CN109290024A - A kind of high-strength wearable, bauxite production raw material grinding device - Google Patents
A kind of high-strength wearable, bauxite production raw material grinding device Download PDFInfo
- Publication number
- CN109290024A CN109290024A CN201811164759.8A CN201811164759A CN109290024A CN 109290024 A CN109290024 A CN 109290024A CN 201811164759 A CN201811164759 A CN 201811164759A CN 109290024 A CN109290024 A CN 109290024A
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- China
- Prior art keywords
- cabinet
- grinding device
- bauxite
- supporting member
- noise reduction
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a kind of high-strength wearable, bauxite production raw material grinding device, grinding device includes: cabinet, is equipped in cabinet and crushes chamber；Feed pipe, the first end of feed pipe and the conveyance conduit of bauxite connect, and the second end of feed pipe passes through the first charging aperture of cabinet and crushes chamber, for conveying bauxite into crushing chamber room；Jet pipe, the first end of jet pipe is connect with feeder, the second end of jet pipe passes through the second charging aperture of cabinet and crushes chamber, the second end of jet pipe is equipped with spray gun ring, spray gun ring is equipped with nozzle assembly, and nozzle assembly is used to spray ultrahigh speed air-flow into crushing chamber room to crush bauxite；Magnetic component, magnetic component are arranged in the discharge port crushing chamber room of cabinet, to adsorb the magnetisable material carried secretly in bauxite；Noise reduction component, noise reduction component are arranged on the outer wall of cabinet.Grinding device of the present invention, which improves, crushes quality, saves grinding time, improves crush efficiency.
Description
Technical field
The present invention relates to crushing technology field more particularly to a kind of high-strength wearables, bauxite production raw material grinding device.
Background technique
Traditional bauxite breaking method is to be ground using ball mill to bauxite.Work that the bauxite of ball mill is levigate
Skill process is as follows, and the main body of ball mill is cylindrical, i.e. rotary barrel, and 1~3 meter of diameter, several meters~more than ten meters of length, interior sky,
It is horizontally placed on bearing shell, when grinding, is filled with bauxite and antifriction metal (AFM) ball (several tons~nearly hundred in cylinder chamber in 50% space
Ton), it drives cylinder work to slowly run through reduction gearbox with external powerful high-voltage motor, is tossed by metal ball and freely falls afterwards
Under pound the friction hit He from each other, realize to the levigate of bauxite.Since the weight of ball mill and metal ball itself is very big,
Therefore required driving motor power is also very big, several hundred to more than 1,000 kilowatts, energy consumption is high, and grinding effect is bad, and efficiency is lower.
Given this, it is desirable to provide the new high-strength wearable of one kind, bauxite production solve above-mentioned ask with raw material grinding device
Topic.
Summary of the invention
The embodiment of the invention provides a kind of high-strength wearables, bauxite production raw material grinding device, crush to improve
The crushing effect of device, and then improve the usage experience of user.
In order to achieve the above objectives, the present invention the following technical schemes are provided:
The present invention provides a kind of high-strength wearables, bauxite production raw material grinding device, and grinding device includes: cabinet,
It is equipped in cabinet and crushes chamber；Feed pipe, the first end of feed pipe and the conveyance conduit of bauxite connect, feed pipe
Second end passes through the first charging aperture of cabinet and crushes chamber, for conveying bauxite into crushing chamber room；Jet pipe,
The first end of jet pipe is connect with feeder, and the second end of jet pipe passes through the second charging aperture of cabinet and crushes chamber
Connection, the second end of jet pipe are equipped with spray gun ring, and spray gun ring is equipped with nozzle assembly, and nozzle assembly is used for into crushing chamber room
Ultrahigh speed air-flow is sprayed to crush bauxite；Magnetic component, magnetic component are arranged in the discharge port crushing chamber room of cabinet, with
The magnetisable material carried secretly in absorption bauxite；Noise reduction component, noise reduction component are arranged on the outer wall of cabinet；Multistage supporting member,
The bottom of cabinet is arranged in multistage supporting member, and when grinding device is in non-moving state, multistage supporting member is used for branch
The vibration that the mode buffer box body of support face contact is subject to；Collapsing structure, collapsing structure are arranged on multistage supporting member, crumple knot
The vibration that structure buffer box body in the form of crumple is subject to.
In some alternative embodiments, first charging aperture setting on the side wall of the box body or top, the second charging
Mouth setting is at the top of the box body or on side wall, so that the injection direction of bauxite and the injection direction of air-flow are perpendicular.
In some alternative embodiments, nozzle assembly includes multi-turn nozzle, multi-turn nozzle from the outer of spray gun ring to
The interior of spray gun ring is arranged along interval.
In some alternative embodiments, every circle nozzle includes multiple nozzles, and multiple nozzles are between the axial direction of spray gun ring
Every setting.
In some alternative embodiments, two adjacent circle nozzles are staggered and/or adjacent two enclose nozzles
Aperture it is different.
In some alternative embodiments, magnetic component includes the first magnetic part and the second magnetic part, the first magnetic part
The two sides of the discharge port of cabinet are set with the second magnetic part.
In some alternative embodiments, the first magnetic part is magnet or metal；And/or the second magnetic part is gold
Category or magnet.
In some alternative embodiments, noise reduction component includes the first noise reduction layer and the second noise reduction layer, the first noise reduction layer
It is arranged on the outer wall of cabinet, the second noise reduction layer is arranged in the first noise reduction layer, and the thickness of the first noise reduction layer is greater than the second noise reduction
The thickness of layer.
In some alternative embodiments, multistage supporting member includes the first order branch that the bottom margin of cabinet is arranged in
It supports component and the second level supporting member of the bottom centre of cabinet is set；First order supporting member is arranged in the first impact
The impact force that buffer box body is subject under state；Second level supporting member is arranged under the second impact conditions support structure with the first order
The impact force that the common buffer box body of part is subject to；Wherein, the impact force under the first impact conditions is less than rushing under the second impact conditions
Hit power.
In some alternative embodiments, collapsing structure include be arranged in the first crumple groove of first order supporting member with
And the second crumple groove on the supporting member of the second level is set, the first crumple groove is used under the first impact conditions with the shape of crumple
The vibration that formula buffer box body is subject to, the second crumple groove are used under the second impact conditions what the buffer box body in the form of crumple was subject to
Vibration.
Grinding device of the invention conveys bauxite into crushing chamber room by feed pipe, by jet pipe to crushing
Steam, the spray gun ring that the second end of jet pipe is equipped with are conveyed in chamber, and are equipped with nozzle assembly by being arranged on spray gun ring
Ultrahigh speed air-flow is sprayed into crushing chamber room to crush bauxite, improves and crush quality, save grinding time, improve and crush effect
Rate；Noise reduction component is arranged on the outer wall of cabinet, avoids noise pollution, protects operating staff health；Magnetic component is set
It sets in the discharge port crushing chamber room of cabinet, to adsorb the magnetisable material carried secretly in bauxite, reduces magnetic material in bauxite
The content of matter is conducive to the resource utilization in later period, has recycled magnetisable material, improves the utilization rate of bauxite；Multistage support
The bottom of cabinet is arranged in component, more when grinding device is in non-moving state (i.e. the bottom of cabinet and support face contact)
Grade supporting member avoids cabinet high vibration for the vibration that buffer box body receives in a manner of supporting face contact；Crumple knot
Structure is arranged on multistage supporting member, and it is violent to avoid cabinet for the vibration that collapsing structure buffer box body in the form of crumple is subject to
Vibration, avoids and damages grinding device, extend the service life of crushing member.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of grinding device provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of cabinet provided in an embodiment of the present invention.
Appended drawing reference:
Wherein, 1, cabinet；11, first charging aperture；12, second charging aperture；13, discharge port；2, feed pipe；3, air jet pipe
Road；31, spray gun ring；32, nozzle assembly；4, magnetic component；41, the first magnetic part；42, the second magnetic part；5, noise reduction component；
51, the first noise reduction layer；52, the second noise reduction layer；6, multistage supporting member；61, first order supporting member；62, the second level supports structure
Part；7, collapsing structure；71, the first crumple groove；72, the second crumple groove.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the range of the invention patent protection.
It should be noted that in the description of the present invention, term " center ", "upper", "lower", "left", "right", "vertical",
The direction of the instructions such as "horizontal", "inner", "outside" or the term of positional relationship are direction based on the figure or positional relationship, this
It is intended merely to facilitate description, rather than indication or suggestion device or element must have a particular orientation, with specific orientation
Construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only,
It is not understood to indicate or imply relative importance.
Fig. 1 and Fig. 2, Fig. 1 are the structural schematic diagram of grinding device provided in an embodiment of the present invention by ginseng；Fig. 2 is the present invention
The structural schematic diagram for the cabinet that embodiment provides.As shown in Figure 1, the present invention provides a kind of high-strength wearable, bauxite productions to use
Raw material grinding device, grinding device include: cabinet 1, are equipped in cabinet 1 and crush chamber；Feed pipe 2, the first of feed pipe 2
End is connect with the conveyance conduit of bauxite, and the second end of feed pipe 2, which passes through the first charging aperture 11 of cabinet 1 and crushes chamber, to be connected
It is logical, for conveying bauxite into crushing chamber room；The first end of jet pipe 3, jet pipe 3 is connect with feeder, jet
The second end of pipeline 3 passes through the second charging aperture 12 of cabinet 1 and crushes chamber, and the second end of jet pipe 3 is equipped with spray gun
Ring 31, spray gun ring 31 are equipped with nozzle assembly 32, and nozzle assembly 32 is used to spray ultrahigh speed air-flow into crushing chamber room with by aluminium
Native miberal powder is broken；Magnetic component 4, magnetic component 4 are arranged in the 13 crushing chamber room of discharge port of cabinet 1, are pressed from both sides with adsorbing in bauxite
The magnetisable material of band；Noise reduction component 5, noise reduction component 5 are arranged on the outer wall of cabinet 1；Multistage supporting member 6, multistage support structure
The bottom of cabinet 1 is arranged in part 6, and when grinding device is in non-moving state, multistage supporting member 6 is used for support face contact
The vibration that is subject to of mode buffer box body 1；Collapsing structure 7, collapsing structure 7 be arranged on multistage supporting member, collapsing structure 7 with
The vibration that the form buffer box body 1 of crumple is subject to.
Grinding device of the invention conveys bauxite into crushing chamber room by feed pipe 2, by jet pipe 3 to powder
Steam, the spray gun ring 31 that the second end of jet pipe 3 is equipped with are conveyed in broken chamber, and are equipped with spray by being arranged on spray gun ring 31
Nozzle assembly 32 sprays ultrahigh speed air-flow into crushing chamber room to crush bauxite, improves and crushes quality, saves grinding time, mentions
High crush efficiency；Noise reduction component 5 is arranged on the outer wall of cabinet 1, avoids noise pollution, protects operating staff health；
Magnetic component 4 is arranged in the 13 crushing chamber room of discharge port of cabinet 1, to adsorb the magnetisable material carried secretly in bauxite, reduces
The content of magnetisable material in bauxite, is conducive to the resource utilization in later period, has recycled magnetisable material, improves the benefit of bauxite
With rate；The bottom of cabinet 1 is arranged in multistage supporting member 6, when grinding device be in non-moving state (i.e. the bottom of cabinet 1 with
Support face contact) when, multistage supporting member 6 avoids case for the vibration that buffer box body 1 receives in a manner of supporting face contact
1 high vibration of body；Collapsing structure 7 be arranged on multistage supporting member, collapsing structure 7 in the form of crumple buffer box body 1 by
Vibration, avoid 1 high vibration of cabinet, avoid and damage grinding device, extend the service life of crushing member.
In a kind of optional embodiment, as shown in Figure 1, first charging aperture 11 is arranged on the side wall of cabinet 1, second into
The top of cabinet 1 is arranged in material mouth 12, so that the injection direction of bauxite and the injection direction of air-flow are perpendicular.Certainly, first
The setting position of feed inlet 11 and second charging aperture 12 is not limited to the above-mentioned position enumerated, and those skilled in the art can be neatly
It adjusts and is arranged, such as first charging aperture 11 is arranged in the top of cabinet 1, the side wall of cabinet 1 is arranged in second charging aperture 12
On, so that the injection direction of bauxite and the injection direction of air-flow are perpendicular.
In a kind of optional embodiment, as shown in Figure 1, nozzle assembly 32 includes three circle nozzles, three circle nozzles are by spray gun
The outer of ring 31 is arranged to the interior of spray gun ring 31 along interval.Certainly, the circle number of nozzle and setting position are not limited to above-mentioned enumerate
Number and setting position are enclosed, those skilled in the art can neatly adjust in practical applications and be arranged circle number and the setting of nozzle
Position.
Preferably, every circle nozzle includes five nozzles, and five nozzles are arranged around the axially spaced-apart of spray gun ring 31, it is equidistant or
The non-spaced set of person.Certainly, the quantity of nozzle and set-up mode are not limited to the above-mentioned quantity enumerated and set-up mode, this field
Technical staff can neatly adjust in practical applications and be arranged the quantity and set-up mode of nozzle.
Preferably, two adjacent circle nozzles are staggered.
Preferably, the aperture of two adjacent circle nozzles is different.
Further, the aperture of nozzle is gradually reduced from the outer of spray gun ring 31 to the interior edge of spray gun ring 31.
In a kind of optional embodiment, as shown in Figure 1, magnetic component 4 includes the first magnetic part 41 and the second magnetic part
42, the two sides of the discharge port 13 of cabinet 1 are arranged in the first magnetic part 41 and the second magnetic part 42, are carried secretly in bauxite with adsorbing
Magnetisable material reduces the content of magnetisable material in bauxite, is conducive to the resource utilization in later period, has recycled magnetisable material,
Improve the utilization rate of bauxite.
Preferably, the first magnetic part 41 and the second magnetic part 42 are about the setting substantially symmetrical about its central axis of discharge port 13 in cabinet 1
Discharge port 13 two sides.
Preferably, the first magnetic part 41 is magnet, and the second magnetic part 42 is metal；Or first magnetic part 41 be metal,
Second magnetic part 42 is magnet.
In a kind of optional embodiment, as shown in Figure 1, noise reduction component 5 includes the first noise reduction layer 51 and the second noise reduction layer
52, the first noise reduction layer 51 is arranged on the outer wall of cabinet 1, and the second noise reduction layer 52 is arranged in the first noise reduction layer 51, the first noise reduction
The thickness of layer 51 is greater than the thickness of the second noise reduction layer 52.
Preferably, the first noise reduction layer 51 and the second noise reduction layer 52 are prepared using quieter material.
Preferably, density of the density of the first noise reduction layer 51 less than the second noise reduction layer 52.
In a kind of optional embodiment, as shown in Figure 1, multistage supporting member 6 includes the bottom margin that cabinet 1 is arranged in
First order supporting member；When grinding device is in non-moving state (i.e. the bottom of cabinet 1 and support face contact), and the
Under one impact conditions (when the impact force that cabinet 1 is subject to is smaller), first order supporting member and support face contact are to buffer box body 1
The impact force being subject to avoids entire bottom surface and the support face contact of cabinet 1, avoids because supporting surface is uneven or cabinet 1
And ground deformation and make cabinet 1 support shakiness, improve cabinet 1 support stability.
Preferably, first order supporting member includes the fin or boss that the bottom margin of cabinet 1 is arranged in.
Preferably, multistage supporting member 6 includes the second level supporting member 62 that the bottom centre of cabinet 1 is arranged in；Work as powder
When crushing device is in non-moving state (i.e. the bottom of cabinet 1 and support face contact), and under the second impact conditions (cabinet 1 by
When the impact force arrived is larger), second level supporting member 62 and support face contact increase the contact area of cabinet 1 Yu supporting surface,
So as to the impact force that preferably buffer box body 11 is subject to, entire bottom surface and the support face contact of cabinet 11 are avoided, is avoided
Because supporting surface is uneven or cabinet 1 due to ground deformation and make cabinet 1 support shakiness, improve the stabilization of the support of cabinet 1
Property.At this point, second level supporting member 62 still is able to what buffer box body 11 well was subject to even if first order supporting member damages
Impact force.
Preferably, second level supporting member 62 includes fin, boss or the bracket that the bottom centre of cabinet 1 is arranged in.
Preferably, in the state of non-be hit, the spacing between first order supporting member and supporting surface is less than the second level
Spacing between supporting member 62 and supporting surface enables first order supporting member to connect under the first impact conditions with supporting surface
Touch the impact force that is subject to buffer box body 1, enable second level supporting member 62 under the second impact conditions with first order branch
The impact force that support component is subject to jointly with support face contact with buffer box body 1.
Preferably, supporting surface is the surface of ground or support platform.
Preferably, the impact force under the first impact conditions is less than the impact force under the second impact conditions.
In a kind of optional embodiment, as shown in Figure 1, collapsing structure 7 includes that first order supporting member is arranged in
One crumple groove 71, the first crumple groove 71 is for the vibration that buffer box body 1 is subject in the form of crumple under the first impact conditions.
Preferably, the quantity of the first crumple groove 71 is multiple, week of multiple first crumple grooves 71 around first order supporting member
To setting.
Preferably, collapsing structure 7 further includes the second crumple groove 72 being arranged on second level supporting member 62, the second crumple
Slot 72 is for the vibration that buffer box body 1 is subject in the form of crumple under the second impact conditions.
Preferably, the quantity of the second crumple groove 72 is multiple, and multiple second crumple grooves 72 are around second level supporting member 62
Circumferential setting.
In a kind of optional embodiment, although not shown in the drawings, grinding device further include be arranged in it is more in cabinet 11
A deflector, multiple deflectors are staggered along the first charging aperture 11 of cabinet 1 to the direction of the discharge port 13 of cabinet 1, so that
Forming curves type flow-guiding channel in accommodating chamber.
Preferably, deflector is arcuate structure, and arcuate structure further extends the length of flow-guiding channel, to improve
Diversion effect.
Preferably, deflector is equipped with electrostatic coating, it is therefore prevented that bauxite is adhered on deflector.
Preferably, the bottom of cabinet 1 is equipped with damping component, for improving the effectiveness in vibration suppression of grinding device.
Preferably, the inside of cabinet 1 is equipped with particle size sensor, and particle size sensor is used to detect the granularity of bauxite.
It further include controller, controller controls grinding device according to the testing result of particle size sensor and crushed.Control
Device is the controller either mobile client terminal that grinding device carries.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of high-strength wearable, bauxite production raw material grinding device, which is characterized in that the grinding device includes:
Cabinet, interior be equipped with of the cabinet crush chamber；
Feed pipe, the first end of the feed pipe and the conveyance conduit of bauxite connect, the second end of the feed pipe
First charging aperture and the crushing chamber across the cabinet, for conveying bauxite into the crushing chamber room；
The first end of jet pipe, the jet pipe is connect with feeder, and the second end of the jet pipe passes through described
The second end of the second charging aperture of cabinet and the crushing chamber, the jet pipe is equipped with spray gun ring, the spray gun ring
It is equipped with nozzle assembly, the nozzle assembly is used to spray ultrahigh speed air-flow into the crushing chamber room to crush bauxite；
Magnetic component, the magnetic component are arranged in the discharge port crushing chamber room of the cabinet, are carried secretly with adsorbing in bauxite
Magnetisable material；
Noise reduction component, the noise reduction component are arranged on the outer wall of the cabinet；
Multistage supporting member, the bottom of the cabinet is arranged in the multistage supporting member, when the grinding device is in non-shifting
When dynamic state, the multistage supporting member in a manner of supporting face contact for buffering the vibration that the cabinet is subject to；
Collapsing structure, on the multistage supporting member, the collapsing structure is delayed in the form of crumple for the collapsing structure setting
Rush the vibration that the cabinet is subject to.
2. grinding device according to claim 1, which is characterized in that the side of the cabinet is arranged in the first charging aperture
Perhaps the top second charging aperture is arranged on top or the side wall of the cabinet on wall, so that the injection side of bauxite
To perpendicular with the injection direction of air-flow.
3. grinding device according to claim 1, which is characterized in that the nozzle assembly includes multi-turn nozzle, described more
Nozzle is enclosed to be arranged from the outer of the spray gun ring to the interior of the spray gun ring along interval.
4. grinding device according to claim 3, which is characterized in that every circle nozzle includes multiple nozzles, the multiple spray
Mouth is arranged around the axially spaced-apart of the spray gun ring.
5. grinding device according to claim 4, which is characterized in that two adjacent circle nozzles are staggered, and/or
The aperture of two adjacent circle nozzles is different.
6. grinding device according to claim 1, which is characterized in that the magnetic component includes the first magnetic part and second
The two sides of the discharge port of the cabinet are arranged in magnetic part, first magnetic part and second magnetic part.
7. grinding device according to claim 6, which is characterized in that first magnetic part is magnet or metal；And/
Or second magnetic part is metal or magnet.
8. grinding device according to claim 1, which is characterized in that the noise reduction component includes the first noise reduction layer and second
Noise reduction layer, first noise reduction layer are arranged on the outer wall of the cabinet, and second noise reduction layer is arranged in first noise reduction
On layer, the thickness of first noise reduction layer is greater than the thickness of second noise reduction layer.
9. grinding device according to claim 1, which is characterized in that the multistage supporting member includes being arranged in the case
The first order supporting member of the bottom margin of body and be arranged in the cabinet bottom centre second level supporting member；
The first order supporting member is arranged to buffer the impact force that the cabinet is subject under the first impact conditions；
Described in the second level supporting member is arranged under the second impact conditions to buffer jointly with the first order supporting member
The impact force that cabinet is subject to；
Wherein, the impact force under the first impact conditions is less than the impact force under the second impact conditions.
10. grinding device according to claim 9, which is characterized in that the collapsing structure includes being arranged described first
First crumple groove of grade supporting member and the second crumple groove being arranged on the second level supporting member, first crumple
Slot is used for for buffering the vibration that the cabinet is subject to, second crumple groove in the form of crumple under the first impact conditions
The vibration that the cabinet is subject to is buffered under second impact conditions in the form of crumple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811164759.8A CN109290024A (en) | 2018-10-07 | 2018-10-07 | A kind of high-strength wearable, bauxite production raw material grinding device |
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|---|---|---|---|
| CN201811164759.8A CN109290024A (en) | 2018-10-07 | 2018-10-07 | A kind of high-strength wearable, bauxite production raw material grinding device |
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Cited By (1)
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| CN109568033A (en) * | 2019-02-15 | 2019-04-05 | 青岛大学附属医院 | A kind of stretcher of patient easy to remove |
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| CN107262203A (en) * | 2017-07-20 | 2017-10-20 | 徐俊浩 | A kind of mine stone crusher for possessing dedusting function |
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