Dynamic sealing vacuum smelting device for magnesium metal

Abstract

The invention discloses a magnesium metal dynamic sealing vacuum smelting device, which relates to a smelting device and comprises a magnesium dynamic smelting system, a vacuum system and a collecting system. The smelting device drives the furnace tube to rotate through the motor and is matched with the roller bracket for supporting to realize uniform heating of raw materials; the vacuum system ensures dynamic sealing through a magnetofluid sealing device and a hoop, and a high-vacuum environment is maintained; ceramic material blocking rings at the two ends of the furnace tube prevent material leakage, and generated high-temperature magnesium steam is condensed and crystallized after passing through a collecting system. The rotating speed and heating process parameters are adjusted through the system controller, the reaction efficiency is optimized, traditional static smelting limitation is broken through, the magnesium metal purity and recovery rate are remarkably improved, energy consumption is reduced, and the method is suitable for large-scale continuous production.

Description

Technical Field

[0001] The invention relates to a smelting device, in particular to a magnesium metal dynamic sealing vacuum smelting device. Background Art

[0002] At present, the industrial field mainly uses the Pidgeon process, that is, the silicon thermal reduction method to smelt magnesium. This process uses dolomite as raw material. After crushing, calcining, and pelletizing, it undergoes a reduction reaction with ferrosilicon under high temperature and vacuum conditions to generate magnesium vapor and condense and recover it. However, this process has some defects. First, the process is implemented under static conditions, and the smelting equipment uses fixed furnace tubes or crucibles. The materials are in a static accumulation state, resulting in uneven heat transfer and limited reaction interface. Secondly, static smelting relies on external continuous high temperature to maintain the reaction. The efficiency of heat conduction to the central material through the furnace wall is low, and its energy consumption far exceeds the smelting energy consumption level of metals such as aluminum and copper. In addition, the static furnace tubes need to be disassembled regularly to clean the residue, and a single maintenance takes 4-6 hours. The equipment maintenance is complicated, and it is difficult to achieve continuous production, which restricts large-scale application.

[0003] To overcome the technical bottlenecks of traditional static smelting, the industry urgently needs to introduce dynamic reaction mechanisms and efficient vacuum sealing technologies to improve heat and mass transfer efficiency, reduce energy consumption, and ensure product purity. To this end, a magnesium metal dynamic sealing vacuum smelting device has been designed, which significantly improves smelting efficiency and significantly increases magnesium metal purity and recovery rate while reducing energy consumption. Summary of the Invention

[0004] The purpose of the present invention is to provide a dynamic sealed vacuum smelting device for magnesium metal, which uses a motor to drive the furnace tube to rotate so that the raw materials are evenly heated, and a high-temperature reduction reaction is carried out in a high vacuum environment maintained by a vacuum system to generate magnesium vapor, which is condensed and recovered by a collection system, and the cooled magnesium crystals are collected to achieve efficient production of high-purity magnesium metal.

[0005] To achieve the above object, the present invention provides the following technical solutions: A magnesium metal dynamic sealed vacuum smelting device, comprising a magnesium dynamic smelting system, a vacuum system, and a collection system, characterized in that the magnesium dynamic smelting system comprises a rotary drive support device, a furnace tube, a heating device, and a system controller; the furnace tube is placed in the heating device, one end of which is provided with a rotary drive support device, the rotary drive support device being connected to the furnace tube for rotational driving; a detachable flange is provided on each side of the furnace tube; the flange at the closed end of the furnace tube is connected to a blind flange and fixed by a left clamp; The collection system is located near the exhaust end of the furnace tube and includes a condenser. The condenser is connected to a delivery pipe, and the delivery pipe is connected to the cooling system. The condenser includes a left end flange and a right end flange on both sides. A magnetic fluid seal is used between the left end flange and the flange at the exhaust end of the furnace tube and is fixed by a clamp. The vacuum system includes a vacuum pump and a vacuum control system electrically connected thereto, the inlet end of the vacuum pump is connected to the outlet end of the bellows, the inlet end of the bellows is connected to the right end flange and fixed by a right clamp, and an air release valve is provided at the inlet end of the bellows.

[0006] A driven gear is installed on one side of the furnace tube, and the rotary drive support device includes a gear box, and the gear box is extended to be provided with a driving power output gear and a motor drive; the driving power output gear is meshed with the driven gear to form a kinematic pair, thereby realizing a rotary drive connection with the furnace tube.

[0007] The rotary drive support device includes a pair of roller brackets symmetrically installed on both sides of the furnace tube. The roller brackets are provided with multiple rollers, which are in the same horizontal direction and symmetrically distributed on both sides of the furnace tube axis.

[0008] The condenser is connected to the cooling system through a delivery pipeline. When the system is working, the temperature of the condenser is adjusted to meet the crystallization requirements by changing the speed of the cooling medium circulating inside. A collector is set at the crystallization outlet just below the condenser to collect the generated crystals.

[0009] The magnesium dynamic smelting system includes a system controller, and the rotation speed of the motor and the process parameters of the heating device are set by the system controller.

[0010] A ceramic retaining ring is provided on both sides of the furnace tube near the outer end, and the ceramic retaining ring is conical.

[0011] A plurality of ceramic rods are arranged between the ceramic blocking rings on the left and right sides of the furnace tube. The ceramic rods are aligned with the axial direction of the furnace tube and are attached to the inner surface of the furnace tube.

[0012] A pressure sensor is provided at the inlet of the bellows, and the pressure sensor is electrically connected to the vacuum control system for signal transmission, and the vacuum control system is electrically connected to the vacuum pump control.

[0013] The heating device includes an upper furnace body and a lower furnace body. A handle is provided on the front of the upper furnace body. The upper furnace body and one side of the lower furnace body are rotatably connected by a hinge. Gas struts are provided on both sides near the hinge. The upper and lower ends of the gas struts are respectively connected to the upper furnace body and the lower furnace body.

[0014] The upper furnace body and the lower furnace body include heating elements, a refractory cavity and a metal shell.

[0015] The magnesium metal dynamic sealed vacuum smelting device is based on the principle of "dynamic reaction + vacuum environment + directional condensation". Through the precise coordination of the magnesium dynamic smelting system, vacuum system and collection system, it realizes the continuous and efficient production of magnesium metal.

[0016] The vacuum system monitors the air pressure inside the furnace tube in real time through a pressure sensor. The vacuum pump continuously extracts air through the bellows, and cooperates with the dynamic sealing structure of the magnetic fluid sealing flange and the clamp to ensure that a high vacuum state is maintained in the furnace tube, reducing the partial pressure of magnesium vapor to promote the forward reaction.

[0017] Conical ceramic retaining rings at each end of the furnace tube prevent material leakage during rotation. Magnesium vapor, generated as it flows toward the right end of the tube, is condensed and adsorbed by a collection system, forming high-purity magnesium crystals. The system controller infinitely adjusts the motor speed, optimizing the material tumbling frequency and heat transfer efficiency, further improving smelting efficiency and magnesium metal purity.

[0018] The entire process achieves continuous and efficient production of magnesium metal through the coordinated operation of mechanical rotation, high-temperature heating, dynamic vacuum sealing and condensation recovery, breaking through the energy consumption and efficiency bottlenecks of traditional static smelting.

[0019] Compared with the prior art, the present invention has the following beneficial effects: Dynamic rotation improves smelting efficiency: The furnace tube is driven by a motor to rotate, so that the ore raw materials are evenly heated and fully contact the reaction interface, breaking through the limitations of traditional static smelting and significantly improving the reaction rate and raw material conversion rate.

[0020] High vacuum environment ensures purity and positive reaction: The vacuum system achieves dynamic sealing through magnetic fluid sealing flanges and clamps, continuously maintaining a high vacuum state in the furnace, reducing the partial pressure of magnesium vapor, promoting the positive reduction reaction, while avoiding magnesium metal oxidation and side reactions, and improving product purity.

[0021] The structural design optimizes production continuity and stability: the roller bracket supports the horizontal rotation of the furnace tube, the ceramic retaining ring prevents material leakage, the ceramic rod stirs the material evenly, and the detachable flange facilitates equipment maintenance. The collection system uses a condenser with a circulating cooling medium to cool the material and collect it through a collector, efficiently condensing and recovering magnesium vapor to achieve continuous production. The controller infinitely adjusts the motor speed, flexibly adapting to different raw materials and process requirements, further optimizing energy consumption and production efficiency.

[0022] Reduce energy consumption and costs: Through dynamic mixing and efficient heat transfer, energy loss is reduced, which is more energy-efficient than traditional static processes, helping to reduce magnesium metal smelting costs and promote its large-scale application in the field of lightweighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the front structure of a magnesium metal dynamic sealing vacuum smelting device of the present invention; Figure 2 This is a main cross-sectional view of the heating area of ​​a heating device of a magnesium metal dynamic sealing vacuum smelting device of the present invention; Figure 3This is a right side view of the main body of a heating device of a magnesium metal dynamic sealing vacuum smelting device of the present invention; Figure 4 This is a schematic structural diagram of a collection system for a magnesium metal dynamic sealing vacuum smelting device according to the present invention; In the figure: 1. Magnesium dynamic smelting system; 2. Vacuum system; 3. Collection system; 11. Rotary drive support device; 12. Furnace tube; 13. Heating device; 14. System controller; 111. Motor; 112. Gearbox; 113. Power output gear; 114. Roller bracket; 115. Roller; 121. Flange; 122. Driven gear; 123. Ceramic retaining ring; 124. Ceramic rod; 131. Upper furnace body; 132. Lower furnace body; 133. Hinge; 134. Handle; 135. Heating element; 136. Refractory cavity; 137. Metal shell; 138. Gas strut; 21. Pressure sensor; 22. Vacuum pump; 23. Bellows; 24. Vacuum control system; 25. Left clamp; 26. Right clamp; 27. Blind flange; 28. Air release valve; 31. Cooling system; 32. Condenser; 33. Collector; 34. Delivery pipeline; 35. Left end flange; 36. Right end flange; 37. Clamp. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] The technical solutions in the embodiments of the present invention will be fully described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] like Figure 1-4 As shown, a magnesium metal dynamic sealed vacuum smelting device includes a magnesium dynamic smelting system 1, a vacuum system 2 and a collection system 3, characterized in that the magnesium dynamic smelting system 1 includes a rotary drive support device 11, a furnace tube 12, a heating device 13, and a system controller 14. The furnace tube 12 is placed in the heating device 13, and a rotary drive support device 11 is provided at one end thereof. The rotary drive support device 11 is connected to the furnace tube 12 for rotational driving. A detachable flange 121 is provided on each side of the furnace tube 12. The flange 121 at the closed end of the furnace tube 12 is connected to a blind flange 27 and fixed by a left clamp 25. The collection system 3 is located near the exhaust end of the furnace tube 12 and includes a condenser 32. The condenser 32 is connected to a delivery pipe 34, and the delivery pipe 34 is connected to the cooling system 31. The condenser 32 includes a left end flange 35 and a right end flange 36 on both sides. The left end flange 35 and the flange 121 at the exhaust end of the furnace tube 12 are sealed with magnetic fluid and fixed by a clamp 37. The vacuum system 2 includes a vacuum pump 22 and a vacuum control system 24 electrically connected thereto. The inlet end of the vacuum pump 22 is connected to the outlet end of the bellows 23. The inlet end of the bellows 23 is connected to the right end flange 36 and fixed by a right clamp 26. An air release valve 28 is provided at the inlet end of the bellows 23.

[0027] A driven gear 122 is installed on one side of the furnace tube 12, and the rotary drive support device 11 includes a gear box 112, and the gear box 112 is extended to be provided with a driving power output gear 113 and is provided with a motor 111 to drive; the driving power output gear 113 is engaged with the driven gear 122 to form a kinematic pair, thereby realizing a rotational drive connection with the furnace tube 12.

[0028] The rotary drive support device 11 includes a pair of roller brackets 114, which are symmetrically installed on both sides of the furnace tube 12. The roller brackets 114 are provided with multiple rollers 115, which are in the same horizontal direction and symmetrically distributed on both sides of the axis of the furnace tube 12.

[0029] The condenser 32 is connected to the cooling system 31 through a delivery pipe 34. When the system is working, the temperature of the condenser 32 is adjusted to meet the crystallization requirements by changing the speed of the cooling medium circulating inside. A collector 33 is set at the crystallization outlet just below the condenser 32 to collect the generated crystals.

[0030] The magnesium dynamic smelting system 1 includes a system controller 14 , and the rotation speed of the motor 111 and the process parameters of the heating device 13 are set by the system controller 14 .

[0031] Ceramic retaining rings 124 are respectively provided on the left and right sides of the furnace tube 12 near the outer end, and the ceramic retaining rings 124 are conical.

[0032] A plurality of ceramic rods 125 are provided between the ceramic retaining rings 124 on the left and right sides of the furnace tube 12 . The ceramic rods 125 are aligned axially with the furnace tube 12 and are attached to the inner surface of the furnace tube 12 .

[0033] A pressure sensor 21 is provided at the inlet of the bellows 23 . The pressure sensor 21 is electrically connected to a vacuum control system 24 for signal transmission. The vacuum control system 24 is electrically connected to a vacuum pump 22 for control.

[0034] The heating device 13 includes an upper furnace body 131 and a lower furnace body 132. A handle 134 is provided on the front of the upper furnace body 131. The upper furnace body 131 and the lower furnace body 132 are rotatably connected on one side by a hinge 133. Gas struts 138 are provided on both sides near the hinge 133. The upper and lower ends of the gas struts 138 are respectively connected to the upper furnace body 131 and the lower furnace body 132.

[0035] The upper furnace body 131 and the lower furnace body 132 include a heating element 135 , a refractory cavity 136 and a metal shell 137 .

[0036] In this embodiment, by sealing and connecting the magnesium dynamic smelting system 1, the vacuum system 2 and the collection system 3, a completely sealed system can be formed to isolate the outside air; the furnace tube 12 rotates at a constant rate in the horizontal direction under the action of the rotary drive support device 11, and the material in the furnace tube is uniformly heated by the heating device 13 to provide the temperature required for the entire high-temperature reduction reaction; the vacuum system 2 continuously evacuates the closed reaction space to maintain an internal high vacuum environment; under the action of the collection system 3, the magnesium vapor generated by the reaction encounters the condenser 32 for condensation and crystallization, and the cooling system 31 continuously removes the heat absorbed by the condenser through the internal circulating cooling medium to ensure the continuity and stability of the condensation process, and the collector 33 recovers the magnesium crystals; through the cooperation between the three systems, efficient smelting of high-purity magnesium metal is achieved.

[0037] Specifically, a driven gear 122 is installed on one side of the furnace tube 12, and the rotary drive support device includes a gear box 112, and the gear box 112 is extended to set a driving power output gear 113 and is driven by a motor 111; the driving power output gear 113 is engaged with the driven gear 122 to form a kinematic pair, thereby realizing a rotational drive connection with the furnace tube 12.

[0038] In this embodiment, when the drive motor 111 is started, under the action of the gear box 112, the driving power output gear 113 outputs a specific speed. By installing a driven gear 122 on one side of the furnace tube 12 and meshing it with the driving power output gear 113 to form a moving pair, power transmission is achieved, ensuring that the furnace tube 12 can operate stably at the target speed, thereby improving the uniformity of material heating and promoting the high-temperature reduction reaction.

[0039] Specifically, the rotary drive support device 11 includes a roller bracket 114, which is a pair and is symmetrically installed on both sides of the heating device 13 by bolts. The roller bracket 114 is provided with multiple rollers 115, and the rollers 115 are in the same horizontal direction and symmetrically distributed on both sides of the axis of the furnace tube 12.

[0040] In this embodiment, roller brackets 114 are fixedly installed on both sides of the heating device, and multiple rollers 115 are provided on the roller brackets 114 to ensure that the furnace tube 12 is always in a horizontal state during the rotation process, thereby preventing the furnace tube 12 from shaking due to the gap between the furnace tube 12 and the rollers 115 during the rotation process, and preventing the furnace tube 12 from tilting, causing the material to move to the lower side and accumulate at the outlet, causing the reaction to be unable to proceed.

[0041] Specifically, the condenser 32 is connected to the cooling system 31 through a delivery pipe 34. When the system is working, the temperature of the condenser 32 is adjusted to meet the crystallization requirements by changing the speed of the cooling medium circulating inside. The collector 33 is located directly below the condenser 32 and is used to collect the generated crystals.

[0042] In this embodiment, a condenser 32 is provided to condense the high-temperature magnesium vapor. Under the action of the cooling system 31, the cooling medium continuously flows through the condenser 31 through the conveying pipe 34, taking away the heat released by the magnesium vapor, ensuring the continuation of the condensation process. The magnesium crystals produced by the condensation are collected by the collector 33. After the reaction is completed, the collector 33 is opened for recovery.

[0043] Specifically, the magnesium dynamic smelting system 1 includes a system controller 14 , and the rotation speed of the motor 111 and the process parameters of the heating device 13 are set by the system controller 14 .

[0044] In this embodiment, the system controller 14 is set to adjust the rotation speed of the motor 111 and the process parameters of the heating device 13, so that the process parameters of the smelting process can be changed to adapt to different needs, realizing multi-scenario application of the magnesium dynamic smelting system.

[0045] Specifically, ceramic retaining rings 123 are respectively provided on the left and right sides of the furnace tube 12 near the outer end, and the ceramic retaining rings 123 are conical.

[0046] In this embodiment, ceramic retaining rings are set at both ends of the furnace tube 12 to further limit the movement space of the material, ensuring that the reaction area is located in the core heating area of ​​the heating device 13, avoiding uneven heating due to the dispersion of the material, insufficient reaction, and reduced efficiency of the high-temperature reduction reaction.

[0047] Specifically, a plurality of ceramic rods 124 are provided between the ceramic retaining rings 123 on the left and right sides of the furnace tube 12 . The ceramic rods 124 are axially aligned with the furnace tube 12 and are attached to the inner surface of the furnace tube 12 .

[0048] In this embodiment, by setting a ceramic rod 124 in the axial direction of the inner surface of the furnace tube 12, the material is fully stirred while being heated, thereby improving the mixing uniformity and avoiding incomplete reaction due to uneven mixing of the components inside the material, thereby reducing the efficiency of the high-temperature reduction reaction.

[0049] Specifically, the pressure sensor 21 and the air release valve 28 are both installed near the inlet of the bellows 23 , the vacuum control system 24 is electrically connected to the pressure sensor 21 for signal transmission, and the vacuum control system 24 is electrically connected to the vacuum pump 22 for control.

[0050] In this embodiment, the connection and isolation between the smelting system and the atmospheric environment are achieved by opening and closing the air release valve 28, which facilitates the introduction of atmosphere into the smelting system after the smelting process to achieve the balance of internal and external air pressures, thereby avoiding the inconvenience of disassembling the smelting system due to excessive pressure difference. In addition, the pressure sensor 21 can monitor the internal pressure of the smelting system in real time, and the vacuum control system 24 receives the pressure signal transmitted by the pressure sensor 21, and outputs a control signal after comparing it with the target value, thereby dynamically adjusting the operating state of the vacuum pump 22 to ensure The reaction process is always carried out at the set pressure.

[0051] Specifically, the heating device 13 includes an upper furnace body 131 and a lower furnace body 132 , which are movably connected via a hinge 133 and gas struts 138 on both sides. A handle 134 is provided on the front of the upper furnace body 131 .

[0052] In this embodiment, by arranging an upper furnace body 131 and a lower furnace body 132 inside the heating device 13, the furnace tube 12 is heated symmetrically in the vertical direction, so that the internal material is heated more evenly. The upper and lower furnace bodies are movably connected by a hinge 133 and gas struts 138 on both sides, so that the upper furnace body 131 can rotate around the axis of the hinge 133. The tension generated by the gas struts 138 is used to limit the maximum opening angle of the upper furnace body 131 to ensure that it stays stably in the extreme position in the naturally open state. In addition, a handle 134 is provided on the front of the upper furnace body 131, so that the upper furnace body 131 can be rotated around the axis by pulling the handle 134, thereby realizing the opening and closing of the heating device 13.

[0053] Specifically, the upper furnace body 131 and the lower furnace body 132 include a heating element 135 , a refractory cavity 136 and a metal shell 137 .

[0054] In this embodiment, the furnace body 131 and the lower furnace body 132 are both composed of a heating element 135, a refractory cavity 136 and a metal shell 137. The heat generated by the heating element 135 after being energized is used to heat the material to ensure that the reaction temperature meets the requirements. The good thermal insulation performance of the refractory cavity 136 is used to reduce the transfer of heat to the environment, reduce the temperature fluctuation in the core heating area, and make the reaction process more stable. The metal shell 137 is used to protect the furnace cavity to avoid damage to the heating device 13 due to external force.

[0055] To use this device, follow the steps below: 13. The cam 132 is engaged with the gear 134 and the gear 136. The cam 133 is engaged with the gear 137 and the gear 138. The cam 133 is engaged with the gear 139 and the gear 139. The cam 133 is engaged with the gear 139 and the gear 138. The gear 113 is correctly engaged to realize that the furnace tube 12 rotates continuously and stably in the subsequent reaction process, and the material is subsequently fed into the middle heating area of ​​the furnace tube 12, and the handle 134 is pulled downwards to close the upper furnace body 131 counterclockwise around the hinge 133 until it is fully fitted with the lower furnace body 123, and the heating device 13 is closed. The flange 121 on the left side of the furnace tube 12 is connected to the blind flange 27 by the clamp 25 to ensure that the left end of the furnace tube is in a sealed state, and then the flange 121 on the right side of the furnace tube 12 is sealed with the left end flange 35 of the collecting system 3 by the clamp 37, and the right end flange 36 of the collecting system 3 is sealed with the bellows 23 by the clamp 26. The other end of the bellows 23 is connected to the vacuum pump 22 to achieve the complete sealing of the whole system, and avoid affecting the reaction due to the entry of external gas; Step 2: The speed of the motor 111 is adjusted through the system controller 14. The motor 111 drives the power output gear 113 through the gear box 112 to engage with the driven gear 122 of the furnace tube 12, driving the furnace tube 12 to rotate at 4~6r / min. The vent valve 28 is closed and the target pressure is set to 10Pa through the vacuum control system 24. Then, the vacuum pump 22 is started through the vacuum control system 24 to start evacuating the system. When the pressure in the system reaches 10Pa and stabilizes, the process parameters of the heating device (13) are set through the system controller 14. According to actual needs, the temperature in the furnace is controlled at 1000~1200℃, and the holding time is set to 1~4h. During the smelting process, the material is constantly turned in the furnace tube 12 and fully mixed under the stirring action of the ceramic rod 124. The ceramic retaining ring 123 prevents the material from moving to the sides of the furnace tube 12 away from the middle heating zone, causing the reaction efficiency to decrease. The system pressure is collected in real time by the pressure sensor 21 and output to the vacuum control system 24. After comparison and calculation with the target value, a control signal is output, thereby dynamically adjusting the operating state of the vacuum pump 22; Step 3. After the temperature reaches the target temperature, the metal vapor smelted by high-temperature reduction will be sucked toward the condenser 32 by the vacuum pump 22 and condensed. The operating parameters of the cooling system 31 are adjusted according to actual needs to achieve the condensation of the magnesium vapor. The condensed magnesium vapor is collected by the collector 33. After the reaction is completed, the collector 33 is cooled and disassembled to recover the magnesium crystals, thereby achieving efficient, low-consumption, and continuous production of high-purity magnesium metal.

[0056] After testing, it was found that when the reaction temperature was 1200°C and the holding time was 4 hours, the magnesium metal dynamic sealing vacuum smelting device could increase the magnesium conversion rate to more than 90%.

Claims

1. A magnesium metal dynamic sealed vacuum smelting device, comprising a magnesium dynamic smelting system (1), a vacuum system (2) and a collection system (3), characterized in that: The magnesium dynamic smelting system (1) comprises a rotary drive support device (11), a furnace tube (12), a heating device (13), and a system controller (14); the furnace tube (12) is placed in the heating device (13); a rotary drive support device (11) is provided at one end of the furnace tube (12); the rotary drive support device (11) is connected to the furnace tube (12) for rotational driving; a detachable flange (121) is provided on each side of the furnace tube (12); the flange (121) at the closed end of the furnace tube (12) is connected to a blind flange (27) and fixed by a left clamp (25); The collecting system (3) is located near the exhaust end of the furnace tube (12) and includes a condenser (32). The condenser (32) is connected to a delivery pipe (34), and the delivery pipe (34) is connected to the cooling system (31). The condenser (32) includes a left end flange (35) and a right end flange (36) on both sides. A magnetic fluid seal is used between the left end flange (35) and the flange (121) located at the exhaust end of the furnace tube (12), and the seal is fixed by a clamp (37). The vacuum system (2) includes a vacuum pump (22) and a vacuum control system (24) electrically connected thereto; the inlet end of the vacuum pump (22) is connected to the outlet end of the bellows (23); the inlet end of the bellows (23) is connected to the right end flange (36) and fixed by a right clamp (26); and a vent valve (28) is provided at the inlet end of the bellows (23).

2. The magnesium metal dynamic sealing vacuum smelting device according to claim 1, characterized in that: A driven gear (122) is installed on one side of the furnace tube (12), and the rotary drive support device (11) includes a gear box (112). The gear box (112) is extended to be provided with a driving power output gear (113) and is provided with a motor (111) for driving; the driving power output gear (113) is meshed with the driven gear (122) to form a kinematic pair, thereby realizing a rotational drive connection with the furnace tube (12).

3. The magnesium metal dynamic sealing vacuum smelting device according to claim 1, characterized in that: The rotary drive support device (11) comprises a pair of roller brackets (114) symmetrically mounted on both sides of the furnace tube (12); the roller brackets (114) are provided with a plurality of rollers (115); the rollers (115) are in the same horizontal direction and symmetrically distributed on both sides of the axis of the furnace tube (12).

4. The magnesium metal dynamic sealing vacuum smelting device according to claim 1, characterized in that: The condenser (32) is connected to the cooling system (31) via a delivery pipe (34). When the system is working, the temperature of the condenser (32) is adjusted to meet the crystallization requirements by changing the speed of the cooling medium circulating inside. A collector (33) is provided at the crystallization outlet directly below the condenser (32) to collect the generated crystals.

5. The magnesium metal dynamic sealing vacuum smelting device according to claim 1, characterized in that: The magnesium dynamic smelting system (1) comprises a system controller (14), and the rotation speed of the motor (111) and the process parameters of the heating device (13) are set by the system controller (14).

6. The magnesium metal dynamic sealing vacuum smelting device according to claim 1, characterized in that: A ceramic material retaining ring (124) is provided on both sides of the furnace tube (12) near the outer end, and the ceramic material retaining ring (124) is conical.

7. The magnesium metal dynamic sealing vacuum smelting device according to claim 1, characterized in that: A plurality of ceramic rods (125) are provided between the ceramic retaining rings (124) on the left and right sides of the furnace tube (12). The ceramic rods (125) are axially aligned with the furnace tube (12) and are attached to the inner surface of the furnace tube (12).

8. The magnesium metal dynamic sealing vacuum smelting device according to claim 1, characterized in that: A pressure sensor (21) is provided at the inlet of the bellows (23), the pressure sensor (21) is electrically connected to the vacuum control system (24) for signal transmission, and the vacuum control system (24) is electrically connected to the vacuum pump (22) for control.

9. The magnesium metal dynamic sealing vacuum smelting device according to claim 1, characterized in that: The heating device (13) includes an upper furnace body (131) and a lower furnace body (132). A handle (134) is provided on the front of the upper furnace body (131). The upper furnace body (131) is rotatably connected to one side of the lower furnace body (132) through a hinge (133). Gas support rods (138) are provided on both sides near the hinge (133). The upper and lower ends of the gas support rods (138) are respectively connected to the upper furnace body (131) and the lower furnace body (132).

10. The magnesium metal dynamic sealing vacuum smelting device according to claim 9, characterized in that: The upper furnace body (131) and the lower furnace body (132) include a heating element (135), a refractory cavity (136) and a metal shell (137).

Images