CN217747473U

CN217747473U - Inverted cone magnetic separator

Info

Publication number: CN217747473U
Application number: CN202221711149.7U
Authority: CN
Inventors: 徐国印; 王普蓉
Original assignee: Panzhihua University
Current assignee: Panzhihua University
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-11-08
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses an inverted cone magnetic separator belongs to mineral processing equipment technical field. The ore pulp washing device comprises a conical outer sleeve (1), a conical inner sleeve (3), an ore feeding pipe (5) and an ore pulp washing water pipe (4), wherein the large end of the conical outer sleeve (1) is upward and fixedly arranged, and the conical inner sleeve (3) is arranged on the inner side of the conical outer sleeve (1) and can horizontally rotate; the ore feeding pipe (5) and the ore pulp flushing water pipe (4) are arranged above the conical inner sleeve (3), the outlet at the lower end of the conical outer sleeve (1) is provided with an ore receiving plate (8) along the radial direction, the outer side wall of the conical outer sleeve (1) is provided with a plurality of magnet blocks (2) at intervals, and the magnet blocks (2) are positioned below the ore feeding pipe (5). The device introduces centrifugal force in weak magnetic separation, can continuously produce, separates and discharges ores, and improves the recovery rate of small-particle magnetic minerals. The magnetic drum type magnetic separator solves the problems that the ore pulp of the existing magnetic drum type magnetic separator has large impact on the drum body, so that small-particle magnetic minerals cannot be adsorbed on the surface of the drum body, and the recovery rate is low.

Description

Inverted cone magnetic separator

Technical Field

The utility model discloses a back taper magnet separator belongs to mineral processing equipment technical field.

Background

Iron ore resources are abundant and widely distributed in the world. Iron deposits have been found to be distributed primarily in north america, south eastern america, as well as in australia, russia, canada, china, brazil, and the like. Wherein Australia is located first, canada is located second, russia is located third, and Brazil is located fourth.

Iron ore resources in China are distributed all over the country. In iron ore resources in China, lean ores occupy about 94.6% of the total inventory, and the lean ores can be utilized after being subjected to ore dressing. The composition of iron ore is relatively complex, for example, the iron ore contains symbiotic components such as vanadium, titanium, cobalt and the like. Iron ore contains a large amount of metal oxides such as silicate, silicon oxide, magnesium aluminum and the like, and if the impurities cannot be removed in magnetic separation, the quality of iron ore concentrate is directly influenced, so that high-quality iron ore concentrate with low iron grade and low impurities is difficult to obtain.

The existing magnetic separation mainly adopts a cylindrical magnetic separator for magnetite separation, magnetic weighting medium recovery and preparation for wet-type strong magnetic separation feeding. The main structure is as follows: cylinder, magnetic system, sorting tank and feeding, discharging and overflow mechanism. The small cylinder diameter is 3-pole magnetic system, the large cylinder diameter is more than 750mm, and 4-pole to 6-pole magnetic system is adopted. The polarity alternates along the peripheral direction, and the polarity is the same along the axial direction; the wrap angle of the magnetic system is 106-135 degrees. The magnetic system adopts a strontium ferrite permanent magnet, and can generate the highest magnetic field strength under the given special magnetic field distribution condition. The groove body working in the magnetic field is made of austenitic stainless steel, and the surface of the groove body is made of synthetic material wear-resistant rubber to prevent abrasion.

According to the difference of the groove structure form, the wet type cylinder magnetic separator has three groove structure forms: forward flow, reverse flow and semi-reverse flow.

The ore feeding pulp of the cylindrical magnetic separator enters the separation space from the lower part of the groove body in a loose suspension state, and the movement direction of the pulp is basically the same as the direction of magnetic field force, so that ore particles can reach the surface of the cylinder with high magnetic field force. In addition, tailings are discharged from tailing holes on the bottom plate, so that the height of the overflow surface can keep the pulp level in the tank body. The above two characteristics determine that the semi-countercurrent magnetic separator can obtain higher concentrate quality and metal recovery rate. Therefore, the method is widely used for the rough concentration and the fine concentration operation of processing the ferromagnetic ore with the fine particle less than 0.2 mm. The magnetic separator can be used by connecting a plurality of magnetic separators in series, so that the concentrate grade is improved.

The disadvantages are as follows: the ore pulp impacts the surface of the cylinder and is adsorbed on the surface of the cylinder under the action of magnetic force, but the small-particle magnetic mineral is impacted down or does not contact the surface of the cylinder due to too large or too small impact force. Both result in a large loss of recovery and also result in the inclusion of a large amount of gangue affecting the iron concentrate grade.

The domestic patent (application number: 201721602717.9) discloses a centrifugal concentrator, which fixes magnetic substances on a rotating shaft through a mesh groove, wherein the magnetic substances mainly adsorb impurities containing magnetism to improve the content of concentrate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that current magnetism section of thick bamboo formula magnet separator ore pulp strikes the barrel great, leads to tiny particle magnetic mineral can not adsorb on the barrel surface, causes the rate of recovery to hang down.

The utility model provides a technical scheme that its technical problem adopted is: the inverted cone magnetic separator comprises a cone outer sleeve, a cone inner sleeve, an ore feeding pipe and an ore pulp flushing water pipe, wherein the large end of the cone outer sleeve is upwards and fixedly arranged, the cone inner sleeve is arranged on the inner side of the cone outer sleeve at intervals, and the cone inner sleeve can horizontally rotate; the ore feeding pipe and the ore pulp flushing pipe are arranged above the conical inner sleeve, the ore receiving plate is arranged at the outlet of the lower end of the conical outer sleeve along the radial direction, a plurality of magnet blocks are arranged on the outer side wall of the conical outer sleeve at intervals, and the magnet blocks are positioned below the ore feeding pipe.

Wherein, the cone angle of the conical inner sleeve in the device is 5 to 180 degrees.

The device further comprises a concentrate flushing pipe, wherein the concentrate flushing pipe is arranged above the conical inner sleeve and is positioned on the right side opposite to the ore pulp flushing pipe.

Furthermore, the concentrate flushing pipe in the device is of an arc-shaped pipe structure, a plurality of through holes are arranged on the pipe wall at intervals, and outlets of the through holes face to the inner wall of the conical inner sleeve on the same side.

Wherein, in the device, the ore receiving plate is connected with the inner wall of the outlet at the lower end of the conical outer sleeve in a sliding way.

The ore pulp flushing water pipe in the device is of an arc-shaped pipe structure, a plurality of through holes are formed in the pipe wall at intervals, and outlets of the through holes face the inner wall of the conical inner sleeve on the same side.

Wherein, the inner wall of the conical inner sleeve in the device is provided with a concave-convex surface structure.

Furthermore, in the device, grooves with spiral structures are arranged on the inner wall of the conical inner sleeve at intervals.

Furthermore, the depth of the grooves on the inner wall of the conical inner sleeve in the device is reduced from top to bottom in sequence.

The device further comprises a rotating driving piece, a rotating connecting piece is arranged at the upper end of the conical inner sleeve, and the rotating driving piece is connected with the rotating connecting piece, so that the rotating driving piece drives the conical inner sleeve to rotate.

The utility model has the advantages that: the device has the advantages of simple structure, few moving parts, stable work and low energy consumption, particularly introduces centrifugal force in weak magnetic separation, can continuously produce, separates and discharges ores, and greatly improves the magnetic separation efficiency and the recovery rate of small-particle minerals. Under the condition of the same treatment capacity, compared with a cylindrical magnetic separator and a conical separator, the magnetic separator has a better ore pulp and magnetic force contact surface, so that magnetic minerals caught by magnetic force in the magnetic separation obtain more rolling actions, the inclusion of gangue is reduced, and the grade of iron ore concentrate is improved. During the separation of specific minerals, inclined straight lines or circular ring-shaped notches with certain depth can be added on the surface of the cone according to the specific gravity difference between the minerals and the gangue, so that the rolling degree of the minerals and the gangue minerals is improved, and the mineral enrichment ratio is improved.

Drawings

Fig. 1 is a schematic view of the cross-sectional structure of the present invention.

Fig. 2 is a schematic view of the structure of the present invention with a rotary driving member.

Fig. 3 is a schematic view of the top view structure of the present invention.

Labeled in the figure as: the device comprises a conical outer sleeve 1, a magnet block 2, a conical inner sleeve 3, an ore pulp flushing water pipe 4, an ore feeding pipe 5, a concentrate flushing pipe 6, a rotary connecting piece 7, an ore receiving plate 8 and a rotary driving piece 9.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 3, the inverted cone magnetic separator of the present invention comprises a conical outer sleeve 1, a conical inner sleeve 3, an ore feeding pipe 5 and an ore pulp washing water pipe 4, wherein the large end of the conical outer sleeve 1 is upward and fixedly arranged, the conical inner sleeve 3 is arranged at the inner side of the conical outer sleeve 1 at intervals, and the conical inner sleeve 3 can horizontally rotate; the ore feeding pipe 5 and the ore pulp flushing pipe 4 are arranged above the conical inner sleeve 3, the ore receiving plate 8 is arranged at the outlet of the lower end of the conical outer sleeve 1 along the radial direction, a plurality of magnet blocks 2 are arranged on the outer side wall of the conical outer sleeve 1 at intervals, and the magnet blocks 2 are positioned below the ore feeding pipe 5. As can be understood by those skilled in the art, the device mainly comprises a conical outer sleeve 1, a conical inner sleeve 3, an ore feeding pipe 5 and an ore pulp flushing water pipe 4, wherein the large end of the conical outer sleeve 1 is upwards and fixedly arranged, and the conical outer sleeve 1 is kept fixed. The inner conical sleeve 3 is arranged on the inner side of the outer conical sleeve 1 at intervals, the inner conical sleeve 3 can horizontally rotate, the inner conical sleeve 3 can be actually supported by the rack and is rotatably connected with the rack, and the inner conical sleeve 3 is driven to rotate by a motor and a belt. An ore feeding pipe 5 and an ore pulp flushing water pipe 4 are arranged above the conical inner sleeve 3 and are mainly used for feeding and realizing the rolling of minerals. And an ore receiving plate 8 is arranged at the outlet of the lower end of the conical outer sleeve 1 along the radial direction, so that the outlet of the ore receiving plate 8 is divided into a concentrate hole and a tailing hole, preferably, the ore receiving plate 8 is arranged vertically to the axial space of the ore feeding pipe 5, the tailing hole is arranged on the side close to the ore feeding pipe 5, and the concentrate hole is arranged on the side close to the concentrate flushing pipe 6. Preferably, a plurality of magnet blocks 2 are arranged on the outer side wall of the conical outer sleeve 1 at intervals, the magnet blocks 2 are positioned below the ore feeding pipe 5, the magnet blocks 2 are used for realizing the adsorption of minerals, the magnet blocks 2 are actually arranged in a plurality of pieces, the ore feeding pipe 5 is of a tubular structure, and the magnet blocks 2 are preferably positioned on the inner wall of the ore receiving plate 8 close to the ore feeding pipe 5 and are positioned right below the ore feeding pipe. The actual screening of the device is that ground ore pulp with certain concentration is fed onto the inner wall of the left side of the upper conical inner sleeve 3 through the ore feeding pipe 5, then spraying washing water is fed through the ore pulp washing water pipe 4, and due to the fact that the conical inner sleeve 3 has a certain inclination angle, under the combined action of centrifugal force, gravity, magnetic force and washing water, minerals and gangue in the ore pulp roll downwards along the cone and continue to roll under the pushing of subsequent ore pulp. Due to specific gravity and magnetic difference, the magnetic mineral is gradually attached to the inner wall of the conical inner sleeve 3 during rolling, attached to the inner wall of the conical inner sleeve 3 under the action of resisting subsequent ore pulp impact under the action of friction force, separated from the magnetic field on the surface of the conical outer sleeve 1 under the rotation of the conical inner sleeve 3, and taken to the right side to be discharged to become concentrate; the gangue minerals with smaller specific gravity and magnetism are easily washed down by washing water because the friction force between the gangue mineral layer and the mineral layer is small and the magnetic force is small, and finally the gangue minerals are impacted to a tailing tank by subsequent ore pulp to be discharged to tailings.

Preferably, the taper angle of the conical inner sleeve 3 in the device is 5-180 degrees. As can be understood by those skilled in the art, the device preferably has a cone angle of 5 to 180 degrees in the inner conical sleeve 3, and controls the component force of the ore pulp on the side wall of the outer conical sleeve 1, so as to control the falling speed of the ore pulp. It may in fact be preferred that the cone angle of the conical outer jacket 3 is 30 to 150.

Preferably, the device also comprises a concentrate flushing pipe 6, wherein the concentrate flushing pipe 6 is arranged above the conical inner sleeve 3 and is positioned at the right opposite side of the pulp flushing water pipe 4. As can be understood by those skilled in the art, the concentrate flushing pipe 6 mainly functions to separate and screen the concentrate from the side wall of the conical inner sleeve 3 through flushing water, so that in order to facilitate concentrate discharge, the concentrate flushing pipe 6 is preferably arranged on the opposite side of the pulp flushing pipe 4, so that the flushing water from the concentrate flushing pipe 6 directly acts on the concentrate on the surface of the conical inner sleeve 3, and the concentrate discharge is realized under the action of centrifugal force.

Preferably, the concentrate flushing pipe 6 in the device is an arc pipe structure, a plurality of through holes are arranged on the pipe wall at intervals, and the outlets of the through holes face the inner wall of the conical inner sleeve 3 at the same side. The technical staff in the field can understand that this device is the arc tubular construction of the ore concentrate flushing pipe 6 of further preferred only, and the interval is provided with a plurality of through-holes on the pipe wall of ore concentrate flushing pipe 6, and the through-hole export realizes washing screening of ore pulp towards the circular cone endotheca 3 inner wall of homonymy for wash water intake is more even avoids wash water direct impact ore pulp to cause the ore concentrate to drop to the tailing mouth.

Preferably, in the device, the ore receiving plate 8 is in sliding connection with the inner wall of the outlet at the lower end of the conical outer sleeve 1. As can be understood by those skilled in the art, in order to adjust the yield of the concentrate and the tailings conveniently, the device preferably has the ore receiving plate 8 in sliding connection with the inner wall of the lower outlet of the conical outer sleeve 1, and the size of the concentrate opening and the tailing opening can be controlled by actually moving the ore receiving plate 8 to different positions.

Preferably, in the device, the ore pulp flushing water pipe 4 is of an arc pipe structure, a plurality of through holes are arranged on the pipe wall at intervals, and the outlets of the through holes face the inner wall of the conical inner sleeve 3 at the same side. As can be understood by those skilled in the art, in order to make the washing water more uniform, the device preferably arranges the ore pulp washing water pipe 4 into an arc pipe structure, and a plurality of through holes are arranged on the pipe wall at intervals, and the outlets of the through holes face the inner wall of the conical inner sleeve 3 at the same side.

Preferably, in the device, the inner wall of the conical inner sleeve 3 is of a concave-convex surface structure. As can be understood by those skilled in the art, the ore pulp directly contacts with the side wall of the conical inner sleeve 3 and slides down along the side wall. In order to increase the friction force, the inner wall of the conical inner sleeve 3 is preferably in a concave-convex structure. The purpose that the inner wall of the conical inner sleeve 3 is a concave-convex surface can be realized by spraying paint actually.

Preferably, in the device, grooves with a spiral structure are arranged on the inner wall of the conical inner sleeve 3 at intervals. As can be understood by those skilled in the art, in order to increase the friction force between the minerals and the conical inner sleeve 3, realize the screening of small-particle minerals and improve the rolling degree of the minerals and gangue minerals, the device preferably has grooves with spiral structures at intervals on the inner wall of the conical inner sleeve 3.

Preferably, the depth of the grooves on the inner wall of the conical inner sleeve 3 in the device is reduced from top to bottom in sequence. It will be appreciated by those skilled in the art that the main function of the grooves is to increase the friction between the concentrate and the conical inner sleeve 3, so that part of the concentrate will be stored in the grooves, and the concentrate will fall down along the grooves under the action of gravity. Actually in order to make things convenient for the sparge water to take the concentrate out, the preferred recess 8 degree of depth of this device reduces from top to bottom in proper order, is convenient for the row of concentrate to clean.

Preferably, the device further comprises a rotary driving member 9, a rotary connecting member 7 is arranged at the upper end of the conical inner sleeve 3, and the rotary driving member 9 is connected with the rotary connecting member 7, so that the rotary driving member 9 drives the conical inner sleeve 3 to rotate. As can be understood by those skilled in the art, in order to facilitate the driving of the conical inner sleeve 3, the device preferably further includes a rotation driving member 9, the upper end of the conical inner sleeve 3 is actually provided with a rotation connecting member 7, and the conical inner sleeve 3 can be rotatably disposed on the rack, so that the conical inner sleeve 3 can rotate in the horizontal direction, and the rotation driving member 9 is connected to the rotation connecting member 7, so that the rotation driving member 9 drives the conical inner sleeve 3 to rotate, and preferably, the rotation driving member 9 is a motor with a speed reducer, and the rotation connecting member 7 is a belt pulley, and the rotation driving member and the belt pulley are connected to realize the rotation of the conical inner sleeve 3.

Claims

1. Back taper magnet separator, its characterized in that: the ore feeding device comprises a conical outer sleeve (1), a conical inner sleeve (3), an ore feeding pipe (5) and an ore pulp flushing water pipe (4), wherein the large end of the conical outer sleeve (1) is upward and fixedly arranged, the conical inner sleeve (3) is arranged on the inner side of the conical outer sleeve (1) at intervals, and the conical inner sleeve (3) can horizontally rotate; the ore feeding pipe (5) and the ore pulp flushing water pipe (4) are arranged above the conical inner sleeve (3), the outlet at the lower end of the conical outer sleeve (1) is provided with an ore receiving plate (8) along the radial direction, the outer side wall of the conical outer sleeve (1) is provided with a plurality of magnet blocks (2) at intervals, and the magnet blocks (2) are positioned below the ore feeding pipe (5).

2. The inverted cone magnetic separator as set forth in claim 1, wherein: the cone angle of the conical inner sleeve (3) is 5-180 degrees.

3. The inverted cone magnetic separator as set forth in claim 1, wherein: the ore pulp washing device is characterized by further comprising an ore pulp washing pipe (6), wherein the ore pulp washing pipe (6) is arranged above the conical inner sleeve (3) and is located on the right opposite side of the ore pulp washing pipe (4).

4. The inverted cone magnetic separator as set forth in claim 3, characterized in that: the concentrate flushing pipe (6) is of an arc-shaped pipe structure, a plurality of through holes are formed in the pipe wall at intervals, and outlets of the through holes face the inner wall of the conical inner sleeve (3) on the same side.

5. The inverted cone magnetic separator as set forth in claim 1, wherein: the ore receiving plate (8) is connected with the inner wall of the outlet at the lower end of the conical outer sleeve (1) in a sliding manner.

6. The inverted cone magnetic separator as set forth in claim 1, wherein: the ore pulp flushing water pipe (4) is of an arc-shaped pipe structure, a plurality of through holes are formed in the pipe wall at intervals, and the outlets of the through holes face the inner wall of the conical inner sleeve (3) on the same side.

7. The inverted cone magnetic separator as set forth in claim 1, wherein: the inner wall of the conical inner sleeve (3) is of a concave-convex structure.

8. The inverted cone magnetic separator defined in claim 7 wherein: the inner wall of the conical inner sleeve (3) is provided with grooves with spiral structures at intervals.

9. The inverted cone magnetic separator defined in claim 8 wherein: the depth of the grooves on the inner wall of the conical inner sleeve (3) is reduced from top to bottom in sequence.

10. The inverted cone magnetic separator as set forth in claim 1, characterized in that: the rotary driving device is characterized by further comprising a rotary driving piece (9), wherein a rotary connecting piece (7) is arranged at the upper end of the conical inner sleeve (3), and the rotary driving piece (9) is connected with the rotary connecting piece (7) so that the rotary driving piece (9) drives the conical inner sleeve (3) to rotate.