CN202804188U - Device utilizing centrifugal atomization method to prepare spherical tin alloy powder - Google Patents
Device utilizing centrifugal atomization method to prepare spherical tin alloy powder Download PDFInfo
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- CN202804188U CN202804188U CN 201220539967 CN201220539967U CN202804188U CN 202804188 U CN202804188 U CN 202804188U CN 201220539967 CN201220539967 CN 201220539967 CN 201220539967 U CN201220539967 U CN 201220539967U CN 202804188 U CN202804188 U CN 202804188U
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Abstract
The utility model discloses a device utilizing a centrifugal atomization method to prepare spherical tin alloy powder. The device comprises a tin alloy atomization device (1), an atmosphere control device (2) is communicated with the tin alloy atomization device (1), the tin alloy atomization device (1) and an pneumatic separation device (3) form a sealed circulation, the atomized powder can pass through the sealed circulation, and the pneumatic separation device (3) is communicated with a mechanical screening device (4). According to the device, the atomization environment of the tin alloy atomization device can be effectively controlled through the atmosphere control device, the tin alloy powder is high in spherical degree, irregular powder is little, a granularity distribution range is narrow (even), the surface of the powder is smooth, oxygen content is low, output and yield are high, inert gas used during a production process is used in a circulation mode, production cost can be greatly reduced, and efficiency is greatly improved.
Description
Technical field:
The utility model relates to the technical field of processing equipment of electronic welding material, particularly is a kind of device that utilizes the standby spherical tin alloy powder of centrifugal atomizing legal system.
Background technology:
Surface mounting technology SMT (Surface Mount Technology) a kind ofly mounts the circuit assembly technology of printed substrate or substrate with various electronic devices and components, and oneself becomes most important process materials among the SMT solder(ing) paste.At present in the solder(ing) paste that SMT uses, except scaling powder and carrier, have in mass ratio 85%～92% to be the spherical tin alloy powder of various different-alloy compositions, the 3# powder (25～45 microns) that generally used in the past, generally replaced by 4# powder (20～38 microns) now, and 5# powder (15～25 microns) has begun in the industry cycle to use.The equipment of current preparation tin alloy powder has two kinds: aerodynamic atomization device and ultrasonic vibration atomizing device, the shortcoming of the tin alloy powder of aerodynamic atomization device preparation is: 1. rough, the abnormity powder is many, forms easily attritive powder and adheres to " satellite ball " than corase meal; 2. size distribution is wide, and the product recovery rate is low; 3. the product oxygen content is high.Although and the tin alloy powder of ultrasonic vibration atomizing device preparation can overcome the shortcoming of said flow atomizing, it has following deficiency: 1. yield poorly, per hour atomization ability only has about 30KG; 2. the recovery rate of 20～38 of the market common requirements microns 4# ashbury metal powder is less than 10%.
Summary of the invention:
Goal of the invention of the present utility model is the deficiency for the existing apparatus technology, but discloses a kind of high solder(ing) paste of the standby scalping granularity of centrifugal atomizing legal system and production efficiency that utilizes with the device of spherical tin alloy powder.
The technical solution that realizes this is as follows: comprise the ashbury metal atomising device, particularly atmosphere control device and ashbury metal atomising device are logical, ashbury metal atomising device and Pneumatic sorting device form the closed circulation that the rear alloying pellet of atomizing can pass through, and Pneumatic sorting device is communicated with mechanical sifter.
The inert gas source of the gas of described atmosphere control device is communicated with through the housing of inert gas gas source valve with the ashbury metal atomising device, simultaneously vavuum pump, oxygen concentration analysis and Control instrument and also be communicated with above-mentioned housing with the source of oxygen of oxygen source by-pass valve control.
Described ashbury metal atomising device has a housing, is provided with a high-speed electric expreess locomotive in the housing, and high-speed electric expreess locomotive drives a centrifugal turntable, and the top of housing is provided with holding furnace.
Described centrifugal turntable upper surface is turbination, angle β between its horizontal plane and the centrifugal turntable surface is 10 °～30 °, the diameter of centrifugal turntable is 10～100mm, the structure of holding furnace is for being respectively from outside to inside heat-insulation layer, electrical heating wire, crucible, the bottom of crucible is equipped with and is let slip a remark, be provided with unlatching in leting slip a remark or close the blocked shot of leting slip a remark, be provided with attemperating unit, two position control device in the crucible.
Described housing is for can pass into the double layer jacket structure that cooling water cools off, and its epimere is flat-top or ellipse, and the stage casing is cylinder, and hypomere is the reverse taper shape, and a discharging opening is arranged at the hypomere bottom.
The centrifugal classifier of described Pneumatic sorting device is communicated with the bottom discharge mouth of above-mentioned housing, the bottom of centrifugal classifier is provided with centrifugal aggregate tank and valve, the top outlet of centrifugal classifier is communicated with cyclone classifier, the bottom of cyclone classifier is provided with whirlwind aggregate tank and the whirlwind valve that gathers materials, and cyclone classifier is communicated with the closed circulation that forms gas through centrifugal blower with housing.
Described mechanical sifter comprises the vibration container that arranges on a vibration machine and the vibration machine, and the vibration container upper end communicates with centrifugal classifier, is provided with at least one screen cloth in the vibration container.
Described screen cloth has a rack, and rack is provided with the screen cloth face.
Be connected with resonant ring by adhesive on the described screen cloth face, resonant ring is provided with transducer, and transducer is connected with radio-frequency generator.
The utility model can make the atomizing environment of ashbury metal atomising device be effectively controlled by atmosphere control device, make that tin alloy powder has the sphericity height, special-shaped powder is few, particle size distribution is narrow (evenly), powder surface is smooth, oxygen content is low, output and recovery rate be high, and the inert gas that uses in the production process recycles, and can significantly reduce production costs and raise the efficiency.Because Integrated using Pneumatic separation and mechanical grading, once operation can obtain the particle of different-grain diameter requirement simultaneously, has further improved overall efficiency, has extraordinary economic benefit and energy-conservation social benefit.
Description of drawings:
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is a kind of structural representation of the centrifugal turntable that uses among the embodiment of the present utility model.
Fig. 3 is the structural representation of the screen cloth that uses among the embodiment of the present utility model.
Fig. 4 is the structural representation of the B-B section of Fig. 3.
The specific embodiment:
See also Fig. 1～Fig. 4, specific embodiment of the utility model is as follows: comprise ashbury metal atomising device 1, key is atmosphere control device 2 and is communicated with ashbury metal atomising device 1, ashbury metal atomising device 1 forms the closed circulation that the rear alloying pellet of atomizing can pass through with Pneumatic sorting device 3, and Pneumatic sorting device 3 is communicated with mechanical sifter 4.The structure of wherein said atmosphere control device 2 is seen accompanying drawing 1, and it comprises inert gas source of the gas 2-1, inert gas gas source valve 2-2, vavuum pump 2-3, oxygen source by-pass valve control 2-4, oxygen concentration analysis and Control instrument 2-5 and oxygen source 2-6.Specifically inert gas source of the gas 2-1 fills 1 housing 1-6 through the atomizing of inert gas gas source valve 2-2 and ashbury metal and is communicated with, while vavuum pump 2-3, oxygen concentration analysis and Control instrument 2-5 and also be communicated with above-mentioned housing 1-6 with the source of oxygen 2-6 of oxygen source by-pass valve control 2-4.Initial in device operation, after by vavuum pump 2-3 whole device being vacuumized, be filled with inert gas 2-1 valve-off 2-2 to the pressure-fired 1-4KPa in the device by opening valve 2-2.In the device running, by the oxygen concentration in the oxygen concentration analysis and Control instrument 2-5 checkout gear.The setting range of the oxygen concentration in the device is 20～200ppm, is preferably set to 40～100ppm.Set lower prescribing a time limit when oxygen concentration is lower than, oxygen concentration analysis and Control instrument 2-5 sends control signal and opens oxygen supply by-pass valve control 2-4, to the interior supplemental oxygen 2-6 of device; When oxygen concentration was higher than capping in the device, oxygen concentration analysis and Control instrument 2-5 sent control signal and closes oxygen supply by-pass valve control 2-4, stopped to the interior supplemental oxygen 2-6 of device.Oxygen concentration in the control device maintains an OK range thus, the sphericity of the alloy powder that assurance is produced.
The structure of described centrifugal atomization apparatus 1 is seen accompanying drawing 1, and it comprises holding furnace 1-2, the 1-3 that lets slip a remark, centrifugal turntable 1-4, high-speed electric expreess locomotive 1-5, housing 1-6.Particularly ashbury metal atomising device 1 has a housing 1-6, is provided with a high-speed electric expreess locomotive 1-5 in the housing 1-6, and high-speed electric expreess locomotive 1-5 drives a centrifugal turntable 1-4, and the top of housing 1-6 is provided with holding furnace 1-2; Alloy generally melts in another alloy thawing furnace 1-1.Alloy melting stove 1-1 is crucible electrical resistance furnace or Medium Frequency Induction Heating Furnace, holding furnace 1-2 is installed on housing 1-6 top, its structure is respectively heat-insulation layer from outside to inside, electrical heating wire, crucible, be provided with attemperating unit in the crucible, (not detailed label provides among the figure for two position control device and blocked shot, be prior art), the 1-3 that lets slip a remark is equipped with in the bottom of crucible, let slip a remark and be provided with the blocked shot of opening or closing the 1-3 that lets slip a remark in the 1-3, the 1-3 that lets slip a remark can change, can realize the control of alloy fluid flow by the 1-3 that lets slip a remark that changes different inner diameters, the internal diameter of leting slip a remark is generally 1.0～2.0mm, centrifugal turntable 1-4 is installed on high-speed electric expreess locomotive 1-5 axle head, and be positioned at the 1-3 that lets slip a remark under; The structure of centrifugal turntable 1-4 is seen accompanying drawing 2, the diameter d of centrifugal turntable 1-4 is generally 30～100mm, is preferably 40～70mm, and centrifugal turntable 1-4 upper surface is turbination, angle β between its horizontal plane and the centrifugal turntable 1-4 surface is 10 °～30 °, and optimized angle is 15 °～20 °; High-speed electric expreess locomotive 1-5 is installed in the housing 1-6 by support, and its range of speeds is 10000rpm～80000rpm, and preferable range is 30000rpm～60000rpm; Housing 1-6 is for can pass into the double layer jacket structure that cooling water cools off, its epimere is flat-top or ellipse, the stage casing is cylinder, hypomere is the reverse taper shape, one discharging opening is arranged at the hypomere bottom, the diameter range of housing 1-6 is 2.0～3.5m, is preferably 2.5～3.0m, and its design pressure is by anti--0.1MPa vacuum design.
The function of described centrifugal atomization apparatus 1 is: ashbury metal changes among the holding furnace 1-2 after melting in alloy melting stove 1-1, the crucible bottom of holding furnace 1-2 is equipped with the 1-3 that lets slip a remark, under the 1-3 that lets slip a remark, there is atomizing rotating disk 1-4 to be installed on the high-speed electric expreess locomotive 1-5 in the housing 1-6, alloy liquid drips on the centrifugal turntable 1-4 of High Rotation Speed by the 1-3 that lets slip a remark, under the effect of high speed centrifugation power, liquid becomes liquid film along centrifugal turntable 1-4 surface spreading, and be broken into countless droplets at disk edge, after cooling, form tin alloy powder.
The centrifugal classifier 3-1 of described Pneumatic sorting device 3 is communicated with the bottom discharge mouth of above-mentioned housing 1-6, the bottom of centrifugal classifier 3-1 is provided with centrifugal aggregate tank 3-3 and valve 3-2, the top outlet of centrifugal classifier 3-1 is communicated with cyclone classifier 3-6, the bottom of cyclone classifier 3-6 is provided with whirlwind aggregate tank 3-4 and the whirlwind valve 3-5 that gathers materials, and cyclone classifier 3-6 is communicated with the closed circulation that forms gas through centrifugal blower 3-7 with housing 1-6; After centrifugal blower 3-7 starts, the alloy powder of above-mentioned housing 1-6 bottom enters centrifugal classifier 3-1 with gas flow, larger particle enters centrifugal aggregate tank 3-3 under the effect of gravity and centrifugal force, rotational speed regulation centrifugal force by regulating electric machine 3-8, less particle enters whirlwind aggregate tank 3-4 again with the cyclone classifier 3-6 that flows into of gas, alloying pellet is behind secondary sorting, substantially collection is captured, final gas enters the closed circulation that housing 1-6 forms gas through centrifugal blower 3-7 again, realizes recycling of inert gas.
Contain few micro mist amount in the larger alloying pellet by centrifugal aggregate tank 3-3 collection, alloying pellet enters mechanical sifter 4 subsequently, mechanical sifter 4 comprises a vibration machine 4-7 and the upper vibration container 4-8 that arranges of vibration machine 4-7, vibration container 4-8 upper end communicates with centrifugal classifier 3-1, is provided with at least one screen cloth 4-9 in the vibration container 4-8; Screen cloth 4-9 can be one or two or three or more, and the mesh aperture difference of each screen cloth 4-9 can be sieved out different particles, is 20 μ m, 25 μ m, 38 μ m, 45 μ m or 75 μ m etc. such as the mesh aperture of screen cloth 4-9; During vibration machine 4-7 vibration, drive screen cloth 4-9 vibration, and then sieve, the screen cloth 4-9 of different mesh apertures sifts out the alloying pellet of different-diameter, but can be attached to owing to alloy powder on the mesh of screen cloth and stop up mesh, this had not only reduced the efficient of sub-sieve but also had affected the quality of the alloying pellet that each screen cloth obtains, therefore, for preventing that effectively alloy powder from stopping up screen cloth 4-9, improve screening efficiency, described screen cloth 4-9 has a rack 4-1, rack is provided with screen cloth face 4-2, screen cloth face 4-2 is connected with resonant ring 4-3 by adhesive 4-6, and resonant ring 4-3 is provided with transducer 4-4, and transducer 4-4 is connected with radio-frequency generator 4-5; In the use procedure, ultrasonic vibration occurs in transducer 4-4, drives screen cloth face 4-2 vibration, and ultrasonic wave also acts on the micro mist and make it to break away from screen cloth face 4-2, has effectively prevented the obstruction of alloy powder to screen cloth face 4-2; Resonant ring 4-3 is loop configuration band cross-shaped stay, and be welded in the end face of transducer 4-4, the assembly of transducer 4-4 and resonant ring 4-3 is tuned as with the driving frequency of radio-frequency generator 4-5 by size and structural design and produces resonance, resonant frequency range is 20～45KHZ, and preferable range is 30～40KHZ.
Below by one more specifically embodiment further specify the utility model: device operation is initial, after by vavuum pump 2-3 housing 1-6 being evacuated down to 15Pa (absolute pressure), be filled with again purity and be 99.999% high pure nitrogen to 2KPa (relative pressure, gauge pressure), the setting bound with oxygen concentration analysis and Control instrument 2-5 is set as respectively 40ppm and 60ppm; The raw alloy ingot fully changes holding furnace 1-2 over to after the fusing stirring in alloy melting stove 1-1, the temperature of holding furnace 1-2 is controlled at according to the difference of material and is higher than 50～100 ℃ of alloy melting points, the 1-3 that lets slip a remark is equipped with in bottom at holding furnace 1-2, the aperture of leting slip a remark is 1.8mm, alloy molten solution among the holding furnace 1-2 is transported on the centrifugal turntable 1-4 with the flow of 120Kg/H, centrifugal turntable diameter d=70mm, the β angle is 16.5 °, centrifugal turntable 1-4 is driven by high-speed electric expreess locomotive 1-5, and the rotating speed of high-speed electric expreess locomotive 1-5 is 50000rpm; The adjustment of rotational speed of centrifugal classifier 3-1 is 750rpm, effectively will be less than the dust removing of 20 μ m, adopt 3 layers of screen cloth 4-9 to carry out mechanical grading, the upper sieve screen distance is 75 μ m, the middle level mesh size is 45 μ m, the lower screen aperture is 25 μ m, and the resonant frequency of the clear net of every layer ultrasonic vibration system is tuned as 36KHZ, can collect simultaneously thus 2# powder (45～75 μ m) and 3# powder (25～45 μ m); At last to collecting to such an extent that the alloy powder product adopts to vacuumize or to vacuumize and can be used for solder(ing) paste production after rear filling with inert gas mode is packed, the tin alloy powder of producing by the utility model device be shaped as that sphere, oxygen content are low, smooth surface and even particle size distribution and product recovery rate be high.
The above only is preferred embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.
Claims (9)
1. the device of the standby spherical tin alloy powder of a centrifugal atomizing legal system, comprise ashbury metal atomising device (1), it is characterized in that atmosphere control device (2) is communicated with ashbury metal atomising device (1), ashbury metal atomising device (1) forms the closed circulation that the rear alloying pellet of atomizing can pass through with Pneumatic sorting device (3), and Pneumatic sorting device (3) is communicated with mechanical sifter (4).
2. centrifugal atomizing legal system according to claim 1 is for the device of spherical tin alloy powder, the inert gas source of the gas (2-1) that it is characterized in that described atmosphere control device (2) is communicated with the housing (1-6) of ashbury metal atomising device (1) through inert gas gas source valve (2-2), and simultaneously vavuum pump (2-3), oxygen concentration analysis and Control instrument (2-5) and the source of oxygen (2-6) of being with oxygen source by-pass valve control (2-4) also are communicated with above-mentioned housing (1-6).
3. centrifugal atomizing legal system according to claim 1 and 2 is for the device of spherical tin alloy powder, it is characterized in that described ashbury metal atomising device (1) has a housing (1-6), be provided with a high-speed electric expreess locomotive (1-5) in the housing (1-6), high-speed electric expreess locomotive (1-5) drives a centrifugal turntable (1-4), and the top of housing (1-6) is provided with holding furnace (1-2).
4. centrifugal atomizing legal system according to claim 3 is for the device of spherical tin alloy powder, it is characterized in that described centrifugal turntable (1-4) upper surface is turbination, angle β between its horizontal plane and centrifugal turntable (1-4) surface is 10 °～30 °, the diameter of centrifugal turntable (1-4) is 10～100mm, the structure of holding furnace (1-2) is for being respectively from outside to inside heat-insulation layer, electrical heating wire, crucible, let slip a remark (1-3) is equipped with in the bottom of crucible, leting slip a remark is provided with the blocked shot of opening or closing let slip a remark (1-3) in (1-3), is provided with attemperating unit in the crucible, the two position control device.
5. centrifugal atomizing legal system according to claim 4 is for the device of spherical tin alloy powder, it is characterized in that described housing (1-6) is for can pass into the double layer jacket structure that cooling water cools off, its epimere is flat-top or ellipse, the stage casing is cylinder, hypomere is the reverse taper shape, and a discharging opening is arranged at the hypomere bottom.
6. according to claim 1 and 2 or the device of the standby spherical tin alloy powder of 4 or 5 described centrifugal atomizing legal systems, the centrifugal classifier (3-1) that it is characterized in that described Pneumatic sorting device (3) is communicated with the bottom discharge mouth of above-mentioned housing (1-6), the bottom of centrifugal classifier (3-1) is provided with centrifugal aggregate tank (3-3) and valve (3-2), the top outlet of centrifugal classifier (3-1) is communicated with cyclone classifier (3-6), the bottom of cyclone classifier (3-6) is provided with whirlwind aggregate tank (3-4) and the whirlwind valve (3-5) that gathers materials, and cyclone classifier (3-6) is communicated with the closed circulation that forms gas through centrifugal blower (3-7) with housing (1-6).
7. centrifugal atomizing legal system according to claim 6 is for the device of spherical tin alloy powder, it is characterized in that described mechanical sifter (4) comprises a vibration machine (4-7) and the upper vibration container (4-8) that arranges of vibration machine (4-7), vibration container (4-8) upper end communicates with centrifugal classifier (3-1), is provided with at least one screen cloth (4-9) in the vibration container (4-8).
8. the device of the standby spherical tin alloy powder of centrifugal atomizing legal system according to claim 7 is characterized in that described screen cloth (4-9) has a rack (4-1), and rack is provided with screen cloth face (4-2).
9. centrifugal atomizing legal system according to claim 8 is for the device of spherical tin alloy powder, it is characterized in that the upper adhesive (4-6) that passes through of described screen cloth face (4-2) is connected with resonant ring (4-3), resonant ring (4-3) is provided with transducer (4-4), and transducer (4-4) is connected with radio-frequency generator (4-5).
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| CN 201220539967 CN202804188U (en) | 2012-10-22 | 2012-10-22 | Device utilizing centrifugal atomization method to prepare spherical tin alloy powder |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103223379A (en) * | 2013-04-24 | 2013-07-31 | 云南锡业集团有限责任公司研究设计院 | Method for collecting centrifugal atomization powder with different particle sizes |
| CN105312587A (en) * | 2015-12-11 | 2016-02-10 | 东北大学 | Centrifugal atomizing device for preparing metal powder |
| CN107745131A (en) * | 2017-10-26 | 2018-03-02 | 余国华 | Alloyed powder sorting unit |
| CN107983374A (en) * | 2016-03-22 | 2018-05-04 | 湖州慧金材料科技有限公司 | The method that activity spherical cuprous chloride catalyst is prepared using atomized molten system |
| CN109550969A (en) * | 2018-12-30 | 2019-04-02 | 北京康普锡威科技有限公司 | Prepare the centrifugal atomization apparatus and method of increasing material manufacturing Al/Cu base alloy powder |
| CN109807340A (en) * | 2019-01-31 | 2019-05-28 | 徐九生 | A kind of manufacture craft of conducting sphere |
| CN110238407A (en) * | 2019-06-21 | 2019-09-17 | 宁夏森源重工设备有限公司 | Novel iron alloy granulating device |
| CN110302962A (en) * | 2019-05-23 | 2019-10-08 | 中航迈特粉冶科技（北京）有限公司 | The screening system and method for sieving of active metal powder |
| CN113059169A (en) * | 2021-03-18 | 2021-07-02 | 中国科学院力学研究所 | Device for producing high-temperature metal powder by adopting turntable centrifugal atomization method |
| CN115198041A (en) * | 2022-07-08 | 2022-10-18 | 中国科学院力学研究所 | Particle size control system and method for centrifugal granulation and pulverization of rotary table and application |
| CN117548679A (en) * | 2024-01-09 | 2024-02-13 | 湖南艾缇欧新材料有限公司 | Tin powder preparation equipment and operation method |
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- 2012-10-22 CN CN 201220539967 patent/CN202804188U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103223379A (en) * | 2013-04-24 | 2013-07-31 | 云南锡业集团有限责任公司研究设计院 | Method for collecting centrifugal atomization powder with different particle sizes |
| CN103223379B (en) * | 2013-04-24 | 2014-06-18 | 云南锡业集团有限责任公司研究设计院 | Method for collecting centrifugal atomization powder with different particle sizes |
| CN105312587A (en) * | 2015-12-11 | 2016-02-10 | 东北大学 | Centrifugal atomizing device for preparing metal powder |
| CN107983374A (en) * | 2016-03-22 | 2018-05-04 | 湖州慧金材料科技有限公司 | The method that activity spherical cuprous chloride catalyst is prepared using atomized molten system |
| CN107745131A (en) * | 2017-10-26 | 2018-03-02 | 余国华 | Alloyed powder sorting unit |
| CN109550969A (en) * | 2018-12-30 | 2019-04-02 | 北京康普锡威科技有限公司 | Prepare the centrifugal atomization apparatus and method of increasing material manufacturing Al/Cu base alloy powder |
| CN109807340A (en) * | 2019-01-31 | 2019-05-28 | 徐九生 | A kind of manufacture craft of conducting sphere |
| CN110302962A (en) * | 2019-05-23 | 2019-10-08 | 中航迈特粉冶科技（北京）有限公司 | The screening system and method for sieving of active metal powder |
| CN110302962B (en) * | 2019-05-23 | 2020-10-20 | 中航迈特粉冶科技（北京）有限公司 | Active metal powder screening system and screening method |
| CN110238407A (en) * | 2019-06-21 | 2019-09-17 | 宁夏森源重工设备有限公司 | Novel iron alloy granulating device |
| CN110238407B (en) * | 2019-06-21 | 2023-09-19 | 宁夏森源重工设备有限公司 | Novel ferroalloy granulating device |
| CN113059169A (en) * | 2021-03-18 | 2021-07-02 | 中国科学院力学研究所 | Device for producing high-temperature metal powder by adopting turntable centrifugal atomization method |
| CN115198041A (en) * | 2022-07-08 | 2022-10-18 | 中国科学院力学研究所 | Particle size control system and method for centrifugal granulation and pulverization of rotary table and application |
| CN115198041B (en) * | 2022-07-08 | 2023-10-17 | 中国科学院力学研究所 | Particle size control system, method and application for centrifugal granulation and pulverization of turntable |
| CN117548679A (en) * | 2024-01-09 | 2024-02-13 | 湖南艾缇欧新材料有限公司 | Tin powder preparation equipment and operation method |
| CN117548679B (en) * | 2024-01-09 | 2024-03-22 | 湖南艾缇欧新材料有限公司 | Tin powder preparation equipment and operation method |
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