CN207857044U - A kind of organic fertilizer grinding device - Google Patents
A kind of organic fertilizer grinding device Download PDFInfo
- Publication number
- CN207857044U CN207857044U CN201721855996.XU CN201721855996U CN207857044U CN 207857044 U CN207857044 U CN 207857044U CN 201721855996 U CN201721855996 U CN 201721855996U CN 207857044 U CN207857044 U CN 207857044U
- Authority
- CN
- China
- Prior art keywords
- organic fertilizer
- roll shaft
- box
- shaft
- screening plant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003895 organic fertilizer Substances 0.000 title claims abstract description 52
- 238000000227 grinding Methods 0.000 title claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 33
- 238000012216 screening Methods 0.000 claims abstract description 25
- 230000001877 deodorizing effect Effects 0.000 claims abstract description 13
- 239000003337 fertilizer Substances 0.000 claims abstract description 10
- 238000004332 deodorization Methods 0.000 claims abstract description 4
- 238000009298 carbon filtering Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 10
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 5
- 229910021529 ammonia Inorganic materials 0.000 abstract description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 5
- ZFRKQXVRDFCRJG-UHFFFAOYSA-N skatole Natural products C1=CC=C2C(C)=CNC2=C1 ZFRKQXVRDFCRJG-UHFFFAOYSA-N 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000622 irritating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Fertilizers (AREA)
Abstract
The utility model discloses a kind of organic fertilizer grinding devices, belong to organic fertilizer grinding device technical field, for solving the problem of that machine fertilizer crushes foul smell timely processing in uneven crushing process.Including crush box, box for feeding odd and deodorizing case, box for feeding odd is provided with cutting tool；Crush box is provided with the first roll shaft and the second roll shaft being mutually adapted, first roll shaft and the second roll shaft, which cover, is provided with multiple crushing knife tools, it is provided with tilted-putted screening plant below first roll shaft and the second roll shaft, screening plant lower end is provided with the first conveying device, first conveying device is mutually adapted with discharge port, the low one end of screening plant is provided with lifting device, and lifting device is equipped with the second conveying device；Cutting box is connected with deodorizing case, and deodorizing case is provided with activated carbon adsorption device, and carrying out absorption to ammonia, hydrogen sulfide, scatol etc. in foul smell achievees the effect that deodorization.
Description
Technical field
The utility model is related to agricultural fertilizer engineering device technique fields, more particularly to a kind of organic fertilizer grinding device.
Background technology
It is mainly derived from plant and (or) animal, imposes on soil to provide the carbon containing object that plant nutrient is its major function
Material.Through biological substance, animals and plants waste, plant residue processing, poisonous and harmful substance therein is eliminated, rich in a large amount of
Benefit materials, including：A variety of organic acids, peptides and the abundant nutrient including nitrogen, phosphorus, potassium.It can not only be agriculture
Crop provides full nutrition, and fertilizer efficiency is long, can increase and update the soil organism, promotes microbial reproduction, improves soil
Physicochemical property and bioactivity.
By retrieval, to disclose a kind of organic fertilizer quick for the patent that Chinese Patent Application No. is CN201720356206.7
Breaker, including device body, described device ontology are hollow structure, and the top of described device ontology is hinged with appliance cover,
Described device inner body wall side is equipped with electric rotating machine, and the electric rotating machine is connected with shaft, the shaft by output shaft
Side far from electric rotating machine is arranged with fixed block, and rotation axis is equipped between the fixed block, is arranged in the rotation axis
Fixed column offers pentagon groove in the fixed column, agitating shaft is movably equipped in described device ontology.The utility model knot
Structure is simple, and production cost is low, and agitating shaft and mixing blade can be quickly dismantled out of device body, be convenient to clean mixing blade and
The stalk wound on agitating shaft reduces the live load of electric rotating machine so that electric rotating machine can drive agitating shaft and stirring blade
Piece fast-crushing stalk, meets the use demand of people.
Organic fertilizer is pressed into bulk in preparation process, needs to crush blocky organic fertilizer, in order to applying fertilizer and
Amount of application when control fertilising, but organic fertilizer block density is big, and blocky organic fertilizer is directly added into agitating device, organic fertilizer exists
Gravitional force is changed into kinetic energy in dropping process, and technical ability is rushed with larger when being in contact with cutter, can be caused to cutter
Damage reduces cutting-tool's used life, which only carries out simple agitation by agitating shaft to fertilizer, broken uneven,
Crushing effect is bad, and the irritative gas such as ammonia, hydrogen sulfide, scatol and methane are contained in organic fertilizer.
Utility model content
The purpose of this utility model is that：Uneven, foul smell timely processing in crushing process is crushed in order to solve organic fertilizer
The problem of, the utility model provides a kind of organic fertilizer grinding device.
The utility model specifically uses following technical scheme to achieve the goals above：
A kind of organic fertilizer grinding device, including crush box, the crush box upper end are provided with feed inlet, under the crush box
End is provided with discharge port, which is characterized in that further includes cutting box, box for feeding odd and deodorizing case, the box for feeding odd is mutually suitable with cutting
Match, the cutting box is provided with live spindle, and the first driving motor is connected between the live spindle, and the live spindle is connected with
Multiple cutting tools for organic fertilizer be tentatively crushed；The crush box is provided with the first roll shaft being mutually adapted and
Two roll shafts, first roll shaft and the second roll shaft, which cover, is provided with multiple crushing knife tools, under first roll shaft and the second roll shaft
Side is provided with tilted-putted screening plant, and the screening plant lower end is provided with the first conveying device, the first conveying dress
It sets and is mutually adapted with discharge port, the low one end of the screening plant is provided with lifting device, and the lifting device is equipped with second
Conveying device；The deodorizing case is provided with suction ventilator, and the suction ventilator is connected with air intake duct, the other end of the air intake duct with cut
It cuts case to be interconnected, the deodorizing case is divided into inlet channel and outlet passageway, and the inlet channel is provided with the cloth for dedusting
Bag dust-extraction unit, the outlet passageway are disposed with the first filter device and the second filter device, the outlet from bottom to up
Channel is provided with gas outlet.
Preferably, the box for feeding odd is provided with hydraulic press, and the hydraulic press is connected with telescopic shaft, and the telescopic shaft upper end is set
It is equipped with the placement plate for placing fertilizer, hydraulic lifting system can guarantee a large amount of stationarities having in fertilizer transmission process.
Preferably, the live spindle is provided with multiple fixed seats, and the fixed seat is connected with cutting tool, convenient for cutting
The replacement and cleaning of cutter tool.
Preferably, the crushing knife tool includes blade and knife rest, and the blade is connected with knife rest by fixed pin, is convenient for
Blade is replaced and cleaning.
Preferably, first roll shaft is equipped with first rotating shaft, and the first rotating shaft is arranged with the first driven wheel, and described
Two roll shafts are equipped with the second shaft, and second shaft is connected with the second driven wheel, and first driven wheel is engaged with driving wheel,
The driving wheel is engaged with third driven wheel, and the third driven wheel and the second driven wheel are intermeshed, and the driving wheel is arranged
There is the second driving motor, the opposite rotation of the first roll shaft and the second roll shaft is only achieved that by a driving motor, to organic
Fertilizer carries out rolling crushing.
Preferably, first filter device and the second filter device are active carbon filtering device, to ammonia in foul smell,
Hydrogen sulfide, scatol etc. carry out absorption and achieve the effect that deodorization.
Preferably, the screening plant lower end is provided with shaking device, and the organic fertilizer for meeting granularity requirements is made to fall to
In one conveying device, make the organic fertilizer for being unsatisfactory for granularity requirements that can smoothly glide on shaking device, organic fertilizer is avoided to screen
It results in blockage on device.
The operation principle and the course of work of the utility model be:
Organic fertilizer is added into cutting box by material feeding box, material feeding box is provided with hydraulic lift, by blocky organic fertilizer
Be transported in cutting box, by the cutting tool in cutting box, preliminary cutting carried out to organic fertilizer, by organic fertilizer cut into compared with
Small bulk；The discharge port of cutting box is the feed inlet of crush box, passes through charging by the organic fertilizer that cutting box is tentatively cut
Mouth enters in crush box, and organic fertilizer is fallen on the first roll shaft and the second roll shaft, and the second driving motor drives the driving wheel inverse time
Needle rotates, and drives the first driven wheel to rotate clockwise and is rotated clockwise with third driven wheel, the drive second of third driven wheel is driven
Wheel rotates counterclockwise, and realizes the opposite rotation of the first roll shaft and the second roll shaft, is realized to fertilizer and squeezes crushing；The organic fertilizer of crushing
It falls on screening plant, screening plant slant setting, organic fertilizer can glide on screening plant, meet during downslide
The organic fertilizer of granularity requirements is fallen in the first conveying device, is transported outside crush box by the first conveying device, and vibrations are passed through
Vibrations of the device to screening plant, avoid organic fertilizer from resulting in blockage on screening plant, and the excessive material of granularity is in screening plant
On slip down on lifting device, transported under the action of lifting device in the second conveying device being mutually adapted, make the first roller
The axis organic fertilizer excessive to granularity with the second roll shaft crushes, and the first conveying dress is fallen to after meeting granule size requirement
It sets and then is transported outside crush box as finished product；During the work time, the foul smell that organic fertilizer generates is passed through by the effect of suction ventilator
Air intake duct is absorbed into deodorizing case, and bag filter is provided in inlet channel, absorbs dust, and gas enters outlet passageway,
The first filter device and the second filter device are provided in outlet passageway, the first filter device and the second filter device are work
Property charcoal adsorbent equipment, the ammonia contained in foul smell, hydrogen sulfide, scatol etc. are adsorbed, the gas being discharged in environment is made
It is pure.
The beneficial effects of the utility model are as follows：
By setting cutting box, organic fertilizer is tentatively cut, excessive organic fertilizer is avoided to be directly appended to crush box,
The impact energy that organic fertilizer whereabouts has causes to damage to crushing knife tool, reduces the service life of crushing knife tool；Organic fertilizer is cut
At smaller piece shape, organic fertilizer is crushed convenient for the first roll shaft and the second roll shaft.
Screening plant will meet on the organic filter to the first conveying device of granule size, through the first conveying device by finished product
It is transported to outside crush box, is unsatisfactory for the boosted machine of organic fertilizer of granularity requirements and the second conveying device carries out cycle and is crushed, until
Meet granularity requirements.
Screening plant is equipped with shaking device, and organic fertilizer is avoided to be blocked on shaking device, meets the material of granularity condition
Cannot smoothly from the gap on shaking device downstairs.
Cutting tool is detachable with crushing knife tool, is conveniently replaceable and cleans.
By the way that deodorization device is arranged, by the course of work, the odorous gas of organic fertilizer volatilization absorbs, by the ammonia in gas
Gas, hydrogen sulfide, scatol etc. are adsorbed by adsorbent equipment.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structure intention of the first roll shaft and the second roll shaft；
Fig. 3 is the first roll shaft structure schematic diagram；
Fig. 4 is the rotation schematic diagram of gear；
Fig. 5 is the structural schematic diagram of screening plant；
Reference numeral：1- crush boxes, the first roll shafts of 2a-, the second roll shafts of 2b-, the first conveying devices of 3a-, 3b- second are conveyed
Device, 4- deodorizing cases, the first filter devices of 5a-, the second filter devices of 5b-, 6a- inlet channels, 6b- outlet passageways, 7- cloth bags
Dust-extraction unit, the gas outlets 8-, 9- suction ventilators, 10- air intake ducts, the first driving motors of 11a-, the second driving motors of 11b-, 12- rotations
Turn main shaft, 13- cutting boxes, 14- fixed seats, 15- cutting tools, 16- box for feeding odd, 17a- feed inlets, 17b- discharge ports, 18- puts
Set plate, 19- screening plants, 20- telescopic shafts, 21- shaking devices, 22- hydraulic presses, 23- blades, 24- fixed pins, 25- knife rests,
The first driven wheels of 26a-, the second driven wheels of 26b-, 27- driving wheels, 28- third driven wheels, 29a- first rotating shafts, second turn of 29b-
Axis, 30- lifting devices, 31- crushing knife tools.
Specific implementation mode
In order to which those skilled in the art are better understood from the utility model, below in conjunction with the accompanying drawings with following embodiment to this
Utility model is described in further detail.
The organic fertilizer grinding device of the utility model, including crush box 1,1 upper end of the crush box are provided with feed inlet
17a, 1 lower end of the crush box are provided with discharge port 17b, which is characterized in that further include cutting box 13, box for feeding odd 16 and deodorizing case
4, the box for feeding odd 16 is mutually adapted with cutting, and the cutting box 13 is provided with live spindle 12, and the live spindle 12 is indirect
There are the first driving motor 11a, the live spindle 12 to be connected with multiple for carrying out tentatively broken cutting tool to organic fertilizer
15；The crush box 1 is provided with the first roll shaft 2a being mutually adapted and the second roll shaft 2b, the first roll shaft 2a and the second roll shaft
2b, which covers, is provided with multiple crushing knife tools 31, and tilted-putted screening is provided with below the first roll shaft 2a and the second roll shaft 2b
Device 19,19 lower end of the screening plant are provided with the first conveying device 3a, the first conveying device 3a and discharge port 17b phases
Mutually adaptation, the low one end of the screening plant 19 are provided with lifting device 30, and the lifting device 30 is equipped with the second conveying dress
Set 3b；The deodorizing case 4 is provided with suction ventilator 9, and the suction ventilator 9 is connected with air intake duct 10, the other end of the air intake duct 10
It is interconnected with cutting box 13, the deodorizing case 4 divides to be provided with for inlet channel 6a and outlet passageway 6b, the inlet channel 6a
For the bag-type dust collector 7 of dedusting, the outlet passageway 6b is disposed with the first filter device 5a and second from bottom to up
Filter device 5b, the outlet passageway 6b are provided with gas outlet 8.
Preferably, the box for feeding odd 16 is provided with hydraulic press 22, and the hydraulic press 22 is connected with telescopic shaft 20, described flexible
20 upper end of axis is provided with the placement plate 18 for placing fertilizer.
Preferably, the live spindle 12 is provided with multiple fixed seats 14, and the fixed seat 14 is connected with cutting tool 15
It connects.
Preferably, the crushing knife tool 31 includes blade 23 and knife rest 25, and the blade 23 passes through fixed pin 24 and knife rest
25 are connected.
Preferably, the first roll shaft 2a is equipped with first rotating shaft 29a, and it is driven that the first rotating shaft 29a is arranged with first
Take turns 26a, the second roll shaft 2b is equipped with the second shaft 29b, and the second shaft 29b is connected with the second driven wheel 26b, described
First driven wheel 26a is engaged with driving wheel 27, and the driving wheel 27 is engaged with third driven wheel 28, the third driven wheel 28 with
Second driven wheel 26b intermeshings, the driving wheel 27 are equipped with the second driving motor 11b.
Preferably, the first filter device 5a and the second filter device 5b is active carbon filtering device.
Preferably, 19 lower end of the screening plant is provided with shaking device 21.
Preferably, the box for feeding odd 16 can also be that organic fertilizer is transported in cutting box 13 in a manner of conveyer belt.
Preferably, the box for feeding odd 16 can also continue organic fertilizer being transported to cutting box 13 with crawler type lifting device
It is interior.
Preferably, the shaking device 19 is porous web plate.
Preferably, the shaking device 19 can also be castor item.
The above, the only preferred embodiment of the utility model, are not intended to limit the utility model, the utility model
Scope of patent protection be subject to claims, it is equivalent made by every specification and accompanying drawing content with the utility model
Structure change similarly should be included in the scope of protection of the utility model.
Claims (7)
1. a kind of organic fertilizer grinding device, including crush box (1), crush box (1) upper end is provided with feed inlet (17a), institute
It states crush box (1) lower end and is provided with discharge port (17b), which is characterized in that further include cutting box (13), box for feeding odd (16) and deodorization
Case (4), the box for feeding odd (16) are mutually adapted with cutting, and the cutting box (13) is provided with live spindle (12), the rotation
The first driving motor (11a) is connected between main shaft (12), the live spindle (12) is connected with multiple for being carried out just to organic fertilizer
The broken cutting tool (15) of step；The crush box (1) is provided with the first roll shaft (2a) being mutually adapted and the second roll shaft (2b),
First roll shaft (2a) and the second roll shaft (2b), which covers, is provided with multiple crushing knife tools (31), first roll shaft (2a) and the
It is provided with tilted-putted screening plant (19) below two roll shafts (2b), screening plant (19) lower end is provided with the first conveying
Device (3a), first conveying device (3a) are mutually adapted with discharge port (17b), and the low one end of the screening plant (19) is set
It is equipped with lifting device (30), the lifting device (30) is equipped with the second conveying device (3b)；The deodorizing case (4) is provided with suction
Wind turbine (9), the suction ventilator (9) are connected with air intake duct (10), and the other end and cutting box (13) of the air intake duct (10) are mutual
Connection, the deodorizing case (4) are divided into inlet channel (6a) and outlet passageway (6b), and the inlet channel (6a) is provided with for removing
The bag-type dust collector (7) of dirt, the outlet passageway (6b) are disposed with the first filter device (5a) and second from bottom to up
Filter device (5b), the outlet passageway (6b) are provided with gas outlet (8).
2. organic fertilizer grinding device according to claim 1, which is characterized in that the box for feeding odd (16) is provided with hydraulic press
(22), the hydraulic press (22) is connected with telescopic shaft (20), and telescopic shaft (20) upper end is provided with for placing putting for fertilizer
Set plate (18).
3. organic fertilizer grinding device according to claim 1, which is characterized in that the live spindle (12) is provided with multiple
Fixed seat (14), the fixed seat (14) are connected with cutting tool (15).
4. organic fertilizer grinding device according to claim 1, which is characterized in that the crushing knife tool (31) includes blade
(23) it is connected with knife rest (25) by fixed pin (24) with knife rest (25), the blade (23).
5. organic fertilizer grinding device according to claim 1, which is characterized in that first roll shaft (2a) is equipped with first
Shaft (29a), the first rotating shaft (29a) are arranged with the first driven wheel (26a), and second roll shaft (2b) is equipped with second turn
Axis (29b), second shaft (29b) are connected with the second driven wheel (26b), and first driven wheel (26a) is engaged with actively
It takes turns (27), the driving wheel (27) is engaged with third driven wheel (28), the third driven wheel (28) and the second driven wheel (26b)
Intermeshing, the driving wheel (27) are equipped with the second driving motor (11b).
6. organic fertilizer grinding device according to claim 1, which is characterized in that first filter device (5a) and second
Filter device (5b) is active carbon filtering device.
7. organic fertilizer grinding device according to claim 1, which is characterized in that screening plant (19) lower end is provided with
Shaking device (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721855996.XU CN207857044U (en) | 2017-12-27 | 2017-12-27 | A kind of organic fertilizer grinding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721855996.XU CN207857044U (en) | 2017-12-27 | 2017-12-27 | A kind of organic fertilizer grinding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207857044U true CN207857044U (en) | 2018-09-14 |
Family
ID=63466647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721855996.XU Expired - Fee Related CN207857044U (en) | 2017-12-27 | 2017-12-27 | A kind of organic fertilizer grinding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207857044U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280382A (en) * | 2019-07-12 | 2019-09-27 | 南京科技职业学院 | A kind of magnetic iron ore pretreatment unit |
-
2017
- 2017-12-27 CN CN201721855996.XU patent/CN207857044U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280382A (en) * | 2019-07-12 | 2019-09-27 | 南京科技职业学院 | A kind of magnetic iron ore pretreatment unit |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180914 |