CN104858052B - High-gradient permanent magnetic vertical plate magnetic separator - Google Patents
High-gradient permanent magnetic vertical plate magnetic separator Download PDFInfo
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- CN104858052B CN104858052B CN201510280773.4A CN201510280773A CN104858052B CN 104858052 B CN104858052 B CN 104858052B CN 201510280773 A CN201510280773 A CN 201510280773A CN 104858052 B CN104858052 B CN 104858052B
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Abstract
The invention discloses a kind of high-gradient permanent magnetic vertical plate magnetic separator, the high gradient disk set set including the rotation driven by the first power set above cell body, high gradient disk set includes disk spindle and is installed on several spaced disk cells on disk spindle；The brush roll device for discharging that the rotation driven by the second power set above high gradient disk set is set, brush roll device for discharging includes discharging main shaft and is installed on several spaced brush roll discharge units on discharging main shaft；The top of each disk cell is located between two adjacent brush roll discharge units.The present invention extrudes to form the high-gradient magnetic field being enriched on magnetic-collecting board with less magnetic patch, is that ore dressing or removal of impurities provide high magnetic field intensity；Brush roll device for discharging can clean the mineral on disk cell completely, and discharging thoroughly, will not cause scraping damage to disk cell, and complete machine structure is simple, and equipment cost and production cost are low.
Description
Technical field
The present invention relates to the preparation equipment that weak magnetic mineral is separated in metal or nonmetallic ore, and in particular to a kind of high gradient
Permanent magnetism vertical plate magnetic separator.
Background technology
Removed for ore dressing and quartz sand, mica, feldspar ore etc. in the weakly magnetic minerals such as picture bloodstone, manganese ore and contain weak magnetic
For impurity, mainly sorted at this stage using high gradient electromagnetism vertical-ring magnetic separator and permanent-magnet vertical-ring high-gradient magnetic separator.
The magnetic field magnetization magnetic conductive media that high gradient electromagnetism vertical-ring magnetic separator is produced using magnet coil, is existed using the magnetic conductive media being magnetized
Sorted in the middle of ore pulp, and separation index is improved added with palsating equipment in sorting area.Permanent-magnet vertical-ring high-gradient magnetic separator with
The operating principle of high gradient electromagnetism vertical-ring magnetic separator is identical, simply changes in the mode for producing magnetic source, and permanent magnet vertical ring is high
The magnetic source of gradient magnetic separator is produced with permanent magnet, sorts process essentially identical.
High gradient electromagnetism vertical-ring magnetic separator produces magnetic field by the way of magnet coil is excitatory, power consumption pole during this
Greatly, magnet coil needs cooling, and complicated, production cost and maintenance cost are high.
Permanent-magnet vertical-ring high-gradient magnetic separator is, as magnetic source generation magnetic field, to want to produce high gradient forever using permanent-magnet material
Magnetic magnetic field, the permanent-magnet material used is expensive, and needs permeability magnetic material to be magnetized, complicated integral structure, operates numerous
Miscellaneous, cost is high.
At present, although occur in that disc type magnetic separator, Application No. 201020659725.9, the name of such as applicant's early stage
The referred to as patent application of disc type mine tailing magnetic separator, but the magnetic field intensity of the magnetic separator is relatively low, in 1800-4000 gauss ranges,
Be not suitable for the requirement of ore dressing or removal of impurities to high-gradient magnetic field；In addition, the magnetic separator unloads ore deposit using scraper plate, exist unload ore deposit it is unclean,
The problem of easy damaged magnetic separation panel surface.
The content of the invention
The technical problems to be solved by the invention are：There is provided a kind of high-gradient permanent magnetic vertical plate magnetic separator, it is possible to provide high gradient
Magnetic field, meets and reclaims the demand removed with weak magnetic impurity to weak magnetic mineral.
In order to solve the above technical problems, the technical scheme is that：High-gradient permanent magnetic vertical plate magnetic separator, including frame,
The frame is provided with cell body, in addition to
High-gradient Magnetic disc assembly, above the cell body, the High-gradient Magnetic disc assembly is included by the first power set
The high gradient disk set that the rotation of driving is set, the high gradient disk set includes disk spindle and is installed on the disk
Spaced N number of disk cell on main shaft, wherein, N≤1；
Brush roll discharging assembly, above the High-gradient Magnetic disc assembly, the brush roll discharging assembly includes being moved by second
The brush roll device for discharging that the rotation of power apparatus driving is set, the brush roll device for discharging includes discharging main shaft and is installed on described unload
Expect spaced M brush roll discharge unit on main shaft, wherein, M=N+1；
The top of each disk cell is located between brush roll discharge unit described in adjacent two.
As an improvement, each disk cell includes disk body and annular array in some magnetic on the disk body
Group；Each magnetic group includes some magnetic patch fitted together, and defining some magnetic patch has X rows Y row, wherein, X≤2, Y
≤ 1, the like pole of the magnetic patch of adjacent rows is oppositely arranged, and poly- magnetic is provided between the magnetic patch of adjacent rows
Plate.
Wherein, the magnetic group position on the adjacent disk cell is corresponding, the corresponding magnetic-collecting board in position
Opposite pole be oppositely arranged.
Wherein, the disk body is modular construction, and the disk body of modular construction includes being installed on the disk spindle
Hub body and the magnetic group mounting disc with the removable ring-type being fixedly connected of the hub body, described some magnetic group annular arrays are in described
In magnetic group mounting disc.
Further, circular array shows the magnetic group peace corresponding with described some magnetic group quantity in the magnetic group mounting disc
Hole is filled, each magnetic group is embedded described in corresponding one in magnetic group mounting hole.
Improved as another, each brush roll discharge unit is included along the circumferentially fixed setting of the discharging main shaft
More than one discharge component；Each discharge component includes：Spring base, the spring base is vertical simultaneously with the discharging main shaft
It is fixed on the discharging main shaft；Spring, the first end of the spring is set on the spring base and is secured to connection；Brush
Roller, the roll shaft end of the brush roll is fixedly connected with the second end of the spring.
Wherein, the roll shaft end of the brush roll by attachment means with the second end of the spring is removable is fixedly connected；Institute
Stating attachment means includes branch sleeve, and the second end of the spring is sheathed on outer wall and the company of being secured to of the branch sleeve
Connect, the inwall of the branch sleeve is provided with internal thread；The surface at the roll shaft end of the brush roll is provided with external screw thread, the brush roll
Roll shaft end is threadedly coupled with the branch sleeve.
Improved as another, the both sides of the cell body are respectively equipped with going out on ore pulp jet water spout, the ore pulp jet water spout
Water hole is towards the bottom in the cell body.
Improved as another, be additionally provided with protective cover and mining collecting trough in the frame, the mining collecting trough is arranged on the groove
The side of body, positioned at the lower section of the protective cover.
Improved as another, the top of the frame is provided with unloading ore deposit jet water spout, for will be by the brush roll discharging assembly
Unload to the magnetic mineral on the protective cover inwall and rush to the mining collecting trough.
By adopting the above-described technical solution, the high-gradient permanent magnetic vertical plate magnetic separator of the present invention is terraced provided with height above cell body
Spend and brush roll discharging assembly is provided with above disk assembly, High-gradient Magnetic disc assembly, utilize the high-gradient permanent magnetic vertical plate magnetic separation of the present invention
When machine ore dressing or removal of impurities, ore pulp is flushed on disk cell and fallen into cell body into cell body through material feeding box, and the first power set drive
Dynamic high gradient disk set rotation, ore pulp is contacted with disk cell, and weak magnetic mineral is attracted on disk cell and with disk
Unit is rotated up, and when weak magnetic mineral, which departs from ore pulp, goes to top with disk cell, the brush roll rotated at a high speed unloads material list
Under member is brushed by force, the separation of weak magnetic mineral and ore pulp is realized.
Because each disk cell includes disk body and annular array in some magnetic groups on disk body；Each magnetic group includes assembling
Some magnetic patch of X rows Y row together, the like pole of the magnetic patch of adjacent rows is oppositely arranged, and adjacent rows magnetic patch it
Between be provided with magnetic-collecting board.Adopt the structure, the magnetic patch of adjacent rows is extruded the High-gradient Magnetic to be formed and be enriched on magnetic-collecting board
, magnetic field intensity is enhanced, meets and the demand removed with weak magnetic impurity is reclaimed to weak magnetic mineral, separation weak magnetic is improved
The effect of mineral.
Because the magnetic group position on adjacent disk cell is corresponding, the opposite pole of the corresponding magnetic-collecting board in position is relative
Set.Make the magnetic-collecting board formation flux loop structure in adjacent magnetic group, the magnetic line of force distance of formation is most short, it is to avoid because of the magnetic line of force
Disperse and form magnetic force waste.
Because brush roll discharge unit includes more than one discharge component, each discharge component includes brush roll, and brush roll passes through
Spring is flexible coupling with discharging main shaft elasticity；The brush roll of rotation is compressed between squeezing into adjacent disk cell by force at a high speed, by disk
Mineral on unit are brushed down by force, when brush roll departs from disk cell reset, mineral are ejected, reclaimed.Ore deposit mode phase is unloaded with scraper plate
Than the discharge component of this structure is easy to thoroughly clean the mineral on disk cell, and discharging is thorough, and brush roll will not be to disk cell
Cause scraping damage.The roll shaft end of brush roll with the second end of spring is removable is fixedly connected, be easy to more renew after brush roll weares and teares
Brush roll.
In summary, high-gradient permanent magnetic vertical plate magnetic separator of the invention can be being realized to weak magnetic mineral recovery and weak magnetic
Property impurity remove while, solve the problems, such as prior art using electromagnetism vertical-ring magnetic separator highly energy-consuming and permanent magnet vertical ring magnetic separator
The high problem of cost, and simple in construction, equipment cost and production cost are low.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation (eliminating protective cover) of the embodiment of the present invention；
Fig. 2 is Fig. 1 left view schematic diagram (eliminating power set)；
Fig. 3 is high gradient disk apparatus structure schematic diagram in Fig. 1；
Fig. 4 is disk cell structural representation in Fig. 3；
Fig. 5 is A-A schematic cross-sectional views (eliminating magnetic group) in Fig. 4；
Fig. 6 is the schematic cross-sectional view of two neighboring disk cell in Fig. 3；
Fig. 7 is the enlarged diagram of a magnetic group in Fig. 4；
Fig. 8 is the structure schematic cross-sectional view of a row magnetic patch in Fig. 7；
Fig. 9 is the corresponding magnetic-collecting board opposite pole formation flux loop structural representation in position in Fig. 6；
Figure 10 is brush roll device for discharging structural representation in Fig. 1；
Figure 11 is Figure 10 brush roll discharge unit left view schematic diagram；
Figure 12 is the schematic cross-sectional view of a discharge component in Figure 11；
In figure：1- frames；The power set of 2- first；3- high gradient disk sets；31- disk spindles；32- disk cells；
321- disk bodies；3211- hub bodies；3212- connecting plates；3213- magnetic group mounting discs；3214- magnetic group mounting holes；322- magnetic groups；3221-
Magnetic patch；3222- magnetic-collecting boards；3223- pressure strips；The power set of 4- second；5- brush roll devices for discharging；51- discharging main shafts；52- is brushed
Roller discharge unit；521- spring bases；522- springs；523- branch sleeves；524- brush rolls；5241- roll shafts；525- back tightening nuts；
6- material feeding box；7- protective covers；8- cell bodies；9- unloads ore deposit jet water spout；10- mining collecting troughs；11- ore pulp jet water spouts；12- tailing tanks.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As depicted in figs. 1 and 2, the high-gradient permanent magnetic vertical plate magnetic separator of the embodiment of the present invention includes：Frame 1, in frame 1
Provided with cell body 8, cell body 8 is made of stainless steel, the curved structure in its cross section；Material feeding box 6 is provided with the side of cell body 8,
The top of cell body 8 is provided with High-gradient Magnetic disc assembly, and brush roll discharging assembly is provided with the top of High-gradient Magnetic disc assembly.
As shown in figure 3, wherein, High-gradient Magnetic disc assembly includes being rotatably arranged on frame 1 by what the first power set 2 drove
On high gradient disk set 3, the high gradient disk set 3 includes disk spindle 31 and being spaced on disk spindle 31 and sets
The N number of disk cell 32 put, wherein, N≤1.
As shown in Figure 10, wherein, brush roll discharging assembly include be rotatably arranged on frame 1 by what the second power set 4 drove
On brush roll device for discharging 5, the brush roll device for discharging 5 include discharging main shaft 51 and on discharging main shaft 51 it is spaced
M brush roll discharge unit 52, wherein, M=N+1, the quantity of brush roll discharge unit 52 than disk cell 32 quantity more than one, make
The top of each disk cell 32 is folded between two adjacent brush roll discharge units 52, so as to by all disk lists
The weak magnetic mineral on first 32 surfaces brushes.
In Fig. 1 and Fig. 3, N=4 situation is illustrated；In Fig. 1 and Figure 10, M=5 situation is illustrated.According to reality
The need for production, those skilled in the art can increase and decrease the quantity of disk cell 32, brush roll discharge unit 52, herein not
It is construed as limiting.
As shown in figure 1, the first power set 2 and the second power set 4, which all employ conventional motor, is equipped with decelerator
Form, respectively by shaft coupling, be each connected with high gradient disk set 3, brush roll device for discharging 5.
As shown in figure 4, wherein, if each disk cell 32 includes disk body 321 and annular array on the disk body 321
The situation of eight magnetic groups 322 is illustrated in dry magnetic group 322, figure, its quantity is not limited at this.As shown in Figure 7 and Figure 8,
Each magnetic group 322 includes some magnetic patch 3221 fitted together, and defining some magnetic patch has X rows Y row, wherein, X≤2,
The situation that 4 rows 3 arrange totally 12 pieces of magnetic patch is illustrated in Y≤1, figure, accompanying drawing is only illustrative, its quantity do not limited herein
It is fixed；The like pole of the magnetic patch of adjacent rows is oppositely arranged, and is provided with magnetic-collecting board between the magnetic patch of adjacent rows
3222。
Such a structure, can form the high-gradient magnetic field being enriched on magnetic-collecting board 3222 with the less extruding of magnetic patch 3221, increase
Strong magnetic field intensity, up to 15000-18000 Gausses, meets and weak magnetic mineral is reclaimed and demand that weak magnetic impurity is removed,
Improve the effect of separation weak magnetic mineral.
As shown in Fig. 6 and Fig. 9, wherein, the position of magnetic group 322 on adjacent disk cell 32 is corresponding, and position is corresponding
The opposite pole of the magnetic-collecting board 3222 be oppositely arranged.Make the formation flux loop knot of magnetic-collecting board 3222 in adjacent magnetic group
Structure, the magnetic line of force distance of formation is most short, it is to avoid form magnetic force waste because the magnetic line of force is scattered.
As shown in figure 5, wherein, disk body 321 uses modular construction, including the He of hub body 3211 being installed on disk spindle 31
The magnetic group mounting disc 3213 for the ring-type being fixedly connected with hub body 3211 by connecting plate 3212 and bolt, nut, is installed in magnetic group
Circular array shows the magnetic group mounting hole 3214 corresponding with the quantity of magnetic group 322 on disk 3213, and each magnetic group 322 is embedded right
Described in one answered in magnetic group mounting hole 3214.Disk body 321 uses modular construction, and magnetic group 322 is embedded in magnetic group mounting disc 3213
In magnetic group mounting hole 3214, it is not only convenient for installing, and effective ore dressing region is more concentrated, when ore dressing or removal of impurities, is only embedded
The bottom of magnetic group mounting disc 3213 for having magnetic group 322 is immersed in ore pulp, beneficial to effective ore dressing.
As shown in Figure 10, wherein, each brush roll discharge unit 52 include along discharging main shaft 51 circumferentially fixed setting one
The situation of 4 discharge components is illustrated in discharge component more than individual, Figure 11, accompanying drawing is only illustrative, herein not to it
Quantity is construed as limiting；Each discharge component includes：Spring base 521, the spring base 521 is vertical with discharging main shaft 51 and is fixedly welded on
On discharging main shaft 51；Spring 522, the first end of the spring 522 is set on spring base 521 and is welded and fixed with it；Brush roll
524, one end of the roll shaft 5241 of the brush roll 524 is fixedly connected with the second end of spring 522, wherein, the diameter of brush roll 524 is more than
Equal to the distance between two adjacent disk cells 32, it is ensured that thorough discharging.
As shown in figure 12, for the ease of the brush roll more renewed after the abrasion of brush roll 524, the one of the roll shaft 5241 of brush roll 524
End by attachment means with the second end of spring 522 is removable is fixedly connected；Wherein, the attachment means include a branch sleeve
523, the second end of spring 522 is sheathed on the outer wall of branch sleeve 523 and is welded and fixed with it, in the inwall of branch sleeve 523
Be provided with internal thread, the end surface of the roll shaft 5241 of brush roll 524 is provided with external screw thread, one end of the roll shaft 5241 of brush roll 524 with
Branch sleeve 523 is threadedly coupled, and back tightening nut 525 is also bolted with roll shaft 5241, to prevent threaded connection roll shaft 5241 with
Branch sleeve 523 loosens.
As shown in Fig. 2 wherein, going out on ore pulp jet water spout 11, ore pulp jet water spout 11 is further respectively had in the both sides of cell body 8
Water hole is towards the bottom in cell body 8, the bottom for being easy to current directly to be washed away in cell body 8 from the both sides of cell body 8, ore pulp is presented not
Regular flow, prevents precipitation.Protective cover 7 and mining collecting trough 10 are additionally provided with frame 1, wherein, mining collecting trough 10 is arranged on and fed
The opposite side of the relative cell body 8 of case 6, and positioned at the lower section of protective cover 7；On the top of frame 1 provided with ore deposit jet water spout 9 is unloaded, it is used for
Rushed being unloaded by brush roll discharging assembly to the magnetic mineral on the inwall of protective cover 7 to mining collecting trough 10.
Using the high-gradient permanent magnetic vertical plate magnetic separator of the present invention, ore dressing or right is carried out to weakly magnetic minerals such as bloodstone, manganese ores
When quartz sand, mica, feldspar ore etc. carry out the removal of impurities of weak magnetic impurity, the first power set 2 driving high gradient disk set 3 revolves
Turn, the second power set 4 driving brush roll device for discharging 5 rotates, and direction of rotation is as shown by the arrows in Figure 2；Ore pulp passes through material feeding box 6
After uniform distributing, it is flushed on the disk cell 32 of high gradient, and falls into cell body 8, impacts flush of the ore pulp in ore pulp jet water spout 11
The lower constantly rolling upwards of stream effect, is contacted, weak magnetic mineral is attracted on disk cell 32 repeatedly with some disk cells 32,
And rotated up with disk cell 32, when weak magnetic mineral, which departs from ore pulp, goes to top with disk cell 32, rotated at a high speed
Brush roll discharge unit 52 in brush roll 524 brush by force under, clean on the inwall of protective cover 7, then unloaded ore deposit jet water spout 9 rush to
In mining collecting trough 10, the separation of weak magnetic mineral and ore pulp is realized.
The high-gradient permanent magnetic vertical plate magnetic separator of the present invention, its High-gradient Magnetic disc assembly is squeezed with the magnetic patch of less adjacent rows
Swaging, into the high-gradient magnetic field being enriched on magnetic-collecting board, is that ore dressing or removal of impurities provide high magnetic field intensity；Its brush roll discharging assembly
The mineral on disk cell can be thoroughly cleaned, discharging thoroughly, and will not cause scraping damage to disk cell.The height ladder of the present invention
Degree permanent magnetism vertical plate magnetic separator is simple in construction, and equipment cost and production cost are low, weak magnetic mineral is reclaimed and weak that can realize
While magnetic impurity is removed, solve the problems, such as that prior art uses the highly energy-consuming and permanent magnet vertical ring magnetic separation of electromagnetism vertical-ring magnetic separator
The high problem of cost of machine.
Claims (8)
1. high-gradient permanent magnetic vertical plate magnetic separator, including：Frame, the frame is provided with cell body, it is characterised in that also include
High-gradient Magnetic disc assembly, above the cell body, the High-gradient Magnetic disc assembly includes being driven by the first power set
The high gradient disk set that sets of rotation, the high gradient disk set includes disk spindle and is installed on the disk spindle
Upper spaced N number of disk cell, wherein, N≤1；
Brush roll discharging assembly, above the High-gradient Magnetic disc assembly, the brush roll discharging assembly includes being filled by the second power
The brush roll device for discharging that the rotation of driving is set is put, the brush roll device for discharging includes discharging main shaft and is installed on the discharging master
Spaced M brush roll discharge unit on axle, wherein, M=N+1；
The top of each disk cell is located between brush roll discharge unit described in adjacent two；
Each brush roll discharge unit includes the more than one discharge component along the circumferentially fixed setting of the discharging main shaft；
Each discharge component includes
Spring base, the spring base is vertical with the discharging main shaft and is fixed on the discharging main shaft；
Spring, the first end of the spring is set on the spring base and is secured to connection；
Brush roll, the roll shaft end of the brush roll is fixedly connected with the second end of the spring；
The roll shaft end of the brush roll by attachment means with the second end of the spring is removable is fixedly connected；The attachment means
Including branch sleeve, the second end of the spring is sheathed on the outer wall of the branch sleeve and is secured to connection, the connection
The inwall of sleeve is provided with internal thread；The surface at the roll shaft end of the brush roll is provided with external screw thread, the roll shaft end of the brush roll and institute
State branch sleeve threaded connection.
2. high-gradient permanent magnetic vertical plate magnetic separator as claimed in claim 1, it is characterised in that each disk cell includes disk
Body and annular array are in some magnetic groups on the disk body；Each magnetic group includes some magnetic patch fitted together, definition
Some magnetic patch have X rows Y row, wherein, X≤2, Y≤1, the like pole of the magnetic patch of adjacent rows is oppositely arranged, and phase
Magnetic-collecting board is provided between the magnetic patch of adjacent two rows.
3. high-gradient permanent magnetic vertical plate magnetic separator as claimed in claim 2, it is characterised in that on the adjacent disk cell
The magnetic group position is corresponding, and the opposite pole of the corresponding magnetic-collecting board in position is oppositely arranged.
4. high-gradient permanent magnetic vertical plate magnetic separator as claimed in claim 2, it is characterised in that the disk body is modular construction, group
The disk body of part structure include the hub body that is installed on the disk spindle and with the removable ring being fixedly connected of the hub body
The magnetic group mounting disc of shape, described some magnetic group annular arrays are in the magnetic group mounting disc.
5. high-gradient permanent magnetic vertical plate magnetic separator as claimed in claim 4, it is characterised in that circular array in the magnetic group mounting disc
The magnetic group mounting hole corresponding with described some magnetic group quantity is shown, each magnetic group is embedded in magnetic group described in corresponding one
In mounting hole.
6. high-gradient permanent magnetic vertical plate magnetic separator as claimed in claim 1, it is characterised in that the both sides of the cell body are respectively equipped with
Apopore on ore pulp jet water spout, the ore pulp jet water spout is towards the bottom in the cell body.
7. high-gradient permanent magnetic vertical plate magnetic separator as claimed in claim 1, it is characterised in that be additionally provided with protective cover in the frame
And mining collecting trough, the mining collecting trough is arranged on the side of the cell body, positioned at the lower section of the protective cover.
8. high-gradient permanent magnetic vertical plate magnetic separator as claimed in claim 7, it is characterised in that the top of the frame is provided with and unloads ore deposit
Jet water spout, is rushed to the mining collecting trough for will be unloaded by the brush roll discharging assembly to the magnetic mineral on the protective cover inwall.
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| CN201510280773.4A CN104858052B (en) | 2015-05-28 | 2015-05-28 | High-gradient permanent magnetic vertical plate magnetic separator |
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| CN201510280773.4A CN104858052B (en) | 2015-05-28 | 2015-05-28 | High-gradient permanent magnetic vertical plate magnetic separator |
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| CN104858052B true CN104858052B (en) | 2017-08-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106334623B (en) * | 2016-10-09 | 2018-08-21 | 京磁材料科技股份有限公司 | Disc type magnetic mud separator |
| CN109396157B (en) * | 2018-10-22 | 2021-07-27 | 河海大学 | Automatic garbage screening and processing equipment and automatic garbage screening and processing method |
| CN112871402B (en) * | 2021-01-11 | 2023-04-14 | 安化县金华混凝土有限公司 | Concrete crusher for building construction |
| CN113318860B (en) * | 2021-05-12 | 2022-08-02 | 新沂市中大石英科技有限公司 | Dry-type magnet separator magnetic drum discharge apparatus is used in quartz sand production |
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| CN104858052A (en) | 2015-08-26 |
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