Spiral stirring blade, stirring device and magnesium alloy melt refining device and method

Abstract

The invention discloses a spiral stirring blade, a stirring device and a magnesium alloy melt refining device and method. The spiral stirring blade is of a single-spiral structure, the screw pitch, the width and the diameter of the spiral stirring blade are equal, the width is 1 / 4 of the screw pitch, and the spiral angle of the spiral stirring blade is 110 degrees. According to the magnesium alloy melt refining method provided by the embodiment of the invention, the refining time is shortened by more than 30% compared with that of a traditional refiner, the refining effect is good, and the inclusion content reaches the first level of aviation standard.

Description

Technical Field

[0001] The present invention particularly relates to a spiral stirring blade, a stirring device, a magnesium alloy melt refining device and a method, and belongs to the technical field of casting. Background Art

[0002] Since magnesium alloys are particularly susceptible to oxidation, the melt will be entrained with magnesium oxide and other alloying element oxides during the melting process to form inclusions. If these inclusions enter the casting along with the melt, it will cause oxidation inclusion defects in the casting. Once the inclusions exceed the standard requirements, it will affect the mechanical properties, corrosion resistance and fatigue properties of the casting, causing premature failure of the casting and posing a threat to the safety of product use. Therefore, before the melt enters the casting, the oxidation inclusions must be removed to meet the corresponding standards.

[0003] Magnesium alloy refining is to use the stirring action of the refiner to allow the refining agent and inclusions in the melt to fully contact, so that the flux quickly absorbs the inclusions, and then floats up or sinks, to achieve the purpose of purifying the melt.

[0004] At present, the main methods for treating magnesium alloy melts include the "water pump" method, the manual stirring method, and the simulated manual mechanical stirring method.

[0005] The "pumping" method is to drive the impeller rotor in the guide tube through a variable frequency motor to transport the melt from the bottom of the crucible to the liquid surface through the window on the upper part of the guide tube, and continuously sprinkle the refining agent to the window to make it fully contact with the melt. Through the adsorption effect of the refining agent on inclusions, the refining agent absorbs the inclusions in the melt and then floats or sinks (if the density of the refining agent is less than the density of the magnesium alloy melt, it floats; if the density of the refining agent is greater than the density of the magnesium alloy melt, it sinks). This operation lasts for 10 to 20 minutes to achieve the refining purpose. The principle diagram is shown in Figure 1 Manual stirring method: A person holds a metal spoon and stirs the melt manually, causing the melt at the bottom of the crucible to flip upward and rise to the liquid surface. Refining agent is sprinkled on the liquid surface to make it fully contact with the melt. The refining agent adsorbs inclusions, causing the inclusions to float or sink with the refining agent (if the refining agent density is less than the density of the magnesium alloy melt, it will float; if the refining agent density is greater than the density of the magnesium alloy melt, it will sink), thereby achieving the refining purpose. This operation lasts for 10 to 20 minutes. See the schematic diagram for details. Figure 2 . Because human strength will be affected in a high temperature environment, the consistency and stability of the manual stirring refining method are not good, and the effect is therefore different. The simulated manual mechanical stirring method is essentially the same as manual stirring, but the hand is replaced by a moving machine, which only eliminates the human influence factor, and other disadvantages still exist. Its principle is as follows Figure 3 shown.

[0006] The above three methods (essentially two methods) all have their own shortcomings. The specific explanations are as follows: "Water pump" method: First, it is easy to pump the slag at the bottom of the crucible to the upper part of the melt, causing secondary contamination to the melt; second, the "water pump" cannot cover the entire crucible area, and part of the melt cannot fully contact the flux, resulting in differences in melt quality. Manual stirring method and simulated manual mechanical stirring method: There is an angle between the metal stirring spoon and the crucible, and this stirring method also has a dead angle, and part of the melt cannot fully contact the flux, resulting in differences in melt quality. Summary of the invention

[0007] The main purpose of the present invention is to provide a spiral stirring blade, a stirring device, a magnesium alloy melt refining device and a method, so as to overcome the deficiencies in the prior art.

[0008] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes: A first aspect of an embodiment of the present invention provides a spiral stirring blade, which is a single spiral structure, and the pitch, width and diameter of the spiral stirring blade are all equal. Moreover, the ratio of the pitch, width and diameter of the spiral stirring blade is (50~80):(13~16):(14~16), and the helix angle of the spiral stirring blade is 100°~110°.

[0009] The second aspect of an embodiment of the present invention provides a stirring device for stirring a melt, which is used to stir the melt in a refining container, and comprises: a driving mechanism, a transmission structure and at least one stirring blade, wherein the driving mechanism is connected to the stirring blade via the transmission structure, and the stirring blade can rotate around its own axis and revolve around the axis of the output shaft of the driving mechanism under the drive of the driving mechanism, and the stirring blade is arranged in the refining container, wherein the stirring blade is the spiral stirring blade.

[0010] A third aspect of an embodiment of the present invention provides a magnesium alloy melt refining device, comprising: A refining container, wherein the refining container has a receiving cavity for containing the magnesium alloy melt; The stirring device for stirring the melt, wherein the stirring blade is arranged in the receiving chamber and is used to stir the magnesium alloy melt in the receiving chamber; The refining agent supply mechanism is used to provide the refining agent into the receiving chamber.

[0011] A fourth aspect of an embodiment of the present invention provides a method for refining a magnesium alloy melt, comprising: The magnesium alloy melt refining device injects the magnesium alloy melt into the receiving chamber; The stirring blade is caused to rotate about its own axis and simultaneously revolve around the axis of the output shaft of the driving mechanism, so as to move the magnesium alloy melt located at the bottom of the receiving chamber upward; And, a refining agent is added to the surface of the magnesium alloy melt in the containing chamber, the refining agent contacts and mixes with the magnesium alloy melt, and impurities in the magnesium alloy melt are adsorbed by the refining agent and float up or sink with the refining agent.

[0012] Compared with the prior art, the advantages of the present invention include: The magnesium alloy melt refining device provided in the embodiment of the present invention has an eccentric structure in which the stirring blades are capable of self-rotation and revolution along the center. The stirring blades can bring the refining agent into the melt so that the refining agent is in full contact with the melt, thereby achieving a good refining effect. At the same time, the slag at the bottom of the container will not be stirred up, thereby avoiding secondary contamination of the melt. The magnesium alloy melt refining method provided by the embodiment of the present invention shortens the refining time by more than 30% compared with the traditional refiner, and has a good refining effect, and the amount of inclusions reaches the first level of aviation standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the principle of a "water pump" refining in the prior art; Figure 2 It is a schematic diagram of the principle of "manual stirring and refining" in the prior art; Figure 3 It is a schematic diagram of the principle of simulating manual stirring and refining in the prior art; Figure 4 It is a structural schematic diagram of a magnesium alloy melt refining device provided in a typical implementation case of the present invention; Figure 5 It is a structural schematic diagram of a magnesium alloy melt refining device provided in a typical implementation case of the present invention. DETAILED DESCRIPTION

[0014] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The technical solution, its implementation process and principle will be further explained as follows.

[0015] A first aspect of an embodiment of the present invention provides a spiral stirring blade, which is a single spiral structure, and the pitch, width and diameter of the spiral stirring blade are all equal. Moreover, the ratio of the pitch, width and diameter of the spiral stirring blade is (50~80):(13~16):(14~16), and the helix angle of the spiral stirring blade is 100°~110°.

[0016] Furthermore, the width of the spiral stirring blade is 1 / 4 of the pitch.

[0017] Furthermore, the pitch of the spiral stirring blade is 500 mm to 800 mm, preferably 550 mm to 700 mm.

[0018] Furthermore, the width of the spiral stirring blade is 130 mm to 160 mm.

[0019] Furthermore, the diameter of the spiral stirring blade is 140 mm to 160 mm.

[0020] With such a design, when the alloy liquid is stirred by a stirring device having the spiral stirring blade, the rising speed of the alloy liquid is relatively gentle, and the melt will not produce violent vortexes and shakes, thereby improving the refining effect.

[0021] The second aspect of an embodiment of the present invention provides a stirring device for stirring a melt, which is used to stir the melt in a refining container, and comprises: a driving mechanism, a transmission structure and at least one stirring blade, wherein the driving mechanism is connected to the stirring blade via the transmission structure, and the stirring blade can rotate around its own axis and revolve around the axis of the output shaft of the driving mechanism under the drive of the driving mechanism, and the stirring blade is arranged in the refining container, wherein the stirring blade is the spiral stirring blade.

[0022] Furthermore, the transmission structure includes a connecting plate, at least one connecting shaft, a driving gear and at least one driven gear, the output shaft of the driving mechanism is fixedly connected to the connecting plate, the connecting shaft is fixedly connected to the stirring blade, the connecting shaft is rotatably connected to the connecting plate via a bearing, the driving gear is fixed on the output shaft of the driving mechanism, the driven gear is fixed on the connecting shaft, the driving gear is meshed with the driven gear, and the connecting plate, the connecting shaft and the stirring blade as a whole can rotate around the axis of the output shaft of the driving mechanism under the drive of the driving mechanism.

[0023] Furthermore, the connecting shaft, the output shaft of the driving mechanism and the axes of the stirring blades are parallel.

[0024] Furthermore, the distance between the axis of the output shaft of the driving mechanism and the axis of the stirring blade is 1 / 2 of the radius of the refining container.

[0025] Furthermore, the connecting shaft and the stirring blade are coaxially arranged.

[0026] In a more specific embodiment, the stirring device for stirring the melt includes: two stirring blades, the two stirring blades are arranged in mirror symmetry, and the two stirring blades can be driven by the same driving mechanism, and the two stirring blades have the same rotation direction.

[0027] A third aspect of an embodiment of the present invention provides a magnesium alloy melt refining device, comprising: A refining container, wherein the refining container has a receiving cavity for containing the magnesium alloy melt; The stirring device for stirring the melt, wherein the stirring blade is arranged in the receiving chamber and is used to stir the magnesium alloy melt in the receiving chamber; The refining agent supply mechanism is used to provide the refining agent into the receiving chamber.

[0028] Furthermore, the distance between the bottom of the stirring blade and the bottom of the receiving chamber is greater than 200 mm, preferably 200 mm-300 mm.

[0029] Furthermore, a refining agent injection structure is also provided on the connecting plate, and the refining agent injection structure matches the refining agent supply mechanism, and the refining agent provided by the refining agent supply mechanism is injected into the receiving cavity from the refining agent injection structure.

[0030] Furthermore, the vertical distance between the axis of the refining agent injection structure and the axis of the output shaft of the driving mechanism is equal to the vertical distance between the axis of the output shaft of the driving mechanism and the axis of the stirring blade.

[0031] Furthermore, the refining agent injection structure includes a transition hopper.

[0032] Furthermore, the magnesium alloy melt refining device also includes a bracket, and the driving mechanism and the refining agent supply mechanism are both installed on the bracket.

[0033] A fourth aspect of an embodiment of the present invention provides a method for refining a magnesium alloy melt, comprising: The magnesium alloy melt refining device injects the magnesium alloy melt into the receiving chamber; The stirring blade is caused to rotate about its own axis and simultaneously revolve around the axis of the output shaft of the driving mechanism, so as to move the magnesium alloy melt located at the bottom of the receiving chamber upward; And, a refining agent is added to the surface of the magnesium alloy melt in the containing chamber, the refining agent contacts and mixes with the magnesium alloy melt, and impurities in the magnesium alloy melt are adsorbed by the refining agent and float up or sink with the refining agent.

[0034] Furthermore, the rotation direction of the stirring blade is the same as its own spiral direction.

[0035] Furthermore, the speed of the stirring blade's rotation is greater than its revolution speed.

[0036] Furthermore, the ratio of the speed of rotation of the stirring blade to the speed of revolution is (7-8): (4-6).

[0037] Furthermore, the stirring blade has a rotation speed of 350 r / min to 400 r / min and a revolution speed of 200 r / min to 300 r / min.

[0038] Furthermore, the refining agent injection port is a retractable structure, and is kept at a distance of about 100 mm from the liquid level of the magnesium alloy melt in the receiving chamber.

[0039] The technical solution, its implementation process and principles, etc. will be further explained below in conjunction with the accompanying drawings and specific implementation cases. Unless otherwise specified, the motors, gears, brackets, hoppers, feeders, etc. in the embodiments of the present invention are all known in the art, and their specific structures are not limited or described here.

[0040] In a typical implementation case, please refer to Figure 4 A magnesium alloy melt refining device includes: a refining container (not shown in the figure), a bracket 100, a stirring device 200 for stirring the melt, and a refining agent supply mechanism 300. The bracket 100 is installed on the refining container, the stirring device 200 and the refining agent supply mechanism 300 are installed on the bracket 100, the refining agent supply mechanism 300 is used to provide refining agent into the refining container, and the stirring device 200 is used to stir the magnesium alloy melt in the refining container.

[0041] Specifically, the bracket 100 is not only used to assemble other functional mechanisms, but also can serve as a cover of the refining container. More specifically, a lifting ring 110 can be provided on the bracket 100 so that the bracket 100 together with other functional mechanisms installed on the bracket 100 can be lifted by a lift to realize the assembly and transfer of the bracket 100.

[0042] Specifically, the stirring device 200 includes a driving mechanism 210, a transmission structure 220 and a stirring blade 230. The driving mechanism 210 is installed on the bracket 100. The transmission structure 220 includes a connecting plate 221, a connecting shaft 222, a coupling 223, a driving gear 224, a driven gear 225 and a bearing 226. The output shaft of the driving mechanism 210 is fixedly connected to the connecting plate 221, the connecting shaft 222 is fixedly connected to the stirring blade 230, the connecting shaft 222 is rotatably connected to the connecting plate 221 via a bearing 226, and the coupling 223 is connected to the connecting plate 221. 3. The driving gear 224 is fixed on the output shaft of the driving mechanism 210, the coupling 223 is located between the driving gear 224 and the connecting plate 221, the driven gear 225 is fixedly arranged on the connecting shaft 222, the driving gear 224 is meshed with the driven gear 225, the connecting plate 221 and the connecting shaft 222, and the stirring blade 230 as a whole can rotate around the axis of the output shaft of the driving mechanism 210 under the drive of the driving mechanism 210, and at the same time, the stirring blade 230 also rotates around the axis of the connecting shaft 222 together with the connecting shaft 222.

[0043] Specifically, the stirring blade 230 is coaxially arranged with the connecting shaft 222, the connecting shaft 222 is parallel to the output shaft of the driving mechanism 210, the vertical distance between the central axis of the connecting shaft 222 and the central axis of the output shaft of the driving mechanism 210 is the orbital radius of the stirring blade 230, and the orbital radius of the stirring blade 230 is 1 / 2 of the radius of the refining container.

[0044] Specifically, the stirring blade 230 is a spiral stirring blade with a single spiral structure, and the pitch, width and diameter of the spiral stirring blade are all equal. The pitch of the spiral stirring blade is 500mm~800mm, preferably 550mm~700mm, the width of the spiral stirring blade is 130m~160mm, the diameter of the spiral stirring blade is 140mm~160m, and the helix angle of the spiral stirring blade is 100°~110°.

[0045] Specifically, the working rotation direction of the stirring blade in the embodiment of the present invention complies with the right-hand spiral rule (that is, the four fingers of the right hand are placed along the spiral direction, and the direction of the thumb is the connection direction with the motor). The rotation direction of the stirring blade when working is consistent with the spiral direction of the stirring blade. The melt moves from the bottom to the top through the rotation of the stirring blade, and the refining agent is sprinkled onto the liquid surface. The stirring blade can bring the refining agent into the melt, so that the refining agent can fully contact the melt.

[0046] In order to make the whole melt fully contact with the refining agent, the melt revolves along the center line of the refiner while rotating, so that the melt will cover the whole melt, thereby ensuring the refining effect of the whole melt. Different spiral arm sizes and distances from the spiral arm to the center line of the refiner are designed according to the size of the crucible.

[0047] Specifically, the driving mechanism 210 can be a variable frequency high temperature resistant motor, etc., which replaces the traditional motor and reducer structure. The output speed of the motor is adjusted by changing the frequency, making the device compact, with low failure rate and improved reliability.

[0048] Specifically, the refining agent supply mechanism 300 includes an intermittent screw feeder 310 and a flux hopper 320. The flux hopper 320 is fixed on the bracket 100. The intermittent screw feeder 310 is connected to the flux hopper 320. The screw feeder is used to quantitatively feed the material to ensure that the added refining agent is accurately quantitatively fed. Specifically, the feeding time of the screw feeder can be calculated by the rotation speed and time of the stirring blade to ensure that the screw feeder accurately enters the hopper to ensure that the input refining agent has sufficient time to mix with the melt and ensure the slag removal effect. It should be noted that the intermittent screw feeder 310 and the flux hopper 320 can be structures known in the art, which can be purchased commercially, and their specific structures and product models are not limited here.

[0049] Specifically, in order to cooperate with the refining agent supply mechanism 300 to realize the addition of refining agent, a transition hopper 227 is also provided on the connecting plate 221, and the discharge port of the transition hopper 227 is located in the refining container. The refining agent provided by the refining agent supply mechanism 300 can be introduced into the refining container through the transition hopper 227. More specifically, the discharge port of the transition hopper 227 is a retractable structure, and the distance from the liquid surface in the refining container is maintained at about 100 mm. It should be noted that the transition hopper 227 and the stirring blades are respectively arranged on both sides of the connecting plate. In order to maintain the stability of the connecting plate and the overall structure, a balancing block 228 can also be provided in the area of ​​the connecting plate 221 where the transition hopper 227 is installed.

[0050] In a more specific embodiment, the method for refining a magnesium alloy melt using the magnesium alloy melt refining device may include the following process: After the magnesium alloy liquid in the crucible of the melting furnace reaches the refining temperature, remove the excess material on the flange edge of the crucible to ensure that the flange edge of the crucible is flat and free of debris, and then place the graphite sealing gasket on the flange edge of the crucible; Use a crane to rotate the magnesium alloy melt refining device to the top of the melting furnace, align it with the center of the crucible, and slowly lower the device until the flange edge of the device vacuum cover overlaps with the flange edge of the crucible, and check whether the sealing gasket is pressed well; Start the magnesium alloy melt refining device, open the argon gas bottle valve (argon here is the refining gas, which can be used as protection gas or flux), start the variable frequency high temperature resistant motor, drive the stirring blade to rotate and perform refining; After reaching the specified refining time, stop vacuuming, lift the device away, and when the stirring blades completely leave the liquid surface, close the argon valve and the entire refining process is completed.

[0051] The following is a combination of the embodiment and the comparative example to refine the magnesium alloy melt of the same mass. The magnesium alloy melt refining device used in the embodiment and the comparative example is the aforementioned Figure 4 , Figure 5 A magnesium alloy melt refining device is shown in FIG.

[0052] Example 1 The stirring blade in the magnesium alloy melt refining device used in this embodiment has a pitch of 650 mm, a width of 150, a diameter of 150 mm, a helix angle of 100°, an orbital speed of 300 r / min, a rotation speed of 350 r / min, and the self-rotation direction of the stirring blade is the same as its own spiral direction. The refining time of 7 to 9 minutes can meet the refining effect requirements.

[0053] Example 2 The stirring blade in the magnesium alloy melt refining device used in this embodiment has a pitch of 650 mm, a width of 150 mm, a diameter of 150 mm, a helix angle of 100°, an orbital speed of 300 r / min, a rotation speed of 400 r / min, and the self-rotation direction of the stirring blade is the same as its own spiral direction. The refining time of 5 to 7 minutes can meet the refining effect requirements.

[0054] Example 3 The stirring blade in the magnesium alloy melt refining device used in this embodiment has a pitch of 650 mm, a width of 150 mm, a diameter of 150 mm, a helix angle of 100°, an orbital speed of 200 r / min, a rotation speed of 350 r / min, and the self-rotation direction of the stirring blade is the same as its own spiral direction. The refining time of 12 to 15 minutes can meet the refining effect requirements.

[0055] Example 4 The stirring blade in the magnesium alloy melt refining device used in this embodiment has a pitch of 650 mm, a width of 150 mm, a diameter of 150 mm, a helix angle of 100°, an orbital speed of 200 r / min, a rotation speed of 400 r / min, and the self-rotation direction of the stirring blade is the same as its own spiral direction. The refining time of 10 to 12 minutes can meet the refining effect requirements.

[0056] Comparative Example 1 The stirring blade in the magnesium alloy melt refining device used in Comparative Example 1 has a pitch of 650 mm, a width of 150 mm, a diameter of 150 mm, a helix angle of 100°, an orbital speed of 200 r / min, and a rotation speed of 400 r / min. The rotation direction of the stirring blade is opposite to its own spiral direction. In this case, the alloy will move downward and the refining effect will not be achieved.

[0057] Comparative Example 2 The stirring blade in the magnesium alloy melt refining device used in Comparative Example 2 has a pitch of 650mm, a width of 150mm, a diameter of 150mm, a helix angle of 100°, and the stirring blade only rotates on its own, with a rotation speed of 400 r / min. The rotation direction of the stirring blade is the same as its own spiral direction. In this case, the melt near the rotation of the stirring blade has a refining effect, while the melt in other areas has no refining effect.

[0058] Comparative Example 3 The stirring blade in the magnesium alloy melt refining device used in Comparative Example 3 has a pitch of 450 mm, a width of 150 mm, a diameter of 150 mm, a helix angle of 80°, an orbital speed of 200 r / min, and a rotation speed of 400 r / min. The rotation direction of the stirring blade is opposite to its own spiral direction. In this case, the melt movement speed, the contact area between the solvent and the melt, and the contact time cannot be guaranteed, and the refining effect is greatly reduced.

[0059] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A spiral stirring blade, characterized in that: The spiral stirring blade is a single spiral structure, the pitch, width and diameter of the spiral stirring blade are all equal, and the ratio of the pitch, width and diameter of the spiral stirring blade is (50~80):(13~16):(14~16), and the spiral angle of the spiral stirring blade is 100°~110°.

2. The spiral stirring blade according to claim 1, characterized in that: The width of the spiral stirring blade is 1 / 4 of the pitch; Preferably, the pitch of the spiral stirring blade is 500mm~800mm, preferably 550mm~700mm; Preferably, the width of the spiral stirring blade is 130 mm to 160 mm; Preferably, the diameter of the spiral stirring blade is 140 mm to 160 mm.

3. A stirring device for stirring a melt, used for stirring a melt in a refining container, characterized in that: include: A driving mechanism, a transmission structure and at least one stirring blade, wherein the driving mechanism is connected to the stirring blade via the transmission structure, and the stirring blade can rotate around its own axis and revolve around the axis of the output shaft of the driving mechanism under the drive of the driving mechanism, and the stirring blade is arranged in a refining container, wherein the stirring blade is the spiral stirring blade as described in claim 1 or 2.

4. The stirring device for stirring the melt according to claim 3, characterized in that: The transmission structure includes a connecting plate, at least one connecting shaft, a driving gear and at least one driven gear. The output shaft of the driving mechanism is fixedly connected to the connecting plate, the connecting shaft is fixedly connected to the stirring blade, the connecting shaft is rotatably connected to the connecting plate via a bearing, the driving gear is fixed on the output shaft of the driving mechanism, the driven gear is fixedly arranged on the connecting shaft, the driving gear is meshed with the driven gear, and the connecting plate, the connecting shaft and the stirring blade as a whole can rotate around the axis of the output shaft of the driving mechanism under the drive of the driving mechanism.

5. The stirring device for stirring the melt according to claim 3 or 4, characterized in that: The connecting shaft, the output shaft of the driving mechanism and the axis of the stirring blade are parallel; Preferably, the distance between the axis of the output shaft of the driving mechanism and the axis of the stirring blade is 1 / 2 of the radius of the refining container; Preferably, the connecting shaft and the stirring blade are coaxially arranged.

6. The stirring device for stirring the melt according to claim 4, characterized in that: include: The two stirring blades are arranged in mirror symmetry, and the two stirring blades can be driven by the same driving mechanism, and the two stirring blades rotate in the same direction.

7. A magnesium alloy melt refining device, characterized in that: include: A refining container, wherein the refining container has a receiving cavity for containing the magnesium alloy melt; The stirring device for stirring the melt according to claim 4, 5 or 6, wherein the stirring blade is arranged in the receiving chamber and is used to stir the magnesium alloy melt in the receiving chamber; The refining agent supply mechanism is used to provide the refining agent into the receiving chamber.

8. The magnesium alloy melt refining device according to claim 7, characterized in that: The connecting plate is also provided with a refining agent injection structure, the refining agent injection structure matches the refining agent supply mechanism, and the refining agent provided by the refining agent supply mechanism is injected into the receiving cavity from the refining agent injection structure; Preferably, the refining agent injection structure includes a transition hopper; Preferably, the magnesium alloy melt refining device further comprises a bracket, and the driving mechanism and the refining agent supply mechanism are both mounted on the bracket.

9. A method for refining a magnesium alloy melt, characterized in that: include: Providing the magnesium alloy melt refining device according to claim 7 or 8, injecting the magnesium alloy melt into the receiving chamber; The stirring blade is caused to rotate about its own axis and simultaneously revolve around the axis of the output shaft of the driving mechanism, so as to move the magnesium alloy melt located at the bottom of the receiving chamber upward; And, a refining agent is added to the surface of the magnesium alloy melt in the containing chamber, the refining agent contacts and mixes with the magnesium alloy melt, and impurities in the magnesium alloy melt are adsorbed by the refining agent and float up or sink with the refining agent.

10. The method for refining a magnesium alloy melt according to claim 9, characterized in that: The rotation direction of the stirring blade is the same as its own spiral direction; Preferably, the speed of the stirring blade's rotation is greater than its revolution speed; Preferably, the ratio of the speed of rotation of the stirring blade to the speed of revolution is (7-8): (4-6); Preferably, the stirring blade has a rotation speed of 350 r / min to 400 r / min, and a revolution speed of 200 r / min to 300 r / min.

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