CN108787161B - Multistage dry-type magnet separator - Google Patents

Multistage dry-type magnet separator Download PDF

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Publication number
CN108787161B
CN108787161B CN201810633618.XA CN201810633618A CN108787161B CN 108787161 B CN108787161 B CN 108787161B CN 201810633618 A CN201810633618 A CN 201810633618A CN 108787161 B CN108787161 B CN 108787161B
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magnetic separation
primary
blocking plate
conveyor
roller
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CN108787161A (en
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周文君
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Jiangyin Shangshi Engineering Equipment Co ltd
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Jiangyin Shangshi Engineering Equipment Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/16Magnetic separation acting directly on the substance being separated with material carriers in the form of belts
    • B03C1/18Magnetic separation acting directly on the substance being separated with material carriers in the form of belts with magnets moving during operation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/025High gradient magnetic separators
    • B03C1/031Component parts; Auxiliary operations
    • B03C1/033Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0332Component parts; Auxiliary operations characterised by the magnetic circuit using permanent magnets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30Belts or like endless load-carriers
    • B65G15/32Belts or like endless load-carriers made of rubber or plastics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00Details of magnetic or electrostatic separation
    • B03C2201/20Magnetic separation whereby the particles to be separated are in solid form

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branching, Merging, And Special Transfer Between Conveyors (AREA)
  • Sorting Of Articles (AREA)

Abstract

The invention relates to a multistage dry magnetic separator which is characterized by comprising four layers of conveying mechanisms which are sequentially arranged from top to bottom, wherein each four layers of conveying mechanisms sequentially comprise a first-layer primary magnetic separation main conveyor (4), a second-layer primary auxiliary conveyor (5), a third-layer secondary magnetic separation main conveyor (6) and a fourth-layer secondary auxiliary conveyor (7) from top to bottom; the multi-stage dry magnetic separator is capable of separating concentrate with higher iron content, middlings with medium iron content and tailings with lower iron content, wherein the concentrate is separated from the right section at the bottom of the multi-stage dry magnetic separator, a concentrate discharge port (9) is formed in the right section of a corresponding lower frame (3), middlings are separated from the middle section at the bottom of the multi-stage dry magnetic separator, and a middling discharge port (10) is formed in the middle section of the corresponding lower frame (3). The invention has the advantages of high magnetic separation efficiency, good adaptability, good use stability and convenient maintenance.

Description

Multistage dry-type magnet separator
Technical Field
The invention relates to a multistage dry magnetic separator, and belongs to the field of magnetic separation machinery.
Background
Compared with the global iron ore, the iron ore resources in China have a large amount of low-grade iron ore mineral resources, and in recent years, in order to fully utilize the existing low-grade magnetite mineral resources in China to make up for the shortages of the iron ore resources in China, the existing enterprises in China intervene in the development process of the low-grade magnetite mineral resources.
The existing magnetic separation process cannot fully mine magnetite, and mineral waste is caused to a certain extent. There are several drawbacks to the dry magnetic separators available in the market:
1. the magnetic separation classification sensitivity is poor, more times of magnetic separation operation are needed, and the magnetic separation efficiency is low;
2. the magnetic separator of the same type has limited magnetic property adjusting capability, so that specific adjustment can not be performed according to specific conditions of different mines, and the adaptability is poor;
3. the conveyer belt for ore conveying of the traditional magnetic separator is generally a belt, and a carrier roller is arranged on the inner side of the belt, so that the working environment is bad, dust is large, the rotating speed is high, a carrier roller bearing is easy to damage and seize, the outer surface of the carrier roller is worn, cracked and cut, the belt is damaged, the maintenance cost is high, and the production is severely restricted;
4. the traditional magnetic separator is formed by installing various parts on a main frame, when faults occur, the whole magnetic separator needs to be disassembled and maintained by stopping, the maintenance period is long, the time is wasted, and the production efficiency is reduced.
Therefore, it is important to find a multi-stage dry magnetic separator with high magnetic separation efficiency, good adaptability, good use stability and convenient maintenance.
Disclosure of Invention
The invention aims to overcome the defects and provide the multistage dry magnetic separator which is high in magnetic separation efficiency, good in adaptability, good in use stability and convenient to maintain.
The purpose of the invention is realized in the following way:
the utility model provides a multistage dry-type magnet separator, it includes a plurality of frames that the modularization was built, is provided with the magnetic separation mechanism that is used for hierarchical magnetic separation in every frame, and the magnetic separation mechanism in every frame constitutes a multistage dry-type magnet separator that is used for hierarchical magnetic separation.
The plurality of frames constructed in a modularized manner are provided with an upper frame, a middle frame and a lower frame which are arranged up, down and up; the upper frame, the middle frame and the lower frame are respectively provided with a protection panel, and a plurality of access holes are formed in the protection panels;
the magnetic separation mechanisms for the hierarchical magnetic separation in the frames which are built in a modularized mode comprise four layers of conveying mechanisms which are sequentially arranged from top to bottom, wherein each four layers of conveying mechanisms sequentially comprise a first-level magnetic separation main conveyor of a first layer, a second-level auxiliary conveyor of a second layer, a third-level second magnetic separation main conveyor of a third layer and a fourth-level second auxiliary conveyor of a fourth layer from top to bottom;
an ore feed inlet for ore feed to be beneficiated of the multi-stage dry magnetic separator is positioned right above the right section of the primary magnetic separation main conveyor, and the right section of the corresponding upper frame is provided with the ore feed inlet;
a multistage dry magnetic separator can separate out concentrate with higher iron content, middling with medium iron content and tailings with lower iron content,
wherein the concentrate is selected from the right section at the bottom of the multi-stage dry magnetic separator, the right section of the corresponding lower frame is provided with a concentrate discharge port,
wherein middlings are selected from the middle section at the bottom of the multi-stage dry magnetic separator, and a middling discharge port is formed in the middle section of the corresponding lower frame.
The primary magnetic separation main conveyor comprises a transverse primary magnetic separation main frame, wherein a primary magnetic separation left roller and a primary magnetic separation right roller are respectively arranged at the left end and the right end of the primary magnetic separation main frame, the primary magnetic separation left roller is a magnetic roller, the primary magnetic separation right roller is a non-magnetic roller, a primary conveyor belt is sleeved between the primary magnetic separation left roller and the primary magnetic separation right roller, a plurality of groups of primary magnets are respectively arranged upwards and downwards from left to right in the middle of the primary magnetic separation main frame, the plurality of groups of primary magnets are arranged at intervals left and right, the upward primary magnets are of a U-shaped structure, the downward primary magnets are of an inverted U-shaped structure, the upward primary magnets are uniform in magnetism, the upward primary magnets are arranged in a magnetic staggered manner, and the downward primary magnets are gradually reduced from left to right;
the first-stage auxiliary conveyor comprises a transverse first-stage auxiliary conveying rack, a first-stage auxiliary conveying left roller and a first-stage auxiliary conveying right roller are respectively arranged at the left end and the right end of the first-stage auxiliary conveying rack, the first-stage auxiliary conveying left roller and the first-stage auxiliary conveying right roller are both nonmagnetic rollers, a first-stage auxiliary conveying belt is sleeved between the first-stage auxiliary conveying left roller and the first-stage auxiliary conveying right roller, the first-stage auxiliary conveyor is positioned right below the left section of the first-stage magnetic separation main conveyor, and the first-stage auxiliary conveying left roller is positioned right below the first-stage magnetic separation left roller;
the secondary magnetic separation main conveyor has a structure similar to that of the primary magnetic separation main conveyor, the secondary magnetic separation main conveyor comprises a transverse secondary magnetic separation main frame, a secondary magnetic separation left roller and a secondary magnetic separation right roller are respectively arranged at the left end and the right end of the secondary magnetic separation main frame, the secondary magnetic separation left roller is a magnetic roller, the secondary magnetic separation right roller is a non-magnetic roller, a secondary conveying belt is sleeved between the secondary magnetic separation left roller and the secondary magnetic separation right roller, a plurality of groups of secondary magnets are respectively arranged upwards and downwards from left to right in the middle of the secondary magnetic separation main frame, the groups of secondary magnets are arranged at intervals left and right, the upward secondary magnets are of a U-shaped structure, the downward secondary magnets are of an inverted U-shaped structure, the upward secondary magnets are uniform in magnetism, the upward secondary magnets are arranged in a staggered manner, and the magnetism of the downward secondary magnets is gradually reduced from left to right;
the secondary auxiliary conveyor comprises a transverse secondary auxiliary conveying rack, a secondary auxiliary conveying left roller and a secondary auxiliary conveying right roller are respectively arranged at the left end and the right end of the secondary auxiliary conveying rack, the secondary auxiliary conveying left roller and the secondary auxiliary conveying right roller are both nonmagnetic rollers, a secondary auxiliary conveying belt is sleeved between the secondary auxiliary conveying left roller and the secondary auxiliary conveying right roller, the secondary auxiliary conveyor is positioned right below the left middle section of the secondary magnetic separation main conveyor, and the secondary auxiliary conveying left roller is positioned right below the secondary magnetic separation left roller;
the right side of the secondary auxiliary conveyor is provided with a scavenging roller, the scavenging roller is a magnetic roller, and the top height of the scavenging roller is lower than that of the secondary auxiliary conveyor.
The tailings are selected from two parts at the bottom of the multi-stage dry magnetic separator, wherein the first tailings are selected from the left bottom section of the multi-stage dry magnetic separator, the corresponding left bottom section of the lower frame is provided with a first tailings discharge port, the second tailings are selected from the middle bottom section of the multi-stage dry magnetic separator, the corresponding middle bottom section of the lower frame is provided with a second tailings discharge port, the second tailings discharge port is positioned at the left side of the middling discharge port, and the second tailings discharge port and the middling discharge port are respectively positioned at the left side and the right side of the scavenging roller.
A first blocking plate with the same height as the first blocking plate is arranged at the left side of the primary magnetic separation main conveyor, the first blocking plate is an inclined plate extending from the upper left to the lower right, and the upper end, the front end and the rear end of the first blocking plate are connected with an upper frame;
the right side of the primary auxiliary conveyor is provided with a second blocking plate with the same height as the first blocking plate, the second blocking plate is positioned below the right section of the primary magnetic separation main conveyor, the second blocking plate is an inclined plate extending from the upper right to the lower left, and the front end and the rear end of the second blocking plate are connected with the middle frame;
a third blocking plate with the same height as the second magnetic separation main conveyor is arranged at the left side of the second magnetic separation main conveyor, the third blocking plate is an inclined plate extending from the upper left to the lower right, and the upper end and the front end and the rear end of the third blocking plate are connected with a middle frame;
a fourth blocking plate is arranged on the right side of the second blocking plate, the height of the fourth blocking plate is consistent with the heights of the primary auxiliary conveyor and the secondary magnetic separation main conveyor, the fourth blocking plate is an inclined plate extending from the upper left to the lower right, and the upper end of the fourth blocking plate is connected with the upper end of the second blocking plate;
a fifth blocking plate is arranged below the third blocking plate, the fifth blocking plate is an inclined plate extending from the upper right to the lower left, the fifth blocking plate is positioned at the left of the secondary auxiliary conveyor, a sixth blocking plate is arranged below the fifth blocking plate, the sixth blocking plate is an inclined plate extending from the upper left to the lower right, the front end and the rear end of the fifth blocking plate and the front end and the rear end of the sixth blocking plate are respectively connected to the lower frame, the lower end of the sixth blocking plate is connected with the first tailing discharge port, and the sixth blocking plate and a vertical first vertical plate at the right of the sixth blocking plate guide tailings between the sixth blocking plate and the sixth vertical plate to the first tailing discharge port;
a seventh blocking plate obliquely arranged at the left lower part is arranged below the fourth blocking plate, an eighth blocking plate obliquely arranged at the right lower part is arranged at the right side of the seventh blocking plate, the fourth blocking plate, the seventh blocking plate and the eighth blocking plate form an 'entering' shape structure, the front end and the rear end of the seventh blocking plate and the eighth blocking plate are connected with the lower frame, the heights of the seventh blocking plate and the eighth blocking plate are consistent with the heights of the lower frame, the inclination of the eighth blocking plate is consistent with the inclination of the fourth blocking plate, and the eighth blocking plate and a ninth blocking plate obliquely arranged at the left lower part of the eighth blocking plate are used for guiding concentrate between the eighth blocking plate and the eighth blocking plate to a concentrate discharge port;
the left side of the scavenging roller is provided with a second vertical plate, the lower side of the scavenging roller is provided with a tenth baffle plate at the lower left side of the slant and an eleventh baffle plate at the lower right side of the slant, and the tenth baffle plate and the eleventh baffle plate are arranged in bilateral symmetry.
The middle part of the primary magnetic separation main frame is respectively provided with a plurality of groups of primary conveyor belt supporting blocks from left to right, the groups of primary conveyor belt supporting blocks are arranged at intervals left and right, the groups of primary conveyor belt supporting blocks are respectively positioned in gaps of adjacent primary magnets, the top end of the upward primary conveyor belt supporting block is higher than the height of the upward primary magnet, the top end of the upward primary conveyor belt supporting block is contacted with the inner side surface of the primary conveyor belt above, the bottom end of the downward primary conveyor belt supporting block is lower than the height of the downward primary magnet, the bottom end of the downward primary conveyor belt supporting block is contacted with the inner side surface of the primary conveyor belt below, and the primary conveyor belt supporting block is made of graphite;
the middle part of second grade magnetic separation main frame is upwards and downwards provided with multiunit second grade conveyer belt supporting shoe from a left side to the right side respectively, multiunit second grade conveyer belt supporting shoe left and right side interval arrangement, and multiunit second grade conveyer belt supporting shoe is arranged in adjacent second grade magnet's clearance respectively, and ascending second grade conveyer belt supporting shoe's top is higher than ascending second grade magnet's height, and ascending second grade conveyer belt supporting shoe's top and the medial surface contact of top second grade conveyer belt, and decurrent second grade conveyer belt supporting shoe's bottom is less than decurrent second grade magnet's height, and decurrent second grade conveyer belt supporting shoe's bottom and the medial surface contact of below second grade conveyer belt, the second grade conveyer belt supporting shoe is graphite material.
The primary magnet is an electric permanent magnet,
the secondary magnet is an electro-permanent magnet.
The top height of the scavenging roller is positioned at the center line height of the secondary auxiliary conveying frame of the secondary auxiliary conveyor.
The secondary magnetic separation main conveyor is located under the primary auxiliary conveyor, the length of the secondary magnetic separation main conveyor is longer than that of the primary auxiliary conveyor, the left end of the secondary magnetic separation main conveyor slightly exceeds the left end of the primary magnetic separation main conveyor, the magnetism of the secondary magnet of the secondary magnetic separation main conveyor is stronger than that of the primary magnet of the primary magnetic separation main conveyor, and the number of the secondary magnets of the secondary magnetic separation main conveyor is smaller than that of the primary magnets of the primary magnetic separation main conveyor.
Compared with the prior art, the invention has the beneficial effects that:
1. the multi-pass magnetic separation is integrated on a whole dry magnetic separator, so that the magnetic separation efficiency is high;
2. according to different specific conditions of mines, the magnetic force can be adjusted only by adjusting the electrifying quantity of the permanent magnet, so that the magnetic separation requirements of different working conditions are met, and the adaptability is good;
3. the special belt is adopted as the conveying belt, so that the tensile strength is high, the elastic deformation is small, the wear resistance is super strong, the wear resistance and scratch resistance are realized, the supporting block of the conveying belt adopts wear-resistant ceramics, the wear-resistant ceramics and the inlet end of the belt adopt graphite-based guide bars for transition, the lubricant is realized, the service life of the conveying belt is greatly prolonged, the frequent replacement is not needed, and the normal production is ensured;
4. because the complete machine includes a plurality of frames that the modularization was built, is provided with the magnetic separation mechanism that is used for hierarchical magnetic separation in every frame for any mechanism is when breaking down, need not wholly tear open the machine, and only need demolish corresponding module and can change or maintain, maintenance cycle is short, save time, improves production efficiency.
In conclusion, the magnetic separation device has the advantages of high magnetic separation efficiency, good adaptability, good use stability and convenience in maintenance.
Drawings
Fig. 1 is a schematic view of an external frame of a multi-stage dry magnetic separator.
Fig. 2 is a schematic diagram of the internal structure of a multi-stage dry magnetic separator.
Fig. 3 is a schematic diagram of the primary magnetic separation main conveyor in fig. 2.
Fig. 4 is a schematic structural view of the primary auxiliary conveyor in fig. 2.
Fig. 5 is a schematic diagram of the structure of the main conveyor for two-stage magnetic separation in fig. 2.
Fig. 6 is a schematic structural view of the secondary auxiliary conveyor in fig. 2.
Fig. 7 is a B-B cross-sectional view in fig. 2.
Fig. 8 is a C-C cross-sectional view of fig. 2.
Fig. 9 is a D-D sectional view of fig. 2.
Wherein:
upper frame 1
Middle frame 2
Lower frame 3
The primary magnetic separation main conveyor 4, the primary magnetic separation main frame 4.1, the primary magnetic separation left roller 4.2, the primary magnetic separation right roller 4.3, the primary conveyor belt 4.4, the primary magnet 4.5 and the primary conveyor belt supporting block 4.6
The primary auxiliary conveyor 5, the primary auxiliary conveyor frame 5.1, the primary auxiliary conveying left roller 5.2, the primary auxiliary conveying right roller 5.3 and the primary auxiliary conveying belt 5.4
A secondary magnetic separation main conveyor 6.1, a secondary magnetic separation main frame 6.1, a secondary magnetic separation left roller 6.2, a secondary magnetic separation right roller 6.3, a secondary conveying belt 6.4, a secondary magnet 6.5 and a secondary conveying belt supporting block 6.6
The secondary auxiliary conveyor 7, a secondary auxiliary conveying rack 7.1, a secondary auxiliary conveying left roller 7.2, a secondary auxiliary conveying right roller 7.3 and a secondary auxiliary conveying belt 7.4
Scavenging roller 8
Concentrate outlet 9
Middling material outlet 10
First tailing discharge outlet 11
Second tailing discharge outlet 12
First baffle 13
Second baffle plate 14
Third baffle 15
Fourth baffle 16
Fifth baffle 17
Sixth baffle plate 18
First riser 19
Seventh baffle 20
Eighth baffle plate 21
Ninth baffle 22
Tenth baffle plate 23
Eleventh baffle plate 24
A second riser 25.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-9, the multi-stage dry magnetic separator comprises a plurality of frames which are built in a modularized mode, wherein a magnetic separation mechanism for grading magnetic separation is arranged in each frame, and the magnetic separation mechanism in each frame forms a multi-stage dry magnetic separator for grading magnetic separation;
as a preference, the plurality of frames built up modularly in the present embodiment has an upper frame 1, a middle frame 2, and a lower frame 3 arranged up and down; the upper frame 1, the middle frame 2 and the lower frame 3 are respectively provided with a protection panel, and a plurality of overhaul holes are formed in the protection panels;
as one preferable, the magnetic separation mechanism for the hierarchical magnetic separation in the plurality of frames which are built up in a modularized manner comprises four layers of conveying mechanisms which are sequentially arranged from top to bottom, wherein the four layers of conveying mechanisms sequentially comprise a first-layer primary magnetic separation main conveyor 4, a second-layer primary auxiliary conveyor 5, a third-layer secondary magnetic separation main conveyor 6 and a fourth-layer secondary auxiliary conveyor 7 from top to bottom;
the primary magnetic separation main conveyor 4 comprises a transverse primary magnetic separation main frame 4.1, a primary magnetic separation left roller 4.2 and a primary magnetic separation right roller 4.3 are respectively arranged at the left end and the right end of the primary magnetic separation main frame 4.1, wherein the primary magnetic separation left roller 4.2 is a magnetic roller, the primary magnetic separation right roller 4.3 is a non-magnetic roller, a primary conveying belt 4.4 is sleeved between the primary magnetic separation left roller 4.2 and the primary magnetic separation right roller 4.3, the primary conveying belt 4.4 is a special material belt, the special material belt is a belt with the model AE140/3UO/U4HMTBLACK produced by Germany Boschin conveying technology (China), and the belt is made of Kevlar fiber and PU plastic rubber. The middle part of the primary magnetic separation main frame 4.1 is respectively provided with a plurality of groups of primary magnets 4.5 upwards and downwards from left to right, the plurality of groups of primary magnets 4.5 are used for providing a certain attraction force to ores on the primary conveying belt 4.4 so as to enable the ores to be adsorbed on the primary conveying belt 4.4, the plurality of groups of primary magnets 4.5 are arranged at intervals left and right, the upward primary magnets 4.5 are of a U-shaped structure, the downward primary magnets 4.5 are of an inverted U-shaped structure, the upward primary magnets 4.5 have uniform magnetism, the magnetism of the upward primary magnets 4.5 are staggered, the magnetism of the downward primary magnets 4.5 is gradually reduced from left to right, as a preference, the downward primary magnets 4.5 are provided with eight groups of primary conveying belt supporting blocks 4.6, the middle part of the primary magnetic separation main frame 4.1 is respectively provided with a plurality of groups of primary conveying belt supporting blocks from left to right, the multiple groups of first-stage conveying belt supporting blocks 4.6 are arranged at intervals left and right, the multiple groups of first-stage conveying belt supporting blocks 4.6 are respectively positioned in gaps of adjacent first-stage magnets 4.5, the top end of each upward first-stage conveying belt supporting block 4.6 is higher than the height of each upward first-stage magnet 4.5, the top end of each upward first-stage conveying belt supporting block 4.6 is in contact with the inner side surface of each upward first-stage conveying belt 4.4, the bottom end of each downward first-stage conveying belt supporting block 4.6 is lower than the height of each downward first-stage magnet 4.5, the bottom end of each downward first-stage conveying belt supporting block 4.6 is in contact with the inner side surface of each downward first-stage conveying belt 4.4, each first-stage conveying belt supporting block 4.6 is made of wear-resistant ceramics, and the inlet end of each wear-resistant ceramics, which is in contact with a belt, adopts graphite-based guide bar;
the primary auxiliary conveyor 5 comprises a transverse primary auxiliary conveyor frame 5.1, a primary auxiliary conveying left roller 5.2 and a primary auxiliary conveying right roller 5.3 are respectively arranged at the left end and the right end of the primary auxiliary conveyor frame 5.1, the primary auxiliary conveying left roller 5.2 and the primary auxiliary conveying right roller 5.3 are non-magnetic rollers, a primary auxiliary conveying belt 5.4 is sleeved between the primary auxiliary conveying left roller 5.2 and the primary auxiliary conveying right roller 5.3, the primary auxiliary conveying belt 5.4 is a special material belt, the primary auxiliary conveyor 5 is positioned under the left section of the primary magnetic separation main conveyor 4, and the primary auxiliary conveying left roller 5.2 is positioned under the primary magnetic separation left roller 4.2;
the secondary magnetic separation main conveyor 6 has a structure similar to the primary magnetic separation main conveyor 4, the secondary magnetic separation main conveyor 6 comprises a transverse secondary magnetic separation main frame 6.1, the left end and the right end of the secondary magnetic separation main frame 6.1 are respectively provided with a secondary magnetic separation left roller 6.2 and a secondary magnetic separation right roller 6.3, wherein the secondary magnetic separation left roller 6.2 is a magnetic roller, the secondary magnetic separation right roller 6.3 is a non-magnetic roller, a secondary conveyor belt 6.4 is sleeved between the secondary magnetic separation left roller 6.2 and the secondary magnetic separation right roller 6.3, the secondary conveyor belt 6.4 is a special material belt, the middle part of the secondary magnetic separation main frame 6.1 is respectively provided with a plurality of groups of secondary magnets 6.5 upwards and downwards from left to right, the groups of secondary magnets 6.5 are used for providing a certain attraction force to ores on the secondary conveyor belt 6.4 so as to enable the ores to be adsorbed on the secondary conveyor belt 6.4, the plurality of groups of secondary magnets 6.5 are arranged at intervals, the upward secondary magnets 6.5 are in a U-shaped structure, the downward secondary magnets 6.5 are of inverted U-shaped structures, the magnetism of the upward secondary magnets 6.5 is uniform, the magnetism of the upward secondary magnets 6.5 is staggered, the magnetism of the downward secondary magnets 6.5 is gradually reduced from left to right, the secondary magnets 6.5 are electro-permanent magnets, a plurality of groups of secondary conveyor belt supporting blocks 6.6 are respectively arranged at intervals from left to right upwards and downwards in the middle of the secondary magnetic separation main frame 6.1, the groups of secondary conveyor belt supporting blocks 6.6 are respectively arranged at intervals from left to right, the groups of secondary conveyor belt supporting blocks 6.6 are respectively positioned in the gaps of the adjacent secondary magnets 6.5, the top ends of the upward secondary conveyor belt supporting blocks 6.6 are higher than the height of the upward secondary magnets 6.5, the top ends of the upward secondary conveyor belt supporting blocks 6.6 are in contact with the inner side surface of the upper secondary conveyor belt 6.4, the bottom ends of the downward secondary conveyor belt supporting blocks 6.6 are lower than the height of the downward secondary conveyor belt supporting blocks 6.5, the bottom end of the downward secondary conveyor belt supporting block 6.6 is in contact with the inner side surface of the secondary conveyor belt 6.4 below, the secondary conveyor belt supporting block 6.6 is made of wear-resistant ceramics, and the inlet end of the wear-resistant ceramics, which is in contact with the belt, is in transition by adopting a graphite-based conducting bar; the secondary magnetic separation main conveyor 6 is positioned right below the primary auxiliary conveyor 5, the length of the secondary magnetic separation main conveyor 6 is longer than that of the primary auxiliary conveyor 5, the left end of the secondary magnetic separation main conveyor 6 slightly exceeds the left end of the primary magnetic separation main conveyor 4, the magnetism of the secondary magnet 6.5 of the secondary magnetic separation main conveyor 6 is stronger than that of the primary magnet 4.5 of the primary magnetic separation main conveyor 4, and the number of the secondary magnets 6.5 of the secondary magnetic separation main conveyor 6 is smaller than that of the primary magnets 4.5 of the primary magnetic separation main conveyor 4;
the secondary auxiliary conveyor 7 comprises a transverse secondary auxiliary conveying rack 7.1, a secondary auxiliary conveying left roller 7.2 and a secondary auxiliary conveying right roller 7.3 are respectively arranged at the left end and the right end of the secondary auxiliary conveying rack 7.1, the secondary auxiliary conveying left roller 7.2 and the secondary auxiliary conveying right roller 7.3 are both non-magnetic rollers, a secondary auxiliary conveying belt 7.4 is sleeved between the secondary auxiliary conveying left roller 7.2 and the secondary auxiliary conveying right roller 7.3, the secondary auxiliary conveying belt 7.4 is a special material belt, the secondary auxiliary conveyor 7 is positioned right below the left middle section of the secondary magnetic separation main conveyor 6, and the secondary auxiliary conveying left roller 7.2 is positioned right below the secondary magnetic separation left roller 7.2;
a scavenging roller 8 is arranged on the right side of the secondary auxiliary conveyor 7, the scavenging roller 8 is a magnetic roller, the top height of the scavenging roller 8 is lower than the top height of the secondary auxiliary conveyor 7, and preferably, the top height of the scavenging roller 8 is positioned at the center line height of a secondary auxiliary conveyor frame 7.1 of the secondary auxiliary conveyor 7;
wherein the primary magnetic separation main conveyor 4 is positioned in the upper frame 1, the primary auxiliary conveyor 5 and the secondary magnetic separation main conveyor 6 are positioned in the middle frame 2, and the secondary auxiliary conveyor 7 and the scavenging roller 8 are positioned in the lower frame 3;
an ore feed inlet for ore feed to be beneficiated of the multi-stage dry magnetic separator is positioned right above the right section of the primary magnetic separation main conveyor 4, and the right section of the corresponding upper frame 1 is provided with an ore feed inlet;
a multistage dry magnetic separator can separate out concentrate with higher iron content, middling with medium iron content and tailings with lower iron content,
wherein the concentrate is selected from the right section at the bottom of the multi-stage dry magnetic separator, the right section of the corresponding lower frame 3 is provided with a concentrate discharge port 9,
wherein middlings are selected from the middle section at the bottom of the multi-stage dry magnetic separator, a middling discharging port 10 is arranged at the middle section of the corresponding lower frame 3,
the tailings are selected from two parts at the bottom of the multi-stage dry magnetic separator, wherein the first tailings are selected from the left bottom section of the multi-stage dry magnetic separator, the left section of the corresponding lower frame 3 is provided with a first tailings discharge port 11, the second tailings are selected from the middle bottom section of the multi-stage dry magnetic separator, the corresponding lower frame 3 is provided with a second tailings discharge port 12, the second tailings discharge port 12 is positioned at the left side of the middling discharge port 10, and the second tailings discharge port 12 and the middling discharge port 10 are respectively positioned at the left side and the right side of the scavenging roller 8;
a first blocking plate 13 with the same height as the first blocking plate 13 is arranged at the left side of the primary magnetic separation main conveyor 4, the first blocking plate 13 is an inclined plate extending from the upper left to the lower right, the upper end and the front and rear ends of the first blocking plate 13 are connected with the upper frame 1, and the first blocking plate 13 is used for blocking and guiding tailings transported by the upper layer of the primary magnetic separation main conveyor 4 so that the tailings at the position fall;
the right side of the primary auxiliary conveyor 5 is provided with a second blocking plate 14 with the same height, the second blocking plate 14 is positioned below the right section of the primary magnetic separation main conveyor 4, the second blocking plate 14 is an inclined plate extending from the upper right to the lower left, the front end and the rear end of the second blocking plate 14 are connected with the middle frame 2, and the second blocking plate 14 is used for blocking and guiding non-concentrate (middlings and tailings are collectively called non-concentrate) transported by the lower layer of the primary magnetic separation main conveyor 4, so that the non-concentrate at the position falls to the upper layer of the secondary magnetic separation main conveyor 6;
the left side of the secondary magnetic separation main conveyor 6 is provided with a third blocking plate 15 with the same height, the third blocking plate 15 is an inclined plate extending from the upper left to the lower right, the upper end and the front end and the rear end of the third blocking plate 15 are connected with the middle frame 2, and the third blocking plate 15 is used for blocking and guiding falling tailings by the first blocking plate 13 and tailings transported by the upper layer of the secondary magnetic separation main conveyor 6, so that the tailings at the position fall;
a fourth blocking plate 16 is arranged on the right side of the second blocking plate 14, the height of the fourth blocking plate 16 is consistent with the overall height of the primary auxiliary conveyor 5 and the secondary magnetic separation main conveyor 6, the fourth blocking plate 16 is an inclined plate extending from the upper left to the lower right, the upper end of the fourth blocking plate 16 is connected with the upper end of the second blocking plate 14, and the fourth blocking plate 16 is used for guiding the concentrate transported by the lower layer of the primary magnetic separation main conveyor 4 to fall;
a fifth blocking plate 17 is arranged below the third blocking plate 15, the fifth blocking plate 17 is an inclined plate extending from the upper right to the lower left, the fifth blocking plate 17 is positioned at the left side of the secondary auxiliary conveyor 7, a sixth blocking plate 18 is arranged below the fifth blocking plate 17, the sixth blocking plate 18 is an inclined plate extending from the upper left to the lower right, the front end and the rear end of the fifth blocking plate 17 and the sixth blocking plate 18 are respectively connected to the lower frame 3, the lower end of the sixth blocking plate 18 is connected with the first tailing discharging outlet 11, the fifth blocking plate 17 is used for providing guidance for the tailings falling on the third blocking plate 15, the sixth blocking plate 18 is used for providing guidance for the tailings falling on the fifth blocking plate 17, and the sixth blocking plate 18 and a vertical first vertical plate 19 on the right side of the sixth blocking plate 18 guide the tailings between the sixth blocking plate and the first vertical plate to the first tailing discharging outlet 11;
a seventh blocking plate 20 obliquely arranged at the left lower part is arranged below the fourth blocking plate 16, an eighth blocking plate 21 obliquely arranged at the right lower part of the seventh blocking plate 20, the fourth blocking plate 16, the seventh blocking plate 20 and the eighth blocking plate 21 form an 'entering' shape structure, the front end and the rear end of the seventh blocking plate 20 and the eighth blocking plate 21 are connected with the lower frame 3, the heights of the seventh blocking plate 20 and the eighth blocking plate 21 are consistent with the height of the lower frame 3, the inclination of the eighth blocking plate 21 is consistent with the inclination of the fourth blocking plate 16, the eighth blocking plate 21 is used for providing guiding of concentrate falling on the fourth blocking plate 16, and a ninth blocking plate 22 obliquely arranged at the right side of the eighth blocking plate 21 and the ninth blocking plate 22 obliquely arranged at the left lower part of the eighth blocking plate guides concentrate between the eighth blocking plate 21 to the concentrate discharge port 9;
a second vertical plate 25 is arranged on the left side of the scavenging roller 8, a tenth blocking plate 23 obliquely arranged on the left lower side and an eleventh blocking plate 24 obliquely arranged on the right lower side are arranged below the scavenging roller 8, the tenth blocking plate 23 and the eleventh blocking plate 24 are symmetrically arranged on the left and right, the second vertical plate 25 and the tenth blocking plate 23 are used for guiding tailings at the second place to the second tailings discharge port 12, and the eleventh blocking plate 24 and the seventh blocking plate 20 are used for guiding middlings on the scavenging roller 8 to the middling discharge port 10.
The working method of the multistage dry magnetic separator comprises the following steps:
firstly, magnetic iron ore with the granularity of 0-8 mm enters the right section of a first-stage conveying belt 4.4 at the upper layer of a first-stage magnetic separation main conveyor 4 through an ore feeding hole, the ore moves leftwards under the drive of the first-stage conveying belt 4.4, and moves in a rolling way under the action of magnetic force (magnets are arranged in a staggered manner according to NS poles) when passing through a magnetic field area, the ore with high iron content clings to the surface of the first-stage conveying belt 4.4, the ore with low iron content is positioned on a middle material layer, and the waste stone (tailings) is positioned on the upper surface;
step two, when the ore passes through the first-stage magnetic separation left roller 4.2, the waste rock is separated from the material layer and falls into the first tailing discharge port 11, the iron-containing ore is clung to the first-stage conveying belt 4.4 to continuously move forwards under the action of magnetic force, and enters between the first-stage magnetic separation main conveyor 4 and the first-stage auxiliary conveyor 5, the ore moves forwards in a jumping mode along the running direction under the action of gravity and the magnetic force on the inner side of the lower-layer first-stage conveying belt 4.4, and enters the concentrate discharge port 9 when entering the sixth seventh eighth magnetic area of the right section, the iron-containing ore is weakened due to magnetism;
step three, the ore with lower iron content enters the upper layer of the secondary magnetic separation main conveyor 6 on the secondary conveyor belt 6.4 of the upper layer of the secondary magnetic separation main conveyor 6 under the conveying of the primary auxiliary conveyor belt 5.4 of the primary auxiliary conveyor 5, and the ore enters the middling discharge port 10 as the ore with lower iron content enters the secondary circulation as the same mineral separation process of the step one and the step two because the principle of the secondary magnetic separation main conveyor 6 is the same as that of the primary magnetic separation main conveyor 4 (the magnetic field intensity of the secondary magnetic separation main conveyor 6 is different from that of the primary magnetic separation main conveyor 4), the principle of the secondary auxiliary conveyor 7 is the same as that of the primary auxiliary conveyor 5;
and fourthly, conveying the ore with extremely low iron content into the outer surface of the scavenging roller 8 by the secondary auxiliary conveyor 7, conveying the ore with the iron content into the middling discharge port 10 under the action of magnetic force, and conveying the waste stone without iron into the second tailing discharge port 12, so that the lowest iron content (less than or equal to 1.00%) at the second tailing discharge port 12 can be ensured.
Three sets of embodiments are supplemented here:
example 1:
after the boundary ore produced in the mining process of certain iron ore in the Mashan is crushed and preselected by a movable dry separation station, the granularity is less than 60 mm, the subsequent concentration is high in cost, even the loss is high, and the utilization value is low. If a multi-stage dry magnetic separator and a high-pressure roller mill are adopted for crushing to the granularity of less than 8 mm, the pre-selection effect is very obvious:
category(s) Yield% Total iron grade TFe% Magnet grade MFe% Recovery%
Raw ore 100 18.54 14.58 100
Concentrate 56.00 29.45 22.94 88.11
Middling ore 23.50 10.67 6.89 11.10
Tailings 19.50 7.63 0.60 0.80
The magnetic field intensity of the upper layer of the primary magnetic separation main conveyor 4 is 3000 gauss, the magnetic field intensity of the lower layer is 4500 gauss, the magnetic field intensity of the upper layer of the secondary magnetic separation main conveyor 6 is 3000 gauss, the magnetic field intensity of the lower layer is 4700 gauss, the speed of the primary conveyor belt 4.4 is 100-167m/min, the speed of the secondary conveyor belt 6.4 is 100-167m/min, the speed of the primary auxiliary conveyor belt 5.4 is 100-170m/min, the speed of the secondary auxiliary conveyor belt 7.4 is 100-170m/min, the magnetic field intensity of the primary magnetic separation left roller is 5000 gauss, the magnetic field intensity of the secondary magnetic separation left roller is 5000 gauss, and the magnetic field intensity of the sweeping roller is 5000 gauss.
Example 2:
the parameters of the waste rock after dry separation and tailing discarding of certain iron ore in the Mashan are as follows after the waste rock is crushed to the granularity of less than 8 mm and preselected by a multi-stage dry magnetic separator:
category(s) Yield% Total iron grade TFe% Magnet grade MFe% Recovery%
Raw ore 100 9.71 3.68 100
Concentrate 13.19 24.12 18.59 66.70
Middling ore 20.10 14.68 3.34 18.25
Tailings 66.70 5.36 0.83 15.00
The magnetic field intensity of the upper layer of the primary magnetic separation main conveyor 4 is 3000 gauss, the magnetic field intensity of the lower layer is 4700 gauss, the magnetic field intensity of the upper layer of the secondary magnetic separation main conveyor 6 is 3000 gauss, the magnetic field intensity of the lower layer is 4800 gauss, the speed of the primary conveyor belt 4.4 is 100-167m/min, the speed of the secondary conveyor belt 6.4 is 100-167m/min, the speed of the primary auxiliary conveyor belt 5.4 is 100-170m/min, the speed of the secondary auxiliary conveyor belt 7.4 is 100-170m/min, the magnetic field intensity of the primary magnetic separation left roller is 5000 gauss, the magnetic field intensity of the secondary magnetic separation left roller is 5000 gauss, and the magnetic field intensity of the sweeping roller is 5000 gauss.
Example 3:
in Shanxi dynasty county, certain iron ore has higher grade, and in order to obtain higher economic and technical indexes, the ore is crushed by a high-pressure roller mill until the granularity is less than 20 mm, and the effect is obvious after the ore is preselected by a multi-stage dry magnetic separator, and the parameters are as follows:
category(s) Yield% Total iron grade TFe% Magnet grade MFe% Recovery%
Raw ore 100 24.20 21.66 100
Concentrate 56.30 83.43 83.43
Middling ore 25 0.60 0.69
Tailings 18.70 15.40 13.29
The upper magnetic field strength of the primary magnetic separation main conveyor 4 is 3000 gauss, the lower magnetic field strength is 4000 gauss, the upper magnetic field strength of the secondary magnetic separation main conveyor 6 is 3000 gauss, the lower magnetic field strength is 4500 gauss, the speed of the primary conveyor belt 4.4 is 100-167m/min, the speed of the secondary conveyor belt 6.4 is 100-167m/min, the speed of the primary auxiliary conveyor belt 5.4 is 100-170m/min, the speed of the secondary auxiliary conveyor belt 7.4 is 100-170m/min, the magnetic field strength of the primary magnetic separation left roller is 5000 gauss, the magnetic field strength of the secondary magnetic separation left roller is 5000 gauss, and the magnetic field strength of the sweeping roller is 5000 gauss.
The foregoing is merely a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All technical schemes formed by equivalent transformation or equivalent substitution fall within the protection scope of the invention.

Claims (1)

1. The multistage dry magnetic separator is characterized by comprising four layers of conveying mechanisms which are sequentially arranged from top to bottom, wherein each four layers of conveying mechanisms sequentially comprise a first-layer primary magnetic separation main conveyor (4), a second-layer primary auxiliary conveyor (5), a third-layer secondary magnetic separation main conveyor (6) and a fourth-layer secondary auxiliary conveyor (7) from top to bottom;
an ore feed inlet for ore feed to be beneficiated of the multi-stage dry magnetic separator is positioned right above the right section of the primary magnetic separation main conveyor (4), and the right section of the corresponding upper frame (1) is provided with an ore feed inlet;
a multistage dry magnetic separator can separate out concentrate with higher iron content, middling with medium iron content and tailings with lower iron content,
wherein the concentrate is selected from the right section at the bottom of the multi-stage dry magnetic separator, a concentrate discharge port (9) is arranged at the right section of the corresponding lower frame (3),
wherein middlings are selected from the middle section at the bottom of the multi-stage dry magnetic separator, and a middling discharging port (10) is formed in the middle section of the corresponding lower frame (3);
the primary magnetic separation main conveyor (4) comprises a transverse primary magnetic separation main frame (4.1), a primary magnetic separation left roller (4.2) and a primary magnetic separation right roller (4.3) are respectively arranged at the left end and the right end of the primary magnetic separation main frame (4.1), the primary magnetic separation left roller (4.2) is a magnetic roller, the primary magnetic separation right roller (4.3) is a non-magnetic roller, a primary conveyor belt (4.4) is sleeved between the primary magnetic separation left roller (4.2) and the primary magnetic separation right roller (4.3), a plurality of groups of primary magnets (4.5) are respectively arranged at the middle part of the primary magnetic separation main frame (4.1) from left to right upwards and downwards, the groups of primary magnets (4.5) are arranged at left and right intervals, the upward primary magnets (4.5) are of U-shaped structures, the upward primary magnets (4.5) are of inverted U-shaped structures, the upward primary magnets (4.5) are uniform in magnetism, the upward primary magnets (4.5) are arranged in a staggered manner, and the magnetism of the downward primary magnets (4.5) is gradually reduced from left to right;
the primary auxiliary conveyor (5) comprises a transverse primary auxiliary conveying frame (5.1), a primary auxiliary conveying left roller (5.2) and a primary auxiliary conveying right roller (5.3) are respectively arranged at the left end and the right end of the primary auxiliary conveying frame (5.1), the primary auxiliary conveying left roller (5.2) and the primary auxiliary conveying right roller (5.3) are both nonmagnetic rollers, a primary auxiliary conveying belt (5.4) is sleeved between the primary auxiliary conveying left roller (5.2) and the primary auxiliary conveying right roller (5.3), the primary auxiliary conveyor (5) is positioned under the left section of the primary magnetic separation main conveyor (4), and the primary auxiliary conveying left roller (5.2) is positioned under the primary magnetic separation left roller (4.2);
the secondary magnetic separation main conveyor (6) has a structure similar to that of the primary magnetic separation main conveyor (4), the secondary magnetic separation main conveyor (6) comprises a transverse secondary magnetic separation main frame (6.1), two groups of secondary magnetic separation left rollers (6.2) and secondary magnetic separation right rollers (6.3) are respectively arranged at the left end and the right end of the secondary magnetic separation main frame (6.1), the secondary magnetic separation left rollers (6.2) are magnetic rollers, the secondary magnetic separation right rollers (6.3) are nonmagnetic rollers, a secondary conveyor belt (6.4) is sleeved between the secondary magnetic separation left rollers (6.2) and the secondary magnetic separation right rollers (6.3), a plurality of groups of secondary magnets (6.5) are respectively arranged upwards and downwards from left to right in the middle of the secondary magnetic separation main frame (6.1), the upward secondary magnets (6.5) are of U-shaped structures, the downward secondary magnets (6.5) are of inverted U-shaped structures, and the upward secondary magnets (6.5) are uniformly arranged from left to right, and the upward magnetic properties of the secondary magnets (6.5) are gradually reduced from the left to right;
the secondary auxiliary conveyor (7) comprises a transverse secondary auxiliary conveying rack (7.1), a secondary auxiliary conveying left roller (7.2) and a secondary auxiliary conveying right roller (7.3) are respectively arranged at the left end and the right end of the secondary auxiliary conveying rack (7.1), the secondary auxiliary conveying left roller (7.2) and the secondary auxiliary conveying right roller (7.3) are both nonmagnetic rollers, a secondary auxiliary conveying belt (7.4) is sleeved between the secondary auxiliary conveying left roller (7.2) and the secondary auxiliary conveying right roller (7.3), the secondary auxiliary conveyor (7) is positioned right below the left middle section of the secondary magnetic separation main conveyor (6), and the secondary auxiliary conveying left roller (7.2) is positioned right below the secondary magnetic separation left roller;
a scavenging roller (8) is arranged on the right side of the secondary auxiliary conveyor (7), the scavenging roller (8) is a magnetic roller, and the top height of the scavenging roller (8) is lower than the top height of the secondary auxiliary conveyor (7);
the tailings are selected from two parts at the bottom of the multi-stage dry magnetic separator, wherein the first tailings are selected from the left bottom section of the multi-stage dry magnetic separator, a first tailings discharge port (11) is formed in the left section of the corresponding lower frame (3), the second tailings are selected from the middle bottom section of the multi-stage dry magnetic separator, a second tailings discharge port (12) is formed in the middle section of the corresponding lower frame (3), the second tailings discharge port (12) is positioned at the left side of the middling discharge port (10), and the second tailings discharge port (12) and the middling discharge port (10) are respectively positioned at the left side and the right side of the scavenging roller (8);
a first blocking plate (13) with the same height as the first blocking plate is arranged at the left side of the primary magnetic separation main conveyor (4), the first blocking plate (13) is an inclined plate extending from the upper left to the lower right, and the upper end and the front end and the rear end of the first blocking plate (13) are connected with an upper frame (1);
the right side of the primary auxiliary conveyor (5) is provided with a second blocking plate (14) with the same height as the first blocking plate, the second blocking plate (14) is positioned below the right section of the primary magnetic separation main conveyor (4), the second blocking plate (14) is an inclined plate extending from the upper right to the lower left, and the front end and the rear end of the second blocking plate (14) are connected with the middle frame (2);
a third blocking plate (15) with the same height as the second-stage magnetic separation main conveyor (6) is arranged at the left side of the second-stage magnetic separation main conveyor, the third blocking plate (15) is an inclined plate extending from the upper left to the lower right, and the upper end and the front end and the rear end of the third blocking plate (15) are connected with the middle frame (2);
a fourth blocking plate (16) is arranged on the right side of the second blocking plate (14), the height of the fourth blocking plate (16) is consistent with the overall height of the primary auxiliary conveyor (5) and the secondary magnetic separation main conveyor (6), the fourth blocking plate (16) is an inclined plate extending from the upper left to the lower right, and the upper end of the fourth blocking plate (16) is connected with the upper end of the second blocking plate (14);
a fifth blocking plate (17) is arranged below the third blocking plate (15), the fifth blocking plate (17) is an inclined plate extending from the upper right to the lower left, the fifth blocking plate (17) is positioned at the left of the secondary auxiliary conveyor (7), a sixth blocking plate (18) is arranged below the fifth blocking plate (17), the sixth blocking plate (18) is an inclined plate extending from the upper left to the lower right, the front end and the rear end of the fifth blocking plate (17) and the front end and the rear end of the sixth blocking plate (18) are respectively connected to the lower frame (3), the lower end of the sixth blocking plate (18) is connected with the first tailing discharge port (11), and a vertical first vertical plate (19) arranged at the right of the sixth blocking plate (18) guides tailings between the fifth blocking plate and the sixth blocking plate to the first tailing discharge port (11);
a seventh baffle plate (20) obliquely arranged at the left lower part is arranged below the fourth baffle plate (16), an eighth baffle plate (21) obliquely arranged at the right lower part of the seventh baffle plate (20), the fourth baffle plate (16), the seventh baffle plate (20) and the eighth baffle plate (21) form a 'entering' structure, the front end and the rear end of the seventh baffle plate (20) and the rear end of the eighth baffle plate (21) are connected with the lower frame (3), the heights of the seventh baffle plate (20) and the eighth baffle plate (21) are consistent with the height of the lower frame (3), the inclination of the eighth baffle plate (21) is consistent with the inclination of the fourth baffle plate (16), and a ninth baffle plate (22) obliquely arranged at the right of the eighth baffle plate (21) and the ninth baffle plate obliquely arranged at the left lower part leads concentrate between the eighth baffle plate (21) and the eighth baffle plate to the concentrate discharge port (9);
a second vertical plate (25) is arranged at the left side of the scavenging roller (8), a tenth blocking plate (23) obliquely arranged at the left lower side and an eleventh blocking plate (24) obliquely arranged at the right lower side are arranged below the scavenging roller (8), and the tenth blocking plate (23) and the eleventh blocking plate (24) are symmetrically arranged at the left and right sides;
a plurality of groups of first-stage conveying belt supporting blocks (4.6) are respectively arranged upwards and downwards from left to right in the middle of the first-stage magnetic separation main frame (4.1), the plurality of groups of first-stage conveying belt supporting blocks (4.6) are arranged at left and right intervals, the plurality of groups of first-stage conveying belt supporting blocks (4.6) are respectively positioned in gaps of adjacent first-stage magnets (4.5), the top end of each first-stage conveying belt supporting block (4.6) is higher than the height of each first-stage magnet (4.5), the top end of each first-stage conveying belt supporting block (4.6) is in contact with the inner side surface of the corresponding first-stage conveying belt (4.4), the bottom end of each first-stage conveying belt supporting block (4.6) is lower than the height of each first-stage magnet (4.5), and the bottom end of each first-stage conveying belt supporting block (4.6) is in contact with the inner side surface of the corresponding first-stage conveying belt (4.4);
a plurality of groups of secondary conveyor belt supporting blocks (6.6) are respectively arranged upwards and downwards from left to right in the middle of the secondary magnetic separation main frame (6.1), the groups of secondary conveyor belt supporting blocks (6.6) are arranged at intervals left and right, the groups of secondary conveyor belt supporting blocks (6.6) are respectively positioned in gaps of adjacent secondary magnets (6.5), the top end of each secondary conveyor belt supporting block (6.6) is higher than the height of each secondary magnet (6.5), the top end of each secondary conveyor belt supporting block (6.6) is in contact with the inner side surface of an upper secondary conveyor belt (6.4), the bottom end of each secondary conveyor belt supporting block (6.6) is lower than the height of each secondary magnet (6.5), and the bottom end of each secondary conveyor belt supporting block (6.6) is in contact with the inner side surface of a lower secondary conveyor belt (6.4), and the secondary conveyor belt supporting blocks (6.6) are wear-resistant ceramics;
the primary magnet (4.5) is an electro-permanent magnet,
the secondary magnet (6.5) is an electro-permanent magnet;
the top of the scavenging roller (8) is positioned at the center line height of a secondary auxiliary conveying frame (7.1) of the secondary auxiliary conveyor (7);
the secondary magnetic separation main conveyor (6) is located under the primary auxiliary conveyor (5), the length of the secondary magnetic separation main conveyor (6) is longer than that of the primary auxiliary conveyor (5), the left end of the secondary magnetic separation main conveyor (6) slightly exceeds the left end of the primary magnetic separation main conveyor (4), the magnetism of a secondary magnet (6.5) of the secondary magnetic separation main conveyor (6) is stronger than that of a primary magnet (4.5) of the primary magnetic separation main conveyor (4), and the number of the secondary magnets (6.5) of the secondary magnetic separation main conveyor (6) is smaller than that of the primary magnets (4.5) of the primary magnetic separation main conveyor (4).
CN201810633618.XA 2018-06-20 2018-06-20 Multistage dry-type magnet separator Active CN108787161B (en)

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CN109847932B (en) * 2019-02-21 2024-02-06 中冶北方(大连)工程技术有限公司 Magnetic mineral separation ore unloading system of magnetite ore storage bin

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