A multifunctional refining device for cast steel

Abstract

The present invention discloses a multifunctional refining device for cast steel, and relates to the technical field of cast steel. The present invention comprises a device body, wherein an upper cover is fixed on the top of the device body, a slag weir is fixed on one side of the interior of the device body, an impact plate is fixed on the bottom of the inner wall of the device body, and the impact plate is located between the slag weir and the inner wall of the device body, and a dephosphorization device is arranged on one side of the device body. The present invention increases the oxygen activity in the molten steel by setting the dephosphorization device, improves the oxidation rate of phosphorus in the molten steel, and helps to more effectively separate phosphorus-containing slag from the molten steel. At the same time, reducing gas (such as hydrogen and carbon monoxide) is blown into the device body 1 to reduce the oxides in the molten steel, and then alloying agents (such as chromium, nickel, vanadium, titanium, etc.) are added to the molten steel to adjust the chemical composition and properties of the steel, and complete the alloying of the molten steel.

Description

Technical Field

[0001] The invention relates to the technical field of cast steel, in particular to a multifunctional refining device for cast steel. Background Art

[0002] The cast steel refining device, namely the continuous casting tundish, is one of the key equipment in the steelmaking process. It uses inert gases (such as argon) to refine and degas the molten steel in a high temperature and high pressure environment, effectively improving the purity and uniformity of the steel. The interior of the tundish is usually constructed of high temperature and corrosion resistant refractory materials to ensure operational safety and molten steel quality. The continuous casting tundish plays a key role in modern steel production and directly affects the quality and performance of the final product.

[0003] The Chinese patent with patent announcement number CN218252881U discloses a continuous casting tundish, which relates to the field of steelmaking continuous casting technology, including a tundish body, a slag retaining wall and a guard plate are arranged on the tundish body, the slag retaining wall and the guard plate are sealed and connected, the slag retaining wall and the guard plate are both sealed and connected to the tundish body, the slag retaining wall, the guard plate and part of the tundish body form a steel liquid impact space, a slag overflow groove is provided on the guard plate, the slag retaining wall includes a baffle plate, the baffle plate has a plurality of arc-shaped transition zones, a plurality of steel flow holes are provided on the slag retaining wall, and the steel liquid in the impact space can flow out through each steel flow hole. The continuous casting tundish provided by the patent can increase the service life.

[0004] However, the current refining device has the following problems: when the refining device helps to remove inclusions and slag in the molten steel, the slag is not removed completely during the oxidation period, resulting in phosphorus returning from the slag to the molten steel, which increases the phosphorus content in the molten steel and affects the performance and quality of the steel. Therefore, we propose a multifunctional refining device for cast steel. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a multifunctional refining device for cast steel, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multifunctional refining device for cast steel, comprising a device body, an upper cover is fixed on the top of the device body, a slag weir is fixed on one side of the inner part of the device body, an impact plate is fixed on the bottom of the inner wall of the device body, and the impact plate is located between the slag weir and the inner wall of the device body, a dephosphorization device is arranged on one side of the device body, the dephosphorization device comprises an oxygen pump, a collecting pipe, three direct current pipes, a plurality of connecting pipes, a plurality of gas nozzle rings, and three vertical pipes, the oxygen pump is fixed to the outer wall of the device body through a bracket, the air inlet end of the oxygen pump is connected to an external oxygen tank, the collecting pipe is fixed on the top of the impact plate, and the collecting pipe and the air delivery end of the oxygen pump are connected through a pipe. The three direct-flow pipes are fixed on the side of the collecting pipe away from the oxygen pump, the three vertical pipes are fixed on the side of the direct-flow pipe away from the collecting pipe, a number of the air nozzle rings are evenly and equidistantly fixed on the side of the slag retaining weir close to the inner wall of the device body, and the air nozzle ring is located at the guide hole of the slag retaining weir, one end of a number of the connecting pipes are respectively fixed on the outer walls of the three vertical pipes, and the other ends of a number of the connecting pipes are respectively fixed on the outer walls of a number of air nozzle rings, a uniform device is arranged on the side of the slag retaining weir away from the inner wall of the device body, the oxygen supply pump draws oxygen from the external oxygen tank and transports it to the collecting pipe, the collecting pipe transports oxygen to the air nozzle ring through the direct-flow pipe, the vertical pipe and the connecting pipe for spraying, and the air nozzle of the air nozzle ring sprays oxygen into the molten steel guided by the guide hole of the slag retaining weir.

[0007] According to the above technical solution, the three vertical pipes are located on the side of the slag weir away from the inner wall of the device body, and there is a five-centimeter interval between the three vertical pipes and the slag weir, and the three vertical pipes are all facing the diversion holes of the slag weir. At the same time, since the vertical pipes are facing the diversion holes of the slag weir, the curved surface of the vertical pipes can help guide the flow of molten steel, so that the molten steel can pass through the diversion holes more smoothly and evenly.

[0008] The cam is an L-shaped column that is fixed to the top of the vertical tube in the middle, and the cam is provided with an annular inclined groove. The cam is fixed to the bottom of the cam, and the cam passes through the top of the vertical tube in the middle. The impeller is fixed to the bottom of the cam. The three cams are respectively slidably installed on one side of the three vertical tubes away from the slag retaining weir. The three concave plates are evenly and equidistantly fixed on one side of the three cams away from the slag retaining weir. One end of the L-shaped column is fixed on the top of the concave plate above, and the other end of the L-shaped column is slidably installed inside the annular inclined groove of the annular inclined groove column. When oxygen flows inside the vertical tube in the middle, the oxygen drives the impeller to drive the rotating rod to rotate, and the rotating rod drives the annular inclined groove column to rotate. The annular inclined groove of the annular inclined groove column drives the L-shaped column to drive the upper concave plate to move back and forth up and down, and the upper concave plate drives other concave plates to move back and forth up and down through the slide.

[0009] According to the above technical solution, the uniformity device also includes a plurality of articulated rods, a plurality of push columns, and a plurality of scraper rings. The articulated rods are respectively articulated at the outer walls of the three slides, one ends of the push columns are respectively articulated at the other ends of the articulated rods, and the scraper rings are respectively fixed at the other ends of the push columns. The scraper rings are respectively slidably installed inside the guide holes of the slag weir, and the air nozzle of the air nozzle ring is located on the movement trajectory of the scraper ring. At the same time, each time the concave plate above drives the slide to move downward, the slide drives one end of the articulated rod to move downward, and the articulated rod pushes the scraper ring through the push column to scrape the inner wall of the guide hole of the slag weir, and the scraper ring will move to the air nozzle of the air nozzle ring.

[0010] According to the above technical solution, a slag turning device is provided on the top of the impact plate, and the slag turning device includes a U-shaped rod, a hinged push rod, and a flap. One end of the U-shaped rod is fixed to the top of the upper concave plate, and the hinged push rod is hinged to the other end of the U-shaped rod. The flap is hinged to the end of the hinged push rod away from the U-shaped rod, and the flap is slidably installed on the top of the impact plate. When the upper concave plate moves up and down, the concave plate drives the U-shaped rod to move up and down, and the U-shaped rod pushes the hinged push rod to drive the flap to slide back and forth along the top of the impact plate.

[0011] According to the above technical solution, the slag turning device also includes a shaft, two rotating wheels, and a plurality of alloy blades. The shaft is rotatably installed on the side of the flap close to the inner wall of the device body through a bracket. The two rotating wheels are respectively fixed on the outer walls on both sides of the shaft. The plurality of alloy blades are evenly and equidistantly fixed on the outer wall of the shaft. The exteriors of the two rotating wheels are both rough surfaces, and the outer walls of the rotating wheels are in contact with the top of the impact plate. At the same time, the flap drives the rotating wheel to move through the shaft. Under the friction between the rotating wheel and the impact plate, the impact plate drives the rotating wheel to rotate, and the rotating wheel drives the alloy blades through the shaft to further stir the slag blocks at the impact plate.

[0012] The present invention provides a multifunctional refining device for cast steel, which has the following beneficial effects:

[0013] (1) The present invention provides a dephosphorization device so that the oxygen pump, the collecting pipe, the direct current pipe, the vertical pipe, and the connecting pipe cooperate to drive the gas nozzle of the gas nozzle ring to spray oxygen into the molten steel guided by the guide hole of the slag retaining weir. The injection of oxygen increases the oxygen activity in the molten steel and improves the oxidation rate of the phosphorus element in the molten steel, which helps to more effectively separate the phosphorus-containing slag from the molten steel. At the same time, because the vertical pipe is directly opposite to the guide hole of the slag retaining weir, the curved surface of the direct current pipe can help guide the flow of the molten steel, so that the molten steel passes through the guide hole more smoothly and evenly, thereby reducing the turbulence and violent flow impact generated when the molten steel flows through the slag retaining weir.

[0014] (2) The present invention arranges a uniform device so that the vertical pipe, impeller, rotating rod, annular inclined groove column, and L-shaped column rod cooperate to drive the concave plate to move back and forth up and down. The up and down movement of the concave plate can reduce the turbulence phenomenon of the molten steel at the guide hole of the slag retaining weir, thereby improving the stability of the flow of the molten steel; at the same time, the concave plate, slide plate, hinged rod, and push column cooperate to drive the scraper ring to scrape the inner wall of the guide hole of the slag retaining weir, so that the scraper ring can effectively remove the slag, inclusions and other solid particles in the guide hole of the slag retaining weir, and then keep the guide hole clean to prevent these impurities from blocking the hole, thereby ensuring the smooth outflow of the molten steel. At the same time, the scraper ring scrapes the air nozzle of the air nozzle ring. The scraping of the scraper ring can ensure the smooth flow of the air nozzle hole of the air nozzle ring, and prevent the air nozzle hole of the air nozzle ring from being blocked or the flow is uneven.

[0015] (3) The present invention provides a slag turning device so that the concave plate, U-shaped rod, and hinged push rod cooperate to drive the turning plate to turn over the slag blocks accumulated on the impact plate. Turning over the slag blocks helps to evenly distribute the slag blocks on the impact plate and prevent the slag blocks from accumulating too much in the impact plate area. This uniform distribution can improve the use effect of the impact plate. At the same time, the turning plate, shaft rod, rotating wheel, and impact plate cooperate to drive the alloy blades to further stir the slag blocks on the impact plate. Through stirring, the slag blocks will be more evenly dispersed, avoiding the formation of a thick slag layer in the impact plate area, thereby ensuring more effective subsequent slag removal and cleaning operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the present invention as a whole;

[0017] Figure 2 A schematic diagram of a partial cross section of the present invention;

[0018] Figure 3 It is a schematic diagram of the local structure of the present invention;

[0019] Figure 4 Schematic diagram of the phosphorus removal device of the present invention Figure 1 ;

[0020] Figure 5 Schematic diagram of the phosphorus removal device of the present invention Figure 2 ;

[0021] Figure 6 Schematic diagram of the uniform device of the present invention Figure 1 ;

[0022] Figure 7 For the present invention Figure 6 A schematic diagram of the structure at A;

[0023] Figure 8 Schematic diagram of the uniform device of the present invention Figure 2 ;

[0024] Fig. 9 It is a schematic diagram of the slag turning device of the present invention.

[0025] In the figure: 1. device body; 2. upper cover; 3. slag weir; 4. impact plate; 5. dephosphorization device; 51. oxygen pump; 52. collecting pipe; 53. direct current pipe; 54. connecting pipe; 55. air nozzle ring; 56. vertical pipe; 6. uniform device; 61. annular inclined groove column; 62. L-shaped column rod; 63. rotating rod; 64. impeller; 65. slide plate; 66. concave plate; 67. hinged rod; 68. push column; 69. scraper ring; 7. slag turning device; 71. U-shaped rod; 72. hinged push rod; 73. turning plate; 74. rotating wheel; 75. shaft rod; 76. alloy blade. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] See also Figure 1-Figure 9 , one embodiment of the present invention is: a multifunctional refining device for cast steel, comprising a device body 1, a top cover 2 is fixed on the top of the device body 1, a slag weir 3 is fixed on one side of the inside of the device body 1, an impact plate 4 is fixed on the bottom of the inner wall of the device body 1, and the impact plate 4 is located between the slag weir 3 and the inner wall of the device body 1, and a dephosphorization device 5 is arranged on one side of the device body 1, and the dephosphorization device 5 comprises an oxygen pump 51, a collection pipe 52, three direct current pipes 53, a plurality of connecting pipes 54, a plurality of gas nozzle rings 55, and three vertical pipes 56, the oxygen pump 51 is fixed to the outer wall of the device body 1 through a bracket, the air inlet end of the oxygen pump 51 is connected to an external oxygen tank, the collection pipe 52 is fixed on the top of the impact plate 4, and the collection pipe 52 is connected to the air delivery end of the oxygen pump 51 through a pipeline, and the three direct current pipes 53 are fixed on the collection pipe 52. The main pipe 52 is on the side away from the oxygen supply pump 51, three vertical pipes 56 are fixed on the side of the direct current pipe 53 away from the collecting pipe 52, and a number of air nozzle rings 55 are evenly and equidistantly fixed on the side of the slag weir 3 close to the inner wall of the device body 1, and the air nozzle rings 55 are located at the guide holes of the slag weir 3, one end of a number of connecting pipes 54 are respectively fixed on the outer walls of the three vertical pipes 56, and the other ends of a number of connecting pipes 54 are respectively fixed on the outer walls of a number of air nozzle rings 55, and a uniform device 6 is provided on the side of the slag weir 3 away from the inner wall of the device body 1. Through the arrangement of the above-mentioned structure, the air nozzle of the air nozzle ring 55 sprays oxygen into the molten steel guided by the guide holes of the slag weir 3. The injection of oxygen increases the oxygen activity in the molten steel, increases the oxidation rate of the phosphorus element in the molten steel, and helps to more effectively separate the phosphorus-containing slag from the molten steel.

[0028] The three vertical pipes 56 are located on the side of the slag weir 3 away from the inner wall of the device body 1. There is a five-centimeter interval between the three vertical pipes 56 and the slag weir 3, and the three vertical pipes 56 are all facing the guide holes of the slag weir 3. Through the arrangement of the above-mentioned structure, the curved surface of the vertical pipe 56 can help guide the flow of molten steel, so that the molten steel can pass through the guide holes more smoothly and evenly, thereby reducing the turbulence and violent flow impact generated by the molten steel when flowing through the slag weir 3.

[0029] The uniform device 6 includes an annular chute column 61, an L-shaped column rod 62, a rotating rod 63, an impeller 64, three slide plates 65, and three concave plates 66. The annular chute column 61 is rotatably mounted on the top of the middle vertical pipe 56, and an annular chute column 61 is provided with an annular chute on the outside. The rotating rod 63 is fixed to the bottom of the annular chute column 61, and the rotating rod 63 passes through the top of the middle vertical pipe 56. The impeller 64 is fixed to the bottom of the rotating rod 63. The three slide plates 65 are respectively slidably mounted on the three vertical pipes 56 away from the top. On one side of the slag weir 3, three concave plates 66 are evenly and equidistantly fixed on the side of the three slides 65 away from the slag weir 3, one end of the L-shaped column 62 is fixed on the top of the concave plate 66 above, and the other end of the L-shaped column 62 is slidably installed inside the annular chute of the annular chute column 61. Through the arrangement of the above structure, the concave plate 66 can move back and forth up and down. The up and down movement of the concave plate 66 can reduce the turbulence phenomenon of the molten steel at the guide hole of the slag weir 3, thereby improving the stability of the molten steel flow.

[0030] The uniform device 6 further includes a plurality of hinged rods 67, a plurality of push posts 68, and a plurality of scraper rings 69. The plurality of hinged rods 67 are respectively hinged at the outer walls of the three slides 65, one end of the plurality of push posts 68 is respectively hinged at the other end of the plurality of hinged rods 67, and the plurality of scraper rings 69 are respectively fixed at the other end of the plurality of push posts 68. The plurality of scraper rings 69 are respectively slidably mounted inside the guide holes of the slag retaining weir 3, and the air nozzle of the air nozzle ring 55 is located on the motion trajectory of the scraper ring 69. The scraper ring 69 is arranged so that it scrapes the inner wall of the guide hole of the slag retaining weir 3, so that the scraper ring 69 can effectively remove the slag, inclusions and other solid particles in the guide hole of the slag retaining weir 3, and then keep the guide hole clean to prevent these impurities from blocking the hole, thereby ensuring the smooth outflow of molten steel. At the same time, the scraper ring 69 scrapes the air nozzle of the air nozzle ring 55. The scraping of the scraper ring 69 can ensure the smooth flow of the air nozzle hole of the air nozzle ring 55, and prevent the air nozzle hole of the air nozzle ring 55 from being blocked or the flow is uneven.

[0031] When in use, the ladle injects molten steel into the device body 1, and the molten steel flows through the impact plate 4 and the slag weir 3. The slag weir 3 blocks the slag blocks mixed in the molten steel flowing down from the ladle, and the guide holes of the slag weir 3 guide the molten steel. During the process of the guide holes of the slag weir 3 guiding the molten steel, the oxygen supply pump 51 is started, and the oxygen supply pump 51 extracts oxygen from the external oxygen tank and transports it to the collection pipe 52. The collection pipe 52 transports the oxygen to the gas nozzle ring 55 through the direct current pipe 53, the vertical pipe 56 and the connecting pipe 54 for spraying. The gas nozzle of the gas nozzle ring 55 sprays oxygen into the molten steel guided by the guide holes of the slag weir 3. The injection of oxygen increases the oxygen activity in the molten steel. The oxidation rate of phosphorus in the molten steel is improved, which helps to more effectively separate the phosphorus-containing slag from the molten steel; at the same time, since the vertical pipe 56 is directly opposite to the guide hole of the slag weir 3, the curved surface of the vertical pipe 56 can help guide the flow of the molten steel, so that the molten steel can pass through the guide hole more smoothly and evenly, thereby reducing the turbulence and violent flow impact generated when the molten steel flows through the slag weir 3. At the same time, reducing gas (such as hydrogen and carbon monoxide) is blown into the device body 1 to reduce the oxides in the molten steel, and then alloying agents (such as chromium, nickel, vanadium, titanium, etc.) are added to the molten steel to adjust the chemical composition and properties of the steel and complete the alloying of the molten steel.

[0032] At the same time, when oxygen circulates inside the middle vertical pipe 56, the oxygen drives the impeller 64 to drive the rotating rod 63 to rotate, and the rotating rod 63 drives the annular inclined groove column 61 to rotate. The annular inclined groove of the annular inclined groove column 61 drives the L-shaped column rod 62 to drive the upper concave plate 66 to move up and down, and the upper concave plate 66 drives other concave plates 66 to move up and down through the slide plate 65. The up and down movement of the concave plate 66 can reduce the turbulence of the molten steel at the guide hole of the slag weir 3, thereby improving the stability of the flow of the molten steel; at the same time, each time the upper concave plate 66 drives the slide plate 65 to move downward, the slide plate 65 drives One end of the articulated rod 67 moves downward, and the articulated rod 67 pushes the scraper ring 69 through the push column 68 to scrape the inner wall of the guide hole of the slag retaining weir 3, so that the scraper ring 69 can effectively remove the slag, inclusions and other solid particles in the guide hole of the slag retaining weir 3, and then keep the guide hole clean to prevent these impurities from blocking the hole, thereby ensuring the smooth outflow of molten steel, and the scraper ring 69 will move to the air nozzle of the air nozzle ring 55, and the scraper ring 69 scrapes the air nozzle of the air nozzle ring 55. The scraping of the scraper ring 69 can ensure that the air nozzle hole of the air nozzle ring 55 is unobstructed, and prevent the air nozzle hole of the air nozzle ring 55 from being blocked or the flow is uneven.

[0033] See also Figure 1-Figure 9 Based on the above embodiment, in another embodiment of the present invention, a slag turning device 7 is provided on the top of the impact plate 4.

[0034] The slag turning device 7 includes a U-shaped rod 71, a hinged push rod 72, and a flap 73. One end of the U-shaped rod 71 is fixed to the top of the upper concave plate 66, the hinged push rod 72 is hinged to the other end of the U-shaped rod 71, the flap 73 is hinged to the end of the hinged push rod 72 away from the U-shaped rod 71, and the flap 73 is slidably installed on the top of the impact plate 4. Through the arrangement of the above structure, the flap 73 turns over the slag blocks accumulated at the impact plate 4. Turning over the slag blocks helps to evenly distribute the slag blocks at the impact plate 4 to prevent excessive accumulation of slag blocks in the impact plate 4 area. This uniform distribution can improve the use effect of the impact plate 4.

[0035] The slag turning device 7 also includes a shaft 75, two wheels 74, and a plurality of alloy blades 76. The shaft 75 is rotatably mounted on a side of the flap 73 close to the inner wall of the device body 1 through a bracket. The two wheels 74 are respectively fixed on the outer walls on both sides of the shaft 75. A plurality of alloy blades 76 are evenly and equidistantly fixed on the outer wall of the shaft 75. The exteriors of the two wheels 74 are both rough surfaces, and the outer walls of the wheels 74 are in contact with the top of the impact plate 4. Through the arrangement of the above structure, the wheels 74 drive the alloy blades 76 to further stir the slag blocks at the impact plate 4 through the shaft 75. Through stirring, the slag blocks will be more evenly dispersed, avoiding the formation of a thick slag layer in the impact plate 4 area, thereby ensuring more effective subsequent slag removal and cleaning operations.

[0036] When in use, when the upper concave plate 66 moves up and down, the concave plate 66 drives the U-shaped rod 71 to move up and down, and the U-shaped rod 71 pushes the hinged push rod 72 to drive the flap 73 to slide back and forth along the top of the impact plate 4, so that the flap 73 turns over the slag blocks accumulated on the impact plate 4, and turning over the slag blocks helps to evenly distribute the slag blocks on the impact plate 4 to prevent the slag blocks from accumulating too much in the impact plate 4 area. This uniform distribution can improve the use effect of the impact plate 4; at the same time, the flap 73 drives the rotating wheel 74 to move along through the shaft rod 75. Under the action of the friction between the rotating wheel 74 and the impact plate 4, the impact plate 4 drives the rotating wheel 74 to rotate, and the rotating wheel 74 drives the alloy blades 76 through the shaft rod 75 to further stir the slag blocks at the impact plate 4. Through stirring, the slag blocks will be more evenly dispersed, avoiding the formation of a thick slag layer in the impact plate 4 area, thereby ensuring subsequent more effective slag removal and cleaning operations.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multifunctional refining device for cast steel, comprising a device body (1), a top cover (2) being fixed on the top of the device body (1), a slag weir (3) being fixed on one side of the inside of the device body (1), an impact plate (4) being fixed on the bottom of the inner wall of the device body (1), and the impact plate (4) being located between the slag weir (3) and the inner wall of the device body (1); Features: A dephosphorization device (5) is provided on one side of the device body (1), and the dephosphorization device (5) comprises an oxygen pump (51), a collection pipe (52), three direct current pipes (53), a plurality of connecting pipes (54), a plurality of air nozzle rings (55), and three vertical pipes (56). The oxygen pump (51) is fixed to the outer wall of the device body (1) through a bracket, and the air inlet end of the oxygen pump (51) is connected to an external oxygen tank. The collection pipe (52) is fixed to the top of the impact plate (4), and the collection pipe (52) is connected to the air delivery end of the oxygen pump (51) through a pipeline. The three direct current pipes (53) are fixed to the collection pipe (52). ) on a side away from the oxygen delivery pump (51), the three vertical pipes (56) are fixed on a side of the direct current pipe (53) away from the collecting pipe (52), a plurality of the air nozzle rings (55) are evenly and equidistantly fixed on a side of the slag retaining weir (3) close to the inner wall of the device body (1), and the air nozzle rings (55) are located at the guide holes of the slag retaining weir (3), one end of a plurality of the connecting pipes (54) are respectively fixed on the outer walls of the three vertical pipes (56), and the other ends of a plurality of the connecting pipes (54) are respectively fixed on the outer walls of a plurality of the air nozzle rings (55), and a uniform device (6) is provided on a side of the slag retaining weir (3) away from the inner wall of the device body (1); The three vertical pipes (56) are located on a side of the slag retaining weir (3) away from the inner wall of the device body (1), and a five-centimeter interval is left between the three vertical pipes (56) and the slag retaining weir (3), and the three vertical pipes (56) are all facing the diversion hole of the slag retaining weir (3); The uniform device (6) comprises an annular chute column (61), an L-shaped column rod (62), a rotating rod (63), an impeller (64), three slide plates (65), and three concave plates (66). The annular chute column (61) is rotatably mounted on the top of the middle vertical pipe (56), and an annular chute is formed on the outside of the annular chute column (61). The rotating rod (63) is fixed to the bottom of the annular chute column (61), and the rotating rod (63) passes through the top of the middle vertical pipe (56). The impeller (64) is fixed to the bottom of the rotating rod (63), the three slide plates (65) are respectively slidably mounted on the side of the three vertical pipes (56) away from the slag retaining weir (3), the three concave plates (66) are evenly and equidistantly fixed on the side of the three slide plates (65) away from the slag retaining weir (3), one end of the L-shaped column (62) is fixed to the top of the upper concave plate (66), and the other end of the L-shaped column (62) is slidably mounted inside the annular chute of the annular chute column (61).

2. A multifunctional refining device for cast steel according to claim 1, characterized in that: The uniforming device (6) further comprises a plurality of hinged rods (67), a plurality of push columns (68), and a plurality of scraper rings (69). The plurality of hinged rods (67) are respectively hinged to the outer walls of the three slide plates (65), one end of the plurality of push columns (68) are respectively hinged to the other end of the plurality of hinged rods (67), and the plurality of scraper rings (69) are respectively fixed to the other end of the plurality of push columns (68).

3. A multifunctional refining device for cast steel according to claim 2, characterized in that: A plurality of scraper rings (69) are respectively slidably mounted inside the guide holes of the slag retaining weir (3), and the air nozzles of the air nozzle rings (55) are located on the movement tracks of the scraper rings (69).

4. A multifunctional refining device for cast steel according to claim 3, characterized in that: A slag turning device (7) is provided on the top of the impact plate (4), and the slag turning device (7) comprises a U-shaped rod (71), a hinged push rod (72), and a flap (73), one end of the U-shaped rod (71) is fixed to the top of the concave plate (66) above, the hinged push rod (72) is hinged to the other end of the U-shaped rod (71), the flap (73) is hinged to an end of the hinged push rod (72) away from the U-shaped rod (71), and the flap (73) is slidably mounted on the top of the impact plate (4).

5. A multifunctional refining device for cast steel according to claim 4, characterized in that: The slag turning device (7) further comprises a shaft (75), two rotating wheels (74), and a plurality of alloy blades (76); the shaft (75) is rotatably mounted on a side of the turning plate (73) close to the inner wall of the device body (1) via a bracket; the two rotating wheels (74) are respectively fixed to the outer walls on both sides of the shaft (75); and the plurality of alloy blades (76) are evenly and equidistantly fixed to the outer wall of the shaft (75).

6. A multifunctional refining device for cast steel according to claim 5, characterized in that: The exteriors of the two rotating wheels (74) are both provided with rough surfaces, and the outer walls of the rotating wheels (74) are in contact with the top of the impact plate (4).

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