CN112275397A - Double dynamical no screen cloth intelligence nanometer sand mill - Google Patents
Double dynamical no screen cloth intelligence nanometer sand mill Download PDFInfo
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- CN112275397A CN112275397A CN202011210377.1A CN202011210377A CN112275397A CN 112275397 A CN112275397 A CN 112275397A CN 202011210377 A CN202011210377 A CN 202011210377A CN 112275397 A CN112275397 A CN 112275397A
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- discharging
- grinding cylinder
- shaft
- grinding
- main shaft
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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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
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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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/24—Driving mechanisms
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a double-power intelligent nano sand mill without a screen, and belongs to the technical field of nano sand mills. The method comprises the following steps: a frame; the grinding cylinder is internally provided with a plurality of grinding beads and arranged on the rack, and one end of the grinding cylinder is provided with a feeding hole; the rotary separation component comprises a first driving mechanism, a main shaft and a plurality of first bar pins; a plurality of first bar pins are uniformly distributed on the outer wall of the main shaft in the grinding cylinder; the rotary discharging assembly comprises a second driving mechanism, a discharging shaft with a discharging channel inside, a separator and a plurality of second bar pins; one end of the discharging shaft horizontally penetrates through the grinding cylinder, and the other end of the discharging shaft extends into the grinding cylinder and is driven to rotate by the second driving mechanism; the plurality of second bar pins are uniformly distributed on the outer wall of the separator; the double-power driven main shaft with the first bar pin and the separator with the second bar pin independently move in the grinding cylinder, so that the double-power driven main shaft separator is good in separation effect, not easy to block and high in efficiency.
Description
Technical Field
The invention relates to the technical field of nano sand mills, in particular to a double-power intelligent nano sand mill without a screen.
Background
There are numerous types of prior sand mills, including mills for dry primary crushing grinding, such as Raymond mills, pile mills, etc.; also included are micron-size wet mills, such as ball-and-disk mills, colloid mills, air-jet mills, ultrasonic mills, agitator mills, homogenizers, emulsifiers, tumbling mills, and the like.
In modern production and life, some new materials are often required to be subjected to superfine grinding and smashing again, and are intercepted and separated through a filtering screen type separation structure, the discharge port of the sand mill with the structure is easy to block, the separation effect is poor, and the production efficiency is low.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to solve the technical problem of providing the double-power intelligent nano sand mill without the screen, and the double-power intelligent nano sand mill has the advantages of good material separation effect, difficult blockage and high efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a double-power non-screen intelligent nano sand mill, which comprises:
a frame;
the grinding cylinder is internally provided with a plurality of grinding beads and is arranged on the rack, and one end of the grinding cylinder is provided with a feeding hole;
the rotary separation component comprises a first driving mechanism, a main shaft and a plurality of first bar pins; one end of the main shaft horizontally penetrates through one end of the grinding cylinder, extends into the grinding cylinder and is driven to rotate by the first driving mechanism; the first bar pins are uniformly distributed on the outer wall of the main shaft in the grinding cylinder;
the rotary discharging assembly comprises a second driving mechanism, a discharging shaft with a discharging channel inside, a separator and a plurality of second bar pins; one end of the discharging shaft horizontally penetrates through the grinding cylinder, and the other end of the discharging shaft extends into the grinding cylinder and is driven to rotate by the second driving mechanism; the separator is positioned in the grinding cylinder and sleeved on the discharging shaft, the separator is provided with a discharging cavity communicated with the discharging channel, and the discharging cavity is provided with a plurality of discharging holes communicated with the inside of the grinding cylinder; the second bar pins are uniformly distributed on the outer wall of the separator;
the main shaft is located one side of the discharging shaft, and a gap exists between the main shaft and the discharging shaft.
According to another specific embodiment of the present invention, the first driving mechanism is located at one side of the grinding machine, and the first driving mechanism comprises a main motor, a first driving pulley, a first belt, and a first driven pulley; the main motor is located on one side of the grinding cylinder and fixed on the rack, and the first driving belt wheel is sleeved on the power output end of the main motor and is movably connected with the first driven belt wheel sleeved on the main shaft through the first belt.
According to another specific embodiment of the present invention, the second driving mechanism is located at the other side of the grinding cylinder, and the second driving mechanism includes a separation motor, a second driving pulley, a second belt, and a second driven pulley; the main motor is positioned on the other side of the grinding cylinder and fixed on the rack, and the second driving belt wheel is sleeved on the power output end of the separation motor and is movably connected with the driven belt wheel sleeved on the discharge shaft through the second belt.
According to another specific embodiment of the present invention, the grinding apparatus further comprises a bearing seat and a plurality of first bearings, wherein the bearing seat and the plurality of first bearings are located on one side of the grinding cylinder, the plurality of first bearings are embedded in the bearing seat and sleeved on the main shaft, and the main shaft horizontally penetrates through the bearing seat.
According to another specific embodiment of the invention, the grinding device further comprises a supporting seat and a plurality of second bearings, wherein the supporting seat and the plurality of second bearings are positioned on the other side of the grinding cylinder, the plurality of second bearings are embedded in the supporting seat and sleeved on a discharging shaft, and the discharging shaft horizontally penetrates through the supporting seat.
According to another specific embodiment of the present invention, the axial line of the main shaft and the axial line of the discharging shaft are the same straight line.
According to another embodiment of the invention, one end of the grinding cylinder is provided with a bead discharging port.
According to another specific embodiment of the present invention, the plurality of discharge holes are uniformly distributed on the outer wall of the separator, and the plurality of discharge holes and the plurality of second pins are arranged at intervals.
According to another specific embodiment of the present invention, a discharge hole is formed at a terminal of the discharge shaft away from the grinding cylinder, and the discharge hole is sleeved with a mechanical seal.
According to another specific embodiment of the invention, the discharge port is connected with a discharge connection port which is wide inside and narrow outside.
Compared with the prior art, the invention has the beneficial effects that:
the double-power-driven grinding device is provided with a first driving mechanism and a second driving mechanism, the double-power-driven main shaft provided with a first bar pin and a separator provided with a second bar pin move independently in a grinding cylinder, grinding media, namely grinding zirconium beads and large-particle materials are thrown outwards, and the grinding zirconium beads are prevented from entering a discharge channel in a hollow discharge shaft from a discharge hole; under the pressure action in the grinding cylinder, fine materials can overcome the rotary centrifugal force, enter the discharging cavity from the discharging hole and then flow to the discharging channel of the hollow discharging shaft for discharging, so that the high-efficiency discharging is realized, and the blocking condition is avoided;
in addition, a discharging channel is arranged in the discharging shaft, the discharging shaft is driven to rotate by the second driving mechanism, the discharging shaft rotates in the process of conveying materials to reduce adhesion and blockage, and the working efficiency is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a dual-power non-screen intelligent nano sand mill provided by an embodiment of the invention;
fig. 2 is a schematic view of a partially enlarged structure at a position a of the dual-power non-screen intelligent nano sand mill provided by the embodiment of the invention.
In the figure:
1. a frame; 2. a grinding cylinder; 3. a feed inlet; 4. a main shaft; 5. a first bar pin; 6. a main motor; 61. a first driving pulley; 62. a first belt; 63. a first driven pulley; 7. discharging the material shaft; 71. a discharge channel; 8. a separator; 81. a discharge cavity; 82. a discharge hole; 9. a second bar pin; 10. separating the motor; 101. a second driving pulley; 102. a second belt; 103. a second driven pulley; 11. a bearing seat; 111. a first bearing; 12. a supporting seat; 121. a second bearing; 13. bead unloading openings; 14. a discharge port; 15. a discharge connection port; 16. and (4) mechanically sealing.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 1 and 2, the dual-power non-screen intelligent nano sand mill comprises: a frame 1; the grinding cylinder 2 is arranged on the frame 1, a plurality of grinding beads are arranged in the grinding cylinder 2, and a feeding hole 3 is formed in one end of the grinding cylinder 2; the rotary separation component comprises a first driving mechanism, a main shaft 4 and a plurality of first bar pins 5; one end of the main shaft 4 horizontally penetrates through one end of the grinding cylinder 2, extends into the grinding cylinder 2 and is driven to rotate by the first driving mechanism; a plurality of first bar pins 5 are uniformly distributed on the outer wall of the main shaft 4 in the grinding cylinder 2; the rotary discharging assembly comprises a second driving mechanism, a discharging shaft 7 with a discharging channel 71 inside, a separator 8 and a plurality of second bar pins 9; one end of the discharging shaft 7 horizontally penetrates through the grinding cylinder 2, and the other end of the discharging shaft extends into the grinding cylinder 2 and is driven to rotate by the second driving mechanism; the separator 8 is positioned in the grinding cylinder 2 and sleeved on the discharging shaft 7, the separator 8 is provided with a discharging cavity 81 communicated with the discharging channel 71, and the discharging cavity 81 is provided with a plurality of discharging holes 82 communicated with the inside of the grinding cylinder 2; the second bar pins 9 are uniformly distributed on the outer wall of the separator 8; the main shaft 4 is positioned at one side of the discharging shaft 7, and a gap exists between the main shaft 4 and the discharging shaft 7.
The double-power-driven grinding device is provided with a first driving mechanism and a second driving mechanism, the double-power-driven main shaft 4 provided with a first rod pin 5 and a separator 8 provided with a second rod pin 9 move independently in a grinding cylinder 2, and the separator 8 is sleeved on a discharging shaft 7 and is communicated with a channel in the discharging shaft 7 through a discharging cavity 81; the grinding media, namely the grinding zirconium beads and the large-particle materials are thrown outwards, so that the grinding zirconium beads are prevented from entering the discharging channel 71 in the hollow discharging shaft 7 from the discharging hole 82; under the pressure action in the grinding cylinder 2, fine materials can overcome the rotary centrifugal force, enter the discharging cavity 81 from the discharging hole 82 and then flow to the discharging channel 71 of the hollow discharging shaft 7 for discharging, so that the high-efficiency discharging is realized, and the blocking is avoided; in the embodiment, preferably, the first driving mechanism and the second driving mechanism are in belt transmission, and the rotating speed of the material shaft 7 and the rotating speed of the main shaft 4 are selected to be unequal, so that a speed difference exists between the first driving mechanism and the second driving mechanism, and the material in the grinding cylinder 2 and the grinding balls rotate in different speed differences to generate violent collision, so that the grinding effect is greatly improved; the first bar pin 5 and the second bar pin 9 can stir and grind materials and grinding beads, and the grinding beads can be zirconium beads with the diameter of more than 0.05 mm; the invention can input materials or zirconium beads through the feed inlet 3; the discharge port 14 discharges the ground material; the discharge holes 82 are communicated with the discharge cavity 81 and used for transporting the materials in the discharge shaft 7 and the grinding cylinder 2, and the separator 8 is provided with the discharge holes 82 and the discharge cavity 81 and used for separating and conveying the materials;
in addition, a discharging channel 71 is arranged in the discharging shaft 7, the discharging shaft 7 is driven to rotate by the second driving mechanism, the discharging shaft 7 rotates in the process of conveying materials to reduce adhesion and blockage, and the working efficiency is further improved.
According to another embodiment of the present invention, the first driving mechanism is located at one side of the grinding, and the first driving mechanism comprises a main motor 6, a first driving pulley 61, a first belt 62, a first driven pulley 63; the main motor 6 is located at one side of the grinding cylinder 2 and fixed on the frame 1, and the first driving pulley 61 is sleeved on the power output end of the main motor 6 and is movably connected with the first driven pulley 63 sleeved on the main shaft 4 through a first belt 62.
According to another embodiment of the present invention, a second driving mechanism is located at the other side of the grinding cylinder 2, and the second driving mechanism includes a separation motor 10, a second driving pulley 101, a second belt 102, and a second driven pulley 103; the main motor 6 is located at the other side of the grinding cylinder 2 and fixed on the frame 1, and the second driving pulley 101 is sleeved on the power output end of the separation motor 10 and is movably connected with the driven pulley sleeved on the discharging shaft 7 through a second belt 102. The first and second driving pulleys of the first driving pulley 61 and the second driving pulley 101 are used for distinguishing pulleys; the first driving mechanism and the second driving mechanism are used for belt transmission;
according to another embodiment of the present invention, the polishing apparatus further comprises a bearing seat 11 and a plurality of first bearings 111, the bearing seat 11 and the plurality of first bearings 111 are located at one side of the polishing drum 2, the plurality of first bearings 111 are embedded in the bearing seat 11 and sleeved on the main shaft 4, and the main shaft 4 horizontally penetrates through the bearing seat 11.
According to another embodiment of the present invention, the grinding device further comprises a supporting seat 12 and a plurality of second bearings 121, wherein the supporting seat 12 and the plurality of second bearings 121 are located on the other side of the grinding cylinder 2, the plurality of second bearings 121 are embedded in the supporting seat 12 and sleeved on the discharging shaft 7, and the discharging shaft 7 horizontally penetrates through the supporting seat 12. The first and second bearings 111 and 121 are used for distinguishing different bearing positions and purposes, the first bearing 111 is used for ensuring the rotation precision of the main shaft 4, and the second bearing 121 is used for ensuring the rotation precision of the discharging shaft 7; the bearing seat 11 is used for supporting the first bearing 111 and the main shaft 4; the bearing block 12 is used for supporting the second bearing 121 and the discharging shaft 7; the number of the first bearings 111 and the number of the second bearings 121 are both two.
According to another embodiment of the present invention, the axial line of the main shaft 4 and the axial line of the discharging shaft 7 are the same straight line. The main shaft 4 and the discharging shaft 7 are arranged on the same level, and the main shaft 4 and the discharging shaft 7 are arranged on the central connecting lines of the two ends of the grinding cylinder 2; the first bar pin 5 and the second bar pin 9 are uniformly arranged as far as possible, and the materials in the grinding cylinder 2 are fully stirred and contacted, so that the problem that the materials in a part of space are accumulated and cannot be treated is avoided;
according to another embodiment of the invention, the grinding vessel 2 is provided with a bead discharge opening 13 at one end. A bead discharge port 13 is provided for discharging grinding beads;
according to another embodiment of the present invention, the plurality of discharging holes 82 are uniformly distributed on the outer wall of the separator 8, and the plurality of discharging holes 82 are spaced apart from the plurality of second pins 9.
According to another embodiment of the present invention, a discharge port 14 is opened at an end of the discharge shaft 7 away from the grinding cylinder 2, and the discharge port 14 is sleeved with a mechanical seal 16. The mechanical seal 16 is arranged for connecting the discharging connecting port 15 and the like, so that the sealing effect of the conveyed material is ensured, the leakage is avoided, and meanwhile, the rotating state of the discharging shaft 7 is ensured not to be interfered.
According to another embodiment of the present invention, the discharging hole 14 is connected with a discharging connection port 15 which is wide inside and narrow outside. A discharge connecting port 15 is arranged for providing a connecting port between the discharge port 14 and equipment or a material receiving device such as an air pump, a water pump and the like;
the above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. Double dynamical no screen cloth intelligence nanometer sand mill, its characterized in that includes:
a frame;
the grinding cylinder is internally provided with a plurality of grinding beads and is arranged on the rack, and one end of the grinding cylinder is provided with a feeding hole;
the rotary separation component comprises a first driving mechanism, a main shaft and a plurality of first bar pins; one end of the main shaft horizontally penetrates through one end of the grinding cylinder, extends into the grinding cylinder and is driven to rotate by the first driving mechanism; the first bar pins are uniformly distributed on the outer wall of the main shaft in the grinding cylinder;
the rotary discharging assembly comprises a second driving mechanism, a discharging shaft with a discharging channel inside, a separator and a plurality of second bar pins; one end of the discharging shaft horizontally penetrates through the grinding cylinder, and the other end of the discharging shaft extends into the grinding cylinder and is driven to rotate by the second driving mechanism; the separator is positioned in the grinding cylinder and sleeved on the discharging shaft, the separator is provided with a discharging cavity communicated with the discharging channel, and the discharging cavity is provided with a plurality of discharging holes communicated with the inside of the grinding cylinder; the second bar pins are uniformly distributed on the outer wall of the separator;
the main shaft is located one side of the discharging shaft, and a gap exists between the main shaft and the discharging shaft.
2. The dual-power non-screen intelligent nano sand mill of claim 1, characterized in that:
the first driving mechanism is positioned on one side of the grinding machine and comprises a main motor, a first driving belt wheel, a first belt and a first driven belt wheel; the main motor is located on one side of the grinding cylinder and fixed on the rack, and the first driving belt wheel is sleeved on the power output end of the main motor and is movably connected with the first driven belt wheel sleeved on the main shaft through the first belt.
3. The dual-power non-screen intelligent nano sand mill of claim 2, characterized in that:
the second driving mechanism is positioned on the other side of the grinding cylinder and comprises a separation motor, a second driving belt wheel, a second belt and a second driven belt wheel; the main motor is positioned on the other side of the grinding cylinder and fixed on the rack, and the second driving belt wheel is sleeved on the power output end of the separation motor and is movably connected with the driven belt wheel sleeved on the discharge shaft through the second belt.
4. The dual-power non-screen intelligent nano sand mill of claim 3, characterized in that:
the grinding device is characterized by further comprising a bearing seat and a plurality of first bearings, wherein the bearing seat and the plurality of first bearings are located on one side of the grinding cylinder, the plurality of first bearings are embedded in the bearing seat and sleeved on the main shaft, and the main shaft horizontally penetrates through the bearing seat.
5. The dual-power non-screen intelligent nano sand mill of claim 4, characterized in that:
the grinding device is characterized by further comprising a supporting seat and a plurality of second bearings, wherein the supporting seat and the second bearings are located on the other side of the grinding cylinder, the second bearings are embedded in the supporting seat and sleeved on the discharging shaft, and the discharging shaft horizontally penetrates through the supporting seat.
6. The dual-power non-screen intelligent nano sand mill of claim 5, characterized in that:
the axial lead of the main shaft and the axial lead of the discharging shaft are the same straight line.
7. The dual-power non-screen intelligent nano sand mill of claim 1, characterized in that:
one end of the grinding cylinder is provided with a bead unloading opening.
8. The dual-power non-screen intelligent nano sand mill of claim 1, characterized in that:
the discharging holes are uniformly distributed on the outer wall of the separator, and the discharging holes and the second rod pins are arranged at intervals.
9. The dual-power non-screen intelligent nano sand mill of claim 1, characterized in that:
the discharging shaft is far away from one end of the grinding cylinder, a discharging port is formed in the tail end of the grinding cylinder, and a mechanical seal is sleeved on the discharging port.
10. The dual-power non-screen intelligent nano sand mill of claim 9, characterized in that:
the discharge port is connected with a discharge connecting port with a wide inner part and a narrow outer part.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210377.1A CN112275397A (en) | 2020-11-03 | 2020-11-03 | Double dynamical no screen cloth intelligence nanometer sand mill |
| CN202110812148.5A CN113368972B (en) | 2020-11-03 | 2021-07-19 | Double dynamical no screen cloth intelligence nanometer sand mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210377.1A CN112275397A (en) | 2020-11-03 | 2020-11-03 | Double dynamical no screen cloth intelligence nanometer sand mill |
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| Publication Number | Publication Date |
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| CN112275397A true CN112275397A (en) | 2021-01-29 |
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| CN202011210377.1A Pending CN112275397A (en) | 2020-11-03 | 2020-11-03 | Double dynamical no screen cloth intelligence nanometer sand mill |
| CN202110812148.5A Active CN113368972B (en) | 2020-11-03 | 2021-07-19 | Double dynamical no screen cloth intelligence nanometer sand mill |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110812148.5A Active CN113368972B (en) | 2020-11-03 | 2021-07-19 | Double dynamical no screen cloth intelligence nanometer sand mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115999716A (en) * | 2022-12-23 | 2023-04-25 | 襄阳鸿凯智能装备有限公司 | Double dynamical no screen cloth nanometer sand mill |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130485B (en) * | 2021-11-25 | 2022-06-14 | 东莞市华汇精密机械有限公司 | Double-convex-pin-type nano sand mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102006018325A1 (en) * | 2006-04-19 | 2007-10-25 | Fritsch Gmbh | Ball mill especially for laboratory scale samples has rotating mountings for the milling beaker and the mounting plate with adjustable counterweight |
| CN204996505U (en) * | 2015-07-24 | 2016-01-27 | 江苏神彩印刷包装材料有限公司 | Production printing ink is with realizing a high -efficient combination formula sanding section of thick bamboo that grinds |
| CN106863575B (en) * | 2016-12-22 | 2018-12-21 | 徐州工程学院 | A kind of molding equipment and its working method for air entrained concrete production |
| CN106874568B (en) * | 2017-01-17 | 2018-02-23 | 中南大学 | A kind of material particular diameter distribution forecasting method of mechanical milling process |
| CN107597306B (en) * | 2017-11-08 | 2019-05-17 | 铜陵市明诚铸造有限责任公司 | A kind of abrading-ball crushing automatic control system based on image analysis |
| CN110947470B (en) * | 2018-09-26 | 2024-05-14 | 安徽儒特实业有限公司 | Screen-free efficient sand mill |
| CN110193408A (en) * | 2019-05-21 | 2019-09-03 | 东莞市琅菱机械有限公司 | A kind of vertical centrifugal isolates abrasive lapping system |
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2020
- 2020-11-03 CN CN202011210377.1A patent/CN112275397A/en active Pending
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- 2021-07-19 CN CN202110812148.5A patent/CN113368972B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115999716A (en) * | 2022-12-23 | 2023-04-25 | 襄阳鸿凯智能装备有限公司 | Double dynamical no screen cloth nanometer sand mill |
| CN115999716B (en) * | 2022-12-23 | 2023-07-25 | 襄阳鸿凯智能装备有限公司 | Double dynamical no screen cloth nanometer sand mill |
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| Publication number | Publication date |
|---|---|
| CN113368972B (en) | 2022-01-11 |
| CN113368972A (en) | 2021-09-10 |
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