High-purity magnesium preparation system and preparation process

Abstract

The invention relates to a high-purity magnesium preparation system and process, and belongs to the technical field of magnesium metal smelting, the high-purity magnesium preparation system comprises a heating assembly and a curing box, the heating assembly comprises an inner crucible and a heating device for heating the inner crucible, and a middle cover plate covers the upper portion of the inner crucible; the two sides of the middle cover plate are each connected with a side cover plate in a penetrating mode. Two curing boxes are arranged outside the heating assembly, sleeves are connected to the curing boxes in a penetrating mode, and the side cover plates cover openings in the upper ends of the sleeves. A vertical hole communicated with the internal crucible is formed in the bottom surface of the middle cover plate, a discharge pipe communicated with the sleeve is arranged at the bottom of the side cover plate, and the vertical hole is communicated with the discharge pipe. According to the method, the raw material metal magnesium ingot is heated through the two temperature zones, gasified zinc and gasified magnesium are separated step by step, the prepared high-purity magnesium does not contain zinc, and the purity of the magnesium is further improved.

Description

Technical Field

[0001] The present application belongs to the technical field of metal magnesium smelting, and specifically relates to a high-purity magnesium preparation system and preparation process. Background Art

[0002] Magnesium metal has a wide range of applications in aerospace, automotive, medical, metallurgical and environmental protection. Pure magnesium can be used to manufacture medical implants such as bone screws and stents due to its unique biodegradability and compatibility. They can gradually degrade in the body, avoiding the need for secondary surgery to remove them. At the same time, pure magnesium can also be used as a strong reducing agent to produce other metals such as titanium, zirconium, beryllium, uranium and hafnium.

[0003] In the existing national standards, the highest grade of high-purity magnesium is Mg9999, in which the mass fraction of magnesium is not less than 99.99%, and it also contains impurities such as iron, silicon, copper, nickel, aluminum, and manganese. Summary of the invention

[0004] The technical problem to be solved by the present application is: to overcome the deficiencies of the prior art and to provide a high-purity magnesium preparation system and preparation process. The present application heats the raw metal magnesium ingot through two temperature zones, and gradually separates the vaporized zinc and the vaporized magnesium. The prepared high-purity magnesium does not contain zinc, thereby further improving the purity of the magnesium.

[0005] The technical solution adopted by this application to solve the problems existing in the prior art is:

[0006] A high-purity magnesium preparation system comprises a heating assembly and a curing box. The heating assembly comprises an internal crucible and a heating device for heating the internal crucible. An intermediate cover plate is provided above the internal crucible. Two sides of the intermediate cover plate are respectively connected through a side cover plate.

[0007] Two curing boxes are arranged outside the heating assembly, sleeves are connected through the curing boxes, and side cover plates are arranged at the open ends of the sleeves.

[0008] A vertical hole connected to the internal crucible is arranged on the bottom surface of the middle cover plate, a discharge pipe connected to the sleeve is arranged on the bottom of the side cover plate, and the vertical hole is connected to the discharge pipe.

[0009] Preferably, the top surface of the middle cover plate is recessed with a rotating groove coaxially connected to the vertical hole, a regulating valve is rotatably connected inside the rotating groove, an L-shaped hole is provided on the regulating valve, two openings of the L-shaped hole are respectively located on the bottom surface and the circumferential side surface of the regulating valve, and the opening located on the bottom surface is coaxially connected to the vertical hole.

[0010] The regulating valve is rotated to adjust the openings on the circumferential side surfaces to be respectively connected with the discharge pipes on the two side cover plates.

[0011] Preferably, the two side cover plates are symmetrically arranged on both sides of the middle cover plate, and the side cover plates are fixedly connected to the middle cover plate through an intermediate bridge. A through hole is provided inside the middle bridge, and both sides of the through hole are respectively connected to the discharge pipe and the rotating groove of the middle cover plate.

[0012] Preferably, a positioning plate is convexly provided on the top surface of the regulating valve, and the positioning plate is arranged opposite to the horizontal hole in the L-shaped hole.

[0013] Preferably, an arc-shaped pressure ring is fixed on the top surface of the middle cover plate, and the bottom surface of the arc-shaped pressure ring top plate abuts against the top surface of the regulating valve. The arc-shaped pressure ring limits the rotation angle of the regulating valve. When the positioning plate abuts against the end of the arc-shaped pressure plate, the horizontal hole of the L-shaped hole is connected with the through hole inside the middle bridge.

[0014] Preferably, a material taking window is provided on the side wall of the curing box, and a material taking sealing plate is provided outside the material taking window.

[0015] Preferably, a crystallizer is provided inside the sleeve of one of the curing boxes, and a middle through hole is provided on the crystallizer, and the middle through hole is coaxially connected with the discharge pipe of the corresponding side cover plate.

[0016] Preferably, the upper portion of the middle through hole is funnel-shaped.

[0017] Preferably, a correspondingly arranged cutting assembly is provided below the crystallizer.

[0018] A high-purity magnesium preparation process, based on the above-mentioned high-purity magnesium preparation system, includes the following arrangements:

[0019] S1. Put the metal magnesium ingot into the inner crucible, then cover the middle cover plate, and heat the inner crucible by a heating device.

[0020] S2. Set the heating temperature to 930°C-960°C, and adjust the regulating valve to connect the L-shaped hole to the discharge pipe of the upper side cover plate of the solidification box without a crystallizer. In this temperature range, the zinc contained in the metal magnesium ingot melts and evaporates to form gaseous metal zinc, which then flows into the solidification box, condenses and solidifies to form pure zinc.

[0021] S3. After no new metal solidifies in the solidification box in step S2, the temperature of the internal crucible is heated to 1100°C-1300°C, and the regulating valve is adjusted to connect the L-shaped hole to the discharge pipe of the upper side cover plate of the solidification box provided with a crystallizer. In this temperature range, the magnesium contained in the metal magnesium ingot evaporates to form other metal magnesium, which then flows into the crystallizer to cool and liquefy, and continues to cool and solidify in the process of flowing downward through the middle through hole to form a metal rod, which is then cut by the cutting assembly.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The raw material magnesium ingot is heated in two temperature zones, vaporized zinc and vaporized magnesium are separated step by step, and the vaporized magnesium is collected separately. The solidified magnesium metal does not contain zinc and other metal impurities, thereby preparing high-purity magnesium.

[0024] (2) The internal crucible and the solidification box are placed in a vacuum environment by a vacuum pump, which prevents magnesium from coming into contact with air during the purification process and improves the purity of the final product.

[0025] (3) In the process of preparing high-purity magnesium, high-purity zinc can also be obtained as a by-product, thereby improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 This is the first structural diagram of a high-purity magnesium preparation system of this application.

[0028] Figure 2 This is the second structural diagram of a high-purity magnesium preparation system of this application.

[0029] Figure 3 This is a structural diagram of a heating assembly in a high-purity magnesium preparation system in this application.

[0030] Figure 4 for Figure 3 An exploded diagram of

[0031] Figure 5 for Figure 3 The first cross-sectional view of

[0032] Figure 6 for Figure 3 The second cross-sectional view of

[0033] Figure 7 This is the furnace structure diagram in the heating assembly.

[0034] Figure 8 for Figure 7 A cross-sectional view of

[0035] Fig. 9 This is the first structural diagram of the regulating valve in the heating assembly.

[0036] Fig.10 This is the second structural diagram of the regulating valve in the heating assembly.

[0037] Fig.11 This is a structural diagram of a curing box in a high-purity magnesium preparation system in this application.

[0038] Fig.12 is a cross-sectional view of a solidification box with a crystallizer.

[0039] Fig.13 This is a cross-sectional view of a solidification box without a crystallizer.

[0040] Fig.14 The structure diagram of the crystallizer is shown in Figure 2.

[0041] Fig.15 This is the structural diagram of the cutting assembly inside the curing box.

[0042] Fig.16 for Fig.15 A partial cross-sectional view of .

[0043] In the figure: 1-housing, 101-support ring, 102-first through hole, 103-air inlet, 2-middle crucible, 201-second through hole, 3-inner crucible, 4-electromagnetic induction coil, 5-sealing ring, 501-insertion ring, 502-first strap, 503-exhaust hole, 6-middle cover plate, 601-vertical hole, 602-first insulation cavity, 603-arc pressure ring, 7-regulating valve, 701-L-shaped hole, 702-positioning plate, 703-handle, 8-gas tank, 9-exhaust pipe, 1 0-gas drive device, 11-reflux pipe, 12-side cover plate, 1201-second strap, 1202-discharge pipe, 1203-second insulation chamber, 13-middle bridge, 14-curing box, 1401-sleeve, 1402-material removal door plate, 15-crystallizer, 1501-middle through hole, 16-telescopic mechanism, 17-cutter, 18-support frame, 1801-guide tube, 1802-cutting groove, 1803-fixed frame, 1804-guide groove, 19-vacuum pump, 20-exhaust pipe. DETAILED DESCRIPTION

[0044] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present application.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] The following is a further detailed description of a high-purity magnesium preparation system and preparation process of the present application in conjunction with the accompanying drawings, but it is not intended to limit the present application.

[0048] Depend on Figure 1 as well as Figure 2 As shown, a high-purity magnesium preparation system includes a heating assembly and a curing box 14. The heating assembly includes an internal crucible 3 and a heating device for heating the internal crucible 3. The heating device in this embodiment adopts an electromagnetic induction coil 4 that is sleeved on the outside of the internal crucible 3 to heat the internal crucible 3 by electromagnetic induction heating.

[0049] An intermediate cover plate 6 is provided above the inner crucible 3 to seal the upper part of the inner crucible 3. The connection can be made by relying on the deadweight of the intermediate cover plate 6, or a detachable connection mechanism such as a pressure plate or fastening bolts can be added between the two.

[0050] The middle cover plate 6 is connected to a side cover plate 12 on both sides. The two side cover plates 12 are symmetrically arranged on both sides of the middle cover plate 6, and the side cover plates 12 and the middle cover plate 6 are fixedly connected through the middle bridge 13. The middle bridge 13 has a through hole inside, and the two sides of the through hole are connected to the discharge pipe 1202 and the rotating groove of the middle cover plate 6 respectively.

[0051] In this embodiment, four types of magnesium ingots with grades of Mg9980, Mg9990, Mg9995A or Mg9995B are used. Among the other metal elements contained in these magnesium ingots, only zinc has a boiling point lower than that of magnesium. The boiling point of zinc is 907°C, and the boiling point of magnesium is 1090°C. The boiling points of other metal elements are all higher than the boiling point of magnesium.

[0052] Therefore, in the process of heating and gasification, zinc is gasified first. In order to obtain high-purity gasified magnesium, the gasified zinc needs to be separated. Therefore, two curing boxes 14 are provided outside the heating assembly of this embodiment. A sleeve 1401 is connected through the curing box 14, and the side cover plate 12 is provided at the open upper end of the sleeve 1401. The two curing boxes 14 are used to solidify zinc and magnesium respectively. In this way, in the process of preparing high-purity magnesium, high-purity zinc byproducts can also be obtained, thereby improving economic benefits.

[0053] The bottom surface of the middle cover plate 6 is provided with a vertical hole 601 which is connected to the internal crucible 3, and the bottom of the side cover plate 12 is provided with a discharge pipe 1202 which is connected to the sleeve 1401. The vertical hole 601 is connected to the discharge pipe 1202. In order to improve the sealing effect of the side baffle 12 on the sleeve 1401, a second strap 1201 is sleeved on the outer circumferential surface of the side baffle 12, and the bottom surface of the second strap 1201 abuts against the top surface of the sleeve 1401.

[0054] The top surface of the intermediate cover plate 6 is concavely provided with a rotating groove coaxially connected to the vertical hole 601, and a regulating valve 7 is rotatably connected inside the rotating groove. The main body of the regulating valve 7 is cylindrical and easy to rotate. The regulating valve 7 is provided with an L-shaped hole 701, which is composed of a vertical cavity and a horizontal cavity that are mutually connected. The two openings of the L-shaped hole 701 are respectively located on the bottom surface and the circumferential side surface of the regulating valve 7. The opening of the vertical cavity on the bottom surface is coaxially connected to the vertical hole 601. And the inner diameter of the vertical cavity is greater than or equal to the inner diameter of the vertical hole 601.

[0055] The regulating valve 7 is rotated to adjust the openings on the circumferential side to be respectively connected to the discharge pipes 1202 on the two side cover plates 12. By rotating the regulating valve 7, it is possible to change which solidification box 14 the internal crucible 3 is connected to, thereby solidifying zinc and magnesium respectively.

[0056] Since zinc and magnesium are relatively active metals, they are easy to react chemically with oxygen, nitrogen and even carbon dioxide in the air at high temperatures. In order to ensure the purity of magnesium, the present embodiment adds a vacuum pump 19 and an exhaust pipe 20 connected to the vacuum pump 19. The exhaust pipe 20 is connected to the two solidification boxes 14, and is also connected to the internal crucible 3 through the discharge pipe 1202, the L-shaped hole 701 and the vertical hole 601. When the magnesium ingot is placed in the internal crucible 3 and the middle cover plate 6 and the side cover plate 12 are covered, the vacuum pump 19 is started to extract the air inside the internal crucible 3 and the two intermediate boxes 14 to form a vacuum environment, thereby avoiding the contact of vaporized zinc and magnesium with the air and improving the purity of the finished product. At the same time, since the intermediate box 14 and the internal crucible 3 are both evacuated, but the internal temperature of the intermediate box 14 is much lower than the temperature in the internal crucible 3, there is a pressure difference between the two, ensuring that the vaporized metal in the internal crucible 3 flows toward the inside of the intermediate box 14. This eliminates the need to add gas delivery devices such as fans or pumps in the middle to avoid solidification of vaporized metal on the blades or impellers of these devices, thereby improving the reliability of the entire system.

[0057] In order to know which curing box 14 the horizontal cavity in the L-shaped hole corresponds to, in this embodiment, a positioning plate 702 is convexly provided on the top surface of the regulating valve 7. The positioning plate 702 is arranged opposite to the horizontal cavity in the L-shaped hole 701, and the inner end point of the positioning plate 702 is located at the center of the top surface of the regulating valve 7. A handle 703 is fixed at the center of the top surface of the regulating valve 7 for rotating the regulating valve 7.

[0058] In order to prevent the regulating valve 7 from moving upward, an arc-shaped pressure ring 603 is fixed on the top surface of the intermediate cover plate 6. The arc of the arc-shaped pressure ring 603 is less than 180°, and its cross-sectional shape is an inverted L-shaped, which protects the vertical plates and the top plate connected to each other. The bottom surface of the top plate of the arc-shaped pressure ring 603 abuts against the top surface of the regulating valve 7, and the bottom of the vertical plate of the arc-shaped pressure ring 603 is fixedly connected to the intermediate cover plate 6. The arc-shaped pressure ring 603 limits the rotation angle of the regulating valve 7. When the positioning plate 702 abuts against the end of the arc-shaped pressure plate 603, the horizontal hole of the L-shaped hole 701 is connected to the through hole inside the intermediate bridge 13. When the positioning plate 702 abuts against the two end surfaces of the arc-shaped pressure plate 603, the horizontal holes of the L-shaped hole 701 are connected to the two curing boxes 14 respectively.

[0059] A material taking window is provided on the side wall of the curing box 14, and a material taking blocking plate 1402 is provided outside the material taking window.

[0060] In the prior art, the gasified magnesium is cooled to form irregular block metal, which is then melted and semi-continuously cast to form magnesium rods. This method not only increases energy consumption, but also during the semi-continuous casting process, the liquid magnesium metal has the opportunity to come into contact with air, which is easily oxidized to form magnesium oxide, etc., which reduces the purity of the magnesium.

[0061] In this embodiment, Fig.12 As shown, a crystallizer 15 is provided inside the sleeve 1401 of one of the curing boxes 14, and the curing box 14 is used to solidify magnesium. The crystallizer 15 is provided with a middle through hole 1501, and the middle through hole 1501 is coaxially connected with the discharge pipe 1202 of the corresponding side cover plate 12. The middle through hole 1501 is funnel-shaped above, and the vaporized magnesium is injected into the upper part of the middle through hole 1501 of the crystallizer 15, the temperature is reduced, and liquefaction is carried out. The liquefied magnesium accumulates in the funnel-shaped area of ​​the middle through hole 1501, and then gradually flows downward. During the downward flow, the temperature further decreases, and then solidifies to form a metal magnesium rod.

[0062] Heat sinks are added to the outside of the solidification box 14 to cool the area by air cooling. In order to control the area where the metal magnesium is liquefied and solidified, a heater can be provided on the crystallizer 15 to heat the funnel-shaped area of ​​the middle through hole 1501 so that the temperature in this section ensures the liquefaction of the gasified magnesium.

[0063] A corresponding cutting assembly is arranged below the crystallizer 15 to cut the magnesium rod regularly. Fig.15 as well as Fig.16 As shown, in this embodiment, the cutting device includes a telescopic mechanism 16 fixed on the inner wall of the curing box 14 and a support frame 18. The telescopic mechanism 16 adopts an electric cylinder, and a cutter 17 is connected to the end of the telescopic rod. The support frame 18 includes a fixed frame 1803 fixedly connected to the inner wall of the curing box 14, and a guide tube 1801 is fixed to one end of the fixed frame 1803. The guide tube 1801 is coaxially arranged below the middle through hole 1501, and a cutting groove 1802 is arranged in the middle of the guide tube 1801. The cutting groove 1802 is arranged corresponding to the cutter 17. A guide groove 1804 is respectively provided on both sides of the guide tube 1801, and the cutter 17 is horizontally slidably arranged inside the guide groove 1804.

[0064] The solidified magnesium metal rod enters the guide tube 1801. After moving down for a certain period of time, the telescopic mechanism 16 controls the cutter 17 to move forward, and the cutter 17 is inserted into the guide tube 1801 through the cutting groove 1802 to cut the magnesium metal rod. During the cutting process, the guide tube 1801 limits the magnesium metal rod and optimizes the cutting effect.

[0065] During the process of transporting the vaporized metal from the internal crucible 3 to the solidification box 14, if the temperature drops, the vaporized metal may liquefy or even solidify, which may easily clog the inside of the pipeline and be difficult to clean.

[0066] In order to avoid the above phenomenon, in this embodiment, the heating assembly also includes an outer shell 1 and an intermediate crucible 2. The intermediate crucible 2 is arranged on the outside of the internal crucible 3, and the outer shell 1 is arranged on the outside of the intermediate crucible 2. The outside of the outer shell 1 is wrapped with insulation facilities such as insulation cotton.

[0067] There is a cavity between the inner crucible 3 and the middle crucible 2, and there is a cavity between the middle crucible 2 and the outer shell 1. At the same time, for limiting support, a plurality of layers of spaced support rings 101 are provided between the inner wall of the outer shell 1 and the outer wall of the middle crucible 2. The electromagnetic induction coil 4 is located between the inner crucible 3 and the middle crucible 2, and the middle crucible 2 and the inner crucible 3 can be graphite crucibles.

[0068] An annular sealing ring 5 is provided on the gap between the inner crucible 3, the intermediate crucible 2 and the upper end of the outer shell 1. The insert ring 501 at the bottom of the sealing ring 5 is inserted into the gap between the inner crucible 3 and the intermediate crucible 2. The bottom surface of the first strap 502 on the sealing ring 5 abuts against the top surfaces of the outer shell 1, the intermediate crucible 2 and the inner crucible 3. An exhaust hole 503 is provided on the sealing ring 5, and the exhaust hole 503 is connected to the gap between the inner crucible 3 and the intermediate crucible 2.

[0069] An air inlet 103 is provided above the outer shell 1, a first through hole 102 is provided on the support ring 101, and a plurality of second through holes 201 are provided at the bottom of the intermediate crucible 2. The second through holes 201 connect the cavity between the outer shell 1 and the intermediate crucible 2 and the cavity between the intermediate crucible 2 and the inner crucible 3.

[0070] The vertical hole 601 of the middle cover plate 6 and the outer interval of the groove are surrounded by a first insulation cavity 602, the discharge pipe 1202 of the side cover plate 12 is externally sleeved with a second insulation cavity 1203 arranged at intervals, and a through insulation cavity is provided inside the middle bridge 13, which connects the first insulation cavity 602 with the second insulation cavity 1203.

[0071] The first heat preservation chamber 602 has an opening at the bottom, which is connected to the exhaust hole 503. A gas storage tank 8 is provided outside the heating assembly, and an exhaust pipe 9 and a return pipe 11 are connected to the outside of the gas storage tank 8. The end of the exhaust pipe 9 is connected to the air inlet 103 on the housing 1, and the return pipe 11 is connected to the second heat preservation chamber 1203. A gas driving device 10 is connected in series to the exhaust pipe 9 or the return pipe 11, and the gas driving device 10 can be a drainage fan or an air pump.

[0072] During operation, inert gas, such as nitrogen or carbon dioxide, is added to the gas storage tank 8. The gas driving device 10 discharges the gas inside the gas storage tank 8 into the cavity between the outer shell 1 and the intermediate crucible 2 through the exhaust pipe 9 and the air inlet 103. The gas moves downward and flows into the cavity between the intermediate crucible 2 and the inner crucible 3 through the first through hole 102 and the second through hole 201, and then is discharged into the first heat preservation chamber 602 through the exhaust hole 503. The gas is preheated in the cavity between the outer shell 1 and the intermediate crucible 2, continues to be heated in the cavity between the intermediate crucible 2 and the inner crucible 3, and then flows into the first heat preservation chamber 602, the through heat preservation chamber inside the intermediate bridge 13, and the second heat preservation chamber 1203 for heat preservation, so as to prevent the gasified metal from cooling and liquefying.

[0073] A high-purity magnesium preparation process, based on the above-mentioned high-purity magnesium preparation system, includes the following arrangements:

[0074] S1, placing a metal magnesium ingot into the inner crucible 3, then covering the middle cover plate 6, and heating the inner crucible 3 by a heating device;

[0075] S2, setting the heating temperature to 930°C-960°C, adjusting the regulating valve 7 to connect the L-shaped hole 701 to the discharge pipe 1202 of the upper side cover plate 12 of the solidification box 14 without the crystallizer 15, in which the zinc contained in the metal magnesium ingot melts and evaporates to form gaseous metal zinc, which then flows into the solidification box 14, condenses and solidifies to form pure zinc;

[0076] S3, after no new metal solidification is added to the solidification box 14 in step S2, the temperature of the internal crucible 3 is heated to 1100°C-1300°C, and the L-shaped hole 701 is connected to the discharge pipe 1202 of the upper side cover plate 12 of the solidification box 14 provided with the crystallizer 15 by adjusting the regulating valve 7. In this temperature range, the magnesium contained in the metal magnesium ingot evaporates to form other metal magnesium, and then flows into the crystallizer 15 to cool and liquefy, and continues to cool and solidify during the downward flow through the middle through hole 1501 to form a metal magnesium rod, which is then cut by the cutting assembly. Since the metal magnesium rod does not contain any other metal elements and solidifies in a vacuum environment, there is no magnesium compound, and the mass fraction of magnesium in the obtained metal magnesium rod is greater than 99.999%.

[0077] The implementation methods of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A high-purity magnesium preparation system, characterized in that: It comprises a heating assembly and a curing box (14), wherein the heating assembly comprises an internal crucible (3) and a heating device for heating the internal crucible (3), an intermediate cover plate (6) is provided above the internal crucible (3), and a side cover plate (12) is respectively connected through both sides of the intermediate cover plate (6); Two curing boxes (14) are arranged outside the heating assembly, a sleeve (1401) is connected through the curing box (14), and a side cover plate (12) is arranged on the open upper end of the sleeve (1401); The bottom surface of the middle cover plate (6) is provided with a vertical hole (601) which is connected to the internal crucible (3), and the bottom of the side cover plate (12) is provided with a discharge pipe (1202) which is connected to the sleeve (1401), and the vertical hole (601) is connected to the discharge pipe (1202).

2. A high-purity magnesium preparation system according to claim 1, characterized in that: The top surface of the intermediate cover plate (6) is concavely provided with a rotating groove coaxially connected to the vertical hole (601), and a regulating valve (7) is rotatably connected inside the rotating groove. The regulating valve (7) is provided with an L-shaped hole (701), and two openings of the L-shaped hole (701) are respectively located on the bottom surface and the circumferential side surface of the regulating valve (7), and the opening located on the bottom surface is coaxially connected to the vertical hole (601); The regulating valve (7) is rotated to adjust the openings on the circumferential side surfaces to be connected to the discharge pipes (1202) on the two side cover plates (12) respectively.

3. A high-purity magnesium preparation system according to claim 2, characterized in that: The two side cover plates (12) are symmetrically arranged on both sides of the middle cover plate (6); the side cover plates (12) and the middle cover plate (6) are fixedly connected via an intermediate bridge (13); a through hole is provided inside the middle bridge (13); and both sides of the through hole are respectively connected to the discharge pipe (1202) and the rotation groove of the middle cover plate (6).

4. A high-purity magnesium preparation system according to claim 3, characterized in that: A positioning plate (702) is convexly provided on the top surface of the regulating valve (7), and the positioning plate (702) is arranged opposite to the horizontal cavity in the L-shaped hole (701).

5. A high-purity magnesium preparation system according to claim 4, characterized in that: An arc-shaped pressure ring (603) is fixed on the top surface of the intermediate cover plate (6), and the bottom surface of the top plate of the arc-shaped pressure ring (603) abuts against the top surface of the regulating valve (7). The arc-shaped pressure ring (603) limits the rotation angle of the regulating valve (7). When the positioning plate (702) abuts against the end of the arc-shaped pressure plate (603), the horizontal hole of the L-shaped hole (701) is connected with the through hole inside the intermediate bridge (13).

6. A high-purity magnesium preparation system according to any one of claims 1 to 5, characterized in that: A material taking window is provided on the side wall of the curing box (14), and a material taking blocking plate (1402) is provided outside the material taking window.

7. A high-purity magnesium preparation system according to any one of claims 2 to 5, characterized in that: A crystallizer (15) is arranged inside the sleeve (1401) of one of the curing boxes (14), and a middle through hole (1501) is arranged on the crystallizer (15), and the middle through hole (1501) is coaxially connected with the discharge pipe (1202) of the corresponding side cover plate (12).

8. A high-purity magnesium preparation system according to claim 7, characterized in that: The upper part of the middle through hole (1501) is funnel-shaped.

9. A high-purity magnesium preparation system according to claim 7, characterized in that: A correspondingly arranged cutting assembly is provided below the crystallizer (15).

10. A high-purity magnesium preparation process, based on a high-purity magnesium preparation system according to claim 9, characterized in that: The following arrangements are included: S1, placing a metal magnesium ingot into an inner crucible (3), then covering the middle cover plate (6), and heating the inner crucible (3) by a heating device; S2, setting the heating temperature to 930° C.-960° C., adjusting the regulating valve (7) so that the L-shaped hole (701) is connected to the discharge pipe (1202) of the upper side cover plate (12) of the solidification box (14) without the crystallizer (15), and in this temperature range, the zinc contained in the metal magnesium ingot melts and evaporates to form gaseous metal zinc, which then flows into the solidification box (14), condenses and solidifies to form pure zinc; S3, after no new metal solidifies in the solidification box (14) in step S2, the temperature of the internal crucible (3) is heated to 1100°C-1300°C, and the regulating valve (7) is adjusted to connect the L-shaped hole (701) to the discharge pipe (1202) of the upper side cover plate (12) of the solidification box (14) provided with the crystallizer (15). In this temperature range, the magnesium contained in the metal magnesium ingot evaporates to form other metal magnesium, which then flows into the crystallizer (15) to cool and liquefy, and continues to cool and solidify in the process of flowing downward through the middle through hole (1501) to form a metal rod, which is then cut by the cutting assembly.

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