CN212349103U - High-frequency vibration cylinder type magnetic separator - Google Patents

High-frequency vibration cylinder type magnetic separator Download PDF

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Publication number
CN212349103U
CN212349103U CN202021616803.7U CN202021616803U CN212349103U CN 212349103 U CN212349103 U CN 212349103U CN 202021616803 U CN202021616803 U CN 202021616803U CN 212349103 U CN212349103 U CN 212349103U
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magnetic
arc
vibration
frequency
box body
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吴中贤
赵通林
郭思瑶
董红卫
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University of Science and Technology Liaoning USTL
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University of Science and Technology Liaoning USTL
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Abstract

The utility model relates to a high-frequency vibration drum type magnetic separator, which comprises a frame, a magnetic roller, a rotating motor, a separation box body, a vibration arc-shaped medium, a high-frequency vibration motor, a feeding chute, a concentrate discharging flushing nozzle, a dispersing flushing nozzle I and a dispersing flushing nozzle II; the high-frequency vibration motor is fixed on the vibration arc-shaped medium, and under the action of the high-frequency vibration motor, the vibration arc-shaped medium performs high-frequency shearing motion with an elliptical composite track in the arc-shaped channel along the horizontal direction; the utility model discloses be fit for the fine grain mineral to select separately, have the magnetic agglomeration of weakening, improve separation efficiency, avoid complete machine vibration, characteristics such as the noise is little, energy-conservation.

Description

High-frequency vibration cylinder type magnetic separator
Technical Field
The utility model relates to a strong magnetism fine grain mineral magnetic separation technical field especially relates to a high-frequency vibration section of thick bamboo formula magnet separator.
Background
As a large iron ore resource country, the proven iron ore resource reserves in China reach 714 hundred million tons. Although the total amount is large, along with continuous mining, the properties of the ore gradually approach to the characteristics of low grade, fine embedded granularity, complex structure and construction of the ore and the like. Under the background, the dominance of the ultra-lean fine magnetite is increasingly prominent, the average iron grade of the mineral is only about 20%, and 90% of monomer dissociation degree can be obtained only by grinding the mineral to be less than 30 mu m. Due to the defects of the prior art and equipment, the high-efficiency magnetic separation of the ultra-lean fine magnetite has become a difficult problem.
When fine mineral particles are separated by a traditional cylindrical magnetic separator, due to the super-strong magnetic agglomeration effect, the mineral particles are accelerated to deposit and the gangue minerals are wrapped, so that the problems of low magnetic separation efficiency, low concentrate iron grade and the like are caused. Aiming at the defects, some enterprises make some innovative improvements on the basis of the traditional drum magnetic separator.
The utility model discloses a chinese utility model patent that the bulletin number is CN 209501943U discloses "an impulse type magnet separator", it includes the cell body, can be relative cell body pivoted mode installation cylinder in the cell body, install the magnetism system with the static mode of relative cell body in the cylinder, leave the clearance between the below of cylinder and the cell body, be equipped with the baffle in the clearance and fall into the magnetic separation district that is close to the cylinder with the clearance, middle separation material district and the district of advancing of keeping away from the cylinder, the top of advancing the mining district is equipped with into the ore deposit mouth and installs the inlet tube, the bottom in separation material district is equipped with the non-magnetism thing export and stretches out the bottom of cell body, and the top in magnetic separation district is equipped with the export of during operation magnetism thing and installs the flushing pipe, the bottom of cell body still is equipped with. During operation, the ore pulp is pulsed under the action of the vibrating device, the particles are in a suspension state, the magnetic substances are timely adsorbed on the surface of the roller, and the magnetic substances are more easily separated. The core of the technical scheme is that the mineral particles are fully dispersed through a vibration device so as to prevent the mineral particles from depositing in a separation area, but the existence of magnetic agglomeration is still the main reason for poor separation indexes.
Chinese utility model patent with grant publication number of CN 208194661U discloses an "ultra-pure fine iron powder magnetic separator", which comprises a horizontal roller mounted on a frame, an umbrella-shaped fixing frame in clearance fit with the inner wall of the roller mounted on a fixed shaft in the roller, a magnetic block assembly with the same magnetic pole direction mounted on the arc-shaped inner wall of the umbrella-shaped fixing frame, a semicircular casing mounted on a vibration absorber on the upper end of the frame by using a suspension loop to the periphery of the lower half part of the roller, an arc-shaped sieve plate mounted between the casing and the roller, a feed inlet disposed on the casing near the front edge of the roller, a magnetic field isolation feed inlet disposed at the lower end of the feed inlet, a tailing discharge outlet disposed at the rear lower part of the casing, flushing water pipes respectively mounted at the corresponding positions of the upper part between the roller and the feed inlet and the other side of the roller, a vibration motor mounted on, a row of concentrate discharge flushing pipes are arranged above the concentrate discharge guide plate and close to the roller. When the magnetic separator works, 60% grade iron fine powder is prepared into 30% ore pulp, the ore pulp is uniformly fed from a feeding hole, the pulp enters below a sieve plate through a magnetic field isolation feeding hole, a vibrating motor drives a semicircular shell and the sieve plate to vibrate in an elliptical track, the iron fine powder in the pulp is upwards sucked under the action of magnetic block magnetic force, magnetic agglomeration is broken up when the sucked iron fine powder passes through sieve holes, the magnetic agglomeration is simultaneously washed from two sides of a roller by a washing water pipe, nonmagnetic substances are downwards discharged through the sieve holes under the impact of clear water, tailings are discharged through a discharge hole, the concentrate is adsorbed on the roller, is rotated out of a magnetic separation area, and then is washed on an unloading guide plate by an unloading washing pipe to flow out. The innovation point of the technical scheme is that the arc-shaped sieve plate is arranged between the box body and the magnetic roller, and the sorting box body and the arc-shaped sieve plate are driven to vibrate together by the vibrating motor, so that deposition of particles and elimination of magnetic aggregate are prevented, but vibration of the box body can cause vibration of the whole machine, noise pollution during working is large, and mechanical loss of the machine body is large.
Therefore, there is a need to develop a novel magnetic separation device suitable for sorting fine-particle minerals, which can obstruct particle deposition, eliminate magnetic agglomeration influence, improve sorting efficiency and eliminate resonance of the whole machine.
Disclosure of Invention
The utility model provides a high frequency vibration cylinder magnet separator is fit for the fine grain mineral and selects separately, has the magnetic agglomeration of weakening, improves and selects separately efficiency, avoids characteristics such as complete machine vibration, noise are little, energy-conservation.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a high-frequency vibration drum type magnetic separator comprises a rack, a magnetic drum, a rotating motor, a separation box body, a vibration arc-shaped medium, a high-frequency vibration motor, a feeding chute, a concentrate discharging and washing spray head, a dispersing and washing spray head I and a dispersing and washing spray head II; the sorting box body is arranged on the rack, the lower part of the magnetic roller is arranged in the sorting box body, and an arc-shaped channel is reserved between the magnetic roller and the sorting box body; the vibration arc-shaped medium is one to multiple layers and is arranged in an arc-shaped channel between the magnetic roller and the sorting box body through an elastic suspension mechanism, the high-frequency vibration motor is fixed on the vibration arc-shaped medium, and the vibration arc-shaped medium performs high-frequency shearing motion with an elliptical composite track in the arc-shaped channel along the horizontal direction under the action of the high-frequency vibration motor; the upper space of the arc-shaped channel above the vibrating arc-shaped medium is a separation area, and the lower space of the arc-shaped channel below the vibrating arc-shaped medium is an ore pulp flow channel; the magnetic roller can rotate around a horizontal axis under the drive of a rotating motor, and a section of magnetic system is arranged in the magnetic roller along the circumferential direction of the magnetic roller; relative to the rotation direction of the magnetic roller, the rear end of the separation box body is provided with a feeding chute, and the front end of the separation box body is provided with a concentrate discharging chute; a row of concentrate discharging flushing nozzles are arranged above the concentrate discharging chute and close to the magnetic roller along the axial direction of the magnetic roller; a tailing discharge port is arranged at the bottom of the separation box body corresponding to the tail end of the ore pulp runner; one end of the arc-shaped channel, which is close to the concentrate discharge chute, is provided with a row of first dispersion washing nozzles along the axial direction of the magnetic roller, and the other end of the arc-shaped channel is provided with a row of second dispersion washing nozzles along the axial direction of the magnetic roller.
The elastic suspension mechanism is composed of a plurality of hook springs, one end of each hook spring is connected with the vibration arc-shaped medium, and the other end of each hook spring is fixedly connected with the inner wall of the sorting box body.
The concentrate discharging and washing spray head, the dispersing and washing spray head I and the dispersing and washing spray head II are all high-pressure water spray heads.
The vibration arc-shaped medium is close to the magnetic roller, and the distance between the vibration arc-shaped medium and the magnetic roller is 3-5 mm.
The vibrating arc-shaped medium is a sieve plate, a screen or a net chain, and the aperture of the sieve is 1-4 mm.
The vibration arc-shaped medium is made of non-magnetic stainless steel or spring steel.
The vibration arc-shaped medium is provided with 1-3 layers.
The magnetic system of the magnetic roller is an electromagnetic magnetic system or a permanent magnetic system, the wrap angle of the magnetic system is 120 degrees, the adjustment range of the declination angle of the magnetic system is 15-20 degrees, and the magnetic field intensity is 1000-1500 Gs.
The separation box body is of a downstream structure, a counter-flow structure or a semi-counter-flow structure.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the high-frequency vibration device is arranged on the vibration arc-shaped medium and is not connected with the box body, and in the sorting process, the high-frequency vibration motor only drives the vibration arc-shaped medium to do high-frequency shearing motion in the horizontal direction, so that the load of the vibration device can be reduced, the resonance phenomenon of magnetic separation is eliminated, the noise is reduced, and the energy is saved and the consumption is reduced;
2) the vibrating arc-shaped medium is driven by the high-frequency vibrating motor to do high-frequency shearing motion in the horizontal direction, so that the turbulence intensity of ore pulp in a separation area is enhanced, and magnetic agglomeration or magnetic flux linkage is weakened and eliminated, thereby improving the separation efficiency.
Drawings
FIG. 1 is a front view of the high frequency vibration drum type magnetic separator of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3a is a schematic structural view of the sieve plate of the present invention.
Fig. 3b is a schematic structural diagram of the screen of the present invention.
Fig. 3c is a schematic structural view of the net chain of the present invention.
Fig. 4 is a graph showing a comparison of the sorting indexes in example 1 of the present invention.
Fig. 5 is a graph showing a comparison of the sorting indexes in example 2 of the present invention.
In the figure: 1. magnetic drum 2, feeding chute 3, concentrate discharging flushing nozzle 4, concentrate discharging chute 5, frame 6, high-frequency vibration motor 7, first dispersing flushing nozzle 8, second dispersing flushing nozzle 9, separation box body 10, vibration arc-shaped medium 11, tailing discharge outlet 12 and rotary motor
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1 and 2, the high-frequency vibration drum type magnetic separator of the present invention comprises a frame 5, a magnetic drum 1, a rotating electrical machine 12, a separation box 9, a vibration arc medium 10, a high-frequency vibration electrical machine 6, a feeding chute 2, a concentrate discharging chute 4, a concentrate discharging flushing nozzle 3, a first dispersing flushing nozzle 7 and a second dispersing flushing nozzle 8; the sorting box body 9 is arranged on the frame 5, the lower part of the magnetic roller 1 is arranged in the sorting box body 9, and an arc-shaped channel is reserved between the magnetic roller and the sorting box body 9; the vibration arc-shaped medium 10 is one or more layers and is arranged in an arc-shaped channel between the magnetic roller 1 and the sorting box body 9 through an elastic suspension mechanism, the high-frequency vibration motor 6 is fixed on the vibration arc-shaped medium 10, and under the action of the high-frequency vibration motor 6, the vibration arc-shaped medium 10 performs high-frequency shearing motion with an elliptical composite track in the arc-shaped channel along the horizontal direction; the upper space of the arc-shaped channel above the vibrating arc-shaped medium 10 is a separation area, and the lower space of the arc-shaped channel below the vibrating arc-shaped medium 10 is an ore pulp flow channel; the magnetic roller 1 can rotate around a horizontal axis under the drive of the rotating motor 12, and a section of magnetic system is arranged in the magnetic roller 1 along the circumferential direction; relative to the rotation direction of the magnetic roller 1, the rear end of the separation box body 9 is provided with a feeding chute 2, and the front end of the separation box body 9 is provided with a concentrate discharging chute 4; a row of concentrate discharging flushing nozzles 3 are arranged above the concentrate discharging chute 4 and close to the magnetic roller 1 along the axial direction of the magnetic roller 1; a tailing discharge port 11 is arranged at the bottom of the separation box body 9 corresponding to the tail end of the ore pulp runner; one end of the arc-shaped channel, which is close to the concentrate discharge chute 4, is provided with a row of first dispersion washing nozzles 7 along the axial direction of the magnetic roller 1, and the other end of the arc-shaped channel is provided with a row of second dispersion washing nozzles 8 along the axial direction of the magnetic roller 1.
The elastic suspension mechanism is composed of a plurality of hook springs, one end of each hook spring is connected with the vibration arc-shaped medium 10, and the other end of each hook spring is fixedly connected with the inner wall of the sorting box body 9.
And the concentrate discharging and washing spray head 3, the first dispersing and washing spray head 7 and the second dispersing and washing spray head 8 are all high-pressure water spray heads.
The vibration arc-shaped medium 10 is arranged close to the magnetic roller 1, and the distance between the vibration arc-shaped medium and the magnetic roller is 3-5 mm.
The vibrating arc-shaped medium 10 is a sieve plate (shown in figure 3 a), a screen (shown in figure 3 b) or a net chain (shown in figure 3 c), and the aperture of the sieve is 1-4 mm.
The material of the vibration arc-shaped medium 10 is non-magnetic stainless steel or spring steel.
The vibration arc-shaped medium 10 is provided with 1-3 layers.
The magnetic system of the magnetic roller 1 is an electromagnetic magnetic system or a permanent magnetic system, the wrap angle of the magnetic system is 120 degrees, the adjustment range of the declination angle of the magnetic system is 15-20 degrees, and the magnetic field intensity is 1000-1500 Gs.
The separation box body 9 is of a downstream structure, a counter-flow structure or a semi-counter-flow structure.
The working method of the high-frequency vibration cylinder type magnetic separator comprises the following steps: the ore pulp is injected into an ore pulp flow channel of the separation box body 9 from the feeding chute 2, the magnetic roller 1 rotates from one end of the feeding chute 2 to one end of the concentrate discharging chute 4, and under the magnetic force action of a magnetic system, magnetic minerals in the ore pulp are upwards attracted; the vibrating arc-shaped medium 10 arranged close to the magnetic roller 1 is driven by the high-frequency vibrating motor 6 to do high-frequency shearing motion with an elliptical composite track along the horizontal direction, so that the turbulence intensity of ore pulp in a separation area is enhanced, and magnetic agglomeration or magnetic linkage is weakened and eliminated, thereby improving the separation efficiency; the first dispersing and washing nozzle 7 and the second dispersing and washing nozzle 8 simultaneously wash from two sides of the separation area, and nonmagnetic minerals fall back into the ore pulp flow channel through the sieve pores of the vibrating arc-shaped medium 10 under the action of dispersing and washing and are discharged from a tailing discharge port 11; after the magnetic minerals adsorbed on the magnetic roller 1 rotate out of the separation area along with the magnetic roller 1, the magnetic minerals are washed down by the concentrate discharge washing nozzle 3 above the concentrate discharge chute 4 and flow out of the concentrate discharge chute 4.
The utility model relates to a high frequency vibration cylinder magnet separator each component's effect as follows:
and the separation box body is used for providing a mineral separation space.
And the magnetic roller is connected with the separation box body through the rack and is used for selecting the iron ore concentrate in the ore pulp in a magnetic separation mode.
The vibrating arc-shaped medium is positioned in an arc-shaped channel between the sorting box body and the magnetic roller and is connected with the sorting box body through an elastic suspension mechanism; the method is used for enhancing the turbulence intensity of ore pulp in a separation area, and weakening and eliminating magnetic agglomeration or magnetic chains, thereby improving the separation efficiency.
And the high-frequency vibration motor is fixed on the vibration arc-shaped medium and is used for driving the vibration arc-shaped medium to generate high-frequency shearing motion with the horizontal composite track being elliptical.
And the feeding chute is used for receiving the ore pulp to be separated and guiding the ore pulp to be injected into the ore pulp flow channel of the separation box body.
And the tailing discharge port is used for collecting the non-magnetic minerals obtained after sorting.
The concentrate discharging chute is used for collecting the magnetic minerals obtained after separation;
and the concentrate discharge flushing nozzle is used for assisting the magnetic minerals to separate from the magnetic roller and removing the nonmagnetic slime.
The first dispersing and washing spray head and the second dispersing and washing spray head are used for dispersing mineral particles in ore pulp in the separation area.
The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.
[ example 1 ]
In the embodiment, the high-frequency vibration drum type magnetic separator comprises a rack, a magnetic roller, a rotating motor, a separation box body, a vibration arc-shaped medium, a high-frequency vibration motor, a feeding chute, a concentrate discharging and washing spray head, a dispersing and washing spray head I and a dispersing and washing spray head II; the separation box body is of a downstream structure, a permanent magnetic system is arranged in a magnetic roller, the wrap angle of the magnetic system is 120 degrees, the deflection angle of the magnetic system is 20 degrees, and the magnetic field intensity is 1200 Gs; the vibrating arc-shaped medium is positioned in an arc-shaped channel between the sorting box body and the magnetic roller and is connected with the sorting box body through an elastic suspension mechanism; the vibration arc-shaped medium is a stainless steel sieve plate with 3 layers, and the aperture of the sieve pore is 3 mm. The distance between the uppermost layer sieve plate and the outer wall of the magnetic roller is 30 mm.
And a magnetic separation tube test is adopted to represent the ideal selection index reached by a common magnetic separator. For the original ore of the benxi south fen magnetite with the grinding fineness of-0.053 mm and 100 percent (one-time grinding), the comparison of the separation index of the ordinary magnetic separator and the separation index of the high-frequency vibration magnetic separator under the condition of different magnetic field strengths is shown in figure 4.
As can be seen from FIG. 4, the separation index of the high-frequency vibration magnetic separator is above the separation performance reference line of the ordinary magnetic separator, and the data points in FIG. 4 show that the high-frequency vibration magnetic separator is adopted to actually improve the magnetic separation performance index. For example, when the recovery rate of the TFe of the concentrate is 80%, the TFe grade of 67.56% is obtained by using a common magnetic separator, and the TFe grade of the concentrate obtained by using a high-frequency vibration magnetic separator is 70.1%, so that the TFe grade can be used as an ultra-pure iron concentrate product, and the TFe grade is improved by 2.54% compared with that of the concentrate obtained by using the common magnetic separator.
[ example 2 ]
In the embodiment, the structure of a high-frequency vibration drum type magnetic separator is the same as that of the embodiment 1.
And a magnetic separation tube test is adopted to represent the ideal selection index reached by a common magnetic separator. For low-intensity magnetic separation concentrate (grinding fineness-0.074 mm 84.8%) in the flow of Liaoning Anshan saddle thousand concentrating mill, the comparison of the separation index of a common magnetic separator and the separation index of a high-frequency vibration magnetic separator under different magnetic field strengths is shown in FIG. 5.
As can be seen from FIG. 5, the separation index of the high-frequency vibration magnetic separator is above the separation performance reference line of the ordinary magnetic separator, and the data points in FIG. 5 show that the magnetic separation performance index can be improved by using the high-frequency vibration magnetic separator under the condition of coarse particle size fraction. When the TFe grade of the concentrate is 65 percent, the recovery rate of TFe obtained by using a common magnetic separator is 60 percent, and the recovery rate of TFe of the concentrate obtained by using a high-frequency vibration magnetic separator is 94.94 percent, compared with 34.94 percent.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (9)

1. A high-frequency vibration drum type magnetic separator is characterized by comprising a rack, a magnetic roller, a rotary motor, a separation box body, a vibration arc-shaped medium, a high-frequency vibration motor, a feeding chute, a concentrate discharging flushing nozzle, a first dispersion flushing nozzle and a second dispersion flushing nozzle; the sorting box body is arranged on the rack, the lower part of the magnetic roller is arranged in the sorting box body, and an arc-shaped channel is reserved between the magnetic roller and the sorting box body; the vibration arc-shaped medium is one to multiple layers and is arranged in an arc-shaped channel between the magnetic roller and the sorting box body through an elastic suspension mechanism, the high-frequency vibration motor is fixed on the vibration arc-shaped medium, and the vibration arc-shaped medium performs high-frequency shearing motion with an elliptical composite track in the arc-shaped channel along the horizontal direction under the action of the high-frequency vibration motor; the upper space of the arc-shaped channel above the vibrating arc-shaped medium is a separation area, and the lower space of the arc-shaped channel below the vibrating arc-shaped medium is an ore pulp flow channel; the magnetic roller can rotate around a horizontal axis under the drive of a rotating motor, and a section of magnetic system is arranged in the magnetic roller along the circumferential direction of the magnetic roller; relative to the rotation direction of the magnetic roller, the rear end of the separation box body is provided with a feeding chute, and the front end of the separation box body is provided with a concentrate discharging chute; a row of concentrate discharging flushing nozzles are arranged above the concentrate discharging chute and close to the magnetic roller along the axial direction of the magnetic roller; a tailing discharge port is arranged at the bottom of the separation box body corresponding to the tail end of the ore pulp runner; one end of the arc-shaped channel, which is close to the concentrate discharge chute, is provided with a row of first dispersion washing nozzles along the axial direction of the magnetic roller, and the other end of the arc-shaped channel is provided with a row of second dispersion washing nozzles along the axial direction of the magnetic roller.
2. The high-frequency vibrating cylinder magnetic separator as recited in claim 1, wherein the elastic suspension mechanism is composed of a plurality of hook springs, one end of each hook spring is connected with the vibrating arc-shaped medium, and the other end of each hook spring is fixedly connected with the inner wall of the separation box body.
3. The high-frequency vibrating barrel magnetic separator according to claim 1, wherein the concentrate discharge washing nozzle, the first dispersion washing nozzle and the second dispersion washing nozzle are all high-pressure water nozzles.
4. The high-frequency vibrating cylinder magnetic separator as recited in claim 1, wherein the vibrating arc medium is disposed close to the magnetic roller, and the distance between the vibrating arc medium and the magnetic roller is 10-50 mm.
5. A high-frequency vibration drum type magnetic separator as claimed in claim 1, 2 or 4, wherein the vibration arc medium is a sieve plate, a screen or a net chain, and the aperture of the sieve is 1-4 mm.
6. The high-frequency vibratory drum magnetic separator as recited in claim 1 wherein said vibratory arcuate media is selected from the group consisting of magnetically non-conductive stainless steel and spring steel.
7. The high-frequency vibrating cylinder magnetic separator as recited in claim 1, wherein the vibrating arc medium is provided with 1-3 layers.
8. The high-frequency vibrating cylinder magnetic separator as claimed in claim 1, wherein the magnetic system of the magnetic drum is an electromagnetic magnetic system or a permanent magnetic system, the wrap angle of the magnetic system is 120 °, the declination adjustment range of the magnetic system is 15-20 °, and the magnetic field intensity is 1000-1500 Gs.
9. The high frequency vibratory drum separator as set forth in claim 1 wherein said separator housing is of a forward flow configuration, a reverse flow configuration or a semi-reverse flow configuration.
CN202021616803.7U 2020-08-06 2020-08-06 High-frequency vibration cylinder type magnetic separator Active CN212349103U (en)

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CN202021616803.7U CN212349103U (en) 2020-08-06 2020-08-06 High-frequency vibration cylinder type magnetic separator

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113798045A (en) * 2021-08-23 2021-12-17 陈万学 Full-automatic ore sorting system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113798045A (en) * 2021-08-23 2021-12-17 陈万学 Full-automatic ore sorting system

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