Device and method for refining liquid magnesium

Abstract

The invention relates to the technical field of metallurgical production, in particular to a liquid magnesium refining device and method.The liquid magnesium refining device comprises a supporting cylinder part used for water spraying cooling, an electromagnetic heating furnace part and a filtering part, the electromagnetic heating furnace part comprises a furnace body and a liquid magnesium inlet and outlet cover, the filtering part comprises a retractable rod and a lifting threaded pipe, and a collecting cylinder is arranged on the retractable rod; a plurality of guide strips are hinged to the collecting barrel, and a lifting support is arranged on the lifting threaded pipe. The collecting barrel descends relative to the lifting support, so that the guide strip is driven to be vertical and collected into the lifting support, solid impurities at the bottom in the furnace body are collected into the lifting support, and then the lifting threaded pipe ascends to lift the solid impurities out of the liquid magnesium inlet and outlet cover; meanwhile, the outer wall of the furnace body is cooled by spraying water, so that a layer of solid magnesium is formed on the inner wall of the furnace body to serve as a buffer layer, and iron in the steel furnace body is prevented from being dissolved in liquid magnesium. Solid impurities can be conveniently removed, the service life of the furnace body is prolonged, and the purity and refining efficiency of liquid magnesium are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical production, and specifically to a device and method for refining liquid magnesium. Background Art

[0002] The whole process of sponge titanium production is equipped with a magnesium chloride electrolysis production process. Magnesium chloride by-produced in the reduction process is electrolyzed to produce liquid magnesium, thereby realizing the recycling of magnesium elements. The vacuum ladle is a commonly used turnover equipment in the metallurgical industry. It is a relatively large sealed container made of a steel shell lined with refractory materials. A certain vacuum degree is generated in the ladle by its self - contained negative pressure generating device to transfer the smelted liquid magnesium to other places. Affected by factors such as the hydrolysis of magnesium chloride and the oxidation of liquid magnesium, the electrolytically produced liquid magnesium will inevitably carry impurities such as magnesium oxide and needs to be purified. Currently, there are two commonly used purification processes: the refining furnace and the refining ladle. Especially for the refining ladle, because it uses an externally heated steel inner liner, long - term storage of liquid magnesium at high temperatures will cause iron elements to dissolve into the liquid magnesium, resulting in an excessive iron element content in the refined magnesium. However, if the static time of the liquid magnesium is short, metal elements such as titanium and iron and metal oxides such as magnesium oxide in the liquid magnesium have not settled sufficiently, and the effect of liquid magnesium refining cannot be achieved.

[0003] Application No. CN115747524A discloses a device and method for refining liquid magnesium. The device is used in the process of magnesium electrolysis production, including a refining furnace, a refining component, and a cover plate. The refining component is a cylindrical structure. The refining component is located in the refining furnace. A refining agent is placed in the refining component. The cover plate is located at the upper opening of the refining furnace, and the cover plate is connected to the refining component. An annular flow hole is provided on the refining component, and the annular flow hole realizes the flow of liquid magnesium. When the liquid magnesium is discharged from the refining component to the refining furnace, primary refining is carried out in the refining component. When the liquid magnesium is drawn from the refining furnace into the refining component, secondary refining is carried out in the refining component. The refining device of this invention can realize the secondary refining of liquid magnesium and improve the purity of refined magnesium.

[0004] It can indeed realize the flow transfer of liquid magnesium and carry out secondary refining. However, its furnace wall still directly contacts the liquid magnesium, which is likely to cause iron elements in the furnace wall to enter the liquid magnesium, increasing the impurity content of iron elements in the liquid magnesium and causing certain erosion to the furnace wall. Therefore, to overcome the deficiencies of the existing refining process, a new liquid magnesium refining process needs to be developed to meet the production requirements of high - quality sponge titanium. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for refining liquid magnesium to solve the problems raised in the above - mentioned background art.

[0006] To achieve the above purpose, on the one hand, the present invention provides the following technical solutions:

[0007] A flat pasted and coated decorative painting device, comprising a support cylinder part for accommodating liquid magnesium and cooling it, an electromagnetic heating furnace part for heating magnesium, and a filtering part for cleaning sediment impurities;

[0008] The support cylinder part includes several support legs, a cylindrical barrel arranged on the support legs, a drain pipe communicated with one side of the barrel, a lower water pipe ring and an upper water pipe ring fixedly arranged around the outside of the barrel. A plurality of spray heads for spraying water into the barrel are inserted at equal intervals at the inner circle of the lower water pipe ring. A plurality of watering pipes are inserted at equal intervals at the inner circle of the upper water pipe ring. A water injection pipe is inserted on one side of the watering pipe;

[0009] The electromagnetic heating furnace part includes a furnace body arranged inside the barrel, a liquid magnesium inlet and outlet cover arranged on the top of the furnace body, several horizontal brackets fixedly arranged on the inner wall of the barrel, several vertical brackets vertically fixed on the horizontal brackets, a spiral coil spirally passing through all the vertical brackets, and electrical connection heads arranged at both ends of the spiral coil;

[0010] The filtering part includes a circular plate arranged at the bottom ends of all the support legs, a cylinder arranged on the circular plate, a servo motor installed at the top end of the cylinder, a rotating cylinder coaxially connected to the output shaft of the servo motor, a lifting screw pipe threadedly inserted at the centers of the barrel and the furnace body, a retractable rod coaxially inserted into the lifting screw pipe, several guiding strips arranged at the top of the retractable rod, and a locking mechanism arranged at the bottom surface of the barrel for locking the lifting screw pipe. A cylindrical block is fixedly arranged at the center of the bottom of the rotating cylinder. A hexagonal plug is fixedly arranged at the center of the top surface of the cylindrical block. The rotating cylinder is in a centrosymmetric shape, with an open top and a closed bottom. The lower part inside the rotating cylinder is a cylindrical groove. The inner space of the barrel communicating the upper end of the cylindrical groove to the open top of the rotating cylinder is an inner hexagonal cavity; A hexagonal sliding head for slidingly inserting into the inner hexagonal cavity is coaxially arranged at the bottom end of the lifting screw pipe. A lifting support is coaxially arranged at the top of the hexagonal sliding head; A collecting cylinder for containing solid impurities is fixedly arranged at the top of the retractable rod. An inner hexagonal groove for slidingly inserting the hexagonal plug is coaxially opened at the bottom of the retractable rod.

[0011] In the technical solution of the present invention, the inside of the furnace body is sequentially a heating cavity, a sediment cavity and a lifting cavity from top to bottom. The heating cavity is cylindrical, the sediment cavity is in the shape of an inverted trapezoid with a thick top and a thin bottom, and the lifting cavity is cylindrical; At least four support legs are provided and the upper ends of the support legs are higher than the height of the bottom of the barrel. The furnace body is fixedly installed at the upper ends of all the support legs through bolts. The furnace body does not contact the barrel, and the support legs pass through the bottom of the barrel.

[0012] In the technical solution of the present invention, a drain pipe is also inserted and communicated outside the cylinder body, and the height of the drain pipe is lower than the height of the lowest end of the heating chamber; the furnace body does not contact the spiral coil.

[0013] In the technical solution of the present invention, a central pillar is vertically fixed on the inner bottom surface of the collection cylinder, a hinge shaft ring is fixed at the upper end of the central pillar, and all the guiding strips are hinged on the hinge shaft ring; the outer diameter of the collection cylinder is larger than the outer diameter of the hinge shaft ring; when the hinge shaft ring is at the lowest height of the precipitation chamber, all the guiding strips can contact the furnace wall of the furnace body corresponding to the precipitation chamber.

[0014] In the technical solution of the present invention, a plurality of slide rail rods are vertically welded and fixed in a circumferential arrangement in the middle of the top surface of the circular plate, and the same slide plate is slidably inserted on all the slide rail rods; the servo motor is fixedly installed in the middle of the top surface of the slide plate by bolts; the rotating cylinder, the lifting threaded pipe and the winding and unwinding rod are all coaxially arranged.

[0015] In the technical solution of the present invention, a plurality of locking mechanisms for fixing the lifting of the lifting threaded pipe are symmetrically arranged at the bottom of the cylinder body. The locking mechanism includes a convex block welded and fixed at the lower end of the cylinder body, a sliding rod fixed on one side of the convex block, a slider slidably connected to the sliding rod, and a tightening spring connected between the slider and the convex block on the same side. The tightening spring is also slidably sleeved on the corresponding sliding rod on the same side. All the sliding rods are located between the corresponding convex blocks and the lifting threaded pipe; the lifting support is threadedly inserted into the lifting cavity, and the inner height of the lifting support is less than the depth of the lifting cavity.

[0016] In the technical solution of the present invention, a round head pin is fixedly arranged on one side of the slider close to the lifting threaded pipe, and the side surface of the slider close to the lifting threaded pipe is a threaded curved surface matching the external threaded curved surface of the lifting threaded pipe; a round head slot is opened at each corresponding position of the external part of the lifting threaded pipe for each round head pin; when the rotating cylinder rises to the highest position, the slider slides and is simultaneously slidably clamped with the lifting threaded pipe and the rotating cylinder.

[0017] In the technical solution of the present invention, the length of the hexagonal plug is greater than or equal to the depth of the internal hexagonal groove, the depth of the internal hexagonal groove is greater than the lifting stroke of the collection cylinder in the lifting support, and the collection cylinder is threadedly inserted into the lifting support; a plurality of ventilation strip grooves are evenly opened on the outer part of the winding and unwinding rod.

[0018] In the technical solution of the present invention, the lifting threaded tube is provided with a plurality of vent holes at the upper end of the hexagonal sliding head, the cylindrical block is slidably plugged into the bottom of the hexagonal sliding head, and the top of the cylindrical block is always lower than the top of the hexagonal sliding head, the inner height of the cylindrical block is smaller than the depth of the cylindrical groove, and the circumscribed circle diameter of the hexagonal plug is smaller than the outer diameter of the retractable rod;

[0019] The inner height of the hexagonal sliding head is less than or equal to the depth of the cylindrical groove, the inner diameter of the cylindrical groove is equal to the circumscribed circle diameter of the inner hexagonal cavity, the circumscribed circle diameter of the hexagonal sliding head is equal to the inscribed circle diameter of the inner hexagonal cavity, and the inscribed circle diameter of the inner hexagonal cavity is larger than the outer diameter of the lifting threaded tube.

[0020] On the other hand, the present invention also provides a method for refining liquid magnesium, comprising the following steps:

[0021] S1. Introduce tap water into the water pipe and continuously spray water on the outer wall of the furnace to cool it down;

[0022] S2. Open the liquid magnesium access cover, connect the vacuum ladle and input the molten liquid magnesium. After filling, close the vacuum ladle and energize the spiral coil through the electrical connector to generate eddy currents inside the furnace body and the molten liquid magnesium inside the spiral coil, thereby increasing the temperature and maintaining the magnesium in a molten state.

[0023] S3. Wait for a while, wait for the impurities in the molten magnesium to solidify, raise the temperature to between 700-720 degrees Celsius, start the vacuum ladle connected to the liquid magnesium access cover to extract the refined liquid magnesium, and remove the vacuum ladle;

[0024] S4. The control cylinder rises, and the servo motor rises accordingly. The hexagonal plug is inserted into the inner hexagonal slot, and the servo motor is started to drive the retracting rod to rotate relative to the lifting threaded tube to descend, driving the guide bar to be retracted into the lifting support, thereby guiding the remaining solid impurities at the bottom of the furnace body into the lifting support;

[0025] S5. When the collecting cylinder drops to the bottom, the servo motor is turned off, and the control cylinder makes the rotating cylinder drop, then the lifting threaded tube rises relative to the lifting cylinder, and the hexagonal sliding head rises and slides from the cylindrical groove to be inserted into the inner hexagonal cavity;

[0026] S6. The servo motor is controlled again to drive the drum to rotate, and the hexagonal cavity of the drum drives the hexagonal sliding head inserted therein to rotate. Due to the external thread of the lifting threaded tube, the lifting threaded tube rises, and drives the retractable rod and the vertical guide bar in the lifting support to rise, and finally the fixed impurities at the bottom are lifted out of the liquid magnesium access cover;

[0027] S7. Subsequently, after the solid impurities in the lifting support are removed, the lifting threaded tube and the retracting rod are returned to their original positions by controlling the servo motor and the air cylinder to wait for the next refining.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The device and method for refining liquid magnesium, after refining and precipitating solid impurities in the furnace body, extract the liquid magnesium, at this time the device can make the collecting cylinder descend relative to the lifting support, thereby driving the guide bar to be vertical and stored in the lifting support, and then guiding the solid impurities at the bottom of the furnace body into the lifting support, and then the lifting support with solid impurities is lifted up through the lifting threaded pipe to exit the liquid magnesium access cover, and the staff removes the solid impurities and waits for the next refining. Therefore, it is convenient to clean the solid impurities in the furnace body during refining, prolonging the service life and refining efficiency of the furnace body, ensuring the refining environment in the furnace body, and thus improving the purity of the liquid magnesium.

[0030] 2. The device and method for refining liquid magnesium, since both the liquid magnesium and the furnace body are good conductors, can heat the liquid magnesium in the air and uniformly through the spiral coil in the electromagnetic heating furnace part, thereby avoiding the introduction of additional heating components that contact the liquid magnesium and avoiding the generation of new impurities; through the various water spraying components in the supporting cylinder part, water is continuously sprayed on the outer wall of all furnace bodies to cool down when the liquid magnesium is stationary and refined, so that a layer of solid magnesium is formed on the inner wall of the furnace body as a buffer layer, thereby avoiding the erosion of the inner wall of the furnace body by the liquid magnesium, extending the service life of the furnace body, and at the same time reducing the dissolution of iron elements in the steel furnace body into the liquid magnesium, indirectly extending the stationary time of the liquid magnesium, and then working together to improve the liquid magnesium refining effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0032] Figure 1 It is one of the overall structural schematic diagrams of the present invention;

[0033] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the local structure of the support tube part in the present invention;

[0035] Figure 4 It is a schematic diagram of the longitudinal cross-sectional structure of the present invention;

[0036] Figure 5 It is a schematic diagram of the local structure of the filter part in the present invention;

[0037] Figure 6 Structural schematic diagram of the spiral coil in the present invention;

[0038] Figure 7 is Figure 4 Partial enlarged view at position B in;

[0039] Figure 8 is Figure 4 Partial enlarged view at position C in;

[0040] Figure 9 Structural schematic diagram of the circular plate and the cylinder in the present invention;

[0041] Figure 10 is Figure 1 Partial enlarged view at position A in;

[0042] Figure 11 Structural schematic diagram of the locking mechanism in the present invention;

[0043] Figure 12 Structural schematic diagram of the retractable rod in the present invention;

[0044] Figure 13 is Figure 12 Partial enlarged view at position D in;

[0045] Figure 14 Structural schematic diagram of the lifting screw pipe in the present invention;

[0046] Figure 15 is Figure 14 Partial enlarged view at position E in;

[0047] Figure 16 Sectional structural schematic diagram of the rotating cylinder in the present invention;

[0048] Figure 17 Sectional view of the rotating cylinder in the present invention;

[0049] The meanings of each label in the figure are as follows:

[0050] 1. Support cylinder part; 10. Support leg; 11. Cylinder body; 12. Drain pipe; 13. Lower water pipe loop; 131. Sprinkler head; 14. Upper water pipe loop; 141. Watering pipe; 1411. Water spraying pipe; 15. Water delivery pipe;

[0051] 2. Electromagnetic heating furnace part; 20. Furnace body; 201. Heating cavity; 202. Precipitation cavity; 203. Lifting cavity; 21. Liquid magnesium inlet and outlet cover; 22. Horizontal support; 23. Vertical support; 24. Spiral coil; 25. Electric connection head;

[0052] 3. Filtering section; 30. Circular plate; 31. Cylinder; 32. Slide rail rod; 33. Slide plate; 34. Servo motor; 35. Rotating cylinder; 350. Cylindrical block; 351. Hexagonal plug; 352. Cylindrical groove; 353. Internal hexagonal cavity; 36. Lifting screw pipe; 360. Round head slot; 361. Hexagonal sliding head; 362. Vent hole; 363. Lifting support; 37. Retracting and extending rod; 370. Internal hexagonal groove; 371. Vent strip groove; 372. Collection cylinder; 373. Central support column; 374. Hinge shaft ring; 38. Guide strip; 39. Locking mechanism; 390. Protrusion; 391. Slide rod; 392. Slide block; 3921. Round head pin; 393. Tightening spring. Detailed implementation mode

[0053] The following will clearly and completely describe the technical solutions in the present invention in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts belong to the scope of protection of the present invention.

[0054] Please refer to Figures 1-17 As shown, this embodiment provides a technical solution:

[0055] A device for refining liquid magnesium includes a support cylinder part 1 for accommodating liquid magnesium and cooling it, an electromagnetic heating furnace part 2 for heating magnesium, and a filtering part 3 for cleaning precipitated impurities;

[0056] The support cylinder part 1 includes several support legs 10, a cylindrical barrel 11 arranged on the support legs 10, a drain pipe 12 communicating with one side of the barrel 11, a lower water pipe ring 13 and an upper water pipe ring 14 fixedly arranged around the outside of the barrel 11. A plurality of spray heads 131 for spraying water into the barrel are inserted at equal intervals in the inner circle of the lower water pipe ring 13. A plurality of watering pipes 141 are inserted at equal intervals in the inner circle of the upper water pipe ring 14. One side of the watering pipe 141 is inserted with a water injection pipe 1411;

[0057] The electromagnetic heating furnace part 2 includes a furnace body 20 arranged inside the barrel 11, a liquid magnesium inlet and outlet cover 21 arranged on the top of the furnace body 20, several horizontal brackets 22 fixed on the inner wall of the barrel 11, several vertical brackets 23 vertically fixed on the horizontal brackets, a spiral coil 24 spirally passing through all the vertical brackets 23, and electrical connection heads 25 arranged at both ends of the spiral coil 24 to stably fix the spiral coil 24; The water injection pipe 1411 can spray water upward and fall on the upper surface of the furnace body 20 for cooling;

[0058] The filtering part 3 includes a circular plate 30 arranged at the bottom end of all the support legs 10, a cylinder 31 arranged on the circular plate 30, a servo motor 34 installed at the top end of the cylinder 31, a rotating cylinder 35 coaxially connected to the output shaft of the servo motor 34, a lifting screw tube 36 threadedly inserted at the centers of the cylinder body 11 and the furnace body 20, a retractable rod 37 coaxially inserted into the lifting screw tube 36, a plurality of guiding strips 38 arranged at the top of the retractable rod 37, and a locking mechanism 39 arranged at the bottom surface of the cylinder body 11 for locking the lifting screw tube 36. A cylindrical block 350 is fixedly arranged at the center of the bottom of the rotating cylinder 35, and a hexagonal plug 351 is fixedly arranged at the center of the top surface of the cylindrical block 350. The rotating cylinder 35 has a centrosymmetric shape, with an open top and a closed bottom. The lower part of the inside of the rotating cylinder 35 is a cylindrical groove 352, and the inner space of the cylinder connecting the upper end of the cylindrical groove 352 to the open top of the rotating cylinder 35 is an inner hexagonal cavity 353. The bottom end of the lifting screw tube 36 is coaxially provided with a hexagonal sliding head 361 for slidingly inserting into the inner hexagonal cavity 353, and a lifting support 363 is coaxially arranged at the top of the hexagonal sliding head 361. A collection cylinder 372 for containing solid impurities is fixedly arranged at the top of the retractable rod 37, and an inner hexagonal groove 370 for slidingly inserting the hexagonal plug 351 is coaxially opened at the bottom of the retractable rod 37.

[0059] Specifically, inside the furnace body 20, from top to bottom, there are a heating chamber 201, a precipitation chamber 202, and a lifting chamber 203 in sequence. The heating chamber 201 is cylindrical in shape. The precipitation chamber 202 is in the shape of an inverted trapezoid with an upper thick and lower thin shape, so as to facilitate guiding the solid impurities precipitated at the bottom into the collection cylinder 372. The lifting chamber 203 is cylindrical in shape. At least four support legs 10 are provided, and the upper ends of the support legs 10 are higher than the height of the bottom of the cylinder body 11, so as to reserve a certain water storage space between the bottom of the cylinder body 11 and the furnace body 20. The furnace body 20 is fixedly installed at the upper ends of all the support legs 10 through bolts, and the furnace body 20 does not contact the cylinder body 11. The support legs 10 pass through the bottom of the cylinder body 11.

[0060] Specifically, a drain pipe 12 is also inserted and connected to the outside of the cylinder body 11. The height of the drain pipe 12 is lower than the lowest height of the heating chamber 201, so that when the water sprayed for cooling accumulates to the horizontal height of the bottom end of the precipitation chamber 202, it can be discharged. The furnace body 20 does not contact the spiral coil 24. Spraying water for cooling forms a layer of solid magnesium on the inner wall of the furnace body as a buffer layer, which avoids the erosion of the inner wall of the furnace body by liquid magnesium and reduces the dissolution of iron elements in the steel furnace body into the liquid magnesium at the same time.

[0061] Furthermore, a central pillar 373 is vertically fixed to the inner bottom surface of the collecting cylinder 372, and a hinge ring 374 is fixed to the upper end of the central pillar 373, and all the guide strips 38 are hinged on the hinge ring 374; the outer diameter of the collecting cylinder 372 is larger than the outer diameter of the hinge ring 374, thereby allowing the hinge ring 374 to drive the guide strips 38 hinged thereon to descend and contact the upper edge of the collecting cylinder 372, and then the guide strips 38 change their posture and vertically retract into the collecting cylinder 372 and fit closely to the arc inner wall of the collecting cylinder 372; when the hinge ring 374 is located at the lowest height of the precipitation chamber 202, all the guide strips 38 can contact the furnace wall of the furnace body 20 corresponding to the precipitation chamber 202, so that after solid magnesium is formed at the furnace wall of the heating and refining furnace body 20, the guide strips 38 do not contact the liquid magnesium inside the furnace body 20, thereby preventing the iron element in the steel guide strips 38 from dissolving into the liquid magnesium.

[0062] In this embodiment, Figure 9 As shown in the figure, a number of slide rails 32 are vertically welded and fixed in a circular arrangement in the middle of the top surface of the circular plate 30, and the same slide plate 33 is slidably inserted on all the slide rails 32. The servo motor 34 is fixedly installed in the center of the top surface of the slide plate 33 by bolts, so as to stabilize the lifting and rotation of the rotating drum 35; the rotating drum 35, the lifting threaded tube 36 and the retracting rod 37 are all coaxially arranged.

[0063] Preferably, a plurality of locking mechanisms 39 for fixing the lifting and lowering of the lifting threaded tube 36 are symmetrically arranged at the bottom of the cylinder 11, and the locking mechanism 39 includes a protrusion 390 welded and fixed to the lower end of the cylinder 11, a slide bar 391 fixed to one side of the protrusion 390, a slider 392 slidably connected to the slide bar 391, and a tightening spring 393 connected between the slider 392 and the protrusion 390 on the same side, and the tightening spring 393 is also slidably sleeved on the slide bar 391 on the corresponding side, and all the slide bars 391 are located between the corresponding protrusion 390 and the lifting threaded tube 36. The upper edge of the rotating drum 35 is an inwardly chamfered circular arc, and the lower end of the contact slider 392 is an inclined curved surface corresponding to the chamfered upper edge of the rotating drum 35. When the rotating drum 35 rises, its chamfer contacts the lower inclined curved surface of the slider 392, thereby extending the tightening spring 393 and sliding the contact slider 392 inward. The side of the contact slider 392 that slides close to the lifting threaded tube 36 is provided with a thread that can be connected with the external thread of the lifting threaded tube 36. The lifting support 363 is threadedly inserted into the lifting chamber 203, and the inner height of the lifting support 363 is less than the depth of the lifting chamber 203.

[0064] Specifically, a round head pin 3921 is fixedly arranged on one side of the slider 392 close to the lifting screw pipe 36, and the side surface of the slider 392 close to the lifting screw pipe 36 is a threaded curved surface matching the external threaded curved surface of the lifting screw pipe 36; a round head slot 360 is opened at the corresponding position of each round head pin 3921 on the outside of the lifting screw pipe 36. When the rotating cylinder 35 rises, the slider 392 slides inward and can drive the round head pin 3921 to insert into the corresponding round head slot 360, so as to fix the lifting screw pipe 36; when the lifting screw pipe 36 is fixed, the relative lifting and lowering of the retractable rod 37 with respect to the lifting screw pipe 36 can be controlled; when the rotating cylinder 35 rises to the highest position, the slider 392 slides and is simultaneously slidably clamped with both the lifting screw pipe 36 and the rotating cylinder 35.

[0065] Preferably, the length of the hexagonal plug 351 is greater than or equal to the depth of the internal hexagonal groove 370, the depth of the internal hexagonal groove 370 is greater than the lifting stroke of the collection cylinder 372 in the lifting support 363, and the collection cylinder 372 is threadedly inserted into the lifting support 363, so as to allow the collection cylinder 372 to descend to the bottom of the lifting support 363; a plurality of ventilation strip grooves 371 are uniformly opened on the outside of the retractable rod 37, so that when the collection cylinder 372 descends, the air between the collection cylinder 372 and the lifting support 363 can flow downward along the ventilation strip grooves 371.

[0066] Specifically, a plurality of ventilation holes 362 are opened at the upper end of the hexagonal sliding head 361 of the lifting screw pipe 36. The cylindrical block 350 is slidably inserted at the bottom of the hexagonal sliding head 361, and the top of the cylindrical block 350 is always lower than the top of the hexagonal sliding head 361. The internal height of the cylindrical block 350 is less than the depth of the cylindrical groove 352. The circumscribed circle diameter of the hexagonal plug 351 is less than the outer diameter of the retractable rod 37. At least one ventilation strip groove 371 communicates with one ventilation hole 362, and the air flowing downward along the ventilation strip groove 371 can enter the ventilation hole 362 and then flow upward out of the top end of the rotating cylinder 35 between the threaded outer wall of the lifting screw pipe 36 and the arc inner wall of the rotating cylinder 35, so as to ensure that the collection cylinder 372 can be lifted and lowered smoothly;

[0067] The internal height of the hexagonal sliding head 361 is less than or equal to the depth of the cylindrical groove 352. The inner diameter of the cylindrical groove 352 is equal to the circumscribed circle diameter of the internal hexagonal cavity 353. The circumscribed circle diameter of the hexagonal sliding head 361 is equal to the inscribed circle diameter of the internal hexagonal cavity 353; the inscribed circle diameter of the internal hexagonal cavity 353 is greater than the outer diameter of the lifting screw pipe 36; when the hexagonal plug 351 is inserted into the internal hexagonal groove 370 and rotated to drive the retractable rod 37 to descend to the lowest position, the hexagonal sliding head 361 can just be aligned with the internal hexagonal cavity 353. Then, the rotating cylinder 35 is controlled to descend by the air cylinder 31, and the hexagonal sliding head 361 is slidably inserted into the internal hexagonal cavity 353. At this time, when the rotating cylinder 35 is rotated again, the hexagonal sliding head 361 can rotate and slide upward in the internal hexagonal cavity 353 and drive the entire lifting screw pipe 36 to rise.

[0068] The method for refining liquid magnesium of the present invention includes the following steps:

[0069] S1. Tap water is introduced into the water delivery pipe 15. The tap water enters the lower water pipe loop 13 and the upper water pipe loop 14 and then sprays out from the nozzles 131, the watering pipes 141 and the water injection pipes 1411, so as to continuously spray water on the outer wall of the furnace body 20 for cooling.

[0070] S2. Open the liquid magnesium inlet / outlet cover 21, connect a vacuum ladle and input molten liquid magnesium. After filling, close the vacuum ladle. Electrify the spiral coil 24 through the electrical connection head 25, so that eddy currents are generated inside the furnace body 20 and the molten liquid magnesium inside the spiral coil 24, thereby increasing the temperature and maintaining the magnesium in a molten state.

[0071] S3. Wait for a period of time. After the impurity solids in the molten liquid magnesium precipitate, raise the temperature to between 700 and 720 degrees Celsius. Start the vacuum ladle connected to the liquid magnesium inlet / outlet cover 21 to pump out the refined liquid magnesium, and detach the vacuum ladle.

[0072] S4. Control the cylinder 31 to rise. The servo motor 34 rises accordingly, the rotating cylinder 35 rises, so that the locking mechanism 39 can slide and be clamped on the upper edge of the rotating cylinder 35 and at the same time be clamped and fixed to the lifting screw pipe 36. The hexagonal plug 351 is inserted into the internal hexagonal groove 370. Start the servo motor 34 to rotate the retractable rod 37 and sleeved on the hexagonal plug 351 to slide downward, thereby driving the retractable rod 37 to rotate and descend relative to the lifting screw pipe 36, driving the guide strip 38 to retract into the lifting support 363, so as to guide the remaining solid impurities at the bottom of the furnace body 20 into the lifting support 363.

[0073] S5. When the collection cylinder 372 touches the bottom, the servo motor 34 is turned off. The hexagonal sliding head 361 can just be aligned with the internal hexagonal cavity 353 up and down. Control the cylinder 31 to make the rotating cylinder 35 descend, then the lifting screw pipe 36 rises relative to the rotating cylinder 35, and the hexagonal sliding head 361 slides upward from the cylindrical groove 352 and is inserted into the internal hexagonal cavity 353.

[0074] S6. Control the servo motor 34 to drive the rotating cylinder 35 to rotate again. The internal hexagonal cavity 353 of the rotating cylinder 35 drives the hexagonal sliding head 361 inserted and sleeved therein to rotate. Due to the external thread of the lifting screw pipe 36, the lifting screw pipe 36 rises, and drives the retractable rod 37 and the vertical guide strip 38 in the lifting support 363 to rise, finally lifting the fixed impurities at the bottom out of the liquid magnesium inlet / outlet cover 21.

[0075] S7. Subsequently, after removing the solid impurities in the lifting support 363, control the servo motor 34 and the cylinder 31 to return the lifting screw pipe 36 and the retractable rod 37 to their original positions and wait for the next refining.

[0076] Moreover, it should be noted that components such as the servo motor 34, the cylinder 31, and the controller involved in the present invention are all common standard components or components known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or through conventional experimental methods, and will not be elaborated here.

[0077] Finally, it should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for refining liquid magnesium, characterized in that: It comprises a support tube part (1) for containing liquid magnesium and cooling it, an electromagnetic heating furnace part (2) for heating the magnesium, and a filter part (3) for cleaning precipitated impurities; The support tube part (1) comprises a plurality of support legs (10), a cylindrical tube body (11) arranged on the support legs (10), a drainage pipe (12) connected to one side of the tube body (11), a lower water pipe ring (13) and an upper water pipe ring (14) surrounding and fixed on the outside of the tube body (11), a plurality of nozzles (131) for spraying water into the tube being inserted at equal intervals at the inner circle of the lower water pipe ring (13), a plurality of watering pipes (141) being inserted at equal intervals at the inner circle of the upper water pipe ring (14), and a water jetting pipe (1411) being inserted at one side of the watering pipe (141); The electromagnetic heating furnace part (2) comprises a furnace body (20) arranged inside the cylinder (11), a liquid magnesium inlet and outlet cover (21) arranged on the top of the furnace body (20), a plurality of horizontal brackets (22) fixed on the inner wall of the cylinder (11), a plurality of vertical brackets (23) vertically fixed on the horizontal brackets, a spiral coil (24) spirally passing through all the vertical brackets (23), and electrical connectors (25) arranged at both ends of the spiral coil (24); The filtering part (3) comprises a circular plate (30) arranged at the bottom ends of all the supporting legs (10), a cylinder (31) arranged on the circular plate (30), a servo motor (34) installed at the top end of the cylinder (31), a rotating drum (35) coaxially connected to the output shaft of the servo motor (34), a lifting threaded tube (36) threadedly inserted at the center of the cylinder body (11) and the furnace body (20), a retracting rod (37) coaxially inserted in the lifting threaded tube (36), a plurality of guide strips (38) arranged at the top of the retracting rod (37), and a locking mechanism (39) arranged at the bottom surface of the cylinder body (11) for locking the lifting threaded tube (36). A cylindrical block (350) is fixedly arranged at the center of the bottom of the rotating drum (35), and six cylindrical blocks (350) are fixedly arranged at the center of the top surface of the cylindrical block (350). The rotary cylinder (35) is of a centrally symmetrical shape, with an open top and a closed bottom. The lower part of the rotary cylinder (35) is a cylindrical groove (352), and the inner space connecting the upper end of the cylindrical groove (352) to the open top of the rotary cylinder (35) is an inner hexagonal cavity (353); the bottom end of the lifting threaded tube (36) is coaxially provided with a hexagonal sliding head (361) for slidingly plugging into the inner hexagonal cavity (353), and the top of the hexagonal sliding head (361) is coaxially provided with a lifting support (363); the top of the retracting rod (37) is fixedly provided with a collecting cylinder (372) for containing solid impurities, and the bottom of the retracting rod (37) is coaxially provided with an inner hexagonal groove (370) for slidingly plugging the hexagonal plug (351).

2. The device for refining liquid magnesium according to claim 1, characterized in that: The interior of the furnace body (20) comprises, from top to bottom, a heating chamber (201), a precipitation chamber (202) and a lifting chamber (203); the heating chamber (201) is cylindrical; the precipitation chamber (202) is in the shape of an inverted terrace with a thick top and a thin bottom; and the lifting chamber (203) is cylindrical; at least four supporting legs (10) are provided, and the upper ends of the supporting legs (10) are higher than the height of the bottom of the cylinder (11); the furnace body (20) is fixedly mounted on the upper ends of all the supporting legs (10) by bolts; the furnace body (20) does not contact the cylinder (11); and the supporting legs (10) pass through the bottom of the cylinder (11).

3. The device for refining liquid magnesium according to claim 2, characterized in that: The outside of the cylinder (11) is also connected to a drainage pipe (12), and the height of the drainage pipe (12) is lower than the height of the bottom end of the heating chamber (201); the furnace body (20) is not in contact with the spiral coil (24).

4. The device for refining liquid magnesium according to claim 3, characterized in that: A central pillar (373) is vertically fixed to the inner bottom surface of the collecting cylinder (372), a hinge ring (374) is fixed to the upper end of the central pillar (373), and all the guide strips (38) are hinged to the hinge ring (374); the outer diameter of the collecting cylinder (372) is larger than the outer diameter of the hinge ring (374); when the hinge ring (374) is located at the lowest height of the precipitation chamber (202), all the guide strips (38) can contact the furnace wall of the furnace body (20) corresponding to the precipitation chamber (202).

5. The device for refining liquid magnesium according to claim 4, characterized in that: A plurality of slide rails (32) are vertically welded and fixed in a circumferential arrangement in the middle of the top surface of the circular plate (30); a same slide plate (33) is slidably inserted on all the slide rails (32); the servo motor (34) is fixedly mounted at the center of the top surface of the slide plate (33) by bolts; the rotating drum (35), the lifting threaded tube (36) and the retracting rod (37) are all coaxially arranged.

6. The device for refining liquid magnesium according to claim 5, characterized in that: A plurality of locking mechanisms (39) for fixing the lifting and lowering of the lifting threaded tube (36) are symmetrically arranged at the bottom of the cylinder (11), and the locking mechanisms (39) include a protrusion (390) welded and fixed to the lower end of the cylinder (11), a sliding rod (391) fixed to one side of the protrusion (390), a slider (392) slidably connected to the sliding rod (391), and a tightening spring (393) connected between the slider (392) and the protrusion (390) on the same side, and the tightening spring (393) is also slidably sleeved on the sliding rod (391) on the corresponding side, and all the sliding rods (391) are located between the corresponding protrusion (390) and the lifting threaded tube (36); the lifting support (363) is threadedly inserted into the lifting cavity (203), and the inner height of the lifting support (363) is less than the depth of the lifting cavity (203).

7. The device for refining liquid magnesium according to claim 6, characterized in that: A round head latch (3921) is fixedly provided on one side of the slider (392) close to the lifting threaded tube (36); a side surface of the slider (392) close to the lifting threaded tube (36) is a threaded curved surface matching the external threaded curved surface of the lifting threaded tube (36); a round head slot (360) is provided on the outside of the lifting threaded tube (36) corresponding to each round head latch (3921); when the rotating drum (35) rises to the highest point, the slider (392) slides and is simultaneously slidably engaged with the lifting threaded tube (36) and the rotating drum (35).

8. The device for refining liquid magnesium according to claim 7, characterized in that: The length of the hexagonal plug (351) is greater than or equal to the depth of the inner hexagonal groove (370), the depth of the inner hexagonal groove (370) is greater than the lifting stroke of the collecting tube (372) in the lifting bracket (363), and the collecting tube (372) is threadedly inserted in the lifting bracket (363); a plurality of ventilation strip grooves (371) are evenly opened on the outside of the retractable rod (37).

9. The device for refining liquid magnesium according to claim 8, characterized in that: The lifting threaded tube (36) is provided with a plurality of vent holes (362) at the upper end of the hexagonal sliding head (361), the cylindrical block (350) is slidably plugged into the bottom of the hexagonal sliding head (361), and the top of the cylindrical block (350) is always lower than the top of the hexagonal sliding head (361), the inner height of the cylindrical block (350) is smaller than the depth of the cylindrical groove (352), and the circumscribed circle diameter of the hexagonal plug (351) is smaller than the outer diameter of the retractable rod (37); The inner height of the hexagonal sliding head (361) is less than or equal to the depth of the cylindrical groove (352), the inner diameter of the cylindrical groove (352) is equal to the circumscribed circle diameter of the inner hexagonal cavity (353), the circumscribed circle diameter of the hexagonal sliding head (361) is equal to the inscribed circle diameter of the inner hexagonal cavity (353), and the inscribed circle diameter of the inner hexagonal cavity (353) is greater than the outer diameter of the lifting threaded tube (36).

10. A method for refining liquid magnesium, using the liquid magnesium refining device according to claim 9, characterized in that: The following steps are involved: S1. Introduce tap water into the water pipe (15) and continuously spray water on the outer wall of the furnace (20) to cool it down; S2. Open the liquid magnesium access cover (21), connect the vacuum ladle and input the molten liquid magnesium, close the vacuum ladle after it is full, and energize the spiral coil (24) through the power connector (25), so that the furnace body (20) inside the spiral coil (24) and the molten liquid magnesium generate eddy currents, thereby increasing the temperature and maintaining the magnesium in a molten state; S3. Wait for a while, after the impurities in the molten magnesium solid precipitation, raise the temperature to between 700-720 degrees Celsius, start the vacuum ladle connected to the liquid magnesium access cover (21) to extract the refined liquid magnesium, and remove the vacuum ladle; S4. The control cylinder (31) rises, and the servo motor (34) rises accordingly. The hexagonal plug (351) is inserted into the inner hexagonal groove (370), and the servo motor (34) is started to drive the retracting rod (37) to rotate relative to the lifting threaded tube (36) and to lower, thereby driving the guide bar (38) to be retracted into the lifting support (363), thereby guiding the solid impurities remaining at the bottom of the furnace body (20) into the lifting support (363); S5. When the collecting cylinder (372) drops to the bottom, the servo motor (34) is turned off, and the control cylinder (31) causes the rotating cylinder (35) to drop, and the lifting threaded tube (36) rises relative to the lifting cylinder (35), and the hexagonal sliding head (361) rises from the cylindrical groove (352) and slides into the inner hexagonal cavity (353); S6. The servo motor (34) is controlled again to drive the rotating drum (35) to rotate, and the hexagonal cavity (353) of the rotating drum (35) drives the hexagonal sliding head (361) slidably inserted therein to rotate, and the lifting threaded tube (36) is lifted due to the external thread of the lifting threaded tube (36), and the retracting rod (37) and the vertical guide bar (38) in the lifting support (363) are lifted, and finally the fixed impurities at the bottom are lifted out of the liquid magnesium inlet and outlet cover (21); S7. Subsequently, after the solid impurities in the lifting support (363) are removed, the lifting threaded tube (36) and the retracting rod (37) are returned to their original positions by controlling the servo motor (34) and the cylinder (31) to wait for the next refining.

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