WO2020186596A1 - Low-frequency alternating-current electromagnetic elutriating machine - Google Patents

Low-frequency alternating-current electromagnetic elutriating machine Download PDF

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Publication number
WO2020186596A1
WO2020186596A1 PCT/CN2019/084166 CN2019084166W WO2020186596A1 WO 2020186596 A1 WO2020186596 A1 WO 2020186596A1 CN 2019084166 W CN2019084166 W CN 2019084166W WO 2020186596 A1 WO2020186596 A1 WO 2020186596A1
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WO
WIPO (PCT)
Prior art keywords
ore
magnetic field
low
frequency
washing
Prior art date
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PCT/CN2019/084166
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French (fr)
Chinese (zh)
Inventor
刘风亮
陈雷
贾洪利
刘茂堂
刘岩
王磊
Original Assignee
山东华特磁电科技股份有限公司
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Priority claimed from CN201920331116.1U external-priority patent/CN209663493U/en
Priority claimed from CN201910198699.XA external-priority patent/CN109746117B/en
Application filed by 山东华特磁电科技股份有限公司 filed Critical 山东华特磁电科技股份有限公司
Priority to AU2019436089A priority Critical patent/AU2019436089B2/en
Publication of WO2020186596A1 publication Critical patent/WO2020186596A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/62Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
    • B03B5/66Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type of the hindered settling type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/30Combinations with other devices, not otherwise provided for

Definitions

  • the invention relates to the technical field of magnetic separation equipment, in particular to a low-frequency alternating current electromagnetic elutriation machine.
  • domestic magnetic separation plants generally use magnetic separation equipment such as cylindrical magnetic separators and magnetic desilting tanks.
  • the magnetic field strength of this type of equipment is relatively high, and the magnetic field force is relatively large, which has a strong magnetic agglomeration effect on the separation of magnetite. Therefore, there are inherent disadvantages such as “magnetic inclusions” and “non-magnetic inclusions”, which make the concentrate contain more gangue, which seriously affects the grade of the concentrate.
  • the process flow of this type of magnetic separation equipment is long and complicated, the medium ore circulation is too large, the water consumption is high, and the beneficiation cost remains high. It is contrary to the current green mining concept of improving quality and efficiency, saving energy and reducing consumption.
  • the non-magnetic inclusions inside the iron powder also fall into the washing drum, causing damage to the stable sorting environment in the drum.
  • the resulting concentrate grade is unstable.
  • the magnetic field gradually decreases along the cylinder wall to the center of the cylinder, making some areas in the cylinder become non-magnetic and weak magnetic areas. For this area, when the water flow is too large, the magnetic field cannot be used to absorb the fine-grained concentrate that rises with the water flow. Therefore, the constant magnetic field coil has little effect in a stable sorting environment.
  • the water flow or the amount of slurry fluctuates greatly, it cannot play a decisive role in controlling ore, resulting in ore running.
  • the lower end of the feed pipe is evenly distributed along the circumferential direction with ore outlets.
  • the ore distribution method is to feed the ore in a way that coincides with the axis of the washing drum.
  • the pulp reaches the bottom of the feed pipe, it passes through the holes in a direction perpendicular to the axis.
  • the cloth hole flows into the rising water flow. Because the cloth hole is far away from the inner cylinder wall, the magnetic field has weak binding force on the slurry. In this area, the magnetic link is basically not formed, and the magnetic tumbling effect cannot be produced. Because the settlement distance is too long Therefore, the unreasonable location and method of ore distribution and the too short settlement distance for the ore pipe are one of the key factors affecting the quality of the concentrate.
  • the water inlets of the traditional electromagnetic washing machine are evenly distributed on the horizontal circumference of the lower part of the washing drum, and holes are directly opened on the horizontal circumference, so that the water flow into the drum is in a disordered state, causing the concentrate that settles here to be disturbed again Dispersion will cause great damage to the concentrated concentrate.
  • the power supply of the traditional electromagnetic washing machine adopts direct current excitation, and the thyristor is alternately energized to generate alternating pulsating magnetic fields between the coils.
  • the concentrated ore powder located here is formed Magnetic chain
  • the concentrate powder in a fixed magnetic field only forms a magnetic chain
  • the concentrate particles are relatively immobile, unable to scrub and precipitate the internal non-magnetic inclusions.
  • the power is off, the magnetic chain disappears and the concentrate continues to sink. , Part of the fine-grained concentrate powder is discharged into the tailings along with the rising water flow and medium and fine-grained non-magnetic materials without magnetic adsorption.
  • the concentrate particles When coils 2, 4, and 6 are energized, the concentrate particles will rotate 180° from the state in the previous magnetic field cycle to form a magnetic link again.
  • the energization interval of the two coils is different due to the different selection environments, and the approximate range is 1 Between -6 seconds, while the magnetic tumbling effect is realized over and over again, the interval of the non-magnetic empty window also causes a large amount of fine-grained concentrate powder to be thrown to the tailings, resulting in a lot of waste of resources.
  • the technical problem to be solved by the present invention is to provide a low frequency AC electromagnetic washing machine with high concentrate grade and good sorting effect.
  • a low-frequency AC electromagnetic elutriation machine including: a washing drum, the bottom of the washing drum is provided with a concentrate cone, and the top of the washing drum is provided with an overflow device ,
  • the overflow device is installed with a ore supply device extending into the inside of the washing drum, a water supply device for supplying water to the inside of the washing drum is provided outside the washing drum, and the outer periphery of the washing drum is provided
  • the magnetic separation device includes a plurality of magnetic field coils sleeved on the outer circumference of the washing cylinder and spaced along the axial direction of the washing cylinder, and the magnetic field coils are fed with low-frequency alternating current.
  • the magnetic field coil includes a mining magnetic field coil located at the top and a plurality of traveling wave magnetic field coils located below the mining magnetic field coil.
  • the mine magnetic field coil is supplied with single-phase low-frequency alternating current, and several of the traveling wave magnetic field coils are supplied with three-phase low-frequency alternating current.
  • the frequency of the three-phase low-frequency alternating current is lower than 50 Hz, and the frequency of the single-phase low-frequency alternating current is lower than 50 Hz.
  • the frequency range of the three-phase low-frequency alternating current is 0.1-20 Hz
  • the frequency range of the single-phase low-frequency alternating current is 0.1-20 Hz.
  • connection mode of the several traveling wave magnetic field coils is a "Y” connection method or a " ⁇ " connection method.
  • the magnetic separation device further includes: an inductive magnetic ring, the inductive magnetic ring is arranged inside the washing barrel and corresponds to the position of the ore gathering magnetic field coil.
  • the inductive magnetic ring includes: a plurality of metal rings sleeved together and arranged concentrically, with spaces between adjacent metal rings, and reinforcing ribs fixedly connecting the adjacent metal rings are arranged at the spaces, The metal ring and the reinforcing rib jointly enclose a magnetic ring channel.
  • the innermost metal ring is fixed to the ore feeding device.
  • the axial cross section of the induction magnetic ring is in the shape of a shuttle.
  • the induction magnetic ring is made of high magnetic permeability material.
  • the overflow device includes an overflow sleeve and an overflow inner cylinder arranged inside the overflow sleeve.
  • the lower end of the overflow inner cylinder is fixedly connected to the top of the washing cylinder, and the overflow
  • the flow inner tube is the same diameter as the washing tube.
  • the ore feeding device includes: a ore feeding pipe, a support arm is fixed on the outer periphery of the upper end of the ore feeding pipe, the outer end of the support arm is fixed to the top of the overflow device, and the bottom of the ore feeding pipe Sealing, the outer periphery of the lower end of the ore feeding pipe is fixed with a plurality of ore distribution pipes communicating with the inner cavity, and the ore outlet of the ore distribution pipe is located in the axial position inside the washing drum and counted from top to bottom.
  • the middle positions of the second and third magnetic field coils are the same.
  • the radial position of the ore outlet of the ore distribution pipe inside the washing drum is at the middle of the distance between the inner wall of the washing drum and the outer wall of the ore feeding pipe.
  • the ore outlets of the multiple ore distribution pipes are arranged along the tangential direction.
  • the ore distribution pipe includes a radial section and a tangential section connected to the outer end of the radial section, the other end of the tangential section is the mine outlet, and the inner end of the radial section It is fixedly connected with the outer periphery of the lower end of the feeding pipe and communicates with the inner cavity.
  • the radial section of the ore distribution pipe is inclined downwardly relative to the ore supply pipe.
  • the outer periphery of the upper end of the feeding pipe is fixed with an inlet pipe communicating with the inner cavity.
  • the top of the feeding pipe is open.
  • the water supply device includes: a water jacket ring placed on the upper end of the outer wall of the concentrate cone, and the upper end of the inner wall of the concentrate cone is provided with a plurality of jet pipes communicating with the inner cavity of the water jacket.
  • the water outlet direction of the jet pipe is arranged tangentially and is consistent with the mine outlet direction of the ore feeding device.
  • the jet tube is provided with one layer, or two or more layers are arranged up and down, and each layer includes a plurality of the jet tubes; the positions of the jet tubes in adjacent layers are staggered.
  • the magnetic field coil of the low-frequency AC electromagnetic washing machine of the present invention is fed with low-frequency alternating current, when the magnetic field coil is energized, the concentrate powder in the alternating magnetic field not only forms a magnetic chain, but also the concentrate particles can move relative to each other, with flipping , Scrubbing function, so as to separate out the internal non-magnetic inclusions, improve the grade of the concentrate, and the sorting effect is good; at the same time, compared with the alternating current mode of direct current, it adopts low-frequency AC power supply for excitation, and there is no non-magnetic empty window period. A large amount of fine-grained concentrate powder is thrown into the tailings, avoiding resource waste.
  • the inside of the washing drum is equipped with an induction magnetic ring at the position corresponding to the mine magnetic field coil, after the mine magnetic field coil is energized, the magnetic field is induced on the induction magnetic ring inside the washing drum, which improves the magnetic force around the outer wall of the mine feeding device. It solves the problem of ore running along the outer wall of the mine feeding device due to large fluctuations of water flow or slurry.
  • a periodic low-frequency alternating current is passed into the ore magnetic field coil, so that the concentrate powder adsorbed on the induction magnetic ring is adsorbed by the induction magnetic ring, and it also has periodic magnetic tumbling.
  • the axial section of the induction magnetic ring is in the shape of a shuttle, the height of the metal ring from the outer ring to the inner ring is getting higher and larger, and the area is getting larger and larger, which can make the outer ring metal ring near the wall of the washing cylinder easier to reach magnetic saturation
  • This structure is conducive to the uniform distribution of the magnetic field, so that the magnetic field forms a magnetic screen in the area of the induction magnetic ring, which eliminates the magnetic medium and rich conjoined bodies and monomers. The concentrate escaped from the weak magnetic area to the tailings, causing runaway.
  • the frequency of low-frequency alternating current is lower than the frequency of power frequency alternating current 50Hz, during the magnetic separation process, the concentrate particles have enough time to swing to a sufficient swing in a certain flip state, creating a complete precipitation of internal non-magnetic inclusions.
  • the frequency can be adjusted to achieve the desired number of tumbling and scrubbing, so as to more effectively and controllably increase the concentrate grade and concentrate output.
  • the wiring method of the traveling wave magnetic field coil is "Y” connection method or " ⁇ ” connection method; the “Y” connection method can make the traveling wave magnetic field coil obtain high excitation current and high magnetic field strength to meet the requirements of medium and high magnetic fields.
  • the overflow inner tube and the washing tube have the same diameter, the flow velocity in the washing tube and the overflow inner tube are consistent, which solves the problem of ore running or nesting.
  • the axial position of the multiple ore outlets on the outer periphery of the lower end of the ore feeding pipe in the washing cylinder is consistent with the middle position between the second and third magnetic field coils from the top to the bottom, compared with the prior art , Lengthen the settling distance and magnetic separation path of ore powder, extend the time of magnetic separation, and improve the grade of concentrate. Because the ore outlet of the ore distribution tube is located in the inner wall of the washing drum, the radial position is in the middle of the distance between the inner wall of the washing drum and the outer wall of the feeding tube, and is close to the inner wall of the washing drum, so that the traveling wave magnetic field can interfere more effectively.
  • the concentrate quickly goes against the lean, weak conjoined and monomeric non-magnetic ore, accelerating the separation and improving the grade of the concentrate. Because the outlets of the multiple ore pipes are arranged in the tangential direction, synchronized with the rising rotating water flow, the sinking concentrate powder and the rising water flow are resistance to each other, preventing the concentrate powder from sinking too fast and lengthening the magnetic separation time , Improve the grade of concentrate.
  • the water supply device is arranged in the concentrate cone below the washing tube.
  • the position of the water supply device is lowered to avoid the disordered state of the water flow entering the washing drum, so as not to disturb the concentrate that settles down to the lower part of the washing drum, so as to avoid damaging the concentrated concentrate and ensure the smooth concentrate Concentrate to the concentrate cone.
  • the water outlet direction of the jet tube is arranged in a tangential direction and is consistent with the outlet direction of the ore cloth tube,
  • the water flow injected into the concentrate cone forms a rotating water flow in the cone.
  • the concentrate powder tumbling with the pulse continues to enter the rotating water flow in the concentrate cone due to the difference in density between the water and the concentrate powder.
  • the concentrate powder is subjected to a large centrifugal force, and the concentrate powder continues to move to the inner wall of the concentrate cone with the water flow, and finally the concentrate powder slides into the concentrate valve along the inner wall of the concentrate cone at the back of the jet tube, and is discharged into the concentrate Pool.
  • the multiple magnetic field coils of the magnetic separation device are fed with low-frequency alternating current, and the traveling wave magnetic field coil adopts the "Y"-shaped connection method or the " ⁇ "-shaped connection method, correspondingly
  • the position of the mine magnetic field coil is provided with an induction magnetic ring inside the washing drum; the outer periphery of the lower end of the feeding pipe of the ore feeding device is provided with multiple ore distribution pipes.
  • the axial positions of the ore outlet of the multiple ore distribution pipes are counted from top to bottom 2.
  • the middle position between the third magnetic field coils is the same, and the radial position of the outlet is at the middle of the distance between the inner wall of the washing tube and the outer wall of the feeding tube; the overflow inner tube of the overflow device has the same diameter as the washing tube
  • the water supply device is arranged under the concentrate cone under the washing drum; the low-frequency AC electromagnetic washing machine of the present invention realizes the sedimentation, chain connection, tumbling of the concentrate powder under the action of the rising water flow and the magnetic field coil passing low-frequency alternating current Friction, scrubbing and impurity removal, and finally enrichment and concentration by rotating water stream, high-grade beneficiation is realized, and the beneficiation has a wide range of applications.
  • Figure 1 is a front view of the structure of a low-frequency AC electromagnetic elutriation machine according to an embodiment of the present invention
  • Figure 2 is a top view of Figure 1;
  • Figure 3 is a top view of the induction magnetic ring in Figure 1;
  • Figure 4 is a sectional view of A-A in Figure 3;
  • Figure 5 is a front view of the ore feeding device in Figure 1;
  • Figure 6 is a cross-sectional view of B-B in Figure 5;
  • Figure 7 is a sectional front view of the concentrate cone in Figure 1;
  • Figure 8 is a top view of Figure 7;
  • Figure 9 is a "Y"-shaped wiring diagram of the traveling wave magnetic field coil in Figure 1;
  • Figure 10 is a schematic diagram of the circuit of Figure 9;
  • Figure 11 is a " ⁇ "-shaped wiring diagram of the traveling wave magnetic field coil in Figure 1;
  • Figure 12 is a schematic diagram of the circuit of Figure 11;
  • the low-frequency AC electromagnetic elutriation machine of the present invention includes: a washing drum 1, a concentrate cone 5 is welded and fixed at the bottom of the washing drum 1, and a concentrate cone 5 is provided at the lower end of the concentrate cone 5.
  • a valve 52 for adjusting the discharge of ore is installed at the mine mouth 51 and the concentrate mouth 51; an overflow device 2 is installed on the top of the washing drum 1; the overflow device 2 is installed with a ore feeding device 3 extending into the washing drum 1;
  • a water supply device for supplying water to the inside of the washing drum 1 is arranged outside the washing drum 1;
  • a magnetic separation device is arranged on the outer periphery of the washing drum 1, and the magnetic separation device includes sleeves on the outer circumference of the washing drum 1 and along the axial direction of the washing drum 1.
  • a plurality of magnetic field coils are arranged at intervals by the insulating plate 8.
  • the magnetic field coil is in the shape of an annular shape, and its inner ring is close to the outer wall area of the washing cylinder 1, and a cylindrical mica paper 10 is provided as an insulator.
  • the magnetic field coil includes a ore on the top
  • the magnetic field coil 11 and the traveling wave magnetic field coil 9 located below the magnetic field coil 11 are provided with an insulating plate 8 on the upper part of the magnetic field coil 11, and a non-magnetic metal plate 12 for pressing the coil is provided on the upper part of the insulating plate 8.
  • the outer circle of the magnetic metal plate 12 is the same as the outer circle of the upper circular plate 71 of the water jacket 7 described below.
  • the fastened traveling wave magnetic field coil 9 and the mining magnetic field coil 11 are located between the non-magnetic metal plate 12 and the upper circular plate 71
  • a cylindrical protective cover 13 is set in the room to prevent the ore pulp and water from damaging the traveling wave magnetic field coil 9 and the mine magnetic field coil 11.
  • a junction box 14 is fixed outside the protective cover 13, and the magnetic field coil is connected to the junction box 14 for low frequency Alternating current.
  • the traveling wave magnetic field coil 9 includes several equally spaced and evenly distributed coils, which are sequentially identified as the first traveling wave magnetic field coil 9a, the second traveling wave magnetic field coil 9b, and the second traveling wave magnetic field coil from top to bottom.
  • the traveling wave magnetic field coil 9 is connected to a three-phase low-frequency alternating current
  • the mining magnetic field coil 11 is connected to a single-phase low-frequency alternating current.
  • the frequency of three-phase low-frequency alternating current is lower than 50 Hz
  • the frequency of single-phase low-frequency alternating current is lower than 50 Hz, that is, both are lower than the frequency of power frequency alternating current.
  • the frequency range of the three-phase low-frequency alternating current is 0.1-20 Hz
  • the frequency range of the single-phase low-frequency alternating current is 0.1-20 Hz.
  • the wiring of several traveling wave magnetic field coils is a "Y" connection, that is: the first traveling wave magnetic field coil 9a and the fourth traveling wave magnetic field coil 9d are connected in series, and one end is connected The other end of the phase line U is connected to the common node; the second traveling wave magnetic field coil 9b is connected in series with the fifth traveling wave magnetic field coil 9e, one end is connected to the phase line V, and the other end is connected to the common node; the third traveling wave magnetic field coil 9c is connected to the first The six traveling wave magnetic field coils 9f are connected in series, one end is connected to the phase line W, and the other end is connected to the common node.
  • the traveling wave magnetic field coil can obtain high excitation current and high magnetic field strength to meet the requirements of medium and high magnetic field beneficiation.
  • the wiring of several traveling wave magnetic field coils can also adopt the " ⁇ " connection method, namely: the first traveling wave magnetic field coil 9a, the second traveling wave magnetic field coil 9b, and the third The traveling wave magnetic field coil 9c, the fourth traveling wave magnetic field coil 9d, the fifth traveling wave magnetic field coil 9e, and the sixth traveling wave magnetic field coil 9f are first connected, and the nodes of the first traveling wave magnetic field coil 9a and the sixth traveling wave magnetic field coil 9f are connected to each other.
  • the traveling wave magnetic field coil can obtain low excitation current and low magnetic field strength to meet the requirements of weak magnetic field beneficiation.
  • the magnetic separation device further includes: an induction magnetic ring 4 arranged inside the washing cylinder 1 and made of high magnetic permeability material, such as electrical pure iron or Q235A material, the induction magnetic ring 4 is set in the following
  • the ore feeding pipe 31 of the ore feeding device 3 corresponds to the position of the ore collecting magnetic field coil 11. The best way is that the horizontal axis of the induction magnetic ring 4 coincides with the horizontal axis of the mine magnetic field coil 11.
  • the induction magnetic ring 4 includes: a plurality of metal rings 41 sleeved together and arranged concentrically, with spaces between adjacent metal rings 41, and welded connections are arranged at the spaces to connect adjacent The reinforcing ribs 42 of the metal ring 41, the adjacent metal rings 41 and the adjacent reinforcing ribs 42 jointly enclose a magnetic ring channel.
  • the innermost metal ring 41 is fixed to the feeding pipe 31.
  • the axial section of the induction magnetic ring 4 is in the shape of a shuttle, and the height of the metal ring 41 is getting higher and higher from the outer ring to the inner ring, and the area is getting larger and larger, which can make the outer ring metal ring closer to the washing barrel wall easier It reaches the magnetic saturation state, and does not form a magnetic field barrier to the inner metal ring, which is conducive to the uniform distribution of the magnetic field, so that the magnetic field forms a magnetic curtain in the area of the induction magnetic ring 4, which eliminates the magnetic medium and rich conjoined bodies and single The body concentrate escaped from the weak magnetic area to the tailings, resulting in runaway.
  • the overflow device 2 includes an overflow sleeve 22 and an overflow inner cylinder 21 arranged inside the overflow sleeve 22.
  • the lower end of the overflow inner cylinder 21 passes through the top of the washing cylinder 1.
  • the flange and the fastening bolt 15 realize a tight and sealed connection, and the overflow inner cylinder 21 and the washing cylinder 1 have the same diameter.
  • the overflow inner cylinder 21 is sleeved with an inclined circular bottom plate 23, the overflow sleeve 22 is vertically arranged along the outer eaves of the circular bottom plate 23, and the lower end of the circular bottom plate 23 is provided with a vertical overflow sleeve 22
  • the upper plane of the overflow sleeve 22 is horizontal and 50-200 mm higher than the upper plane of the overflow inner cylinder 21, and the two planes are in a parallel relationship with each other.
  • the overflow inner cylinder 21 and the washing drum 1 have the same diameter, so that the flow velocity in the washing drum 1 and the overflow inner drum 21 are the same, which solves the problem of ore running or nesting.
  • the ore feeding device 3 includes: a ore pipe 31, a support arm 32 is fixed on the outer periphery of the upper end of the ore pipe 31, and the outer end of the support arm 32 is connected to the overflow device 2
  • the top of the overflow casing 22 is welded and fixed to seal the bottom of the ore pipe 31.
  • a plurality of ore pipes 34 connected to the inner cavity are fixed on the outer periphery of the lower end of the ore pipe 31.
  • the outlet of the ore pipe 34 is located in the washing
  • the axial position inside the cylinder 1 coincides with the middle position between the first traveling wave magnetic field coil 9a and the second traveling wave magnetic field coil 9b.
  • the ore outlet of the ore distribution pipe 34 is located at the radial position inside the washing drum 1 in the middle of the distance between the inner wall of the washing drum 1 and the outer wall of the ore feeding pipe 31.
  • the ore outlets of the multiple ore distribution pipes 34 are arranged along the tangential direction.
  • the ore distribution pipe 34 includes a radial section 341 and a tangential section 342 connected to the outer end of the radial section 341.
  • the other end of the tangential section 342 is the outlet, and the inner end of the radial section 341 is connected to the feeding pipe.
  • the outer periphery of the lower end of 31 is fixedly connected and communicates with its inner cavity.
  • the radial section 341 of the ore distribution pipe 34 is arranged obliquely downward relative to the ore supply pipe 31. This arrangement ensures that there is a component of force in the direction of gravity and the ore is smoothly discharged.
  • the top opening of the ore pipe 31 is convenient for maintenance and cleaning, and the ore can also be fed through the top opening. It is also possible to fix the ore inlet pipe 33 communicating with the inner cavity on the outer periphery of the upper end of the ore feeding pipe 31, and the ore inlet pipe 33 realizes the side feeding of the ore pipe 31.
  • the water supply device includes: a water jacket 7 ring placed on the upper end of the outer wall of the concentrate cone 5, the water jacket 7 is composed of an upper circular plate 71, a lower circular plate 72 and the middle tube
  • the vertical plate 73 is sealed and welded together, and the water inlet pipe 74 is horizontally arranged along the tangent direction of the inner wall of the vertical plate 73;
  • the upper circular plate 71 and the bottommost traveling wave magnetic field coil are provided with insulation whose outer circle is slightly smaller than the upper circular plate 71 Plate 8;
  • the upper end of the inner wall of the concentrate cone 5 is provided with a plurality of uniformly distributed jet tubes 6 communicating with the inner cavity of the water jacket 7, and the jet tubes 6 are close to the bottom of the washing tube 1.
  • the water outlet direction of the jet pipe 6 is arranged tangentially, which is consistent with the ore outlet direction of the ore distribution pipe 34 of the ore feeding device 3.
  • the jet pipe 6 can be provided with one layer or two or more layers up and down according to the water supply volume.
  • Each layer includes a plurality of jet pipes 6; the jet pipes 6 of adjacent layers are preferably staggered to ensure The water supply is even.
  • the multiple magnetic field coils of the magnetic separation device are fed with low-frequency alternating current, and the traveling wave magnetic field coil 9 adopts the "Y" or " ⁇ " connection method, corresponding to the mine magnetic field coil 11
  • An induction magnetic ring 4 is arranged inside the washing drum 1; a plurality of ore distribution pipes 34 are arranged on the outer periphery of the lower end of the ore feeding pipe 31 of the ore feeding device 3, and the axial position of the ore outlet of the ore distribution pipe 34 corresponds to the first traveling wave magnetic field
  • the middle position between the coil 9a and the second traveling wave magnetic field coil 9b is the same, the radial position of the ore outlet is at the middle of the distance between the inner wall of the washing drum 1 and the outer wall of the feeding pipe 31, and the ore distribution position and method are reasonable;
  • the overflow inner tube 21 of the overflow device 2 and the washing drum 1 have the same diameter, which solves the problem of ore running or nesting; its water supply device is

Abstract

A low-frequency alternating-current electromagnetic elutriating machine, comprising: a washing separator (1), a concentrate cone (5), an overflow device (2), an ore feeding device (3), a water supply device, and a magnetic separation device. The magnetic separation device comprises ore gathering magnetic field coils (11) sleeved on the top of the outer periphery of the washing separator (1) and a plurality of traveling-wave magnetic field coils (9) located below the ore gathering magnetic field coils (11). Single-phase low-frequency alternating-current is fed into the ore gathering magnetic field coils (11), and three-phase low-frequency alternating-current is fed into the traveling-wave magnetic field coils (9). The traveling-wave magnetic field coils (9) are connected in "Y" or "△" shape. The frequency of the low-frequency alternating-current is lower than 50 Hz. Inductive magnetic rings (4) are provided at the positions corresponding to the ore gathering magnetic field coils (11) inside the washing separator (1). An inner overflow cylinder (21) has the same diameter as the washing separator (1). The ore outlet of the ore feeding device (3) is located at the middle between first and second traveling-wave magnetic field coils (9a, 9b) and the middle of between the inner wall of the washing separator (1) and the outer wall of an ore feeding pipe (31). A water supply device is provided in the concentrate cone (5) below the washing separator (1). The low-frequency alternating-current electromagnetic elutriating machine can achieve a high concentrate grade and good sorting effect, and has a wide range of application.

Description

低频交流电磁淘洗机Low frequency AC electromagnetic washing machine
本申请要求于2019年03月15日提交中国专利局的申请号为201910198699.X、发明名称为“低频交流电磁淘洗机”,以及申请号为201920331116.1、发明名称为“低频交流电磁淘洗机”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application requires that the application number be 201910198699.X, the invention name is "low frequency AC electromagnetic elutriation machine", the application number is 201920331116.1, and the invention name is "low frequency AC electromagnetic elutriation machine" submitted to the China Patent Office on March 15, 2019 "The priority of the Chinese patent application, the entire content of which is incorporated into this application by reference.
技术领域Technical field
本发明涉及磁选设备技术领域,具体涉及低频交流电磁淘洗机。The invention relates to the technical field of magnetic separation equipment, in particular to a low-frequency alternating current electromagnetic elutriation machine.
背景技术Background technique
目前,国内的磁选矿厂普遍采用筒式磁选机、磁力脱泥槽等磁选设备。这类设备的磁场强度较高,磁场力较大,对磁铁矿的选别有强大的磁团聚作用。因此存在“磁性夹杂”和“非磁性夹杂”等先天劣势,使得精矿中含有较多的脉石,严重影响精矿品位。另外,该类磁选设备工艺流程长且复杂,中矿循环量过大,水资源消耗高,选矿成本居高不下。与当下的提质增效,节能降耗的绿色矿山理念相悖。为了解决常规磁选设备的磁性和非磁性夹杂,采用经济有效的选矿手段获得高品位磁铁矿精矿或超纯磁铁矿精矿,为此,各研制单位做了大量的工作,如增加筒式磁选机的极数,提高精矿粉的翻滚次数,适当降低精矿端的磁场强度,在卸矿端弱磁区加冲洗水、加装震动装置、脉动磁场及旋转磁场磁选机等,但上述种种办法,均对提高精矿品位收效甚微,因此,开发一种提质增效,节能环保的磁选设备成为当前的首要任务。At present, domestic magnetic separation plants generally use magnetic separation equipment such as cylindrical magnetic separators and magnetic desilting tanks. The magnetic field strength of this type of equipment is relatively high, and the magnetic field force is relatively large, which has a strong magnetic agglomeration effect on the separation of magnetite. Therefore, there are inherent disadvantages such as "magnetic inclusions" and "non-magnetic inclusions", which make the concentrate contain more gangue, which seriously affects the grade of the concentrate. In addition, the process flow of this type of magnetic separation equipment is long and complicated, the medium ore circulation is too large, the water consumption is high, and the beneficiation cost remains high. It is contrary to the current green mining concept of improving quality and efficiency, saving energy and reducing consumption. In order to solve the magnetic and non-magnetic inclusions of conventional magnetic separation equipment, cost-effective beneficiation methods are used to obtain high-grade magnetite concentrate or ultra-pure magnetite concentrate. To this end, various research and development units have done a lot of work, such as increasing The number of poles of the cylindrical magnetic separator increases the number of tumbling of the concentrate powder, and appropriately reduces the magnetic field strength at the concentrate end. Add flushing water to the weak magnetic area of the unloading end, install vibration devices, pulsating magnetic field and rotating magnetic field magnetic separator, etc. However, the above-mentioned methods have little effect on improving the grade of concentrate. Therefore, the development of a magnetic separation equipment that improves quality and efficiency, energy saving and environmental protection has become the current primary task.
当前,传统电磁淘洗机普遍采用大于洗选筒直径的溢流堰,增大直径的溢流堰在降低尾矿内精矿量的同时,由于口径变大,流速下降,极易造成非磁性矿物悬停或下沉,使得非磁性尾矿排出不畅,造成筒内洗选环境持续恶化,严重影响精矿品位,加大水流又极易增快洗选筒内的水流速度,使得相当一部分微细粒精矿随水流升至洗选桶与溢流堰的结合处,稍大粒度的精矿悬停此处,在给矿或给水波动偏大时,悬浮区的精矿被排进尾矿,跑矿严重,造成资源的浪费。在给矿或给水波动偏小时,悬浮区的非磁性 尾矿沉入洗选筒内,使筒内的淘洗环境被破坏,造成精矿品位不稳定,影响产品品质;缩小直径的溢流堰只是在溢流口的位置提高了水流速度,致使溢流口与筒体结合部以下的洗选筒内的区域压差很小,上升水流速度放缓,导致精矿与非磁性矿分离不彻底,无法达到理想选别效果。At present, traditional electromagnetic elutriation machines generally use overflow weirs larger than the diameter of the washing drum. An overflow weir with an enlarged diameter reduces the amount of concentrate in the tailings. At the same time, due to the larger diameter, the flow rate decreases, which is very easy to cause non-magnetic The hovering or sinking of minerals makes the discharge of non-magnetic tailings unsmooth, causing the continuous deterioration of the washing environment in the drum, which seriously affects the grade of the concentrate. Increasing the water flow can easily increase the water flow speed in the washing drum, making a considerable part The fine-grained concentrate rises with the water flow to the junction of the washing bucket and the overflow weir. The slightly larger-grained concentrate hangs here. When the ore or water supply fluctuates greatly, the concentrate in the suspension area is discharged into the tailings , The mine runs seriously, causing a waste of resources. When the fluctuation of the ore or water supply is too small, the non-magnetic tailings in the suspension area sink into the washing drum, which destroys the washing environment in the drum, resulting in unstable concentrate grade and affecting product quality; overflow weir with reduced diameter Only the position of the overflow port increases the water flow speed, resulting in a small pressure difference in the washing cylinder below the junction of the overflow port and the cylinder body, and the rising water flow rate slows down, resulting in incomplete separation of concentrate and non-magnetic ore , Unable to achieve the desired sorting effect.
此外,传统电磁淘洗机普遍采用过长的给矿管,使得出矿口位于第三和第四脉动励磁线圈持平的筒体的中心位置,导致上部的第一、第二线圈起不到作用,由于过长的给矿管,使矿浆的沉降距离缩短,翻滚次数减少,降低了精矿品位。为了提高精矿品位,加大用水量,提高水流速度,精矿品位有所提升的同时跑矿严重,并浪费大量的水资源。即使第一脉动磁场线圈的上部安装有恒定磁场的线圈,由于该线圈的恒定磁场特性所限,仅对筒壁附近的精矿有吸附作用。该恒定磁场线圈,由于直流供电电源的属性问题,只具备吸附功能,在精矿粉被吸附后,不具备翻滚的能力,因此,内部夹杂无法被挤出,当被吸附的矿粉达到一定量时,部分矿粉脱离磁场约束,坠入洗选筒,由于不具备翻滚、搓洗功能,铁粉内部的非磁性夹杂也一同坠入洗选筒内,对筒内稳定的选别环境造成破坏,导致产出的精矿品位不稳定。同时,沿筒壁至筒内中心位置的磁场逐步递减,使得筒内部分区域成为无磁区和弱磁区,对于该区域,在水流偏大时是无法利用磁场吸附住随水流上升的微细粒精矿的,因此,该恒定磁场线圈在稳定的分选环境下作用微乎其微,在水流或矿浆量波动偏大时,又起不到决定性的控矿作用,造成跑矿。给矿管的下端沿圆周方向均布有布矿口,此布矿方式是以与洗选筒轴线重合的方式进矿,在矿浆抵达给矿管底部时又以垂直于轴线的方向经各均布的布矿口流入至上升水流中,由于布矿口距内筒壁较远,磁场对该处矿浆约束力弱,在此区域基本形不成磁链,产生不了磁翻滚效果,又因为沉降距离过短,因此,不合理的布矿位置、方式及过长的给矿管造成沉降距离过短是影响精矿品位优劣的关键因素之一。In addition, traditional electromagnetic washing machines generally use too long feeding pipes, so that the outlet is located at the center of the cylinder where the third and fourth pulsating excitation coils are flat, causing the first and second coils on the upper part to fail to function. , Due to the long feed pipe, the settlement distance of the slurry is shortened, the number of tumbling is reduced, and the concentrate grade is reduced. In order to improve the grade of the concentrate, increase the water consumption, and increase the water flow speed, the grade of the concentrate has been improved while the mine runs seriously and wastes a lot of water resources. Even if a constant magnetic field coil is installed on the upper part of the first pulsating magnetic field coil, due to the limitation of the constant magnetic field characteristics of the coil, it only has an adsorption effect on the concentrate near the cylinder wall. The constant magnetic field coil, due to the nature of the DC power supply, only has an adsorption function. After the concentrate is adsorbed, it does not have the ability to roll. Therefore, the internal inclusions cannot be squeezed out. When the adsorbed mineral powder reaches a certain amount At this time, part of the mineral powder escapes the restriction of the magnetic field and falls into the washing drum. Because it does not have the functions of tumbling and scrubbing, the non-magnetic inclusions inside the iron powder also fall into the washing drum, causing damage to the stable sorting environment in the drum. The resulting concentrate grade is unstable. At the same time, the magnetic field gradually decreases along the cylinder wall to the center of the cylinder, making some areas in the cylinder become non-magnetic and weak magnetic areas. For this area, when the water flow is too large, the magnetic field cannot be used to absorb the fine-grained concentrate that rises with the water flow. Therefore, the constant magnetic field coil has little effect in a stable sorting environment. When the water flow or the amount of slurry fluctuates greatly, it cannot play a decisive role in controlling ore, resulting in ore running. The lower end of the feed pipe is evenly distributed along the circumferential direction with ore outlets. The ore distribution method is to feed the ore in a way that coincides with the axis of the washing drum. When the pulp reaches the bottom of the feed pipe, it passes through the holes in a direction perpendicular to the axis. The cloth hole flows into the rising water flow. Because the cloth hole is far away from the inner cylinder wall, the magnetic field has weak binding force on the slurry. In this area, the magnetic link is basically not formed, and the magnetic tumbling effect cannot be produced. Because the settlement distance is too long Therefore, the unreasonable location and method of ore distribution and the too short settlement distance for the ore pipe are one of the key factors affecting the quality of the concentrate.
其次,传统电磁淘洗机的进水口均布在洗选筒下部的水平圆周上,直接在水平圆周上开孔,使进入筒内的水流呈无序状态,导致沉降至此的精矿再次被扰动打散,对富集精矿造成极大的破坏作用,即使进水口下部设置有恒定磁场的富集拢矿线圈,对于处在洗选筒中心的精矿粉也难以吸附,起不到好的富集作用。因此,在此位置设置进水口及设置进水口的方式均 不合适;还有的厂家将给水口设置在第四、第五线圈的水平区域,由洗选筒外部将水管接入筒内垂直于洗选筒轴线处,再接一根与洗选筒轴线重合的进水管至第四、第五线圈的水平区域,将进水管顶部堵塞,在进水管上部圆周上水平均布有分水管,在每根分水管的同侧水平面上均布有若干出水口,使水流呈上升螺旋状态,由于精矿进入这一区域时品位已达到理想状态,正是富集拢矿的关键阶段,经上升螺旋水流扰动,将初步富集的精矿粉再次打散,不利于拢矿。并且,在这一区域布水破坏筒内自上而下渐进式改善水质条件的规律,呈现出一种给水区域水质最优、下部区域次之、顶部区域最差,导致处理好的精矿面临再次污染的问题。Secondly, the water inlets of the traditional electromagnetic washing machine are evenly distributed on the horizontal circumference of the lower part of the washing drum, and holes are directly opened on the horizontal circumference, so that the water flow into the drum is in a disordered state, causing the concentrate that settles here to be disturbed again Dispersion will cause great damage to the concentrated concentrate. Even if the concentrated ore coil with a constant magnetic field is installed at the lower part of the water inlet, it is difficult to absorb the concentrate powder in the center of the washing drum, and it will not work well. Enrichment. Therefore, it is not appropriate to set the water inlet at this position and the way to set the water inlet; some manufacturers set the water inlet in the horizontal area of the fourth and fifth coils, and the water pipe is connected to the tube from the outside of the washing tube and perpendicular to the tube. At the axis of the washing drum, connect a water inlet pipe that coincides with the axis of the washing drum to the horizontal area of the fourth and fifth coils, block the top of the water inlet pipe, and evenly distribute water dividers on the upper circumference of the water inlet pipe. There are several water outlets on the same horizontal surface of each water distribution pipe, so that the water flow is in an ascending spiral state. Since the grade of the concentrate has reached the ideal state when the concentrate enters this area, it is the key stage of enriching the ore. Disturbance of the water flow will break up the initially enriched fine ore powder again, which is not conducive to ore gathering. In addition, in this area, the law of gradually improving the water quality conditions from top to bottom in the water distribution damage tube in this area shows that the water quality in the water supply area is the best, the lower area is the second, and the top area is the worst. The problem of pollution again.
并且,传统电磁淘洗机的电源采用直流电励磁,并通过可控硅交替通电,使线圈间产生交替的脉动磁场,比如,1、3、5线圈同时通电时,位于此处的精矿粉形成磁链,处在固定磁场中的精矿粉仅形成磁链,精矿粒间相对不动,无法搓洗和析出内部的非磁性夹杂物,断电时,磁链消失,精矿粉继续下沉,一部分微细粒精矿粉在无磁场吸附的情况下随上升水流与中、细粒级的非磁性物排进尾矿。2、4、6线圈通电时,精矿粉粒由上一磁场周期中的状态旋转180°,再次形成磁链,两组线圈的通电间隔因选别环境不同而间隔时间不同,大致范围在1-6秒之间,周而复始实现磁翻滚效果的同时,间隔的无磁空窗期也造成大量的微细粒精矿粉被抛至尾矿,造成大量资源的浪费。In addition, the power supply of the traditional electromagnetic washing machine adopts direct current excitation, and the thyristor is alternately energized to generate alternating pulsating magnetic fields between the coils. For example, when coils 1, 3, and 5 are energized at the same time, the concentrated ore powder located here is formed Magnetic chain, the concentrate powder in a fixed magnetic field only forms a magnetic chain, and the concentrate particles are relatively immobile, unable to scrub and precipitate the internal non-magnetic inclusions. When the power is off, the magnetic chain disappears and the concentrate continues to sink. , Part of the fine-grained concentrate powder is discharged into the tailings along with the rising water flow and medium and fine-grained non-magnetic materials without magnetic adsorption. When coils 2, 4, and 6 are energized, the concentrate particles will rotate 180° from the state in the previous magnetic field cycle to form a magnetic link again. The energization interval of the two coils is different due to the different selection environments, and the approximate range is 1 Between -6 seconds, while the magnetic tumbling effect is realized over and over again, the interval of the non-magnetic empty window also causes a large amount of fine-grained concentrate powder to be thrown to the tailings, resulting in a lot of waste of resources.
此外,由于地表、地下,地域不同,导致矿石性质存在差异,因此,存在易选矿与难选矿之分。对于矿石性质的差异,各选矿厂的侧重点也有所不同。在精矿品位已设定的前提下,易选矿尽最大可能的控尾,控制跑矿。难选矿尽最大可能的提精。由于矿石性质的差异,造成了选矿的侧重点不同,不同的侧重点,导致淘洗机必须具备大的磁场调节范围和与之匹配的翻滚次数与搓洗功能,然而,传统直流电磁淘洗机的磁场调节范围窄,不具备搓洗功能,不能满足差异巨大的矿石选别要求,导致选矿指标无法满足客户要求。In addition, due to the difference in the surface, underground, and geographic areas, the properties of the ore are different. Therefore, there is a distinction between easy beneficiation and difficult beneficiation. Regarding the difference in the nature of the ore, the focus of each concentrator is also different. Under the premise that the concentrate grade has been set, easy beneficiation tries its best to control tails and run ore. Refractory minerals are refined as much as possible. Due to the difference in the nature of the ore, the focus of the beneficiation is different, and the different focus causes the washing machine to have a large magnetic field adjustment range and matching tumbling times and scrubbing functions. However, the traditional DC electromagnetic washing machine The magnetic field has a narrow adjustment range, does not have the scrubbing function, and cannot meet the different requirements for ore separation, resulting in the beneficiation index unable to meet customer requirements.
发明内容Summary of the invention
有鉴于此,本发明所要解决的技术问题是:提供一种精矿品位高、分选效果好的低频交流电磁淘洗机。In view of this, the technical problem to be solved by the present invention is to provide a low frequency AC electromagnetic washing machine with high concentrate grade and good sorting effect.
为解决上述技术问题,本发明的技术方案是:低频交流电磁淘洗机,包括:洗选筒,所述洗选筒底部设置有精矿锥筒,所述洗选筒顶部设置有溢流装置,所述溢流装置安装有伸入所述洗选筒内部的给矿装置,所述洗选筒外部设置有向所述洗选筒内部供水的供水装置,所述洗选筒的外周设置有磁选装置,所述磁选装置包括套设于所述洗选筒外周并且沿所述洗选筒轴向间隔设置的多个磁场线圈,所述磁场线圈通入低频交流电。In order to solve the above technical problems, the technical solution of the present invention is: a low-frequency AC electromagnetic elutriation machine, including: a washing drum, the bottom of the washing drum is provided with a concentrate cone, and the top of the washing drum is provided with an overflow device , The overflow device is installed with a ore supply device extending into the inside of the washing drum, a water supply device for supplying water to the inside of the washing drum is provided outside the washing drum, and the outer periphery of the washing drum is provided The magnetic separation device includes a plurality of magnetic field coils sleeved on the outer circumference of the washing cylinder and spaced along the axial direction of the washing cylinder, and the magnetic field coils are fed with low-frequency alternating current.
以下是本发明低频交流电磁淘洗机的多项进一步改进之处:The following are several further improvements of the low-frequency AC electromagnetic washing machine of the present invention:
其中,所述磁场线圈包括位于顶部的拢矿磁场线圈和位于所述拢矿磁场线圈下方的若干个行波磁场线圈。Wherein, the magnetic field coil includes a mining magnetic field coil located at the top and a plurality of traveling wave magnetic field coils located below the mining magnetic field coil.
其中,所述拢矿磁场线圈通入单相低频交流电,若干个所述行波磁场线圈通入三相低频交流电。Wherein, the mine magnetic field coil is supplied with single-phase low-frequency alternating current, and several of the traveling wave magnetic field coils are supplied with three-phase low-frequency alternating current.
其中,所述三相低频交流电的频率低于50Hz,所述单相低频交流电的频率低于50Hz。Wherein, the frequency of the three-phase low-frequency alternating current is lower than 50 Hz, and the frequency of the single-phase low-frequency alternating current is lower than 50 Hz.
其中,进一步地,所述三相低频交流电的频率范围在0.1-20Hz,所述单相低频交流电的频率范围在0.1-20Hz。Wherein, further, the frequency range of the three-phase low-frequency alternating current is 0.1-20 Hz, and the frequency range of the single-phase low-frequency alternating current is 0.1-20 Hz.
其中,若干个所述行波磁场线圈的接线方式为“Y”形接法,或者“△”形接法。Wherein, the connection mode of the several traveling wave magnetic field coils is a "Y" connection method or a "△" connection method.
其中,所述磁选装置还包括:感应磁环,所述感应磁环设置于所述洗选筒内部,并且与所述拢矿磁场线圈的位置对应。Wherein, the magnetic separation device further includes: an inductive magnetic ring, the inductive magnetic ring is arranged inside the washing barrel and corresponds to the position of the ore gathering magnetic field coil.
其中,所述感应磁环包括:套在一起并且同心设置的多个金属环,相邻的金属环之间留有间隔,所述间隔处设置有固定连接相邻金属环的加强筋,相邻所述金属环、所述加强筋共同围成磁环通道。Wherein, the inductive magnetic ring includes: a plurality of metal rings sleeved together and arranged concentrically, with spaces between adjacent metal rings, and reinforcing ribs fixedly connecting the adjacent metal rings are arranged at the spaces, The metal ring and the reinforcing rib jointly enclose a magnetic ring channel.
其中,最内层的所述金属环与所述给矿装置固定。Wherein, the innermost metal ring is fixed to the ore feeding device.
其中,所述感应磁环的轴向剖面呈梭形。Wherein, the axial cross section of the induction magnetic ring is in the shape of a shuttle.
其中,所述感应磁环采用高导磁材料制成。Wherein, the induction magnetic ring is made of high magnetic permeability material.
其中,所述溢流装置包括溢流套管和设置于所述溢流套管内部的溢流内筒,所述溢流内筒的下端与所述洗选筒的顶部固定连接,所述溢流内筒与所述洗选筒等径。Wherein, the overflow device includes an overflow sleeve and an overflow inner cylinder arranged inside the overflow sleeve. The lower end of the overflow inner cylinder is fixedly connected to the top of the washing cylinder, and the overflow The flow inner tube is the same diameter as the washing tube.
其中,所述给矿装置包括:给矿管,所述给矿管的上端外周固定有支撑臂,所述支撑臂的外端与所述溢流装置的顶部固定,所述给矿管的底部封口,所述给矿管的下端外周固定有与其内腔相连通的多个布矿管,所述布矿管的出矿口位于所述洗选筒内部的轴向位置与自上向下数第二、第三磁场线圈之间的中部位置一致。Wherein, the ore feeding device includes: a ore feeding pipe, a support arm is fixed on the outer periphery of the upper end of the ore feeding pipe, the outer end of the support arm is fixed to the top of the overflow device, and the bottom of the ore feeding pipe Sealing, the outer periphery of the lower end of the ore feeding pipe is fixed with a plurality of ore distribution pipes communicating with the inner cavity, and the ore outlet of the ore distribution pipe is located in the axial position inside the washing drum and counted from top to bottom. The middle positions of the second and third magnetic field coils are the same.
其中,所述布矿管的出矿口位于所述洗选筒内部的径向位置在所述洗选筒内壁至所述给矿管外壁之间距离的中部处。Wherein, the radial position of the ore outlet of the ore distribution pipe inside the washing drum is at the middle of the distance between the inner wall of the washing drum and the outer wall of the ore feeding pipe.
其中,多个所述布矿管的出矿口沿切线方向布置。Wherein, the ore outlets of the multiple ore distribution pipes are arranged along the tangential direction.
其中,所述布矿管包括径向段和与所述径向段的外端连接的切向段,所述切向段的另一端为所述出矿口,所述径向段的里端与所述给矿管的下端外周固定连接并且与其内腔相连通。Wherein, the ore distribution pipe includes a radial section and a tangential section connected to the outer end of the radial section, the other end of the tangential section is the mine outlet, and the inner end of the radial section It is fixedly connected with the outer periphery of the lower end of the feeding pipe and communicates with the inner cavity.
其中,所述布矿管的所述径向段相对于所述给矿管向下倾斜设置。Wherein, the radial section of the ore distribution pipe is inclined downwardly relative to the ore supply pipe.
其中,所述给矿管的上端外周固定有与其内腔相连通的进矿管。Wherein, the outer periphery of the upper end of the feeding pipe is fixed with an inlet pipe communicating with the inner cavity.
其中,所述给矿管的顶部敞口。Wherein, the top of the feeding pipe is open.
其中,所述供水装置包括:环置于所述精矿锥筒外壁上端的水套,所述精矿锥筒内壁上端设置有与所述水套内腔相连通的多个射流管。Wherein, the water supply device includes: a water jacket ring placed on the upper end of the outer wall of the concentrate cone, and the upper end of the inner wall of the concentrate cone is provided with a plurality of jet pipes communicating with the inner cavity of the water jacket.
其中,所述射流管的出水方向呈切向布置,并且与所述给矿装置的出矿方向一致。Wherein, the water outlet direction of the jet pipe is arranged tangentially and is consistent with the mine outlet direction of the ore feeding device.
其中,所述射流管设置有一层,或者上下地设置有两层或两层以上,每一层皆包括多个所述射流管;相邻层的所述射流管位置交错。Wherein, the jet tube is provided with one layer, or two or more layers are arranged up and down, and each layer includes a plurality of the jet tubes; the positions of the jet tubes in adjacent layers are staggered.
采用了上述技术方案后,本发明的有益效果如下:After adopting the above technical scheme, the beneficial effects of the present invention are as follows:
由于本发明低频交流电磁淘洗机的磁场线圈通入的是低频交流电,磁场线圈通电时,处在交变磁场中的精矿粉不仅形成磁链,而且精矿粒间能够相对运动,具有翻转、搓洗功能,从而析出内部的非磁性夹杂物,提高了精矿品位,分选效果好;同时,相比于直流电交替通电方式,采用低频交流供电方式励磁,不存在无磁空窗期,避免了大量微细粒精矿粉被抛至尾矿,避免了资源浪费。Because the magnetic field coil of the low-frequency AC electromagnetic washing machine of the present invention is fed with low-frequency alternating current, when the magnetic field coil is energized, the concentrate powder in the alternating magnetic field not only forms a magnetic chain, but also the concentrate particles can move relative to each other, with flipping , Scrubbing function, so as to separate out the internal non-magnetic inclusions, improve the grade of the concentrate, and the sorting effect is good; at the same time, compared with the alternating current mode of direct current, it adopts low-frequency AC power supply for excitation, and there is no non-magnetic empty window period. A large amount of fine-grained concentrate powder is thrown into the tailings, avoiding resource waste.
由于洗选筒内部与拢矿磁场线圈对应的位置设置有感应磁环,拢矿磁场线圈通电后,磁场感应在洗选筒内部的感应磁环上,提高了给矿装置外壁周围的磁场力,解决了因水流或矿浆波动偏大,造成沿给矿装置外壁跑 矿的问题。同时,具有周期性的低频交流电通入拢矿磁场线圈,使得吸附在感应磁环上的精矿粉在被感应磁环吸附的同时,还兼具周期性地磁翻滚,加之精矿粉间的相互摩擦、搓洗,使夹杂在精矿粉内的非磁性矿不断挤出,被上升水流带出,随着给水、给矿趋于平稳,吸附在感应磁环上的精矿粉越吸越多,达到一定量时,部分精矿粉重新沉入洗选筒内,由于低频交流励磁磁场特性的关系,吸附在感应磁环上的精矿粉具有磁翻滚、摩擦、搓洗功能,使得坠入洗选筒的矿粉失去了非磁性夹杂的条件,因此,对筒内稳定的选别环境不会造成破坏,使得精矿品位更加稳定。Since the inside of the washing drum is equipped with an induction magnetic ring at the position corresponding to the mine magnetic field coil, after the mine magnetic field coil is energized, the magnetic field is induced on the induction magnetic ring inside the washing drum, which improves the magnetic force around the outer wall of the mine feeding device. It solves the problem of ore running along the outer wall of the mine feeding device due to large fluctuations of water flow or slurry. At the same time, a periodic low-frequency alternating current is passed into the ore magnetic field coil, so that the concentrate powder adsorbed on the induction magnetic ring is adsorbed by the induction magnetic ring, and it also has periodic magnetic tumbling. Rubbing and scrubbing with each other makes the non-magnetic ore contained in the concentrate powder continue to be squeezed out and taken out by the rising water flow. As the water supply and the ore supply become stable, the concentrate powder adsorbed on the induction magnetic ring attracts more and more When reaching a certain amount, part of the concentrate powder re-sinks into the washing drum. Due to the characteristics of the low-frequency AC excitation magnetic field, the concentrate powder adsorbed on the induction magnetic ring has the functions of magnetic tumbling, friction and scrubbing, making it fall into the washing machine. The mineral powder of the sorting drum loses the condition of non-magnetic inclusion, therefore, it will not cause damage to the stable sorting environment in the drum, making the concentrate grade more stable.
由于感应磁环的轴向剖面呈梭形,金属环的高度自外圈至内圈越来越高,面积越来越大,能够使靠近洗选筒壁的外圈金属环更容易达到磁饱和状态,并且不会对内圈金属环形成磁场阻挡,此种结构有利于磁场的均布,使得磁场在感应磁环这一区域形成磁幕,杜绝了具有磁性的中、富连生体及单体精矿由弱磁区逃逸至尾矿,造成跑矿。Since the axial section of the induction magnetic ring is in the shape of a shuttle, the height of the metal ring from the outer ring to the inner ring is getting higher and larger, and the area is getting larger and larger, which can make the outer ring metal ring near the wall of the washing cylinder easier to reach magnetic saturation This structure is conducive to the uniform distribution of the magnetic field, so that the magnetic field forms a magnetic screen in the area of the induction magnetic ring, which eliminates the magnetic medium and rich conjoined bodies and monomers. The concentrate escaped from the weak magnetic area to the tailings, causing runaway.
由于低频交流电的频率低于工频交流电的频率50Hz,磁选过程中,使得精矿粒在某一翻转状态下有足够的时间摆至足够的摆幅,为彻底析出内部的非磁性夹杂物创造了有利条件。对于不同的矿石属性,可通过调频达到想要的翻滚次数及搓洗次数,从而更加有效可控的提高精矿品位及精矿产量。Because the frequency of low-frequency alternating current is lower than the frequency of power frequency alternating current 50Hz, during the magnetic separation process, the concentrate particles have enough time to swing to a sufficient swing in a certain flip state, creating a complete precipitation of internal non-magnetic inclusions. Advantageous conditions. For different ore properties, the frequency can be adjusted to achieve the desired number of tumbling and scrubbing, so as to more effectively and controllably increase the concentrate grade and concentrate output.
由于行波磁场线圈的接线方式为“Y”形接法,或者“△”形接法;“Y”形接法可以使行波磁场线圈获得高励磁电流和高磁场强度,满足中、高磁场选矿的要求;“△”形接法可以使行波磁场线圈获得低励磁电流和低磁场强度,满足弱磁场选矿的要求;应用灵活,适用范围广,能满足差异巨大的矿石选别要求。Because the wiring method of the traveling wave magnetic field coil is "Y" connection method or "△" connection method; the "Y" connection method can make the traveling wave magnetic field coil obtain high excitation current and high magnetic field strength to meet the requirements of medium and high magnetic fields. Mining requirements: The "△" type connection method can make the traveling wave magnetic field coil obtain low excitation current and low magnetic field strength to meet the requirements of weak magnetic field beneficiation; it is flexible in application and has a wide range of applications, which can meet the different requirements of ore beneficiation.
由于溢流内筒与洗选筒等径,使得洗选筒和溢流内筒内的流速一致,解决了跑矿或窝矿的问题。Since the overflow inner tube and the washing tube have the same diameter, the flow velocity in the washing tube and the overflow inner tube are consistent, which solves the problem of ore running or nesting.
由于给矿管下端外周多个布矿管的出矿口位于洗选筒内部的轴向位置与自上向下数第二、第三磁场线圈之间的中部位置一致,与现有技术相比,拉长了矿粉的沉降距离和磁选路径,延长了磁选时间,提高了精矿品位。由于布矿管的出矿口位于洗选筒内部的径向位置在洗选筒内壁至给矿管外壁之间距离的中部处,距离洗选筒内壁近,使得行波磁场能更加有效地干 预选矿,精矿与贫、弱连生体及单体非磁性矿快速的相背而行,加速分离,提高了精矿品位。由于多个布矿管的出矿口沿切线方向布置,与上升的旋转水流同步,下沉的精矿粉与上升水流互为阻力,防止精矿粉下沉速度过快,加长了磁选时间,提高了精矿品位。Because the axial position of the multiple ore outlets on the outer periphery of the lower end of the ore feeding pipe in the washing cylinder is consistent with the middle position between the second and third magnetic field coils from the top to the bottom, compared with the prior art , Lengthen the settling distance and magnetic separation path of ore powder, extend the time of magnetic separation, and improve the grade of concentrate. Because the ore outlet of the ore distribution tube is located in the inner wall of the washing drum, the radial position is in the middle of the distance between the inner wall of the washing drum and the outer wall of the feeding tube, and is close to the inner wall of the washing drum, so that the traveling wave magnetic field can interfere more effectively. In beneficiation, the concentrate quickly goes against the lean, weak conjoined and monomeric non-magnetic ore, accelerating the separation and improving the grade of the concentrate. Because the outlets of the multiple ore pipes are arranged in the tangential direction, synchronized with the rising rotating water flow, the sinking concentrate powder and the rising water flow are resistance to each other, preventing the concentrate powder from sinking too fast and lengthening the magnetic separation time , Improve the grade of concentrate.
由于精矿锥筒内壁上端设置有与精矿锥筒外壁上端的水套内腔相连通的多个射流管,相比于现有技术,供水装置设置于洗选筒下方的精矿锥筒,降低了供水装置的位置,避免进入洗选筒内的水流呈无序状态,从而不会扰动打散沉降至洗选筒下部的精矿,避免对富集精矿造成破坏作用,确保精矿顺利富集至精矿锥筒。由于射流管的出水方向呈切向布置,并且与布矿管的出矿方向一致,Since the upper end of the inner wall of the concentrate cone is provided with a plurality of jet pipes communicating with the water jacket cavity on the upper end of the outer wall of the concentrate cone, compared with the prior art, the water supply device is arranged in the concentrate cone below the washing tube. The position of the water supply device is lowered to avoid the disordered state of the water flow entering the washing drum, so as not to disturb the concentrate that settles down to the lower part of the washing drum, so as to avoid damaging the concentrated concentrate and ensure the smooth concentrate Concentrate to the concentrate cone. Since the water outlet direction of the jet tube is arranged in a tangential direction and is consistent with the outlet direction of the ore cloth tube,
通入水时,射入精矿锥筒内的水流在锥筒内形成旋转水流,随着脉动翻滚的精矿粉持续进入精矿锥筒内的旋转水流,由于水与精矿粉密度差的原因,精矿粉受到较大的离心力,精矿粉随水流持续向精矿锥筒内壁移动,最终精矿粉沿着位于射流管背面的精矿锥筒内壁滑进精矿阀,排进精矿池。When water is introduced, the water flow injected into the concentrate cone forms a rotating water flow in the cone. The concentrate powder tumbling with the pulse continues to enter the rotating water flow in the concentrate cone due to the difference in density between the water and the concentrate powder. , The concentrate powder is subjected to a large centrifugal force, and the concentrate powder continues to move to the inner wall of the concentrate cone with the water flow, and finally the concentrate powder slides into the concentrate valve along the inner wall of the concentrate cone at the back of the jet tube, and is discharged into the concentrate Pool.
综上所述,本发明的低频交流电磁淘洗机,其磁选装置的多个磁场线圈通入低频交流电,行波磁场线圈采用“Y”形接法或者“△”形接法,对应拢矿磁场线圈位置在洗选筒内部设置感应磁环;其给矿装置的给矿管下端外周设置多个布矿管,多个布矿管的出矿口轴向位置与自上向下数第二、第三磁场线圈之间的中部位置一致,出矿口径向位置在洗选筒内壁至给矿管外壁之间距离的中部处;其溢流装置的溢流内筒与洗选筒等径;其供水装置设置于洗选筒下方的精矿锥筒;本发明的低频交流电磁淘洗机在上升水流和磁场线圈通入低频交流电作用下,实现了精矿粉沉降、接链、翻滚、摩擦、搓洗除杂,最终通过旋转水流富集、浓缩,实现了高品位选矿,并且选矿适应范围广。In summary, in the low-frequency AC electromagnetic washing machine of the present invention, the multiple magnetic field coils of the magnetic separation device are fed with low-frequency alternating current, and the traveling wave magnetic field coil adopts the "Y"-shaped connection method or the "△"-shaped connection method, correspondingly The position of the mine magnetic field coil is provided with an induction magnetic ring inside the washing drum; the outer periphery of the lower end of the feeding pipe of the ore feeding device is provided with multiple ore distribution pipes. The axial positions of the ore outlet of the multiple ore distribution pipes are counted from top to bottom 2. The middle position between the third magnetic field coils is the same, and the radial position of the outlet is at the middle of the distance between the inner wall of the washing tube and the outer wall of the feeding tube; the overflow inner tube of the overflow device has the same diameter as the washing tube The water supply device is arranged under the concentrate cone under the washing drum; the low-frequency AC electromagnetic washing machine of the present invention realizes the sedimentation, chain connection, tumbling of the concentrate powder under the action of the rising water flow and the magnetic field coil passing low-frequency alternating current Friction, scrubbing and impurity removal, and finally enrichment and concentration by rotating water stream, high-grade beneficiation is realized, and the beneficiation has a wide range of applications.
附图说明Description of the drawings
为了更清楚地说明本发明实施例,下面将对实施例或现有技术描述中所需要使用的附图做简单介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动 的前提下,还可以根据这些附图获得其他的附图。In order to explain the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.
图1是本发明实施例的低频交流电磁淘洗机结构剖视主视图;Figure 1 is a front view of the structure of a low-frequency AC electromagnetic elutriation machine according to an embodiment of the present invention;
图2是图1的俯视图;Figure 2 is a top view of Figure 1;
图3是图1中感应磁环的俯视图;Figure 3 is a top view of the induction magnetic ring in Figure 1;
图4是图3中A-A剖视图;Figure 4 is a sectional view of A-A in Figure 3;
图5是图1中给矿装置的主视图;Figure 5 is a front view of the ore feeding device in Figure 1;
图6是图5中B-B剖视图;Figure 6 is a cross-sectional view of B-B in Figure 5;
图7是图1中精矿锥筒的剖视主视图;Figure 7 is a sectional front view of the concentrate cone in Figure 1;
图8是图7的俯视图;Figure 8 is a top view of Figure 7;
图9是图1中的行波磁场线圈“Y”形接线图;Figure 9 is a "Y"-shaped wiring diagram of the traveling wave magnetic field coil in Figure 1;
图10是图9的电路示意图;Figure 10 is a schematic diagram of the circuit of Figure 9;
图11是图1中的行波磁场线圈“△”形接线图;Figure 11 is a "△"-shaped wiring diagram of the traveling wave magnetic field coil in Figure 1;
图12是图11电路示意图;Figure 12 is a schematic diagram of the circuit of Figure 11;
图中:1-洗选筒;2-溢流装置;21-溢流内筒;22-溢流套管;23-圆形底板;24-尾矿口;3-给矿装置;31-给矿管;32-支撑臂;33-进矿管;34-布矿管;341-径向段;342-切向段;4-感应磁环;41-金属环;42-加强筋;5-精矿锥筒;51-精矿口;52-阀门;6-射流管;7-水套;71-上圆板;72-下圆板;73-立板;74-进水管;8-绝缘板;9-行波磁场线圈;9a-第一行波磁场线圈;9b-第二行波磁场线圈;9c-第三行波磁场线圈;9d-第四行波磁场线圈;9e-第五行波磁场线圈;9f-第六行波磁场线圈;10-云母纸;11-拢矿磁场线圈;12-非导磁金属板;13-防护罩;14-接线盒;15-紧固螺栓。In the picture: 1-washing drum; 2-overflow device; 21-overflow inner tube; 22-overflow sleeve; 23-round bottom plate; 24-tailings mouth; 3-feeding device; 31-feeding Mine pipe; 32-support arm; 33-inlet pipe; 34-laying pipe; 341-radial section; 342-tangential section; 4-induction magnetic ring; 41-metal ring; 42-reinforcing rib; 5- Concentrate cone; 51-concentrate port; 52-valve; 6-jet tube; 7-water jacket; 71-upper round plate; 72-lower round plate; 73-rise plate; 74-inlet pipe; 8-insulation Plate; 9-traveling wave magnetic field coil; 9a-first traveling wave magnetic field coil; 9b-second traveling wave magnetic field coil; 9c-third traveling wave magnetic field coil; 9d-fourth traveling wave magnetic field coil; 9e-fifth traveling wave Magnetic field coil; 9f-sixth traveling wave magnetic field coil; 10-mica paper; 11-mine magnetic field coil; 12-non-magnetic metal plate; 13-protective cover; 14-junction box; 15-fastening bolt.
具体实施方式detailed description
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
如图1和图2所示,本发明的低频交流电磁淘洗机,包括:洗选筒1, 洗选筒1底部焊接固定有精矿锥筒5,精矿锥筒5的下端设置有精矿口51,精矿口51处安装有调节排矿的阀门52;洗选筒1顶部设置有溢流装置2;溢流装置2上安装有伸入洗选筒1内部的给矿装置3;洗选筒1外部设置有向洗选筒1内部供水的供水装置;洗选筒1的外周设置有磁选装置,磁选装置包括套设于洗选筒1外周并且沿洗选筒1轴向通过绝缘板8间隔设置的多个磁场线圈,磁场线圈呈圆环状,其内圈贴近洗选筒1外壁区域,并且设置有筒状的云母纸10做绝缘体,磁场线圈包括位于顶部的拢矿磁场线圈11和位于拢矿磁场线圈11下方的行波磁场线圈9,拢矿磁场线圈11上部设置有绝缘板8,绝缘板8的上部设置有压紧线圈的非导磁金属板12,非导磁金属板12的外圆与下述水套7的上圆板71外圆相同,紧固后的行波磁场线圈9与拢矿磁场线圈11在非导磁金属板12与上圆板71之间套装有圆筒状的防护罩13,避免矿浆及水对行波磁场线圈9与拢矿磁场线圈11造成损害,防护罩13外固定有接线盒14,磁场线圈与接线盒14连接通入低频交流电。As shown in Figures 1 and 2, the low-frequency AC electromagnetic elutriation machine of the present invention includes: a washing drum 1, a concentrate cone 5 is welded and fixed at the bottom of the washing drum 1, and a concentrate cone 5 is provided at the lower end of the concentrate cone 5. A valve 52 for adjusting the discharge of ore is installed at the mine mouth 51 and the concentrate mouth 51; an overflow device 2 is installed on the top of the washing drum 1; the overflow device 2 is installed with a ore feeding device 3 extending into the washing drum 1; A water supply device for supplying water to the inside of the washing drum 1 is arranged outside the washing drum 1; a magnetic separation device is arranged on the outer periphery of the washing drum 1, and the magnetic separation device includes sleeves on the outer circumference of the washing drum 1 and along the axial direction of the washing drum 1. A plurality of magnetic field coils are arranged at intervals by the insulating plate 8. The magnetic field coil is in the shape of an annular shape, and its inner ring is close to the outer wall area of the washing cylinder 1, and a cylindrical mica paper 10 is provided as an insulator. The magnetic field coil includes a ore on the top The magnetic field coil 11 and the traveling wave magnetic field coil 9 located below the magnetic field coil 11 are provided with an insulating plate 8 on the upper part of the magnetic field coil 11, and a non-magnetic metal plate 12 for pressing the coil is provided on the upper part of the insulating plate 8. The outer circle of the magnetic metal plate 12 is the same as the outer circle of the upper circular plate 71 of the water jacket 7 described below. The fastened traveling wave magnetic field coil 9 and the mining magnetic field coil 11 are located between the non-magnetic metal plate 12 and the upper circular plate 71 A cylindrical protective cover 13 is set in the room to prevent the ore pulp and water from damaging the traveling wave magnetic field coil 9 and the mine magnetic field coil 11. A junction box 14 is fixed outside the protective cover 13, and the magnetic field coil is connected to the junction box 14 for low frequency Alternating current.
如图9至图12所示,其中,行波磁场线圈9包括若干个等距均布的线圈,自上向下依次标识为第一行波磁场线圈9a、第二行波磁场线圈9b、第三行波磁场线圈9c、第四行波磁场线圈9d、第五行波磁场线圈9e、第六行波磁场线圈9f。As shown in Figures 9 to 12, the traveling wave magnetic field coil 9 includes several equally spaced and evenly distributed coils, which are sequentially identified as the first traveling wave magnetic field coil 9a, the second traveling wave magnetic field coil 9b, and the second traveling wave magnetic field coil from top to bottom. The three traveling wave magnetic field coil 9c, the fourth traveling wave magnetic field coil 9d, the fifth traveling wave magnetic field coil 9e, and the sixth traveling wave magnetic field coil 9f.
其中,行波磁场线圈9通入三相低频交流电,拢矿磁场线圈11通入单相低频交流电。并且,三相低频交流电的频率低于50Hz,单相低频交流电的频率低于50Hz,即皆低于工频交流电的频率。优选三相低频交流电的频率范围在0.1-20Hz,单相低频交流电的频率范围在0.1-20Hz。Among them, the traveling wave magnetic field coil 9 is connected to a three-phase low-frequency alternating current, and the mining magnetic field coil 11 is connected to a single-phase low-frequency alternating current. In addition, the frequency of three-phase low-frequency alternating current is lower than 50 Hz, and the frequency of single-phase low-frequency alternating current is lower than 50 Hz, that is, both are lower than the frequency of power frequency alternating current. Preferably, the frequency range of the three-phase low-frequency alternating current is 0.1-20 Hz, and the frequency range of the single-phase low-frequency alternating current is 0.1-20 Hz.
如图9和图10所示,其中,若干个行波磁场线圈的接线方式为“Y”形接法,即:第一行波磁场线圈9a与第四行波磁场线圈9d串接,一端连接相线U,另一端接至公共节点;第二行波磁场线圈9b与第五行波磁场线圈9e串接,一端连接相线V,另一端接至公共节点;第三行波磁场线圈9c与第六行波磁场线圈9f串接,一端连接相线W,另一端接至公共节点。采用“Y”形接法,可以使行波磁场线圈获得高励磁电流和高磁场强度,满足中、高磁场选矿的要求。As shown in Figures 9 and 10, the wiring of several traveling wave magnetic field coils is a "Y" connection, that is: the first traveling wave magnetic field coil 9a and the fourth traveling wave magnetic field coil 9d are connected in series, and one end is connected The other end of the phase line U is connected to the common node; the second traveling wave magnetic field coil 9b is connected in series with the fifth traveling wave magnetic field coil 9e, one end is connected to the phase line V, and the other end is connected to the common node; the third traveling wave magnetic field coil 9c is connected to the first The six traveling wave magnetic field coils 9f are connected in series, one end is connected to the phase line W, and the other end is connected to the common node. Using the "Y" connection method, the traveling wave magnetic field coil can obtain high excitation current and high magnetic field strength to meet the requirements of medium and high magnetic field beneficiation.
如图11和图12所示,其中,若干个行波磁场线圈的接线方式还可以 采用“△”形接法,即:第一行波磁场线圈9a、第二行波磁场线圈9b、第三行波磁场线圈9c、第四行波磁场线圈9d、第五行波磁场线圈9e、第六行波磁场线圈9f首位连接,第一行波磁场线圈9a与第六行波磁场线圈9f的节点连接相线W,第二行波磁场线圈9b与第三行波磁场线圈9c的节点连接相线U,第四行波磁场线圈9d与第五行波磁场线圈9e的节点连接相线V。采用“△”形接法,可以使行波磁场线圈获得低励磁电流和低磁场强度,满足弱磁场选矿的要求。As shown in Fig. 11 and Fig. 12, the wiring of several traveling wave magnetic field coils can also adopt the "△" connection method, namely: the first traveling wave magnetic field coil 9a, the second traveling wave magnetic field coil 9b, and the third The traveling wave magnetic field coil 9c, the fourth traveling wave magnetic field coil 9d, the fifth traveling wave magnetic field coil 9e, and the sixth traveling wave magnetic field coil 9f are first connected, and the nodes of the first traveling wave magnetic field coil 9a and the sixth traveling wave magnetic field coil 9f are connected to each other. Line W, the node of the second traveling wave magnetic field coil 9b and the third traveling wave magnetic field coil 9c is connected to the phase line U, and the node of the fourth traveling wave magnetic field coil 9d and the fifth traveling wave magnetic field coil 9e is connected to the phase line V. With the "△" connection method, the traveling wave magnetic field coil can obtain low excitation current and low magnetic field strength to meet the requirements of weak magnetic field beneficiation.
如图1所示,其中,磁选装置还包括:设置于洗选筒1内部并且由高导磁材料制成的感应磁环4,例如电工纯铁或Q235A材质,感应磁环4套装在下述给矿装置3的给矿管31上,并且与拢矿磁场线圈11的位置对应。最好方式是,感应磁环4的水平轴线与拢矿磁场线圈11的水平轴线重合。As shown in Figure 1, the magnetic separation device further includes: an induction magnetic ring 4 arranged inside the washing cylinder 1 and made of high magnetic permeability material, such as electrical pure iron or Q235A material, the induction magnetic ring 4 is set in the following The ore feeding pipe 31 of the ore feeding device 3 corresponds to the position of the ore collecting magnetic field coil 11. The best way is that the horizontal axis of the induction magnetic ring 4 coincides with the horizontal axis of the mine magnetic field coil 11.
如图3和图4所示,其中,感应磁环4包括:套在一起并且同心设置的多个金属环41,相邻的金属环41之间留有间隔,间隔处设置有焊接连接相邻金属环41的加强筋42,相邻的金属环41、相邻的加强筋42之间共同围成磁环通道。其中,最内层的金属环41与给矿管31固定。As shown in Figures 3 and 4, the induction magnetic ring 4 includes: a plurality of metal rings 41 sleeved together and arranged concentrically, with spaces between adjacent metal rings 41, and welded connections are arranged at the spaces to connect adjacent The reinforcing ribs 42 of the metal ring 41, the adjacent metal rings 41 and the adjacent reinforcing ribs 42 jointly enclose a magnetic ring channel. Among them, the innermost metal ring 41 is fixed to the feeding pipe 31.
其中,感应磁环4的轴向剖面呈梭形,金属环41的高度自外圈至内圈越来越高,面积越来越大,能够使靠近洗选筒壁的外圈金属环更容易达到磁饱和状态,并且不会对内圈金属环形成磁场阻挡,有利于磁场的均布,使得磁场在感应磁环4这一区域形成磁幕,杜绝了具有磁性的中、富连生体及单体精矿由弱磁区逃逸至尾矿,造成跑矿。Among them, the axial section of the induction magnetic ring 4 is in the shape of a shuttle, and the height of the metal ring 41 is getting higher and higher from the outer ring to the inner ring, and the area is getting larger and larger, which can make the outer ring metal ring closer to the washing barrel wall easier It reaches the magnetic saturation state, and does not form a magnetic field barrier to the inner metal ring, which is conducive to the uniform distribution of the magnetic field, so that the magnetic field forms a magnetic curtain in the area of the induction magnetic ring 4, which eliminates the magnetic medium and rich conjoined bodies and single The body concentrate escaped from the weak magnetic area to the tailings, resulting in runaway.
如图1所示,其中,溢流装置2包括溢流套管22和设置于溢流套管22内部的溢流内筒21,溢流内筒21的下端与洗选筒1的顶部通过法兰及紧固螺栓15实现紧固密封连接,溢流内筒21与洗选筒1等直径。溢流内筒21上套装有倾斜设置的圆形底板23,溢流套管22沿圆形底板23外檐垂直设置,在圆形底板23的低端位置设置有与溢流套管22垂直的尾矿口24,溢流套管22的上平面呈水平状态,且高于溢流内筒21的上平面50-200毫米,两平面互为平行关系。溢流内筒21与洗选筒1等直径,使得洗选筒1和溢流内筒21内的流速一致,解决了跑矿或窝矿问题。As shown in Figure 1, the overflow device 2 includes an overflow sleeve 22 and an overflow inner cylinder 21 arranged inside the overflow sleeve 22. The lower end of the overflow inner cylinder 21 passes through the top of the washing cylinder 1. The flange and the fastening bolt 15 realize a tight and sealed connection, and the overflow inner cylinder 21 and the washing cylinder 1 have the same diameter. The overflow inner cylinder 21 is sleeved with an inclined circular bottom plate 23, the overflow sleeve 22 is vertically arranged along the outer eaves of the circular bottom plate 23, and the lower end of the circular bottom plate 23 is provided with a vertical overflow sleeve 22 For the tailings port 24, the upper plane of the overflow sleeve 22 is horizontal and 50-200 mm higher than the upper plane of the overflow inner cylinder 21, and the two planes are in a parallel relationship with each other. The overflow inner cylinder 21 and the washing drum 1 have the same diameter, so that the flow velocity in the washing drum 1 and the overflow inner drum 21 are the same, which solves the problem of ore running or nesting.
如图1、图5和图6所示,其中,给矿装置3包括:给矿管31,给矿管31的上端外周固定有支撑臂32,支撑臂32的外端与溢流装置2的溢流 套管22顶部焊接固定,给矿管31的底部封口,给矿管31的下端外周固定有与其内腔相连通的多个布矿管34,布矿管34的出矿口位于洗选筒1内部的轴向位置与第一行波磁场线圈9a、第二行波磁场线圈9b之间的中部位置一致。其中,布矿管34的出矿口位于洗选筒1内部的径向位置在洗选筒1内壁至给矿管31外壁之间距离的中部处。As shown in Figure 1, Figure 5 and Figure 6, wherein the ore feeding device 3 includes: a ore pipe 31, a support arm 32 is fixed on the outer periphery of the upper end of the ore pipe 31, and the outer end of the support arm 32 is connected to the overflow device 2 The top of the overflow casing 22 is welded and fixed to seal the bottom of the ore pipe 31. A plurality of ore pipes 34 connected to the inner cavity are fixed on the outer periphery of the lower end of the ore pipe 31. The outlet of the ore pipe 34 is located in the washing The axial position inside the cylinder 1 coincides with the middle position between the first traveling wave magnetic field coil 9a and the second traveling wave magnetic field coil 9b. Wherein, the ore outlet of the ore distribution pipe 34 is located at the radial position inside the washing drum 1 in the middle of the distance between the inner wall of the washing drum 1 and the outer wall of the ore feeding pipe 31.
其中,多个布矿管34的出矿口沿切线方向布置。其中,布矿管34包括径向段341和与径向段341的外端连接的切向段342,切向段342的另一端为出矿口,径向段341的里端与给矿管31的下端外周固定连接并且与其内腔相连通。Among them, the ore outlets of the multiple ore distribution pipes 34 are arranged along the tangential direction. Wherein, the ore distribution pipe 34 includes a radial section 341 and a tangential section 342 connected to the outer end of the radial section 341. The other end of the tangential section 342 is the outlet, and the inner end of the radial section 341 is connected to the feeding pipe. The outer periphery of the lower end of 31 is fixedly connected and communicates with its inner cavity.
其中,布矿管34的径向段341相对于给矿管31向下倾斜设置,此种设置方式确保有重力方向的分力,出矿顺畅。Wherein, the radial section 341 of the ore distribution pipe 34 is arranged obliquely downward relative to the ore supply pipe 31. This arrangement ensures that there is a component of force in the direction of gravity and the ore is smoothly discharged.
其中,给矿管31的顶部敞口,便于维修清矿,也可以通过该顶部敞口处给矿。还可以在给矿管31的上端外周固定设置与其内腔相连通的进矿管33,通过进矿管33实现给矿管31的侧部给矿。Among them, the top opening of the ore pipe 31 is convenient for maintenance and cleaning, and the ore can also be fed through the top opening. It is also possible to fix the ore inlet pipe 33 communicating with the inner cavity on the outer periphery of the upper end of the ore feeding pipe 31, and the ore inlet pipe 33 realizes the side feeding of the ore pipe 31.
如图1、图7和图8所示,其中,供水装置包括:环置于精矿锥筒5外壁上端的水套7,水套7由上圆板71、下圆板72及中间的筒状立板73密封焊合而成,沿立板73内壁切线方向水平设置有进水管74;上圆板71与最底部的行波磁场线圈之间设置有外圆略小于上圆板71的绝缘板8;精矿锥筒5内壁上端设置有与水套7内腔相连通的多个均布的射流管6,射流管6靠近洗选筒1的底部。As shown in Figure 1, Figure 7 and Figure 8, the water supply device includes: a water jacket 7 ring placed on the upper end of the outer wall of the concentrate cone 5, the water jacket 7 is composed of an upper circular plate 71, a lower circular plate 72 and the middle tube The vertical plate 73 is sealed and welded together, and the water inlet pipe 74 is horizontally arranged along the tangent direction of the inner wall of the vertical plate 73; the upper circular plate 71 and the bottommost traveling wave magnetic field coil are provided with insulation whose outer circle is slightly smaller than the upper circular plate 71 Plate 8; the upper end of the inner wall of the concentrate cone 5 is provided with a plurality of uniformly distributed jet tubes 6 communicating with the inner cavity of the water jacket 7, and the jet tubes 6 are close to the bottom of the washing tube 1.
其中,射流管6的出水方向呈切向布置,与给矿装置3的布矿管34的出矿方向一致。Wherein, the water outlet direction of the jet pipe 6 is arranged tangentially, which is consistent with the ore outlet direction of the ore distribution pipe 34 of the ore feeding device 3.
其中,射流管6根据供水量的需要可以设置一层,或者上下地设置两层或两层以上,每一层皆包括多个射流管6;相邻层的射流管6最好位置交错,确保供水均匀。Among them, the jet pipe 6 can be provided with one layer or two or more layers up and down according to the water supply volume. Each layer includes a plurality of jet pipes 6; the jet pipes 6 of adjacent layers are preferably staggered to ensure The water supply is even.
本发明的低频交流电磁淘洗机,其磁选装置的多个磁场线圈通入低频交流电,行波磁场线圈9采用“Y”形接法或者“△”形接法,对应拢矿磁场线圈11在洗选筒1内部设置感应磁环4;其给矿装置3的给矿管31下端外周设置有多个布矿管34,布矿管34的出矿口轴向位置与第一行波磁场线圈9a、第二行波磁场线圈9b之间的中部位置一致,出矿口径向位 置在洗选筒1内壁至给矿管31外壁之间距离的中部处,布矿位置及布矿方式合理;其溢流装置2的溢流内筒21与洗选筒1等直径,解决了跑矿或窝矿问题;其供水装置设置于洗选筒1下方的精矿锥筒5,降低了供水装置的位置,不会扰动打散沉降至洗选筒1下部的精矿,确保精矿顺利富集至精矿锥筒5;本发明的低频交流电磁淘洗机在上升水流和磁场线圈通入低频交流电作用下,实现了精矿粉沉降、接链、翻滚、摩擦、搓洗除杂,最终通过旋转水流富集、浓缩,实现了高品位选矿,并且选矿适应范围广。In the low-frequency alternating current electromagnetic washing machine of the present invention, the multiple magnetic field coils of the magnetic separation device are fed with low-frequency alternating current, and the traveling wave magnetic field coil 9 adopts the "Y" or "△" connection method, corresponding to the mine magnetic field coil 11 An induction magnetic ring 4 is arranged inside the washing drum 1; a plurality of ore distribution pipes 34 are arranged on the outer periphery of the lower end of the ore feeding pipe 31 of the ore feeding device 3, and the axial position of the ore outlet of the ore distribution pipe 34 corresponds to the first traveling wave magnetic field The middle position between the coil 9a and the second traveling wave magnetic field coil 9b is the same, the radial position of the ore outlet is at the middle of the distance between the inner wall of the washing drum 1 and the outer wall of the feeding pipe 31, and the ore distribution position and method are reasonable; The overflow inner tube 21 of the overflow device 2 and the washing drum 1 have the same diameter, which solves the problem of ore running or nesting; its water supply device is set at the concentrate cone 5 below the washing drum 1, reducing the water supply device Position, it will not disturb the concentrate that has settled down to the lower part of the washing drum 1 to ensure that the concentrate is smoothly enriched to the concentrate cone 5; the low-frequency AC electromagnetic washing machine of the present invention is connected to the low-frequency AC in the rising water flow and the magnetic field coil Under the action, the concentrated ore powder is settled, chained, rolled, rubbed, scrubbed and removed, and finally concentrated and concentrated by rotating water flow, high-grade beneficiation is realized, and the beneficiation has a wide range of applications.
对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this document, but should conform to the widest scope consistent with the principles and novel features disclosed in this document.

Claims (10)

  1. 低频交流电磁淘洗机,包括:洗选筒,所述洗选筒底部设置有精矿锥筒,所述洗选筒顶部设置有溢流装置,所述溢流装置安装有伸入所述洗选筒内部的给矿装置,所述洗选筒外部设置有向所述洗选筒内部供水的供水装置,所述洗选筒的外周设置有磁选装置,所述磁选装置包括套设于所述洗选筒外周并且沿所述洗选筒轴向间隔设置的多个磁场线圈,其特征在于,所述磁场线圈通入低频交流电。The low-frequency AC electromagnetic elutriation machine includes: a washing drum, a concentrate cone is arranged at the bottom of the washing drum, an overflow device is arranged on the top of the washing drum, and the overflow device is installed to extend into the washing The ore supply device inside the washing drum, the outside of the washing drum is provided with a water supply device for supplying water to the inside of the washing drum, the outer periphery of the washing drum is provided with a magnetic separation device, the magnetic separation device includes A plurality of magnetic field coils arranged on the outer periphery of the washing cylinder and spaced along the axial direction of the washing cylinder are characterized in that the magnetic field coils are supplied with low-frequency alternating current.
  2. 如权利要求1所述的低频交流电磁淘洗机,其特征在于,所述磁场线圈包括位于顶部的拢矿磁场线圈和位于所述拢矿磁场线圈下方的若干个行波磁场线圈;所述拢矿磁场线圈通入单相低频交流电,若干个所述行波磁场线圈通入三相低频交流电。The low-frequency AC electromagnetic washing machine according to claim 1, wherein the magnetic field coil includes a ore ore magnetic field coil at the top and a plurality of traveling wave magnetic field coils located below the ore magnetic field coil; The mine magnetic field coil is supplied with single-phase low-frequency alternating current, and several of the traveling wave magnetic field coils are supplied with three-phase low-frequency alternating current.
  3. 如权利要求2所述的低频交流电磁淘洗机,其特征在于,所述三相低频交流电的频率低于50Hz,所述单相低频交流电的频率低于50Hz。The low-frequency alternating current electromagnetic washing machine according to claim 2, wherein the frequency of the three-phase low-frequency alternating current is lower than 50 Hz, and the frequency of the single-phase low-frequency alternating current is lower than 50 Hz.
  4. 如权利要求3所述的低频交流电磁淘洗机,其特征在于,所述三相低频交流电的频率范围在0.1-20Hz,所述单相低频交流电的频率范围在0.1-20Hz。The low-frequency alternating current electromagnetic washing machine according to claim 3, wherein the frequency range of the three-phase low-frequency alternating current is 0.1-20 Hz, and the frequency range of the single-phase low-frequency alternating current is 0.1-20 Hz.
  5. 如权利要求2所述的低频交流电磁淘洗机,其特征在于,若干个所述行波磁场线圈的接线方式为“Y”形接法,或者“△”形接法。The low-frequency alternating current electromagnetic washing machine according to claim 2, characterized in that the connection mode of the plurality of traveling wave magnetic field coils is a "Y" connection method or a "△" connection method.
  6. 如权利要求2所述的低频交流电磁淘洗机,其特征在于,所述磁选装置还包括:感应磁环,所述感应磁环设置于所述洗选筒内部,并且与所述拢矿磁场线圈的位置对应;The low-frequency AC electromagnetic washing machine according to claim 2, wherein the magnetic separation device further comprises: an induction magnetic ring, the induction magnetic ring is arranged inside the washing drum and is in contact with the ore gathering The position of the magnetic field coil corresponds;
    所述感应磁环包括:套在一起并且同心设置的多个金属环,相邻的金属环之间留有间隔,所述间隔处设置有固定连接相邻金属环的加强筋,相邻所述金属环、所述加强筋共同围成磁环通道;最内层的所述金属环与所述给矿装置固定;The induction magnetic ring includes: a plurality of metal rings sleeved together and arranged concentrically, with spaces between adjacent metal rings, and reinforcing ribs fixedly connecting the adjacent metal rings are arranged at the spaces, and the adjacent metal rings The metal ring and the reinforcing ribs jointly enclose a magnetic ring channel; the innermost metal ring is fixed to the ore feeding device;
    所述感应磁环的轴向剖面呈梭形;The axial section of the induction magnetic ring is in the shape of a shuttle;
    所述感应磁环采用高导磁材料制成。The induction magnetic ring is made of high magnetic permeability material.
  7. 如权利要求1所述的低频交流电磁淘洗机,其特征在于,所述溢流装置包括溢流套管和设置于所述溢流套管内部的溢流内筒,所述溢流内筒的下端与所述洗选筒的顶部固定连接,所述溢流内筒与所述洗选筒等径。The low-frequency AC electromagnetic washing machine according to claim 1, wherein the overflow device comprises an overflow sleeve and an overflow inner cylinder arranged inside the overflow sleeve, the overflow inner cylinder The lower end of is fixedly connected with the top of the washing cylinder, and the overflow inner cylinder is the same diameter as the washing cylinder.
  8. 如权利要求1所述的低频交流电磁淘洗机,其特征在于,所述给矿装置包括:给矿管,所述给矿管的上端外周固定有支撑臂,所述支撑臂的外端与所述溢流装置的顶部固定,所述给矿管的底部封口,所述给矿管的下端外周固定有与其内腔相连通的多个布矿管,所述布矿管的出矿口位于所述洗选筒内部的轴向位置与自上向下数第二、第三磁场线圈之间的中部位置一致;The low-frequency AC electromagnetic washing machine according to claim 1, wherein the ore feeding device comprises a ore feeding pipe, a support arm is fixed on the outer periphery of the upper end of the ore feeding pipe, and the outer end of the support arm is connected to The top of the overflow device is fixed, the bottom of the ore feeding pipe is sealed, and the outer periphery of the lower end of the ore feeding pipe is fixed with a plurality of ore pipes communicating with the inner cavity, and the outlet of the ore pipe is located The axial position inside the washing cylinder is consistent with the middle position between the second and third magnetic field coils from the top to the bottom;
    所述布矿管的出矿口位于所述洗选筒内部的径向位置在所述洗选筒内壁至所述给矿管外壁之间距离的中部处;The radial position of the ore outlet of the ore distribution pipe inside the washing drum is in the middle of the distance between the inner wall of the washing drum and the outer wall of the ore feeding pipe;
    多个所述布矿管的出矿口沿切线方向布置。The ore outlets of the multiple ore distribution pipes are arranged along the tangential direction.
  9. 如权利要求8所述的低频交流电磁淘洗机,其特征在于,所述布矿管包括径向段和与所述径向段的外端连接的切向段,所述切向段的另一端为所述出矿口,所述径向段的里端与所述给矿管的下端外周固定连接并且与其内腔相连通;所述布矿管的所述径向段相对于所述给矿管向下倾斜设置;The low-frequency AC electromagnetic washing machine according to claim 8, wherein the ore distribution pipe includes a radial section and a tangential section connected with the outer end of the radial section, and the other One end is the ore outlet, the inner end of the radial section is fixedly connected to the outer periphery of the lower end of the ore pipe and communicates with its inner cavity; the radial section of the ore distribution pipe is relative to the The ore pipe is set downwardly;
    所述给矿管的上端外周固定有与其内腔相连通的进矿管;所述给矿管的顶部敞口。The outer periphery of the upper end of the ore feeding pipe is fixed with an ore inlet pipe communicating with the inner cavity; the top of the ore feeding pipe is open.
  10. 如权利要求1所述的低频交流电磁淘洗机,其特征在于,所述供水装置包括:环置于所述精矿锥筒外壁上端的水套,所述精矿锥筒内壁上端设置有与所述水套内腔相连通的多个射流管;The low-frequency AC electromagnetic washing machine according to claim 1, wherein the water supply device comprises: a water jacket ring placed on the upper end of the outer wall of the concentrate cone, and the inner wall of the concentrate cone is provided with A plurality of jet tubes communicating with the inner cavity of the water jacket;
    所述射流管的出水方向呈切向布置,并且与所述给矿装置的出矿方向一致;The water outlet direction of the jet pipe is arranged tangentially and is consistent with the mine outlet direction of the ore feeding device;
    所述射流管设置有一层,或者上下地设置有两层或两层以上,每一层皆包括多个所述射流管;相邻层的所述射流管位置交错。The jet tube is provided with one layer, or two or more layers are arranged up and down, and each layer includes a plurality of the jet tubes; the positions of the jet tubes in adjacent layers are staggered.
PCT/CN2019/084166 2019-03-15 2019-04-25 Low-frequency alternating-current electromagnetic elutriating machine WO2020186596A1 (en)

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