CN216173206U - Dry type classificator - Google Patents

Abstract

The utility model provides a dry concentrator, comprising: a positive air blowing path and an eccentric magnetic roller mechanism; the eccentric magnetic roller mechanism is partially arranged in the positive air blowing path, the positive air blowing path is used for blowing positive air in the same direction as the material conveying direction to the surface of the eccentric magnetic roller mechanism, and the eccentric magnetic roller mechanism is used for conveying materials and providing an eccentric rotating magnetic field; a feeding area is arranged above the eccentric magnetic roller mechanism; and a tailing treatment mechanism and a concentrate area are arranged below the eccentric magnetic roller mechanism. The utility model provides a multi-physical-field coupled complex separation environment for dry magnetic separation of ultrafine materials, wherein the materials are mainly subjected to the multi-force composite action of gravity, centrifugal force, magnetic overturning force, forward wind force, magnetic field suction and the like, so that the aims of grading, high-efficiency and fine separation are fulfilled, and the problem that dry ultrafine powdery materials after dry grinding and grading cannot be effectively subjected to dry separation is solved.

Description

Dry type classificator

Technical Field

The utility model relates to the technical field of magnetic separation, in particular to a dry type fine separator.

Background

Along with the continuous and rapid development of economy in China, the demand of raw materials is continuously high, iron ore is used as one of main raw materials in the steel industry, and the mineral separation process is continuously innovated and updated through processes and equipment for many years, so that the mineral separation process is greatly improved. However, the progress of the iron ore beneficiation process and equipment is generally based on wet beneficiation, for example, the iron ore beneficiation stage generally adopts a wet magnetic separation process. In some water-deficient areas where mine resources are located, such as water-deficient areas of Xinjiang, Nemeng, Iran, Chilean and the like, ore dressing plants generally adopt dry roughing of iron ore and then transport dry concentrate to remote water-deficient areas for wet grinding and fine dressing, so that the transportation cost is increased. If the haul is far away or the site is exposed to no water available, the mine resources may not be available.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a dry type fine separator, which aims to solve the problem that the wet type magnetic separation process adopted in the existing iron ore fine separation stage needs to be transported to a water-containing area to increase the transportation cost or cannot be used for fine separation.

The utility model provides a dry type concentrator, comprising: a positive air blowing path and an eccentric magnetic roller mechanism; the eccentric magnetic roller mechanism is partially arranged in the positive air blowing path, the positive air blowing path is used for blowing positive air in the same direction as the material conveying direction to the surface of the eccentric magnetic roller mechanism, and the eccentric magnetic roller mechanism is used for conveying materials and providing an eccentric rotating magnetic field; a feeding area is arranged above the eccentric magnetic roller mechanism; a tailing treatment mechanism and a concentrate area are arranged below the eccentric magnetic roller mechanism; under the conveying effect of eccentric magnetism rolls the mechanism, the material in pan feeding district is carried extremely just blow the way and carry out the motion of rolling, so that the material is in the surface layering that the mechanism was rolled to eccentric magnetism for strong magnetic material arranges at the inlayer, and weak magnetic material arranges at the middle level, and non-magnetic material arranges at outermost, and outermost non-magnetic material leaves under the effect of just blowing the wind way the surface that the mechanism was rolled to eccentric magnetism blows in to the tailing processing mechanism along with wind in, through tailing processing mechanism subsides the processing to non-magnetic material, realizes the collection of non-magnetic material, and magnetic material is in the magnetic field and the conveying effect of eccentric magnetism roll the mechanism enter into concentrate district in proper order down.

Further, in the above dry separator, the eccentric magnetic roller mechanism includes: a magnetic drum and an eccentric magnetic system; the magnetic roller is connected with a roller driving piece and used for driving the magnetic roller to rotate so as to convey materials on the surface of the magnetic roller and convey the materials into the positive air blowing path; the eccentric magnetic system is eccentrically arranged in the magnetic roller, a magnetic separation area and an ore unloading area are formed on the surface of the magnetic roller, and the magnetic separation area is arranged at the separation area of the positive air blowing path so that materials can be rolled and non-magnetic materials can be separated under the action of a magnetic field and wind force; the eccentric magnetic system is rotatably arranged in the magnetic roller so as to enable the materials on the surface of the magnetic roller to carry out rolling motion under the action of a rotating magnetic field.

Further, in the dry type fine separator, the eccentric magnetic system is connected with a magnetic system driving member for driving the eccentric magnetic system to rotate.

Further, in the above dry separator, the eccentric magnetic system and the magnetic drum rotate in opposite directions.

Further, in the dry-type fine separator, a material distributing plate is arranged on one side of the positive air blowing path below the eccentric magnetic roller mechanism, and a plurality of blanking areas are formed on one side of an air outlet of the positive air blowing path in an isolating mode and used for isolating different magnetic materials.

Further, in the dry type concentration machine, a concentrate guide plate is arranged on one side of the material distributing plate right above the concentrate area and used for guiding the falling magnetic materials; and an outlet adjusting plate is arranged on the other side of the material distributing plate and right above the tailing processing mechanism, is rotatably connected to the material distributing plate and is used for adjusting the size of a discharge port of an air outlet discharge area formed between the material distributing plate and the positive blowing path so as to adjust the grade of the sorted materials.

Further, in the above dry separator, the tailings disposal mechanism comprises: a gravity settling chamber and a airlock valve; the gravity settling chamber can be arranged below the positive blowing path, the air locking valve is connected with the gravity settling chamber, the air locking valve is used for locking air of the gravity settling chamber and discharging materials, the gravity settling chamber is used for receiving air carrying nonmagnetic materials and performing sedimentation treatment on the nonmagnetic materials, so that the nonmagnetic materials are discharged into the air locking valve, and the nonmagnetic materials are discharged through the air locking valve.

Further, in the dry-type fine separator, the gravity settling chamber is provided with a settling area, and a feeding air inlet area, a discharging area and an air outlet discharging area which are communicated with the settling area.

Further, in the above dry separator, the airlock valve comprises: the wind locking barrel and the impeller shaft; wherein, the air locking cylinder is provided with a feed inlet and a discharge outlet; the impeller shaft is rotatably arranged inside the air locking cylinder along the axial direction of the air locking cylinder, and an impeller is arranged on the impeller shaft and used for rotating along with the impeller shaft so as to drive materials from the feed inlet to the discharge outlet.

Furthermore, in the dry type concentrator, a cleaning brush and/or a cleaning scraper which are positioned at the periphery of the eccentric magnetic roller mechanism are arranged outside the positive air blowing path and are used for cleaning materials attached to the surface of the eccentric magnetic roller mechanism.

According to the dry type classificator provided by the utility model, under the conveying action of the eccentric magnetic roller mechanism, materials in the feeding area are conveyed into the positive air blowing path and perform rolling motion, so that the materials are layered on the surface of the eccentric magnetic roller mechanism, magnetic materials are distributed on the innermost layer, and non-magnetic materials are distributed on the outermost layer; the non-magnetic fine powdery material on the outermost layer is small in particle and small in centrifugal force and is difficult to separate from the material layer in time, so that under the action of positive high-speed wind in a positive blowing wind path, namely the positive blowing wind, part of the non-magnetic fine powdery material on the outermost layer can be brought up to move downwards along with the high-speed wind, most of the non-magnetic fine powdery material can leave the surface of the eccentric magnetic rolling mechanism under the action of the wind and is fully distributed in the space of the wind path, the non-magnetic fine powdery material in the wind path is taken away along with the high-speed wind and falls into a tailing treatment mechanism, and the tailing treatment mechanism performs sedimentation treatment on tailings to realize the collection and output of the tailings; the magnetic material concentrate falls to a concentrate area along with the rotation of the eccentric magnetic roller mechanism and the reduction of the magnetic field, so that the superfine material is classified, efficiently and finely separated.

The dry type fine separator provides a complex separation environment with coupling of multiple physical fields for dry type magnetic separation of superfine materials, the materials are mainly subjected to the multi-force composite action of gravity, centrifugal force, magnetic overturning force, forward wind force, magnetic field suction force and the like, so that the purposes of classification type, high efficiency and fine separation are achieved, the problem that dry type ultrafine powdery materials after dry grinding classification cannot be effectively subjected to dry type separation is solved, and technical feasibility is provided for fully utilizing iron ore resources in water-deficient areas.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a dry pre-selector according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a dry pre-selector according to an embodiment of the present invention;

fig. 3 is a front view of a reverse blowing air path according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a side view of an eccentric magnetic roller mechanism provided by an embodiment of the present invention;

FIG. 6 is a top view of an eccentric magnetic roller mechanism provided in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view taken at B-B of FIG. 6;

FIG. 8 is a left side view of a gravity settling chamber provided by an embodiment of the present invention;

FIG. 9 is a cross-sectional view taken at E-E of FIG. 8;

FIG. 10 is a front sectional view of a latch valve according to an embodiment of the present invention;

fig. 11 is a cross-sectional view at F-F in fig. 10.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1-2, schematic structural diagrams of a dry concentrator provided by an embodiment of the utility model are shown. As shown, the dry concentrator includes: a positive air blowing path 1, an eccentric magnetic roller mechanism 2 and a frame body 3; wherein the content of the first and second substances,

with continued reference to fig. 1, the frame body 3 plays a supporting role to support the eccentric magnetic roller mechanism 2, the normal blowing path 1, and the like.

With continued reference to fig. 1 and 2, the eccentric magnetic roller mechanism 2 is partially arranged in the positive air blowing path 1, and the positive air blowing path 1 is used for blowing positive air in the same direction as the material conveying direction to the surface of the eccentric magnetic roller mechanism 2; the eccentric magnetic roller mechanism 2 is used for conveying materials and providing an eccentric rotating magnetic field. Specifically, the positive air blowing path 1 may be vertically disposed to provide a vertical downward blowing positive air. The eccentric magnetic roller mechanism 2 can be partially arranged in the positive air blowing path 1, and the eccentric magnetic roller mechanism 2 and the positive air blowing path 1 form a sorting area for sorting materials so as to realize the separation of the materials; the eccentric magnetic rolling mechanism 2 can enable materials to be conveyed along the surface of the eccentric magnetic rolling mechanism 2, the materials are conveyed to the positive air blowing path 1, the eccentric magnetic rolling mechanism 2 can also provide an eccentric rotating magnetic field, the materials can be rolled and can be adsorbed on the surface of the eccentric magnetic rolling mechanism 2 to be conveyed along the rotating rolling surface of the eccentric magnetic rolling mechanism 2, and the magnetic materials are prevented from falling vertically under the action of gravity. In this embodiment, eccentric magnetism rolls mechanism 2 and can realize the transport of material, and can provide the rotating magnetic field that surface strength differs and can form weak magnetic field district and strong magnetic field district, so that the material rolls mechanism 2 and is located the strong magnetic field department of just blowing way 1 and carries out high-speed upset in order to realize the layering at eccentric magnetism, and can make the non-magnetic material leave eccentric magnetism and roll mechanism 2 surfaces under the effect of just blowing, can realize the absorption of magnetic material under the effect in magnetic field, and realize the whereabouts of magnetic material under the magnetic field intensity change effect, realize the sorting of material promptly. The blowing direction provided by the positive blowing path 1 is the same as the conveying direction of the materials, namely the blowing direction is from top to bottom, the materials are conveyed downwards under the conveying action of gravity and the eccentric magnetic roller mechanism 2, of course, the blowing direction provided by the positive blowing path 1 can also be an inclined direction, and only a component which is vertically downward, namely the same as the conveying direction of the materials is required to be provided; in order to avoid the heat generation of the forward blowing path 1 during the use process, the forward blowing path 1 may be a non-metal air path, that is, the outer plate surrounding the forward blowing path 1 may be non-metal materials such as glass fiber reinforced plastic, polyvinyl chloride, and polyvinyl chloride propylene, so as to avoid the material from generating eddy current, and further avoid the heat generation of the forward blowing path 1; in order to prolong the service life of the forward air-blowing path 1, preferably, the inner wall of the forward air-blowing path 1 may be provided with a wear-resistant sheet, especially at a position contacting with the material, the wear-resistant sheet may be a wear-resistant ceramic sheet, or may be another wear-resistant sheet, which is not limited in this embodiment.

With continued reference to fig. 1 and 2, a feeding area 4 is disposed above the eccentric magnetic roller mechanism 2, and the feeding area 4 may be supported by the frame body 3 for receiving the material, so that the material is conveyed from the feeding area 4 to the surface of the eccentric magnetic roller mechanism 2 under the action of gravity. Specifically, the feeding area 4 may be disposed at one side (right side as shown in fig. 1) of an air inlet of the forward blowing path 1, so that the material falls onto the surface of the eccentric magnetic roller mechanism 2 through the feeding area 4 under the action of gravity and is conveyed into the forward blowing path 1 under the rolling action of the eccentric magnetic roller mechanism 2, and the feeding area 4 and the forward blowing path 1 may share a middle partition plate. In the embodiment, a feeding port (an upper end as shown in fig. 1) of the feeding area 4 can be connected with an external feeding machine so as to realize the input of the materials; in order to buffer the input of the materials, preferably, a feeding slide carriage 41 is arranged at the feeding area 4 and is used for buffering the materials input into the feeding area 4; the feeding slide carriage 41 can be obliquely arranged on the inner wall of the feeding area 4 so as to guide and buffer materials, and the materials fall into the surface of the eccentric magnetic roller mechanism 2 after being buffered; preferably, the feed chute 41 is rotatably connected to the inner wall of the feed zone 4 to adjust its buffer angle. In order to avoid heating of the feeding area 4 during use, preferably, the feeding area 4 can be a non-metal feeding area, that is, the external plate surrounding the feeding area 4 can be made of non-metal materials such as glass fiber reinforced plastic, polyvinyl chloride, and polyvinyl chloride propylene, so as to avoid eddy current generated by the materials and further avoid heating of the feeding area 4; in order to prolong the service life of the feeding area 4, preferably, the inner wall of the feeding area 4 may be provided with a wear-resistant sheet, especially at a position contacting with the material, the wear-resistant sheet may be a wear-resistant ceramic sheet or other wear-resistant sheets, and in this embodiment, no limitation is imposed on the wear-resistant sheet. The material particle size may be about 0-100 mesh to 500 mesh, or other materials, which is not limited in this embodiment.

With continued reference to fig. 1 and 2, a tailing treatment mechanism 5 and a concentrate area 6 are arranged below the eccentric magnetic rolling mechanism 2, and both can be supported by the frame body 3, so that nonmagnetic materials in the materials fall into the tailing treatment mechanism 5 along with wind to perform sedimentation treatment on tailings, and the collection and output of the tailings are realized; wherein the magnetic material falls into the concentrate zone 6 as concentrate. Specifically, the tailing processing mechanisms 5 and the concentrate area 6 can be sequentially arranged from left to right, the arrangement position of the tailing processing mechanisms 5 is matched with the position of the positive air blowing path 1, and the tailing processing mechanisms can be arranged right below the positive air blowing path 1 so as to receive nonmagnetic materials blown out by positive air blowing of the positive air blowing path 1; the arrangement position of the concentrate area 6 is matched with the magnetic field intensity distribution of the eccentric magnetic rolling mechanism 2, as shown in fig. 1, the concentrate area 6 is arranged on the right side of the tailing processing mechanism 5, namely the magnetic field intensity of the surface of the eccentric magnetic rolling mechanism 2 right above the concentrate area 6 is smaller than the magnetic field intensity of the surface of the eccentric magnetic rolling mechanism 2 right above the tailing processing mechanism 5, so that magnetic materials can be conveyed to the concentrate area 6 under the action of the magnetic field suction force of the surface of the eccentric magnetic rolling mechanism 2, and the magnetic materials can fall into the concentrate area 6 due to the reduction of the magnetic field suction force.

Continuing to refer to fig. 2, under the conveying action of the eccentric magnetic roller mechanism 2, the material in the feeding area 4 is conveyed into the positive blowing path 1 and rolls; when the materials roll, the materials can be automatically layered on the surface of the eccentric magnetic rolling mechanism 2, so that the magnetic materials are arranged on the innermost layer, and the non-magnetic materials are arranged on the outermost layer; the non-magnetic fine powdery material at the outermost layer is small in particles and small in centrifugal force and is difficult to separate from the material layer in time, so under the action of positive high-speed wind, namely positive wind, in the positive wind blowing path 1, the non-magnetic fine powdery material at the outermost layer is partially brought up to move downwards along with the high-speed wind, most of the fine powdery non-magnetic material leaves the surface of the eccentric magnetic roller mechanism 2 under the action of the wind and is fully distributed in the space of the wind path, the fine powdery non-magnetic material in the wind path is brought away along with the high-speed wind and falls into the tailing treatment mechanism 5, and the tailing treatment mechanism 5 carries out sedimentation treatment on tailings, so that the collection and output of the tailings are realized; the magnetic material concentrate falls to a concentrate area 6 along with the rotation of the eccentric magnetic roller mechanism 2 and the reduction of the magnetic field, so that the superfine crushed material is classified, efficiently and finely separated. As shown in fig. 2, the square marks in the material represent non-magnetic material, and the triangular marks represent magnetic material.

With continued reference to fig. 1 and 2, a cleaning brush 7 and/or a cleaning scraper 8 located at the periphery of the eccentric magnetic roller mechanism 2 is/are arranged outside the positive air blowing path 1 for cleaning the materials attached to the surface of the eccentric magnetic roller mechanism 2. Specifically, the cleaning brush 7 and/or the cleaning scraper 8 can be supported on the frame body 3 through a support frame, and the cleaning brush 7 and the cleaning scraper 8 can be arranged in the weak magnetic field area of the eccentric magnetic roller mechanism 2, so that the materials attached to the surface of the eccentric magnetic roller mechanism 2 can be cleaned after the materials are sorted; in this embodiment, when the eccentric magnetic roller mechanism 2 conveys materials counterclockwise, the cleaning brush 7 and the cleaning scraper 8 are arranged in the weak magnetic area on the right side, and the cleaning scraper 8 is arranged below the cleaning brush 7, so that the materials are scraped first and then cleaned, and the cleaning effect of the materials is ensured. In order to adjust the cleaning gap, it is preferable that the gap between the cleaning brush 7 and the cleaning blade 8 and the eccentric magnetic roller mechanism 2 is adjustable, for example, the cleaning brush 7 and the cleaning blade 8 may be connected to a support frame via a telescopic plate to clean a small amount of materials attached to the surface of the eccentric magnetic roller mechanism 2. In this embodiment, the cleaning brush 7 may be made of nylon, and the cleaning blade 8 may be made of rubber or polyurethane.

In the present embodiment, as shown in fig. 1 and 2, a material separating plate 10 is disposed below the eccentric magnetic roller mechanism 2 on one side (right side as shown in fig. 1) of the forward air-blowing path 1, and a plurality of material discharging areas are formed on one side of the air inlet (lower end as shown in fig. 1) of the forward air-blowing path 1 for separating different magnetic materials. Specifically, the material distributing plate 10 may be disposed on the frame body 3 so as to divide the right side of the positive blowing path 1 below the eccentric magnetic roller mechanism 2; in this embodiment, there is one material distributing plate 10 to isolate two blanking areas, where the two blanking areas can be a left air outlet discharging area 103 and a right concentrate discharging area 104, which correspond to the tailing processing mechanism 5 and the concentrate area 6, respectively, so as to respectively convey isolated materials with different magnetism, i.e. non-magnetic materials and magnetic materials, into the tailing processing mechanism 5 and the concentrate area 6, respectively, and play a role in isolating the materials with different magnetism through the material distributing plate 10; of course, the material distributing plate 10 may be in other numbers, such as a plurality. To facilitate adjustment of the material distributing position, the material distributing plate 10 is preferably arranged on the frame body 3 below the eccentric magnetic roller mechanism 2 in a position adjustable along the horizontal direction (relative to the position shown in fig. 1) to adjust the isolation position in the horizontal direction; of course, the material distributing plate 10 may also be a telescopic plate structure for adjusting the vertical height and adjusting the size of the gap between the material distributing plate 10 and the eccentric magnetic roller mechanism 2. In order to prolong the service life of the material distributing plate 10, preferably, the side wall of the material distributing plate 10 may be provided with a wear-resistant sheet, especially a position contacting with the material, and the wear-resistant sheet may be a wear-resistant ceramic sheet, or may be another wear-resistant sheet, which is not limited in this embodiment.

With continued reference to fig. 1 and 2, one side (the right side as viewed in fig. 1) of the material distribution plate 10 is provided with a concentrate guide plate 101 directly above the concentrate area 6 for guiding the falling magnetic material to fall into the concentrate area 6, avoiding the magnetic material from falling into the gap between the concentrate area 6 and the material distribution plate 10. To facilitate adjustment of the guiding angle of the concentrate guide plate 101, it is preferable that the concentrate guide plate 101 is rotatably coupled to the material distribution plate 10 to adjust the falling angle and the falling position of the magnetic material. Wherein, the concentrate deflector 101 can carry out the height position's regulation along with dividing flitch 10 to adjust its height position, and then adjust the height position that leads the material.

With continued reference to fig. 1 to 2, an outlet adjusting plate 102 is provided on the other side (left side as shown in fig. 1) of the material separating plate 10 directly above the tailings disposal mechanism 5, and is rotatably connected to the material separating plate 10 for adjusting the size of the outlet air discharging area formed between the material separating plate 10 and the positive air blowing path 1; the mouth is bigger, and the air output discharging area amount of wind is bigger, and air speed is bigger in air output discharging area department for more non-magnetic powdery material can drop to air output discharging area, makes the magnetic material grade that 6 sortings in concentrate region higher.

In this embodiment, as shown in fig. 1 and fig. 2, in order to realize the output and input of the material from the positive air blowing path 1, preferably, a material passing gap 9 may be provided between the eccentric magnetic roller mechanism 2 and the positive air blowing path 1, and between the eccentric magnetic roller mechanism 2 and the material separating plate 10, so that the material is conveyed into the positive air blowing path 1 or out of the positive air blowing path 1 along the surface of the eccentric magnetic roller mechanism 2, and also conveyed to the right above the concentrate region 5, so that the material in the feeding region 4 is conveyed into the positive air blowing path 1, and is subjected to a rolling motion, and a part of the non-magnetic material, the weak-magnetic material and the strong-magnetic material leave the positive air blowing path 1 under the magnetic field and the conveying action of the eccentric magnetic roller mechanism 2, and under the magnetic field and the conveying action of the eccentric magnetic roller mechanism 2 and the gravity action, the non-magnetic material and the magnetic material sequentially enter the tailing processing mechanism 5 and the concentrate region 6.

With continued reference to fig. 2 to 4, the positive air blowing path 1 includes: an air inlet area 11, an air outlet blanking area 12 and a sorting area 13; wherein, the air inlet area 11 is arranged at the upper side of the eccentric magnetic roller mechanism 2; the air outlet blanking area 12 is arranged at the lower side of the eccentric magnetic roller mechanism 2; the sorting area 13 is arranged between the air inlet area 11 and the air outlet blanking area 12. Specifically, as shown in fig. 4, an air inlet area 11, a sorting area 13 and an air outlet blanking area 12 are arranged from top to bottom in sequence; the air inlet area 11 can be connected with a blower to blow positive air which flows from top to bottom into the air inlet area 11, and the positive air can be high-speed air to ensure the effect of blowing the non-magnetic materials; wherein the eccentric magnetic roller mechanism 2 is partially arranged in the sorting area 13 so as to sort the materials at the sorting area 13, so that the magnetic materials and the non-magnetic materials are separated.

With continued reference to fig. 2, 5-7, the eccentric magnetic roller mechanism 2 includes: a magnetic drum 21 and an eccentric magnetic system 22; the magnetic roller 21 is connected with a roller driving part 23 and used for driving the magnetic roller 21 to rotate so as to convey materials on the surface of the magnetic roller 21, and the materials are conveyed into the positive air blowing path 1; the eccentric magnetic system 22 is eccentrically arranged in the magnetic drum 21, so that a strong magnetic area and a weak magnetic area are formed on the surface of the magnetic drum 21, wherein the strong magnetic area can be used as a magnetic separation area C, and the weak magnetic area can be used as an ore unloading area D; the eccentric magnetic system 22 is rotatably arranged in the magnetic drum 21 so as to lead the materials on the surface of the magnetic drum 21 to carry out rolling motion under the action of a rotating magnetic field; the magnetic separation area C is disposed in the separation area 13 of the normal air blowing path 1, so that the materials are rolled and separated under the combined action of gravity, centrifugal force, magnetic overturning force, wind force, magnetic field suction force and other forces.

Specifically, the magnetic roller 21 may be a cylindrical structure, and in order to prevent the magnetic roller 21 from generating heat during use, the magnetic roller 21 may be a non-metallic cylinder made of non-metallic materials such as glass fiber reinforced plastics, polyvinyl chloride, and polyvinyl chloride propylene, so as to prevent the materials from generating eddy currents, and further prevent the magnetic roller 21 from generating heat; in order to prolong the service life of the magnetic drum 21, preferably, the outer wall of the magnetic drum 21 may be provided with a wear-resistant sheet, especially at a position contacting with the material, and the wear-resistant sheet may be a wear-resistant ceramic sheet, or may be another wear-resistant sheet, which is not limited in this embodiment. The magnetic roller 21 can be connected with a roller driving part 23 for driving the magnetic roller 21 to rotate so as to convey the material on the surface of the magnetic roller 21, and further convey the material into the positive air blowing path 1; in the present embodiment, as shown in fig. 2, the magnetic drum 21 rotates counterclockwise, so that the air is conveyed into the positive air blowing path 1 on the left side of the magnetic drum 21 counterclockwise along the upper outer wall; of course, if the positive air blowing path 1 is located at the right side of the magnetic drum 21, the magnetic drum 21 may rotate clockwise, so that the material falls clockwise downward to be conveyed into the positive air blowing path at the right side for sorting; the cylinder driving part 23 can be a cylinder speed reducing motor, and the cylinder driving part 23 can be connected with the magnetic cylinder 21 through a chain wheel transmission mechanism 25; the rotating speed range of the cylinder driving part 23 is adjustable within 0-500 r/min.

With continued reference to fig. 2, 5 to 7, the eccentric magnetic system 22 and the magnetic drum 21 are eccentrically disposed, that is, they are not coaxially disposed, so that the outer surface of the magnetic drum 21 can form a strong magnetic region and a weak magnetic region; in order to enable the magnetic field to be arranged symmetrically up and down, the axes of the eccentric magnetic system 22 and the magnetic roller 21 can be on the same horizontal line, so that the eccentric magnetic system and the magnetic roller 21 can be conveyed along with the magnetic roller 21 at the upper part, and along with the weakening of the magnetic field at the lower part, a small part of residual nonmagnetic materials and magnetic materials sequentially fall down in the anticlockwise rotation process of the materials and respectively fall into the tailing processing mechanism 5 and the concentrate area 6 from the left side and the right side of the material distributing plate 10; the magnetic separation area C is arranged at the separation area 13 of the positive air blowing path 1, so that materials are rolled and separated under the multi-force composite action of gravity, centrifugal force, magnetic overturning force, wind power, magnetic field suction force and the like, the materials are layered, and separation between nonmagnetic materials and magnetic materials can be realized; in this embodiment, the eccentric amounts of the two can be determined according to actual conditions, and this embodiment is not limited in any way. The eccentric magnetic system 22 is rotatably disposed in the magnetic drum 21 to provide a rotating magnetic field to allow the materials to be turned over, and particularly, the materials can be turned over at a high speed in a strong magnetic region to realize layering of different materials. To achieve rotation of the eccentric magnetic system 22, preferably, the eccentric magnetic system 22 may be connected with a magnetic system driving member 24 for driving the eccentric magnetic system 22 to rotate; in this embodiment, the rotation directions of the eccentric magnetic system 22 and the magnetic drum 21 are opposite, and the eccentric magnetic system 22 can rotate clockwise, so that the relative rotation speed between the two is increased, and the material layering effect is improved. Wherein, the eccentric magnetic system 22 can be a 360-degree full magnetic structure with N-S alternate arrangement; the magnetic system driving part 24 can be a 4-pole motor and drives the eccentric magnetic system 22 to rotate at a high speed, and the rotating speed range is 0-3000r/min and is adjustable.

In this embodiment, be equipped with the gap between the bottom in magnetic drum 21 and pan feeding district 4, it can be 2mm to magnetic drum 21 can the free rotation, and then realizes the transport of material, makes the material follow the synchronous anticlockwise rotation of magnetic drum 21.

With continued reference to fig. 1-2, the tailings disposal facility 5 comprises: gravity settling chamber 51 and airlock valve 52; the gravity settling chamber 51 can be arranged below the air outlet blanking area 12 of the positive blowing path 1 and the air outlet discharging area 103 on one side of the air outlet blanking area 12, the air locking valve 52 is connected with the gravity settling chamber 51, and the gravity settling chamber 51 is used for receiving air carrying non-magnetic materials and performing settling treatment on the air to discharge the non-magnetic materials into the air locking valve 52, and air locking is performed through the air locking valve 52 and the non-magnetic materials are discharged. The gravity settling chamber 51 may be formed by welding steel plates, and the inner wall of the gravity settling chamber 51 may be provided with a wear-resistant sheet, especially at a contact position with a material, where the wear-resistant sheet may be a wear-resistant ceramic sheet or other wear-resistant sheets, and this embodiment does not limit this.

Referring to fig. 8 to 9, a preferred structure of the gravity settling chamber provided by the embodiment of the present invention is shown. As shown in the figure, a settling zone 513, a feeding air inlet zone 511, a discharging zone 512 and an air outlet discharging zone 514 which are communicated with the settling zone 513 may be disposed in the gravity settling chamber 51, the feeding air inlet zone 511 receives nonmagnetic materials and air, and enters the settling zone 513, the nonmagnetic materials are settled by the settling zone 513, part of the nonmagnetic materials fall into the discharging zone 512 disposed at the bottom of the settling zone 513 and are discharged, and part of the nonmagnetic materials are carried to the air outlet discharging zone 514 on the left side of the settling zone 513 by the air and are discharged. Specifically, the feeding air inlet area 511 can be connected with the air outlet blanking area 12 and the air outlet discharging area 103, non-magnetic materials and air enter the settling area 513 from the feeding air inlet area 511, the cross-sectional area of the settling area 513 is larger than that of the feeding air inlet area 511, so that the air speed is reduced to reduce the material carrying capacity of the air to realize the material settling, namely, the air speed is reduced due to the sudden increase of the cross-sectional area of the settling area 513, the material carrying capacity of the air is reduced, most of the materials settle in the discharging area 512, and part of the materials are carried to the air outlet discharging area 514 by the air; the outlet air outlet material area 514 may be connected to an external dust collector, and the air with material is filtered by the dust collector and then discharged into the atmosphere, and the material is collected by the dust collector.

Referring to fig. 10 and 11, a preferred structure of the airlock valve provided by the embodiment of the utility model is shown. As shown, the latch valve 52 includes: a lock cylinder 521, an impeller shaft 522; wherein, the top of the air locking cylinder 521 is provided with a feed inlet 5211, and the bottom is provided with a discharge outlet 5212; the impeller shaft 522 is rotatably disposed inside the air locking barrel 521 along the axial direction of the air locking barrel 521, and an impeller 523 is disposed on the impeller shaft 522 and is configured to rotate with the impeller shaft 522 so as to drive the material from the feed port 5211 to the discharge port 5212. Specifically, the air locking cylinder 521 may be a horizontally disposed cylinder structure with two open ends, and two ends (the left end and the right end as shown in fig. 10) of the air locking cylinder 521 may both be provided with end caps 524, so as to seal the air locking cylinder 521 and prevent the material from being discharged from the two ends; a feed inlet 5211 is formed in the top of the air locking cylinder 521, and a discharge outlet 5212 is formed in the bottom of the air locking cylinder to receive and discharge materials; to facilitate connection between the airlock cylinder 521 and other components, flanges may be provided at the inlet port 5211 and the outlet port 5212 for detachable connection to other components, such as the discharge area 512 of the gravity settling chamber 51 via the upper flange of the inlet port 5211; the flange may be connected to the feed port 5211 and the discharge port 5212 by welding or in other manners, which is not limited in this embodiment. The impeller shaft 522 can be coaxially arranged in the wind locking cylinder 521, and both ends of the impeller shaft 522 can be rotatably arranged through the end covers 524 to support the impeller shaft 522 through the end covers 524; the impeller shaft 522 is provided with a plurality of groups of impellers 523 which are distributed at intervals along the axial direction, and each group of impellers is distributed in a scattering shape along the circumferential direction of the impeller shaft 522 so as to convey materials, avoid the accumulation and blockage of the materials and play a role in locking air. As shown in fig. 11, there is a rotational gap between the impeller 523 and the inner wall of the lock cylinder 521, which may be 5 mm; when the material falls into the gap between the impellers 523, the material is brought to the discharge port 5212 to be discharged along with the rotation of the impellers 523, and the air locking valve 52 plays the roles of locking air and discharging. To facilitate rotation of the impeller shaft 522, a drive structure is preferably coupled to the impeller shaft 522 to drive rotation of the impeller shaft 522. As shown in fig. 10, the drive mechanism may be a hand wheel 525 for manual drive; of course, the driving mechanism may also be an electric motor to realize electric driving.

The working process of the dry type fine separator comprises the following steps: the feeding area 4 receives materials, the materials are buffered by the feeding area 4 through the feeding slide carriage 41 and then fall onto the surface of the magnetic drum 21, the magnetic drum 21 rotates anticlockwise to drive the materials to enter the sorting area 13 through the material passing gap 9, meanwhile, when the materials contact a magnetic field, the materials do high-speed rolling motion under the high-speed rotation action of the eccentric magnetic system 22 of the N-S alternating magnetic field, when the materials roll, the materials are automatically layered on the surface of the magnetic drum 21, the magnetic materials are distributed on the innermost layer, and the non-magnetic materials are distributed on the outermost layer; the non-magnetic fine powdery material at the outermost layer is small in particles and small in centrifugal force and is difficult to separate from the material layer in time, so under the action of positive high-speed wind, namely positive wind, in the positive wind blowing path 1, the non-magnetic fine powdery material at the outermost layer is partially brought up to move downwards along with the high-speed wind, most of the fine powdery non-magnetic material leaves the surface of the eccentric magnetic roller mechanism 2 under the action of the wind and is fully distributed in the space of the wind path, the fine powdery non-magnetic material in the wind path is brought away along with the high-speed wind and falls into the tailing treatment mechanism 5, and the tailing treatment mechanism 5 carries out sedimentation treatment on tailings, so that the collection and output of the tailings are realized; the magnetic material concentrate falls to a concentrate area 6 along with the rotation of the eccentric magnetic roller mechanism 2 and the reduction of the magnetic field, so that the superfine crushed material is classified, efficiently and finely separated.

In summary, in the dry-type classificator provided by this embodiment, under the conveying action of the eccentric magnetic roller mechanism 2, the material in the feeding area 4 is conveyed into the positive air blowing path 1 and performs rolling motion, so that the material is layered on the surface of the eccentric magnetic roller mechanism 2, and the magnetic material is arranged at the innermost layer, and the non-magnetic material is arranged at the outermost layer; the non-magnetic fine powdery material at the outermost layer is small in particles and small in centrifugal force and is difficult to separate from the material layer in time, so under the action of positive high-speed wind, namely positive wind, in the positive wind blowing path 1, the non-magnetic fine powdery material at the outermost layer is partially brought up to move downwards along with the high-speed wind, most of the fine powdery non-magnetic material leaves the surface of the eccentric magnetic roller mechanism 2 under the action of the wind and is fully distributed in the space of the wind path, the fine powdery non-magnetic material in the wind path is brought away along with the high-speed wind and falls into the tailing treatment mechanism 5, and the tailing treatment mechanism 5 carries out sedimentation treatment on tailings, so that the collection and output of the tailings are realized; the magnetic material concentrate falls to a concentrate area 6 along with the rotation of the eccentric magnetic roller mechanism 2 and the reduction of the magnetic field, so that the superfine crushed material is classified, efficiently and finely separated.

The dry type fine separator provides a complex separation environment with coupling of multiple physical fields for dry type magnetic separation of superfine materials, the materials are mainly subjected to the multi-force composite action of gravity, centrifugal force, magnetic overturning force, forward wind force, magnetic field suction force and the like, so that the purposes of classification type, high efficiency and fine separation are achieved, the problem that dry type ultrafine powdery materials after dry grinding classification cannot be effectively subjected to dry type separation is solved, and technical feasibility is provided for fully utilizing iron ore resources in water-deficient areas.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A dry concentrator, comprising: a positive air blowing path (1) and an eccentric magnetic roller mechanism (2); wherein the content of the first and second substances,

the eccentric magnetic roller mechanism (2) is partially arranged in the positive air blowing path (1), the positive air blowing path (1) is used for blowing positive air in the same direction as the material conveying direction to the surface of the eccentric magnetic roller mechanism (2), and the eccentric magnetic roller mechanism (2) is used for conveying materials and providing an eccentric rotating magnetic field;

a feeding area (4) is arranged above the eccentric magnetic roller mechanism (2);

a tailing treatment mechanism (5) and a concentrate area (6) are arranged below the eccentric magnetic rolling mechanism (2);

under the transport effect of eccentric magnetism rolling mechanism (2), the material in pan feeding district (4) is carried extremely just blow and carry out rolling motion in wind path (1), so that the material is in the surface layering of eccentric magnetism rolling mechanism (2) makes strong magnetic material arrange at the innermost layer, and weak magnetic material arranges at the middle level, and non-magnetic material arranges outwardly, and outwardly non-magnetic material leaves under the effect of just blowing of wind path (1) the surface of eccentric magnetism rolling mechanism (2) blows in to tailing processing mechanism (5) along with the wind in, through tailing processing mechanism (5) carry out settlement treatment to non-magnetic material, realize the collection of non-magnetic material, and magnetic material is in enter into concentrate district (6) under the magnetic field and the transport effect of eccentric magnetism rolling mechanism (2) in proper order.

2. A dry concentrator as claimed in claim 1, wherein the eccentric magnetic roller mechanism (2) comprises: a magnetic drum (21) and an eccentric magnetic system (22); wherein the content of the first and second substances,

the magnetic roller (21) is connected with a roller driving part (23) for driving the magnetic roller (21) to rotate so as to convey the material on the surface of the magnetic roller (21) and convey the material into the positive air blowing path (1);

the eccentric magnetic system (22) is eccentrically arranged in the magnetic roller (21), a magnetic separation area and an ore unloading area are formed on the surface of the magnetic roller (21), and the magnetic separation area is arranged at the separation area of the positive air blowing path (1) so that materials can be rolled and non-magnetic materials can be separated under the action of a magnetic field and wind force;

the eccentric magnetic system (22) is rotatably arranged in the magnetic roller (21) so that the materials on the surface of the magnetic roller (21) carry out rolling motion under the action of a rotating magnetic field.

3. A dry concentrator as recited in claim 2,

the eccentric magnetic system (22) is connected with a magnetic system driving piece (24) and used for driving the eccentric magnetic system (22) to rotate.

4. A dry concentrator as claimed in claim 2, wherein the direction of rotation between the eccentric magnetic train (22) and the magnetic drum (21) is opposite.

5. A dry concentrator as claimed in any one of claims 1 to 4,

a material distributing plate (10) is arranged on one side of the positive air blowing path (1) below the eccentric magnetic rolling mechanism (2), and a plurality of blanking areas are formed on one side of an air outlet of the positive air blowing path (1) in an isolating mode and used for isolating different magnetic materials.

6. A dry concentrator as recited in claim 5,

a concentrate guide plate is arranged on one side of the material distributing plate (10) right above the concentrate area (6) and used for guiding the falling magnetic materials;

and an outlet adjusting plate is arranged on the other side of the material distributing plate (10) right above the tailing processing mechanism (5), is rotatably connected to the material distributing plate (10) and is used for adjusting the size of a discharge port of an air outlet discharge area formed between the material distributing plate (10) and the positive blowing air path (1) and further adjusting the grade of the sorted materials.

7. A dry concentrator as claimed in any one of claims 1 to 4, wherein the tailings disposal means (5) comprises: a gravity settling chamber (51) and a airlock valve (52); wherein the content of the first and second substances,

the gravity settling chamber (51) can be arranged below the normal blowing air path (1), the air locking valve (52) is connected with the gravity settling chamber (51), the air locking valve (52) is used for locking air of the gravity settling chamber (51) and discharging materials, the gravity settling chamber (51) is used for receiving air carrying nonmagnetic materials and performing settling treatment on the nonmagnetic materials, so that the nonmagnetic materials are discharged into the air locking valve (52), and the nonmagnetic materials are discharged through the air locking valve (52).

8. A dry concentrator as recited in claim 7,

the gravity settling chamber (51) is provided with a settling area (513), and a feeding air inlet area (511), a discharging area (512) and an air outlet discharging area (514) which are communicated with the settling area (513).

9. A dry concentrator as claimed in claim 7, wherein the airlock valve (52) comprises: a lock cylinder (521) and an impeller shaft (522); wherein the content of the first and second substances,

the air locking cylinder (521) is provided with a feed inlet (5211) and a discharge outlet (5212);

the impeller shaft (522) is rotatably arranged inside the air locking cylinder (521) along the axial direction of the air locking cylinder (521), and an impeller (523) is arranged on the impeller shaft (522) and used for rotating along with the impeller shaft (522) so as to drive materials from the feed port (5211) to the discharge port (5212).

10. A dry concentrator as claimed in any one of claims 1 to 4,

and a cleaning brush (7) and/or a cleaning scraper (8) which are positioned at the periphery of the eccentric magnetic roller mechanism (2) are arranged outside the positive air blowing path (1) and are used for cleaning materials attached to the surface of the eccentric magnetic roller mechanism (2).

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