CN108654816A - A kind of polysilicon rod crushing system and breaking method - Google Patents
A kind of polysilicon rod crushing system and breaking method Download PDFInfo
- Publication number
- CN108654816A CN108654816A CN201810421097.1A CN201810421097A CN108654816A CN 108654816 A CN108654816 A CN 108654816A CN 201810421097 A CN201810421097 A CN 201810421097A CN 108654816 A CN108654816 A CN 108654816A
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- Prior art keywords
- bar
- block
- polysilicon rod
- polysilicon
- sorter
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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
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
-
- 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
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
- Silicon Compounds (AREA)
- Crushing And Grinding (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The present invention relates to field of polysilicon production, and in particular to a kind of polysilicon rod crushing system and breaking method.Polysilicon rod crushing system provided by the invention, polysilicon rod are pre-processed, and are detached bar and block by screening plant, and block enters first and differentiates sorter, and is distinguished according to the variety classes of block；Bar enter second differentiate sorter, distinguished according to the variety classes of bar, into the different bar collection devices of bar processing unit, user need bar when, be passed through in bar packing device and packed；When user needs block, it is passed through in breaker and is crushed.Polysilicon rod crushing system provided by the invention saves operating personnel's operating time, avoids the pollution introduced by manual operation, improves efficiency, saves cost.Polysilicon rod breaking method provided by the invention, including above-mentioned polysilicon rod crushing system, therefore also there is above-mentioned advantageous effect.
Description
Technical field
The present invention relates to field of polysilicon production, and in particular to a kind of polysilicon rod crushing system and breaking method.
Background technology
Polysilicon be produce monocrystalline silicon direct material, be contemporary artificial intelligence, automatically control, information processing, photoelectricity turn
The electronics and information infrastructure material of equal semiconductor devices is changed, polysilicon purity is higher, and Electronic Performance is better, and corresponding photoelectric conversion rate carries
It is high.
Polysilicon is the basic material for producing solar cell, semiconductor original paper.On solar energy level silicon material market, change
Good Siemens Method is current mainstream technology, accounts for about the 80% of the global polysilicon market share.In recent years, domestic polysilicon enterprise
A large amount of innovations are done in terms of technological development so that cost and quality are continuously improved, and gradually catch up with the technology of external mainstream vendor
Level, but pollution-free, contactless be crushed of polysilicon is still a difficult point.
Traditional polycrystalline silicon rod crumbling method needs to consume largely artificial and muscle power and carries out broken polysilicon, of high cost, effect
Rate is low, and the cross contaminations such as the sweat stain generated when tapping broken that consume one's strength be easy to cause silicon material surface contamination, influence product quality；
Polysilicon is tapped repeatedly simultaneously and be easy to cause polysilicon surface metal and increases, Wc-Co alloys, which are hammered into shape, remains in silicon material surface table
Metal increases, and the monocrystalline minority carrier life time of preparation reduces, and influences service life and the photoelectric conversion efficiency of downstream solar energy.
Invention content
To solve the above problem in the prior art, the purpose of the present invention is to provide a kind of broken systems of polysilicon rod
System.
Another object of the present invention is to provide a kind of breaking polycrystalline silicon sides using above-mentioned polysilicon rod crushing system
Method.
What the embodiment of the present invention was realized in：
A kind of polysilicon rod crushing system comprising for being tentatively crushed the precrushing device of polysilicon rod, being used for
Preliminary broken polysilicon rod is divided into the screening plant of bar and the first block, for distinguishing simultaneously the first block
The first of classification differentiates that sorter, second for distinguishing and classifying bar differentiate sorter, bar processing unit, institute
State bar processing unit include at least four bar collection devices, the bar collection device be connected with bar packing device and
Breaker；Wherein, the precrushing device is connect with the screening plant by first passage；The screening plant with it is described
First discriminating sorter is connected by second channel；The screening plant differentiates that sorter is logical by third with described second
Road connects；The bar collection device is connect with the second discriminating sorter by fourth lane；The bar packaging dress
It sets and is connect by Five-channel with the bar collection device, the breaker is logical by the 6th with the bar collection device
Road connects.
In one embodiment of the invention：
Precrushing device described above is set as bar of the cutter device for polysilicon rod to be cut into section shape.
In one embodiment of the invention：
Polysilicon rod crushing system described above further includes wind shower device, and the wind shower device is arranged in the precrushing
Between device and the precrushing device.
In one embodiment of the invention：
Wind shower device described above is the Airshower chamber being arranged on the first passage.
In one embodiment of the invention：
Screening plant described above is set as vibrating screen subnetting.
In one embodiment of the invention：
First discriminating sorter described above includes for differentiating that the first of different types of polysilicon block differentiates dress
It sets and the first sorter for different types of polysilicon block to be distinguished to processing；Described second differentiates classification dress
Set including for differentiating different types of polysilicon bar the second identification device and for by different types of polycrystalline silicon rod
Material distinguishes the second sorter of processing.
In one embodiment of the invention：
Polysilicon rod crushing system described above further includes block processing unit, and the block processing unit includes at least
Four block collection devices and the first block packing device, the block collection device are connected to first sorter, institute
The first block packing device is stated to connect with the block collection device.
In one embodiment of the invention：
Breaker described above includes sequentially connected crushing members, removes sundries, crosses magnetic part and screening part.
In one embodiment of the invention：
Polysilicon rod crushing system described above further includes the second block packing device, the second block packing device
The package being connect including weighing piece and with the weighing piece, the weighing piece include weighing unit and are set to the weighing unit
Packaging bag, the second block packing device includes closing device.
A kind of polysilicon rod breaking method uses any one of the above polysilicon rod crushing system, including：
Polysilicon rod is placed in the precrushing device and carries out precrushing by precrushing；
Preliminary broken polysilicon rod is divided into bar and the first block by screening by the screening plant；
First classification differentiates that the first block is differentiated and classified by sorter by described first；
Second classification differentiates that bar is differentiated and classified by sorter by described second；
Bar processing, bar by the bar processing unit packed or be crushed.
The advantageous effect of the embodiment of the present invention is：
The polysilicon rod crushing system provided in the embodiment of the present invention, including precrushing device, screening plant, first
Differentiate that sorter, second differentiate that sorter, bar processing unit, the bar processing unit are received including at least four bars
Acquisition means, the bar collection device are connected with bar packing device and breaker.In use, by polycrystalline silicon
Stick is pre-processed by precrushing device, and polysilicon rod is broken for bar and is mingled in the block of bar device, is led to
Screening plant is crossed to detach bar and block, wherein block by second channel enter first differentiate sorter, first
Screening plant is distinguished according to the variety classes of block, such as (cauliflower material, branches and tendrils material, fine and close material and abnormal material)；Bar
Enter second by third channel and differentiate sorter, the second screening plant is according to the variety classes of bar, such as (cauliflower material, branch
Climing material, fine and close material and abnormal material) it is distinguished, and difference according to type respectively enters the difference of bar processing unit
Bar collection device in, bar can be then passed through in different devices according to the different demands of user, when user need
Bar when, then open Five-channel bar be passed through in bar packing device and pack；When user needs block, then beat
It opens the 6th channel bar is passed through in breaker and be crushed.Polysilicon rod crushing system provided by the invention, it is entire to flow
Journey only needs operating personnel to assist completing, and saves the time of operating personnel's intermediary operation process, avoids because manual operation is introduced
Pollution, improve efficiency, save cost, realize that green manufacturing and intelligence manufacture are laid a good foundation for enterprise.
Polysilicon rod breaking method provided by the invention, including above-mentioned polysilicon rod crushing system, therefore also have
There is above-mentioned advantageous effect.
Description of the drawings
For the clearer technical solution for illustrating the embodiment of the present invention, below to needing attached drawing to be used to make in embodiment
It is simple to introduce.It should be appreciated that the following drawings illustrates only the certain embodiments of the present invention, it is not construed as to model of the present invention
The limitation enclosed.To those skilled in the art, without creative efforts, it can obtain according to these attached drawings
Obtain other accompanying drawings.
Fig. 1 is the overall structure diagram for the polysilicon rod crushing system that the embodiment of the present invention 1 provides.
Icon：10- polysilicon rod crushing systems；100- precrushing devices；110- first passages；120- wind shower devices；
130- mechanical arms；200- screening plants；300- first differentiates sorter；310- second channels；320- block processing units；
322- block collection devices；324- the first block packing devices；400- second differentiates sorter；410- third channels；500-
Bar processing unit；510- bar collection devices；512- fourth lanes；520- bar packing devices；522- Five-channels；530-
Breaker；The 6th channels 532-；533- crushing members；534- removes sundries；535- crosses magnetic part；536- sieves part；Second piece of 540-
Expect packing device.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work belongs to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the embodiment of the present invention, it should be noted that if term "center" occur, "upper", "lower", " erecting
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description,
It does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and operation, because
This is not considered as limiting the invention.If being only used in addition, occurring term " first ", " second " etc. in description of the invention
Description is distinguished, relative importance is not understood to indicate or imply.
If being not offered as requiring component absolute in addition, occurring the terms such as term "horizontal", "vertical" in description of the invention
Horizontal or pendency, but can be slightly tilted.If "horizontal" refers to only that its direction is more horizontal with respect to for "vertical", not
It is to indicate that the structure is had to fully horizontally, but can be slightly tilted.
In the description of the embodiment of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, if occurring
Term " setting ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
Embodiment 1：
Fig. 1 is please referred to, the present embodiment provides a kind of polysilicon rod crushing systems 10 comprising for tentatively broken polycrystalline
The precrushing device 100 of silicon silicon rod；Screening for preliminary broken polysilicon rod to be divided into bar and the first block fills
Set 200；First for distinguishing and classifying the first block differentiates sorter 300；For distinguishing and classifying bar
Second differentiate sorter 400；Bar processing unit 500, the bar processing unit 500 are collected including at least four bars
Device 510, the bar collection device 510 are connected with bar packing device 520 and breaker 530；Wherein, described pre-
Breaker 100 is connect with the screening plant 200 by first passage 110；The screening plant 200 differentiates with described first
Sorter 300 is connected by second channel 310；The screening plant 200 differentiates sorter 400 by the with described second
Triple channel 410 connects；The bar collection device 510 is connected with the second discriminating sorter 400 by fourth lane 512
It connects；The bar packing device 520 is connect with the bar collection device 510 by Five-channel 522, the breaker
530 are connect with the bar collection device 510 by the 6th channel 532.
Specifically, in the present embodiment, the bar processing unit 500 includes four bar collection devices 510, specially
Collect cauliflower material, branches and tendrils material, fine and close material and abnormal material (pollution material etc.).Abnormal material will be wherein collected into and carry out after-treatment.
In the present embodiment, the precrushing device 100 is set as cutter device for polysilicon rod to be cut into section
The bar of shape.It should be noted that not being defined here to the concrete structure of precrushing device 100, it is possible to understand that, at it
In his specific embodiment, precrushing device 100 can also be set to other structures according to the demand of user, for example, by using striking
Hammer etc..
In the present embodiment, the polysilicon rod crushing system 10 further includes wind shower device 120, the wind shower device
120 are arranged between the precrushing device 100 and the precrushing device 100.Wind shower device 120 is set by polycrystalline silicon rod table
The micronic dust purging in face is clean.
In the present embodiment, the wind shower device 120 is the Airshower chamber being arranged on the first passage 110.Specifically,
In the present embodiment, it is additionally provided with dust exhaust apparatus (not shown) in Airshower chamber, setting dust exhaust apparatus is used for Airshower chamber
The micronic dust grown be adsorbed to being appointed as at position.
In the present embodiment, the screening plant 200 is set as vibrating screen subnetting.Screening plant 200 is set as vibrating
Preliminary broken polysilicon rod effectively can be divided into bar and the first block by Screening Network.
Specifically, in the present embodiment, described first differentiates that sorter 300 includes for differentiating different types of polycrystalline
First identification device of silico briquette material and the first sorter for different types of polysilicon block to be distinguished to processing
(not shown)；The second discriminating sorter 400 includes the second mirror for differentiating different types of polysilicon bar
Other device and the second sorter (not shown) for different types of polysilicon bar to be distinguished to processing.
In the present embodiment, the polysilicon rod crushing system 10 further includes block processing unit 320, the block
Processing unit 320 includes at least four block collection devices 322 and the first block packing device 324, the block collection device
322 are connected to first sorter, and the first block packing device 324 is connect with the block collection device 322.If
Block processing unit 320 is set, convenient for being classified and being packed block.It should be noted that in the present embodiment, the first block
Packing device 324 includes the first block weighing piece (not shown), packaging bag (not shown) and the envelope for encapsulation
Mouth part (not shown), when carrying out the first block packaging, when the weight of the first block in packaging bag reaches preset value, envelope
Packaging bag equipped with the first block is packaged by mouth part.
Specifically, in the present embodiment, the block processing unit 320 includes four block collection devices 322, specially
Collect cauliflower material, branches and tendrils material, fine and close material and abnormal material (pollution material etc.).Abnormal material will be wherein collected into and carry out after-treatment.
In the present embodiment, the breaker 530 includes sequentially connected crushing members 533, removes sundries 534, crosses magnetic part
535 and screening part 536.In carrying out shattering process, polysilicon rod is crushed by crushing members 533, by removal of impurities
Part 534, which cleaned, passed through magnetic part 535 is removed the metal being mixed in polysilicon block, passes through into screening part 536
Different granular sizes distinguish, and processing of classifying.Specifically, in the present embodiment, crushing members 533 are set as tapping hammer,
Except sundries 534 and 535 use of magnetic part excessively are in the prior art, it is not unfolded to be described in detail herein.It sieves part 536 and uses net
The screening screen frame that hole is changed from small to big is made, and the polysilicon block of different granular sizes is distinguished processing.
Specifically, in the present embodiment, the polysilicon rod crushing system 10 further includes the second block packing device
540, the second block packing device 540 includes weighing piece (not shown) and the package being connect with the weighing piece
(not shown), the weighing piece include weighing unit (not shown) and are set to the packaging bag weighed and (do not show in figure
Go out), the second block packing device 540 includes closing device.When carrying out the second block packaging, when second piece in packaging bag
When the weight of material reaches preset value, the packaging bag equipped with the second block is packaged by closing device.
Specifically, in the present embodiment, polysilicon rod is placed in precrushing device 100 by mechanical arm 130.
The polysilicon rod crushing system 10 provided in the embodiment of the present invention, including precrushing device 100, screening dress
It sets the 200, first discriminating sorter 300, second and differentiates sorter 400, bar processing unit 500, the bar processing dress
Set 500 include at least four bar collection devices 510, the bar collection device 510 be connected with bar packing device 520 and
Breaker 530.In use, polysilicon rod is pre-processed by precrushing device 100, by polysilicon rod
It is broken for bar and is mingled in the block of bar device, detached bar and block by screening plant 200, wherein
Block by second channel 310 enter first differentiate sorter 300, the first screening plant 200 according to block variety classes,
As (cauliflower material, branches and tendrils material, fine and close material and abnormal material) is distinguished；Bar enters second by third channel 410 and differentiates
Sorter 400, the second screening plant 200 is according to the variety classes of bar, and such as (cauliflower material, branches and tendrils are expected, densification is expected and abnormal
Material) it is distinguished, and difference according to type respectively enters the different bar collection devices of bar processing unit 500
In 510, bar can be then passed through in different devices according to the different demands of user, when the bar that user needs, then
It opens Five-channel 522 bar is passed through in bar packing device 520 and pack；When user needs block, then is opened
Bar is passed through in breaker 530 by six channels 532 to be crushed.Polysilicon rod crushing system 10 provided by the invention, it is whole
A flow only needs operating personnel to assist completing, and saves the time of operating personnel's intermediary operation process, avoids because of manual operation
The pollution of introduction improves efficiency, saves cost, realizes that green manufacturing and intelligence manufacture are laid a good foundation for enterprise.
Embodiment 2：
The present embodiment provides a kind of polysilicon rod breaking method, the polysilicon rod breaking method uses any one
Above-mentioned polysilicon rod crushing system 10, including：
Polysilicon rod is placed in the precrushing device 100 and carries out precrushing by precrushing；
Preliminary broken polysilicon rod is divided into bar and the first block by screening by the screening plant 200；
First classification differentiates that the first block is differentiated and classified by sorter 300 by described first；
Second classification differentiates that bar is differentiated and classified by sorter 400 by described second；
Bar processing, bar by the bar processing unit 500 packed or be crushed.
Polysilicon rod breaking method provided by the invention, including above-mentioned polysilicon rod crushing system 10, therefore
With above-mentioned advantageous effect.
Obviously, the above embodiment of the present invention is just for the sake of clearly illustrating examples made by the present invention, and it is pair to be not
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (10)
1. a kind of polysilicon rod crushing system, which is characterized in that including：
Precrushing device for being tentatively crushed polysilicon rod；
For preliminary broken polysilicon rod to be divided into bar and the screening plant of the first block；
First for distinguishing and classifying the first block differentiates sorter；
Second for distinguishing and classifying bar differentiates sorter；
Bar processing unit, the bar processing unit include at least four bar collection devices, and the bar collection device connects
It is connected to bar packing device and breaker；
Wherein, the precrushing device is connect with the screening plant by first passage；The screening plant and described first
Differentiate that sorter is connected by second channel；The screening plant is connected with the second discriminating sorter by third channel
It connects；The bar collection device is connect with the second discriminating sorter by fourth lane；The bar packing device with
The bar collection device is connected by Five-channel, and the breaker is connected with the bar collection device by the 6th channel
It connects.
2. polysilicon rod crushing system according to claim 1, which is characterized in that the precrushing device is set as cutting
Cut bar of the device for polysilicon rod to be cut into section shape.
3. polysilicon rod crushing system according to claim 1, which is characterized in that the polysilicon rod crushing system
Further include wind shower device, the wind shower device is arranged between the precrushing device and the precrushing device.
4. polysilicon rod crushing system according to claim 3, which is characterized in that the wind shower device is setting in institute
State the Airshower chamber on first passage.
5. polysilicon rod crushing system according to claim 1, which is characterized in that the screening plant is set as vibrating
Screening Network.
6. polysilicon rod crushing system according to claim 1, which is characterized in that described first differentiates sorter packet
Include the first identification device for differentiating different types of polysilicon block and for by different types of polysilicon block into
Row distinguishes the first sorter of processing；
The second discriminating sorter includes the second identification device and use for differentiating different types of polysilicon bar
In the second sorter that different types of polysilicon bar is distinguished to processing.
7. polysilicon rod crushing system according to claim 6, which is characterized in that the polysilicon rod crushing system
Further include block processing unit, the block processing unit includes at least four block collection devices and the first block packaging dress
It sets, the block collection device is connected to first sorter, and the first block packing device is collected with the block
Device connects.
8. polysilicon rod crushing system according to claim 1, which is characterized in that the breaker includes connecting successively
The crushing members that connect, except sundries, cross magnetic part and screening part.
9. polysilicon rod crushing system according to claim 1, which is characterized in that the polysilicon rod crushing system
Further include the second block packing device, the second block packing device includes weighing piece and the packaging that is connect with the weighing piece
Part, the weighing piece include weighing unit and the packaging bag for being set to the weighing unit, and the second block packing device includes envelope
Mouth device.
10. a kind of polysilicon rod breaking method, which is characterized in that the polysilicon rod breaking method uses claim 1
To the polysilicon rod crushing system described in 9 any one, including：
Polysilicon rod is placed in the precrushing device and carries out precrushing by precrushing；
Preliminary broken polysilicon rod is divided into bar and the first block by screening by the screening plant；
First classification differentiates that the first block is differentiated and classified by sorter by described first；
Second classification differentiates that bar is differentiated and classified by sorter by described second；
Bar processing, bar by the bar processing unit packed or be crushed.
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| CN201810421097.1A CN108654816B (en) | 2018-05-04 | 2018-05-04 | A kind of polysilicon rod crushing system and breaking method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110304633A (en) * | 2019-07-17 | 2019-10-08 | 亚洲硅业（青海）有限公司 | A kind of reduction furnace silicon rod discharging device |
| CN110882799A (en) * | 2019-12-05 | 2020-03-17 | 亚洲硅业(青海)股份有限公司 | Clean broken packaging system of silicon material |
| CN111545327A (en) * | 2020-05-19 | 2020-08-18 | 张军红 | Ore processing device |
| WO2022095322A1 (en) * | 2020-11-05 | 2022-05-12 | 中国恩菲工程技术有限公司 | Polycrystalline silicon crushing, sorting and packaging system |
| CN114875486A (en) * | 2022-04-24 | 2022-08-09 | 新疆大全新能源股份有限公司 | Post-treatment process of polycrystalline silicon |
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