CN111659488A - Polycrystalline silicon extrusion crushing device and method - Google Patents
Polycrystalline silicon extrusion crushing device and method Download PDFInfo
- Publication number
- CN111659488A CN111659488A CN201910163207.3A CN201910163207A CN111659488A CN 111659488 A CN111659488 A CN 111659488A CN 201910163207 A CN201910163207 A CN 201910163207A CN 111659488 A CN111659488 A CN 111659488A
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- sliding block
- crushing
- teeth
- rod
- alloy
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001125 extrusion Methods 0.000 title claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 29
- 239000000956 alloy Substances 0.000 claims abstract description 29
- 229920005591 polysilicon Polymers 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002210 silicon-based material Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052710 silicon Inorganic materials 0.000 abstract description 13
- 239000010703 silicon Substances 0.000 abstract description 13
- 238000012216 screening Methods 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract description 2
- 238000007873 sieving Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a device and a method capable of realizing direct extrusion crushing of a polysilicon rod, wherein the device consists of a host, a hydraulic system and an electric operation box; the main machine comprises a main frame, a hydraulic cylinder arranged at the front end of the main frame, a piston rod arranged in the hydraulic cylinder, a sliding block connected with the piston rod, a metal die with prismatic teeth connected with one side of the movable sliding block, a fixed end and a sieve rod; the electric operation box and the hydraulic system control the slide block to operate and extrude the silicon rod to complete crushing, the crushed small-size silicon blocks enter the screening machine to be screened and packaged, and the large-size silicon blocks are secondarily crushed. The tungsten-cobalt hard alloy die and the prism teeth have the advantages that the structure is simple, the efficiency is high, the contact area between the silicon block and the alloy die is reduced due to the design of the tungsten-cobalt hard alloy die and the prism teeth, so that the introduction of impurities is reduced, and the problems of high impurity introduction and high fine powder generation in the traditional mechanical crushing are solved.
Description
Technical Field
The invention relates to the technical field of polycrystalline silicon preparation, in particular to a polycrystalline silicon crushing device and method.
Background
With the development of the photovoltaic industry in China, the capacity of polycrystalline silicon is continuously increased, 50 million tons of polycrystalline silicon is broken through in 2018, and the mainstream polycrystalline silicon production method is an improved Siemens method, so that the produced polycrystalline silicon is in a round rod shape, the hardness of the polycrystalline silicon is high, and the requirement on quality is strict, so that the polycrystalline silicon crushing technology is a difficult problem in the industry all the time. At present, the mainstream polysilicon crushing technology in China is manual hammer knocking crushing, mechanical crushing and temperature difference crushing are adopted, and the silicon rod crushing modes are uniform and have a certain defect.
The manual crushing mode needs a large amount of labor, the crushed silicon powder affects the health of a human body, and the crushing of small-particle silicon blocks cannot be completed; the crushing mode of the mechanical double-roller type crushing device is simple and efficient, but the selected alloy roller can be continuously consumed to pollute the silicon material; the method needs to consume huge heat source and cold source, and the automatic crushing is only automatic cracking, and secondary crushing is needed to obtain normal size.
Patent CN 108686754A discloses a mechanical crushing device, utilizes a pair of motor to drive a pair of roller teeth and moves in opposite directions, carries out the interlock breakage to silicon material, and the roller tooth adopts carbide, and this mechanical crushing equipment is simple, crushing efficiency is high but has the requirement to the pan feeding size, can produce a large amount of farine moreover, and silicon material loss is serious.
Patent CN 102489372A discloses a temperature difference crushing method, which uses microwave as a heat source to heat a polysilicon rod to 400-1100 ℃, and then the polysilicon rod enters a quenching cooling chamber to obtain an instant stress to realize automatic crushing.
Patent CN 205361598U discloses a broken system of high-pressure pulse formula polycrystalline silicon rod, puts into the broken container that is equipped with deionized water silicon rod, then produces high-pressure pulse through impulse generator, breaks the silicon rod in the container, then gets into the shale shaker and selects the platform and finally gets into drying system, and this method has realized the automatic breakage and the screening of silicon rod, but equipment is expensive and crushing inefficiency, and the material of the pulse electrode who uses is the carbon steel, can produce the pollution to the silicon material.
Disclosure of Invention
In order to solve the problems, the invention discloses a polysilicon material crushing device and method, wherein a hydraulic device is used for driving a sliding block and a die to extrude and crush a silicon rod.
Based on the invention, the device and the method for extruding and crushing the polycrystalline silicon comprise a host machine, an electric operation box and a hydraulic system, and are characterized in that the host machine comprises a main frame, a hydraulic cylinder arranged at the front end of the main frame, a piston rod arranged on the hydraulic cylinder, a sliding block connected with the piston rod, a metal die with prismatic teeth arranged on one side of the movable sliding block, a fixed end and a sieve rod.
The polycrystalline silicon extrusion crushing device and the method are characterized in that the alloy die comprises prismatic teeth, and the alloy die is made of tungsten-cobalt hard alloy.
The device and the method for extruding and crushing the polycrystalline silicon are characterized in that the outer part of the alloy die is a cuboid, one side combined with the sliding block is provided with a groove, the alloy die can be conveniently sleeved on the sliding block, the side surface of the alloy die is not provided with prismatic teeth, and the alloy die is fixed on the sliding block through metal screws.
The polycrystalline silicon extrusion crushing device and the method are characterized in that the prism teeth are uniformly distributed at the front end of the alloy die, the number of the prism teeth is 1-25/square decimeter, and preferably 10-20/square decimeter; the front end of the prism teeth is spherical, wherein the prism teeth and the mould are of an integral structure or a combined structure, but the integral structure is preferred.
The polycrystalline silicon extrusion crushing device and the method are characterized in that the sieve rod is arranged on a bracket at the lower part of the sliding block and is not contacted with the sliding block, the sieve rod is made of stainless steel or carbon steel, and polyurethane is poured outside; the spacing between the sieve rods is 30-120mm, preferably 40-90 mm; the number of screen bars is between 2 and 15, preferably between 3 and 10.
The device and the method for extruding and crushing the polycrystalline silicon are characterized in that the running speed of the sliding block during primary extrusion crushing can be controlled to be 20-80mm/s, the running speed of the sliding block during secondary extrusion crushing can be controlled to be 20-50mm/s, and the running speed of the sliding block during return stroke can be controlled to be 50-120 mm/s.
The polycrystalline silicon extrusion crushing device and the method are characterized in that the silicon material after extrusion crushing has a width smaller than the distance between the sieve rods, can leak the sieve rods and enter a screening process, and the silicon material with a width larger than the distance between the sieve rods can be subjected to secondary extrusion crushing.
The device and the method for extruding and crushing the polycrystalline silicon are characterized in that one side of the fixed end, which corresponds to the sliding block, is an alloy die with prismatic teeth.
According to the polycrystalline silicon squeezing and crushing device and method, the hydraulic system comprises the electro-hydraulic proportional overflow speed regulating valve, the electro-hydraulic reversing valve and the one-way valve, and the current of the electro-hydraulic proportional speed regulating valve can be regulated as required to control the running speed of the sliding block, so that variable-speed squeezing is realized.
The polycrystalline silicon extrusion crushing device and the method are characterized in that the running speed of the sliding block is controlled to be 20-80mm/s, preferably 30-60mm/s when the sliding block is pressed for one time; the running speed is controlled to be 20-50mm/s, preferably 30-40mm/s during the secondary pressing; the running speed during the return stroke is controlled to be 50-120mm/s, preferably 60-100 mm/s.
The polycrystalline silicon extrusion crushing device and the method are characterized in that the silicon material after extrusion crushing has a width smaller than the distance between the sieve rods, can leak the sieve rods and enter a screening process, and the silicon material with a width larger than the distance between the sieve rods can be subjected to secondary extrusion crushing.
Compared with the prior art, the method has the advantages that the polycrystalline silicon rod is directly crushed, the crushing cost is low, and the efficiency is high; the size of the crushed silicon material can be adjusted according to the speed of the slide block; the design of the tungsten-cobalt-containing hard alloy prismatic tooth has the advantages of reducing the contact area and reducing the introduction of impurities and the generation of silicon fine powder during crushing.
Drawings
Fig. 1 is a schematic structural diagram of a crushing device according to the present invention.
The device comprises a main frame 1, an electric operation box 2, a hydraulic system 3, a hydraulic cylinder 4, a piston rod 5, a metal screw 6, a sliding block 7, an alloy die 8, a prism tooth 9, a sieve rod 10, a fixed end 11, a sieve rod 12, a sieve rod 13 and a metal screw 14.
FIG. 2 is a top view of a slide and alloy die assembly in accordance with the present invention.
FIG. 3 is a side view of the slider and alloy die assembly in accordance with the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments based on the embodiments of the present invention, which can be made by those skilled in the art without inventive changes, belong to the protection scope of the present invention.
Fig. 1 shows an embodiment of the invention, and the polysilicon crushing device comprises a main machine, an electric operation box 2 and a hydraulic system 3, wherein the main machine comprises a main machine frame 1, a hydraulic cylinder 4, a piston rod 5, a metal screw 6, a slide block 7, an alloy die 8, prismatic teeth 9, a sieve rod 10, a fixed end 11, a sieve rod 12, a sieve rod 13 and a metal screw 14; the piston rod 5 and the sliding block 7 are fixed through a metal screw 6, and the sliding block 7 and the alloy die 8 are fixed through a metal screw 14.
A polycrystalline silicon rod is placed between a sliding block 7 and a fixed end 11 of the device through an automatic feeding system, a piston rod 5 in a hydraulic cylinder 4 is pushed to drive the sliding block 7 to move forward or backward under the control of an electric control box 2 and a hydraulic system 3, and polycrystalline silicon is extruded and crushed by prism teeth between the movable sliding block 7 and the fixed end 11; the operation speed of the sliding block is controlled through a set program, the silicon material with the width smaller than the width L of the sieve rod directly falls through the gaps among the sieve rod 10, the sieve rod 12 and the sieve rod 13 and enters the linear sieving machine for sieving and packaging, the silicon material with the width larger than the width L of the sieve rod is crushed by secondary extrusion, the silicon rod is continuously put into the linear sieving machine after the secondary crushing for repeating the operation, after the primary crushing, the silicon blocks staying on the upper parts of the sieve rod 10, the sieve rod 12 and the sieve rod 13 account for 10-20% of the mass before the crushing, and after the secondary crushing, all the polysilicon is crushed and falls into the linear sieving machine for sieving.
In the embodiment, the number of the prism teeth uniformly distributed at the front end of the die is 10/square decimeter, the running speed of the slide block during primary pressing is 40mm/s, the running speed of the slide block during secondary pressing is 30mm/s, and the running speed of the slide block during return stroke is 60 mm/s. The distance L =40mm between the screen bars 10, 12, 13.
Although particular embodiments of the invention have been described and illustrated in detail with reference to the accompanying drawings, it is to be understood that equivalent alterations and modifications can be effected therein by those skilled in the art, which would still achieve the intended functional result, without departing from the spirit and scope of the invention.
Claims (9)
1. The device and the method for extruding and crushing the polycrystalline silicon comprise a host machine, an electric operation box and a hydraulic system, and are characterized in that the host machine comprises a main frame, a hydraulic cylinder arranged at the front end of the main frame, a piston rod arranged on the hydraulic cylinder, a sliding block connected with the piston rod, a metal die with prismatic teeth arranged on one side of the movable sliding block, a fixed end and a sieve rod.
2. The polysilicon crushing apparatus and method according to claim 1, wherein: the alloy die contains prismatic teeth.
3. The polysilicon crushing apparatus and method according to claim 1, wherein: the alloy mold is made of tungsten-cobalt hard alloy.
4. The polysilicon crushing apparatus and method according to claim 2, wherein: the alloy mould is cuboid and sleeved on the sliding block, the side surface of the alloy mould is not provided with prismatic teeth, and the alloy mould is fixed on the sliding block through a metal screw.
5. The polysilicon crushing apparatus and method according to claim 2, wherein: the prism teeth and the alloy die are of an integral structure, the prism teeth are uniformly distributed at the front end of the alloy die, the front end of each prism tooth is spherical, and the number of the prism teeth is 1-25 per square decimeter.
6. The polysilicon crushing apparatus and method according to claim 1, wherein: the sieve rods are arranged on the bracket at the lower part of the sliding block and are not contacted with the sliding block, polyurethane materials are poured outside the sieve rods, and the distance between the sieve rods is 30-120 mm.
7. The polysilicon crushing apparatus and method according to claim 1, wherein: the running speed of the slide block is controlled to be 20-80mm/s during primary extrusion crushing, the running speed of the slide block is controlled to be 20-50mm/s during secondary extrusion crushing, and the running speed of the slide block is controlled to be 50-120mm/s during return stroke.
8. The polysilicon crushing apparatus and method according to claim 1, wherein: the width of the crushed silicon material is smaller than the distance between the sieve rods, the sieve rods can be leaked and sieved, and the crushed silicon material is subjected to secondary extrusion crushing when the width of the crushed silicon material is larger than the distance between the sieve rods.
9. The polysilicon crushing apparatus and method according to claim 1, wherein: one side of the fixed end, which corresponds to the sliding block, is provided with an alloy die with prismatic teeth, and the alloy die is fixed at the fixed end through a metal screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163207.3A CN111659488A (en) | 2019-03-05 | 2019-03-05 | Polycrystalline silicon extrusion crushing device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910163207.3A CN111659488A (en) | 2019-03-05 | 2019-03-05 | Polycrystalline silicon extrusion crushing device and method |
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| CN111659488A true CN111659488A (en) | 2020-09-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701692A (en) * | 2021-11-01 | 2021-11-26 | 邳州千润模具有限公司 | Quick fixing device for silicon block size detection and detection method |
| CN115193882A (en) * | 2022-06-02 | 2022-10-18 | 广亚铝业有限公司 | Intelligent device based on aluminum product production |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701692A (en) * | 2021-11-01 | 2021-11-26 | 邳州千润模具有限公司 | Quick fixing device for silicon block size detection and detection method |
| CN115193882A (en) * | 2022-06-02 | 2022-10-18 | 广亚铝业有限公司 | Intelligent device based on aluminum product production |
| CN115193882B (en) * | 2022-06-02 | 2024-01-09 | 广亚铝业有限公司 | Intelligent equipment based on aluminum product production |
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