AU2021471055A9 - Dry-type pre-concentration machine - Google Patents
Dry-type pre-concentration machine Download PDFInfo
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- AU2021471055A9 AU2021471055A9 AU2021471055A AU2021471055A AU2021471055A9 AU 2021471055 A9 AU2021471055 A9 AU 2021471055A9 AU 2021471055 A AU2021471055 A AU 2021471055A AU 2021471055 A AU2021471055 A AU 2021471055A AU 2021471055 A9 AU2021471055 A9 AU 2021471055A9
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- 238000004094 preconcentration Methods 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 189
- 230000007246 mechanism Effects 0.000 claims abstract description 99
- 238000007664 blowing Methods 0.000 claims abstract description 95
- 239000000696 magnetic material Substances 0.000 claims abstract description 43
- 230000009471 action Effects 0.000 claims abstract description 32
- 239000012141 concentrate Substances 0.000 claims abstract description 25
- 230000002441 reversible effect Effects 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims description 32
- 238000004140 cleaning Methods 0.000 claims description 23
- 238000007599 discharging Methods 0.000 claims description 17
- 230000003139 buffering effect Effects 0.000 claims description 4
- 238000000638 solvent extraction Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 abstract description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 5
- 239000011707 mineral Substances 0.000 abstract description 5
- 239000000843 powder Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- 238000007885 magnetic separation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- -1 polypropylene chloride Polymers 0.000 description 4
- 239000011152 fibreglass Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000005456 ore beneficiation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
- B03C1/12—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operation; with movable pole pieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
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- Manufacture And Refinement Of Metals (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Provided in the present application is a dry-type pre-concentration machine. The dry-type pre-concentration machine comprises: a reverse air-blowing path and an eccentric magnetic rolling mechanism, wherein the eccentric magnetic rolling mechanism is partially arranged in the reverse air-blowing path, is configured to convey materials, and is further configured to provide an eccentric rotating magnetic field; a feeding area is provided above the eccentric magnetic rolling mechanism; and a tailing area, a middling area, and a concentrate area are arranged below the eccentric magnetic rolling mechanism. In the present application, materials in the feeding area are conveyed into the reverse air-blowing path and subjected to a rolling motion, so that strong magnetic materials are arranged on the innermost layer, weakly magnetic materials are arranged on a middle layer, non-magnetic materials are arranged on the outermost layer, and under the action of reversely blown air in the reverse air-blowing path, non-magnetic fine powdery materials on an outer layer leave a surface of the eccentric magnetic rolling mechanism and are carried by wind into or fall into the tailing area; and weakly magnetic minerals fall into the middling area along with rotation of a magnetic roller and reduction of the magnetic field, and concentrate falls into the concentrate area along with the rotation of the magnetic roller and the reduction of the magnetic field, so that ultra-fine crushed materials are sorted in a graded, efficient, and fine manner.
Description
Cross Reference to Related Applications This application claims priority for Chinese patent application No. 202111241839.0, entitled
"Dry-Type Pre-Concentration Machine" and Chinese patent application No. 202122568727.8,
entitled "Dry-Type Pre-Concentration Machine", both filed with China National Intellectual Property Administration on Oct. 25, 2021, all contents of which are hereby incorporated by
reference. Technical Field The application relates to the technical field of magnetic separation, in particular to a dry-type pre-concentration machine. Background
The sustained and rapid development of China's economy leads to a high demand for raw materials. Iron ore is one of the main raw materials in the iron and steel industry, the beneficiation
process of which has made significant progress after year's of continuous innovation and upgrading of technology and equipment . For example, in recent years, ultra-fine crushing
equipment such as high-pressure roller mill, vertical mill and novel hammer crusher has been
widely used in iron ore beneficiation, greatly reducing the production cost of enterprises. However, the innovation of iron ore processing equipment is mostly about crushing and
grinding equipment. For magnetic separation, traditional magnetic separation equipment is still
used, the separation effect of which is not quite satisfactory. Especially, when traditional dry magnetic separation equipment is used for separating materials crushed by novel ultra-fine
crushing equipment, the separation effect is poor because finer materials lead to serious magnetic
shielding and magnetic inclusion. Summary of the Invention
In view of this, this application proposes a dry-type pre-concentration machine, aiming at solving the problem of poor separation effect of existing dry magnetic separation equipment
caused by serious magnetic shielding and magnetic mixing. The application provides a dry-type pre-concentration machine, comprising a back blowing
air path and an eccentric magnetic roller mechanism, wherein the eccentric magnetic roller
mechanism is partially arranged in the back blowing air path, the back blowing air path is used for blowing reverse air opposite to a material conveying direction to a 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 tailings area, a middlings area and a concentrate area are arranged below the eccentric magnetic roller mechanism; materials in the feeding area are conveyed by the eccentric magnetic roller mechanism into the back blowing air path to roll, so that the materials are layered on the surface of the eccentric magnetic roller mechanism, with strong magnetic materials being in an innermost layer, weak magnetic materials being in a middle layer, and nonmagnetic materials being in an outermost layer; the nonmagnetic materials in the outermost layer leave the surface of the eccentric magnetic roller mechanism to enter the tailings area under the action of the reverse air of the back blowing air path or is blown out with the air; and the weak magnetic materials and the strong magnetic materials sequentially enter the middlings area and the concentrate area under the magnetic field and conveying action of the eccentric magnetic roller mechanism.
Further, for the above dry-type pre-concentration machine, the eccentric magnetic roller
mechanism comprises a magnetic roller and an eccentric magnetic system, wherein the magnetic roller is connected with a roller driving part for driving the magnetic roller to rotate, so as to convey
the materials on a surface of the magnetic roller into the back blowing air path; the eccentric magnetic system is eccentrically arranged inside the magnetic roller, a strong magnetic area and a
weak magnetic area are formed on the surface of the magnetic roller, and the strong magnetic area
is arranged at a separation area of the back blowing air path, so that the materials can roll under the action of the magnetic field and the air, and nonmagnetic materials can be separated out; and
the eccentric magnetic system is rotatably arranged in the magnetic roller, so that the materials on
the surface of the magnetic roller can roll under the action of the rotating magnetic field. Further, for the above dry-type pre-concentration machine, the eccentric magnetic system is connected with a magnetic system driving part for driving the eccentric magnetic system to rotate.
Further, for the above dry-type pre-concentration machine, the magnetic roller is a
nonmetallic cylinder structure; and/or the back blowing air path is a nonmetallic air path; and/or the feeding area is a nonmetallic feeding area.
Further, for the above dry-type pre-concentration machine, the back blowing air path
comprises: an air inlet and discharging area arranged on the lower side of the eccentric magnetic roller mechanism; an air and material outlet area arranged on the upper side of the eccentric
magnetic roller mechanism; and a separation area arranged between the air inlet and discharging area and the air and material outlet area. Further, for the above dry-type pre-concentration machine, the strong magnetic area of the eccentric magnetic roller mechanism is arranged at the separation area of the back blowing air path, so that materials roll and are separated under the action of the magnetic field and the air. Further, for the above dry-type pre-concentration machine, a material distributing plate is arranged below the eccentric magnetic roller mechanism at one side of the back blowing air path, and a plurality of discharging areas are formed at one side of an air inlet of the back blowing air path through partitioning to separate different magnetic materials; and the material distributing plate is adjustably arranged below the eccentric magnetic roller mechanism in a horizontal direction, and the material distributing plate is a telescopic plate structure used for adjusting the vertical height and the material distributing position. Further, for the above dry-type pre-concentration machine, a side wall of the distributing plate, an inner wall of the back blowing air path and/or an outer wall of the eccentric magnetic roller mechanism is provided with a wear-resistant sheet. Further, for the above dry-type pre-concentration machine, the feeding area is provided with a feeding chute which is used for buffering the materials input through the feeding area. Further, for the above dry-type pre-concentration machine, a cleaning brush and/or a cleaning scraper located on the periphery of the eccentric magnetic roller mechanism is arranged outside the back blowing air path to clean the materials attached to the surface of the eccentric magnetic roller mechanism. According to the dry-type pre-concentration machine provided by the application, the materials in the feeding area are conveyed by the conveying action of the eccentric magnetic roller mechanism into the back blowing air path roll, so that the materials are layered on the surface of the eccentric magnetic roller mechanism, with the strong magnetic materials being in the innermost layer, the weak magnetic materials being in the middle layer and the nonmagnetic materials being in the outermost layer; the nonmagnetic fine powder materials in the outermost layer are hard to separate from the material layer in time due to their small particle size and small centrifugal force, therefore, under the action of the reverse air in the back blowing air path, the nonmagnetic fine powder materials in the outermost layer will be taken away, most of the fine powder nonmagnetic materials will leave the surface of the eccentric magnetic roller mechanism under the action of the air and fill the space of the back blowing air path, and the fine powder nonmagnetic materials in the back blowing air path can either be taken away by the air or fall into the tailings area; most of the nonmagnetic granular materials are brought to the tailings area with the rotation of the magnetic roller and the attenuation of the magnetic field; and the weak magnetic minerals fall to the middlings area with the rotation of the magnetic roller and the weakening of the magnetic field, and concentrates fall to the concentrate area with the rotation of the magnetic roller and the attenuation of the magnetic field, so that graded, efficient and fine separation of the ultra-fine materials is realized. The dry-type pre-concentration machine provides a complex separation environment coupled with multiple physical fields for dry magnetic separation of ultra-fine materials, in which the materials are subjected to the combined action of multiple forces including gravity, centrifugal force, magnetic overturning force, wind force, magnetic attraction, etc., so graded, efficient and fine separation of the materials is realized, and the problem that the separation index of a traditional dry separator for ultra-fine materials such as undersize materials after a high-pressure roller mill, oversize materials of a vertical mill and undersize materials of a hammer crusher is not up to standard is solved, =thus fulfilling the purposes of increasing the rejection rate, improving the metal grade and reducing the production cost. Brief Description of the Drawings
Various other advantages and benefits of the invention will become clear to those of ordinary skill in the art upon reading the following detailed description of preferred embodiments. The
drawings are only for the purpose of illustrating preferred embodiments, and are not to be
considered as limiting the application. In the drawings, the same reference signs are used to represent the same components. In the drawings:
Fig. 1 is a structural diagram of a dry-type pre-concentration machine provided by an
embodiment of the application; Fig. 2 is a diagram of a principle structure of a dry-type pre-concentration machine provided by an embodiment of the application;
Fig. 3 is a front view of a back blowing air path provided by an embodiment of the application;
Fig. 4 is a sectional view of A-A in Fig. 3; Fig. 5 is a side view of an eccentric magnetic roller mechanism provided by an embodiment
of the application;
Fig. 6 is a front view of an eccentric magnetic roller mechanism provided by an embodiment of the application;
Fig. 7 is a sectional view of B-B in Fig. 6;
Fig. 8 is a side view of a material distributing plate provided by an embodiment of the
application. Detailed Description of the Invention
Exemplary embodiments of the disclosure will be described in more detail below with
reference to the accompanying drawings. Although exemplary embodiments of the disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. On the contrary, these
embodiments are provided to enable a more thorough understanding of the disclosure and to fully
convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each
other when there is no conflict. The application will be described in detail with reference to the
drawings and embodiments. Referring to Figs. 1-2, the structural diagram of a dry-type pre-concentration machine
provided by an embodiment of the application is shown. As shown in the figures, the dry-type pre
concentration machine comprises a back blowing air path 1, an eccentric magnetic roller mechanism 2 and a frame 3. Here, the frame 3 is used to support the eccentric magnetic roller
mechanism 2, the back blowing air path 1, etc. Referring to Figs. 1 and 2, the eccentric magnetic roller mechanism 2 is partially arranged in
the back blowing air path 1, the back blowing air path 1 is used for blowing reverse air opposite
to the material conveying direction to a 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. Specifically, the back blowing air path 1 can be vertically
arranged to blow air upward vertically. The eccentric magnetic roller mechanism 2 can be partially arranged in the back blowing air path 1, and the eccentric magnetic roller mechanism 2 and the back blowing air path 1 form a separation area for separating materials. The eccentric magnetic
roller mechanism 2 allows the materials to be conveyed into the back blowing air path 1 along the
surface of the eccentric magnetic roller mechanism 2. The eccentric magnetic roller mechanism 2 can also provide an eccentric rotating magnetic field, so that the materials can roll, and magnetic
materials are absorbed on the surface of the eccentric magnetic roller mechanism 2 to be conveyed
along with the rotating and rolling surface of the eccentric magnetic roller mechanism 2, thus preventing the magnetic materials from falling vertically under the action of gravity. In this
embodiment, the eccentric magnetic roller mechanism 2 can realize the transportation of materials, and can provide rotating magnetic fields with different surface intensities, so as to form a weak magnetic area and a strong magnetic area, so that the materials can roll at a high speed at the strong magnetic area of the eccentric magnetic roller mechanism 2 in the back blowing air path 1 to be layered; and the magnetic materials can be adsorbed under the action of the magnetic field, different magnetic materials can fall separately with the change of magnetic field intensity, and then material separation can be realized. The blowing direction of the back blowing air path 1 is opposite to the conveying direction of the materials, that is, the blowing direction is from bottom to top, and the materials are conveyed downwards under gravity and the conveying action of the eccentric magnetic roller mechanism 2. Of course, the blowing direction of the back blowing air path 1 can also be inclined, as long as there is a component that is vertically upward, that is, opposite to the conveying direction of the materials. In order to avoid heating of the back blowing air path 1 in use, the back blowing air path 1 can be a non-metallic air path, that is, external plates surrounding the back blowing air path 1 can be non-metallic materials such as glass fiber reinforced plastic, polyvinyl chloride, polypropylene chloride, etc., so as to prevent the materials from forming an eddy current, thus avoiding heating of the back blowing air path 1. In order to prolong the service life of the back blowing air path 1, preferably, an inner wall of the back blowing air path 1 can be provided with a wear-resistant sheet, especially at the position in contact with the materials. The wear-resistant sheet can be a wear-resistant ceramic sheet, or other wear-resistant sheets, which is not limited in this embodiment. Referring to Figs. 1 and 2 again, a feeding area 31 is arranged above the eccentric magnetic roller mechanism 2, and the feeding area 31 can be supported by the frame 3 to receive materials, so that the materials can be conveyed from the feeding area 31 to the surface of the eccentric magnetic roller mechanism 2 under gravity. Specifically, the feeding area 31 can be arranged at one side of an air outlet of the back blowing air path 1 (the right side as shown in Fig. 1), so that materials can fall to the surface of the eccentric magnetic roller mechanism 2 under gravity through the feeding area 31, and be conveyed into the back blowing air path 1 under the rolling action of the eccentric magnetic roller mechanism 2. Moreover, the feeding area 31 and the back blowing air path 1 can share an intermediate partition plate. In this embodiment, a feeding port (the upper end as shown in Fig. 1) of the feeding area 31 can be connected with an external feeder to realize the input of materials. In order to buffer the input of materials, preferably, a feeding chute 311 is arranged at the feeding area 31, which is used for buffering the materials input in the feeding area 31. The feeding chute 311 can be obliquely arranged on an inner wall of the feeding area 31, so as to guide and buffer the materials, so that the buffered materials can fall on the surface of the eccentric magnetic roller mechanism 2. Preferably, the feeding chute 311 is rotatably connected to the inner wall of the feeding area 31 to adjust its buffering angle. In order to avoid heating of the feeding area 31 in use, preferably, the feeding area 31 can be a nonmetallic feeding area, that is, external plates surrounding the feeding area 31 can be nonmetallic materials such as glass fiber reinforced plastic, polyvinyl chloride, polypropylene chloride, etc., so as to prevent the materials from forming an eddy current, thus avoiding the heating of the feeding area 31. In order to prolong the service life of the feeding area 31, preferably, the inner wall of the feeding area 31 can be provided with a wear-resistant sheet, especially at the position making contact with the materials. The wear-resistant sheet can be a wear-resistant ceramic sheet or other wear-resistant sheets, which is not limited in this embodiment.
Referring to Figs. 1 and 2 again, a tailings area 32, a middlings area 33 and a concentrate area 34 are arranged below the eccentric magnetic roller mechanism 2, which can be supported by the
frame 3, so that the nonmagnetic materials are output from the tailings area 32 as tailings, the weak
magnetic materials are output from the middlings area 33 as middlings, and the strong magnetic materials are output from the concentrate area 34 as concentrates. Besides, the tailings area 32 is
also arranged below the back blowing air path 1, so that tailings falling from the back blowing air path 1 also fall into the tailings area 32 to be collected. Specifically, the tailings area 32, the
middlings area 33 and the concentrate area 34 can be sequentially arranged from left to right, the
position of the tailings area 32 is matched with the position of the back blowing air path 1, and the tailings area 32 can be arranged right below the back blowing air path 1 so as to receive the
nonmagnetic materials blown out by the reverse air of the back blowing air path 1; and the
positions of the middlings area 33 and the concentrate area 34 are matched with the magnetic field intensity distribution of the eccentric magnetic roller mechanism 2, that is, the magnetic field intensity above the middlings area 33 and the concentrate area 34 can be reduced in turn, so that
the weak magnetic materials and the strong magnetic materials can fall into the middlings area 33
and the concentrate area 34 in turn. Referring to Fig. 2, the materials in the feeding area 31 are conveyed by the eccentric magnetic
roller mechanism 2 into the back blowing air path 1 to roll, so that the materials are automatically
layered on the surface of the eccentric magnetic roller mechanism 2 during rolling, with the strong magnetic materials being in the innermost layer, the weak magnetic materials being in the middle
layer and the nonmagnetic materials being in the outermost layer; the nonmagnetic fine powder materials in the outermost layer are hard to separate from the material layer in time due to their small particle size and small centrifugal force, therefore, under the action of high-speed air, that is, the air in the back blowing air path 1, the nonmagnetic fine powder materials in the outermost layer will be driven by the high-speed wind to move upward, most of the fine powder nonmagnetic materials will leave the surface of the eccentric magnetic roller mechanism 2 under the action of the wind and fill the space of the air path, and the fine powder nonmagnetic materials in the air path can either be taken away by the wind or fall into the tailings area 32; most of the nonmagnetic granular materials are brought to the tailings area 32 with the rotation of the eccentric magnetic roller mechanism 2 and the attenuation of the magnetic field; and the weak magnetic materials, that is, weak magnetic minerals, fall to the middlings area 33 with the rotation of the eccentric magnetic roller mechanism 2 and the attenuation of the magnetic field, and the strong magnetic materials, that is, concentrates fall to the concentrate area 34 with the rotation of the eccentric magnetic roller mechanism 2 and the attenuation of the magnetic field, so that graded, efficient and fine separation of the ultra-fine materials is realized. As shown in Fig. 2, the triangle mark indicates nonmagnetic material, the circular mark indicates medium magnetic material or weak magnetic material, and the square mark indicates magnetic material or strong magnetic material. Referring to Figs. 1 and 2 again, a cleaning brush 4 and/or a cleaning scraper 5 located on the periphery of the eccentric magnetic roller mechanism 2 is arranged outside the back blowing air path 1 to clean the materials attached to the surface of the eccentric magnetic roller mechanism 2. Specifically, the cleaning brush 4 and/or the cleaning scraper 5 can be supported by the frame 3 through a support frame, and the cleaning brush 4 and the cleaning scraper 5 can be arranged in the weak magnetic area of the eccentric magnetic roller mechanism 2, so as to clean the materials attached to the surface of the eccentric magnetic roller mechanism 2 after the materials are separated. In this embodiment, when the eccentric magnetic roller mechanism 2 conveys materials counterclockwise, the cleaning brush 4 and the cleaning scraper 5 are arranged in the weak magnetic area on the right side, and the cleaning scraper 5 is arranged below the cleaning brush 4, so as to perform scraping and cleaning in sequence, thereby ensuring the material cleaning effect. In order to adjust the cleaning gap, preferably, the gap between the cleaning brush 4 or the cleaning scraper 5 and the eccentric magnetic roller mechanism 2 can be adjusted. For example, the cleaning brush 4 and the cleaning scraper 5 can be connected to the support frame through 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 4 can be made of nylon, and the cleaning scraper 5 can be made of rubber. In this embodiment, as shown in Figs. 1 and 2, in order to realize the output and input of materials through the back blowing air path 1, preferably, a material passing gap 6 is provided between the eccentric magnetic roller mechanism 2 and the back blowing air path 1, so that the materials can be conveyed to the inside or outside of the back blowing air path 1 along the surface of the eccentric magnetic roller mechanism 2, in this way, the materials in the feeding area 31 can be conveyed into the back blowing air path 1 and roll, part of the nonmagnetic materials, weak magnetic materials and strong magnetic materials leave the back blowing air path 1 under the magnetic field and conveying action of the eccentric magnetic roller mechanism 2, and under the magnetic field and conveying action of the eccentric magnetic roller mechanism 2 and gravity, the nonmagnetic materials, the weak magnetic materials and the strong magnetic materials sequentially enter the tailings area 32, the middlings area 33 and the concentrate area 34. In this embodiment, as shown in Figs. 1 and 2, a material distributing plate 7 is arranged below the eccentric magnetic roller mechanism 2 at one side of the back blowing air path 1 (the right side as shown in Fig. 1), and a plurality of discharging areas are formed at one side of an air outlet of the back blowing air path 1 (the lower end as shown in Fig. 1) through partitioning to separate different magnetic materials. Specifically, the material distributing plate 7 can be arranged on the frame 3 so as to partition the right side of the back blowing air path1 below the eccentric magnetic roller mechanism 2. In this embodiment, two material distributing plates 7 are arranged side by side in a spaced manner, so that three discharging areas can be formed, which correspond to the tailings area 32, the middlings area 33 and the concentrate area 34 respectively, so as to convey the separated materials with different magnetic properties into the tailings area 32, the middlings area 33 and the concentrate area 34 respectively, that is, the material distributing plate 7 serves to separate materials with different magnetic properties. Of course, there may also be one or multiple material distributing plates 7. To adjust the distributing position, preferably, the material distributing plate 7 is adjustably arranged on the frame 3 below the eccentric magnetic roller mechanism 2 in a horizontal direction (relative to the position shown in Fig. 1), so as to adjust the partitioning position in the horizontal direction. Of course, the material distributing plate 7 may also be a telescopic plate structure used to adjust the vertical height and a gap between the material distributing plate 7 and the eccentric magnetic roller mechanism 2. In order to prolong the service life of the material distributing plate 7, preferably, a side wall of the material distributing plate 7 can be provided with a wear-resistant sheet, especially at the position in contact with the materials. The wear-resistant sheet can be a wear-resistant ceramic sheet or other wear resistant sheets, which is not limited in this embodiment. Referring to Figs. 2-4, the back blowing air path 1 comprises an air inlet and discharging area
11, an air and material outlet area 12 and a separation area 13. The air inlet and discharging area
11 is arranged at the lower side of the eccentric magnetic roller mechanism 2, the air and material outlet area 12 is arranged at the upper side of the eccentric magnetic roller mechanism 2, and the separation area 13 is arranged between the air inlet and discharging area 11 and the air and material
outlet area 12. Specifically, as shown in Fig. 4, the air inlet and discharging area 11, the separation
area 13 and the air and material outlet area 12 are sequentially arranged from bottom to top. The air inlet and discharging area 11 can be connected with a blower to blow reverse air flowing from
bottom to top into the air inlet and discharging area 11, and the air may be high-speed air, so as to
ensure the effect of blowing nonmagnetic materials. The eccentric magnetic roller mechanism 2 is partially arranged in the separation area 13, so as to separate the magnetic materials from the
nonmagnetic materials at the separation area 13. To ensure that air flows from bottom to top,
preferably, the air and material outlet area 12 can be connected with an exhaust fan, the high-speed wind enters the separation area 13 from the air inlet and discharging area 11, and some materials,
especially the nonmagnetic materials, are taken to the air and material outlet area 12 by the wind to be discharged from the dry-type pre-concentration machine. To prevent the air from being
polluted by the wind carrying materials discharged from the air inlet and discharging area 11, the
air and material outlet area 12 can be connected with a dust collector, so that the wind carrying materials is filtered by the dust collector and then discharged into the atmosphere, and the materials
are collected by the dust collector.
Referring to Fig. 2 and Figs. 5-7, the eccentric magnetic roller mechanism 2 comprises a magnetic roller 21 and an eccentric magnetic system 22; 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 materials
on a surface of the magnetic roller 21 into the back blowing air path 1; the eccentric magnetic
system 22 is eccentrically arranged inside the magnetic roller 21, a strong magnetic area and a weak magnetic area are formed on the surface of the magnetic roller 21, and the strong magnetic
area is arranged at a separation area 13 of the back blowing air path 1, so that the materials can
roll under the action of the magnetic field and wind force, and nonmagnetic materials can be separated out; and 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 can roll under the action of the rotating magnetic field.
Specifically, the magnetic roller 21 may be a cylinder structure. To avoid the heating of the magnetic roller 21 in use, the magnetic roller 21 can be a nonmetallic cylinder made ofnonmetallic
materials such as glass fiber reinforced plastic, polyvinyl chloride, polypropylene chloride, etc.,
so as to prevent the materials from forming an eddy current, thus avoiding the heating of the magnetic roller 21. In order to prolong the service life of the magnetic roller 21, preferably, an outer wall of the magnetic roller 21 can be provided with a wear-resistant sheet, especially at the
position in contact with the materials. The wear-resistant sheet can be a wear-resistant ceramic
sheet, or other wear-resistant sheets, which is not limited in this embodiment. The magnetic roller 21 can be connected with a roller driving part 23, which is used to drive the magnetic roller 21 to
rotate, so as to convey the materials on the surface of the magnetic roller 21 into the back blowing
air path 1. In this embodiment, as shown in Fig. 2, the magnetic roller 21 rotates counterclockwise, so that the materials are conveyed counterclockwise along an upper outer wall into the back
blowing air path 1 on the left side of the magnetic roller 21. Of course, if the back blowing air path
1 is located on the right side of the magnetic roller 21, the magnetic roller 21 can rotate clockwise, so that the materials fall clockwise to be conveyed into the right back blowing air path for
separation. The cylinder driving part 23 may be a cylinder deceleration motor, and the cylinder driving part 23 can be connected with the magnetic roller 21 through a sprocket transmission
mechanism 25. The rotating speed range of the cylinder driving part 23 is 0-200 r/min.
Still referring to Fig. 2 and Figs. 5-7, the eccentric magnetic system 22 and the magnetic roller 21 are arranged eccentrically, that is, they are not coaxially arranged, so that a strong magnetic
area and a weak magnetic area can be formed on the outer surface of the magnetic roller 21. In
order to make the magnetic fields vertically symmetrical, the axes of the eccentric magnetic system 22 and the magnetic roller 21 can be on the same horizontal line, so that materials can be conveyed along with the magnetic roller 21 at the upper part, and at the lower part, with the attenuation of
the magnetic field, the weak magnetic materials and the strong magnetic materials fall in turn
during the counterclockwise rotation of the materials. Here, the strong magnetic area can be arranged at the separation area 13 of the back blowing air path 1, so that the materials can be
separated under the action of the magnetic field and wind force, in this way, the materials are
layered, and separation between the nonmagnetic materials and the magnetic materials is realized. In this embodiment, an area where a gap between the eccentric magnetic system 22 and the
magnetic roller 21 is small is the strong magnetic area. As shown in Fig. 2, a gap between the eccentric magnetic system 22 and a left end of the magnetic roller 21 is small, so that the left end of the eccentric magnetic system 22 and its adjacent area form the strong magnetic area, and other areas can be weak magnetic areas. In this embodiment, the eccentricity of the two can be determined according to the actual situation, which is not limited in this embodiment. The eccentric magnetic system 22 is rotatably arranged in the magnetic roller 21, so as to provide a rotating magnetic field, so that the materials can roll, especially, the materials can roll at a high speed in the strong magnetic area, so that the materials can be layered. In this embodiment, the rotating directions of the eccentric magnetic system 22 and the magnetic roller 21 are opposite, and the eccentric magnetic system 22 can rotate clockwise, which can increase the relative rotation speed between the two and improve the material layering effect. To realize the rotation of the eccentric magnetic system 22, preferably, the eccentric magnetic system 22 can be connected with a magnetic system driving part 24 for driving the eccentric magnetic system 22 to rotate. Here, the eccentric magnetic system 22 may be of a 360-degree full magnetic structure with N-S alternately arranged, and the magnetic system driving part 24 may be a six-pole motor, which drives the eccentric magnetic system 22 to rotate at a high speed, with an adjustable speed range of 0-1000 r/min.
In this embodiment, a gap exists between the magnetic roller 21 and a bottom end of the feeding area 31, which may be 2 mm, so that the magnetic roller 21 can rotate freely, thus realizing
the conveyance of materials, and making the materials rotate counterclockwise synchronously with
the magnetic roller 21. Referring to Fig. 8, which is a structural diagram of a material distributing plate provided by
an embodiment of the application. As shown in the figure, the material distributing plate 7
comprises a lower fixing plate 71 and an upper adjusting plate 72; and the upper adjusting plate 72 is connected to the top of the upper fixing plate 71, the position of the upper adjusting plate is adjustable in the height direction, and a locking piece 73 is arranged between the lower fixing plate
71 and the upper adjusting plate 72 for locking the lower fixing plate 71 and the upper adjusting
plate 72 when the upper adjusting plate 72 is well adjusted. Specifically, the lower fixing plate 71 can be fixed on the frame 3 by bolts, and the upper adjusting plate 72 can be vertically arranged
on the left side of the lower fixing plate 71 and slidably abut against a left side wall of the lower
fixing plate 71 along the left side wall of the lower fixing plate 71. The locking piece 73 may be a bolt component, so that when the upper adjusting plate 72 is well adjusted, the locking piece
penetrates through the lower fixing plate 71 and the upper adjusting plate 72, making the upper adjusting plate 72 fixed to the lower fixing plate 71 to form a telescopic plate structure. The working process of the dry-type pre-concentration machine is as follows. The feeding area 31 receives the materials, and then the materials are buffered by the feeding chute 311 and then fall on the surface of the magnetic roller 21; the magnetic roller 21 rotates counterclockwise and takes the materials into the separation area 13 through the material passing gap 6; at the same time, when the materials are in contact with the magnetic field, the materials roll at a high speed under the high-speed rotation of the eccentric magnetic system 22 with the N-S alternating field, and the materials will be automatically layered on the surface of the magnetic roller 21 during rolling, with the strong magnetic materials being in the innermost layer, the weak magnetic materials being in the middle layer and the nonmagnetic materials being in the outermost layer; the nonmagnetic fine powder materials in the outermost layer are hard to separate from the material layer in time due to their small particle size and small centrifugal force, however, with high-speed wind entering the separation area 13 through the air inlet and discharging area 11 of the back blowing air path 1, the nonmagnetic fine powder materials in the outermost layer will be taken away by the high-speed wind, most of the fine powder nonmagnetic materials will leave the surface of the magnetic roller 21 under the action of the wind and fill the space of the back blowing air path 1, and the fine powder nonmagnetic materials in the back blowing air path 1 can either be taken away by the wind to be collected by the dust collector or fall into the tailings area 32; most of the nonmagnetic granular materials are brought to the tailings area 32 with the rotation of the magnetic roller 21 and the attenuation of the magnetic field; and the weak magnetic minerals fall to the middlings area 33 with the rotation of the magnetic roller 21 and the attenuation of the magnetic field, and concentrates fall to the concentrate area 33 with the rotation of the magnetic roller 21 and the attenuation of the magnetic field, so that the ultra-fine materials are upgraded, and efficiently and fine separated. To sum up, according to the dry-type pre-concentration machine provided by this embodiment, the materials in the feeding area 31 are conveyed by the conveying action of the eccentric magnetic roller mechanism 2 into the back blowing air path 1 to roll, so that the materials are layered on the surface of the eccentric magnetic roller mechanism 2, with the strong magnetic materials being in the innermost layer, the weak magnetic materials being in the middle layer and the nonmagnetic materials being in the outermost layer; the nonmagnetic fine powder materials in the outermost layer are hard to separate from the material layer in time due to their small particle size and small centrifugal force, therefore, under the action of the reverse air in the back blowing air path 1, the nonmagnetic fine powder materials in the outermost layer will be taken away, most of the fine powder nonmagnetic materials will leave the surface of the eccentric magnetic roller mechanism 2 under the action of the air and fill the space of the back blowing air path 1, and the fine powder nonmagnetic materials in the back blowing air path 1 can either be taken away by the air or fall into the tailings area 32; most of the nonmagnetic granular materials are brought to the tailings area 32 with the rotation of the magnetic roller 21 and the attenuation of the magnetic field; and the weak magnetic minerals fall to the middlings area 33 with the rotation of the magnetic roller
21 and the attenuation of the magnetic field, and concentrates fall to the concentrate area 33 with
the rotation of the magnetic roller 21 and the attenuation of the magnetic field, so that graded, efficient and fine separation of the ultra-fine materials is realized.
The dry-type pre-concentration machine provides a complex separation environment coupled
with multiple physical fields for dry magnetic separation of ultra-fine materials, in which the materials are subjected to the combined action of multiple forces including gravity, centrifugal
force, magnetic overturning force, wind force, magnetic attraction, etc., thus realizing graded,
efficient and fine separation and solving the problem that the separation index of a traditional dry separator for ultra-fine materials such as undersize materials of a high-pressure roller mill, oversize
materials of a vertical mill and undersize materials of a hammer crusher is not up to standard, and further, the purposes of increasing the rejection rate, improving the metal grade and reducing the
production cost are realized.
It should be noted that in the description of this application, the orientation or position relationship indicated by the terms "upper", "lower", "front", nleft",right", "inner" and "outer"
are based on the orientation or position relationship shown in the drawings, only for convenience
of description, and do not indicate or imply that the indicated device or element must have a specific orientation, or be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of this application.
In addition, it should also be noted that in the description of this application, unless otherwise specified and limited, the terms "install" and "connect" should be understood in a broad sense, for example, they may be fixed connection, detachable connection, integrated connection, direct
connection, indirect connection through an intermediate medium, or internal communication
between two elements. For those skilled in the art, the specific meanings of the above terms in this application may be understood according to specific situations.
Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims of the application and their equivalents, the application is also intended to comprise these modifications and variations.
Claims (10)
1. A dry-type pre-concentration machine, comprising a back blowing air path (1) and an eccentric magnetic roller mechanism (2), wherein the eccentric magnetic roller mechanism (2) is partially arranged in the back blowing air path (1), the back blowing air path (1) is used for blowing reverse air opposite to a material conveying direction to a 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 (31) is arranged above the eccentric magnetic roller mechanism (2); a tailings area (32), a middlings area (33) and a concentrate area (34) are arranged below the eccentric magnetic roller mechanism (2); materials in the feeding area (31) are conveyed by the conveying action of the eccentric magnetic roller mechanism (2) into the back blowing air path (1) to roll, so that the materials are layered on the surface of the eccentric magnetic roller mechanism (2), with strong magnetic materials being in an innermost layer, weak magnetic materials being in a middle layer, and nonmagnetic materials being in an outermost layer; the nonmagnetic materials in the outermost layer leave the surface of the eccentric magnetic roller mechanism (2) to enter the tailings area (32) under the action of the reverse air of the back blowing air path (1) or be blown out with the air; and the weak magnetic materials and the strong magnetic materials sequentially enter the middlings area (33) and the concentrate area (34) under the magnetic field and conveying action of the eccentric magnetic roller mechanism (2).
2. The dry-type pre-concentration machine according to claim 1, wherein the eccentric magnetic roller mechanism (2) comprises a magnetic roller (21) and an eccentric magnetic system (22); 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 materials on a surface of the magnetic roller (21) into the back blowing air path (1); the eccentric magnetic system (22) is eccentrically arranged inside the magnetic roller (21), a strong magnetic area and a weak magnetic area are formed on the surface of the magnetic roller (21), and the strong magnetic area is arranged at a separation area of the back blowing air path (1), so that the materials can roll under the action of the magnetic field and the air, and nonmagnetic materials can be separated out; 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) can roll under the action of the rotating magnetic field.
3. The dry-type pre-concentration machine according to claim 2, wherein the eccentric magnetic system (22) is connected with a magnetic system driving part (24) for driving the eccentric magnetic system (22) to rotate.
4. The dry-type pre-concentration machine according to claim 2, wherein
the magnetic roller (21) is a nonmetallic cylinder structure; and/or, the back blowing air path (1) is a nonmetallic air path; and/or,
the feeding area (31) is a nonmetallic feeding area.
5. The dry-type pre-concentration machine according to any one of claims 1-4, wherein the back blowing air path (1) comprises:
an air inlet and discharging area (11) arranged on a lower side of the eccentric magnetic roller
mechanism (2); an air and material outlet area (12) arranged on an upper side of the eccentric magnetic roller
mechanism (2); and a separation area (13) arranged between the air inlet and discharging area (11) and the air and
material outlet area (12).
6. The dry-type pre-concentration machine according to claim 6, wherein the strong magnetic area of the eccentric magnetic roller mechanism (2) is arranged at the
separation area (13) of the back blowing air path (1), so that materials roll and are separated under
the action of the magnetic field and the air.
7. The dry-type pre-concentration machine according to any one of claims 1-4, wherein a material distributing plate (7) is arranged below the eccentric magnetic roller mechanism
(2) at one side of the back blowing air path (1), and a plurality of discharging areas are formed at
one side of an air inlet of the back blowing air path (1) through partitioning to separate different magnetic materials; and
the material distributing plate (7) is adjustably arranged below the eccentric magnetic roller
mechanism (2) in a horizontal direction, and the material distributing plate (7) is a telescopic plate structure used for adjusting a vertical height and a material distributing position.
8. The dry-type pre-concentration machine according to claim 7, wherein a side wall of the distributing plate (7), an inner wall of the back blowing air path (1) and/or an outer wall of the eccentric magnetic roller mechanism (2) is provided with a wear-resistant sheet.
9. The dry-type pre-concentration machine according to any one of claims 1-4, wherein the feeding area (31) is provided with a feeding chute (311) which is used for buffering the materials input through the feeding area (31).
10. The dry-type pre-concentration machine according to any one of claims 1-4, wherein a cleaning brush (4) and/or a cleaning scraper (5) located on a periphery of the eccentric magnetic roller mechanism (2) is arranged outside the back blowing air path (1) to clean the materials attached to the surface of the eccentric magnetic roller mechanism (2).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111241839.0A CN113798059A (en) | 2021-10-25 | 2021-10-25 | Dry-type preselection machine |
| CN202122568727.8U CN216173205U (en) | 2021-10-25 | 2021-10-25 | Dry-type preselection machine |
| CN202122568727.8 | 2021-10-25 | ||
| CN202111241839.0 | 2021-10-25 | ||
| PCT/CN2021/138774 WO2023070893A1 (en) | 2021-10-25 | 2021-12-16 | Dry-type pre-concentration machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2021471055A1 AU2021471055A1 (en) | 2023-06-29 |
| AU2021471055A9 true AU2021471055A9 (en) | 2024-07-11 |
Family
ID=86160084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021471055A Pending AU2021471055A1 (en) | 2021-10-25 | 2021-12-16 | Dry-type pre-concentration machine |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2021471055A1 (en) |
| CL (1) | CL2023001445A1 (en) |
| WO (1) | WO2023070893A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118108313B (en) * | 2024-04-30 | 2024-07-09 | 山东奥鲁机械有限公司 | Separated efficient chip collecting device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5412800B2 (en) * | 2008-11-17 | 2014-02-12 | 株式会社Ｉｈｉ | Vertical pulverized coal mill |
| CN105921270B (en) * | 2016-05-10 | 2018-10-12 | 中南大学 | Wind-force belt magnetic separator |
| CN107159458A (en) * | 2017-07-08 | 2017-09-15 | 山东华特磁电科技股份有限公司 | Fine ore wind-force dry-type magnetic extractor |
| CN210252668U (en) * | 2019-05-31 | 2020-04-07 | 镇江新宇固体废物处置有限公司 | Metal magnetic separation system of hazardous waste incineration slag |
| CN110947496B (en) * | 2019-12-10 | 2024-07-12 | 成都利君实业股份有限公司 | Magnetic ore dry grinding and sorting system |
-
2021
- 2021-12-16 WO PCT/CN2021/138774 patent/WO2023070893A1/en unknown
- 2021-12-16 AU AU2021471055A patent/AU2021471055A1/en active Pending
-
2023
- 2023-05-18 CL CL2023001445A patent/CL2023001445A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023070893A1 (en) | 2023-05-04 |
| CL2023001445A1 (en) | 2023-11-17 |
| AU2021471055A1 (en) | 2023-06-29 |
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