Nitrogen atomized aluminum powder production line

Abstract

This invention provides a nitrogen-atomized aluminum powder production line, comprising an atomizing furnace, an atomizing tank, a screw conveyor, a silo pump, and a storage silo, connected sequentially by pipelines. This invention relates to the field of aluminum powder production equipment technology. By using a cleaning unit that can extend and move below the nozzle of the annular atomizer, combined with an auxiliary lifting mechanism driving the reciprocating lifting of the annular atomizer, this invention achieves automatic and precise cleaning of nozzle blockages without manual intervention or downtime, greatly reducing downtime caused by nozzle blockages and improving production efficiency. The spiral scraper on the cleaning unit, in its rotating state, not only effectively removes accumulations inside the nozzle but also efficiently breaks down hard crystalline substances adhering to the inner wall of the nozzle, ensuring thorough and efficient cleaning. This avoids the increased costs and operational inconvenience associated with incomplete cleaning or nozzle replacement that can occur with traditional manual cleaning.

Description

Technical Field

[0001] This invention relates to the field of aluminum powder production equipment technology, and in particular to a nitrogen atomization aluminum powder production line. Background Technology

[0002] The nitrogen atomization aluminum powder production line extrudes high-temperature molten aluminum from a nozzle while simultaneously impacting the aluminum flow with high-speed nitrogen gas, causing the aluminum to rapidly break into tiny droplets. These droplets then cool and solidify quickly in the nitrogen environment, ultimately forming solid aluminum powder.

[0003] In existing nitrogen-atomized aluminum powder production equipment, the nozzles of the atomizers often become clogged during operation. This clogging, occurring to varying degrees, is primarily caused by impurities, oxides, or the solidification of molten aluminum itself at the high-speed nitrogen injection port. Clogged nozzles directly affect the nitrogen injection speed, flow rate, and uniformity, severely interfering with the atomization of aluminum into tiny droplets. This results in a wider particle size distribution, irregular particle shape, and reduced yield in the aluminum powder. Currently, addressing this clogging issue typically requires operators to halt production, open the furnace, manually clean the blockage, or replace the nozzle components. This process is not only cumbersome and time-consuming but also disrupts the production flow, reduces continuous equipment efficiency, and may pose safety risks. Summary of the Invention

[0004] The purpose of this invention is to provide a nitrogen atomization aluminum powder production line. This nitrogen atomization furnace solves the problem of nozzle clogging in existing nitrogen atomization aluminum powder production equipment. This clogging, occurring to varying degrees, is mainly caused by impurities, oxides, or the solidification of molten aluminum itself at the high-speed nitrogen injection port. Once the nozzles become clogged, it directly affects the nitrogen injection speed, flow rate, and uniformity, severely interfering with the atomization of molten aluminum into tiny droplets. This leads to problems such as a wider particle size distribution, irregular particle shape, and reduced yield of the aluminum powder.

[0005] This invention provides a nitrogen-atomized aluminum powder production line, comprising an atomizing furnace, an atomizing tank, a screw conveyor, a silo pump, and a storage silo connected sequentially by pipelines; the atomizing furnace includes a furnace body for forming atomized aluminum powder, an aluminum liquid injection channel for injecting molten aluminum into the furnace body, an annular atomizer for spraying nitrogen into the molten aluminum, an air inlet pipe for supplying nitrogen to the annular atomizer, a cleaning mechanism for periodically cleaning the annular atomizer, two auxiliary lifting mechanisms for driving the annular atomizer to move up and down, and two connecting plates for connecting the atomizer and the auxiliary lifting mechanisms, wherein the auxiliary lifting mechanisms... The lowering mechanism works in conjunction with the cleaning mechanism to clean the annular atomizer. The aluminum liquid injection channel is fixedly installed through the top of the furnace body. The two auxiliary lifting mechanisms are fixedly installed on the top of the furnace body. The annular atomizer is located inside the furnace body and outside the aluminum liquid injection channel. The two connecting plates are fixedly installed on the left and right sides of the annular atomizer. The drive ends of the two auxiliary lifting mechanisms are connected to the two connecting plates. The air inlet pipe is fixedly installed through the top of the furnace body, and one end of the air inlet pipe is connected to the annular atomizer. The cleaning mechanism is fixedly installed on the right side of the furnace body.

[0006] Preferably, the cleaning mechanism includes a clearing unit for clearing the nozzle of the annular atomizer and a lateral moving unit for moving the clearing unit.

[0007] Preferably, the lateral movement unit includes a protective shell, a lead screw, a support base, a first motor, a limiting guide rod, a movable block, and a connecting rod. The protective shell is fixedly disposed between the top and right side of the furnace body, and an opening is provided on the left side of the protective shell. The two ends of the lead screw are respectively connected to the left side of the protective shell and the right side of the furnace body through sealed bearings. The support base is fixedly disposed on the right side of the furnace body, and has two internal cavities. The first motor is fixedly disposed in one of the internal cavities, and the drive end of the first motor is fixedly connected to one end of the lead screw. The limiting guide rod is fixedly disposed between the left side of the protective shell and the right side of the furnace body. The movable block is connected to the lead screw and the limiting guide rod respectively. One end of the connecting rod is fixedly connected to the bottom of the movable block. The unblocking unit is fixedly connected to the other end of the connecting rod, and the unblocking unit can move through the opening on the left side of the protective shell.

[0008] Preferably, the unblocking unit includes a bracket, a support plate, and four unblocking heads. The bracket is fixedly mounted on the other end of the connecting rod, and the support plate is fixedly mounted on the top of the bracket. The four unblocking heads are connected to the support plate by bearings, and the positions of the four unblocking heads correspond to the nozzles on the annular atomizer. Each unblocking head has a spiral scraper on its surface.

[0009] Preferably, the cleaning mechanism further includes a transmission unit disposed on the unclogging head and an execution unit for driving the unclogging head to rotate.

[0010] Preferably, the transmission unit includes four rotating shafts, four sprockets, a chain, a gearbox, and a first bevel gear. The bottom ends of the four rotating shafts are connected to the bottom of the bracket via sealed bearings, and the top end of each rotating shaft is fixedly connected to the bottom end of the corresponding drain head. The four sprockets are fixedly mounted on the four rotating shafts, and the chain meshes with the four sprockets. The gearbox is fixedly disposed on the bottom of the bracket, and the first bevel gear is fixedly disposed on the bottom end of one of the rotating shafts, and the first bevel gear is located inside the gearbox.

[0011] Preferably, the execution unit includes a bearing housing, a rotating outer tube, a second motor, two sliders, a movable inner rod, and a second bevel gear. The bearing housing is fixedly disposed at the bottom of the bracket. The rotating outer tube is connected to the inner ring of the bearing housing. The second motor is fixedly disposed in another inner cavity of the support base, and the drive end of the second motor is fixedly connected to one end of the rotating outer tube. Two sliding grooves are formed on the inner wall of the rotating outer tube. The two sliders are slidably connected to the two sliding grooves. The movable inner rod is fixedly disposed between the two sliders and movably passes through the other end of the rotating outer tube. The movable inner rod is connected to the outer side of the gearbox through a sealed bearing. The second bevel gear is fixedly disposed at one end of the movable inner rod and meshes with the first bevel gear.

[0012] Preferably, the auxiliary lifting mechanism includes a fixed frame, an electric telescopic rod, and a movable rod. The fixed frame is fixedly installed on the top of the furnace body, the electric telescopic rod is fixedly installed on the top of the fixed frame, the movable rod is connected to the top of the furnace body through a linear sealed bearing, and the top end of the movable rod is fixedly connected to the drive end of the electric telescopic rod, and the bottom end of the movable rod is fixedly connected to the top of the connecting plate.

[0013] Preferably, a three-way valve is fixedly installed on the left side of the mounting bracket. The output end of the three-way valve is fixedly connected to the other end of the air inlet pipe, and the two input ends of the three-way valve are respectively connected to a nitrogen input pipe and an air input pipe.

[0014] Preferably, the atomizing can is also connected in sequence to a first tube cooler and a cyclone classifier via pipes. The cyclone classifier is also connected to a dust collector via pipes. The atomizing furnace is also connected to a heat preservation furnace via pipes. The atomizing furnace is also connected in sequence to an air compressor, a first air storage tank, a refrigerated dryer, a nitrogen separation and generation system, a nitrogen storage tank, a second air storage tank, a gas balance tank, a second tube cooler, a precision filter, a precision gas distributor, a nitrogen compressor, a nitrogen buffer tank, and a nitrogen heating furnace via pipes. The dust collector is also connected to an induced draft fan, and the induced draft fan is connected to the gas balance tank via pipes.

[0015] This invention provides an improved nitrogen atomized aluminum powder production line, which, compared to existing technologies, offers the following improvements and advantages: The invention utilizes a clearing unit that extends and moves below the nozzle of the annular atomizer. Combined with an auxiliary lifting mechanism that drives the reciprocating lifting of the annular atomizer, this achieves automatic and precise cleaning of nozzle blockages without manual intervention or downtime, significantly reducing downtime caused by nozzle blockages and improving production efficiency. The spiral scraper on the clearing unit, in its rotating state, not only effectively removes accumulated material from the nozzle but also efficiently breaks down hard crystals adhering to the nozzle's inner wall, ensuring thorough and efficient cleaning. This avoids the increased costs and operational inconvenience associated with incomplete cleaning or nozzle replacement required by traditional manual cleaning. This automatic cleaning method continuously maintains the unobstructed flow of the atomizer nozzle, ensuring the stability and consistency of the nitrogen injection effect, thereby ensuring the stability of the aluminum liquid atomization into powder. This results in a more uniform particle size distribution and more regular particle shape in the produced aluminum powder, improving the overall quality and yield of the aluminum powder. At the same time, it reduces the frequency of operators directly contacting high-temperature equipment and cleaning hazardous areas, improving the safety of the production process and the working environment for operators. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the working process structure of the nitrogen atomized aluminum powder production line of the present invention.

[0018] Figure 2 This is a schematic diagram of the system structure of the nitrogen atomized aluminum powder production line of the present invention;

[0019] Figure 3 This is a schematic diagram of the main structure of the atomizing furnace of the present invention in a non-cleaning state;

[0020] Figure 4 This is a schematic diagram of the main structure of the atomizing furnace of the present invention in a cleaned state;

[0021] Figure 5 This is a front view schematic diagram of the unblocking unit and the transmission unit of the present invention;

[0022] Figure 6 This is a bottom view of the annular atomizer of the present invention.

[0023] Figure 7 This is a top view of the support plate and the unclogging head of the present invention.

[0024] Figure 8 This is a top view of the sprocket and chain of the present invention.

[0025] Figure 9 This is a front view schematic diagram of the rotating outer tube and the movable inner rod of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Atomizing furnace; 11. Furnace body; 12. Aluminum liquid injection channel; 13. Circular atomizer; 14. Air inlet pipe; 15. Cleaning mechanism; 1501. Outer shell; 1502. Lead screw; 1503. Support base; 1504. First motor; 1505. Limiting guide rod; 1506. Movable block; 1507. Connecting rod; 1508. Bracket; 1509. Support plate; 1510. Unclogging head; 1511. Rotating shaft; 1512. Sprocket; 1513. Chain; 1514. Gearbox; 1515. First bevel gear; 1516. Bearing seat; 1517. Rotating outer tube; 1518. Second motor; 1519. Slider; 1520. Movable inner rod; 1521. Second bevel gear; 16. Auxiliary lifting mechanism; 1601. Fixed 1602. Frame; 1603. Electric telescopic pole; 1604. Moving pole; 17. Connecting plate; 2. Atomizing tank; 3. Screw conveyor; 4. Silo pump; 5. Storage silo; 6. Three-way valve; 7. Nitrogen input pipe; 8. Air input pipe; 9. First tube cooler; 100. Cyclone classifier; 101. Dust collector; 102. Insulation furnace; 103. Air compressor; 104. First air storage tank; 105. Refrigerated dryer; 106. Separation nitrogen generation system; 107. Nitrogen storage tank; 108. Second air storage tank; 109. Gas balance tank; 110. Second tube cooler; 111. Precision filter; 112. Precision gas distributor; 113. Nitrogen compressor; 114. Nitrogen buffer tank; 115. Nitrogen heater; 116. Exhaust fan. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Example 1

[0032] Please see Figure 1-9This invention provides a technical solution: a nitrogen-atomized aluminum powder production line, comprising an atomizing furnace 1, an atomizing tank 2, a screw conveyor 3, a silo pump 4, and a storage silo 5 connected sequentially by pipelines; the atomizing furnace 1 includes a furnace body 11 for atomizing aluminum powder forming, the internal space of the furnace body 11 is used to contain molten aluminum and carry out the atomization process, ultimately forming aluminum powder; an aluminum liquid injection channel 12 is used to inject molten aluminum into the furnace body 11, the aluminum liquid injection channel 12 introduces high-temperature molten aluminum from the outside into the interior of the furnace body 11, ensuring that the molten aluminum can smoothly enter the atomization process. The system includes: an annular atomizer 13 for spraying nitrogen into molten aluminum; an annular atomizer 13 surrounding the molten aluminum stream and breaking the molten aluminum into fine droplets through high-speed nitrogen injection to achieve an atomization effect; an air inlet pipe 14 for supplying nitrogen to the annular atomizer 13, which provides power for the atomization process; and a cleaning mechanism 15 for periodically cleaning the annular atomizer 13, which cleans the nozzles of the annular atomizer 13 to prevent aluminum crystallization. To prevent blockage by impurities and ensure a stable atomization effect, two auxiliary lifting mechanisms 16 are used to move the annular atomizer 13 up and down. These mechanisms drive the annular atomizer 13 to move vertically, cooperating with the cleaning mechanism 15 for cleaning. Two connecting plates 17 connect the atomizer and the auxiliary lifting mechanisms 16, wherein the auxiliary lifting mechanisms 16 and the cleaning mechanism 15 work together to clean the annular atomizer 13. The aluminum liquid injection channel 12 is fixedly inserted through the top of the furnace body 11. Mechanism 16 is fixedly installed on the top of the furnace body 11. The annular atomizer 13 is located inside the furnace body 11 and outside the aluminum liquid injection channel 12. The two connecting plates 17 are fixedly installed on the left and right sides of the annular atomizer 13, respectively. The driving ends of the two auxiliary lifting mechanisms 16 are connected to the two connecting plates 17. The air inlet pipe 14 is fixedly installed through the top of the furnace body 11, and one end of the air inlet pipe 14 is connected to the annular atomizer 13. The cleaning mechanism 15 is fixedly installed on the right side inside the furnace body 11.

[0033] Specifically, the cleaning mechanism 15 includes a clearing unit for clearing the nozzles of the annular atomizer 13 and a lateral moving unit for moving the clearing unit. The clearing unit can clear any blockages that may appear inside the nozzles of the annular atomizer 13, keeping the nozzles unobstructed and ensuring the normal operation of the atomization process. The lateral moving unit can drive the clearing unit to move horizontally, so that the clearing unit reaches directly below the nozzles of the annular atomizer 13, thereby cleaning the nozzles.

[0034] Specifically, the lateral movement unit includes a protective shell 1501, a lead screw 1502, a support base 1503, a first motor 1504, a limiting guide rod 1505, a movable block 1506, and a connecting rod 1507. The protective shell 1501 is fixedly installed between the top and right side of the furnace body 11, and an opening is provided on the left side of the protective shell 1501. The protective shell 1501 forms an installation and protection area within the furnace body 11, and avoids the spray range of the annular atomizer 13 to prevent affecting the spray effect of the annular atomizer 13. The two ends of the lead screw 1502 are connected to the left side of the protective shell 1501 and the right side of the furnace body 11 respectively through sealed bearings. The support base 1503... The first motor 1504 is fixedly installed on the right side of the furnace body 11, and has two internal cavities. The first motor 1504 is fixedly installed in one of the internal cavities, and the driving end of the first motor 1504 is fixedly connected to one end of the lead screw 1502. The first motor 1504 is used to drive the lead screw 1502. The limiting guide rod 1505 is fixedly installed between the left side of the protective shell 1501 and the right side of the furnace body 11. The movable block 1506 is connected to the lead screw 1502 and the limiting guide rod 1505 respectively. One end of the connecting rod 1507 is fixedly connected to the bottom of the movable block 1506. The unblocking unit is fixedly connected to the other end of the connecting rod 1507, and the unblocking unit can be moved through the opening on the left side of the protective shell 1501.

[0035] In the non-working state, the unblocking unit is located inside the protective shell to prevent the unblocking unit from affecting the normal operation of the annular atomizer 13. In the working state, the lateral moving unit drives the unblocking unit to move directly below the annular atomizer 13.

[0036] Specifically, the unblocking unit includes a bracket 1508, a support plate 1509, and four unblocking heads 1510. The bracket 1508 is fixedly mounted on the other end of the connecting rod 1507, and the support plate 1509 is fixedly mounted on the top of the bracket 1508. The four unblocking heads 1510 are connected to the support plate 1509 through sealed bearings, and the positions of the four unblocking heads 1510 correspond to the positions of the nozzles on the annular atomizer 13, ensuring that each unblocking head 1510 can accurately reach and act on the corresponding nozzle to achieve efficient cleaning. The surface of each unblocking head 1510 is provided with a spiral scraper. The special spiral scraper design can more effectively scrape off aluminum slag or impurities attached to the inside of the nozzle.

[0037] Specifically, the cleaning mechanism 15 also includes a transmission unit mounted on the unclogging head 1510 and an execution unit for driving the unclogging head 1510 to rotate. The transmission unit can transmit the driving force of the execution unit to the unclogging head 1510, so that each unclogging head 1510 can rotate during unclogging. This rotational movement allows the spiral scraper blades on the surface of the unclogging head 1510 to more comprehensively contact the inner wall of the nozzle. During the rotation of the unclogging head 1510 during unclogging, it works in conjunction with the auxiliary lifting mechanism 16 to rotate and clean the nozzle up and down. The auxiliary lifting mechanism 16 drives the unclogging head 1510 to move up and down, and combined with the rotation of the unclogging head 1510, it forms an all-round cleaning action. It can break down the crystals on the nozzle inside the annular atomizer 13. During the rotation and up and down movement, the spiral scraper blades generate strong shearing and impact forces on the crystals, effectively breaking them down and removing them. This greatly improves the cleaning effect. This multi-dimensional and multi-action cleaning method ensures that the nozzle can be thoroughly cleaned and restored to its normal working state.

[0038] Specifically, the transmission unit includes four rotating shafts 1511, four sprockets 1512, a chain 1513, a gearbox 1514, and a first bevel gear 1515. The bottom ends of the four rotating shafts 1511 are connected to the bottom of the bracket 1508 via sealed bearings, and the top end of each rotating shaft 1511 is fixedly connected to the bottom end of the corresponding unclogging head 1510. The four sprockets 1512 are respectively fixedly mounted on the four rotating shafts 1511. The chain 1513 meshes with the four sprockets 1512, and the meshing transmission of the chain 1513 can drive one of the rotating shafts. The rotational power of shaft 1511 is synchronously transmitted to the other three shafts 1511, realizing the synchronous rotation of the four unclogging heads 1510. The gearbox 1514 is fixedly installed on the bottom of the bracket 1508. The first bevel gear 1515 is fixedly installed at the bottom end of one of the shafts 1511, and the first bevel gear 1515 is located inside the gearbox 1514. The gearbox 1514 provides protection for the internal first bevel gear 1515. As a key component for power input, the first bevel gear 1515 is connected to the external actuator, receives the driving force and transmits it to the shaft 1511 to start the entire transmission unit.

[0039] Specifically, the execution unit includes a bearing housing 1516, a rotating outer tube 1517, a second motor 1518, two sliders 1519, a movable inner rod 1520, and a second bevel gear 1521. The bearing housing 1516 is fixedly disposed at the bottom of the bracket 1508. The rotating outer tube 1517 is connected to the inner ring of the bearing housing 1516. The second motor 1518 is fixedly disposed in another inner cavity of the support base 1503, and the driving end of the second motor 1518 is fixedly connected to one end of the rotating outer tube 1517. The second motor 1518 can drive the rotating outer tube 1517 to rotate. The bearing housing 1516 provides support for the rotation of the rotating outer tube 1517. Two sliding grooves are formed on the inner wall of the rotating outer tube 1517. The two sliders 1519 are slidably connected to the two sliding grooves. The movable inner rod 1520 is fixed. The movable inner rod 1520 is positioned between the two sliders 1519 and extends through the other end of the rotating outer tube 1517. The movable inner rod 1520 can move laterally in a straight line within the groove of the rotating outer tube 1517 via the sliders 1519. The movable inner rod 1520 is connected to the outer side of the gearbox 1514 via a sealed bearing. The second bevel gear 1521 is fixedly positioned at one end of the movable inner rod 1520 and meshes with the first bevel gear 1515. When the lateral movement unit drives the unblocking unit to move, the gearbox 1514 can drive the movable inner rod 1520 to move synchronously, ensuring that the second bevel gear 1521 and the first bevel gear 1515 are always in a meshing state, and ensuring that the execution unit can always transmit rotational power to the first bevel gear 1515 through the second bevel gear 1521.

[0040] Specifically, the auxiliary lifting mechanism 16 includes a fixed frame 1601, an electric telescopic rod 1602, and a moving rod 1603. The fixed frame 1601 is fixedly installed on the top of the furnace body 11. The electric telescopic rod 1602 is fixedly installed on the top of the fixed frame 1601. The moving rod 1603 is connected to the top of the furnace body 11 through a linear sealed bearing, and the top end of the moving rod 1603 is fixedly connected to the drive end of the electric telescopic rod 1602. The linear sealed bearing ensures that the moving rod 1603 can smoothly perform vertical lifting and lowering movements under the action of the electric telescopic rod 1602, while reducing friction and preventing heat leakage. The bottom end of the moving rod 1603 is fixedly connected to the top of the connecting plate 17. The electric telescopic rod 1602 can transmit the telescopic movement to the annular atomizer 13 through the moving rod, so that the annular atomizer 13 can be lifted and lowered during cleaning. The section of the air inlet pipe 14 located inside the furnace body 11 is a metal telescopic pipe, which can be adjusted accordingly to the movement of the electric telescopic rod 1602.

[0041] Specifically, a three-way valve 6 is fixedly installed on the left side of the mounting bracket 1601. The output end of the three-way valve 6 is fixedly connected to the other end of the air inlet pipe 14. The two input ends of the three-way valve 6 are respectively connected to a nitrogen inlet pipe 7 and an air inlet pipe 8. The nitrogen inlet pipe 7 is used to introduce high-pressure nitrogen. During normal production, high-pressure nitrogen is provided through the nitrogen inlet pipe 7 to atomize the molten aluminum. During the cleaning process, the three-way valve 6 is switched to the air inlet pipe 8. The operator switches the three-way valve 6 to connect the air source. After air is introduced, the crystals and impurities cleaned from the nozzle of the annular atomizer 13 can be blown out of the annular atomizer 13. The airflow effectively discharges these cleaned substances, keeping the nozzle unobstructed.

[0042] Working principle:

[0043] Aluminum powder production process

[0044] At the start of production, high-temperature molten aluminum flows into the atomizing furnace 1 through the molten aluminum injection channel 12 at the top of the furnace body 11. The annular atomizer 13, located outside the molten aluminum stream, receives nitrogen gas through the air inlet pipe 14. The high-speed jet of nitrogen gas breaks the molten aluminum into tiny droplets, which are rapidly cooled and solidified inside the furnace body 11 to form aluminum powder.

[0045] Cleanup agency 15 launched

[0046] When the nozzles of the annular atomizer 13 need to be cleaned, the first motor 1504 in the lateral movement unit drives the lead screw 1502 to rotate. The lead screw 1502 drives the movable block 1506 to move horizontally along the limiting guide rod 1505 via a thread. The connecting rod 1507 at the bottom of the movable block 1506 moves accordingly, and the unclogging unit fixed at the other end of the connecting rod 1507 can move horizontally at the opening of the protective shell 1501, ensuring that the unclogging head 1510 of the unclogging unit moves accurately to the bottom of the annular atomizer 13, so that each unclogging head 1510 corresponds to each nozzle of the annular atomizer 13.

[0047] Synchronous transmission

[0048] Meanwhile, when the lateral moving unit drives the unblocking unit to move, the gearbox 1514 can drive the movable inner rod 1520 to move synchronously, ensuring that the second bevel gear 1521 and the first bevel gear 1515 are always in mesh, and ensuring that the execution unit can always transmit rotational power to the first bevel gear 1515 through the second bevel gear 1521.

[0049] Auxiliary lifting mechanism 16 working

[0050] The electric telescopic rod 1602 inside the auxiliary lifting mechanism 16 extends and retracts. The moving rod 1603 connected to its drive end moves smoothly up and down in the guide sleeve through a linear sealed bearing. The connecting plate 17 connected to the bottom end of the moving rod 1603 drives the annular atomizer 13 to move up and down. During the lifting and lowering process of the annular atomizer 13, the unclogging head 1510 will repeatedly enter its nozzle to unclog the nozzle.

[0051] 1510 Rotary Cleaning Head

[0052] Meanwhile, within the execution unit, the second motor 1518 drives the rotating outer tube 1517. Due to the limiting effect of the slider 1519 and the slide groove, the rotating outer tube 1517 drives the movable inner rod 1520 to rotate synchronously, and the movable inner rod 1520 drives the second bevel gear 1521 to rotate. The second bevel gear 1521 drives the meshing first bevel gear 1515 to rotate, and the first bevel gear 1515 drives one of the rotating shafts 1511 to rotate. Under the transmission of the chain 1513, the four sprockets 1512 synchronously drive the four unclogging heads 1510 to rotate simultaneously. As they rotate, the spiral scrapers on their surfaces scrape and break up the inside of the nozzles, removing the attached crystals and impurities.

[0053] Air purge cleaning

[0054] At the same time, the three-way valve 6 has been switched to the air input pipe 8, and high-pressure air enters the annular atomizer 13 from the air inlet pipe 14, blowing the cleaned debris and impurities out of the nozzle.

[0055] Collaborative cleaning effect

[0056] The entire process, through the coordinated actions of lateral movement, vertical lifting and lowering, and the rotation of the unblocking head 1510, as well as the purging of air, achieves a thorough cleaning of the nozzle of the annular atomizer 13.

[0057] Example 2

[0058] Specifically, the atomizing canister 2 is also connected in sequence to a first tube cooler 9 and a cyclone classifier 100 via pipes. The cyclone classifier 100 is also connected to a dust collector 101 via pipes. The atomizing furnace 1 is also connected to a heat preservation furnace 102 via pipes. The atomizing furnace 1 is also connected in sequence to an air compressor 103, a first air storage tank 104, a refrigerated dryer 105, a nitrogen separation and generation system 106, a nitrogen storage tank 107, a second air storage tank 108, a gas balance tank 109, a second tube cooler 110, a precision filter 111, a precision gas distributor 112, a nitrogen compressor 113, a nitrogen buffer tank 114, and a nitrogen heating furnace 115 via pipes. The dust collector 101 is also connected to an induced draft fan 116, which is connected to the gas balance tank 109 via pipes.

[0059] The entire aluminum powder production process begins with the treatment of molten electrolytic aluminum. First, the molten aluminum is electrically heated to raise its temperature before being fed into a 17-ton external melting furnace. In the external melting furnace, refining agents are added to treat the molten aluminum, removing impurities or adjusting its composition. After treatment, the purified molten aluminum flows into a 2-ton holding furnace 102, where it is maintained at a stable temperature in preparation for subsequent atomization.

[0060] Meanwhile, another independent gas processing flow is also underway. Air compressor 103 generates compressed air, which is then pressure-stabilized in the first air storage tank 104, de-oiled by a purification oil-water separator, deeply dried in a refrigerated dryer 105, and then pressure-stabilized again in the second air storage tank 108 before entering the nitrogen separation and generation system 106. This system separates high-purity nitrogen and discharges waste gas. The generated nitrogen first enters the nitrogen storage tank 107 and gas balance tank 109 for storage and pressure stabilization, then undergoes treatment with an electrostatic eliminator, cooling in the second tube cooler 110, and deep purification and precise distribution through a precision filter 111 and a precision gas distributor 112. A portion of the nitrogen is also pressurized by the nitrogen compressor 113, stored in the nitrogen buffer tank 114, and heated to a suitable temperature as needed by a high-pressure nitrogen heater 115.

[0061] Two prepared material streams—molten aluminum from holding furnace 102 and rigorously treated and heated nitrogen—converge in nitrogen atomizing furnace 1. The molten aluminum is rapidly broken into fine droplets by the impact and shearing action of the high-speed nitrogen flow. These droplets undergo sedimentation and preliminary cooling in the atomization chamber, forming solid or semi-solid aluminum powder particles.

[0062] The initially cooled aluminum powder is then conveyed via screw conveyor 3 and silo pump 4. During conveying or subsequent processes, the aluminum powder undergoes further cooling in the first tube cooler 9 to ensure a suitable temperature. The cooled aluminum powder is then temporarily stored in storage silo 5. The aluminum powder exiting storage silo 5 enters cyclone classifier 100 for initial particle size classification. The classified aluminum powder then undergoes finer particle size screening using external screening equipment. Fine dust generated during the screening process is collected and treated by dust collector 101. Finally, the qualified aluminum powder product is packaged and stored in a warehouse.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nitrogen-atomized aluminum powder production line, comprising an atomizing furnace (1), an atomizing tank (2), a screw conveyor (3), a silo pump (4), and a storage silo (5) connected sequentially by pipelines; characterized in that, The atomizing furnace (1) includes a furnace body (11) for atomizing aluminum powder, an aluminum liquid injection channel (12) for injecting molten aluminum into the furnace body (11), an annular atomizer (13) for spraying nitrogen into the molten aluminum, an air inlet pipe (14) for supplying nitrogen to the annular atomizer (13), a cleaning mechanism (15) for periodically cleaning the annular atomizer (13), two auxiliary lifting mechanisms (16) for driving the annular atomizer (13) to move up and down, and two connecting plates (17) for connecting the atomizer and the auxiliary lifting mechanisms (16). The auxiliary lifting mechanisms (16) and the cleaning mechanisms (15) work together to clean the annular atomizer (13). The channel (12) is fixedly inserted through the top of the furnace body (11), the two auxiliary lifting mechanisms (16) are fixedly installed on the top of the furnace body (11), the annular atomizer (13) is located inside the furnace body (11) and outside the aluminum liquid injection channel (12), the two connecting plates (17) are fixedly installed on the left and right sides of the annular atomizer (13), the driving ends of the two auxiliary lifting mechanisms (16) are connected to the two connecting plates (17), the air inlet pipe (14) is fixedly inserted through the top of the furnace body (11), and one end of the air inlet pipe (14) is connected to the annular atomizer (13), and the cleaning mechanism (15) is fixedly installed on the right side inside the furnace body (11); The cleaning mechanism (15) includes a clearing unit for clearing the nozzle of the annular atomizer (13) and a lateral moving unit for moving the clearing unit. The unblocking unit includes a bracket (1508), a support plate (1509), and four unblocking heads (1510). The bracket (1508) is fixedly installed at the other end of the connecting rod (1507), and the support plate (1509) is fixedly installed at the top of the bracket (1508). The four unblocking heads (1510) are connected to the support plate (1509) by bearings, and the positions of the four unblocking heads (1510) correspond to the positions of the nozzles on the annular atomizer (13). Each unblocking head (1510) has a spiral scraper on its surface. The cleaning mechanism (15) also includes a transmission unit disposed on the unblocking head (1510) and an execution unit for driving the unblocking head (1510) to rotate.

2. The nitrogen atomized aluminum powder production line according to claim 1, characterized in that, The lateral movement unit includes a protective shell (1501), a lead screw (1502), a support base (1503), a first motor (1504), a limiting guide rod (1505), a movable block (1506), and a connecting rod (1507). The protective shell (1501) is fixedly installed between the top and right side of the furnace body (11), and an opening is provided on the left side of the protective shell (1501). The two ends of the lead screw (1502) are respectively connected to the left side of the protective shell (1501) and the right side of the furnace body (11) through sealed bearings. The support base (1503) is fixedly installed on the right side of the furnace body (11), and has two internal cavities. The first motor (1504) is fixedly installed in one of the inner cavities, and the driving end of the first motor (1504) is fixedly connected to one end of the lead screw (1502). The limiting guide rod (1505) is fixedly installed between the left side of the protective shell (1501) and the right side of the furnace body (11). The movable block (1506) is connected to the lead screw (1502) and the limiting guide rod (1505) respectively. One end of the connecting rod (1507) is fixedly connected to the bottom of the movable block (1506). The unblocking unit is fixedly connected to the other end of the connecting rod (1507), and the unblocking unit can be moved through the opening on the left side of the protective shell (1501).

3. The nitrogen atomized aluminum powder production line according to claim 2, characterized in that, The transmission unit includes four rotating shafts (1511), four sprockets (1512), a chain (1513), a gearbox (1514), and a first bevel gear (1515). The bottom ends of the four rotating shafts (1511) are connected to the bottom of the bracket (1508) through sealed bearings, and the top end of each rotating shaft (1511) is fixedly connected to the bottom end of the corresponding unclogging head (1510). The four sprockets (1512) are fixedly mounted on the four rotating shafts (1511). The chain (1513) meshes with the four sprockets (1512). The gearbox (1514) is fixedly installed on the bottom of the bracket (1508). The first bevel gear (1515) is fixedly installed on the bottom end of one of the rotating shafts (1511) and is located inside the gearbox (1514).

4. The nitrogen atomized aluminum powder production line according to claim 3, characterized in that, The execution unit includes a bearing housing (1516), a rotating outer tube (1517), a second motor (1518), two sliders (1519), a movable inner rod (1520), and a second bevel gear (1521). The bearing housing (1516) is fixedly installed at the bottom of the bracket (1508). The rotating outer tube (1517) is connected to the inner ring of the bearing housing (1516). The second motor (1518) is fixedly installed in another inner cavity of the support base (1503), and the driving end of the second motor (1518) is fixedly connected to one end of the rotating outer tube (1517). The inner wall of the rotating outer tube (1517) has two sliding grooves, and the two sliders (1519) are slidably connected to the two sliding grooves. The movable inner rod (1520) is fixedly disposed between the two sliders (1519), and the movable inner rod (1520) movably passes through the other end of the rotating outer tube (1517). The movable inner rod (1520) is connected to the outer side of the gearbox (1514) through a sealed bearing. The second bevel gear (1521) is fixedly disposed at one end of the movable inner rod (1520), and the second bevel gear (1521) meshes with the first bevel gear (1515).

5. The nitrogen atomized aluminum powder production line according to claim 4, characterized in that, The auxiliary lifting mechanism (16) includes a fixed frame (1601), an electric telescopic rod (1602), and a moving rod (1603). The fixed frame (1601) is fixedly installed on the top of the furnace body (11). The electric telescopic rod (1602) is fixedly installed on the top of the fixed frame (1601). The moving rod (1603) is connected to the top of the furnace body (11) through a linear sealed bearing. The top end of the moving rod (1603) is fixedly connected to the drive end of the electric telescopic rod (1602). The bottom end of the moving rod (1603) is fixedly connected to the top of the connecting plate (17).

6. The nitrogen atomized aluminum powder production line according to claim 5, characterized in that, A three-way valve (6) is fixedly installed on the left side of the fixed frame (1601). The output end of the three-way valve (6) is fixedly connected to the other end of the air inlet pipe (14). The two input ends of the three-way valve (6) are respectively connected to a nitrogen input pipe (7) and an air input pipe (8).

7. The nitrogen atomized aluminum powder production line according to claim 6, characterized in that, The atomizing tank (2) is also connected in sequence to a first tube cooler (9) and a cyclone classifier (100) via pipes. The cyclone classifier (100) is also connected to a dust collector (101) via pipes. The atomizing furnace (1) is also connected to a heat preservation furnace (102) via pipes. The atomizing furnace (1) is also connected in sequence to an air compressor (103), a first air storage tank (104), a refrigerated dryer (105), and a nitrogen separation system (106) via pipes. The system includes a nitrogen storage tank (107), a second air storage tank (108), a gas balance tank (109), a second tube cooler (110), a precision filter (111), a precision gas distributor (112), a nitrogen compressor (113), a nitrogen buffer tank (114), and a nitrogen heater (115). The dust collector (101) is also connected to an induced draft fan (116), which is connected to the gas balance tank (109) via a pipeline.

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