A device and forming method for high flux production of magnesium-based hydrogen storage alloy fibers

Abstract

The application discloses a device and a forming method for high-flux preparation of magnesium-based hydrogen storage alloy fibers, and relates to the field of magnesium-based hydrogen storage material preparation. The application solves the problems of low production efficiency and inability to accurately control variables in the prior art. The application places pre-prepared magnesium alloy rods in four boron nitride crucibles and opposite to the wedge-shaped sharp corners of the copper roller, the alloy rod placement position can be freely moved on the slide rail by moving the slide block to obtain different linear velocities, the furnace door is closed to fill in argon, the rotation speed of the copper roller is controlled by a copper roller rotation speed controller to drive the servo motor, the currents of the four induction coils are respectively controlled by an induction coil current controller, the surface of the molten alloy presents a convex molten pool, the feeding device controller is started and the upward moving speed of the molten alloy is respectively adjusted by four feeding devices, when the wedge-shaped sharp corners of the high-speed rotating copper roller keep in contact with the convex molten pool of the molten alloy, different magnesium-based hydrogen storage alloy fibers are obtained. The application is used for the preparation of alloy fibers.

Description

Technical Field

[0001] This invention relates to an apparatus and method for preparing magnesium-based hydrogen storage alloy fibers, specifically to an apparatus and forming method for high-throughput preparation of magnesium-based hydrogen storage alloy fibers. It belongs to the field of magnesium-based hydrogen storage material preparation. Background Technology

[0002] Hydrogen energy is a clean secondary energy source with great development potential. It solves the environmental pollution problems of traditional fossil fuels and can convert and utilize clean and renewable primary energy sources such as wind, hydro, and solar energy, perfectly resolving issues such as unstable energy output, limited access, and difficulties in storage and transportation. The "hydrogen economy" is considered a sustainable energy development system, and national plans list "key scientific issues in the large-scale, pollution-free production, transportation, and high-density storage of hydrogen energy." However, among current hydrogen storage technologies, there is still no efficient, large-scale hydrogen storage technology that meets industrialization needs. Therefore, research and development of hydrogen storage technologies are crucial.

[0003] Currently, hydrogen is mainly stored in three forms: solid, liquid, and gas. Solid hydrogen storage offers numerous advantages, including small volume, light weight, large storage capacity, low cost, high safety, and recyclability. Among these, magnesium-based hydrogen storage alloys utilizing metal hydrides offer advantages such as wide availability, low price, environmental friendliness, and light weight (1.74 g / cm³). 3 With advantages such as high capacity (7.6 wt.% and 110 g / L) and excellent reversibility, it is one of the most promising hydrogen storage materials.

[0004] Current methods for preparing magnesium-based hydrogen storage alloy fibers utilize melt spinning technology. The working principle is as follows: an alloy rod is melted using induction heating; a copper roller rotates rapidly under the drive of a servo motor; a feeding device propels the molten metal upwards, maintaining contact with the wedge-shaped edge of the copper roller; the wedge-shaped edge of the copper roller continuously quenches the molten alloy in the pool; centrifugal force then throws the molten alloy out, and under the action of surface tension, it is rounded into fine fiber filaments. This fiber preparation technology can only produce one type of hydrogen storage alloy fiber with one composition and process parameters at a time, resulting in low production efficiency.

[0005] In summary, existing technologies for preparing magnesium-based hydrogen storage alloy fibers can only produce one type of hydrogen storage alloy fiber at a time, resulting in extremely low production efficiency. Furthermore, when preparing a set of magnesium-based hydrogen storage alloy fibers, since only one type of hydrogen storage alloy fiber can be produced at a time, a set of hydrogen storage alloy fibers needs to be prepared in multiple batches, making it impossible to precisely control variables during the fiber preparation process. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of low production efficiency and inability to accurately control variables in existing magnesium-based hydrogen storage alloy fiber technology, which can only produce a single type of hydrogen storage alloy fiber at a time and requires multiple production processes for a group of magnesium-based hydrogen storage alloy fibers. Therefore, this invention provides a device and forming method for high-throughput preparation of magnesium-based hydrogen storage alloy fibers.

[0007] The technical solution of this invention is:

[0008] An apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers includes a furnace body, an alloy melting and heating system, a melt spinning and quenching fiber forming system, a parameter control system, a gas protection system, and a cooling system. The furnace body has four chambers, each containing an alloy melting and heating system. Each alloy melting and heating system includes an induction coil, a boron nitride crucible, a substrate, a push rod, and a fixed stage. The induction coil is mounted on the upper outer wall of the boron nitride crucible, the substrate is embedded within the crucible, the push rod passes through the bottom of the crucible and rests against the substrate, and the lower part of the crucible is connected to the fixed stage. The fixed stage is installed within the furnace body and can slide along the length and width of the furnace body. The fiber forming system includes a servo motor, copper rollers, and a feeding device. The servo motor is mounted on the upper surface of the furnace body, and its output shaft passes through the furnace body and connects to the copper rollers located inside the furnace body. The feeding device is mounted on the lower end of the fixed platform and connected to the lower end of the push rod. The parameter control system includes a feeding device controller, an induction coil current controller, and a copper roller speed controller. The feeding device controller is connected to the feeding device, the induction coil current controller is connected to the induction coil, and the copper roller speed controller is connected to the servo motor, thereby controlling the fiber forming process parameters. The gas protection system and cooling system are both installed outside the furnace body and connected to the inside of the furnace body to achieve cooling of the furnace body.

[0009] Furthermore, the furnace body includes a furnace body, two furnace doors, four furnace door locks, and four observation ports. The two furnace doors are installed on the furnace body, the four furnace door locks are installed on the two furnace doors, and an observation port is installed on each of the four sides of the furnace body.

[0010] Furthermore, the furnace body also includes a partition plate and four slides. The partition plate is installed inside the furnace body and divides the furnace cavity into four areas, with a slide installed in each area.

[0011] Preferably, the partition is a cross-shaped partition.

[0012] Furthermore, the furnace body also includes multiple first latches, with one first latch installed on each slide.

[0013] Furthermore, the copper roller is disc-shaped, and an annular wedge-shaped tip is provided at the lower end face of the disc, the angle of the annular wedge-shaped tip being 60 degrees.

[0014] Furthermore, the gas protection system includes a mechanical pump, a molecular pump, a gas extraction pipeline, an argon cylinder, a gas filling pipeline, a first valve, a second valve, and a pressure gauge. The molecular pump, located outside the furnace body, is connected to the inside of the furnace body through the gas extraction pipeline. The first valve is installed on the gas extraction pipeline. The mechanical pump is connected to the gas extraction pipeline. The argon cylinder is connected to the inside of the furnace body through the gas filling pipeline. The second valve and the pressure gauge are installed on the gas filling pipeline.

[0015] Furthermore, the cooling system includes a water tank, a water pump, and water pipes. The water tank and the water pump are connected by one end of the water pipes, and the other end of the water pipes is connected to the molecular pump.

[0016] This invention also provides a method for preparing magnesium-based hydrogen storage alloy fibers using an apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers, comprising the following steps:

[0017] Step 1: Place the precast alloy rods and fill the furnace with protective gas;

[0018] Step 11: After grinding off the surface oxide scale and cleaning the pre-made magnesium alloy rods, place them into the interiors of four boron nitride crucibles respectively, and adjust the position of the induction coils to the upper-middle part of the outer periphery of the boron nitride crucibles.

[0019] Steps 1 and 2: Manually adjust the position of the alloy bar on the slide so that the center of the alloy bar is directly aligned with the annular wedge-shaped tip on the lower end face of the copper roller, and then close the furnace door;

[0020] Step 13: Open the external mechanical pump and the first valve on the extraction pipeline to extract the gas from the furnace chamber;

[0021] Step 14: Turn on the cooling system, then turn on the external molecular pump to extract the gas in the furnace chamber until the vacuum level reaches 6×10⁻⁶. -3 Pa;

[0022] Step 15: Close the first valve, molecular pump and mechanical pump on the evacuation line in sequence, and open the second valve on the argon cylinder and the filling line to fill the furnace chamber with argon gas to 0.5 Pa;

[0023] Step 2: High-throughput preparation of magnesium-based hydrogen storage alloy fibers using a melt spin quenching method;

[0024] Step 21: Turn on the power to the copper roller speed controller and set the speed of the copper roller;

[0025] Step 22: Turn on the power on the current controller of the induction coil and adjust the current of the induction coil until the alloy rod melts and a raised molten pool appears on the surface.

[0026] Steps 2 and 3: Turn on the power on the feed device controller and adjust the upward feed speed of the feed device;

[0027] Step 24: When the molten pool of the molten alloy protrusion comes into contact with the wedge-shaped tip of the copper roller, it is drawn into a filament under the tangential force of the high-speed rotating copper roller. Under different linear speeds, feed speeds, induced currents, and alloy compositions, a variety of magnesium-based hydrogen storage alloy fibers can be prepared in one go.

[0028] Step 3: Collection using magnesium-based hydrogen storage alloy fibers;

[0029] Step 31: Adjust the feed device controller to reset to the origin position, turn off the power of the induction coil current controller, turn off the power of the copper roller speed controller, and wait for the melt in the boron nitride crucible to cool down;

[0030] Step 32: Open the first valve on the argon cylinder and the filling pipeline to fill the furnace chamber with argon gas to atmospheric pressure;

[0031] Step 33: Open the furnace door. Different types of magnesium-based hydrogen storage alloy fibers can be collected in the four areas divided by the partition plate. This completes the high-throughput preparation of magnesium-based hydrogen storage alloy fibers.

[0032] Furthermore, the prefabricated magnesium alloy rods placed inside the boron nitride crucible in step one consist of four different compositions.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] 1. This invention can achieve high-throughput preparation of magnesium-based hydrogen storage alloy fibers. It can load four pre-made alloy rods at one time and throw out four magnesium-based hydrogen storage alloy fibers, which greatly improves production efficiency. Moreover, the alloy fibers produced in the same furnace can be precisely controlled to have the same environmental conditions.

[0035] 2. The induction coil current controller and the feed device controller of the present invention can control the alloy rods in the four boron nitride crucibles to have different induction heating temperatures and upward feed speeds, so as to obtain magnesium-based hydrogen storage alloy fibers with different process parameters.

[0036] 3. This invention requires only one copper roller, and annular wedge-shaped sharp corners are provided at different radii of the copper roller, so as to obtain different linear velocities under the condition of having only one copper roller and a certain rotation speed, and obtain magnesium-based hydrogen storage alloy fibers with different morphologies.

[0037] 4. The present invention has four slides at the bottom of the furnace body. The alloy heating and melting system is fixed on the movable slider, which can move freely on the slides and be fixed to obtain different linear velocities. At the same time, the freely movable alloy heating and melting system facilitates the correct placement of prefabricated magnesium alloy rods.

[0038] 5. The present invention has a cross-shaped partition plate installed at the bottom of the furnace body, which divides the furnace cavity into four small furnace cavities, separating the magnesium-based hydrogen storage alloy fibers prepared by different processes so that they do not interfere with each other. Attached Figure Description

[0039] Figure 1 This is a front structural schematic diagram of the apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to the present invention.

[0040] Figure 2 This is a magnified view of a portion of the alloy melting and heating system.

[0041] Figure 3 This is a top view of a partially enlarged view of the alloy melting and heating system.

[0042] Figure 4 yes Figure 1 Top view along AA.

[0043] Figure 5 This is an isometric view of the copper roller.

[0044] Explanation of reference numerals in the attached drawings: 1-furnace door, 2-furnace door lock, 3-observation port, 4-sealing strip, 5-partition plate, 6-furnace cavity, 7-slide rail, 8-first latch, 9-induction coil, 10-boron nitride crucible, 11-substrate, 12-top rod, 13-fixed platform, 14-second latch, 15-bolt, 16-slider, 17-servo motor, 18-copper roller, 19-feeding device, 20-mechanical pump, 21-molecular pump, 22-vacuum line, 23-argon cylinder, 24-filling line, 25-first valve, 26-second valve, 27-pressure gauge, 28-feeding device controller, 29-induction coil current controller, 30-copper roller speed controller. Detailed Implementation

[0045] Specific implementation method one: Combining Figures 1 to 5This embodiment describes a furnace body, which also includes an alloy melting and heating system, a melt spin-quenching and fiber forming system, a parameter control system, a gas protection system, and a cooling system. The furnace body has four furnace chambers 6, each housing an alloy melting and heating system. Each alloy melting and heating system includes an induction coil 9, a boron nitride crucible 10, a substrate 11, a push rod 12, and a fixed platform 13. The induction coil 9 is mounted on the upper outer wall of the boron nitride crucible 10. The substrate 11 is embedded within the boron nitride crucible 10. The push rod 12 passes through the bottom of the boron nitride crucible 10 and abuts against the substrate 11. The lower part of the boron nitride crucible 10 is connected to the fixed platform 13, which is installed within the furnace body and can slide along the length and width of the furnace body. The melt spin-quenching and fiber forming system... The system includes a servo motor 17, a copper roller 18, and a feeding device 19. The servo motor 17 is mounted on the upper surface of the furnace body, and its output shaft passes through the furnace body and connects to the copper roller 18 located inside the furnace body. The feeding device 19 is mounted on the lower end of the fixed platform 13 and connected to the lower end of the push rod 12. The parameter control system includes a feeding device controller 28, an induction coil current controller 29, and a copper roller speed controller 30. The feeding device controller 28 is connected to the feeding device 19, the induction coil current controller 29 is connected to the induction coil 9, and the copper roller speed controller 30 is connected to the servo motor 17, thereby controlling the fiber forming process parameters. The gas protection system and the cooling system are both installed outside the furnace body and connected to the inside of the furnace body, thereby cooling the inside of the furnace body.

[0046] In this embodiment, the feed device controller 28 can control the four feed devices 19 to move upward with the same or different movement speeds, and the induction coil current controller 29 can control the four induction coils 9 to have the same or different heating currents. The power supply voltage is 380VAC and the power is 18kW.

[0047] In this embodiment, the boron nitride crucible 10 has a cylindrical hollow interior and a square base for easy fixation of the crucible. The crucible base is fixed to the fixed platform 13 by a combination of two second buckles 14 and two bolts 15. The fixed platform 13 is connected to the bottom movable slider 16 by a bracket, which can freely move the position of the boron nitride crucible 10 on the slide 7. The four corners of each slider are fixed to the slide by four first buckles 8.

[0048] In this embodiment, the substrate 11 is cylindrical, and its diameter is equivalent to the diameter of the hollow cylinder inside the boron nitride crucible 10. It can push the pre-made alloy rod to move freely up and down inside the boron nitride crucible 10, preventing the molten metal from flowing out from the bottom of the crucible and solidifying before connecting with the top rod 12.

[0049] In this embodiment, the substrate 11 and the push rod 12 are connected in contact under their own gravity.

[0050] Specific Implementation Method Two: Combining Figures 1 to 5 This embodiment describes a furnace body comprising a furnace body, two furnace doors 1, four furnace door locks 2, and four observation ports 3. The two furnace doors 1 are mounted on the furnace body, the four furnace door locks 2 are mounted on the two furnace doors 1, and an observation port 3 is installed on each of the four sides of the furnace body.

[0051] In this embodiment, the furnace body has a cubic structure and is made of stainless steel. To facilitate sample installation and collection of magnesium-based hydrogen storage alloy fiber samples, two furnace doors 1 are provided at the front and rear of the furnace body. Each furnace door is equipped with upper and lower door locks 2. To ensure the overall airtightness of the furnace body, a sealing strip 4 is installed between the furnace door 1 and the furnace cavity 6. Four observation ports 3 are provided on the four sides of the furnace body to facilitate observation of the state of the magnesium-based hydrogen storage alloy fiber preparation process. Other components and connections are the same as in specific embodiment one.

[0052] In this embodiment, the four observation ports 3 are located on the four sides of the furnace body, and their observation angle is directly opposite the contact position between the wedge-shaped tip of the copper roller 18 and the molten alloy pool, so as to facilitate the observation of the state during the preparation of magnesium-based hydrogen storage alloy fibers.

[0053] Specific implementation method three: Combining Figures 1 to 5 To illustrate this embodiment, the furnace body of this embodiment also includes a partition plate 5 and four slide rails 7. The partition plate 5 is installed in the furnace body and divides the furnace cavity 6 of the furnace body into four areas, and each area is equipped with a slide rail 7.

[0054] With this configuration, four slides 7 are installed at the bottom of the furnace cavity 6, close to the partition plate 5. Each slide is equipped with four first latches 8, which can move and fix the position of the alloy melting heating system on the slide. Other components and connections are the same as in specific embodiments one or two.

[0055] Specific implementation method four: Combination Figures 1 to 5 In this embodiment, the partition plate 5 is a cross-shaped partition. This design separates the different types of magnesium-based hydrogen storage alloy fibers prepared in a single process. The cross-shaped partition plate 5 in the lower half of the furnace body divides the furnace cavity 6 into four independent sections. Other components and connections are the same as in specific embodiments one, two, or three.

[0056] In this embodiment, the height of the partition plate 5 is slightly lower than the wedge-shaped tip of the copper roller 18 to ensure a safe distance and prevent the copper roller 18 from colliding with the partition plate 5 during high-speed rotation.

[0057] In this embodiment, the four slides 7 are positioned close to the cross-shaped partition plate 5. The purpose is to ensure that the magnesium-based hydrogen storage alloy fiber has a sufficiently large cooling distance after being pulled out of the molten metal pool, so that the fiber can solidify in mid-air. At the same time, a sufficiently large landing space ensures that different magnesium-based hydrogen storage alloy fibers can be completely separated.

[0058] Specific Implementation Method Five: Combining Figures 1 to 5 This embodiment further includes a plurality of first latches 8, with one first latch 8 installed on each slide rail 7. This arrangement allows the alloy melting heating system to be moved and fixed in position on the slide rail. Other components and connections are the same as in any of the first to fourth embodiments.

[0059] Specific Implementation Method Six: Combination Figures 1 to 5 In this embodiment, the copper roller 18 is disc-shaped, and an annular wedge-shaped tip is provided at the lower end face of the disc, the angle of the annular wedge-shaped tip being 60 degrees.

[0060] In this configuration, the copper roller 18 has four annular wedge-shaped tips at different radii on its disc end face. Each wedge-shaped tip is 60°. During rotation, the copper roller 18 can achieve different linear velocities at different radii. The copper roller 18 is suspended from the upper wall of the furnace, and the tips of its wedge-shaped tips contact the molten alloy pool, drawing out magnesium-based hydrogen storage alloy fibers. In this embodiment, the feeding device 19 is connected to the substrate 11 and the push rod 12, propelling the pre-formed alloy rod, substrate 11, and push rod 12 upwards together. Other components and connections are the same as in any of the specific embodiments one to five.

[0061] The induction coil 9 is wound around the periphery of the boron nitride crucible 10. The upper part of the boron nitride crucible 10 is cylindrical, and the base is square. The substrate 11 can move freely inside the crucible and is placed between the alloy rod and the top rod 12.

[0062] Specific implementation method seven: Combination Figures 1 to 5 This embodiment describes a gas protection system comprising a mechanical pump 20, a molecular pump 21, an extraction pipeline 22, an argon cylinder 23, a filling pipeline 24, a first valve 25, a second valve 26, and a pressure gauge 27. The molecular pump 21, located outside the furnace body, is connected to the interior of the furnace body via the extraction pipeline 22. The first valve 25 is installed on the extraction pipeline 22. The mechanical pump 20 is connected to the extraction pipeline 22. The argon cylinder 23 is connected to the interior of the furnace body via the filling pipeline 24. The second valve 26 and the pressure gauge 27 are installed on the filling pipeline 24.

[0063] In this configuration, the mechanical pump 20 and the molecular pump 21 are placed outside the furnace body. One end of the extraction pipe 22 is connected to the furnace cavity 6, and the other end is connected to the mechanical pump 20 and the molecular pump 21. The aforementioned argon cylinder 23 is placed outside the furnace body. One end of the filling pipe 24 is connected to the furnace cavity 6, and the other end is connected to the argon cylinder 23. Valves 25 and 26 are respectively placed on the extraction pipe 22 and the filling pipe 24. The pressure gauge 27 is located above the furnace body to monitor the gas pressure inside the furnace cavity 6. Other components and connections are the same as in any one of the specific embodiments one to six.

[0064] In this embodiment, argon gas is introduced into the argon cylinder 23 as a protective gas. During the preparation of magnesium-based hydrogen storage alloy fiber, the pre-made magnesium alloy rod is heated and melted, which is prone to oxidation and combustion.

[0065] Specific implementation method eight: Combination Figures 1 to 5 This embodiment describes a cooling system comprising a water tank, a water pump, and water pipes. One end of the water pipe connects the water tank to the water pump, and the other end connects to the molecular pump 21. This configuration facilitates cooling of the molecular pump 21. Other components and connections are the same as in any of the specific embodiments one through seven.

[0066] Specific Implementation Method Nine: Combining Figures 1 to 5 This embodiment describes a forming method that includes the following steps:

[0067] Step 1: Place the precast alloy rods and fill the furnace with protective gas;

[0068] Step 11: After grinding off the surface oxide scale and cleaning the pre-made magnesium alloy rods, place them into the interiors of four boron nitride crucibles 10 respectively, and adjust the position of the induction coil 9 to the upper middle part of the outer periphery of the boron nitride crucible 10.

[0069] Steps 1 and 2: Manually adjust the position of the alloy bar on the slide 7 so that the center of the alloy bar is directly aligned with the annular wedge-shaped tip on the lower end face of the copper roller 18, and then close the furnace door.

[0070] Step 13: Open the external mechanical pump 20 and the first valve 25 on the gas extraction pipeline 22 to extract the gas from the furnace chamber;

[0071] Step 14: Turn on the cooling system, then turn on the external molecular pump 20 to extract the gas in the furnace chamber 6 until the vacuum degree reaches 6×10. -3 Pa;

[0072] Step 15: Close the first valve 25, molecular pump 21 and mechanical pump 20 on the evacuation pipeline 22 in sequence, and open the second valve 26 on the argon cylinder 23 and the filling pipeline 24 to fill the furnace chamber 6 with argon gas to 0.5 Pa;

[0073] Step 2: High-throughput preparation of magnesium-based hydrogen storage alloy fibers using a melt spin quenching method;

[0074] Step 21: Turn on the power to the copper roller speed controller 30 and set the speed of the copper roller 18;

[0075] Step 22: Turn on the power supply on the current controller 29 of the induction coil 9, and adjust the current of the induction coil 9 until the alloy rod melts and a raised molten pool appears on the surface.

[0076] Steps 2 and 3: Turn on the power on the feed device controller 28 and adjust the upward feed speed of the feed device 19;

[0077] Step 24: When the molten pool of the molten alloy protrusion comes into contact with the wedge-shaped tip of the copper roller 18, it is drawn into wire under the action of the tangential force of the high-speed rotating copper roller 18. Under different linear speeds, feed speeds, induced currents, and alloy compositions, a variety of magnesium-based hydrogen storage alloy fibers can be prepared in one go.

[0078] Step 3: Collection using magnesium-based hydrogen storage alloy fibers;

[0079] Step 31: Adjust the feed device controller 19 to reset to the origin position, turn off the power of the induction coil current controller 29, turn off the power of the copper roller speed controller 30, and wait for the melt in the boron nitride crucible 10 to cool down.

[0080] Step 32: Open the first valve 25 on the argon cylinder 23 and the filling pipeline 22 to fill the furnace chamber 6 with argon gas to atmospheric pressure;

[0081] Step 33: Open furnace door 1. Different types of magnesium-based hydrogen storage alloy fibers can be collected in the four areas divided by partition plate 5. This completes the high-throughput preparation of magnesium-based hydrogen storage alloy fibers.

[0082] Specific Implementation Method Ten: Combining Figures 1 to 5 In this embodiment, the prefabricated magnesium alloy rods placed inside the boron nitride crucible 10 in step one are of four different compositions. This arrangement facilitates the preparation of four different alloy fibers. Other compositions and connections are the same as in any of embodiments one through nine.

[0083] Detailed Implementation Method Eleven: Combining Figures 1 to 5In this embodiment, the center of the alloy rod in steps one and two is manually adjusted on the slide rail to align with the annular wedge-shaped tip at different positions on the lower end face of the copper roller. Different linear velocities are obtained by changing the radius. This setup increases the linear velocity, reducing the fiber diameter. Furthermore, the linear velocity affects the continuity of fiber preparation, thus affecting its length. Changing the radius to obtain different linear velocities facilitates the preparation of alloy fibers with four different diameters and lengths. Other components and connections are the same as in any of embodiments one through ten.

[0084] Specific Implementation Method Twelve: Combining Figures 1 to 5 In this embodiment, the induction coil current controller in step two can adjust the four induction coils to have the same or different induced current magnitudes. This configuration, by adjusting the induced current magnitude, changes the temperature of the master alloy. Increasing the master alloy temperature increases the melt viscosity, improves the stability of the molten pool, and is beneficial for obtaining long and thin fibers. The longer solidification time provides ample time for adjusting the shape of the alloy melt, resulting in more rounded fibers. Therefore, it is possible to prepare alloy fibers with four different diameters, lengths, and cross-sectional roundness. Other components and connections are the same as in any of embodiments one through eleven.

[0085] Detailed Implementation Method Thirteen: Combining Figures 1 to 5 In this embodiment, the feed device controller in steps two and three can adjust the four feed devices to have the same or different upward feed speeds. With this configuration, slightly increasing the feed speed of the master alloy significantly increases the fiber diameter, even resulting in ribbon-like fibers and altering the fiber morphology. This facilitates the preparation of alloy fibers with four different diameters and appearances. Other components and connections are the same as in any of embodiments one through twelve.

[0086] The following will combine Figures 1 to 5 The embodiments of the present invention will be described in detail below.

[0087] This invention places four pre-made magnesium alloy rods, after polishing and cleaning, into four boron nitride crucibles, facing the wedge-shaped tip of a copper roller. The position of the alloy rods can be freely moved on a slide rail by a sliding slider to obtain different linear velocities. The furnace door is closed, the gas in the furnace chamber is extracted, and argon is introduced. The rotation speed of the copper roller is controlled by a servo motor through a copper roller speed controller, and the current of the four induction coils is controlled by an induction coil current controller. When a raised molten pool appears on the surface of the molten alloy, the feed device controller is activated and the upward movement speed of the four feed devices is adjusted. When the wedge-shaped tip of the high-speed rotating copper roller is in contact with the raised molten pool of the molten alloy, four kinds of magnesium-based hydrogen storage alloy fibers with different preparation processes and alloy compositions can be obtained simultaneously, improving the preparation efficiency and realizing high-throughput preparation of magnesium-based hydrogen storage alloy fibers.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers, comprising a furnace body, characterized in that: It also includes an alloy melting heating system, a melt spin quenching fiber forming system, a parameter control system, a gas protection system and a cooling system. The furnace body has four furnace chambers (6), and each furnace chamber (6) is equipped with an alloy melting heating system. The alloy melting heating system includes an induction coil (9), a boron nitride crucible (10), a substrate (11), a push rod (12), and a fixed platform (13). The induction coil (9) is fitted on the upper outer wall of the boron nitride crucible (10). The substrate (11) is embedded in the boron nitride crucible (10). The push rod (12) passes through the bottom of the boron nitride crucible (10) and abuts against the substrate (11). The lower part of the boron nitride crucible (10) is connected to the fixed platform (13). The fixed platform (13) is installed in the furnace body and can slide along the length and width of the furnace body. The melt spin quenching fiber forming system includes a servo motor (17), a copper roller (18), and a feeding device (19). The servo motor (17) is installed on the upper end face of the furnace body, and the output shaft of the servo motor (17) passes through the furnace body and is connected to the copper roller (18) located inside the furnace body. The feeding device (19) is installed at the lower end of the fixed platform (13) and connected to the lower end of the top rod (12). The copper roller (18) is disc-shaped, and an annular wedge-shaped tip is provided at the lower end face of the disc. There is one copper roller (18), which is located above the four furnace chambers (6). During operation, the center of the alloy rod in the boron nitride crucible (10) is aligned with the annular wedge-shaped tip at the lower end face of the copper roller (18). The parameter control system includes a feed device controller (28), an induction coil current controller (29), and a copper roller speed controller (30). The feed device controller (28) is connected to the feed device (19), the induction coil current controller (29) is connected to the induction coil (9), and the copper roller speed controller (30) is connected to the servo motor (17) to realize the control of fiber forming process parameters; Both the gas protection system and the cooling system are installed outside the furnace body and connected to the inside of the furnace body to achieve cooling of the furnace body.

2. The apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to claim 1, characterized in that: The furnace body includes the furnace body, two furnace doors (1), four furnace door locks (2) and four observation ports (3). The two furnace doors (1) are installed on the furnace body, and the four furnace door locks (2) are installed on the two furnace doors (1). An observation port (3) is installed on each of the four sides of the furnace body.

3. The apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to claim 2, characterized in that: The furnace body also includes a partition plate (5) and four slides (7). The partition plate (5) is installed in the furnace body and divides the furnace cavity (6) of the furnace body into four areas, with a slide (7) installed in each area.

4. The apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to claim 3, characterized in that: The partition (5) is a cross-shaped partition.

5. The apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to claim 4, characterized in that: The furnace body also includes multiple first latches (8), with one first latch (8) installed on each slide (7).

6. The apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to claim 1 or 5, characterized in that: The angle of the annular wedge-shaped tip is 60 degrees.

7. The apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to claim 6, characterized in that: The gas protection system includes a mechanical pump (20), a molecular pump (21), a gas extraction line (22), an argon cylinder (23), a gas filling line (24), a first valve (25), a second valve (26), and a pressure gauge (27). A molecular pump (21) located outside the furnace body is connected to the inside of the furnace body through a gas extraction pipe (22). A first valve (25) is provided on the gas extraction pipe (22). A mechanical pump (20) is connected to the gas extraction pipe (22). An argon cylinder (23) is connected to the inside of the furnace body through a gas filling pipe (24). A second valve (26) and a pressure gauge (27) are installed on the gas filling pipe (24).

8. The apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to claim 7, characterized in that: The cooling system includes a water tank, a water pump and a water pipe. The water tank and the water pump are connected by one end of the water pipe and the other end of the water pipe is connected to the molecular pump (21).

9. A method for preparing magnesium-based hydrogen storage alloy fibers using the apparatus for high-throughput preparation of magnesium-based hydrogen storage alloy fibers according to claim 8, characterized in that: It includes the following steps: Step 1: Place the precast alloy rods and fill the furnace with protective gas; Step 11: After grinding off the surface oxide scale and cleaning the pre-made magnesium alloy rod, place it into the interior of four boron nitride crucibles (10) respectively, and adjust the position of the induction coil (9) to the upper middle part of the outer periphery of the boron nitride crucible (10); Step 1 and 2: Manually adjust the position of the alloy rod on the slide (7) so that the center of the alloy rod is directly opposite the annular wedge-shaped tip of the lower end face of the copper roller (18), and close the furnace door; Step 13: Open the first valve (25) on the external mechanical pump (20) and the gas extraction pipeline (22) to extract the gas in the furnace chamber; Step 14: Turn on the cooling system, and then turn on the external molecular pump (20) to extract the gas in the furnace chamber (6) until the vacuum degree reaches 6×10 -3 Pa; Step 15: Close the first valve (25), molecular pump (21) and mechanical pump (20) on the gas extraction pipeline (22) in sequence, and open the second valve (26) on the argon cylinder (23) and the gas filling pipeline (24) to fill the furnace chamber (6) with argon gas to 0.5 Pa; Step 2: High-throughput preparation of magnesium-based hydrogen storage alloy fibers using a melt spin quenching method; Step 21: Turn on the power to the copper roller speed controller (30) and set the speed of the copper roller (18); Step 22: Turn on the power supply on the current controller (29) of the induction coil (9), and adjust the current of the induction coil (9) until the alloy rod melts and a raised molten pool appears on the surface; Steps 2 and 3: Turn on the power on the feed device controller (28) and adjust the upward feed speed of the feed device (19); Step 24: When the molten pool of the molten alloy protrusion comes into contact with the wedge-shaped tip of the copper roller (18), it is drawn into a filament under the action of the tangential force of the high-speed rotating copper roller (18). Under different linear speeds, feed speeds, induced currents, and alloy compositions, a variety of magnesium-based hydrogen storage alloy fibers can be prepared in one go. Step 3: Collection using magnesium-based hydrogen storage alloy fibers; Step 31: Adjust the feed device controller (19) to reset to the origin position, turn off the power of the induction coil current controller (29), turn off the power of the copper roller speed controller (30), and wait for the melt in the boron nitride crucible (10) to cool down; Step 32: Open the first valve (25) on the argon cylinder (23) and the filling pipeline (22) to fill the furnace chamber (6) with argon gas to atmospheric pressure; Step 33: Open the furnace door (1). Different types of magnesium-based hydrogen storage alloy fibers can be collected in the four areas divided by the partition plate (5). This completes the high-throughput preparation of magnesium-based hydrogen storage alloy fibers.

10. The forming method according to claim 9, characterized in that: The prefabricated magnesium alloy rods placed inside the boron nitride crucible (10) in step one are of four different compositions.

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