CN111195558A

CN111195558A - Magnetic separation equipment

Info

Publication number: CN111195558A
Application number: CN202010240688.6A
Authority: CN
Inventors: 童丹桂
Original assignee: Anqing Meiteyou Intelligent Technology Co Ltd
Current assignee: Anqing Meiteyou Intelligent Technology Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-05-26

Abstract

The invention belongs to the technical field of ore, particularly quartz sand processing, and particularly relates to magnetic separation equipment, which comprises a slurry discharge device and a magnetic separation device, wherein the slurry discharge device is positioned above the magnetic separation device; the magnetic separation device disclosed by the invention has the advantages that the pulp can be fully contacted with the disc surface, the iron is fully adsorbed, the pulp can be fully separated from the iron by the centrifugal force applied to the pulp, and the iron and the pulp are more thoroughly separated.

Description

Magnetic separation equipment

Technical Field

The invention belongs to the technical field of ore, particularly quartz sand processing, and particularly relates to magnetic separation equipment.

Background

The purification of the quartz sand needs a plurality of process flows of iron removal, mud removal, drying and the like, a wet magnetic separator is generally adopted for iron removal operation in the prior art, and the reuse process of the wet magnetic separator in the prior art has two defects, one is that a magnetic suction component cannot be fully contacted with the slurry, so that part of iron remains, the iron removal effect is poor, and part of quartz sand slurry is adsorbed on the iron due to the liquid tension and is discharged along with the iron, so that a large amount of loss is caused; and secondly, a large amount of scattered water and washing water is needed in the iron removal process, so that the water resource consumption is high and the environment is not protected.

Disclosure of Invention

The invention aims to provide magnetic separation equipment which can remove iron in quartz sand ore pulp and has high iron removal efficiency and good separation effect.

The technical scheme adopted by the invention is as follows:

a magnetic separation device comprises a slurry discharge device and a magnetic separation device, wherein the slurry discharge device is positioned above the magnetic separation device and comprises a slurry storage barrel, a slurry discharge port is formed in the bottom of the slurry storage barrel and provided with a slurry discharge valve with an adjustable opening degree, a floating adjusting mechanism connected with the slurry discharge valve is arranged in the slurry storage barrel, and the floating adjusting mechanism is assembled in such a way that the opening degree of the slurry discharge valve is gradually increased by driving the floating adjusting mechanism in the process that the liquid level of slurry in the slurry storage barrel is gradually reduced; the magnetic separation device comprises a magnetic separation disc and a barrel body, the magnetic separation disc comprises a first disc body and a second disc body which are coaxially arranged, the first disc body is positioned above the second disc body, through holes are formed in the centers of the first disc body and the second disc body, vortex-shaped baffles which are radially distributed are arranged on the disc surface of the first disc body at intervals along the circumferential direction, a spiral magnetic attraction unit is arranged on the disc surface of the second disc body, the spiral magnetic attraction unit is in sliding fit with the bottom surface of the first disc body, the first disc body and the second disc body are arranged on the rack in a rotating mode in the same direction, and the rotating speed of the first disc body is larger than that of the second disc body; the magnetic separation disc is arranged at the center of the barrel body, a slag discharge pipe aligned with the center of the magnetic separation disc is arranged at the center of the barrel body, the slag discharge pipe is arranged below the magnetic separation disc, the upper end of the slag discharge pipe is communicated with a central through hole of the magnetic separation disc, the slag discharge pipe penetrates through the bottom wall of the barrel body, and a slag discharge hole is formed in the side wall of the barrel body; the slurry discharging port is arranged right opposite to the center of the magnetic separation disc, the slurry discharging port is provided with a conical slurry guiding cover, the slurry guiding cover is used for dispersing slurry discharged from the slurry discharging port into a ring shape, and the diameter of the lower end of the conical slurry guiding cover is larger than that of the center hole of the magnetic separation disc.

The slurry discharge valve comprises a valve core movably arranged along the vertical direction, and the valve core is in insertion fit with the upper end of the slurry discharge port; the floating adjusting mechanism comprises an elastic component and a floating component, wherein the elastic component is assembled to enable the elastic force of the elastic component to drive the valve core to be opened upwards, the floating component is assembled to enable the buoyancy of the floating component to be converted into the lower pressure applied to the valve core, and the lower pressure can be changed along with the height of the liquid level of the slurry, namely the higher the liquid level of the slurry is, the higher the lower the pressure is, and the lower the pressure is, the smaller the slurry level is.

The elastic component comprises a vertical valve rod fixedly connected with the valve core, a mounting bracket is arranged in the slurry storage barrel, the valve rod is connected with the mounting bracket in a sliding manner, a pressure spring is arranged between the valve rod and the mounting bracket, and the pressure spring is assembled to enable the elastic force of the pressure spring to drive the valve rod to move upwards relative to the mounting bracket; the float assembly comprises a float and a connecting rod, the float is cylindrical, the float is in sliding connection with the mounting support along the vertical direction, a rod body of the connecting rod is in pivot joint with the mounting support, waist-shaped holes are formed in two ends of the connecting rod, one end of the connecting rod is in sliding pivot joint with a pin shaft arranged at the top end of the valve rod through the waist-shaped holes, and the other end of the connecting rod is in sliding pivot joint with a pin shaft arranged on a push rod at the upper end of the float through the waist-shaped holes; the floating components are provided with two groups and are symmetrically distributed on two sides of the elastic component.

The slurry discharging valve also comprises a valve casing, the bottom of the slurry storage barrel is funnel-shaped, the slurry discharging port is a cylindrical structure vertically arranged at the bottom of the slurry storage barrel, the valve casing and the valve core are coaxially arranged with the slurry discharging port, the valve casing is arranged at intervals with the upper end of the slurry discharging port along the vertical direction, the diameter of the inner annular surface of the valve casing is consistent with that of the inner annular surface of the slurry discharging port, and the valve core is arranged between the valve casing and the slurry discharging port in a sliding manner; the upper end of the valve shell is connected with a vertical conduit, the valve rod penetrates through the vertical conduit, and the upper end of the vertical conduit is fixedly connected with a mounting bracket fixedly arranged in the pulp storage barrel; the lower end of the valve core is convexly provided with a connecting column, the lower end of the connecting column is provided with a conical slurry guide cover, and the slurry guide cover is used for dispersing slurry discharged from the slurry discharge port into a ring shape.

And a vertical threaded rod is arranged at the upper end of the valve rod at intervals and is in threaded connection with the mounting bracket, and a hand wheel is arranged at the upper end of the threaded rod.

The annular water tank is arranged at the upper end of the outer wall of the slurry storage barrel, a shared wall is arranged between the annular water tank and the slurry storage barrel, namely the upper end barrel wall of the slurry storage barrel, the bottom wall of the annular water tank and the barrel wall of the slurry storage barrel form sliding fit, at least two piston cylinders are arranged below the annular water tank at intervals along the circumferential direction of the slurry storage barrel, the cylinder bodies of the piston cylinders are fixedly connected with the barrel wall of the slurry storage barrel, and the piston rods of the piston cylinders are connected with the bottom of the annular water tank in a blocking mode.

A first annular rail is arranged on the bottom surface of the first tray body, a plurality of first rollers which are in rolling fit with the first annular rail are arranged on the rack, and the first rollers are uniformly arranged at intervals along the circumferential direction of the first tray body; the bottom surface of the second tray body is provided with a second annular track, the rack is provided with a second roller which is matched with the second annular track in a rolling manner, and the second roller is uniformly arranged along the circumferential direction of the second tray body at intervals.

Be equipped with in the frame and be used for driving first disk body and second disk body pivoted actuating mechanism simultaneously, actuating mechanism includes first gear, the second gear that sets up in the frame to and the outer ring gear of ring gear and the setting of second disk body bottom that first disk body bottom set up, first gear meshes with second gear and ring gear respectively, the second gear meshes with outer ring gear again, first gear and second gear set up the multiunit along the even interval in circumference of first disk body and second disk body, and at least one of them first gear or second gear link to each other with driving motor.

And guard plates which extend downwards are arranged on the edge of the central hole and the edge of the outer ring surface of the first tray body.

The bottom surface of the barrel body is inclined, and the ore discharge port is arranged at the lower side of the bottom surface.

The invention has the technical effects that: the slurry discharge device can uniformly and downwards disperse and discharge the ore slurry, and ensures that downstream magnetic separation equipment is uniformly contacted with the slurry; the magnetic separation device disclosed by the invention has the advantages that the pulp can be fully contacted with the disc surface, the iron is fully adsorbed, the pulp can be fully separated from the iron by the centrifugal force applied to the pulp, and the iron and the pulp are more thoroughly separated.

Drawings

FIG. 1 is a perspective view of a magnetic separation apparatus provided by an embodiment of the present invention;

FIG. 2 is a perspective view of a slurry discharge apparatus provided by an embodiment of the invention;

FIG. 3 is a perspective view of a magnetic separation apparatus provided by an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a magnetic separation apparatus provided by an embodiment of the present invention;

FIG. 5 is an enlarged view of section I of FIG. 4;

FIG. 6 is an enlarged partial view of II of FIG. 4;

FIG. 7 is an exploded view of a magnetic separation disk provided by an embodiment of the present invention;

FIG. 8 is an exploded view of another perspective of a magnetic separation disk provided by an embodiment of the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

Example 1

As shown in fig. 1, 2, 3 and 4, the magnetic separation equipment for removing iron from ores, particularly quartz sand, comprises a slurry discharge device 10 and a magnetic separation device 20, wherein the slurry discharge device 10 is positioned above the magnetic separation device 20; arrange thick liquid device 10 including storing up thick liquid bucket 11, stores up thick liquid bucket 11 bottom and is equipped with row thick liquid mouth 15, it is equipped with aperture size adjustable row thick liquid valve to arrange thick liquid mouth 15, store up and be equipped with the unsteady adjustment mechanism 12 of being connected with row thick liquid valve in the thick liquid bucket 11, unsteady adjustment mechanism 12 is assembled for the thick liquid level in storing up thick liquid bucket 11 and reduces the in-process gradually, and unsteady adjustment mechanism 12 can drive the degree of opening crescent who arranges the thick liquid valve. The pulp discharging device 10 in the invention can uniformly and downwards disperse and discharge pulp, and ensure that downstream magnetic separation equipment is uniformly contacted with the pulp, and the principle is as follows: when the liquid level of the slurry is high, the pressure of the slurry discharging port 15 is high, the opening degree of the slurry discharging valve needs to be reduced, when the liquid level of the slurry is low, the pressure of the slurry discharging port 15 is low, the opening degree of the slurry discharging valve needs to be increased, so that the front and rear slurry discharging speeds are consistent, the floating adjusting mechanism 12 can automatically adjust the opening degree of the slurry discharging valve by utilizing the buoyancy difference generated by different liquid levels, the automatic control of the valve is realized by utilizing a mechanical mode, and the use of electronic detection and control elements under complex working conditions is avoided; as shown in fig. 7, the magnetic separation device 20 includes a magnetic separation disc 21 and a barrel 22, the magnetic separation disc 21 includes a first disc 211 and a second disc 212 coaxially disposed, the first disc 211 is located above the second disc 212, through holes are disposed at the centers of the first disc 211 and the second disc 212, spiral baffles 2111 radially disposed are circumferentially disposed on the disc surface of the first disc 211 at intervals, a spiral magnetic unit 2121 is disposed on the disc surface of the second disc 212, the spiral magnetic unit 2121 is in sliding fit with the bottom surface of the first disc 211, the first disc 211 and the second disc 212 are disposed on the frame 210 in a same rotation direction, and the rotation speed of the first disc 211 is greater than that of the second disc 212; magnetic separation dish 21 sets up in the center of staving 22, and staving 22 center is equipped with the scum pipe 222 that aligns with magnetic separation dish 21 center, and scum pipe 222 sets up in magnetic separation dish 21 below, and scum pipe 222 upper end and magnetic separation dish 21's central through-hole intercommunication, and scum pipe 222 runs through the diapire setting of staving 22, is equipped with the ore discharge mouth on the staving 22 lateral wall. The magnetic separation device 20 of the invention utilizes a double separation mode of magnetic attraction and centrifugation to fully separate ore pulp from iron, and the principle is as follows: ore pulp falls on first dish 211 from first dish 211 middle part, under the centrifugal force effect, ore pulp forms the liquid film and outdiffusion on first dish 211, this process can make thick liquid and first dish 211 fully contact, the unit is inhaled to the spiral magnetism of first dish 211 below can adsorb iron on the quotation of first dish 211, simultaneously along with the rotation of unit for first dish 211 is inhaled to the spiral magnetism, iron draws close to first dish 211 center gradually under the guide of vortex form baffle 2111, until falling into in the central through hole, and the thick liquid then is thrown out the dish under the centrifugal force effect and is external and spill in staving 22, and then realize the abundant separation of thick liquid and iron. The invention has the advantages that the slurry can be fully contacted with the disc surface, iron is fully absorbed, the slurry can be fully separated from the iron by the centrifugal force applied to the slurry, and the iron is more thoroughly separated from the slurry; the slurry discharge port 15 is arranged right opposite to the center of the magnetic separation disc 21, the slurry discharge port 15 is provided with a conical slurry guide cover 156, the slurry guide cover 156 is used for dispersing slurry discharged from the slurry discharge port 15 into a ring, the diameter of the lower end of the conical slurry guide cover 156 is larger than that of the central hole of the magnetic separation disc 21, and the conical slurry guide cover 156 can enable the slurry to be uniformly splashed into the middle of the magnetic separation disc in a ring shape.

Specifically, as shown in fig. 6, the slurry discharge valve includes a valve core 151 movably disposed along a vertical direction, and the valve core 151 and the upper end of the slurry discharge port 15 form a plug-in fit; the floating adjusting mechanism 12 comprises an elastic component 13 and a floating component 14, the elastic component 13 is assembled to enable the valve core 151 to be opened upwards under the action of elastic force, the floating component 14 is assembled to enable buoyancy of the floating body 141 to be converted into downward pressure exerted on the valve core 151, and the downward pressure can be changed along with the height of the slurry liquid level, namely the slurry liquid level is higher, the downward pressure is larger, and the slurry liquid level is lower, and the pressure is smaller. The buoyancy is different when the depth of the buoy assembly 14 immersed in the slurry is different, and the invention utilizes the principle to realize the adjustment of the output force of the buoy assembly 14.

Preferably, as shown in fig. 4 and 5, the elastic component 13 includes a vertical valve rod 152 fixedly connected to the valve core 151, a mounting bracket is arranged in the slurry storage barrel 11, the valve rod 152 is slidably connected to the mounting bracket, a pressure spring is arranged between the valve rod 152 and the mounting bracket, and the pressure spring is assembled such that the elastic force of the pressure spring can drive the valve rod 152 to move upward relative to the mounting bracket; the float assembly 14 comprises a float 141 and a connecting rod 142, the float 141 is cylindrical, the float 141 is in sliding connection with the mounting support along the vertical direction, a rod body of the connecting rod 142 is in pivot connection with the mounting support, waist-shaped holes are formed in two ends of the connecting rod 142, one end of the connecting rod 142 is in sliding pivot connection with a pin shaft arranged at the top end of the valve rod 152 through the waist-shaped holes, and the other end of the connecting rod 142 is in sliding pivot connection with a pin shaft arranged on a push rod at the upper end of the float 141 through the waist-shaped holes; the floating components 14 are provided with two groups and symmetrically distributed on two sides of the elastic component 13. Further, as shown in fig. 1, 2, 4 and 5, a vertical threaded rod 171 is arranged at the upper end of the valve rod 152 at intervals, the threaded rod 171 is in threaded connection with the mounting bracket, and a hand wheel 17 is arranged at the upper end of the threaded rod 171. When the emptying is started, the hand wheel 17 is firstly rotated to separate the threaded rod 171 from the valve rod 152, the valve rod 152 is lifted upwards under the action of the pressure spring, meanwhile, the valve rod 152 is lifted to a smaller height due to the larger buoyancy of the float 141 at the moment, the buoyancy of the float 141 is gradually reduced along with the descending of the slurry liquid level, the valve rod 152 can be slowly lifted under the action of the pressure spring, and then the opening degree of the valve core 151 is gradually increased.

Preferably, as shown in fig. 6, the slurry discharge valve further includes a valve housing 153, the bottom of the slurry storage tank 11 is funnel-shaped, the slurry discharge port 15 is a cylindrical structure vertically arranged at the bottom of the slurry storage tank 11, the valve housing 153 and the valve core 151 are coaxially arranged with the slurry discharge port 15, the valve housing 153 is arranged at an interval with the upper end of the slurry discharge port 15 along the vertical direction, the diameter of the inner annular surface of the valve housing 153 is consistent with the diameter of the inner annular surface of the slurry discharge port 15, and the valve core 151 is slidably arranged between the valve housing 153 and the slurry discharge port 15; the upper end of the valve casing 153 is connected with a vertical conduit 154, the valve rod 152 is arranged in the vertical conduit 154 in a penetrating way, and the upper end of the vertical conduit 154 is fixedly connected with a mounting bracket fixedly arranged in the pulp storage barrel 11; the lower end of the valve core 151 is convexly provided with a connecting column, the lower end of the connecting column is provided with a conical slurry guide cover 156, and the slurry guide cover 156 is used for dispersing slurry discharged from the slurry discharge port 15 into a ring shape.

Further, as shown in fig. 1, 2, and 4, the device further includes a flushing device, the flushing device includes an annular water tank 16 disposed at an upper end of an outer wall of the slurry storage tank 11, a common wall, i.e., an upper end tank wall of the slurry storage tank 11, is disposed between the annular water tank 16 and the slurry storage tank 11, a bottom wall of the annular water tank 16 and a tank wall of the slurry storage tank 11 form a sliding fit, at least two piston cylinders 161 are disposed below the annular water tank 16 at even intervals along a circumferential direction of the slurry storage tank 11, cylinder bodies of the piston cylinders 161 are fixedly connected with the tank wall of the slurry storage tank 11, and piston rods of the piston cylinders 161 are connected with a bottom of the annular water tank 16. After the primary magnetic separation of the equipment is finished, the piston cylinder 161 jacks the annular water tank 16, so that water in the water tank can be rapidly poured into the slurry storage barrel 11, and the slurry storage barrel 11 is flushed.

Preferably, as shown in fig. 8, a first annular rail 2112 is arranged on the bottom surface of the first tray body 211, a first roller 213 which is in rolling fit with the first annular rail 2112 is arranged on the frame 210, and a plurality of first rollers 213 are uniformly arranged at intervals along the circumferential direction of the first tray body 211; a second annular rail 2122 is arranged on the bottom surface of the second tray 212, a second roller 214 which is in rolling fit with the second annular rail 2122 is arranged on the frame 210, and a plurality of second rollers 214 are uniformly arranged at intervals along the circumferential direction of the second tray 212; the frame 210 is provided with a driving mechanism for driving the first disc 211 and the second disc 212 to rotate simultaneously, the driving mechanism includes a first gear 215 and a second gear 216 arranged on the frame 210, an inner gear 2113 arranged at the bottom of the first disc 211 and an outer gear 2123 arranged at the bottom of the second disc 212, the first gear 215 is respectively engaged with the second gear 216 and the inner gear 2113, the second gear 216 is engaged with the outer gear 2123, the first gear 215 and the second gear 216 are uniformly arranged in multiple groups at intervals along the circumferential direction of the first disc 211 and the second disc 212, and at least one of the first gear 215 and the second gear 216 is connected with the driving motor 217. The invention adopts a driving element to simultaneously drive the two disc bodies to do unequal-speed circular motion, thereby ensuring the stability of the speed difference between the two disc bodies.

Preferably, the edge of the central hole and the edge of the outer annular surface of the first disk body 211 are provided with downward extending protection plates, and the protection plates can prevent slag and ore pulp from entering the inside of system equipment and influencing the running efficiency of the equipment. The bottom surface of the bucket body 22 is inclined, and the ore discharge port 221 is arranged at the lower side of the bottom surface to facilitate the aggregation of ore pulp.

Example 2

A quartz sand iron removal method comprises the following steps:

step 1: mixing quartz sand particles with water according to the weight part of 1:6-10, and fully stirring to prepare quartz sand slurry;

step 2: putting the quartz sand slurry into magnetic separation equipment, separating and removing iron in the slurry by the magnetic separation equipment, and collecting the slurry after iron removal from an ore discharge port 221 of the magnetic separation equipment;

and step 3: and (5) repeating the step (2) until no iron is discharged from a slag discharge port of the magnetic separation equipment.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. The magnetic separation equipment is characterized in that: the magnetic separation device comprises a slurry discharging device and a magnetic separation device, wherein the slurry discharging device is positioned above the magnetic separation device and comprises a slurry storage barrel, a slurry discharging port is formed in the bottom of the slurry storage barrel, a slurry discharging valve with adjustable opening degree is arranged at the slurry discharging port, a floating adjusting mechanism connected with the slurry discharging valve is arranged in the slurry storage barrel, and the floating adjusting mechanism is assembled to drive the opening degree of the slurry discharging valve to gradually increase in the process that the liquid level of slurry in the slurry storage barrel gradually decreases; the magnetic separation device comprises a magnetic separation disc and a barrel body, the magnetic separation disc comprises a first disc body and a second disc body which are coaxially arranged, the first disc body is positioned above the second disc body, through holes are formed in the centers of the first disc body and the second disc body, vortex-shaped baffles which are radially distributed are arranged on the disc surface of the first disc body at intervals along the circumferential direction, a spiral magnetic attraction unit is arranged on the disc surface of the second disc body, the spiral magnetic attraction unit is in sliding fit with the bottom surface of the first disc body, the first disc body and the second disc body are arranged on the rack in a rotating mode in the same direction, and the rotating speed of the first disc body is larger than that of the second disc body; the magnetic separation disc is arranged at the center of the barrel body, a slag discharge pipe aligned with the center of the magnetic separation disc is arranged at the center of the barrel body, the slag discharge pipe is arranged below the magnetic separation disc, the upper end of the slag discharge pipe is communicated with a central through hole of the magnetic separation disc, the slag discharge pipe penetrates through the bottom wall of the barrel body, and a slag discharge hole is formed in the side wall of the barrel body; the slurry discharging port is arranged right opposite to the center of the magnetic separation disc, the slurry discharging port is provided with a conical slurry guiding cover, the slurry guiding cover is used for dispersing slurry discharged from the slurry discharging port into a ring shape, and the diameter of the lower end of the conical slurry guiding cover is larger than that of the center hole of the magnetic separation disc.

2. The magnetic separation apparatus of claim 1, wherein: the slurry discharge valve comprises a valve core movably arranged along the vertical direction, and the valve core is in insertion fit with the upper end of the slurry discharge port; the floating adjusting mechanism comprises an elastic component and a floating component, wherein the elastic component is assembled to enable the elastic force of the elastic component to drive the valve core to be opened upwards, the floating component is assembled to enable the buoyancy of the floating component to be converted into the lower pressure applied to the valve core, and the lower pressure can be changed along with the height of the liquid level of the slurry, namely the higher the liquid level of the slurry is, the higher the lower the pressure is, and the lower the pressure is, the smaller the slurry level is.

3. The magnetic separation apparatus of claim 2, characterized in that: the elastic component comprises a vertical valve rod fixedly connected with the valve core, a mounting bracket is arranged in the slurry storage barrel, the valve rod is connected with the mounting bracket in a sliding manner, a pressure spring is arranged between the valve rod and the mounting bracket, and the pressure spring is assembled to enable the elastic force of the pressure spring to drive the valve rod to move upwards relative to the mounting bracket; the float assembly comprises a float and a connecting rod, the float is cylindrical, the float is in sliding connection with the mounting support along the vertical direction, a rod body of the connecting rod is in pivot joint with the mounting support, waist-shaped holes are formed in two ends of the connecting rod, one end of the connecting rod is in sliding pivot joint with a pin shaft arranged at the top end of the valve rod through the waist-shaped holes, and the other end of the connecting rod is in sliding pivot joint with a pin shaft arranged on a push rod at the upper end of the float through the waist-shaped holes; the floating components are provided with two groups and are symmetrically distributed on two sides of the elastic component.

4. The magnetic separation apparatus of claim 3 wherein: the slurry discharging valve also comprises a valve casing, the bottom of the slurry storage barrel is funnel-shaped, the slurry discharging port is a cylindrical structure vertically arranged at the bottom of the slurry storage barrel, the valve casing and the valve core are coaxially arranged with the slurry discharging port, the valve casing is arranged at intervals with the upper end of the slurry discharging port along the vertical direction, the diameter of the inner annular surface of the valve casing is consistent with that of the inner annular surface of the slurry discharging port, and the valve core is arranged between the valve casing and the slurry discharging port in a sliding manner; the upper end of the valve shell is connected with a vertical conduit, the valve rod penetrates through the vertical conduit, and the upper end of the vertical conduit is fixedly connected with a mounting bracket fixedly arranged in the pulp storage barrel; the lower end of the valve core is convexly provided with a connecting column, the lower end of the connecting column is provided with a conical slurry guide cover, and the slurry guide cover is used for dispersing slurry discharged from the slurry discharge port into a ring shape.

5. Magnetic separation apparatus according to claim 4, characterised in that: and a vertical threaded rod is arranged at the upper end of the valve rod at intervals and is in threaded connection with the mounting bracket, and a hand wheel is arranged at the upper end of the threaded rod.

6. The magnetic separation apparatus of claim 5, characterized in that: the annular water tank is arranged at the upper end of the outer wall of the slurry storage barrel, a shared wall is arranged between the annular water tank and the slurry storage barrel, namely the upper end barrel wall of the slurry storage barrel, the bottom wall of the annular water tank and the barrel wall of the slurry storage barrel form sliding fit, at least two piston cylinders are arranged below the annular water tank at intervals along the circumferential direction of the slurry storage barrel, the cylinder bodies of the piston cylinders are fixedly connected with the barrel wall of the slurry storage barrel, and the piston rods of the piston cylinders are connected with the bottom of the annular water tank in a blocking mode.

7. The magnetic separation apparatus of claim 6 wherein: a first annular rail is arranged on the bottom surface of the first tray body, a plurality of first rollers which are in rolling fit with the first annular rail are arranged on the rack, and the first rollers are uniformly arranged at intervals along the circumferential direction of the first tray body; the bottom surface of the second tray body is provided with a second annular track, the rack is provided with a second roller which is matched with the second annular track in a rolling manner, and the second roller is uniformly arranged along the circumferential direction of the second tray body at intervals.

8. The magnetic separation apparatus of claim 7, wherein: be equipped with in the frame and be used for driving first disk body and second disk body pivoted actuating mechanism simultaneously, actuating mechanism includes first gear, the second gear that sets up in the frame to and the outer ring gear of ring gear and the setting of second disk body bottom that first disk body bottom set up, first gear meshes with second gear and ring gear respectively, the second gear meshes with outer ring gear again, first gear and second gear set up the multiunit along the even interval in circumference of first disk body and second disk body, and at least one of them first gear or second gear link to each other with driving motor.

9. The magnetic separation apparatus of claim 8 wherein: and guard plates which extend downwards are arranged on the edge of the central hole and the edge of the outer ring surface of the first tray body.

10. The magnetic separation apparatus of claim 9 wherein: the bottom surface of the barrel body is inclined, and the ore discharge port is arranged at the lower side of the bottom surface.