CN107140333A - A kind of limestone powder bin - Google Patents
A kind of limestone powder bin Download PDFInfo
- Publication number
- CN107140333A CN107140333A CN201710521003.3A CN201710521003A CN107140333A CN 107140333 A CN107140333 A CN 107140333A CN 201710521003 A CN201710521003 A CN 201710521003A CN 107140333 A CN107140333 A CN 107140333A
- Authority
- CN
- China
- Prior art keywords
- warehouse
- circular cone
- limestone powder
- powder bin
- cylinder
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/546—Devices for loading or unloading and forming part of the container, e.g. rollers, conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/26—Hoppers, i.e. containers having funnel-shaped discharge sections
- B65D88/32—Hoppers, i.e. containers having funnel-shaped discharge sections in multiple arrangement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
- B65D88/703—Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/48—Devices for emptying otherwise than from the top using other rotating means, e.g. rotating pressure sluices in pneumatic systems
- B65G65/4881—Devices for emptying otherwise than from the top using other rotating means, e.g. rotating pressure sluices in pneumatic systems rotating about a substantially horizontal axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/185—Preventing escape of dust by means of non-sealed systems
- B65G69/186—Preventing escape of dust by means of non-sealed systems with aspiration means
Abstract
The invention discloses a kind of limestone powder bin, including：Warehouse, it includes the cylinder warehouse and circular cone warehouse of connection；Drawing mechanism, it is arranged on the circular cone warehouse bottom and communicated with the circular cone warehouse bottom, and two drawing mechanisms are symmetrically mounted on the circular cone warehouse bottom；Device for discharging, it is connected with the drawing mechanism discharging opening, and discharging opening of two devices for discharging respectively with two drawing mechanisms is connected；Blowing device, it is installed through at the top of the cylinder warehouse；Dust arrester, it at the top of the cylinder warehouse with connecting.Beneficial effects of the present invention are：Be not likely to produce it is hardened, do not pollute the environment, will not be because discharging opening is blocked and stop desulfurization, while can also realize the accurate control of discharging.
Description
Technical field
The present invention relates to technical field of desulfurization, in particular to a kind of limestone powder bin.
Background technology
Desulfurization method of limestone-gypsum is the domestic most common sulfur removal technology used.The technique is using lime stone as de-
Sulphur agent is configured to lime stone slurry by adding process water, and lime stone slurry and the sulfur dioxide in flue gas react generation stone
Cream is to reach the purpose of desulfurization.The technique typically uses outsourcing agstone, and agstone is squeezed into fixed in limestone powder bin
Amount is used.
Conventional limestone powder cabin has the disadvantages that：
(1) agstone easily produces hardened phenomenon and blocks discharging opening, it is impossible to normal discharging；
(2) easily there is accumulation dead angle in use in Limestone silo, so causes the dischargeable capacity of powder cabin to subtract significantly
It is small, it is impossible to meet the storage time requirement of engineering production, and the lime stone powder at dead angle is easily hardened, it is necessary to periodically clear
Reason, is unfavorable for the utilization of agstone；
(3) when Limestone silo is fed every time, large quantities of lime stone flour can overflow from charging aperture, pollute the environment at scene；
(4) when agstone surplus is not enough, it is impossible to export all agstones, it is not thorough blowing occur, causes in storehouse
Dust accumulation, and output agstone accuracy can not estimate, it is impossible to control output quantity, easily cause waste；
(5) only one of which ash bucket, angle chooses problematic, and trouble point is more in operation, when often result in stoppages in transit, scene waste
A large amount of maintenance times, the continuous service requirement of desulfurization is often unsatisfactory for, also can not guarantee desulphurization system stable operation on time.
The content of the invention
To solve the above problems, it is an object of the invention to provide a kind of limestone powder bin, be not likely to produce it is hardened, will not be dirty
Contaminate environment, desulfurization will not be stopped because a discharging opening blocking, while can also realize the accurate control of discharging.
The invention provides a kind of limestone powder bin, including：
Warehouse, it includes the cylinder warehouse and circular cone warehouse of connection；
Drawing mechanism, it is arranged on the circular cone warehouse bottom and communicated with the circular cone warehouse bottom, is gone out described in two
Material device is symmetrically mounted on the circular cone warehouse bottom；
Device for discharging, it is connected with the drawing mechanism discharging opening, and two devices for discharging described in two respectively with going out
Expect the discharging opening connection of device；
Blowing device, it at the top of the cylinder warehouse with connecting；
Dust arrester, it at the top of the cylinder warehouse with connecting.
Improved as of the invention further, the drawing mechanism include the ash bucket connected with the circular cone warehouse bottom and
Angle C between the push-pull valve of ash bucket side wall, two ash buckets is 55 °~60 °.
As further improvement of the invention, the push-pull valve includes travelling carriage, sliding panel, roller assembly and plate electricity
The roller assembly is installed, the sliding panel is arranged on the roller assembly, and the plate motor drives on machine, the travelling carriage
The dynamic roller assembly is rotated, and is driven the sliding panel to reciprocate, is realized the opening and closing of the ash bucket discharging opening.
As further improvement of the invention, the device for discharging includes the meter being arranged on conveying pipeline, described
The feeding end of conveying pipeline is connected with the drawing mechanism discharging opening, and the discharge end of the conveying pipeline is connected with unloader, institute
Meter and the unloader is stated to be electrically connected with controller.
Improved as of the invention further, the unloader include with the cylindrical type cylinder of the conveying pipeline connection and
It is arranged at several arc shaped blades in the cylindrical type cylinder.
As further improvement of the invention, the blowing device includes being arranged on the source of the gas outside the warehouse, described
The gas outlet of source of the gas is connected with outlet pipe, some outlets at the top of the cylinder warehouse of the outlet pipe end connection
Branch pipe, the going out gas branch pipe end is connected with toroidal nozzle, and the different nozzle in some directions is uniformly installed on the toroidal nozzle,
The nozzle is towards the cylinder warehouse inwall and the angle between the ring surface of the toroidal nozzle is 0 °~90 °, two
Angle between adjacent nozzle is 5 °~10 °.
As further improvement of the invention, the dust arrester includes the filtering type with being connected at the top of the cylinder warehouse
Deduster, the filtration dust catcher connecting pipeline, the line end connects diffuser, and the diffuser, which is located at, is arranged on institute
State in the pond outside warehouse, the pipeline is provided with valve.
Improved as of the invention further, the diffuser includes cylinder and be arranged on some of the drum surface engraving
Abortive haul lattice.
As further improvement of the invention, in addition to agitating device, the agitating device includes being arranged on the circular cone
In stirring motor outside warehouse, the rotary shaft insertion circular cone storehouse body sidewall of the stirring motor, the rotary shaft end
Auger impeller is installed, the auger impeller is located at the circular cone warehouse bottom.
As further improvement of the invention, if being interleaved and installed with the Heavenly Stems and Earthly Branches on the both sides side wall of the circular cone warehouse internal upper part
Fagging, the angle of the supporting plate and horizontal direction is 30~60 °.
Beneficial effects of the present invention are：
1st, it is 55~60 ° by setting the angle between two ash buckets, two ash buckets, the angle can cause agstone not
Grey headwall can be glued, the load of two ash buckets is identical, and standby each other, it is ensured that desulphurization system will not be blocked because of a discharging opening
And stopping desulfurization, it is ensured that desulfurizing agent is run steadily in the long term, while being easy to another discharging opening of on-bne repair, and discharging opening is used alternatingly
Also the service life of device is extended, with good stability；
2nd, circular cone warehouse angle is 55~60 °, and the angle causes agstone not glue circular cone warehouse wall；
3rd, some supporting plates being staggered installation of on the both sides side wall of circular cone warehouse internal upper part so that in blanking process, subtract
Small pressure of the agstone to circular cone warehouse, adds the service life of warehouse；
4th, the setting of blowing device, ensure that, improvement storehouse in the mobile performance of powder uniform to the blowing everywhere in storehouse,
So that storehouse Nei Buliu dead angles, it is to avoid agstone prolonged stay dead angle and accumulate hardened arch camber, it is ensured that the storage of agstone
Time, beneficial to storage agstone；
5th, the setting of dust arrester, when warehouse is fed, the agstone of spilling is reached in diffuser through piping, is expanded
It is dissipated in pond, no longer produces airborne dust, does not result in secondary pollution；
6th, the setting of agitating device so that even if there is the lime building stones of caking, before discharging, agitator arm is by the stone of caking
Lime stone stirring is broken, will not block discharging opening, can normally be discharged；
7th, by meter, the agstone amount of output can be estimated, all agstones is exported, it is to avoid go out
Existing blowing is not thorough, causes dust accumulation in storehouse, meanwhile, control discharging output quantity can be measured according to demand, pass through controller pair
The blade opening degree control of unloader, does not result in waste.
Brief description of the drawings
Fig. 1 is a kind of structural representation of limestone powder bin described in the embodiment of the present invention.
In figure,
1st, cylinder warehouse；2nd, circular cone warehouse；3rd, ash bucket；4th, push-pull valve；5th, meter；6th, unloader；8th, arc shaped blade；9、
Source of the gas；10th, outlet pipe；11st, going out gas branch pipe；12nd, toroidal nozzle；13rd, nozzle；14th, pond；15th, filtration dust catcher；16、
Pipeline；17th, diffuser；18th, valve；19th, stirring motor；20th, rotary shaft；21st, auger impeller；22nd, supporting plate.
Embodiment
The present invention is described in further detail below by specific embodiment and with reference to accompanying drawing.The embodiment of the present invention
A kind of described limestone powder bin, including warehouse, drawing mechanism, device for discharging, blowing device, dust arrester.Warehouse includes connecting
Logical cylinder warehouse 1 and circular cone warehouse 2, circular cone warehouse included angle A and B are 55~60 °, and the angle causes agstone not glue
Circular cone warehouse wall.
The present invention sets two drawing mechanisms, and two drawing mechanisms are symmetrically mounted on the bottom of circular cone warehouse 2 and and circular cone
The bottom of warehouse 2 is communicated.Specifically, drawing mechanism includes the ash bucket 3 connected with the bottom of circular cone warehouse 2 and through the side wall of ash bucket 3
Push-pull valve 4.It it is 55~60 ° by setting the angle C between two ash buckets, two ash buckets, the angle can cause agstone not
Grey headwall can be glued.Push-pull valve 4 includes installing roller assembly on travelling carriage, sliding panel, roller assembly and plate motor, travelling carriage,
Sliding panel is arranged on roller assembly, and plate motor driving roller assembly is rotated, and is driven sliding panel to reciprocate, is realized ash bucket 3
The opening and closing of discharging opening.When needing which ash bucket to be discharged, corresponding push-pull valve is opened.Two ash buckets go out
Doses is identical, and standby each other, it is ensured that desulphurization system will not be because a discharging opening is blocked and stops desulfurization, it is ensured that desulfurizing agent is long
Phase stable operation, while being easy to another discharging opening of on-bne repair, the service life for also extending device is used alternatingly in discharging opening,
With good stability.
The present invention sets two devices for discharging standby each other, the discharging opening of two devices for discharging respectively with two drawing mechanisms
Connection.Device for discharging includes the meter 5 being arranged on conveying pipeline, and feeding end and the drawing mechanism discharging opening of conveying pipeline connect
Connect, the discharge end of conveying pipeline is connected with unloader 6, meter 5 and unloader 6 are electrically connected with controller 7.Wherein, unload
Material machine 6 includes the cylindrical type cylinder with conveying pipeline connection and several arc shaped blades 8 being arranged in cylindrical type cylinder.
The lime stone output quantity that above-mentioned unloader 6 is measured according to meter 5 exports to control to export agstone or stopping
Agstone, when needing to convey agstone from limestone powder bin to outside, agstone can be conveyed by opening unloader 6
To outside storehouse, and closing unloader 6 can block agstone to be transported to outside storehouse.When the conveying lime stone from limestone powder bin to outside
During powder, the opening degree of arc shaped blade 8 is adjusted by controller 7, the speed of agstone flowing velocity can be controlled.Work as lime stone
When the output quantity of powder reaches demand soon, the opening degree of arc shaped blade 8 can be turned down so that agstone slowly flows out, will not
Cause to waste, when the agstone amount for needing to convey outward is far from enough, the opening degree of arc shaped blade 8 can be tuned up so that stone
Limestone flour is flowed as quickly out.Meter 5 mainly measures the output quantity of agstone, and the output of agstone can be measured in real time
Amount, the output quantity of the agstone of metering can in real time show or be shown every preset time period.
Blowing device is arranged on the top of cylinder warehouse 1, including is arranged on the source of the gas 9 outside warehouse, the gas outlet of source of the gas 9 with
Outlet pipe 10 is connected, some going out gas branch pipe 11 through the top of cylinder warehouse 1 of the end of outlet pipe 10 connection, going out gas branch pipe 11
End is connected with toroidal nozzle 12, uniformly installs the different nozzle 13 in some directions on toroidal nozzle 12, and nozzle 13 is towards cylinder
The inwall of the warehouse 1 and angle between the ring surface of toroidal nozzle 12 is 0 °~90 °, the angle between two adjacent nozzles 13 is
5 °~10 °, inside the injection silo body that the nozzle of intersecting angle can be more comprehensive.Blowing device ensure that in storehouse everywhere
Blowing is uniform, improves the mobile performance of powder in storehouse so that storehouse Nei Buliu dead angles, it is to avoid agstone prolonged stay dead angle and heap
The hardened arch camber of product, it is ensured that the resting period of agstone, beneficial to storage agstone.
Dust arrester is connected with the top of cylinder warehouse 1, including the filtration dust catcher 15 connected with the top of cylinder warehouse 1,
The connecting pipeline 16 of filtration dust catcher 15, the end of pipeline 16 connection diffuser 17, diffuser 17, which is located at, to be arranged on outside warehouse
In pond 14, pipeline 16 is provided with valve 18.Wherein, diffuser 17 includes cylinder and is arranged on some hollow out nets of drum surface
Lattice, are easy to the diffusion of dust.When warehouse is fed, Open valve 18, the agstone of spilling is reached in diffuser through piping,
It is flooded in pond, no longer produces airborne dust, does not result in secondary pollution.
Further, in addition to agitating device, agitating device includes being arranged on the stirring motor 19 outside circular cone warehouse 2,
In the side wall of the insertion circular cone of rotary shaft 20 warehouse 2 of stirring motor 19, the end of rotary shaft 20 is provided with auger impeller 21, spiral
Agitator arm 21 is located at the bottom of circular cone warehouse 2.Even if so that there is the lime building stones of caking, before discharging, agitator arm will lump
Lime stone stirring it is broken, discharging opening will not be blocked, can normally be discharged.
Further, be interleaved and installed with some supporting plates 22 on the both sides side wall of the internal upper part of circular cone warehouse 2, supporting plate 22 with
The angle of horizontal direction is 30~60 ° so that in blanking process, reduces pressure of the agstone to circular cone warehouse, increase
The service life of warehouse.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of limestone powder bin, it is characterised in that including：
Warehouse, it includes the cylinder warehouse (1) and circular cone warehouse (2) of connection；
Drawing mechanism, it is arranged on circular cone warehouse (2) bottom and communicated with circular cone warehouse (2) bottom, described in two
Drawing mechanism is symmetrically mounted on circular cone warehouse (2) bottom；
Device for discharging, it is connected with the discharging opening of the drawing mechanism, two devices for discharging respectively with two dischargings
The discharging opening connection of device；
Blowing device, it at the top of the cylinder warehouse (1) with connecting；
Dust arrester, it at the top of the cylinder warehouse (1) with connecting.
2. limestone powder bin according to claim 1, it is characterised in that the drawing mechanism includes and the circular cone warehouse
(2) folder between the ash bucket (3) and the push-pull valve (4) through the ash bucket (3) side wall of bottom connection, two ash buckets (3)
Angle C is 55 °~60 °.
3. limestone powder bin according to claim 2, it is characterised in that the push-pull valve (4) includes travelling carriage, slided
The roller assembly is installed, the sliding panel is arranged on the set of rollers on plate, roller assembly and plate motor, the travelling carriage
On part, the plate motor drives the roller assembly to rotate, and drives the sliding panel to reciprocate, realizes the ash bucket (3)
The opening and closing of discharging opening.
4. limestone powder bin according to claim 1, it is characterised in that the device for discharging includes being arranged on conveying pipeline
On meter (5), the feeding end of the conveying pipeline is connected with the drawing mechanism discharging opening, the discharging of the conveying pipeline
End is connected with unloader (6), and the meter (5) and the unloader (6) are electrically connected with controller (7).
5. limestone powder bin according to claim 4, it is characterised in that the unloader (6) includes and the conveying pipeline
The cylindrical type cylinder of road connection and several arc shaped blades (8) being arranged in the cylindrical type cylinder.
6. limestone powder bin according to claim 1, it is characterised in that the blowing device includes being arranged on the warehouse
Outside source of the gas (9), the gas outlet of the source of the gas (9) is connected with outlet pipe (10), outlet pipe (10) the end connection
Some going out gas branch pipe (11) at the top of the cylinder warehouse (1), going out gas branch pipe (11) end and toroidal nozzle (12)
Connection, uniformly installs the different nozzle in some directions (13) on the toroidal nozzle (12), and the nozzle (13) is towards the circle
Post warehouse (1) the inwall and angle between the ring surface of the toroidal nozzle (12) is 0 °~90 °, two adjacent nozzles (13)
Between angle be 5 °~10 °.
7. limestone powder bin according to claim 1, it is characterised in that the dust arrester includes and the cylinder warehouse
(1) filtration dust catcher (15) of top connection, filtration dust catcher (15) connecting pipeline (16), pipeline (16) end
End connection diffuser (17), the diffuser (17) is located in the pond (14) being arranged on outside the warehouse, the pipeline
(16) it is provided with valve (18).
8. limestone powder bin according to claim 7, it is characterised in that the diffuser (17) includes cylinder and is arranged on
Some hollow out grids of the drum surface.
9. limestone powder bin according to claim 1, it is characterised in that also including agitating device, the agitating device bag
Include and be arranged on the outside stirring motor (19) of the circular cone warehouse (2), rotary shaft (20) the insertion institute of the stirring motor (19)
State in the wall of circular cone warehouse (2) side, rotary shaft (20) end is provided with auger impeller (21), the auger impeller
(21) it is located at circular cone warehouse (2) bottom.
10. limestone powder bin according to claim 1, it is characterised in that the both sides side of circular cone warehouse (2) internal upper part
Some supporting plates (22) are interleaved and installed with wall, the supporting plate (22) and the angle of horizontal direction are 30~60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521003.3A CN107140333A (en) | 2017-06-30 | 2017-06-30 | A kind of limestone powder bin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521003.3A CN107140333A (en) | 2017-06-30 | 2017-06-30 | A kind of limestone powder bin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107140333A true CN107140333A (en) | 2017-09-08 |
Family
ID=59785014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710521003.3A Pending CN107140333A (en) | 2017-06-30 | 2017-06-30 | A kind of limestone powder bin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107140333A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107758349A (en) * | 2017-10-26 | 2018-03-06 | 中冶北方（大连）工程技术有限公司 | Integrated form tailings conveying device |
| CN110790040A (en) * | 2019-11-12 | 2020-02-14 | 攀枝花钢城集团有限公司 | Wheel type feeder for granular material |
| CN113184568A (en) * | 2021-04-25 | 2021-07-30 | 黑龙江省镈浩石墨有限责任公司 | Anti-suspension device for high-purity graphite carbon material bin and using method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107758349A (en) * | 2017-10-26 | 2018-03-06 | 中冶北方（大连）工程技术有限公司 | Integrated form tailings conveying device |
| CN107758349B (en) * | 2017-10-26 | 2023-08-08 | 中冶北方（大连）工程技术有限公司 | Integrated tailing conveying device |
| CN110790040A (en) * | 2019-11-12 | 2020-02-14 | 攀枝花钢城集团有限公司 | Wheel type feeder for granular material |
| CN113184568A (en) * | 2021-04-25 | 2021-07-30 | 黑龙江省镈浩石墨有限责任公司 | Anti-suspension device for high-purity graphite carbon material bin and using method |
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Application publication date: 20170908 |