Superfine metal spherical powder production system

Abstract

The utility model relates to a superfine metal spherical powder production system which comprises a reaction unit, a grinding unit and a spheroidizing unit which are sequentially arranged, the reaction unit comprises at least one reaction kettle, the grinding unit comprises at least one grinding mechanism, the grinding mechanism is used for grinding intermediates and screening the intermediates to obtain fine powder with the particle size smaller than 30 microns, and the spheroidizing unit is used for spheroidizing the intermediates. The spheroidizing unit comprises at least one spheroidizing device, the spheroidizing device is used for spheroidizing fine powder, the spheroidizing device further comprises a gas source, and the gas source is connected with the reaction unit, the grinding unit and the spheroidizing unit and used for providing protective gas for the reaction unit, the grinding unit and the spheroidizing unit. The gas source is connected with the reaction unit, the grinding unit and the spheroidizing unit, protective gas can be provided for the reaction unit, the grinding unit and the spheroidizing unit, production is carried out under protective gas such as argon, materials are conveyed through the protective gas such as argon, contact between the materials and air in the production process is reduced, the oxygen content of powder is reduced, and the production efficiency is improved. Further, the strength and impact toughness of the powder are improved.

Description

Technical Field

[0001] This application relates to the field of chemical equipment technology, specifically to an ultrafine metal spherical powder production system. Background Technology

[0002] Titanium and titanium-aluminum alloys possess advantages such as light weight, high specific strength, good biocompatibility, and corrosion resistance, making them widely used in aerospace, medical, chemical, and shipbuilding industries. Titanium and titanium-aluminum alloys can be used in fuselage skins, bulkheads, beams, doors, landing gear, wing ribs, fastener guides, tie rods, and rotating components of aero-engines (such as fans, high-pressure compressor discs, and blades).

[0003] Compared to irregular metal powders, spherical powders have advantages such as regular surface, fewer defects, narrower and more uniform particle size distribution, and better flowability, and are widely used in the field of additive manufacturing. Typically, additive manufacturing powders have a particle size range of 15-53 μm; however, with the application of additive manufacturing technology in fields such as electronics, information technology, and biomedicine, the demand for ultrafine spherical powders with a particle size <30 μm has increased dramatically.

[0004] The ultrafine powders used in additive manufacturing technology should have the following characteristics: higher sphericity and lower hollowness to significantly improve the surface quality and density of the molded parts, reduce defects, and enhance the overall performance of the product; better flowability to help improve production efficiency, reduce processing time, and lower costs.

[0005] However, there is still a lack of mature production systems with the potential for large-scale production of titanium and titanium-aluminum alloy ultrafine spherical powders. Furthermore, when using existing equipment to produce titanium-based ultrafine spherical powders, the oxygen content of the resulting titanium and titanium-aluminum alloy ultrafine spherical powders needs to be further reduced, and the strength and impact toughness of the titanium and titanium-aluminum alloy ultrafine spherical powders need to be further improved. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, this utility model provides an ultrafine metal spherical powder production system to realize the large-scale production of titanium and titanium-aluminum alloy ultrafine metal spherical powders, and reduce the oxygen content of the obtained titanium and titanium-aluminum alloy ultrafine spherical powders, thereby improving the strength and impact toughness of titanium and titanium-aluminum alloy ultrafine spherical powders.

[0007] To achieve the above objectives, the solution proposed in this application is as follows:

[0008] This utility model provides a production system for ultrafine metal spherical powder, wherein the microstructure of the ultrafine metal spherical powder is spherical;

[0009] The ultrafine metal spherical powder production system includes a reaction unit, a grinding unit, and a spheroidizing unit arranged in sequence.

[0010] The reaction unit includes at least one reaction vessel, which provides a reaction site for the preparation of intermediates. The preparation process of intermediates includes reduction reaction and purification. The reduction reaction is the process of generating intermediates and by-products by reducing raw materials under a protective atmosphere. The purification includes distilling by-products to obtain intermediates.

[0011] The grinding unit includes at least one grinding mechanism, which is used to grind the intermediate and sieve to obtain fine powder with a particle size of <30μm;

[0012] The spheroidizing unit includes at least one spheroidizing device, which is used to spheroidize the fine powder to obtain the ultrafine metal spherical powder.

[0013] The ultrafine metal spherical powder production system also includes a gas source, which is connected to the reaction unit, the grinding unit and the spheroidizing unit respectively, and is used to provide protective gas for the reaction unit, the grinding unit and the spheroidizing unit.

[0014] The principle of this utility model's ultrafine metal spherical powder production system is as follows: by connecting the gas source to the reaction unit, the grinding unit, and the spheroidizing unit respectively, protective gas can be provided to the reaction unit, the grinding unit, and the spheroidizing unit. Production can be carried out under a protective atmosphere such as argon, and materials are transported through a protective atmosphere such as argon, reducing the contact between materials and air during the production process, reducing the oxygen content of the produced ultrafine spherical powder, thereby improving the strength and impact toughness of the ultrafine spherical powder. Semi-automatic production is achieved by transporting materials through gas, so as to realize industrial production and increase production capacity.

[0015] Optionally, the general chemical formula of the ultrafine metal spherical powder is M x A y D z M represents Ti, A represents Al, D represents vanadium, 1≤x≤6, 1≤y≤4, 0≤z≤1; the particle size of the ultrafine metal spherical powder is <30μm, and the raw materials include potassium fluorotitanate and aluminum powder or potassium fluorotitanate, aluminum powder and aluminum-vanadium alloy powder.

[0016] For example, when producing Ti using potassium fluorotitanate and aluminum powder as raw materials, Ti, K3AlF6, and 3K5Al3F are obtained through a reduction reaction at a molar ratio of potassium fluorotitanate to aluminum powder of 12:16. 14 A mixture with 4AlF3, wherein Ti is an intermediate (particle size does not meet requirements, and the shape is not spherical), K3AlF6, 3K5Al3F 14 It is a byproduct of 4AlF3, that is:

[0017] 12K2TiF6+16Al=12Ti+3K3AlF6+3K5Al3F 14 +4AlF3;

[0018] When TiAl is produced using potassium fluorotitanate and aluminum powder as raw materials, TiAl, K3AlF6, and 3K5Al3F are obtained through a reduction reaction at a molar ratio of potassium fluorotitanate to aluminum powder of 12:28. 14 A mixture with 4AlF3, wherein TiAl is an intermediate, K3AlF6, and 3K5Al3F 14 It is a byproduct of 4AlF3, that is;

[0019] 12K2TiF6+28Al=12TiAl+3K3AlF6+3K5Al3F 14 +4AlF3;

[0020] When Ti3Al is produced using potassium fluorotitanate and aluminum powder as raw materials, Ti3Al, K3AlF6, and 3K5Al3F are obtained through a reduction reaction at a molar ratio of potassium fluorotitanate to aluminum powder of 12:20. 14 A mixture with 4AlF3, wherein Ti3Al is an intermediate, K3AlF6, and 3K5Al3F... 14 It is a byproduct of 4AlF3, that is;

[0021] 12K2TiF6+20Al=4Ti3Al+3K3AlF6+3K5Al3F 14 +4AlF3.

[0022] Optionally, the ultrafine metal spherical powder production system further includes a first vacuum packaging unit and / or a second vacuum packaging unit, wherein the first vacuum packaging unit is used to vacuum package the intermediate, and the second vacuum packaging unit is used to vacuum package the ultrafine metal spherical powder.

[0023] Specifically, this invention, by adding a first vacuum packaging unit, can vacuum package the intermediate material, preventing adverse effects on the powder's performance caused by contact with oxygen in the air during the transfer of the intermediate material from the reaction vessel to the grinding mechanism. This invention, by adding a second vacuum packaging unit, can vacuum package the obtained ultrafine metal spherical powder, preventing adverse effects on the powder's performance caused by contact with oxygen in the air during storage.

[0024] Optionally, the ultrafine metal spherical powder production system further includes a mixer for mixing raw materials.

[0025] Optionally, the grinding unit includes a first hopper, a first powder feeder, and a grinding mechanism arranged sequentially.

[0026] Optionally, at least two connecting pipes are provided between the first powder feeder and the ball milling equipment.

[0027] Specifically, this invention provides at least two connecting pipes between the first powder feeder and the grinding mechanism, which ensures the normal operation of the production system even if one pipe fails and cannot be used normally.

[0028] Optionally, the connecting pipe between the first powder feeder and the grinding mechanism is a corrugated pipe.

[0029] Specifically, by using a corrugated pipe to connect the first powder feeder and the grinding mechanism, this invention avoids the negative impact of vibration of the grinding mechanism during operation on the sealing performance of the pipe between the two, thereby further reducing the oxygen content of the powder.

[0030] Optionally, the spheroidizing unit includes a second hopper, a second powder feeder, and a spheroidizing device arranged sequentially.

[0031] Optionally, the grinding mechanism includes a grinder and a sieve. The sieve has a coarse powder outlet and a fine powder outlet. The coarse powder outlet is connected to the first hopper, and the fine powder outlet is connected to the spheroidizing unit.

[0032] Specifically, by connecting the coarse powder outlet to the first silo, this utility model can send coarse powder that does not meet the particle size requirements after screening back to the first silo for further processing, thereby improving resource utilization.

[0033] Optionally, at least two connecting pipes are provided between the grinding machine and the screening machine.

[0034] Specifically, by setting at least two connecting pipes between the grinding machine and the screening machine, this utility model can ensure the normal operation of the production system through the other pipes if one of the pipes fails and cannot be used normally.

[0035] Optionally, the connecting pipe between the grinding machine and the screening machine is a corrugated pipe.

[0036] Specifically, by using a corrugated pipe to connect the grinder and the sieve, this invention avoids the negative impact of vibration during operation on the sealing performance of the pipe, thereby further reducing the oxygen content of the powder.

[0037] Optionally, the screening machine is equipped with a filter screen, the mesh size of which is greater than 480 mesh.

[0038] Optionally, the ultrafine metal spherical powder production system further includes a vacuum unit, which is connected to the reaction vessel, the grinding unit and the spheroidizing unit respectively, and is used to evacuate the reaction vessel, the grinding unit and the spheroidizing unit.

[0039] Optionally, the ultrafine metal spherical powder production system further includes a filter located between the vacuum unit and the reactor and / or the grinding unit and / or the spheroidizing unit, for filtering out powder entrained in the gas flow.

[0040] Specifically, this invention can filter out powder entrained in the protective gas by adding a filter located between the vacuum unit and the reaction vessel and / or the grinding unit and / or the spheroidizing unit, thus avoiding adverse effects of the powder on production.

[0041] Optionally, the spheroidizing device is a plasma spheroidizing device. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the ultrafine metal spherical powder production system of Example 1;

[0044] Figure 2 This is a schematic diagram of the ultrafine metal spherical powder production system of Example 2;

[0045] Figure 3 This is a schematic diagram of the ultrafine metal spherical powder production system of Example 3;

[0046] Figure Labels

[0047] 1-Mixer;

[0048] 2-Reaction vessel;

[0049] 3-Gas source;

[0050] 4-First vacuum packaging machine;

[0051] 5-Vacuum glove box;

[0052] 6-First silo;

[0053] 7-First powder feeder;

[0054] 8-Grinding machine;

[0055] 9- Screening machine;

[0056] 10-Second hopper;

[0057] 11-Second powder feeder;

[0058] 12-Spheroidizing equipment;

[0059] 13-Second vacuum packaging machine;

[0060] 14-Filter;

[0061] 15 - Vacuum unit;

[0062] 16-Solenoid valve;

[0063] 17-Pressure transmitter. Detailed Implementation

[0064] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0065] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0066] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0067] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0068] One embodiment of this utility model provides a production system for ultrafine metal spherical powder, wherein the general chemical formula of the ultrafine metal spherical powder is M. x A y D z M represents Ti, A represents Al, D represents vanadium, 1≤x≤6, 1≤y≤4, 0≤z≤1; the particle size of the ultrafine metal spherical powder is <30μm, and the microstructure of the ultrafine metal spherical powder is spherical;

[0069] The ultrafine metal spherical powder production system includes a reaction unit, a grinding unit, and a spheroidizing unit arranged in sequence;

[0070] The reaction unit includes at least one reaction vessel 2, which provides a reaction site for the preparation of intermediates. The preparation process of intermediates includes reduction reaction and purification. The reduction reaction is the process of generating intermediates and by-products by reducing raw materials under a protective atmosphere. The purification includes distilling by-products to obtain intermediates. The raw materials include potassium fluorotitanate and aluminum powder or potassium fluorotitanate, aluminum powder and aluminum-vanadium alloy powder.

[0071] The grinding unit includes a first hopper 6, a first powder feeder 7 and at least one grinding mechanism arranged in sequence. The grinding mechanism is used to grind the intermediate material and sieve it to obtain fine powder with a particle size of <30μm. The grinding mechanism includes a grinder 8 and a sieve 9. The sieve 9 is provided with a coarse powder outlet and a fine powder outlet. The coarse powder outlet is connected to the first hopper 6 and the fine powder outlet is connected to the spheroidizing unit. The sieve 9 is provided with a filter screen with a mesh size of >480 mesh.

[0072] The spheroidizing unit includes a second hopper 10, a second powder feeder 11 and at least one spheroidizing device 12 arranged in sequence. The spheroidizing device 12 is used to spheroidize fine powder to obtain ultrafine metal spherical powder. The spheroidizing device 12 is a plasma spheroidizing device.

[0073] The ultrafine metal spherical powder production system also includes a gas source 3 and a vacuum unit 15. The vacuum unit 15 is connected to the reaction unit, the grinding unit and the spheroidizing unit respectively, and is used to evacuate the reaction unit, the grinding unit and the spheroidizing unit. The gas source 3 is connected to the reaction unit, the grinding unit and the spheroidizing unit respectively, and is used to provide protective gas for the reaction unit, the grinding unit and the spheroidizing unit.

[0074] In another embodiment of the present invention, the ultrafine metal spherical powder production system further includes a first vacuum packaging unit and / or a second vacuum packaging unit, wherein the first vacuum packaging unit is used to vacuum package the intermediate material, and the second vacuum packaging unit is used to vacuum package the ultrafine metal spherical powder.

[0075] In another embodiment of the present invention, the ultrafine metal spherical powder production system further includes a mixer 1, which is used to mix raw materials;

[0076] In another embodiment of the present invention, the ultrafine metal spherical powder production system further includes a filter 14, which is located between the vacuum unit and the reactor 2 and / or the grinding unit and / or the spheroidizing unit, for filtering out powder entrained in the gas flow.

[0077] Numerous details are explored in the following description to provide a more thorough explanation of embodiments of the present invention; however, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details.

[0078] Example 1

[0079] Please see Figure 1 , Figure 1 This is a schematic diagram of the ultrafine metal spherical powder production system of this embodiment. This system is used to produce ultrafine metal spherical powder, the general chemical formula of which is M. x A y D z M represents Ti, A represents Al, D represents vanadium, 1≤x≤6, 1≤y≤4, 0≤z≤1; the particle size of the ultrafine metal spherical powder is <30μm, and the microstructure of the ultrafine metal spherical powder is spherical. The ultrafine metal spherical powder production system includes a reaction unit, a grinding unit, and a spheroidizing unit arranged sequentially.

[0080] Please continue reading. Figure 1The reaction unit includes at least one reaction vessel 2, which provides a reaction site for preparing intermediates. The preparation process of the intermediates includes a reduction reaction and purification. The reduction reaction is a process in which raw materials (including a mixture of potassium fluorotitanate and aluminum powder or a mixture of potassium fluorotitanate, aluminum powder, and aluminum-vanadium alloy powder) are reduced under a protective atmosphere to generate intermediates and by-products. Purification includes distilling the by-products to obtain the intermediates. For example, when producing Ti using potassium fluorotitanate, aluminum powder, and aluminum-vanadium alloy powder as raw materials, Ti, K3AlF6, and 3K5Al3F6 are obtained through a reduction reaction at a molar ratio of potassium fluorotitanate to aluminum powder of 12:16. 14 A mixture of Ti and 4AlF3, wherein Ti is an intermediate (its particle size does not meet the requirements and its shape is not spherical), reacts with aluminum powder and aluminum vanadium powder to form TC4 (i.e., Ti6Al4V), K3AlF6, and 3K5Al3F. 14 It is a byproduct of 4AlF3, that is:

[0081] 12K2TiF6+16Al=12Ti+3K3AlF6+3K5Al3F 14 +4AlF3;

[0082] When TiAl is produced using potassium fluorotitanate and aluminum powder as raw materials, TiAl, K3AlF6, and 3K5Al3F are obtained through a reduction reaction at a molar ratio of potassium fluorotitanate to aluminum powder of 12:28. 14 A mixture with 4AlF3, wherein TiAl is an intermediate, K3AlF6, and 3K5Al3F 14 It is a byproduct of 4AlF3, that is;

[0083] 12K2TiF6+28Al=12TiAl+3K3AlF6+3K5Al3F 14 +4AlF3;

[0084] When Ti3Al is produced using potassium fluorotitanate and aluminum powder as raw materials, Ti3Al, K3AlF6, and 3K5Al3F are obtained through a reduction reaction at a molar ratio of potassium fluorotitanate to aluminum powder of 12:20. 14 A mixture with 4AlF3, wherein Ti3Al is an intermediate, K3AlF6, and 3K5Al3F... 14 It is a byproduct of 4AlF3, that is;

[0085] 12K2TiF6+20Al=4Ti3Al+3K3AlF6+3K5Al3F 14 +4AlF3;

[0086] The reaction vessel 2 can be a vacuum distillation furnace. For the specific structure of the vacuum distillation furnace, please refer to CN220860674U.

[0087] Please continue reading. Figure 1 The ultrafine metal spherical powder production system also includes a first vacuum packaging unit and / or a second vacuum packaging unit.

[0088] Please continue reading. Figure 1 The first vacuum packaging unit is used to vacuum package the intermediate material, and the second vacuum packaging unit is used to vacuum package the ultrafine metal spherical powder. The first vacuum packaging unit includes a first vacuum packaging machine 4 and a vacuum glove box 5 arranged in sequence. The first vacuum packaging machine 4 is connected to the reaction vessel 2. The second vacuum packaging unit includes a second vacuum packaging machine 13, which is connected to the spheroidizing device 12. A solenoid valve 16 is provided on the pipeline between the second vacuum packaging machine 13 and the spheroidizing device 12.

[0089] Specifically, this embodiment adds a first vacuum packaging unit to vacuum package the intermediate material, preventing it from coming into contact with oxygen in the air during the transfer from the reactor to the grinding mechanism, thus avoiding any adverse effects on the powder's performance. This embodiment also adds a second vacuum packaging unit to vacuum package the obtained ultrafine metal spherical powder, preventing the powder from coming into contact with oxygen in the air during storage, thus avoiding any adverse effects on the powder's performance.

[0090] Please continue reading. Figure 1 The grinding unit includes a first hopper 6, a first powder feeder 7 and at least one grinding mechanism arranged in sequence. The grinding mechanism is used to grind the intermediate material and sieve it to obtain fine powder with a particle size of <30μm. The grinding mechanism includes a grinder 8 and a sieve 9.

[0091] Please continue reading. Figure 1 The first hopper 6 is located inside the vacuum glove box 5. The second end of the first hopper 6 is connected to the first powder feeder 7, which is used to feed the intermediate material from the first hopper 6 into the grinder 8. A solenoid valve 16 is installed on the pipe between the first hopper 6 and the first powder feeder 7. The first hopper 6 is equipped with a vibrating feeding motor (not shown) and a weighing assembly (not shown). The grinder 8 is used to grind the intermediate material. The first end of the grinder 8 is connected to the first powder feeder 7, and the second end of the grinder 8 is connected to a screening machine 9. At least two connecting pipes are provided between the grinder 8 and the first powder feeder 7. All connecting pipes between the grinder 8 and the first powder feeder 7 are corrugated pipes, and all connecting pipes between the grinder 8 and the first powder feeder 7 are equipped with solenoid valves 16. The grinder 8 is equipped with a pressure transmitter 17. The grinder 8 can be a high-energy ball mill, rod mill, etc. High-energy ball mills and rod mills are existing technologies and will not be described further here.

[0092] Specifically, this embodiment provides at least two connecting pipes between the grinder 8 and the first powder feeder 7, ensuring the normal operation of the production system even if one pipe fails. Furthermore, by using corrugated pipes for all connecting pipes between the grinder 8 and the first powder feeder 7, this embodiment avoids the negative impact of vibrations from the grinder 8 during operation on the sealing performance of the pipes, thereby reducing the oxygen content of the finished product.

[0093] Please continue reading. Figure 1 The screening machine 9 is used to screen the material ground by the grinding mill 8 according to its particle size. The first end of the screening machine 9 is connected to the second end of the grinding mill 8. There are at least two connecting pipes between the screening machine 9 and the grinding mill 8. All connecting pipes between the screening machine 9 and the grinding mill 8 are corrugated pipes. Solenoid valves 16 are installed on all connecting pipes between the screening machine 9 and the grinding mill 8. The screening machine 9 has a coarse powder outlet, a fine powder outlet, a pressure transmitter 17, a vibrating feed motor (not shown), and a filter screen (not shown). The mesh size of the filter screen is >480 mesh. The coarse powder outlet is connected to the first hopper 6, and the fine powder outlet is connected to the spheroidizing unit.

[0094] Specifically, this embodiment provides at least two connecting pipes between the grinder 8 and the screening machine 9, ensuring the normal operation of the production system even if one connecting pipe fails. By using a corrugated pipe for the connecting pipe between the grinder 8 and the screening machine 9, this embodiment prevents the vibration of the grinder 8 during operation from negatively impacting the sealing performance of the connecting pipe, thereby reducing the oxygen content of the finished product. Furthermore, by connecting the coarse material outlet of the screening machine 9 to the first silo 6, powder that does not meet the particle size requirements after screening can be returned to the first silo 6 as raw material for further processing, improving resource utilization.

[0095] Please continue reading. Figure 1 The spheroidizing unit includes a second hopper 10, a second powder feeder 11, and at least one spheroidizing device 12 arranged sequentially.

[0096] Please continue reading. Figure 1 The second hopper 10 is equipped with a vibrating feeding motor (not shown) and a weighing assembly (not shown). The first end of the second hopper 10 is connected to the fine material outlet of the screening machine 9, and the second end of the second hopper 10 is connected to the second powder feeder 11. The second powder feeder 11 is used to feed the fine material in the second hopper 10 into the spheroidizing device 12. Solenoid valves 16 are installed on the connecting pipes between the second powder feeder 11 and the second hopper 10, as well as on the connecting pipes between the second powder feeder 11 and the spheroidizing device 12.

[0097] Please continue reading. Figure 1The spheroidizing device 12 is used to spheroidize fine powder to obtain ultrafine metallic spherical powder. The first end of the spheroidizing device 12 is connected to a second powder feeder 11, and the second end is connected to a second vacuum packaging machine 13. The spheroidizing device 12 is equipped with a pressure transmitter 18. The spheroidizing device 12 is a plasma spheroidizing device, which utilizes the high-temperature environment of thermal plasma to change the shape and structure of the sieved powder, thereby obtaining ultrafine metallic spherical powder.

[0098] Please continue reading. Figure 1 The ultrafine metal spherical powder production system also includes an air source 3 and a vacuum unit 15.

[0099] Please continue reading. Figure 1 Vacuum unit 15 is connected to reactor 2, first vacuum packer 4, vacuum glove box 5, first powder feeder 7, grinder 8, sieve 9, second silo 10, second powder feeder 11, spheroidizing equipment 12, and second vacuum packer 13, respectively, for evacuating these components. Gas source 3 is connected to reactor 2, vacuum glove box 5, first powder feeder 7, grinder 8, sieve 9, second silo 10, second powder feeder 11, spheroidizing equipment 12, and second vacuum packer 13, respectively, for supplying gas to reactor 2, vacuum glove box 5, first powder feeder 7, grinder 8, sieve 9, second silo 10, second powder feeder 11, and spheroidizing equipment 12. Argon and other protective gases are provided to the grinding mill 8, screening machine 9, second silo 10, second powder feeder 11 and spheroidizing equipment 12. Solenoid valves 16 are installed on the pipeline between the vacuum unit 15 and the reactor 2 and / or the first vacuum packer 4 and / or the vacuum glove box 5 and / or the first powder feeder 7 and / or the grinding mill 8 and / or the screening machine 9 and / or the second silo 10 and / or the second powder feeder 11 and / or the spheroidizing equipment 12 and / or the second vacuum packer 13. Solenoid valves 16 and pressure transmitters 17 are installed on the pipeline between the gas source 3 and the reactor 2 and / or the vacuum glove box 5 and / or the first powder feeder 7 and / or the grinding mill 8 and / or the screening machine 9 and / or the second silo 10 and / or the second powder feeder 11 and / or the spheroidizing equipment 12.

[0100] The principle of this embodiment is as follows: by connecting the gas source 15 to the reaction unit, grinding unit and spheroidizing unit respectively, protective gas can be provided to the reaction unit, grinding unit and spheroidizing unit, production can be carried out in a protective atmosphere such as argon, and materials can be transported in a protective atmosphere such as argon, reducing the contact between materials and air during the production process, reducing the oxygen content of the obtained ultrafine spherical powder, thereby improving the strength and impact toughness of the ultrafine spherical powder, and realizing semi-automatic production by transporting materials by gas, so as to realize industrial production and increase production capacity.

[0101] Example 2

[0102] Please see Figure 2 The difference between this embodiment and embodiment 1 is that it also includes a mixer 1, which is used to mix raw materials. The mixer 1 is connected to the reactor 2, and a solenoid valve 16 is provided on the pipeline between the mixer 1 and the reactor 2.

[0103] Specifically, in this embodiment, by adding a mixer 1 connected to the reactor 2, the raw materials can be pre-mixed evenly, thereby improving the reaction efficiency of the materials and thus increasing the yield.

[0104] Example 3

[0105] Please see Figure 3 The difference between this embodiment and embodiment 2 is that it also includes a filter 14. The filter 14 is located between the vacuum unit 15 and the reactor 2 and / or the first vacuum packer 4 and / or the vacuum glove box 5 and / or the first powder feeder 7 and / or the grinder 8 and / or the sieve 9 and / or the second hopper 10 and / or the second powder feeder 11 and / or the spheroidizing device 12 and / or the second vacuum packer 13. The filter 14 is used to filter out the powder entrained in the airflow. The filter 14 can be a multi-stage filter. Multi-stage filters are existing technology and will not be described in detail here.

[0106] Specifically, this embodiment adds a filter located between the vacuum unit 15 and the reactor 2 and / or the first vacuum packer 4 and / or the vacuum glove box 5 and / or the first powder feeder 7 and / or the grinder 8 and / or the sieve 9 and / or the second hopper 10 and / or the second powder feeder 11 and / or the spheroidizing device 12 and / or the second vacuum packer 13, which can filter out the powder entrained in the protective gas and avoid the powder from having an adverse effect on production.

[0107] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A system for producing ultrafine metal spherical powder, characterized in that, The microstructure of the ultrafine metal spherical powder is spherical. The ultrafine metal spherical powder production system includes a reaction unit, a grinding unit, and a spheroidizing unit arranged in sequence. The reaction unit includes at least one reaction vessel, which provides a reaction site for the preparation of intermediates. The preparation process of intermediates includes reduction reaction and purification. The reduction reaction is the process of generating intermediates and by-products by reducing raw materials under a protective atmosphere. The purification includes distilling by-products to obtain intermediates. The grinding unit includes at least one grinding mechanism, which is used to grind the intermediate and sieve to obtain fine powder with a particle size of <30μm; The spheroidizing unit includes at least one spheroidizing device, which is used to spheroidize the fine powder to obtain the ultrafine metal spherical powder. The ultrafine metal spherical powder production system also includes a gas source, which is connected to the reaction unit, the grinding unit and the spheroidizing unit respectively, and is used to provide protective gas for the reaction unit, the grinding unit and the spheroidizing unit.

2. The ultrafine metal spherical powder production system as described in claim 1, characterized in that, The ultrafine metal spherical powder production system further includes a first vacuum packaging unit and / or a second vacuum packaging unit. The first vacuum packaging unit is used to vacuum package the intermediate material, and the second vacuum packaging unit is used to vacuum package the ultrafine metal spherical powder.

3. The ultrafine metal spherical powder production system as described in claim 1, characterized in that, The ultrafine metal spherical powder production system also includes a mixer, which is used to mix raw materials.

4. The ultrafine metal spherical powder production system as described in claim 1, characterized in that, The grinding unit includes a first hopper, a first powder feeder, and a grinding mechanism arranged in sequence.

5. The ultrafine metal spherical powder production system as described in claim 1, characterized in that, The spheroidizing unit includes a second hopper, a second powder feeder, and a spheroidizing device arranged in sequence.

6. The ultrafine metal spherical powder production system as described in claim 4, characterized in that, The grinding mechanism includes a grinder and a sieve. The sieve has a coarse powder outlet and a fine powder outlet. The coarse powder outlet is connected to the first silo, and the fine powder outlet is connected to the spheroidizing unit.

7. The ultrafine metal spherical powder production system as described in claim 6, characterized in that, The screening machine is equipped with a filter screen with a mesh size > 480 mesh.

8. The ultrafine metal spherical powder production system as described in claim 1, characterized in that, The ultrafine metal spherical powder production system also includes a vacuum unit, which is connected to the reaction vessel, the grinding unit and the spheroidizing unit respectively, and is used to evacuate the reaction vessel, the grinding unit and the spheroidizing unit.

9. The ultrafine metal spherical powder production system as described in claim 8, characterized in that, The ultrafine metal spherical powder production system also includes a filter, which is located between the vacuum unit and the reactor and / or the grinding unit and / or the spheroidizing unit.

10. The ultrafine metal spherical powder production system as described in claim 1, characterized in that, The spheroidizing device is a plasma spheroidizing device.

Images