CN203494651U - A magnetic ore magnetic separation unit - Google Patents

Abstract

The utility model discloses a magnetic ore magnetic separator unit for solve the poor problem of current magnet separator magnetic separation effect. The utility model discloses a high frequency sieve and magnet separator, the undersize of high frequency sieve is collected and is fought the feed of connecting the magnet separator and be responsible for, forms the ore pulp after the magnetic ore misce bene after the screening of high frequency sieve, and the magnetic material in the ore pulp receives the magnetic force effect of magnetic disc and is adsorbed on the collecting tray and rotate along with the collecting tray, and the magnetic material is unloaded under gravity and the multiple action of scraping the groove and scraping and grinding and is scraped in the groove and finally flow in the concentrate groove to realize quick recovery, recovery efficiency is high, the utilization ratio of ore resources.

Description

A magnetic ore magnetic separation unit

technical field

The utility model relates to the technical field of magnetic ore magnetic separation, in particular to a magnetic ore magnetic separation unit.

Background technique

Due to the large amount of development and utilization of iron ore mineral resources, the amount of available resources is continuously decreasing, resulting in the decreasing taste of raw ore mining, and the subsequent processing such as smelting has increasingly high requirements for the quality of beneficiation products. These realities have put forward higher and higher requirements for beneficiation equipment. , to promote the continuous development of mineral processing equipment in the direction of larger, better and energy-efficient. Most of the existing mineral processing units adopt an integrated structure. The unit is independently equipped with three parts: a vibrating screen, a centrifuge and an ore recovery device. Connected with the mineral material recovery device, the mineral material is screened by the vibrating screen and discharged from the discharge port of the vibrating screen. The mineral material discharged from the discharge port is transported to the centrifugal concentrator for screening. After two layers of screening, the final mineral material is Recycling unit for recycling collection. However, the concentrator with this structure has a single structure, low screening efficiency and low screening precision, which leads to the problem of poor magnetic separation effect.

The Chinese invention patent with the application number 02114994.1 discloses a double-product vertical ring pulse high gradient magnetic separator, including a sorting ring and a magnetic pole. Double pulse device for tailings and middle ore, the double pulse device is composed of double pulse mechanism, tailings hopper and middle ore hopper.

However, as the most commonly used magnetic separation equipment in mineral processing plants, the magnetic separator is mainly composed of a magnetic roller and a stripping roller. The motor drives the magnetic roller and the central shaft to rotate, and the central shaft drives the stripping roller to rotate through the transmission device. The mineral recovery rate of this commonly used magnetic separation equipment is low, which ultimately affects the effective utilization of mineral resources.

Contents of the invention

The utility model aims at the poor magnetic separation effect of the existing magnetic separator, and provides a magnetic ore magnetic separation unit, which can improve the separation effect of magnetic ore resources, high recovery rate of magnetic mineral ore, and utilization rate of magnetic ore resources.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A magnetic ore magnetic separation unit, characterized in that it includes a high-frequency screen and a magnetic separator, the high-frequency screen includes a screen frame suspended in the frame by rubber springs, and a mineral recovery device located below the screen frame, The mineral recovery device includes an undersieve collection bucket, the screen frame has at least two layers, and the screen frames are connected by a movable frame. A high-frequency sieve is provided in the screen frame, and a pulp supply device is provided on the screen frame. Vibration The magnetic separator is installed on the first layer of screen frame; the magnetic separator includes a frame, a central shaft installed on the frame, a feed box positioned at one side of the central shaft, and a number of disks mounted on the central shaft, and the magnetic disk consists of at least Two sets of permanent magnets are solidly installed, and it also includes the feeding main pipe, the feeding sub-pipe connecting the feeding main pipe and the feeding box, a number of collecting plates set outside the disk, and a scraping groove set between two adjacent collecting plates. The concentrate trough communicated with the scraping trough, the collecting pan is driven by a driving device, and the driving device includes a frequency conversion motor and a reducer; the undersize collecting hopper is connected to the feeding main pipe of the magnetic separator.

Further, the mineral recovery device also includes an undersize collection hopper, and the slurry supply device includes an ore feeder and an ore separator, and the ore feeder and the ore separator are connected through an ore feeder pipe.

Further, the angle between the screen frame and the horizontal plane is 16°~18°.

Further, the screen mesh is divided into upper, middle and lower layers closely fitted, the upper layer is a coarse mesh layer of stainless steel wire, the middle layer is a fine mesh layer of stainless steel wire, and the lower layer is a polyurethane mesh layer. The pore size of the fine mesh layer of stainless steel wire is Both are smaller than the pore diameter of the stainless steel wire coarse mesh layer and the polyurethane mesh layer.

Further, the sieve hole of the fine mesh layer of stainless steel wire is long strip shape, its long side is along the mineral flow direction, and the short side is perpendicular to the mineral flow direction. The ratio of the long side to the short side of the sieve hole is 1.5:1, and the short side is 0.12mm~0.15 mm.

Further, the permanent magnets are arranged along the end surface of the magnetic disk in a manner of alternating polarities of N and S.

Further, the permanent magnet is composed of NdFeB magnetic block and ferrite magnetic block, the NdFeB magnetic block is outside, and the ferrite magnetic block is inside.

Further, the two sides of the magnetic disk are provided with a non-magnetic area and a permanent magnetic area, the area of the non-magnetic area is smaller than that of the permanent magnetic area, and the position of the non-magnetic area is located at the scratch groove.

Further, the magnetic separator also includes a dilution spray pipe installed in the feed box, a stripping spray pipe installed at the scraper, the dilution spray pipe and the stripping spray pipe pass through the water separator and the installation The water inlet pipes on the rack are connected.

Further, a magnetic barrier is provided at the feed inlet of the feed box.

Compared with the prior art, the utility model has the beneficial effects of:

1. The magnetic ore magnetic separation unit of the present utility model includes a high-frequency screen and a magnetic separator, and the high-frequency screen includes a screen frame suspended in the frame by rubber springs, and a mineral recovery device located below the screen frame, The mineral recovery device includes an undersieve collection bucket, the screen frame has at least two layers, and the screen frames are connected by a movable frame. A high-frequency sieve is provided in the screen frame, and a pulp supply device is provided on the screen frame. Vibration The magnetic separator is installed on the first layer of screen frame; the magnetic separator includes a frame, a central shaft installed on the frame, a feed box positioned at one side of the central shaft, and a number of disks mounted on the central shaft, and the magnetic disk consists of at least Two sets of permanent magnets are solidly installed, and it also includes the feeding main pipe, the feeding sub-pipe connecting the feeding main pipe and the feeding box, a number of collecting plates set outside the disk, and a scraping groove set between two adjacent collecting plates. The concentrate trough communicated with the scraping trough, the collecting pan is driven by a driving device, and the driving device includes a frequency conversion motor and a reducer; the undersize collecting hopper is connected to the feeding main pipe of the magnetic separator. The high-frequency sieve adopts at least two layers of overlapping screen frames, which occupy a small area; the screen frames are connected by movable frames to make full use of energy consumption; each screen frame is equipped with a screen, which is equivalent to increasing the effective capacity of the screen. The high-frequency screen adopts high frequency and small amplitude, which can reduce and prevent the clogging of screen holes, complete mineral separation, high screening efficiency and beautiful appearance of the overall structure. The ore after high-frequency screening is transported to the feeding main pipe of the magnetic separator. The magnetic material in the pulp is attracted to the collecting plate by the magnetic force of the disk and rotates with the collecting plate. The magnetic material is scraped by gravity and the scraping groove. Under the multiple actions of the mill, it is unloaded into the scraping tank and finally flows into the concentrate tank, so as to realize rapid recovery, high recovery efficiency and utilization rate of ore resources.

2. The screen box of the utility model is arranged obliquely, so that the angle between the screen and the horizontal plane is 16°~18°, which further improves the screening efficiency and facilitates the flow of minerals in the screen to the collection bucket.

3. The screen of the present invention adopts a three-layer structure, which has high strength, rigidity and bearing capacity, and prolongs the service life of the screen. Even if the stainless steel wire fine mesh layer with a small aperture is damaged, it only needs to be replaced. The stainless steel wire fine mesh layer, other screens can still be used, thus saving the production cost.

4. The sieve hole of the stainless steel wire fine mesh layer of the utility model is set as a strip shape, and its purpose is to control the particle size from one direction, and increase the opening rate from the other direction. The opening ratio of the screen improves the grade of minerals. The ratio of the long side to the short side is set to 1.5:1 to ensure that the opening ratio of the screen is high and the screening efficiency is improved.

5. The permanent magnets of the present utility model are fixed in the way of alternating polarities N and S, so as to realize multiple flipping of magnetic minerals, non-magnetic or weakly magnetic minerals fall during the flipping of magnetic minerals, and improve the magnetic minerals. taste.

6. The permanent magnet of the present utility model is composed of NdFeB magnetic block and ferrite magnetic block. The NdFeB magnetic block is outside and the ferrite magnetic block is inside. The permanent magnet is composed of NdFeB magnetic block and ferrite The magnetic field strength on the surface of the disk is high, and the magnetic field strength can be adjusted arbitrarily within a certain range by changing the thickness or area ratio of the two to meet different beneficiation requirements.

7. The utility model sets up a non-magnetic area and a permanent magnetic area on the disk. When the magnetic material reaches the non-magnetic area, it will be unloaded. Therefore, there is no magnetic force when the magnetic material is unloaded, and it is easier to be unloaded, realizing rapid recovery.

Eight, the magnetic separator of the present utility model also includes the dilution spray pipe installed in the feeding box, the stripping spray pipe installed in the scraper, the dilution spray pipe and the stripping spray pipe pass through the water separator and The main water inlet pipes installed on the frame are connected to each other, which can dilute the slurry concentration and help stripping, so as to improve work efficiency.

9. The feeding port of the feeding box of the utility model is provided with a magnetic barrier, which can absorb metal objects such as iron nails and iron bars, without damaging the magnetic separation cavity of the magnetic separator, and is easy to use , to reduce the damage rate of equipment.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model;

Fig. 2 is the structural representation of an embodiment of the high-frequency sieve of the present utility model;

Fig. 3 is the structural representation of the utility model high-frequency screen mesh;

Fig. 4 is the structural representation of an embodiment of the magnetic separator of the present invention;

Fig. 5 is a partial cross-sectional structural schematic diagram of the collecting tray and the scraping groove of the magnetic separator of the present invention;

Fig. 6 is a schematic diagram of the arrangement of permanent magnets on the disk of the magnetic separator of the present invention;

Marks in the figure: 1. High-frequency screen, 2. Magnetic separator, 3. Stirring mechanism, 4. Pump, 5. Body, 6. Central shaft, 7. Feed box, 8. Feed supervisor, 9. Feed In charge, 10. Driving device, 11. Concentrate tank, 12. Disk, 13. Collecting tray, 14. Scraping tank, 15. Permanent magnetic area, 16. Non-magnetic area, 17. Rack, 18. Screen frame, 19. Activities Frame, 20, vibrator, 21, oversize collection bucket, 22, undersize collection bucket, 23, ore feeding device, 24, ore separator, 25, ore feeding pipe, 26, stainless steel wire coarse mesh layer, 27 , Stainless steel wire mesh layer, 28, polyurethane mesh layer.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the utility model, and any improvement without creativity made without departing from the theme of the utility model belongs to the protection of the utility model scope.

The magnetic ore magnetic separation unit of the utility model includes a high-frequency screen and a magnetic separator,

The high-frequency screen includes a frame and a screen frame. At least two screen frames are stacked, and the screen frame is suspended from the frame by rubber springs. In this embodiment, 5 screen frames are selected, and 5 screen frames are stacked in parallel to form Layered structure, the angle between each screen frame and the horizontal plane is 16°~18°, the multi-layer screen frames are connected by movable frames, the first layer of screen frame is equipped with a vibrator, and the vibrator can adopt three-phase asynchronous The vibration motor and the exciting force generated by the vibrator drive the screen frame to move in a straight line. Since there is a movable frame connected between the screen frames, the screen frames of other layers move in a straight line with the screen frame of the first layer. Sieve screen, in order to realize the screening of the sieve.

The high-frequency sieve installed on the screen frame is a new type of high-frequency sieve. The new high-frequency sieve includes a three-layer structure, in which the upper layer is a coarse mesh layer of stainless steel wire, and the middle layer is a fine stainless steel wire Mesh layer, the lower screen is polyurethane mesh layer. The polyurethane mesh layer adopts a macroporous structure with thick wires criss-crossing, and steel wires intersecting vertically and horizontally can also be embedded in the polyurethane mesh layer. When in use, the polyurethane network layer is in direct contact with the vibration device. There is a stainless steel wire layer on the polyurethane mesh layer, and the stainless steel wire layer is divided into a stainless steel wire coarse mesh layer at the top and a stainless steel fine mesh layer at the bottom according to the difference in pore size. Tight fit between layers of screens. The pore size of the stainless steel wire fine mesh layer is set as a strip shape, the long side is along the mineral flow direction, and the short side is perpendicular to the mineral flow direction. The ratio of the long side to the short side of the long strip hole is set to 1.5:1. The short side is 0.12mm-0.18mm, which is determined by the process requirements. The reason why the sieve aperture is set as a strip shape is to control the particle size of the undersize from the short side direction, and to control the opening ratio of the sieve cloth from the long side direction, and the ratio of the long side to the short side is set to 1.5: 1 is also mainly to take into account the relevant requirements of undersize particle size and opening ratio. In order to better screen the minerals that meet the requirements, the stainless steel fine mesh layer can be set as a rotatable structure. By rotating the stainless steel fine mesh layer, the mesh number of the screen can be adjusted at any time, which can meet the needs of screening minerals with different particle sizes. . There is no special requirement for the aperture shape of the stainless steel wire coarse mesh layer, which can be square, circular, oval, but preferably elongated. The aperture of the stainless steel wire coarse mesh layer is larger than the aperture of the lower stainless steel wire fine mesh layer. Among the above three screen mesh layers, the apertures of the middle stainless steel fine mesh layer are smaller than the apertures of the upper stainless steel coarse mesh layer and the lower polyurethane mesh layer.

A pulp supply device is provided on the screen frame, and the pulp supply device can directly use a pulp distributor, or a combination of an ore separator and an ore feeder.

Pulp distributor: The feed pipe of the pulp distributor extends into the pulp distribution box. There are multiple slurry pools around the pulp distribution box. Overflow ports are respectively set at the corresponding slurry pools on the pulp distribution box. At the bottom of the slurry tank, there is a feeding pipe for connecting the screen box. During normal use, the pulp enters the pulp distribution box through the feed pipe and the liquid level of the pulp gradually rises to the height of the overflow port, then the pulp enters each slurry pool from the overflow port, and finally passes through the ore feeding tank connected to the bottom of the slurry pool The tube sprinkles the slurry on the screen in the screen frame.

Combination of ore separator and ore feeder: There is a ore feeder on each layer of screen frame, and the ore feeder on each layer of screen frame is connected to the ore separator above the screen frame through the ore feed pipe. The ore slurry is transported to the ore feeder of each screen frame through the ore feeding pipe, and the ore feeder sprinkles the ore slurry evenly on the screen in the screen frame for screening. In order to make the screening more efficient, the screens in each layer of the screen frame can be set to two, and a re-pulping groove is set between the two screens. The minerals on the first screen have been dehydrated and dehydrated after being screened. Grouping, and then flow the dehydrated and grouped minerals to the re-pulping groove, supply water, stir into a slurry, and then flow to the second screen for screening.

There is a mineral recovery device under the screen frame at the bottom, through which the oversize and undersize of the screen are collected respectively, and the mineral recovery device can directly collect the oversize and undersize by using a collection bucket , the oversize and undersize can also be transported to the workshop of the next process by belt transmission.

The utility model adopts the form of a collection bucket, and an oversize collection bucket and an undersize collection bucket are arranged under the bottom sieve frame. The undersize collection bucket is used to collect the undersize in all the screen frames above it after sieving through the sieve.

The magnetic separator of the present embodiment includes a frame, a central shaft mounted on the frame through bearings, a number of disks are installed in gaps on the central shaft, permanent magnetic regions and non-magnetic regions are arranged on both sides of the magnetic disks, and the area of the permanent magnetic regions is greater than that of the non-magnetic regions. The area of the permanent magnet area is formed by at least two sets of permanent magnets fixed in it. All the permanent magnets are alternately distributed in polarity N and S, and the axial direction can be designed as a single-layer or multi-layer stack according to performance requirements. The permanent magnet It is composed of NdFeB magnetic block and ferrite magnetic block. The surface shape and size of the NdFeB magnetic block are the same as the ferrite magnetic block. The NdFeB magnetic block is outside and the ferrite magnetic block is inside. Or edge alignment constitutes a composite magnetic block. Each disk is equipped with a collecting disc that can rotate around the central axis. The collecting disc is driven by a drive device. The driving device includes a frequency conversion motor and a reducer. Clockwise rotation, select the direction according to the flow rate and flow rate of the pulp raw material. There is a scraping groove between two adjacent collecting disks corresponding to the non-magnetic area of the magnetic disk. The scraping groove scrapes the magnetic material on the collecting disk into the scraping groove, and the scraped magnetic material is discharged into the concentrate tank through the scraping groove collected within. A feed box is set on one side of the central axis, and a magnetic barrier for absorbing metal objects such as iron nails and iron sheets is installed at the feed port of the feed box. A number of feeding pipes are evenly arranged on the feed box. The feed branch pipe is connected with the feed main pipe, and the feed main pipe is connected with the external water supply device. In order to improve work efficiency and high recovery efficiency, a dilution spray pipe is specially installed in the feed box, and a stripping spray pipe is provided at the scraping groove. The dilution spray pipe is used to dilute the concentration of the pulp and make the pulp uniform; it is used for washing off The magnetic material stripping spray pipe on the collecting tray can be directly used as a pipeline, or it can be composed of an upper spray pipe and a lower spray pipe. The upper spray pipe and the lower spray pipe work at the same time, which helps to remove the material. , clean the catch tray again. The dilution spray pipe and the stripping spray pipe are connected to the main water inlet pipe installed on the frame through the water separator. In order to save water resources, throttle valves can be set on the corresponding pipes.

Before the drive device of the magnetic separator is started, the magnetic ore after high-frequency screening is transported to the main feeder of the magnetic separator, and the stirring mechanism can be connected to the undersize collecting bucket of the high-frequency sieve. The stirring mechanism is equipped with The water pipe, the magnetic ore is stirred evenly in the stirring mechanism, and then the ore slurry is transported to the feeding main pipe by the pump. It is also possible to directly set the discharge hopper of the high-frequency screen above the main feeder, and install a water pipe in the main feeder or the feeder box to mix the magnetic ore to form a slurry. As a preferred method, a stirring mechanism is connected to the discharge hopper of the high-frequency screen, and the stirring mechanism is equipped with a water pipe. The magnetic ore is stirred evenly in the stirring mechanism, and then the slurry is transported to the feeding main pipe by a pump. The stirring mechanism can be understood and understood by those skilled in the art, and will not be repeated here.

The lower part of the collection plate and the permanent magnetic area of the magnetic disk are immersed in the slurry, and the non-magnetic area of the magnetic disk is located in the middle and upper part. Start the driving device and drive the collecting disc to rotate. The magnetic material in the pulp is attracted to the collecting disc by the magnetic force of the permanent magnet area in the disc. The magnetic material adsorbed to the collecting disc will leave the pulp with the rotation of the collecting disc. The collecting tray continues to rotate, and the magnetic materials on the collecting tray then transfer to the non-magnetic area, and the magnetic force of the magnetic materials in the non-magnetic area becomes smaller or does not exist, and is discharged under the multiple effects of gravity, the force of the scraping groove and the impulse of the flushing pipe. into the scraping chute, and finally discharged into the concentrate chute through the scraping chute for collection. Since the magnetic disk is fixed and the collection disk rotates, the magnetic material is absorbed on the collection disk, so the rotating collection disk continuously absorbs the magnetic material from the ore pulp, thus realizing the rapid recovery of the magnetic material with high recovery efficiency. the

Claims (10)

1. A magnetic ore magnetic separation unit is characterized in that: it comprises a high-frequency screen and a magnetic separator, and the high-frequency screen includes a screen frame suspended in the frame by rubber springs, a mineral recycling machine located at the bottom of the screen frame device, the mineral recovery device includes an undersieve collection bucket, the screen frame has at least two layers, the screen frames are connected by a movable frame, a high-frequency sieve is provided in the screen frame, and a pulp supply device , the vibrator is installed on the first layer of screen frame; the magnetic separator includes a frame, a central shaft installed on the frame, a feed box located on one side of the central shaft, a number of magnetic disks installed on the central shaft, and a magnetic disk It is composed of at least two sets of permanent magnets, and also includes a main feed pipe, a feed pipe connecting the main feed pipe and the feed box, a number of collection plates set outside the disk, and a scraper set between two adjacent collection plates. The tank is a concentrate tank connected with the scraping tank, and the collecting plate is driven by a driving device, which includes a frequency conversion motor and a reducer; the undersize collecting bucket is connected to the main feeder of the magnetic separator. 2. The magnetic ore magnetic separation unit according to claim 1, characterized in that: the mineral recovery device also includes an undersize collection hopper, the pulp supply device includes an ore feeder and an ore separator, and the ore feeder and the ore separator The devices are connected by feeding pipes. 3. The magnetic separation unit for magnetic ore according to claim 1, characterized in that: the angle between the screen frame and the horizontal plane is 16°-18°. 4. The magnetic separation unit for magnetic ore according to claim 1, characterized in that: the screen is divided into upper, middle and lower layers closely fitted, the upper layer is a coarse mesh layer of stainless steel wire, and the middle layer is a fine mesh layer of stainless steel wire. The mesh layer, the lower layer is a polyurethane mesh layer, and the apertures of the stainless steel fine mesh layer are smaller than the apertures of the stainless steel coarse mesh layer and the polyurethane mesh layer. 5. magnetic ore magnetic separation unit according to claim 4, it is characterized in that: the sieve hole of stainless steel wire fine mesh layer is elongated, and its long side is along mineral flow direction, and short side is perpendicular to mineral flow direction, and the long side of sieve hole and The ratio of the short side is 1.5:1, and the short side is 0.12mm~0.15mm. 6. The magnetic separation unit for magnetic ore according to claim 1, characterized in that: the permanent magnets are arranged along the end surface of the disk in such a way that the polarities of N and S are alternately arranged. 7. The magnetic ore magnetic separation unit according to claim 6, characterized in that: the permanent magnet is composed of NdFeB magnetic block and ferrite magnetic block, the NdFeB magnetic block is outside, and the ferrite magnetic block is block inside. 8. The magnetic separation unit for magnetic ore according to claim 7, characterized in that: the two sides of the magnetic disk are provided with a non-magnetic area and a permanent magnetic area, the area of the non-magnetic area is smaller than the area of the permanent magnetic area, and the position of the non-magnetic area is located in the scraping groove place. 9. The magnetic ore magnetic separation unit according to claim 8, characterized in that: the magnetic separator also includes a dilution spray pipe installed in the feed box, a stripping spray pipe installed at the scraping groove, The dilution spray pipe and the stripping spray pipe are connected to the main water inlet pipe installed on the frame through the water distributor. 10. The magnetic separation unit for magnetic ore according to claim 9, characterized in that: a magnetic barrier is provided at the feed inlet of the feed box.

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