A gas atomization preparation process and device for light steel powder

Abstract

The present invention discloses a gas atomization preparation process and device for light steel powder, including a workbench, a sleeve fixedly sleeved on the surface of the workbench, a discharge barrel fixedly connected to the opposite end of a connecting rod, a cleaning mechanism arranged between the sleeve and the discharge barrel, a smelting mechanism arranged on the top of the sleeve, and an atomization mechanism arranged in the inner cavity of the sleeve, and the present invention relates to the field of metal powder making technology. The gas atomization preparation process and device for light steel powder solves the problem that due to the large impact force, the broken metal droplets will splash, so a small amount of metal droplets will contact the inner wall of the equipment without cooling, and will stick to the inner wall with rapid cooling, making it impossible to clean. In addition, the gas atomization method equipment includes a separate system operation to pour the molten metal into a heat-insulating crucible after smelting, so the operating mechanism is added again, which makes the overall structure complicated and also increases the overall equipment volume.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder making, and in particular to a gas atomization preparation process and device for lightweight steel powder. Background Art

[0002] Gas atomization is a near-net-shape forming technology. The powder produced by this method is of high purity, which effectively avoids the contamination of the melt by the ceramic crucible under the conventional gas atomization method. At the same time, the powder particle size distribution is wide, and the yield of fine powder (not greater than 53 nm) is high, and the sphericity is good. It is suitable for the preparation of refractory active metals such as titanium and zirconium and their alloy powders. This gas atomization technology is particularly suitable for additive manufacturing (powder bed melting process) and injection molding processes because the fine powder yield can reach more than 40%.

[0003] However, in the gas atomization equipment, when the high-pressure inert gas impacts and breaks the metal liquid to make it atomized into fine metal droplets, the broken metal droplets will splash due to the relatively large impact force. Therefore, a small amount of metal droplets will contact the inner wall of the equipment without cooling. As they are quickly cooled, they will stick to the inner wall, making it impossible to clean them. In addition, the gas atomization equipment also requires a separate system operation to pour the metal liquid into the insulation crucible after smelting. Therefore, the operating mechanism is increased again, which makes the overall structure complicated and increases the volume of the overall equipment. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a lightweight steel powder gas atomization preparation process and device, which solves the problem that due to the large impact force, the broken metal droplets will splash, so that a small amount of metal droplets will contact the inner wall of the equipment without cooling, and will stick to the inner wall with rapid cooling, making it impossible to clean. In addition, the gas atomization equipment includes a separate system operation to pour the molten metal into an insulating crucible after smelting, so the operating mechanism is increased again, which makes the overall structure complicated and also increases the overall equipment volume.

[0005] To achieve the above objectives, the present invention is implemented through the following technical scheme: a lightweight steel powder aerosol preparation device, comprising a workbench, a sleeve is fixedly sleeved on the surface of the workbench, an exhaust pipe is fixedly connected to the surface of the upper end of the sleeve, a connecting rod 1 is symmetrically fixedly connected to the bottom of the workbench, and a discharge barrel is fixedly connected to the opposite end of the connecting rod 1, a valve is provided at the bottom of the discharge barrel, a collecting box is provided below the valve, a cleaning mechanism is provided between the sleeve and the discharge barrel, a smelting mechanism is provided on the top of the sleeve, and an atomizing mechanism is provided in the inner cavity of the sleeve.

[0006] The cleaning mechanism includes a servo motor and a pulling rod fixedly installed at the bottom of the workbench through a sleeve plate, the output end of the sleeve plate is fixedly connected to a rotating shaft, and the surface of the rotating shaft is respectively fixedly sleeved with a first gear and a third gear, the surface of the first gear is meshingly connected with the second gear, and the port of the inner cavity of the second gear is fixedly connected with a scraper, the front and back sides of the second gear are fixedly provided with a limiting groove, the surface of the rotating shaft is rotatably sleeved with a bearing sleeve, the surface of the pulling rod is provided with a gear bar, one end of the pulling rod is fixedly connected to a sliding plate, and the top of the sliding plate is fixedly connected to the sliding plate, and one end of the sliding plate is fixedly connected to a spring.

[0007] The pulling rod is slidably sleeved in the inner cavity of the sleeve, and one end is located outside the sleeve, the bearing sleeve is fixedly connected to the surface of the sleeve, the sliding plate is slidably sleeved in the port of the inner cavity of the sleeve, and one end is against the port, one end of the spring is fixedly connected to the inner wall of the sleeve interlayer, the first gear and the second gear and the third gear are meshed with the gear bar, and the opposite end of the sleeve and the discharging barrel is slidably sleeved in the inner cavity of the limiting groove through a limiting block, and is consistent with the front and back sides of the second gear.

[0008] Preferably, the atomization mechanism includes an insulating crucible fixedly connected to the inner wall of the sleeve, the surface of the insulating crucible is symmetrically fixedly connected to a support rod, the inner wall of the insulating crucible is fixedly connected to a filter screen, the bottom of the insulating crucible is symmetrically fixedly connected to an atomizing nozzle, one end of the atomizing nozzle is fixedly connected to an annular tube, and the surface of the annular tube is fixedly connected to a connecting tube.

[0009] Preferably, one end of the support rod is fixedly connected to the inner wall of the sleeve, the heat-insulating crucible is funnel-shaped, and the annular tube is fixedly sleeved on the surface of the sleeve.

[0010] Preferably, the atomizing nozzle is inclined and penetrates the inner wall of the sleeve.

[0011] Preferably, the smelting mechanism includes two fixed plates fixedly installed on the top of the workbench, the top of the fixed plate is fixedly connected to a connecting rod 2, the top of the connecting rod 2 is fixedly connected to a connecting plate, the surface of the connecting plate is fixedly sleeved with a hydraulic cylinder, the telescopic end of the hydraulic cylinder is fixedly installed on the top of the cover plate, and heating rods are symmetrically arranged on the bottom of the cover plate.

[0012] Preferably, the fixing plate is L-shaped, and one end is fixedly mounted on the surface of the sleeve, the surface of the cover plate matches the port at the top of the sleeve, and the heating rod is located in the inner cavity at the upper end of the sleeve.

[0013] Preferably, the rotating shaft passes through the top of the workbench and extends outside the top of the workbench, and the scraper and the inner wall of the discharge barrel are in contact with each other.

[0014] The present invention also discloses a gas atomization preparation process of lightweight steel powder, comprising the following steps:

[0015] S1, melting, putting metal lightweight steel into the inner cavity of the sleeve, driving the cover plate up and down through the telescopic end of the hydraulic cylinder to close the cover plate, and then evacuating the vacuum through the exhaust pipe, and then melting the lightweight steel into liquid metal through the heating rod;

[0016] S2, atomization, then the output end of the servo motor drives the rotating shaft to rotate, so that the third gear is meshed and connected with the gear bar, and drives the pulling rod to move outward, and the sliding plate slides to open the port, so that the molten metal flows out from the opened port and falls into the inner cavity of the heat-insulating crucible, wherein the filter screen filters the impurities of the molten metal, and falls freely with the outlet. At the same time, high-pressure inert gas is introduced into the atomizing nozzle through the connecting pipe, and is accelerated through the Laval structure cavity to form a supersonic airflow, which impacts and breaks the molten metal falling into the atomization area, atomizes it into fine metal droplets, and quickly cools and solidifies it into metal powder, and drips into the inside of the discharge barrel;

[0017] At the same time, the first gear is meshed with the second gear, so that the second gear drives the scraper to rotate along the inner wall of the discharge barrel, and the metal powder remaining on the inner wall of the discharge barrel is cleaned up when the metal liquid in the atomization area is impacted and crushed;

[0018] S3, collect, then open the valve to allow the cooled, solidified and removed metal powder to be transferred into the collection box for collection. Beneficial Effects

[0019] The present invention provides a gas atomization preparation process and device for lightweight steel powder. Compared with the prior art, it has the following beneficial effects:

[0020] 1. The light steel powder gas atomization preparation process and device, by making the output end of the servo motor drive the rotating shaft to rotate, so that the first gear is meshed and connected with the second gear, and the second gear drives the scraper to rotate along the inner wall of the discharge barrel, so that the metal liquid in the atomization area is splashed on the inner wall of the discharge barrel and the residual metal powder is cleaned when the impact crushes the metal liquid in the atomization area.

[0021] 2. The light steel powder gas atomization preparation process and device, by making the output end of the servo motor drive the rotating shaft to rotate, so that the third gear is meshed and connected with the gear bar, and drives the pulling rod to move outward, and the sliding plate slides to open the port, so that the molten metal flows out from the opened port, thereby realizing the entry and closing of the molten metal after smelting on the basis of cleaning, reducing the additional operating mechanism of the traditional smelting pouring atomization system, simplifying the structure, and reducing the size of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a partial cross-sectional view of the structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the melting mechanism of the structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the atomization mechanism of the present invention;

[0026] Figure 5 It is a schematic diagram of the cleaning mechanism of the structure of the present invention;

[0027] Figure 6 The structure of the present invention Figure 5 A partial enlarged view of the middle part;

[0028] Figure 7 This is a schematic diagram of the second gear of the structure of the present invention.

[0029] In the figure: 1. workbench; 2. sleeve; 3. discharge barrel; 4. connecting rod; 5. valve; 6. collecting box; 7. smelting mechanism; 71. cover plate; 72. hydraulic cylinder; 73. connecting plate; 74. fixing plate; 75. heating rod; 76. connecting rod; 8. atomizing mechanism; 81. insulation crucible; 82. filter screen; 83. support rod; 84. atomizing nozzle; 85. connecting pipe; 86. annular pipe; 9. cleaning mechanism; 91. servo motor; 92. sleeve plate; 93. rotating shaft; 94. first gear; 95. second gear; 951. limiting groove; 96. scraper; 97. bearing sleeve; 98. pulling rod; 99. spring; 910. sliding plate; 911. connecting strip; 912. gear strip; 913. third gear; 10. exhaust pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-2The embodiment of the present invention provides a technical solution: a light steel powder aerosol preparation device, comprising a workbench 1, a sleeve 2 is fixedly sleeved on the surface of the workbench 1, an upper surface of the sleeve 2 is fixedly connected with an exhaust pipe 10, a connecting rod 4 is symmetrically fixedly connected to the bottom of the workbench 1, and a discharge barrel 3 is fixedly connected to the opposite end of the connecting rod 4, a valve 5 is arranged at the bottom of the discharge barrel 3, a collecting box 6 is arranged below the valve 5, a cleaning mechanism 9 is arranged between the sleeve 2 and the discharge barrel 3, a smelting mechanism 7 is arranged at the top of the sleeve 2, an atomizing mechanism 8 is arranged in the inner cavity of the sleeve 2, the smelting mechanism 7 is used to realize the smelting of light steel to form molten metal, and the atomizing mechanism 8 is used to atomize the molten metal to form metal powder, and the cleaning mechanism 9 is used to realize the collection of the metal powder on the inner wall and open the port of the smelting mechanism 7, and then the valve 5 is opened to allow the cooled, solidified and cleared metal powder to be transferred into the collecting box 6 for collection.

[0032] See also Figure 5-7 The cleaning mechanism 9 includes a servo motor 91 and a pull rod 98 fixedly mounted on the bottom of the workbench 1 through a sleeve plate 92. The output end of the sleeve plate 92 is fixedly connected to a rotating shaft 93, which passes through the top of the workbench 1 and extends outside the top of the workbench 1. The surfaces of the rotating shaft 93 are respectively fixedly sleeved with a first gear 94 and a third gear 913. The surface of the first gear 94 is meshingly connected with a second gear 95, and a scraper 96 is fixedly connected to the port of the inner cavity of the second gear 95. The scraper 96 fits the inner wall of the discharge barrel 3. The front and back surfaces of the second gear 95 are fixedly provided with a limiting groove 951. The surface of the rotating shaft 93 is rotatably sleeved with a bearing sleeve 97, which is meshed and connected with the second gear 95 through the first gear 94, so that the second gear 95 drives the scraper 96 to rotate along with the inner wall of the discharge barrel 3, so that the metal liquid in the atomization zone splashes on the inner wall of the discharge barrel 3 and the residual metal powder is cleaned when the metal liquid in the atomization zone is impacted and crushed.

[0033] In the present embodiment, a gear bar 912 is provided on the surface of the pull rod 98, one end of the pull rod 98 is fixedly connected to a sliding plate 910, and the top of the sliding plate 910 is fixedly connected to the sliding plate 910, and one end of the sliding plate 910 is fixedly connected to a spring 99, and the servo motor 91 in the inner cavity of the sleeve plate 92 is started, so that the output end of the servo motor 91 drives the rotating shaft 93 to rotate in the inner cavity of the bearing sleeve 97, so that the third gear 913 is meshed and connected with the gear bar 912, and drives the pull rod 98 to move outward, and makes The connecting strip 911 drives the sliding plate 910 to slide in the inner cavity port of the sleeve 2, so that the sliding plate 910 opens the port and allows the molten metal to flow out from the opened port. When the work is completed, the servo motor 91 needs to be reversed. Through the squeezing of the spring 99, the gear bar 912 on the pulling rod 98 and the third gear 913 are pushed to contact each other, so that the third gear 913 will reversely engage with the gear bar 912, so that the pulling rod 98 and the connecting strip 911 drive the sliding plate 910 to reset and close the port of the inner cavity at the upper end of the sleeve 2.

[0034] In this embodiment, the pulling rod 98 is slidably sleeved in the inner cavity of the sleeve 2, and one end is located outside the sleeve 2, the bearing sleeve 97 is fixedly connected to the surface of the sleeve 2, the sliding plate 910 is slidably sleeved in the port of the inner cavity of the sleeve 2, and one end is against the port, one end of the spring 99 is fixedly connected to the inner wall of the interlayer of the sleeve 2, the first gear 94 and the second gear 95 and the third gear 913 and the gear bar 912 are meshed and connected with each other, and the opposite ends of the sleeve 2 and the discharge barrel 3 are slidably sleeved in the inner cavity of the limit groove 951 through the limit block, and are consistent with the front and back sides of the second gear 95.

[0035] See also Figure 4 The atomizing mechanism 8 includes a heat-insulating crucible 81 fixedly connected to the inner wall of the sleeve 2. The heat-insulating crucible 81 is funnel-shaped. A support rod 83 is symmetrically fixedly connected to the surface of the heat-insulating crucible 81. One end of the support rod 83 is fixedly connected to the inner wall of the sleeve 2. A filter screen 82 is fixedly connected to the inner wall of the heat-insulating crucible 81. An atomizing nozzle 84 is symmetrically fixedly connected to the bottom of the heat-insulating crucible 81. The atomizing nozzle 84 is inclined. The atomizing nozzle 84 penetrates the inner wall of the sleeve 2. One end of the atomizing nozzle 84 is fixedly connected to an annular tube 86, and the surface of the annular tube 86 is fixedly connected to a connecting tube 85. The annular tube 86 is fixedly sleeved on the surface of the sleeve 2.

[0036] See also Figure 3The smelting mechanism 7 includes two fixed plates 74 fixedly mounted on the top of the workbench 1. The fixed plate 74 is L-shaped, and one end is fixedly mounted on the surface of the sleeve 2. A connecting rod 76 is fixedly connected to the top of the fixed plate 74, and a connecting plate 73 is fixedly connected to the top of the connecting rod 76. A hydraulic cylinder 72 is fixedly sleeved on the surface of the connecting plate 73. The telescopic end of the hydraulic cylinder 72 is fixedly mounted on the top of the cover plate 71, and a heating rod 75 is symmetrically arranged on the bottom of the cover plate 71. The surface of the cover plate 71 coincides with the port on the top of the sleeve 2, and the heating rod 75 is located in the inner cavity of the upper end of the sleeve 2. The metal lightweight steel is put into the inner cavity of the sleeve 2, and the cover plate 71 is driven to rise and fall by the telescopic end of the hydraulic cylinder 72 to cover the cover plate 71, and then vacuum is drawn through the exhaust pipe 10, and then the lightweight steel is melted into molten metal through the heating rod 75.

[0037] The embodiment of the present invention provides a technical solution: a gas atomization preparation process of lightweight steel powder, comprising the following steps;

[0038] S1, smelting, first start the hydraulic cylinder 72, so that the telescopic end of the hydraulic cylinder 72 drives the cover plate 71 to rise from the top port of the sleeve 2, so that the heating rod 75 overflows from the inner cavity at the top of the sleeve 2, and then puts the metal lightweight steel into the inner cavity of the sleeve 2, and then start the hydraulic cylinder 72 again, so that the telescopic end of the hydraulic cylinder 72 drives the cover plate 71 to cover, and then connect the vacuum pump through the vacuum pipe 10 to evacuate the inner cavity at the upper end of the sleeve 2 to form a vacuum state, and then start multiple heating rods 75 to heat and melt the heating rods 75, so that the lightweight steel is melted into liquid metal;

[0039] S2, atomization, then start the servo motor 91 in the inner cavity of the sleeve plate 92, so that the output end of the servo motor 91 drives the rotating shaft 93 to rotate in the inner cavity of the bearing sleeve 97, so that the third gear 913 is meshed and connected with the gear bar 912, and drives the pulling rod 98 to move outward, and the connecting bar 911 drives the sliding plate 910 to slide in the inner cavity port of the sleeve 2, so that the sliding plate 910 opens the port, so that the molten metal flows out from the opened port and falls into the inner cavity of the heat-insulating crucible 81, wherein the filter screen 82 filters the impurities in the molten metal, and then The filtered molten metal will fall freely along the outlet, and at the same time, it will be connected to the external air pump through the connecting pipe 85, and the high-pressure inert gas will be introduced into the annular pipe 86, and then enter the atomizing nozzle 84 through the annular pipe 86, and accelerate through the Laval structure cavity to form a supersonic airflow, and the molten metal falling into the atomizing area will be impacted and broken by the gas spraying downward, so that it will be atomized into fine metal droplets, and the droplets will be changed into spherical particles by the surface tension in the air, and will be quickly cooled and solidified into metal powder in the atomizing chamber of the terminal inner cavity of the sleeve 2, and then drip into the inside of the discharge barrel 3;

[0040] When the rotating shaft 93 rotates, its first gear 94 will be meshed and connected with the second gear 95. Since the sleeve 2 and the discharge barrel 3 are limited by the sliding of the limit block and the limit groove 951, the first gear 94 drives the second gear 95 to rotate between the sleeve 2 and the discharge barrel 3, and the scraper 96 rotates along with the inner wall of the discharge barrel 3, so that the metal liquid in the atomization zone splashes on the inner wall of the discharge barrel 3 when it is impacted and crushed, and the residual metal powder is cleaned up.

[0041] S3, collect, then open valve 5, so that the cooled, solidified and removed metal powder is transferred into the collection box 6 for collection.

[0042] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A light steel powder atomization preparation device, comprising a workbench (1), characterized in that: The surface of the workbench (1) is fixedly sleeved with a sleeve (2), the upper surface of the sleeve (2) is fixedly connected to an exhaust pipe (10), the bottom of the workbench (1) is symmetrically fixedly connected with a connecting rod (4), and the opposite end of the connecting rod (4) is fixedly connected with a discharge barrel (3), the bottom of the discharge barrel (3) is provided with a valve (5), and a collection box (6) is provided below the valve (5), a cleaning mechanism (9) is provided between the sleeve (2) and the discharge barrel (3), a smelting mechanism (7) is provided on the top of the sleeve (2), and an atomizing mechanism (8) is provided in the inner cavity of the sleeve (2); The cleaning mechanism (9) comprises a servo motor (91) and a pulling rod (98) fixedly mounted on the bottom of the workbench (1) via a sleeve plate (92); the output end of the sleeve plate (92) is fixedly connected to a rotating shaft (93); the surface of the rotating shaft (93) is respectively fixedly sleeved with a first gear (94) and a third gear (913); the surface of the first gear (94) is meshingly connected to a second gear (95); the port of the inner cavity of the second gear (95) is fixedly connected to a scraper (96); the front and back surfaces of the second gear (95) are fixedly provided with a limiting groove (951); the surface of the rotating shaft (93) is rotatably sleeved with a bearing sleeve (97); the surface of the pulling rod (98) is provided with a gear bar (912); one end of the pulling rod (98) is fixedly connected to a sliding plate (910); the top of the sliding plate (910) is fixedly connected to a sliding plate (910); one end of the sliding plate (910) is fixedly connected to a spring (99); The pulling rod (98) is slidably sleeved in the inner cavity of the sleeve (2), and one end is located outside the sleeve (2); the bearing sleeve (97) is fixedly connected to the surface of the sleeve (2); the sliding plate (910) is slidably sleeved in the port of the inner cavity of the sleeve (2), and one end is against the port; one end of the spring (99) is fixedly connected to the inner wall of the sleeve (2) interlayer; the first gear (94) and the second gear (95) and the third gear (913) and the gear bar (912) are meshed and connected with each other; the opposite ends of the sleeve (2) and the discharge barrel (3) are slidably sleeved in the inner cavity of the limiting groove (951) through a limiting block, and are mutually matched with the front and back surfaces of the second gear (95); The atomizing mechanism (8) comprises a heat-insulating crucible (81) fixedly connected to the inner wall of the sleeve (2); a support rod (83) is symmetrically fixedly connected to the surface of the heat-insulating crucible (81); a filter screen (82) is fixedly connected to the inner wall of the heat-insulating crucible (81); an atomizing nozzle (84) is symmetrically fixedly connected to the bottom of the heat-insulating crucible (81); one end of the atomizing nozzle (84) is fixedly connected to an annular tube (86); and a connecting tube (85) is fixedly connected to the surface of the annular tube (86); The smelting mechanism (7) comprises two fixed plates (74) fixedly mounted on the top of the workbench (1); the top of the fixed plates (74) is fixedly connected to a second connecting rod (76); the top of the second connecting rod (76) is fixedly connected to a connecting plate (73); a hydraulic cylinder (72) is fixedly sleeved on the surface of the connecting plate (73); the telescopic end of the hydraulic cylinder (72) is fixedly mounted on the top of the cover plate (71); and heating rods (75) are symmetrically arranged on the bottom of the cover plate (71).

2. The device for preparing light steel powder by gas atomization according to claim 1, characterized in that: One end of the support rod (83) is fixedly connected to the inner wall of the sleeve (2); the heat-insulating crucible (81) is funnel-shaped; and the annular tube (86) is fixedly sleeved on the surface of the sleeve (2).

3. The device for preparing light steel powder by gas atomization according to claim 1, characterized in that: The atomizing nozzle (84) is inclined, and the atomizing nozzle (84) penetrates the inner wall of the sleeve (2).

4. The device for preparing light steel powder by gas atomization according to claim 1, characterized in that: The fixing plate (74) is L-shaped, and one end is fixedly mounted on the surface of the sleeve (2); the surface of the cover plate (71) matches the port at the top of the sleeve (2), and the heating rod (75) is located in the inner cavity at the upper end of the sleeve (2).

5. The device for preparing light steel powder by gas atomization according to claim 1, characterized in that: The rotating shaft (93) passes through the top of the workbench (1) and extends outside the top of the workbench (1), and the scraper (96) is in contact with the inner wall of the discharge barrel (3).

6. A process for preparing a light steel powder by gas atomization according to any one of claims 1 to 5, characterized in that: The steps include: S1, melting, putting metal lightweight steel into the inner cavity of the sleeve (2), driving the cover plate (71) to rise and fall through the telescopic end of the hydraulic cylinder (72), so that the cover plate (71) is closed, and then vacuuming is performed through the exhaust pipe (10), and then the lightweight steel is melted into metal liquid through the heating rod (75); S2, atomization, then the output end of the servo motor (91) drives the rotating shaft (93) to rotate, so that the third gear (913) is meshed with the gear bar (912), and drives the pulling rod (98) to move outward, and the sliding plate (910) slides, so that the port is opened, and the molten metal flows out from the opened port and falls into the inner cavity of the heat-insulating crucible (81), wherein the filter screen (82) filters the impurities of the molten metal, and the molten metal falls freely along the outlet, and at the same time, the high-pressure inert gas is introduced into the atomizing nozzle (84) through the connecting pipe (85), and is accelerated through the Laval structure cavity to form a supersonic airflow, which impacts and breaks the molten metal falling into the atomization area, so that it is atomized into fine metal droplets, and quickly cooled and solidified into metal powder, and drips into the inside of the discharge barrel (3); At the same time, the first gear (94) is meshed with the second gear (95), so that the second gear (95) drives the scraper (96) to rotate along the inner wall of the discharge barrel (3), thereby cleaning up the metal powder remaining on the inner wall of the discharge barrel (3) and splashing the metal liquid in the atomization zone during the impact crushing; S3, collect, then open valve (5) to allow the cooled, solidified and removed metal powder to be transferred to the collection box (6) for collection.

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