A magnesium alloying device by fluxing method and method thereof

Abstract

The application discloses a magnesium-mixing device and method by means of impact melting, which comprises a discharging distributor, at least two groups of magnesium-mixing mechanisms arranged outside a smelting furnace, a plurality of magnesium-mixing mechanisms constituting each group of magnesium-mixing mechanisms are arranged uniformly along the circumference of the smelting furnace, the discharging distributor is communicated with each magnesium-mixing mechanism through a plurality of discharging sub-pipes, a discharging valve is installed on the discharging main pipe, a pressure regulating pipe is arranged at the upper end of the smelting furnace, and a pressure regulating valve is installed on the pressure regulating pipe; the magnesium-mixing method comprises the following steps: powering off the smelting furnace to form a thin slag layer on the liquid surface, opening each magnesium-mixing mechanism, increasing the pressure of the magnesium-mixing mechanism, injecting the magnesium in the magnesium-mixing mechanism into the smelting furnace, releasing the pressure of the smelting furnace and restoring the power supply of the smelting furnace. The application avoids the volatilization of magnesium, improves the product quality of rare earth magnesium-based hydrogen storage alloy, and reduces the operation difficulty of magnesium addition. The application is suitable for the addition of magnesium in the production of rare earth magnesium-based hydrogen storage alloy.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rare earth magnesium-based hydrogen storage alloy production, in particular to a magnesium adding device for the fluxing method and a method thereof. BACKGROUND

[0002] Due to the characteristics of low melting point and low boiling point (melting point 651℃, boiling point 1108℃) of magnesium metal, in the production process of rare earth magnesium-based hydrogen storage alloy, magnesium metal needs to be added in the smelting process. However, due to the high temperature in the smelting furnace, magnesium metal is easily volatilized. The existing adding method of magnesium metal is to open the smelting furnace and directly put the magnesium metal into the smelting furnace. This method causes a large amount of magnesium metal to be volatilized, greatly affects the composition of the obtained rare earth magnesium-based hydrogen storage alloy product, and increases the difficulty of production operation. Therefore, the adding method of magnesium metal is one of the key factors in the production of rare earth magnesium-based hydrogen storage alloy. SUMMARY

[0003] The present application provides a magnesium adding device for the fluxing method and a method thereof, which can avoid the volatilization of magnesium metal when adding magnesium metal, improve the product quality of rare earth magnesium-based hydrogen storage alloy, and reduce the operation difficulty of adding magnesium metal.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] A magnesium adding device for the fluxing method, comprising a material distribution device arranged above a smelting furnace and connected to the smelting furnace through a material distribution pipe, at least two groups of magnesium adding mechanisms are arranged vertically outside the smelting furnace, a plurality of magnesium adding mechanisms constituting each magnesium adding mechanism group are uniformly arranged along the circumference of the smelting furnace, and the material distribution pipe is connected to each magnesium adding mechanism through a plurality of material distribution pipes, a discharge valve is installed on the material distribution pipe, a pressure regulating pipe is arranged at the upper end of the smelting furnace, and a pressure regulating valve is installed on the pressure regulating pipe.

[0006] Further, the vertical projections of the magnesium adding mechanisms in the two adjacent magnesium adding mechanism groups are staggered, and the number of magnesium adding mechanisms in each magnesium adding mechanism group is at least four.

[0007] Further, each magnesium adding mechanism comprises a fluxing type material conveying part and a pneumatic type driving part connected to each other, the discharge end of the fluxing type material conveying part is connected to the smelting furnace, the feeding end of the fluxing type material conveying part is connected to the corresponding material distribution pipe, and the pneumatic type driving part is arranged at the end of the fluxing type material conveying part away from the smelting furnace.

[0008] Further, the smelting and feeding part comprises a feeding cylinder arranged obliquely downward and having a lower end mounted on the smelting furnace, a mounting shaft coaxially arranged in the feeding cylinder, and a spiral conveying blade configured on the mounting shaft and helically extending along the axis of the mounting shaft.

[0009] Further, the opening and closing valve comprises a mounting sleeve configured on the end of the mounting shaft, one end of a mounting rod with a regular polygonal cross section inserted into the mounting sleeve, and a spherical valve body configured on the end of the mounting rod close to the smelting furnace and closed in the corresponding feeding port.

[0010] Further, the smelting and feeding part comprises a feeding cylinder arranged obliquely downward and having a lower end mounted on the smelting furnace, a mounting shaft coaxially arranged in the feeding cylinder, and a spiral conveying blade configured on the mounting shaft and helically extending along the axis of the mounting shaft.

[0011] Further, the pneumatic driving part comprises an impeller shell A mounted on the upper end of the feeding cylinder and separated from the feeding cylinder, and an impeller body A assembled in the impeller shell A and coaxially assembled on the mounting shaft.

[0012] Further, a wheel type discharging mechanism is mounted on the outlet end of each of the discharging sub-pipes and communicates with the corresponding smelting and magnesium alloying mechanism.

[0013] Further, the wheel type discharging mechanism comprises a discharging cylinder arranged vertically and having two ends communicated with the discharging sub-pipe and the smelting and magnesium alloying mechanism, respectively, an impeller body C assembled in the discharging cylinder and coaxially connected with a rotating shaft transversely connected to the discharging cylinder, one end of the rotating shaft extending to the outside through an impeller shell B and coaxially connected with an impeller body B, the impeller shell B being mounted on the side wall of the discharging cylinder and the impeller body B being assembled in the impeller shell B.

[0014] The application further discloses a magnesium alloying method using the smelting and magnesium alloying device.

[0015] S1, before additional magnesium is added, the power supply of the smelting furnace is reduced to zero until a thin layer of metal slag is formed on the surface of the alloy in the smelting furnace;

[0016] S2, each smelting and magnesium matching mechanism is started, and the magnesium powder or magnesium particles are supplied to each smelting and magnesium matching mechanism through the downpipe of the down distributor;

[0017] S3, each smelting and magnesium matching mechanism is pressurized, so that the pressure in the smelting and magnesium matching mechanism is higher than the pressure corresponding to the outlet end of the smelting and magnesium matching mechanism in the smelting furnace;

[0018] S4, each group of smelting and magnesium matching mechanisms is controlled to act in turn from top to bottom, so that the magnesium powder or magnesium particles first enter the upper layer of the molten alloy, and then are injected into the smelting furnace in turn from top to bottom at intervals, and the interval time is 2-4 min; the outlet end of the smelting and magnesium matching mechanism located in the uppermost layer is lower than the thin layer of metal slag;

[0019] S5, after the addition of magnesium is completed, the pressure in the smelting furnace is restored to the predetermined pressure range by adjusting the pressure regulating valve on the pressure regulating pipe;

[0020] S6, the power of the smelting furnace is increased to the maximum value of the previous power supply, and after a period of time, the casting operation is carried out.

[0021] Compared with the prior art, the application has the following technical progress: when additional magnesium metal is added, the power supply of the smelting furnace is first reduced to zero, and after a period of time, a thin layer of metal slag is formed on the alloy liquid surface in the smelting furnace, which blocks the volatilization of magnesium metal; thus, the additional magnesium metal is injected into the smelting furnace below the thin layer of metal slag by the respective magnesium injection and smelting mechanisms; and during the addition of magnesium metal, the magnesium metal is added in the order from top to bottom, that is, the magnesium metal is added by the magnesium injection and smelting mechanism group located at the upper position, and after the magnesium metal is added, the liquid material at the position in the smelting furnace gradually cools and reduces the intensity of molecular movement, so that the flowability of the liquid material is reduced, thereby avoiding the volatilization of magnesium metal when the magnesium metal at the lower position is added after a period of time; after the addition of magnesium metal is completed, the pressure of the smelting furnace is increased, and the pressure of the smelting furnace needs to be adjusted to the predetermined pressure range by the pressure regulating valve, so that the smelting of the rare earth magnesium-based hydrogen storage alloy is at the expected pressure, thereby avoiding the change of the smelting pressure and affecting the product quality; then, the power supply of the smelting furnace is increased to the maximum value, so as to realize the purpose of continuous smelting; in summary, the application can fully avoid the volatilization of magnesium metal during the addition of magnesium metal, improve the product quality of the rare earth magnesium-based hydrogen storage alloy, and reduce the operation difficulty of the addition of magnesium metal. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, but do not limit the application.

[0023] In the drawings:

[0024] Figure 1 The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, but do not limit the application.

[0025] Figure 2 The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, but do not limit the application.

[0026] Figure 3 The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, but do not limit the application.

[0027] Figure 4 The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, but do not limit the application.

[0028] Figure 5 The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, but do not limit the application.

[0029] Figure 6 for Figure 5 enlarged view of site A in the middle;

[0030] Figure 7 for Figure 5 enlarged view of site B in the middle;

[0031] Figure 8 is a partial structure schematic view of the magnesium matching mechanism of the embodiment of the present application after being split;

[0032] Figure 9 for Figure 5 enlarged view of site C in the middle;

[0033] Figure 10 is a structure schematic view of the wheel type unloading mechanism after being split.

[0034] Label components: 100-melting furnace, 101-feeding port, 102-pressure regulating pipe, 103-pressure regulating valve, 200-unloading distributor, 300-unloading main pipe, 301-discharging valve, 400-unloading sub-pipe, 500-wheel type unloading mechanism, 501-unloading cylinder, 502-impeller shell B, 503-second air inlet joint, 504-second air outlet joint, 505-rotating shaft, 506-impeller body C, 507-impeller body B, 508-second end cover, 600-magnesium matching mechanism, 601-feeding cylinder, 602-feeding joint, 603-feeding control valve, 604-mounting shaft, 605-spiral conveying blade, 606-conducting channel, 607-feeding plenum, 608-melting cavity, 609-fitting sleeve, 610-fitting rod, 611-spherical valve body, 612-hard spring, 613-impeller shell A, 614-impeller body A, 615-first end cover, 616-first air inlet joint, 617-first air outlet joint, 618-air inlet valve, 6181-movable valve rod, 6182-conical valve head, 6183-return spring. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present application, and are not used to limit the present application.

[0036] The present application discloses a magnesium matching device by melting method, as shown in Figures 1-10As shown, the device comprises a material feeding distributor 200 and a plurality of molten metal injection and magnesium matching mechanisms 600. The material feeding distributor 200 is arranged above the smelting furnace 100, and the lower end of the material feeding distributor 200 is provided with a material feeding main pipe 300 which is communicated with the smelting furnace 100, and a material outlet valve 301 is arranged on the material feeding main pipe 300. The plurality of molten metal injection and magnesium matching mechanisms 600 are divided into at least two groups, and the groups of the molten metal injection and magnesium matching mechanisms 600 are arranged in the vertical direction outside the smelting furnace 100, and the plurality of molten metal injection and magnesium matching mechanisms 600 in each group are uniformly arranged along the circumference of the smelting furnace 100, and the outlet end of each molten metal injection and magnesium matching mechanism 600 is communicated with the corresponding part of the smelting furnace 100. The material feeding distributor 200 is communicated with each molten metal injection and magnesium matching mechanism 600 through a plurality of material feeding branch pipes 400, and a pressure regulating pipe 102 is arranged at the upper end of the smelting furnace 100, and a pressure regulating valve 103 is arranged on the pressure regulating pipe 102.

[0037] As a preferred embodiment of the present application, when the metal magnesium is added, the power supply of the smelting furnace 100 is reduced to zero, and after a period of time, a thin layer of metal slag is formed on the alloy liquid surface in the smelting furnace 100, which can block the volatilization of the metal magnesium. Thus, the additional metal magnesium is injected into the smelting furnace 100 below the thin layer of metal slag through the molten metal injection and magnesium matching mechanisms 600. Moreover, during the addition of the metal magnesium, the smelting furnace 100 is added with the metal magnesium in the order from top to bottom, that is, the magnesium adding operation of the group of the molten metal injection and magnesium matching mechanisms 600 located at the top is performed first. After the metal magnesium is added, the liquid material at the position in the smelting furnace 100 will gradually cool down and reduce the intensity of molecular movement, so that the flowability of the liquid material is reduced. Thus, after a period of time, when the metal magnesium is added at the position below, the liquid material with reduced flowability blocks the newly added metal magnesium below, thereby fully avoiding the volatilization of the metal magnesium. After the addition of the metal magnesium is completed, the pressure of the smelting furnace 100 will increase to a certain extent, and the pressure regulating valve 103 needs to be adjusted to restore the pressure in the smelting furnace 100 to the predetermined pressure range, so that the smelting of the rare earth magnesium-based hydrogen storage alloy is under the expected pressure, thereby avoiding the influence of the change of the smelting pressure on the product quality. Then, the power supply of the smelting furnace 100 is increased to the maximum value, so as to realize the purpose of continuous smelting. As can be seen, the present application can fully avoid the volatilization of the metal magnesium during the addition of the metal magnesium, improve the product quality of the rare earth magnesium-based hydrogen storage alloy, and reduce the operation difficulty of the addition of the metal magnesium.

[0038] As a preferred embodiment of the present application, as shown in Figure 1As shown in the figure, the vertical projections of the magnesium smelting and matching mechanisms 600 in the two adjacent groups of magnesium smelting and matching mechanism 600 groups are staggered, and the number of magnesium smelting and matching mechanisms 600 in each group of magnesium smelting and matching mechanism 600 is at least four. Because the vertical projections of the magnesium smelting and matching mechanisms 600 in the upper and lower groups of magnesium smelting and matching mechanism 600 groups are staggered, the metal magnesium is prevented from gathering in the vertical direction in the smelting furnace 100, thereby preventing the smelting efficiency of the smelting furnace 100 for the metal magnesium from being reduced.

[0039] As a preferred embodiment of the present application, as shown in the figure, Figures 6-7 The magnesium smelting and matching mechanism 600 includes a magnesium smelting and matching type feeding part and a pneumatic type driving part, which are connected together, and the pneumatic type driving part is used to drive the magnesium smelting and matching type feeding part to move, so that the magnesium smelting and matching type feeding part injects the metal magnesium (powder or particles) into the smelting furnace 100. The discharge end of the magnesium smelting and matching type feeding part is communicated with the smelting furnace 100, the feeding end of the magnesium smelting and matching type feeding part is communicated with the corresponding discharging branch pipe 400, and the pneumatic type driving part is arranged at the end of the magnesium smelting and matching type feeding part away from the smelting furnace 100.

[0040] As a preferred embodiment of the present application, as shown in the figure, Figure 5 The magnesium smelting and matching type feeding part includes a feeding cylinder 601, a mounting shaft 604 and an on-off valve. The feeding cylinder 601 is arranged obliquely downward, and the lower end of the feeding cylinder 601 is mounted on the smelting furnace 100; the mounting shaft 604 is mounted in the feeding cylinder 601, and the axis of the mounting shaft 604 coincides with the axis of the feeding cylinder 601. A spiral conveying blade 605 is arranged on the mounting shaft 604, and the spiral conveying blade 605 spirally extends along the axis of the mounting shaft 604. The on-off valve of the present embodiment is arranged at the end of the mounting shaft 604 close to the smelting furnace 100, and the on-off valve is used to open and close the feeding port 101. The number of the feeding ports 101 of the present embodiment is multiple, and the feeding ports 101 are all arranged on the peripheral wall of the smelting furnace 100, and each feeding port 101 is arranged corresponding to the on-off valve on the corresponding magnesium smelting and matching mechanism 600. The working principle of the present embodiment is that the pneumatic type driving part drives the mounting shaft 604 to rotate, so that the spiral conveying blade 605 conveys the metal magnesium in the feeding cylinder 601 to the obliquely downward direction, the on-off valve is opened, the metal magnesium enters the smelting furnace 100, and after the metal magnesium is added, the on-off valve is closed. Figure 6As shown, the on-off valve comprises an assembling sleeve 609, an assembling rod 610, a spherical valve body 611 and a hard spring 612. The assembling sleeve 609 is configured at the lower end of the mounting shaft 604, one end of the assembling rod 610 is inserted into the assembling sleeve 609, and the cross section of the assembling rod 610 is a regular polygon, and the inner cavity of the assembling sleeve 609 is also a regular polygon, so that the assembling rod 610 and the assembling sleeve 609 are matched when the assembling rod 610 is inserted into the assembling sleeve 609, thereby avoiding relative rotation between the assembling rod 610 and the assembling sleeve 609. The spherical valve body 611 of the embodiment is configured at one end of the assembling rod 610 close to the smelting furnace 100, and the spherical valve body 611 is used to close the corresponding feeding port 101. A pneumatic cavity is formed between the assembling sleeve 609 and the corresponding end of the mounting shaft 604 into which the assembling rod 610 is inserted, and the hard spring 612 is arranged in the pneumatic cavity, and two ends of the hard spring 612 are connected with the assembling rod 610 and the assembling sleeve 609 respectively. In order to drive the spherical valve body 611 to open and close the feeding port 101, a through channel 606 is formed in the mounting shaft 604, the through channel 606 extends along the axis of the mounting shaft 604 and is used to communicate the pneumatic cavity with the outside. High-pressure gas in the outside enters the pneumatic cavity through the through channel 606, and then drives the assembling rod 610 to move outward, and the hard spring 612 is stretched and stored energy in the process of movement, the spherical valve body 611 moves with the assembling rod 610 and gradually extends into the smelting furnace 100, at this time the feeding port 101 is opened, the mounting shaft 604 is driven to rotate, so that the magnesium metal in the feeding cylinder 601 enters the smelting furnace 100 through the feeding port 101; when the addition of the magnesium metal is completed, the high-pressure gas in the driving cavity is discharged from the through channel 606, and the assembling rod 610 drives the spherical valve body 611 to reset under the action of the hard spring 612, until the spherical valve body 611 closes the feeding port 101.

[0041] As a preferred embodiment of the present application, Figures 5-7As shown, the melting cavity 608 and the feed pressurizing cavity 607 are arranged in the feed cylinder 601, and the melting cavity 608 and the feed pressurizing cavity 607 are respectively located at the two ends of the helical conveying blade 605 close to and away from the smelting furnace 100. The air inlet valve 618 is arranged on the mounting shaft 604 and located in the feed pressurizing cavity 607. The air inlet valve 618 is used for opening and closing the through channel 606 and the feed pressurizing cavity 607. In the embodiment, the feed joint 602 is arranged on the feed cylinder 601, the feed control valve 603 is arranged on the feed joint 602, the feed joint 602 is arranged above the feed pressurizing cavity 607, and the lower end of the feed joint 602 is communicated with the feed pressurizing cavity 607. The specific structure of the air inlet valve 618 is that the air inlet valve 618 comprises a movable valve rod 6181 movably connected to the mounting shaft 604 in the radial direction of the mounting shaft 604, the movable valve rod 6181 penetrates the through channel 606, a trumpet-shaped air nozzle is arranged on the mounting shaft 604 and communicated with the through channel 606, the trumpet-shaped air nozzle is closed by a tapered valve head 6182, the small-diameter end of the tapered valve head 6182 is connected with the corresponding end of the movable valve rod 6181, and a return spring 6183 is arranged between the movable valve rod 6181 and the mounting shaft 604, preferably, the return spring 6183 is sleeved on the movable valve rod 6181. The working principle of the embodiment is that when the metal magnesium enters the feed pressurizing cavity 607 from the feed joint 602, the control pneumatic driving part drives the mounting shaft 604 to rotate, and under the action of the helical conveying blade 605, the metal magnesium fills the melting cavity 608, and at this time, the space in the feed cylinder 601 where the helical conveying blade 605 is located is also filled, the feed pressurizing cavity 607 is filled to at least 3 / 4 of its capacity, the feed control valve 603 is closed, the argon is gradually injected into the pneumatic cavity from the through channel 606, the on-off valve is opened, the argon opens the air inlet valve 618, part of the argon enters the feed pressurizing cavity 607, and the metal magnesium in the feed pressurizing cavity 607 is pressurized, so that the metal magnesium enters the smelting furnace 100 under positive pressure, and the process is continued until the metal magnesium in the feed cylinder 601 completely enters the smelting furnace 100. Because a small amount of argon enters the smelting furnace 100 during the addition of the metal magnesium, when all the smelting magnesium mechanisms complete the magnesium addition operation, the pressure of the smelting furnace 100 needs to be adjusted to reach the predetermined range. The embodiment adopts the pressurized magnesium addition mode to add the metal magnesium, and the problem of backflow is avoided.

[0042] As a preferred embodiment of the present application, Figure 5 、 8As shown, the pneumatic drive unit includes an impeller housing A613, an impeller body A614, and a first end cover 615. The impeller body A614 is coaxially mounted on the upper end of the mounting shaft 604. The impeller housing A613 is mounted on the upper end of the conveying cylinder 601 and is isolated from it. The impeller body A614 is assembled inside the impeller housing A613. The first end cover 615 is detachably connected to the open end of the impeller housing A613. In this embodiment, a first air inlet 616 and a first air outlet 617 are constructed on the impeller housing A613. High-pressure air enters the impeller housing A613 through the first air inlet 616, driving the impeller body A614 to rotate. The impeller body A614 then drives the mounting shaft 604 to rotate, realizing the conveying operation of magnesium metal in the conveying cylinder 601. The high-pressure gas, after kinetic energy loss, is discharged through the first air outlet 617.

[0043] In a preferred embodiment of the present invention, in order to control the amount of metallic magnesium entering the conveying cylinder 601 and to ensure that the metallic magnesium smoothly enters the conveying cylinder 601, the measures taken are as follows: Figures 3-5 As shown in Figures 9-10, a wheel-type feeding mechanism 500 is installed at the outlet end of each feeding branch pipe 400. The outlet end of the wheel-type feeding mechanism 500 is connected to the corresponding melting and distributing magnesium mechanism 600. Specifically, the wheel-type feeding mechanism 500 includes a feeding cylinder 501, an impeller housing B502, an impeller body B507, an impeller body C506, and a rotating shaft 505. The feeding cylinder 501 is vertically arranged, and its two ends are respectively connected to the feeding branch pipe 400 and the feeding joint 602 of the melting and distributing magnesium mechanism 600. The impeller body C506 is assembled inside the feeding cylinder 501. The two ends of the rotating shaft 505 pass laterally through the feeding cylinder 501, and the rotating shaft 505 is rotatably connected to the feeding cylinder 501. The impeller body C506 is assembled on the rotating shaft 505 and coincides with the axis of the rotating shaft 505. In this embodiment, one end of the rotating shaft 505 passes through the corresponding side wall of the impeller housing B502 and extends to the outside. This end of the rotating shaft 505 is coaxially connected to the impeller body B507. The impeller housing B502 is installed on the side wall of the feed cylinder 501, and the impeller body B507 is assembled inside the impeller housing B502. The open end of the impeller body B507 is closed by the second end cap 508. In this embodiment, a second air inlet connector 503 and a second air outlet connector 504 are constructed on the impeller housing B502. High-pressure air enters into the impeller housing B502 and drives the impeller body B507 to rotate. The impeller body B507 drives the rotating shaft 505 to rotate, so that the rotating shaft 505 drives the impeller body C506 to rotate. During the rotation of the impeller body C506, the magnesium metal located in the feed pipe 400 is gradually supplied to the feed cylinder 601. In this embodiment, a counter can be installed outside the feed cylinder 501. The counter is used to record the number of rotations of the rotating shaft 505, and then to determine the amount of magnesium metal entering the feed cylinder 601.

[0044] The present invention also discloses a method for preparing magnesium using the above-described melting method magnesium preparation apparatus, comprising the following steps:

[0045] S1. Before adding metallic magnesium, reduce the power supply of the smelting furnace 100 to zero until a thin layer of metallic slag forms on the surface of the alloy liquid inside the smelting furnace 100.

[0046] S2. Open each magnesium melting and dispensing mechanism 600. Magnesium powder or magnesium particles are evenly supplied to each magnesium melting and dispensing mechanism 600 by the feeding distributor 200 through the feeding pipe 400.

[0047] S3. Pressurize each magnesium smelting and distributing mechanism 600 so that the pressure inside the magnesium smelting and distributing mechanism 600 is higher than the pressure inside the smelting furnace 100 and the corresponding pressure at the outlet end of the magnesium smelting and distributing mechanism 600.

[0048] S4. Control each group of magnesium-filling and melting mechanism 600 to operate sequentially from top to bottom, so that magnesium powder or magnesium particles first enter the upper layer of the molten alloy, and then are injected into the melting furnace 100 sequentially from top to bottom at intervals of 2-4 minutes; the outlet end of the magnesium-filling and melting mechanism 600 located at the top layer is lower than the thin metal slag layer.

[0049] S5. After the magnesium metal is added, the pressure inside the smelting furnace 100 is restored to the predetermined pressure range by adjusting the pressure regulating valve 103 on the pressure regulating pipe 102.

[0050] S6. Increase the power of the smelting furnace 100 to the maximum value of the previous power supply, maintain it for a period of time, and then carry out the casting operation.

[0051] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A magnesium injection device by means of fluxing method, characterized in that: The application relates to a magnesium-melting device, which comprises a magnesium-melting device, a magnesium-melting furnace, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a 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magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting device, a magnesium-melting 2. A magnesium alloying device by fluxing method according to claim 1, characterized in that: ​ 3. A magnesium alloying device by fluxing method according to claim 1, characterized in that: ​ 4. The magnesium alloying device by fluxing method according to claim 1, characterized in that: ​ 5. A magnesium injection device according to claim 4, characterized in that: The wheel type discharging mechanism comprises a discharging cylinder vertically arranged and communicated with a discharging branch and a melting and magnesium matching mechanism at both ends, a impeller body C is assembled in the discharging cylinder, the impeller body C is coaxially connected with a rotating shaft transversely connected with the discharging cylinder, one end of the rotating shaft extends to the outside through an impeller shell B and is coaxially connected with the impeller body B, the impeller shell B is mounted on the side wall of the discharging cylinder, and the impeller body B is assembled in the impeller shell B.

6. A magnesium alloying method using the magnesium alloying device according to any one of claims 1 to 5, characterized by, The method comprises the following steps: S1, before additional metal magnesium is added, the power supply of the smelting furnace is reduced to zero until a layer of metal thin slag layer is formed on the alloy liquid surface in the smelting furnace; S2, each melting and magnesium matching mechanism is started, and magnesium powder or magnesium particles are uniformly supplied to each melting and magnesium matching mechanism by the discharging distributor through the discharging branch; S3, each melting and magnesium matching mechanism is pressurized so that the pressure in the melting and magnesium matching mechanism is higher than the pressure corresponding to the outlet end of the melting and magnesium matching mechanism inside the smelting furnace; S4, each group of melting and magnesium matching mechanisms is controlled to act in turn from top to bottom, so that the magnesium powder or magnesium particles first enter the upper layer of the molten alloy, and then are sequentially injected into the smelting furnace from top to bottom at intervals, and the interval time is 2-4 min; the outlet end of the melting and magnesium matching mechanism located at the uppermost layer is lower than the metal thin slag layer; S5, after the additional metal magnesium is added, the pressure in the smelting furnace is restored to the predetermined pressure range by adjusting the pressure regulating valve on the pressure regulating pipe; S6, the power of the smelting furnace is increased to the maximum value of the previous power supply, and after a period of time, casting operation is carried out.

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