A kind of protecting slag quantitative adding component and continuous casting equipment and its method

Abstract

The present application belongs to the technical field of continuous casting, in particular to a kind of protecting slag quantitative adding assembly and continuous casting equipment and method thereof, solve the problem of not accurate, discharging pipe is heated and is easy to form nodule and the uneven problem of protecting slag covering, the assembly includes pedestal, stand, bearing table, tundish, crystallizer, throwing part and vibration part, throwing part is equipped with material box, drum etc., drum is equipped with discharge chute and piston plate to form effective containing bin, motor is driven through bevel gear driving shaft, drum rotates and throws protecting slag, adjusting part can adjust the volume of effective containing bin, vibration part makes crystallizer vibrate, promote protecting slag evenly cover, continuous casting equipment includes the above-mentioned assembly and rotary table, driving part, rotary table can transport ladle, the assembly can accurately and quantitatively add protecting slag, evenly cover steel liquid surface, prevent nodule formation, improve the quality of casting blank.

Description

Technical Field

[0001] This invention relates to the field of continuous casting technology, and in particular to a component for quantitative addition of protective slag, a continuous casting equipment, and a method thereof. Background Technology

[0002] In continuous casting, adding protective slag to the surface of molten steel in the mold is a crucial step in ensuring billet quality. The protective slag isolates the steel from air, preventing secondary oxidation and absorbing inclusions. It also lubricates the billet, controls the temperature of the molten steel in the mold, and reduces adhesion between the billet shell and the mold wall. The precision of the amount added and the uniformity of the coverage directly affect the surface quality and internal properties of the billet. Insufficient addition will fail to form an effective protective slag layer, hindering its function; excessive addition will increase production costs and may cause the protective slag to be entrained in the molten steel, forming inclusion defects.

[0003] In existing technologies, the addition of protective slag is mostly done manually or by simple mechanical methods. Manual addition relies on the operator's experience, making it difficult to achieve precise quantitative addition. Furthermore, the protective slag is easily scattered during the addition process, polluting the environment and wasting it. It also cannot guarantee uniform coverage of the protective slag on the molten steel surface. While simple mechanical methods can replace manual addition to some extent, they have several drawbacks:

[0004] 1. The quantitative adjustment is not flexible, and it is mostly fixed volume feeding, which cannot adjust the feeding amount in real time according to process parameters such as the height of molten steel and the casting speed of billet;

[0005] 2. During the feeding process, the protective slag is prone to stagnation or nodule formation in the discharge pipe. Especially under the thermal radiation of high-temperature molten steel, the temperature of the inner wall of the discharge pipe rises, and the protective slag is easily heated and adhered, blocking the discharge channel and affecting the continuity of feeding.

[0006] 3. After the protective slag is added, it mainly relies on its own gravity to fall and cover the surface of the molten steel. The coverage area is limited and the uniformity is poor, which can easily lead to local accumulation or exposed areas. Summary of the Invention

[0007] The purpose of this invention is to solve the shortcomings of existing protective slag addition, easy nodule formation when the discharge pipe is heated, and uneven protective slag coverage, and to propose a protective slag quantitative addition component, continuous casting equipment and method thereof.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A component for quantitatively adding protective slag includes a base, on the top of which a column is fixed.

[0010] The outer wall of the column is fixed with a bearing platform I and a bearing platform II. The bearing platform I is located above the bearing platform II. The top of the bearing platform I is fixed with an intermediate ladle. The top of the base is fixed with a bearing platform III. Above the bearing platform III are multiple crystallizers located below the bearing platform I, which are used to receive the molten steel discharged from the intermediate ladle.

[0011] It also includes a feeding unit for feeding protective slag into the crystallizer. The feeding unit includes multiple material boxes fixed to the bottom of the support platform I, and multiple rotating drums.

[0012] It also includes a vibration unit for driving the crystallizer to vibrate. The vibration unit includes a support frame and a vibration motor. The support frame is fixedly connected to a plurality of crystallizers.

[0013] In one possible design, the dispensing unit further includes:

[0014] Multiple rotating chambers are respectively disposed on the bottom inner wall of the corresponding material box, and multiple rotating drums are respectively rotatably connected to the corresponding rotating chambers;

[0015] A drive shaft passes through multiple material bins, and multiple rotating drums are slidably connected to the outer wall of the drive shaft through the cooperation of sliding grooves and sliding blocks;

[0016] Multiple unloading troughs are respectively disposed on the outer wall of multiple rotating drums, and piston plates are slidably connected in each of the multiple unloading troughs, forming an effective receiving chamber with the piston plates and the unloading troughs;

[0017] Multiple slide rods I are respectively fixed to one side of the multiple piston plates near the drive shaft;

[0018] Motor I is fixed to the top of the support platform II;

[0019] The transmission rod is fixed to the output shaft of motor I;

[0020] Bevel gear II is fixed to the top of the transmission rod;

[0021] Bevel gear I is rotatably connected to one of the material boxes and is slidably sleeved on the outer wall of the transmission shaft through the cooperation of a sliding groove and a sliding block, and meshes with bevel gear II;

[0022] The motor I drives the transmission shaft to rotate through the bevel gear I and the bevel gear II. The transmission shaft drives the drum to rotate. When the unloading chute rotates to the upper position, the protective slag in the material box falls into the effective holding chamber. When the unloading chute rotates to the lower position, the protective slag is discharged.

[0023] In one possible design, an adjustment unit is also included, the adjustment unit comprising:

[0024] Multiple circular grooves are respectively disposed inside the corresponding rotating drum;

[0025] Multiple cones are fixedly sleeved on the outer wall of the drive shaft and slidably disposed in the corresponding circular grooves. The outer walls of the multiple cones are provided with multiple sliding grooves.

[0026] Multiple slide rods II are slidably connected in multiple slide grooves, and are fixedly connected to the end of the corresponding slide rod I near the drive shaft;

[0027] An electric push rod is fixed to the bottom of the corresponding material box, and its output shaft is rotatably connected to one end of the transmission shaft;

[0028] The electric push rod drives the transmission shaft to move axially, which in turn drives the truncated cone to move synchronously. Through the cooperation of the slide groove and the slide rod II, the slide rod I and the piston plate are driven to rise and fall, so as to adjust the volume of the effective accommodating compartment.

[0029] In one possible design, both ends of the truncated cone are fixed with carriages, and both carriages are slidably connected within the circular groove.

[0030] In one possible design, the vibrating element further includes:

[0031] Multiple guide rods are fixed to the top of the support platform III;

[0032] Multiple springs are respectively sleeved on the outer wall of multiple guide rods, with their top ends fixedly connected to the bottom of the support frame and their bottom ends fixedly connected to the top of the support platform III;

[0033] The support frame is slidably sleeved on the outer wall of the plurality of guide rods, and the vibration motor is fixed to one side of the support frame.

[0034] In one possible design, the bottom inner wall of the rotating chamber is provided with a material collection trough, which corresponds to the position of the discharge trough. The bottom of the material collection trough is connected to a manifold, and the bottom of the manifold is fixed with a plurality of curved discharge pipes, the bottom end of which extends to the top of the crystallizer.

[0035] In one possible design, a protective tube is fixedly fitted onto the outer wall of the curved discharge pipe. An air injection pipe is fixed to one end of the protective tube, and a conical ring I and a conical ring II are fixed to the bottom end of the protective tube. The top inner diameter of the conical ring I is larger than the bottom inner diameter, and the top inner diameter of the conical ring II is smaller than the bottom inner diameter. The conical ring I and the conical ring II form a Venturi tube, and the bottom end of the curved discharge pipe extends to the throat of the Venturi tube.

[0036] A continuous casting equipment, including the above-mentioned mold flux quantitative addition component, further includes:

[0037] A rotary table is rotatably connected to the top of the column, and mounting slots are provided on both sides of it;

[0038] The steel ladle is housed within the aforementioned placement slot;

[0039] A drive unit is used to drive the rotary table to rotate.

[0040] In one possible design, the drive unit includes:

[0041] A gear ring is fixed to the bottom of the rotary table and rotatably connected to the outer wall of the column;

[0042] A protective cover is fixedly fitted onto the outer wall of the column, and its top is rotatably connected to the bottom of the rotary table.

[0043] Multiple spur gears are rotatably connected inside the protective cover and mesh with the gear ring;

[0044] Multiple motors II are fixed to the bottom of the protective cover, and their output shafts are fixedly connected to the corresponding spur gears.

[0045] This application discloses a method for producing a continuous casting equipment, comprising the following steps:

[0046] S1. Molten steel in the smelting furnace is poured into a ladle. The ladle is then moved to the placement slot in the rotary table by a gantry crane. The ladle is placed on the rotary table by the protrusions on both sides. Then, motor II drives the spur gear to rotate. The spur gear meshes with the gear ring to turn the rotary table so that the ladle containing molten steel is placed above the tundish. Then, the valve at the bottom of the ladle is opened to discharge the molten steel into the tundish for storage. The tundish is used as a buffer container for molten steel from the ladle to the crystallizer.

[0047] S2. Next, open the valve at the bottom of the tundish and inject molten steel into the crystallizer. When the molten steel level in the crystallizer reaches the specified height, start the vibration motor. The vibration motor drives the support frame and the crystallizer to perform vertical periodic movements on the guide rod, which effectively prevents the solidified billet shell from sticking to the crystallizer and promotes the flow of liquid slag into the gap between the billet shell and the crystallizer wall to form a uniform slag film. In addition, the vibration process helps to protect the slag from evenly covering the molten steel surface and promotes the flow of liquid slag into the gap between the billet shell and the crystallizer wall.

[0048] S3. When adding protective slag, motor I drives bevel gear II to rotate through transmission rod. The meshing between bevel gear II and bevel gear I drives the transmission shaft to rotate, which in turn drives the drum to rotate. As the drum rotates in the rotating chamber, when the unloading chute rotates to the top, the protective slag in the material box falls into the unloading chute. Then, as the drum rotates, the protective slag in the unloading chute can be discharged into the crystallizer through the curved discharge pipe. In addition, the extension and retraction of the output shaft of the electric push rod can drive the transmission shaft to move. The transmission shaft drives the cone to move synchronously. The sliding groove on the cone slides with the sliding rod II. Therefore, as the cone moves, the sliding rod I and the piston plate can be raised and lowered, thereby adjusting the effective volume in the unloading chute and realizing mechanical quantitative adjustment.

[0049] S4. When the protective slag is discharged onto the molten steel in the crystallizer through the curved discharge pipe, low-temperature, high-pressure inert gas is injected into the protective pipe through the gas injection pipe. The inner diameter of the bottom of the conical ring I at the bottom of the protective pipe is smaller than the inner diameter of the top. Therefore, when the gas passes through the conical ring I, the high-pressure gas is ejected at high speed from the bottom of the conical ring I, forming an "inverted conical gas curtain" that envelops the falling protective slag powder flow. The high-speed airflow not only physically isolates the heat radiation from the surface of the molten steel to the inside of the curved discharge pipe, causing the curved discharge pipe to contract (preventing the pipe from contracting). (Nodule formation) and also utilize the diffusion properties of airflow to evenly disperse the protective slag into a mist, covering a wider liquid surface. In addition, in the conical ring II at the bottom of conical ring I, the inner diameter of the top of conical ring II is smaller than the inner diameter of the bottom. Therefore, conical ring II and conical ring I form a Venturi tube. The bottom end of the curved discharge pipe extends to the throat of the Venturi tube. Therefore, when the gas passes through the Venturi tube, a negative pressure is formed in the curved discharge pipe, which is used to discharge the protective slag in the curved discharge pipe from the curved discharge pipe, avoiding the protective slag discharged from the material box from remaining in the curved discharge pipe.

[0050] Beneficial effects: In this invention, the electric push rod drives the transmission shaft to move the cone, and with the cooperation of slide rod II and slide groove, it pushes slide rod I and piston plate up and down, realizing continuous adjustment of the effective storage capacity. At the same time, the motor I drives the drum to rotate at a constant speed, realizing the cyclic quantitative addition of protective slag. It can adjust the amount of protective slag added in real time according to process parameters such as billet casting speed and molten steel level. The addition error is small, which solves the problem of inaccurate addition of protective slag in the prior art. The accurate addition amount can ensure that a protective slag layer of uniform thickness is formed on the molten steel surface, effectively isolating air, preventing secondary oxidation of molten steel, absorbing inclusions in molten steel, reducing inclusion defects in billet, and improving the surface quality and internal performance of billet.

[0051] In this invention, low-temperature inert gas is injected into the protective pipe through the gas injection pipe to cool the curved discharge pipe, preventing the protective slag from sticking and forming inside the pipe due to the thermal radiation of high-temperature molten steel. At the same time, the Venturi tube structure formed by conical ring I and conical ring II creates negative pressure when the gas passes through at high speed, which can suck out the protective slag trapped in the curved discharge pipe and prevent the discharge pipe from being blocked. In addition, the material collection trough at the bottom of the rotating chamber can smoothly collect the protective slag discharged from the unloading trough into the manifold, preventing the protective slag from accumulating in the rotating chamber. The above structures work together to ensure the continuity of protective slag delivery, reduce production interruptions caused by discharge pipe blockage, and improve production efficiency.

[0052] In this invention, a vibrating motor drives the support frame and the crystallizer to vibrate up and down, causing slight fluctuations on the surface of the molten steel. This promotes the uniform diffusion of the protective slag and avoids local accumulation or exposed areas. At the same time, the high-speed inert gas ejected from the bottom of the protective pipe forms an inverted cone-shaped air curtain, which disperses the protective slag into a mist, expanding the coverage area of ​​the protective slag and further improving the uniformity of coverage. The uniform coverage of the protective slag ensures that the surface of the molten steel is protected in all directions.

[0053] In this invention, mechanical quantitative adjustment is achieved through the adjustment unit to meet the needs of different working conditions, ensuring uniform addition. The vibration unit causes the crystallizer to vibrate, which, together with the curved discharge pipe, protective pipe, and conical ring I, allows the protective slag to evenly cover the molten steel surface, forming a uniform slag film and effectively preventing slag nodule formation. The protective pipe and conical ring I utilize a gas curtain to isolate heat radiation, avoiding nodule formation inside the pipe, thereby improving continuous casting production efficiency and billet quality, reducing manual operation, lowering the defect rate, and providing reliable assurance for continuous casting production. Attached Figure Description

[0054] Figure 1 A three-dimensional structural schematic diagram of a protective slag quantitative addition component provided by the present invention;

[0055] Figure 2 A three-dimensional exploded structural diagram of support platform I, support platform II, and support platform III of a protective slag quantitative addition component provided by the present invention;

[0056] Figure 3 A three-dimensional exploded structural diagram of the guide rod, crystallizer, and support platform III of a protective slag quantitative addition component provided by the present invention;

[0057] Figure 4 A three-dimensional structural diagram of the feed box and manifold of a protective slag quantitative addition component provided by the present invention;

[0058] Figure 5 A three-dimensional cross-sectional view of the feed box and drum of a protective slag quantitative addition component provided by the present invention;

[0059] Figure 6A three-dimensional cross-sectional view of the rotating drum of a protective slag quantitative addition component provided by the present invention;

[0060] Figure 7 A three-dimensional exploded structural diagram of the frustum, slide, and slide rod I of a protective slag quantitative addition component provided by the present invention;

[0061] Figure 8 A three-dimensional structural schematic diagram of the curved discharge pipe and protective pipe of a protective slag quantitative addition component provided by the present invention;

[0062] Figure 9 A cross-sectional view of the conical ring I and conical ring II of a protective slag quantitative addition component provided by the present invention;

[0063] Figure 10 A three-dimensional structural schematic diagram of a continuous casting equipment provided by the present invention;

[0064] Figure 11 This is a three-dimensional exploded structural diagram of the gear ring and spur gear of a continuous casting equipment provided by the present invention.

[0065] In the diagram: 1. Base; 2. Column; 3. Support platform I; 4. Tundish; 5. Material box; 6. Rotary chamber; 7. Drum; 8. Drive shaft; 9. Electric push rod; 10. Discharge chute; 11. Piston plate; 12. Slide rod I; 13. Circular groove; 14. Frustum; 15. Carriage; 16. Slide groove; 17. Slide rod II; 18. Bevel gear I; 19. Bevel gear II; 20. Drive rod; 21. Motor I; 22. Collection chute; 23. Manifold ; 24. Curved discharge pipe; 25. Protective pipe; 26. Support rod; 27. Air injection pipe; 28. Conical ring I; 29. ​​Conical ring II; 30. Support platform III; 31. Support platform II; 32. Guide rod; 33. Support frame; 34. Spring; 35. Vibration motor; 36. Crystallizer; 37. Rotary table; 38. Placement slot; 39. Arc baffle; 40. Gear ring; 41. Spur gear; 42. Protective cover; 43. Motor II; 44. Steel ladle. Detailed Implementation

[0066] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0067] In one embodiment: Refer to Figures 1-9A component for quantitative addition of protective slag, relating to the field of continuous casting technology, mainly includes a base 1, a column 2, a support platform I 3, a support platform II 31, a support platform III 30, a tundish 4, a crystallizer 36, a feeding section, and a vibration section. The base 1 serves as the foundation of the entire device, providing stable support. The column 2 is fixed to the top of the base 1, and the column 2 is perpendicular to the surface of the base 1, providing support for the installation of other components. The support platforms I 3 and II 31 are fixed to the outer wall of the column 2, with the support platform I 3 located above the support platform II 31. The tundish 4 is fixed to the top of the support platform I 3, which is used to store molten steel discharged from the ladle 44. The support platform III 30 is fixed to the top of the base 1, and multiple crystallizers 36 located below the support platforms I 3 are provided above it. The crystallizers 36 are used to receive the molten steel discharged from the tundish 4, allowing the molten steel to gradually solidify in the crystallizers 36 to form a billet.

[0068] Reference Figure 2 and Figures 4-6 The feeding section is used to add protective slag into the crystallizer 36 after the molten steel discharged from the tundish 4 reaches a certain liquid level. The feeding section includes multiple material boxes 5 fixed to the bottom of the support platform I3. Each material box 5 has a rotating chamber 6 on its bottom inner wall. Multiple rotating drums 7 rotate in their respective rotating chambers 6. The same drive shaft 8 runs through the multiple material boxes 5. The multiple rotating drums 7 slide on the outer wall of the drive shaft 8 through sliding grooves and sliding blocks, ensuring that the rotating drums 7 can rotate with the rotation of the drive shaft 8, while also having a certain amount of sliding relative to the drive shaft 8. Each rotating drum 7 has a discharge device on its outer wall. The material trough 10 and the unloading trough 10 are slidably connected to a piston plate 11. The piston plate 11 and the unloading trough 10 form an effective holding bin for quantitative storage of protective slag to be discharged. The piston plate 11 is fixed with a sliding rod I 12 on the side near the transmission shaft 8. The top of the bearing platform II 31 is fixed with a motor I 21. The output shaft of the motor I 21 is fixed with a transmission rod 20. The top of the transmission rod 20 is fixed with a bevel gear II 19. A bevel gear I 18 meshes with one side of the bevel gear II 19. The bevel gear I 18 is rotatably connected to one of the material boxes 5, and the bevel gear I 18 is slidably sleeved on the outer wall of the transmission shaft 8 through a sliding groove and a sliding block.

[0069] Specifically, motor I21 drives bevel gear II19 to rotate via transmission rod 20. The meshing between bevel gear II19 and bevel gear I18 drives transmission shaft 8 to rotate. Transmission shaft 8 drives drum 7 to rotate. As drum 7 rotates in rotating chamber 6, when unloading trough 10 rotates to the top, protective slag in material box 5 falls into unloading trough 10. Then, as drum 7 rotates, protective slag in unloading trough 10 can be discharged into crystallizer 36 through curved discharge pipe 24.

[0070] Reference Figure 2 , Figure 8 and Figure 9Multiple material bins 5 are all fixedly connected to manifolds 23 through pipes at their bottoms. Multiple curved discharge pipes 24 are fixedly attached to the bottoms of the multiple manifolds 23. The curved discharge pipes 24 are Z-shaped, with both ends arranged vertically and the middle section arranged at an angle. This structure allows the protective slag to be discharged along the middle section. The bottom end of the curved discharge pipes 24 extends to the top of the crystallizer 36 to discharge the protective slag into the crystallizer 36.

[0071] Reference Figure 5 and Figure 6 To adjust the volume of the effective holding chamber by lifting and lowering the piston plate 11, the material box 5 is equipped with an adjustment part. The adjustment part includes multiple circular grooves 13 set in the corresponding drums 7. Each circular groove 13 has a slidable truncated cone 14. The multiple truncated cones 14 are fixedly sleeved on the outer wall of the drive shaft 8. The outer wall of the truncated cones 14 has multiple sliding grooves 16. Sliding rods II 17 are slidably connected in the sliding grooves 16. The ends of multiple sliding rods I 12 in the same drum 7 near the drive shaft 8 all slide into the corresponding circular grooves 13, and the ends of multiple sliding rods I 12 near the drive shaft 8 are fixedly connected to the ends of the corresponding sliding rods II 17 away from the truncated cones 14. One end of the drive shaft 8 is equipped with an electric push rod 9, which is fixed to the bottom of the corresponding material box 5. The output shaft of the electric push rod 9 is rotatably connected to one end of the drive shaft 8.

[0072] Specifically, the extension and retraction of the output shaft of the electric push rod 9 can drive the transmission shaft 8 to move, and the transmission shaft 8 drives the cone 14 to move synchronously. The slide groove 16 on the cone 14 slides and engages with the slide rod II 17. Therefore, as the cone 14 moves, the slide rod I 12 and the piston plate 11 can be raised and lowered, thereby adjusting the effective volume in the unloading trough 10 and realizing mechanical quantitative adjustment.

[0073] Reference Figures 5-7 In order to support the circular trough 13, both ends of the cone 14 are fixed with slides 15. Both slides 15 slide in the circular trough 13. The bottom inner wall of the rotating chamber 6 is provided with a collection trough 22. The collection trough 22 cooperates with the unloading trough 10 to receive the protective slag discharged from the unloading trough 10. The bottom inner wall of the collection trough 22 cooperates with the pipe to discharge the protective slag in the collection trough 22 into the manifold 23.

[0074] Reference Figures 1-3The vibrating unit is used to drive the crystallizer 36 to vibrate when protective slag is added into the crystallizer 36, so that the protective slag evenly covers the surface of the molten steel. The vibrating unit includes a support frame 33 and a vibration motor 35. Multiple guide rods 32 are fixed on the top of the support platform Ⅲ 30. The support frame 33 is slidably sleeved on the outer wall of the multiple guide rods 32. The vibration motor 35 is fixed on one side of the support frame 33 through the frame. Springs 34 are sleeved on the outer wall of the multiple guide rods 32. The elastic coefficient of the springs 34 is in the range of 50-150 N / mm. The top of the multiple springs 34 is fixedly connected to the bottom of the support frame 33, and the bottom of the multiple springs 34 is fixedly connected to the top of the support platform Ⅲ 30.

[0075] Specifically, the vibration motor 35 is started, and the vibration motor 35 drives the support frame 33 and the crystallizer 36 to perform vertical periodic movements on the guide rod 32. Due to the presence of the spring 34, the vibration effect of the support frame 33 is enhanced, making the vibration more stable, effectively preventing the solidified billet shell from sticking to the crystallizer 36, and promoting the flow of liquid slag into the gap between the billet shell and the wall of the crystallizer 36 to form a uniform slag film. In addition, the vibration process helps to protect the slag from evenly covering the surface of the molten steel and promotes the flow of liquid slag into the gap between the billet shell and the wall of the crystallizer 36.

[0076] Reference Figure 10 and Figure 11 A continuous casting equipment, relating to the field of continuous casting technology, includes the aforementioned protective slag quantitative addition component, and further includes a rotary table 37 rotating at the top of a column 2. The rotary table 37 has placement grooves 38 on both sides for accommodating a ladle 44. Both sides of the ladle 44 are fixed with protrusions and protruding columns, with the protrusions located below the protruding columns. The protruding columns facilitate the transfer of the ladle 44 by a gantry crane. The protrusions are placed on the top of the rotary table 37, allowing the ladle 44 to be stably placed within the placement grooves 38. Two arc-shaped baffles 39 are fixed to the top of the rotary table 37, with the sides of the two arc-shaped baffles 39 facing away from each other respectively conforming to the outer wall of the corresponding ladle 44 to increase the stability of the ladle 44.

[0077] Reference Figure 10 and Figure 11 The continuous casting equipment also includes a drive unit for driving the rotary table 37 to rotate and transfer the ladle 44 containing molten steel to the top of the tundish 4. The drive unit includes a gear ring 40 that rotates on the outer wall of the column 2. The gear ring 40 is fixed to the bottom of the rotary table 37. A protective cover 42 is fixedly fitted on the outer wall of the column 2, and the top of the protective cover 42 is rotatably connected to the bottom of the rotary table 37. Multiple spur gears 41 are rotatably connected inside the protective cover 42, and the spur gears 41 mesh with the gear ring 40. Multiple motors II 43 are fixed to the bottom of the protective cover 42 through the frame. The output shafts of the multiple motors II 43 are fixedly connected to the corresponding spur gears 41. The protective cover 42 is used to protect the spur gears 41 and the gear ring 40.

[0078] Specifically, motor II 43 drives spur gear 41 to rotate, and spur gear 41 meshes with gear ring 40 to drive rotary table 37 to change direction, so that ladle 44 containing molten steel is placed above tundish 4, which facilitates the discharge of molten steel from ladle 44 into tundish 4 for storage.

[0079] In another embodiment: Refer to Figure 8 and Figure 9 A protective tube 25 is fixedly sleeved on the outer wall of the curved discharge pipe 24. An injection pipe 27 is fixed to one end of the protective tube 25 and is connected to an external inert gas source. The injection pipe 27 is used to inject low-temperature inert gas into the protective tube 25 through a compressed air pump. Multiple support rods 26 are fixed to the inner wall of the protective tube 25. The ends of the multiple support rods 26 that are close to each other are fixedly connected to the bottom outer wall of the curved discharge pipe 24, which is placed vertically. This is used to increase the stability between the curved discharge pipe 24 and the protective tube 25. A conical ring I 28 is fixed to the bottom end of the protective tube 25. The inner diameter of the top of the conical ring I 28 is larger than the inner diameter of the bottom. A conical ring II 29 is fixed to the bottom end of the conical ring I 28. The inner diameter of the top of the conical ring II 29 is smaller than the inner diameter of the bottom. The conical ring I 28 and the conical ring II 29 form a venturi tube. The bottom end of the curved discharge pipe 24 extends to the throat of the venturi tube.

[0080] Specifically, low-temperature, high-pressure inert gas is injected into the protective pipe 25 through the gas injection pipe 27. The inner diameter of the bottom of the conical ring I 28 at the bottom of the protective pipe 25 is smaller than the inner diameter of the top. Therefore, when the gas passes through the conical ring I 28, the high-pressure gas is ejected at high speed from the bottom of the conical ring I 28, forming an "inverted conical gas curtain" that envelops the falling protective slag powder flow. The high-speed airflow not only physically isolates the heat radiation from the surface of the molten steel to the inside of the curved discharge pipe 24, preventing the curved discharge pipe 24 from contracting and forming nodules inside the pipe, but also uses the diffusion property of the airflow to evenly disperse the protective slag into a mist, covering a wider liquid surface. Furthermore, in the conical ring II 29 at the bottom of the conical ring I 28, the inner diameter of the top of the conical ring II 29 is smaller than the inner diameter of the bottom. Therefore, the conical ring II 29 and the conical ring I 28 form a Venturi tube. The bottom end of the curved discharge pipe 24 extends to the throat of the Venturi tube. Therefore, when the gas passes through the Venturi tube, a negative pressure is formed in the curved discharge pipe 24, which is used to discharge the protective slag in the curved discharge pipe 24 and prevent the protective slag discharged from the material box 5 from being retained in the curved discharge pipe 24.

[0081] A method for producing a continuous casting equipment includes the following steps:

[0082] S1. Molten steel in the smelting furnace is poured into ladle 44. Ladle 44 is moved to placement slot 38 in rotary table 37 by gantry crane. The ladle 44 is placed on rotary table 37 by the protrusions on both sides of the ladle 44. Then, motor II 43 drives spur gear 41 to rotate. Spur gear 41 meshes with gear ring 40 to drive rotary table 37 to turn in the opposite direction, so that ladle 44 containing molten steel is placed above tundish 4. Then, the valve at the bottom of ladle 44 is opened to discharge molten steel into tundish 4 for storage. Tundish 4 is used as a buffer container for molten steel from ladle 44 to crystallizer 36.

[0083] S2. Next, open the valve at the bottom of the tundish 4 and inject molten steel into the crystallizer 36. When the molten steel level in the crystallizer 36 reaches the specified height, start the vibration motor 35. The vibration motor 35 drives the support frame 33 and the crystallizer 36 to perform vertical periodic movements on the guide rod 32. This effectively prevents the solidified billet shell from sticking to the crystallizer 36 and promotes the flow of liquid slag into the gap between the billet shell and the wall of the crystallizer 36, forming a uniform slag film. In addition, the vibration process helps to protect the slag from evenly covering the molten steel surface and promotes the flow of liquid slag into the gap between the billet shell and the wall of the crystallizer 36.

[0084] S3. When adding protective slag, motor I21 drives bevel gear II19 to rotate through transmission rod 20. The meshing between bevel gear II19 and bevel gear I18 drives transmission shaft 8 to rotate. Transmission shaft 8 drives drum 7 to rotate. As drum 7 rotates in rotating chamber 6, when unloading trough 10 rotates to the top, protective slag in material box 5 falls into unloading trough 10. Then, as drum 7 rotates, protective slag in unloading trough 10 can be discharged into crystallizer 36 through curved discharge pipe 24. In addition, the extension and retraction of output shaft of electric push rod 9 can drive transmission shaft 8 to move. Transmission shaft 8 drives cone 14 to move synchronously. Sliding groove 16 on cone 14 slides with sliding rod II17. Therefore, as cone 14 moves, sliding rod I12 and piston plate 11 can be raised and lowered, thereby adjusting the effective volume in unloading trough 10 and realizing mechanical quantitative adjustment.

[0085] S4. When the protective slag is discharged onto the molten steel in the crystallizer 36 through the curved discharge pipe 24, low-temperature, high-pressure inert gas is injected into the protective pipe 25 through the gas injection pipe 27. The inner diameter of the bottom of the conical ring I 28 at the bottom of the protective pipe 25 is smaller than the inner diameter of the top. Therefore, when the gas passes through the conical ring I 28, the high-pressure gas is ejected at high speed from the bottom of the conical ring I 28, forming an "inverted conical gas curtain" that envelops the falling protective slag powder. The high-speed airflow not only physically isolates the heat radiation from the surface of the molten steel to the inside of the curved discharge pipe 24, causing the curved discharge pipe 24 to contract (to prevent the pipe from contracting). (Nodule formation), and also utilizes the diffusion property of airflow to evenly disperse the protective slag into a mist, covering a wider liquid surface. In addition, in the conical ring II 29 at the bottom of the conical ring I 28, the inner diameter of the top of the conical ring II 29 is smaller than the inner diameter of the bottom. Therefore, the conical ring II 29 and the conical ring I 28 form a Venturi tube. The bottom end of the curved discharge pipe 24 extends to the throat of the Venturi tube. Therefore, when the gas passes through the Venturi tube, a negative pressure is formed in the curved discharge pipe 24, which is used to discharge the protective slag in the curved discharge pipe 24 from the curved discharge pipe 24, and to prevent the protective slag discharged from the material box 5 from being retained in the curved discharge pipe 24.

[0086] However, as is well known to those skilled in the art, the working principles and wiring methods of motor II 43, vibration motor 35, motor I 21 and electric push rod 9 are all conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0087] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0088] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A component for quantitative addition of protective slag, comprising a base (1), wherein a column (2) is fixed to the top of the base (1), characterized in that: The outer wall of the column (2) is fixed with a bearing platform I (3) and a bearing platform II (31). The bearing platform I (3) is located above the bearing platform II (31). The top of the bearing platform I (3) is fixed with a tundish (4). The top of the base (1) is fixed with a bearing platform III (30). Above the bearing platform III (30) are multiple crystallizers (36) located below the bearing platform I (3) for receiving molten steel discharged from the tundish (4). It also includes a feeding section for feeding protective slag into the crystallizer (36), the feeding section including multiple hoppers (5) fixed to the bottom of the support platform I (3) and multiple drums (7); It also includes a vibration unit for driving the crystallizer (36) to vibrate. The vibration unit includes a support frame (33) and a vibration motor (35). The support frame (33) is fixedly connected to a plurality of the crystallizers (36).

2. The protective slag quantitative addition component according to claim 1, characterized in that, The delivery unit also includes: Multiple rotating chambers (6) are respectively disposed on the bottom inner wall of the corresponding material box (5), and multiple rotating drums (7) are respectively rotatably connected to the corresponding rotating chambers (6); A drive shaft (8) passes through multiple material boxes (5), and multiple drums (7) are slidably connected to the outer wall of the drive shaft (8) through the cooperation of sliding grooves and sliding blocks; Multiple unloading troughs (10) are respectively disposed on the outer wall of multiple rotating drums (7), and piston plates (11) are slidably connected in each of the multiple unloading troughs (10), and the piston plates (11) and the unloading troughs (10) form an effective accommodating chamber; Multiple slide rods I (12) are respectively fixed to the side of multiple piston plates (11) near the drive shaft (8); Motor I (21) is fixed to the top of the support platform II (31); The transmission rod (20) is fixed to the output shaft of the motor I (21); Bevel gear II (19) is fixed to the top of the transmission rod (20); The bevel gear I (18) is rotatably connected to one of the material boxes (5), and is slidably sleeved on the outer wall of the transmission shaft (8) through the cooperation of the sliding groove and the sliding block, and meshes with the bevel gear II (19); The motor I (21) drives the transmission shaft (8) to rotate through the bevel gear I (18) and the bevel gear II (19). The transmission shaft (8) drives the drum (7) to rotate. When the unloading trough (10) rotates to the top, the protective slag in the material box (5) falls into the effective holding chamber. When the unloading trough (10) rotates to the bottom, the protective slag is discharged.

3. The protective slag quantitative addition component according to claim 2, characterized in that, It also includes an adjustment unit, which includes: Multiple circular grooves (13) are respectively disposed in the corresponding rotating drums (7); Multiple cones (14) are respectively fixedly sleeved on the outer wall of the transmission shaft (8) and slidably disposed in the corresponding circular groove (13). The outer walls of the multiple cones (14) are provided with multiple sliding grooves (16). Multiple slide rods II (17) are slidably connected in multiple slide grooves (16) respectively, and are fixedly connected to the end of the corresponding slide rod I (12) near the drive shaft (8); An electric push rod (9) is fixed to the bottom of the corresponding material box (5), and its output shaft is rotatably connected to one end of the transmission shaft (8); The electric push rod (9) drives the transmission shaft (8) to move axially, which in turn drives the cone (14) to move synchronously. Through the cooperation of the slide groove (16) and the slide rod II (17), the slide rod I (12) and the piston plate (11) are driven to rise and fall, so as to adjust the volume of the effective accommodating compartment.

4. The protective slag quantitative addition component according to claim 3, characterized in that, Both ends of the cone (14) are fixed with slides (15), and both slides (15) are slidably connected in the circular groove (13).

5. A protective slag quantitative addition component according to claim 4, characterized in that, The vibrating part also includes: Multiple guide rods (32) are fixed to the top of the support platform III (30); Multiple springs (34) are respectively sleeved on the outer wall of multiple guide rods (32), with their top ends fixedly connected to the bottom of the support frame (33) and their bottom ends fixedly connected to the top of the support platform III (30); The support frame (33) is slidably sleeved on the outer wall of the multiple guide rods (32), and the vibration motor (35) is fixed to one side of the support frame (33).

6. The protective slag quantitative addition component according to claim 5, characterized in that, The bottom inner wall of the rotating chamber (6) is provided with a material collection trough (22), which corresponds to the position of the discharge trough (10). The bottom of the material collection trough (22) is connected to the manifold (23). The bottom of the manifold (23) is fixed with a plurality of curved discharge pipes (24), and the bottom end of the curved discharge pipes (24) extends to the top of the crystallizer (36).

7. A protective slag quantitative addition component according to claim 6, characterized in that, The outer wall of the curved discharge pipe (24) is fixedly fitted with a protective pipe (25). One end of the protective pipe (25) is fixed with an air injection pipe (27). The bottom end of the protective pipe (25) is fixed with a conical ring I (28) and a conical ring II (29). The top inner diameter of the conical ring I (28) is larger than the bottom inner diameter, and the top inner diameter of the conical ring II (29) is smaller than the bottom inner diameter. The conical ring I (28) and the conical ring II (29) form a Venturi tube. The bottom end of the curved discharge pipe (24) extends to the throat of the Venturi tube.

8. A continuous casting equipment, comprising a protective slag metering addition component as described in claim 7, characterized in that, Also includes: A rotary table (37) is rotatably connected to the top of the column (2), and mounting slots (38) are provided on both sides of it. The steel ladle (44) is housed in the mounting slot (38); The drive unit is used to drive the rotary table (37) to rotate.

9. A continuous casting equipment according to claim 8, characterized in that, The drive unit includes: The gear ring (40) is fixed to the bottom of the rotary table (37) and rotatably connected to the outer wall of the column (2); The protective cover (42) is fixedly sleeved on the outer wall of the column (2), and its top is rotatably connected to the bottom of the rotary table (37); Multiple spur gears (41) are rotatably connected inside the protective cover (42) and mesh with the gear ring (40); Multiple motors II (43) are fixed to the bottom of the protective cover (42), and their output shafts are fixedly connected to the corresponding spur gears (41).

10. A method for producing a continuous casting equipment, applied to the continuous casting equipment described in claim 9, characterized in that, Includes the following steps: S1. The molten steel in the smelting furnace is poured into the ladle (44). The ladle (44) is moved to the placement slot (38) in the rotary table (37) by the gantry crane. The ladle (44) is placed on the rotary table (37) by the protrusions on both sides of the ladle (44). Then the motor II (43) drives the spur gear (41) to rotate. The spur gear (41) meshes with the gear ring (40) to drive the rotary table (37) to turn in the opposite direction, so that the ladle (44) containing molten steel is placed above the intermediate ladle (4). Then the valve at the bottom of the ladle (44) is opened to discharge the molten steel into the intermediate ladle (4) for storage. The intermediate ladle (4) is used as a buffer container for the molten steel from the ladle (44) to the crystallizer (36). S2. Next, open the valve at the bottom of the tundish (4) and inject molten steel into the crystallizer (36). When the molten steel level in the crystallizer (36) reaches the specified height, start the vibration motor (35). The vibration motor (35) drives the support frame (33) and the crystallizer (36) to perform vertical periodic movements on the guide rod (32), which effectively prevents the solidified billet shell from sticking to the crystallizer (36) and promotes the slag to flow into the gap between the billet shell and the crystallizer (36) wall to form a uniform slag film. In addition, during the vibration process, it helps to protect the slag from uniformly covering the molten steel surface and promotes the slag to flow into the gap between the billet shell and the crystallizer (36) wall. S3. When adding protective slag, motor I (21) drives bevel gear II (19) to rotate through transmission rod (20). The meshing between bevel gear II (19) and bevel gear I (18) drives transmission shaft (8) to rotate. Transmission shaft (8) drives drum (7) to rotate. As drum (7) rotates in rotating chamber (6), when unloading trough (10) rotates to the top, protective slag in material box (5) falls into unloading trough (10). Then, with the rotation of drum (7), the protective slag in unloading trough (10) can be discharged. The slag is discharged into the crystallizer (36) through the curved discharge pipe (24). In addition, the extension and retraction of the output shaft of the electric push rod (9) can drive the transmission shaft (8) to move. The transmission shaft (8) drives the cone (14) to move synchronously. The sliding groove (16) on the cone (14) slides and engages with the sliding rod II (17). Therefore, as the cone (14) moves, the sliding rod I (12) and the piston plate (11) can be controlled to rise and fall, thereby adjusting the effective volume in the discharge trough (10) and realizing mechanical quantitative adjustment. S4. When the protective slag is discharged onto the molten steel in the crystallizer (36) through the curved discharge pipe (24), high-pressure inert gas is injected into the protective pipe (25) through the gas injection pipe (27). The inner diameter of the bottom of the conical ring I (28) at the bottom of the protective pipe (25) is smaller than the inner diameter at the top. Therefore, when the gas passes through the conical ring I (28), the high-pressure gas is ejected at high speed from the bottom of the conical ring I (28), forming an "inverted cone-shaped gas curtain" that envelops the falling protective slag powder. The high-speed airflow not only physically isolates the heat radiation from the surface of the molten steel to the inside of the curved discharge pipe (24), causing the curved discharge pipe (24) to contract, but also utilizes... The protective slag is evenly dispersed into a mist by the diffusion of the airflow, covering a wider liquid surface. In addition, the inner diameter of the top of the conical ring II (29) at the bottom of the conical ring I (28) is smaller than the inner diameter of the bottom. Therefore, the conical ring II (29) and the conical ring I (28) form a Venturi tube. The bottom end of the curved discharge pipe (24) extends to the throat of the Venturi tube. Therefore, when the gas passes through the Venturi tube, a negative pressure is formed in the curved discharge pipe (24) to discharge the protective slag in the curved discharge pipe (24) from the curved discharge pipe (24) and avoid the protective slag discharged from the material box (5) from being stuck in the curved discharge pipe (24).

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