect, and plays an important role in promoting wide application of different grades of iron lepidolite ores.

The present application relates to the technical field of mineral processing, and more particularly to a manganese ore magnetic separation device and dry beneficiation process, wherein the magnetic separation device comprises a mounting frame, a first channel, a second channel, a distribution plate, a magnetic roller, a conveyor belt, a feeding mechanism and an auxiliary mechanism. The magnetic roller is composed of a roller shaft, an end cover and a plurality of magnetic rings, the magnetic rings comprising a magnetic gathering plate and a magnetic block and being tightly arranged by a screw rod. The feeding mechanism realizes uniform feeding through a vibration and suspension system. The auxiliary mechanism realizes the vibration and shunting of the ore sand through a guide strip. The beneficiation process comprises crushing, grinding, classification, roasting, magnetic separation and post-processing. The magnetic separation adopts a two-stage type of roughing and cleaning to improve the recovery rate. The present application has the advantages of high separation efficiency, high concentrate purity, low energy consumption, strong adaptability and the like, and is suitable for large-scale industrial production.

The spherical quartz powder purification process comprises the following steps that S1, quartz raw ore is coarsely crushed to be 25 mm or below through a cone crusher, then ground through a ball mill and screened out with the proper particle size through a screening cylinder; s2, scrubbing the quartz particles by using ore pulp with the concentration of 50-60%, and synchronously separating soil; s3, removing ferromagnetic minerals and magnetic impurities in the quartz by adopting a two-stage high-gradient magnetic separator; and S4, soaking in a mixed solution of hydrochloric acid and sulfuric acid at 60-75 DEG C for 4-8 hours, removing residual metal, oxidizing, and dehydrating and drying. According to the method, the quartz raw ore is subjected to pretreatment such as crushing and screening, appropriate quartz powder particles are screened out and cleaned, then the two-stage high-gradient magnetic separator is adopted, iron, magnetism and mixture impurities with different strengths mixed in the quartz powder are fully removed, consumption of mixed liquid by the impurities in the later period is avoided, and the quality of the quartz powder is improved. According to the invention, multiple separation of substances in the treatment process is effectively reduced.

The invention discloses a process for recovering apatite from iron ore dressing tailings through flotation, and belongs to the technical field of ore dressing. The method comprises the following steps: 1, carrying out high-gradient magnetic separation treatment on the iron separation tailings, recovering and removing magnetic iron-containing minerals, returning the removed iron-containing minerals to an iron separation main process, feeding the tailings into a chute to remove large-particle gangue minerals, and then feeding the tailings into a thickening pool to be concentrated; secondly, sulfide ore flotation and gypsum flotation are sequentially carried out on the bottom flow products of the thickening pool to remove impurities prone to interference, then apatite collecting and direct flotation are carried out, and apatite concentrate is obtained; and 3, carrying out ultrafine grinding dissociation and impurity selective argillization on the apatite concentrate, and then carrying out apatite closed-loop concentration to obtain a qualified apatite concentrate product. According to the method, the apatite in the iron ore dressing tailings can be well recycled, and the method has great economic feasibility.

The utility model discloses a high gradient magnetic separator which comprises a rack, a feeding hopper, a first discharging hopper, a second discharging hopper, a driving motor, a rolling ring, an electromagnetic coil and a water spraying pipe, the rolling ring is rotationally connected to the rack, the driving motor is used for driving the rolling ring to rotate, a plurality of material rotating boxes are arranged on the rolling ring, and the electromagnetic coil is arranged in the material rotating boxes. The plurality of material transferring boxes are annularly and sequentially arranged at intervals; according to the magnetic separator, the feeding hopper and the rolling ring are arranged, the feeding hopper inputs ore materials into the multiple material rotating boxes of the rolling ring, then the rolling ring is driven by the driving motor to rotate and is matched with the electromagnetic coil so that iron powder in the material rotating boxes can be aggregated into iron balls, and then water is sprayed to the material rotating boxes through the water spraying pipe so that ore can form ore pulp; and finally, ore pulp is discharged to the first discharging hopper, iron balls are discharged to the second discharging hopper, iron powder is separated from ore, the overall structure is practical and reliable, and the automation degree is high.

A magnetic collection unit generates a magnetic field in an inside of a reaction cell and magnetically collects the magnetic particles in the suspension on an inner wall surface of the reaction cell, and includes a magnetic field generation unit that includes two magnets having a length equal to or longer than a distance from a liquid surface of the suspension in the reaction cell to a bottom surface of the reaction cell and generating a magnetic field across a range from the liquid surface to the bottom surface and includes a non-magnetic body, where the two magnets are disposed such that surfaces not having a magnetic pole face each other with the non-magnetic body being sandwiched therebetween, and opposite poles of the two magnets face the reaction cell; and a moving mechanism that moves the magnetic field generation unit between a magnetic collection position and a retreat position.

The invention discloses a dredging device for an ore unloading water pipe of a vertical ring high-gradient magnetic separator, which belongs to the technical field of flushing ore unloading equipment, and comprises a separation rotating ring capable of rotating, and a magnetic medium box is arranged on the circumferential surface of the separation rotating ring; a plurality of water spraying holes are formed in the bottom of the ore discharging water pipe; the movable cross beam is arranged in the ore unloading water pipe, a plurality of conducting columns are arranged on the movable cross beam, and a high-pressure air channel is formed in the movable cross beam; an air injection hole communicated with the high-pressure air channel is formed in the conduction column, and a first valve is arranged between the air injection hole and the high-pressure air channel; the movable cross beam can move between a first position and a second position; at the first position, the conducting column is separated from the water spraying hole; at the second position, the conducting column extends into the water spraying hole, and the first valve is in an open state; the conducting column can extend into the water spraying hole to directly eject impurities in the water spraying hole, meanwhile, ore unloading water quickly flows through the gap, high-pressure gas is sprayed out of the gas spraying hole, and the impurities on the inner wall of the water spraying hole are thoroughly removed through the combined action of the two.