An eight-flow T-type tundish flow control device

Abstract

The present invention provides an eight-flow T-type tundish flow control device, comprising a V-shaped retaining wall, an intermediate retaining wall and a turbulence suppressor, wherein the V-shaped retaining wall and the intermediate retaining wall are located in the injection impact zone of the T-type tundish; the left and right retaining walls of the V-shaped retaining wall are symmetrically arranged along the center line of the tundish body, respectively, and the left and right retaining walls are respectively connected with the intermediate retaining wall to form an isosceles triangle structure, and are located on the inner side of the front wall of the injection impact zone of the tundish; the left and right sides of the V-shaped retaining wall are respectively provided with flow guide holes, the intermediate retaining wall is close to the injection impact zone, and a rectangular channel is arranged at the lower part of the intermediate retaining wall; the turbulence suppressor is located in the injection zone just below the long shroud of molten steel, and presents a top-open pentagonal structure. The present invention can suppress the turbulent kinetic energy of molten steel when entering the tundish, prevent molten steel from splashing when pouring, reduce the emulsification of the tundish covering agent, and improve the distribution of fluid streams, thereby improving the consistency of each stream and extending the residence time in the tundish.

Description

Technical Field

[0001] The invention relates to the technical field of tundishes, and in particular to a flow control device for an eight-flow T-type tundish. Background Art

[0002] With the rapid development of efficient continuous casting technology, the optimization of flow field in the tundish, which is a key reaction vessel in the process, has received more and more attention. Various flow control devices installed in the tundish are the main factors affecting the flow state of molten steel in the tundish.

[0003] The T-type continuous casting tundish is a typical structure. The flow control device currently designed and developed has played a great role in reducing the flow of molten steel in the tundish, promoting the floating of inclusions, avoiding secondary oxidation of molten steel and slag rolling, ensuring the cleanliness of molten steel and smooth continuous casting process, and improving the quality of ingots.

[0004] However, the existing T-type tundish flow control device still has deficiencies in preventing molten steel from splashing, avoiding emulsification of the tundish covering agent, distributing fluid streams to improve the consistency of each stream and extending the residence time of molten steel in the ladle. Summary of the invention

[0005] In view of the shortcomings in the prior art, the present invention provides a flow control device for an eight-stream T-type tundish. By optimizing the design of the V-shaped retaining wall, the middle retaining wall and the turbulence suppressor, especially the design of the retaining wall guide hole and the flow channel, the turbulent kinetic energy of the molten steel when entering the tundish is suppressed to a great extent, the splashing of the molten steel when pouring is prevented, the emulsification of the tundish covering agent is reduced, and the distribution of fluid streams is improved, thereby improving the consistency of each stream and extending the residence time in the tundish. The quality and production efficiency of continuous casting steel are significantly improved.

[0006] The present invention achieves the above technical objectives through the following technical means.

[0007] A flow control device for an eight-flow T-type tundish comprises a V-shaped retaining wall, a middle retaining wall and a turbulence suppressor, wherein the V-shaped retaining wall and the middle retaining wall are located in the injection impact zone of the T-type tundish; the left retaining wall and the right retaining wall of the V-shaped retaining wall are symmetrically arranged along the center line of the tundish body and seamlessly spliced, the left retaining wall and the right retaining wall are seamlessly connected with the middle retaining wall to form an isosceles triangle structure, and are located on the inner side of the front package wall in the injection impact zone of the tundish; the left retaining wall and the right retaining wall of the V-shaped retaining wall are respectively provided with guide holes, the middle retaining wall is close to the injection impact zone, and a rectangular channel is arranged at the lower part of the middle retaining wall; the turbulence suppressor is located in the injection zone just below the long shroud of molten steel, and is a pentagonal structure with an open top.

[0008] Furthermore, the V-shaped retaining wall and the middle retaining wall are arranged perpendicular to the bottom surface of the tundish, and the V-shaped retaining wall and the middle retaining wall are seamlessly connected to form a straight triangular prism cavity, and the horizontal cross-section of the straight triangular prism cavity is an isosceles triangle; the three vertical edges of the straight triangular prism intersect perpendicularly with the contour lines of the bottom of the inner cavity of the tundish.

[0009] Furthermore, the left and right retaining walls of the V-shaped retaining wall are both provided with upper and lower guide holes, and the guide holes are from the front to the back of the left retaining wall / right retaining wall, and the front of the left retaining wall / right retaining wall is the side where the molten steel flows in; the guide holes are inclined upward at an angle of 10-20° relative to the vertical line of the left retaining wall / right retaining wall; the guide holes of the left retaining wall are inclined to the left at an angle of 20-30° relative to the vertical line of the left retaining wall, and the guide holes of the right retaining wall are inclined to the right at an angle of 20-30° relative to the vertical line of the right retaining wall, so as to achieve reasonable distribution of fluid flow streams, improve the consistency of each flow and extend the residence time in the package.

[0010] Furthermore, the diversion holes of the left and right retaining walls of the V-shaped retaining wall are both cylindrical, and the apertures of the diversion holes are both 80-110 mm.

[0011] Furthermore, the left retaining wall / right retaining wall are respectively provided with an upper guide hole and a lower guide hole, the height from the inlet center of the upper guide hole to the bottom surface of the tundish is 500-600 mm, the height from the inlet center of the lower guide hole to the bottom surface of the tundish is 300-400 mm, the distance from the inlet center of the upper guide hole to the ridge line at the connection between the left retaining wall and the right retaining wall is 890-910 mm; the distance from the inlet center of the lower guide hole to the ridge line at the connection between the left retaining wall and the right retaining wall is 850-870 mm.

[0012] Furthermore, the height of the rectangular channel is 200-300 mm, and the width of the rectangular channel is 800-1000 mm.

[0013] Furthermore, the turbulence suppressor includes a base, side walls and a top edge, the five side walls are perpendicular to the base, and the five side walls and the base form a pentagonal hollow chamber; the hollow chamber is symmetrical along the center line of the tundish body; the upper ends of the five side walls are provided with top edges extending upwardly and obliquely toward the center line; the top edges on both sides of the center line intersect to form a "human" shaped ridge, the "human" shaped ridge has an inner pentagonal vertical opening and is connected to the hollow chamber. The turbulence suppressor performs preliminary flow distribution on the initial injection of molten steel.

[0014] Furthermore, the dihedral angle formed by the top edge of the "human"-shaped roof ridge has an angle range of 170°-175°.

[0015] Furthermore, the "human"-shaped roof ridge forms a turbulence suppressor inlet through an inner pentagonal vertical opening, and the projected cross-sectional area of ​​the turbulence suppressor inlet is 7-10 times the cross-sectional area of ​​the long water nozzle outlet, which effectively prevents splashing when molten steel is injected.

[0016] Furthermore, the base, side walls and top edge of the turbulence suppressor are an integrated structure.

[0017] The beneficial effects of the present invention are:

[0018] 1. The flow control device of the eight-flow T-type tundish of the present invention forms an isosceles triangle structure through the left retaining wall, the right retaining wall and the middle retaining wall, and is located on the inner side of the tundish wall in front of the injection impact zone, the middle retaining wall is close to the injection impact zone, and a rectangular channel is arranged at the lower part of the middle retaining wall; the turbulence suppressor is located in the injection zone just below the long shroud of molten steel, and is a top-open pentagonal structure, which can significantly avoid the splashing of molten steel during the initial injection and effectively reduce the turbulent kinetic energy in the injection impact zone.

[0019] 2. The flow control device of the eight-flow T-type tundish of the present invention can reasonably distribute the fluid streams by providing a turbulence suppressor with a top open pentagonal structure and special-angled flow guide holes on the left and right side retaining walls of the V-shaped retaining wall, thereby improving the consistency of each flow.

[0020] 3. The flow control device of the eight-flow T-type tundish of the present invention and the special angle and size of the flow guide holes on the left and right side retaining walls of the V-shaped retaining wall reduce the emulsification of the tundish covering agent and effectively avoid the formation of secondary inclusions.

[0021] 4. The flow control device of the eight-flow T-type tundish of the present invention can greatly prolong the residence time of molten steel in the tundish, improve the uniformity of molten steel, reduce gas inclusions, reduce the possibility of slag rolling, and improve the quality of steel and production efficiency; the flow control device is an integrated molding structure, with simple workmanship requirements, low cost, and convenient and reliable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a top view of the flow control device of the eight-flow T-type tundish described in the present invention.

[0024] Figure 2 for Figure 1 CC cross-sectional view.

[0025] Figure 3 It is a front view of the side wall of the V-shaped retaining wall described in the present invention.

[0026] Figure 4 This is a front view of the intermediate retaining wall described in the present invention.

[0027] Figure 5 This is a top view of the turbulence suppressor described in the present invention.

[0028] Figure 6 for Figure 5 DD cross-sectional view.

[0029] Figure 7 It is the velocity cloud diagram of the free liquid surface of the empty bag in the prior art.

[0030] Figure 8 It is a streamline diagram of molten steel in an empty ladle in the prior art.

[0031] Fig. 9 It is a velocity cloud diagram of the free liquid surface of the empty bag of the flow control device described in the present invention.

[0032] Fig.10 The figure is a streamline diagram of molten steel in an empty ladle of the flow control device described in the present invention.

[0033] In the figure:

[0034] 1-long water inlet; 2-turbulence suppressor; 2a-base; 2b-side wall; 2c-hollow chamber; 2d-top edge; 3-middle retaining wall; 3a-rectangular channel; 4-V-shaped retaining wall; 4a-guide hole; 4a-1-upper guide hole; 4a-2-lower guide hole; 5-water outlet of tundish. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figure 1 and Figure 2 As shown, the eight-flow T-type tundish flow control device of the present invention comprises a V-shaped retaining wall 4, an intermediate retaining wall 3 and a turbulence suppressor 2, wherein the V-shaped retaining wall 4 and the intermediate retaining wall 3 are located in the injection impact zone of the T-type tundish; the left retaining wall and the right retaining wall of the V-shaped retaining wall 4 are symmetrically arranged along the center line of the tundish body and seamlessly spliced, and the left retaining wall and the right retaining wall are seamlessly connected with the intermediate retaining wall 3 to form an isosceles triangle structure, and are located on the inner side of the front package wall of the injection impact zone of the tundish; the left retaining wall and the right retaining wall of the V-shaped retaining wall 4 are respectively provided with flow guide holes 4a, the intermediate retaining wall 3 is close to the injection impact zone, and a rectangular channel 3a is arranged at the lower part of the intermediate retaining wall 3; the turbulence suppressor 2 is located in the injection zone directly below the molten steel long nozzle 1, and is a top-open pentagonal structure. The connection between the V-shaped retaining wall 4 and the intermediate retaining wall 3 is sealed by refractory material to ensure the airtightness of the molten steel buffer area. The interior of the tundish on both sides of the T-shaped tundish is connected to the interior of the isosceles triangle structure through the guide holes 4a, and four tundish water outlets 5 are symmetrically arranged at the bottom of the tundish on both sides of the T-shaped tundish.

[0039] The V-shaped retaining wall 4 and the middle retaining wall 3 are both arranged perpendicular to the bottom surface of the tundish. The V-shaped retaining wall 4 and the middle retaining wall 3 are seamlessly connected to form a straight triangular prism cavity, and the horizontal cross-section of the straight triangular prism cavity is an isosceles triangle; the three vertical edges of the straight triangular prism intersect perpendicularly with the contour lines of the bottom of the inner cavity of the tundish.

[0040] like Figure 3 As shown, the left and right retaining walls of the V-shaped retaining wall 4 are both provided with upper and lower guide holes 4a, and the guide holes 4a extend from the front to the back of the left retaining wall / right retaining wall, and the front of the left retaining wall / right retaining wall is the side where the molten steel flows in; the guide holes 4a are inclined upward at an angle of 10-20° relative to the vertical line of the left retaining wall / right retaining wall; the guide holes 4a of the left retaining wall are inclined to the left at an angle of 20-30° relative to the vertical line of the left retaining wall, and the guide holes 4a of the right retaining wall are inclined to the right at an angle of 20-30° relative to the vertical line of the right retaining wall. The guide holes 4a of the left and right retaining walls of the V-shaped retaining wall 4 are both cylindrical, and the apertures of the guide holes 4a are both 80-110 mm.

[0041] like Figure 3 As shown, the left retaining wall / right retaining wall are respectively provided with an upper guide hole 4a-1 and a lower guide hole 4a-2, the height from the inlet center of the upper guide hole 4a-1 to the bottom surface of the tundish is 500-600 mm, the height from the inlet center of the lower guide hole 4a-2 to the bottom surface of the tundish is 300-400 mm, the distance from the inlet center of the upper guide hole 4a-1 to the ridgeline at the connection of the left retaining wall and the right retaining wall is 890-910 mm; the distance from the inlet center of the lower guide hole 4a-2 to the ridgeline at the connection of the left retaining wall and the right retaining wall is 850-870 mm.

[0042] like Figure 4 As shown, the intermediate retaining wall 3 is an isosceles trapezoidal wall device vertical to the bottom of the tundish, the rectangular channel 3a at the lower part of the wall has a height of 200-300 mm, and the width of the rectangular channel 3a is 800-1000 mm.

[0043] like Figure 5 and Figure 6As shown, the turbulence suppressor 2 comprises a base 2a, a side wall 2b and a top edge 2d, wherein the five side walls 2b are perpendicular to the base 2a, and the five side walls 2b and the base 2a enclose a pentagonal hollow chamber 2c; the hollow chamber 2c is symmetrical along the center line of the tundish body; the upper ends of the five side walls 2b are provided with top edges 2d extending upwardly and obliquely toward the center line; the top edges 2d located on both sides of the center line intersect to form a ridge in the shape of a "human", and the ridge in the shape of a "human" adopts an inner pentagonal vertical opening and is connected to the hollow chamber 2c. The dihedral angle formed by the top edge 2d in the shape of the "human" ridge is in the range of 170°-175°. The ridge in the shape of a "human" forms the inlet of the turbulence suppressor 2 through the inner pentagonal vertical opening, and the projected cross-sectional area of ​​the inlet of the turbulence suppressor 2 is 7-10 times the cross-sectional area of ​​the outlet of the long water nozzle 1. The base 2a, side wall 2b and top edge 2d of the turbulence suppressor 2 are an integrated structure.

[0044] The V-shaped retaining wall 4, the middle retaining wall 3 and the turbulence suppressor 2 are all made of refractory materials.

[0045] Example 1: The aperture of the upper guide hole 4a-1 on the left and right sides of the V-shaped retaining wall 4 is 84 mm, and the aperture of the lower guide hole 4a-2 is 84 mm. The upper guide hole 4a-1 is inclined upward at an angle of 10° relative to the vertical line of the left retaining wall / right retaining wall (hereinafter referred to as the inclination angle of the upper guide hole 4a-1 is 10°), and the lower guide hole 4a-2 is inclined upward at an angle of 10° relative to the vertical line of the left retaining wall / right retaining wall (hereinafter referred to as the inclination angle of the lower guide hole 4a-2 is 10°). The guide hole 4a of the left retaining wall is inclined to the left at an angle of 24° relative to the vertical line of the left retaining wall, and the guide hole 4a of the right retaining wall is inclined to the right at an angle of 24° relative to the vertical line of the right retaining wall. The statistical data of the implementation results show that the consistency of each flow is 91.66%, and the dead zone ratio is 27.69% combined with numerical simulation.

[0046] Example 2: Based on Example 1, the upper guide holes 4a-1 on the left and right sides of the V-shaped retaining wall 4 have a diameter of 108 mm, the lower guide holes 4a-2 have a diameter of 108 mm, and the other parameters are the same as Example 1. The statistical data of the implementation results show that the consistency of each flow is 92.16%, and the numerical simulation shows that the dead zone ratio is 23.22%.

[0047] Example 3: Based on Example 2, the inclination angle of the lower guide hole 4a-2 is 15°, and the other parameters are the same as Example 2. The statistical data of the implementation results show that the consistency of each flow is 86.27%, and the numerical simulation shows that the dead zone ratio is 26.91%.

[0048] The test results of the flow control device arrangement embodiment of the present invention and the comparative example under the parameter conditions are shown in Table 1. The comparative test results show that the flow control device arrangement embodiment of the present invention significantly improves the consistency of each flow and effectively reduces the dead zone ratio of the flow field in the package, which is beneficial to improving steel quality and production efficiency.

[0049] Table 1 Test results of the embodiments

[0050] Serial number Diameter of upper guide hole / mm Diameter of upper guide hole / mm Upper diversion hole inclination Lower diversion hole inclination Left guide hole angle Right diversion hole angle Consistency of each stream Dead zone ratio Example 1 84 84 10° 10° 24° 24° 91.66% 27.69% Example 2 108 108 10° 10° 24° 24° 92.16% 23.22% Example 3 108 108 10° 15° 24° 24° 86.27% 26.91%

[0051] Working principle of the present invention:

[0052] See also Figure 1 and Figure 2 As shown, the molten steel is injected into the tundish from the long water nozzle 1, first impacting the hollow chamber 2c of the turbulence suppressor 2, significantly reducing the turbulent kinetic energy, and then overflowing along the top edge 2d for preliminary fluid flow distribution.

[0053] See also Figure 1 and Figure 4 As shown, the molten steel then flows into the triangular injection buffer zone formed by the V-shaped retaining wall 4 and the middle retaining wall 3 through the lower rectangular channel 3a of the middle retaining wall 3, further reducing its turbulent kinetic energy, thereby reducing the possibility of slag entanglement, promoting the floating of inclusions, and improving the purity of the molten steel.

[0054] See also Figure 1 and Figure 3 As shown, the molten steel further gathers in the buffer zone and overflows from the guide holes 4a provided on the V-shaped retaining wall 4, and the fluid is further distributed to each outlet 5 to improve the consistency of each flow, prolong the residence time of the molten steel in the ladle, and significantly improve the production quality of steel.

[0055] The following is a finite element simulation analysis of the difference between the prior art tundish and the eight-flow T-type tundish equipped with a flow control device of the present invention:

[0056] The simulation results of the flow field and temperature field of the molten steel in the tundish of the prior art are as follows: Figure 7 and Figure 8 As shown. From the streamline diagram, it can be seen that the streamlines of the molten steel in the tundish of the prior art are chaotic. This flow state is not conducive to the development of piston flow. In addition, the streamlines of the first and second flows are too long, and the flow path of the molten steel is too long, which will cause uneven distribution of the molten steel with other flows, and the consistency of the flow characteristics of each flow in the tundish is poor. From the velocity cloud diagram of the free liquid surface of the tundish of the prior art, it can be seen that the maximum flow rate of the molten steel at the working liquid surface of the impact zone is about 0.2348738m / s. According to relevant literature, the flow rate of the molten steel at the working liquid surface of the tundish with similar structure is 0.08m / s, so it is relatively large.

[0057] like Fig. 9 and Fig.10As shown, the eight-flow T-type tundish of the present invention is equipped with a flow control device, a flow stabilizer and an optimized retaining wall patented solution, and the maximum molten steel flow rate at the free liquid surface of the tundish is 0.1169243 m / s, indicating that the optimization solution significantly improves the unevenness of the flow field, especially improves the liquid level fluctuation in the impact zone, improves the consistency of each flow, reduces the dead zone ratio, and greatly reduces the risk of slag rolling.

[0058] Through experiments and field trials, it was verified that the flow control device of the embodiment of the present invention, which includes a V-shaped retaining wall, an intermediate retaining wall and a turbulence suppressor, effectively suppressed the turbulent kinetic energy of the molten steel when entering the tundish, prevented the splashing of the molten steel when pouring, further reduced the emulsification of the tundish covering agent, improved the distribution of fluid streams, improved the consistency of each stream and the residence time in the ladle, and significantly improved the quality of continuous casting steel and production efficiency.

[0059] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0060] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An eight-flow T-type tundish flow control device, characterized in that: The invention comprises a V-shaped retaining wall (4), an intermediate retaining wall (3) and a turbulence suppressor (2), wherein the V-shaped retaining wall (4) and the intermediate retaining wall (3) are located in the injection impact zone of the T-shaped tundish; the left retaining wall and the right retaining wall of the V-shaped retaining wall (4) are symmetrically arranged along the center line of the tundish body and seamlessly spliced; the left retaining wall and the right retaining wall are seamlessly connected with the intermediate retaining wall (3) to form an isosceles triangle structure and are located on the inner side of the front wall of the tundish in the injection impact zone; the left retaining wall and the right retaining wall of the V-shaped retaining wall (4) are respectively provided with flow guide holes (4a); the intermediate retaining wall (3) is close to the injection impact zone, and a rectangular channel (3a) is provided at the lower part of the intermediate retaining wall (3); the turbulence suppressor (2) is located in the injection zone directly below the molten steel shroud (1) and is a pentagonal structure with an open top; The left retaining wall and the right retaining wall of the V-shaped retaining wall (4) are both provided with upper and lower guide holes (4a), the guide holes (4a) extending from the front to the back of the left retaining wall / right retaining wall, the front of the left retaining wall / right retaining wall being the side into which the molten steel flows; the guide holes (4a) are inclined upward at an angle of 10-20° relative to the vertical line of the left retaining wall / right retaining wall; the guide holes (4a) of the left retaining wall are inclined to the left at an angle of 20-30° relative to the vertical line of the left retaining wall, and the guide holes (4a) of the right retaining wall are inclined to the right at an angle of 20-30° relative to the vertical line of the right retaining wall; The left retaining wall / right retaining wall are respectively provided with an upper guide hole (4a-1) and a lower guide hole (4a-2); the height from the inlet center of the upper guide hole (4a-1) to the bottom surface of the tundish is 500-600 mm, the height from the inlet center of the lower guide hole (4a-2) to the bottom surface of the tundish is 300-400 mm, the distance from the inlet center of the upper guide hole (4a-1) to the ridgeline at the connection between the left retaining wall and the right retaining wall is 890-910 mm; the distance from the inlet center of the lower guide hole (4a-2) to the ridgeline at the connection between the left retaining wall and the right retaining wall is 850-870 mm; the inlet projection cross-sectional area of ​​the turbulence suppressor (2) is 7-10 times the outlet cross-sectional area of ​​the long shroud (1).

2. The eight-flow T-type tundish flow control device according to claim 1 is characterized in that: The V-shaped retaining wall (4) and the intermediate retaining wall (3) are both arranged perpendicular to the bottom surface of the tundish; the V-shaped retaining wall (4) and the intermediate retaining wall (3) are seamlessly connected to form a straight triangular prism cavity; the horizontal cross-section of the straight triangular prism cavity is an isosceles triangle; and the three vertical edges of the straight triangular prism respectively intersect perpendicularly with the contour line of the bottom of the inner cavity of the tundish.

3. The eight-flow T-type tundish flow control device according to claim 1 is characterized in that: The diversion holes (4a) of the left and right retaining walls of the V-shaped retaining wall (4) are both cylindrical, and the diameters of the diversion holes (4a) are both 80-110 mm.

4. The eight-flow T-type tundish flow control device according to claim 1, characterized in that: The height of the rectangular channel (3a) is 200-300 mm, and the width of the rectangular channel (3a) is 800-1000 mm.

5. The eight-flow T-type tundish flow control device according to claim 1, characterized in that: The turbulence suppressor (2) comprises a base (2a), side walls (2b) and a top edge (2d); the five side walls (2b) are perpendicular to the base (2a); the five side walls (2b) and the base (2a) enclose a pentagonal hollow chamber (2c); the hollow chamber (2c) is symmetrical along the center line of the tundish body; the top ends of the five side walls (2b) are provided with top edges (2d) extending upwardly and obliquely toward the center line; the top edges (2d) located on both sides of the center line intersect to form a ridge in the shape of a "human"; the ridge in the shape of a "human" has an inner pentagonal vertical opening and is connected to the hollow chamber (2c).

6. The eight-flow T-type tundish flow control device according to claim 5, characterized in that: The dihedral angle formed by the top edge (2d) of the "human" shaped roof has an angle range of 170°-175°.

7. The eight-flow T-type tundish flow control device according to claim 5, characterized in that: The "human"-shaped roof ridge forms the entrance of the turbulence suppressor (2) through the inner pentagonal vertical opening.

8. The eight-flow T-type tundish flow control device according to claim 5, characterized in that: The base (2a), side wall (2b) and top edge (2d) of the turbulence suppressor (2) are an integrated structure.

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