Tundish and continuous casting system

Abstract

The invention discloses a tundish and a continuous casting system. The tundish comprises a tundish body; and the turbulent flow suppressor is arranged at the bottom of the tundish body and located below the long nozzle of the tundish body, the turbulent flow suppressor is a polyhedron with a hollow interior and an opening at the top and an edge, and the turbulent flow suppressor is used for reducing the flowing speed of molten steel flowing out of the long nozzle. The technical problem that the cleanliness of molten steel is low is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of continuous steel casting, and in particular relates to a tundish and a continuous casting system. Background Art

[0002] Tundish metallurgy is a special refining technology outside the furnace. It is a key link in the production process from steel smelting and refining to solid continuous casting billet to ensure the acquisition of high-quality steel. In the early stage of the development of continuous steel casting technology, the tundish was only used as a storage and distributor for molten steel. With the development of continuous casting technology, the importance of molten steel quality to the continuous casting process has gradually been recognized by people. The refining function of the tundish has attracted more and more attention from metallurgical workers, and the important functions of further removing inclusions in the tundish and preventing secondary pollution of molten steel have been paid more and more attention. In order to ensure the smooth continuous casting and multi-furnace continuous casting, the molten steel must have sufficient cleanliness, the composition of the molten steel must be controlled as accurately as possible to achieve homogenization, and the temperature of the molten steel must be kept stable for a sufficiently long time. Therefore, as the last refractory container in the steel smelting process, the metallurgical role of the tundish has received more and more attention.

[0003] When the molten steel flows into the tundish from the long water inlet, the velocity gradient of the molten steel in the injection area is very large. After the high-speed molten steel rushes to the bottom of the tundish, it directly reflects and flows to the molten steel surface and the nearby wall of the tundish, causing the molten steel surface of the tundish to be violently disturbed. Part of the tundish covering agent is drawn into the molten steel to form inclusions. At the same time, it is easy to be drawn into the air for secondary oxidation, resulting in low cleanliness of the molten steel, affecting the quality of the subsequent products. Therefore, the low cleanliness of the molten steel is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present invention provide a tundish and a continuous casting system, which solve the technical problem of low cleanliness of molten steel.

[0005] In the first aspect, an embodiment of the present invention provides a tundish, comprising: a tundish body; a turbulence suppressor, arranged at the bottom of the tundish body and below the long water outlet of the tundish body, the turbulence suppressor being a polyhedron with a hollow interior and an opening with an edge on the top, for reducing the flow velocity of the molten steel flowing out of the long water outlet.

[0006] In combination with the first aspect of the present invention, in some embodiments, the turbulence suppressor includes: a base; a side wall, one end of which is connected to the edge of the base, and the side wall extends upward from the base; and an upper edge, one end of which is connected to the other end of the side wall, and the upper edge extends toward the interior of the turbulence suppressor.

[0007] In combination with the first aspect of the present invention, in some embodiments, a hole is provided on the side wall, and an extension direction of the hole is parallel to the base.

[0008] In combination with the first aspect of the present invention, in some embodiments, a hole is provided on the side wall, and an angle between an extension direction of the hole and the base is within a preset first angle range.

[0009] In combination with the first aspect of the present invention, in some embodiments, the side wall comprises: a first portion of the side wall and a second portion of the side wall; wherein the inward extension length of the upper edge at the first portion of the side wall is greater than the inward extension length at the second portion of the side wall, and the distance between the first portion of the side wall and the steel outlet of the tundish body is less than the distance between the second portion of the side wall and the steel outlet of the tundish body.

[0010] In combination with the first aspect of the present invention, in some embodiments, the number of holes in each sidewall of the first portion of sidewalls is less than the number of holes in each sidewall of the second portion of sidewalls.

[0011] In combination with the first aspect of the present invention, in some embodiments, the tundish body comprises: a first steel outlet and a second steel outlet respectively arranged on both sides of the bottom of the tundish body, the outer shape of the tundish body is a rectangular parallelepiped, and the first steel outlet and the second steel outlet are respectively located in the vicinity of the two ends of the longer side of the tundish body.

[0012] In combination with the first aspect of the present invention, in some embodiments, the turbulence suppressor has an octagonal prism shape, the first portion of the side wall includes a first sub-side wall, a second sub-side wall, a third sub-side wall, a fourth sub-side wall, a fifth sub-side wall and a sixth sub-side wall, the second portion of the side wall includes a seventh sub-side wall and an eighth sub-side wall opposite to the seventh sub-side wall, the length of each side wall in the first portion of the side wall is the same, the length of each side wall in the second portion of the side wall is the same, the length of each side wall in the first portion of the side wall is less than the length of each side wall in the second portion of the side wall; each side wall in the second portion of the side wall is parallel to the longer side of the intermediate package body.

[0013] In combination with the first aspect of the present invention, in some embodiments, a rectangular hole is provided on the first sub-side wall, the second sub-side wall, the third sub-side wall, the fourth sub-side wall, the fifth sub-side wall and the sixth sub-side wall, and two rectangular holes are provided on the seventh sub-side wall and the eighth sub-side wall, and the length of the rectangular holes is 0.05m to 0.15m, and the width is 0.02m to 0.05m.

[0014] In a second aspect, an embodiment of the present invention provides a continuous casting system, comprising the tundish described in any one of the first aspects.

[0015] One or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0016] The tundish provided in the embodiment of the present invention includes: a tundish body; a turbulence suppressor, which is arranged at the bottom of the tundish body and below the long water outlet of the tundish body. The turbulence suppressor is a polyhedron with a hollow interior and an opening with an edge at the top, and is used to reduce the flow velocity of the molten steel flowing out of the long water outlet. When the molten steel flows into the tundish from the long water outlet of the tundish, the molten steel will flow into the interior of the turbulence suppressor. Since the top opening of the turbulence suppressor has an edge, the turbulence suppressor can effectively suppress the molten steel from reflecting and flowing to the molten steel surface and nearby wall of the tundish after colliding with the turbulence suppressor, and can reduce the flow velocity of the molten steel, thereby avoiding severe disturbance of the molten steel surface of the tundish, thereby avoiding part of the tundish covering agent from being drawn into the molten steel to form inclusions, and avoiding secondary oxidation caused by being drawn into the air. Therefore, the cleanliness of the molten steel is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of a tundish in an embodiment of the present invention;

[0019] Figure 2 is a global schematic diagram of a turbulence suppressor in an embodiment of the present invention;

[0020] Figure 3 is a cross-sectional schematic diagram of a turbulence suppressor in an embodiment of the present invention;

[0021] Figure 4 A comparison diagram of molten steel RTD curves corresponding to an existing turbulence suppressor and a turbulence suppressor according to an embodiment of the present invention;

[0022] Figure 5 It is a comparison chart of the inclusion removal rates of the existing turbulence suppressor and the turbulence suppressor according to the embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] Figure 1 Schematic diagram of a tundish in an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a tundish, comprising: a tundish body 10; a turbulence suppressor 20, which is arranged at the bottom of the tundish body 10 and below the long water nozzle 110 of the tundish body 10, and the turbulence suppressor 20 is a polyhedron with a hollow interior and an opening with an edge on the top, and is used to reduce the flow velocity of the molten steel flowing out of the long water nozzle 110.

[0026] refer to Figure 2 and Figure 3 As shown, Figure 2 is a global schematic diagram of the turbulence suppressor 20 in an embodiment of the present invention, Figure 3 Schematic cross-sectional view of the turbulence suppressor 20 in an embodiment of the present invention.

[0027] In some embodiments, the turbulence suppressor 20 may include: a base 210; a side wall 220, one end of which is connected to the edge of the base 210, and the side wall 220 extends toward the top of the base 210; and an upper edge 230, one end of which is connected to the other end of the side wall 220, and the upper edge 230 extends toward the interior of the turbulence suppressor 20.

[0028] It should be noted that the base 210 , the side wall 220 and the upper edge 230 may be made of refractory materials.

[0029] It should be noted that the angle between the base 210 and the side wall 220 is a first angle, which may be 0 to 180 degrees, such as 90 degrees. The angle between the upper edge 230 and the side wall 220 is a second angle, which may be 0 to 180 degrees, such as 90 degrees. The positional relationship between the upper edge 230 and the base 210 may be parallel or non-parallel, and the angle between the upper edge 230 and the base 210 may be in a preset second angle range, which may be 0 to 90 degrees.

[0030] It should be noted that, in the process of molten steel flowing into the tundish, the molten steel first flows out from the long water nozzle 110, and then enters the interior of the turbulence suppressor 20 from the top opening at the upper edge 230. Then, the molten steel collides with the base 210 of the turbulence suppressor 20 and reflects upward. Most of the molten steel reflected upward will be blocked by the upper edge 230, so the flow rate of the molten steel flowing out of the long water nozzle 110 is reduced, and the molten steel is effectively suppressed from flowing directly to the molten steel surface of the tundish, avoiding violent disturbance of the molten steel surface of the tundish, thereby avoiding part of the tundish covering agent from being drawn into the molten steel to form inclusions, and avoiding secondary oxidation caused by being drawn into the air. Therefore, the cleanliness of the molten steel is improved.

[0031] It should also be noted that after the molten steel collides with the base 210 of the turbulence suppressor 20, it is reflected upward. Most of the molten steel reflected upward will be blocked by the upper edge 230, effectively preventing the molten steel from flowing directly to the nearby wall of the tundish. Since the upper edge 230 can effectively prevent the molten steel from flowing directly to the nearby wall of the tundish, damage to the wall is avoided, thereby extending the service life of the tundish. Similarly, since the turbulence suppressor 20 is provided at the bottom of the tundish body 10, the molten steel flowing out of the long water nozzle 110 will not directly contact the bottom of the tundish body 10, but will directly contact the base 210 of the turbulence suppressor 20, so that the molten steel is prevented from scouring the bottom of the tundish body 10, thereby preventing the refractory material at the bottom of the tundish body 10 from being damaged, thereby extending the service life of the refractory material at the bottom of the tundish body 10, thereby extending the service life of the tundish.

[0032] In some embodiments, the side wall 220 is provided with holes, and the extending direction of the holes is parallel to the base 210 .

[0033] In other embodiments, a hole is disposed on the side wall 220 , and the angle between the extending direction of the hole and the base 210 is within a preset first angle range.

[0034] It should be noted that the first angle range can be 0 to 90 degrees, such as 45 degrees. The first angle range can be such that the molten steel flowing out of the holes in the side wall 220 flows to the surface of the molten steel in the tundish, so that the molten steel will not flow to the bottom of the tundish body 10, thereby avoiding the scouring of the refractory material at the bottom of the tundish body 10, and extending the service life of the refractory material at the bottom of the tundish body 10. The first angle range can also be such that the molten steel flowing out of the holes in the side wall 220 flows to the bottom of the tundish body 10, so that after the molten steel collides with the bottom of the tundish body 10, the flow rate of the molten steel can be further reduced, effectively inhibiting the molten steel from flowing directly to the surface of the molten steel in the tundish, avoiding severe disturbance of the molten steel surface in the tundish, thereby avoiding part of the tundish covering agent being drawn into the molten steel to form inclusions, and avoiding secondary oxidation caused by the air being drawn in, so as to improve the cleanliness of the molten steel.

[0035] In some embodiments, the side wall 220 may include: a first portion of the side wall and a second portion of the side wall; wherein the inward extension length of the upper edge 230 at the first portion of the side wall is greater than the inward extension length at the second portion of the side wall, and the distance between the first portion of the side wall and the steel outlet of the tundish body 10 is less than the distance between the second portion of the side wall and the steel outlet of the tundish body 10.

[0036] It should be noted that, when the tundish body 10 includes multiple steel outlets, the distance between the first portion of the side wall and the steel outlet of the tundish body 10 refers to the minimum distance between the first portion of the side wall and the steel outlet of the tundish body 10, and the distance between the second portion of the side wall and the steel outlet of the tundish body 10 refers to the minimum distance between the second portion of the side wall and the steel outlet of the tundish body 10.

[0037] It should be noted that the upper edge 230 can effectively inhibit the flow of molten steel, and because the inward extension length of the upper edge 230 at the first part side wall is greater than the inward extension length at the second part side wall, the flow rate of molten steel flowing to the side where the first part side wall is located is less than the flow rate of molten steel flowing to the side where the second part side wall is located, that is, most of the molten steel flowing out of the long water nozzle 110 will flow to the side where the second part side wall is located. Because the distance between the first part side wall and the steel outlet of the tundish body 10 is less than the distance between the second part side wall and the steel outlet of the tundish body 10, most of the molten steel flowing out of the long water nozzle 110 will not directly pass through the side where the first part side wall is located, and then directly flow to the steel outlet, but will pass through the side where the second part side wall is located, and then flow to the steel outlet, so that the residence time of the molten steel in the tundish is increased, so that the inclusions in the molten steel can have sufficient time to float up, so as to remove the molten steel inclusions and improve the cleanliness of the molten steel.

[0038] In some embodiments, the number of holes per sidewall in the first portion of sidewalls is less than the number of holes per sidewall in the second portion of sidewalls.

[0039] For example, if the number of holes in each sidewall of the second part is 2, then the number of holes in each sidewall of the first part can be 1 or 0; if the number of holes in each sidewall of the second part is 3, then the number of holes in each sidewall of the first part can be 1 or 2; if the number of holes in each sidewall of the second part is 4, then the number of holes in each sidewall of the first part can be 1, 2 or 3; if the number of holes in each sidewall of the second part is 5, then the number of holes in each sidewall of the first part can be 1, 2, 3 or 4; if the number of holes in each sidewall of the second part is 6, then the number of holes in each sidewall of the first part can be 1, 2, 3, 4 or 5; if the number of holes in each sidewall of the second part is 10, then the number of holes in each sidewall of the first part can be 1, 4, 6, 7 or 9, and so on.

[0040] It should be noted that, since the number of holes in each side wall of the first part is smaller than the number of holes in each side wall of the second part, the molten steel flow rate of each hole in the side wall of the first part is smaller than the molten steel flow rate of each hole in the side wall of the second part. Therefore, most of the molten steel flowing out of the long water nozzle 110 will not directly pass through the side where the first part side wall is located and then flow directly to the steel outlet, but will pass through the side where the second part side wall is located and then flow to the steel outlet. Therefore, the residence time of the molten steel in the ladle is increased, so that the inclusions in the molten steel can have sufficient time to float up, so as to remove the inclusions in the molten steel and improve the cleanliness of the molten steel.

[0041] In some embodiments, a diameter of a hole in each of the first portion of sidewalls is smaller than a diameter of a hole in each of the second portion of sidewalls.

[0042] For example, if the diameter of the hole in each side wall of the second part is 0.05m, then the number of holes in each side wall of the first part can be 0.01m or 0.02m, etc.; if the diameter of the hole in each side wall of the second part is 0.06m, then the number of holes in each side wall of the first part can be 0.03m or 0.05m, etc.; if the diameter of the hole in each side wall of the second part is 0.07m, then the number of holes in each side wall of the first part can be 0.01m or 0.06m, etc.; if the diameter of the hole in each side wall of the second part is 0.08m, then the number of holes in each side wall of the first part can be 0.05m or 0.07m, etc.

[0043] It should be noted that, since the diameter of the holes in each side wall of the first part is smaller than the diameter of the holes in each side wall of the second part, the molten steel flow rate of each hole in the side wall of the first part is smaller than the molten steel flow rate of each hole in the side wall of the second part. Therefore, most of the molten steel flowing out of the long water nozzle 110 will not directly pass through the side where the first part side wall is located, and then directly flow to the steel outlet, but will pass through the side where the second part side wall is located, and then flow to the steel outlet. Therefore, the residence time of the molten steel in the ladle is increased, so that the inclusions in the molten steel can have sufficient time to float up, so as to remove the inclusions in the molten steel and improve the cleanliness of the molten steel.

[0044] In some embodiments a, reference Figure 1 As shown, the tundish body 10 may include: a first steel outlet 120 and a second steel outlet 130 respectively arranged on both sides of the bottom of the tundish body 10, the outer shape of the tundish body 10 is a rectangular parallelepiped, and the first steel outlet 120 and the second steel outlet 130 are respectively located in the vicinity of the two ends of the longer side of the tundish body 10.

[0045] It should be noted that the number of the steel outlets of the tundish body 10 can be set according to actual needs, and can be 1, 2, 3, etc.

[0046] In some embodiments b, reference Figure 2 and Figure 3 As shown, the turbulence suppressor 20 has an octagonal prism shape, the first part of the side wall includes a first sub-side wall, a second sub-side wall, a third sub-side wall, a fourth sub-side wall, a fifth sub-side wall and a sixth sub-side wall, the second part of the side wall includes a seventh sub-side wall and an eighth sub-side wall opposite to the seventh sub-side wall, the length of each side wall in the first part of the side wall is the same, the length of each side wall in the second part of the side wall is the same, the length of each side wall in the first part of the side wall is less than the length of each side wall in the second part of the side wall; each side wall in the second part of the side wall is parallel to the longer side of the intermediate package body 10.

[0047] In some embodiments c, the angle between the faces of the octagonal prism may be 135 degrees, and the length of each side wall in the second portion of side walls may be twice the length of each side wall in the first portion of side walls.

[0048] In some embodiments d, a rectangular hole is provided on the first sub-side wall, the second sub-side wall, the third sub-side wall, the fourth sub-side wall, the fifth sub-side wall and the sixth sub-side wall, and two rectangular holes are provided on the seventh sub-side wall and the eighth sub-side wall, and the length of the rectangular holes is 0.05m to 0.15m, and the width is 0.02m to 0.05m.

[0049] It should be noted that different tundish bodies 10 need to be provided with corresponding different turbulence suppressors 20, which can more effectively achieve the beneficial effects of improving the cleanliness of molten steel, reducing inclusions and reducing turbulent kinetic energy. Through multiple experiments, the tundish body 10 and turbulence suppressors 20 corresponding to the above-mentioned implementation modes a, b, c and d can be selected, and the following is a specific description: a 60t two-stream slab continuous casting tundish is used to cast a 1500mm×230mm slab, and the casting steel type is ultra-low carbon LF steel. After the experiment, the following Table 1 is obtained. Table 1 is the characteristic parameters and other parameters of the molten steel RTD (Res idence Time Distribution) curve, among which, Scheme T1 is a tundish with an existing turbulence suppressor 20, and Scheme T2 is a tundish with a turbulence suppressor 20 according to an embodiment of the present invention. min is the stagnation time of plug flow, t max is the peak time, t a is the actual average residence time, V p is the volume fraction of the piston area, V d is the dead zone volume fraction, V m is the volume fraction of the mixing zone. In addition, refer to Figure 4 As shown, Figure 4 2 is a comparison diagram of the RTD curves of the molten steel corresponding to the existing turbulence suppressor 20 and the turbulence suppressor 20 of the embodiment of the present invention. Regarding the turbulent kinetic energy, the turbulent kinetic energy corresponding to the existing turbulence suppressor 20 is 9.36×10 -4 m 2 ·s -2 The turbulent kinetic energy corresponding to the turbulence suppressor 20 of the embodiment of the present invention is 8.99×10 -4 m 2 ·s -2 Regarding the slag mass, the existing turbulence suppressor 20 is 22.3 kg, while the turbulence suppressor 20 of the embodiment of the present invention is 21.1 kg. Regarding the inclusion removal rate, refer to Figure 5 , Figure 5 The figure is a comparison chart of the inclusion removal rate corresponding to the existing turbulence suppressor 20 and the turbulence suppressor 20 of the embodiment of the present invention. The turbulence suppressor 20 provided by the embodiment of the present invention reduces the turbulent kinetic energy of molten steel by 3.98%, reduces the mass of slag rolls by 5.38%, and improves the removal capacity of inclusions larger than 150 μm by 15%.

[0050] Table 1:

[0051]

[0052] It should be noted that when the molten steel flows into the tundish from the long water inlet 110 of the tundish, the velocity gradient of the molten steel in the injection zone is very large. After the high-speed molten steel rushes to the bottom of the tundish, it directly flows to the surface of the molten steel and the nearby wall of the tundish, causing severe disturbance on the surface of the molten steel. Part of the tundish covering agent is drawn into the molten steel to form impurities. At the same time, it is easy to be drawn into the air for secondary oxidation, and the impact on the bottom of the tundish causes excessive erosion of the refractory material at the bottom of the tundish. These greatly affect the flow pattern of the molten steel in the tundish and the loss of the refractory material. In view of the above problems, the embodiment of the present invention can effectively reduce the velocity of the molten steel in the injection zone of the tundish, weaken the intensity of the reflected flow generated by the impact of the steel flow on the bottom of the tundish, thereby reducing the turbulence on the surface of the molten steel, reducing the emulsification of the slag, and reducing the scouring of the refractory material. At the same time, the turbulence controller can control the turbulent kinetic energy of the molten steel in the tundish when the tundish is poured, the tundish is changed, and other non-steady states, to ensure that the billet drawing speed remains unchanged during the ladle change. The ability of the tundish to remove inclusions is significantly improved, and the quality of the casting, especially the quality of the head billet, is improved.

[0053] The tundish provided in the embodiment of the present invention comprises: a tundish body 10; a turbulence suppressor 20, which is arranged at the bottom of the tundish body 10 and below the long water nozzle 110 of the tundish body 10. The turbulence suppressor 20 is a polyhedron with a hollow interior and an opening with an edge at the top, and is used to reduce the flow velocity of the molten steel flowing out of the long water nozzle 110. When the molten steel flows into the tundish from the long water nozzle 110 of the tundish, the molten steel will flow into the turbulence suppressor 20. Since the top opening of the turbulence suppressor 20 has an edge, the turbulence suppressor 20 can effectively suppress the molten steel from reflecting and flowing to the molten steel surface and the nearby wall of the tundish after colliding with the turbulence suppressor 20, and can reduce the flow velocity of the molten steel, so as to avoid the violent disturbance of the molten steel surface of the tundish, thereby avoiding part of the tundish covering agent from being drawn into the molten steel to form inclusions, and avoiding the secondary oxidation caused by the air being drawn in. Therefore, the cleanliness of the molten steel is improved.

[0054] Based on the same inventive concept, an embodiment of the present invention provides a continuous casting system, comprising the tundish of any one of the above embodiments.

[0055] It should be understood that more implementation details of the continuous casting system in the embodiment of the present invention refer to the aforementioned tundish, and for the sake of brevity of the specification, they will not be repeated here.

[0056] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A tundish, characterized in that: include: Tundish body; The turbulence suppressor is arranged at the bottom of the tundish body and below the long water outlet of the tundish body. The turbulence suppressor is a polyhedron with a hollow interior and an opening with an edge on the top, and is used to reduce the flow velocity of the molten steel flowing out of the long water outlet.

2. The tundish according to claim 1, characterized in that: The turbulence suppressor comprises: Base; A side wall, one end of which is connected to the edge of the base, and the side wall extends toward the top of the base; An upper edge, one end of which is connected to the other end of the side wall, and the upper edge extends toward the interior of the turbulence suppressor.

3. The tundish according to claim 2, characterized in that: The side wall is provided with a hole, and the extending direction of the hole is parallel to the base.

4. The tundish according to claim 2, characterized in that: include: The side wall is provided with a hole, and the included angle between the extending direction of the hole and the base is within a preset first angle range.

5. The tundish according to claim 3 or 4, characterized in that: The side wall comprises: a first portion of the side wall and a second portion of the side wall; The inward extension length of the upper edge at the first portion side wall is greater than the inward extension length at the second portion side wall, and the distance between the first portion side wall and the steel outlet of the tundish body is less than the distance between the second portion side wall and the steel outlet of the tundish body.

6. The tundish according to claim 5, characterized in that: The number of holes in each side wall of the first portion of side walls is less than the number of holes in each side wall of the second portion of side walls.

7. The tundish according to claim 5, characterized in that: The tundish body comprises: The first and second steel outlets are respectively arranged on both sides of the bottom of the tundish body. The shape of the tundish body is a rectangular parallelepiped. The first and second steel outlets are respectively located near the two ends of the longer side of the tundish body.

8. The tundish according to claim 7, characterized in that: The turbulence suppressor has an octagonal prism shape, the first portion of the sidewalls includes a first sub-sidewall, a second sub-sidewall, a third sub-sidewall, a fourth sub-sidewall, a fifth sub-sidewall and a sixth sub-sidewall, the second portion of the sidewalls includes a seventh sub-sidewall and an eighth sub-sidewall opposite to the seventh sub-sidewall, the length of each sidewall in the first portion of the sidewalls is the same, the length of each sidewall in the second portion of the sidewalls is the same, and the length of each sidewall in the first portion of the sidewalls is less than the length of each sidewall in the second portion of the sidewalls; Each of the second portion of side walls is parallel to the longer side of the tundish body.

9. The tundish according to claim 8, characterized in that: A rectangular hole is provided on each of the first sub-side wall, the second sub-side wall, the third sub-side wall, the fourth sub-side wall, the fifth sub-side wall and the sixth sub-side wall, and two rectangular holes are provided on each of the seventh sub-side wall and the eighth sub-side wall, wherein the length of the rectangular holes is 0.05m to 0.15m and the width is 0.02m to 0.05m.

10. A continuous casting system, characterized in that: The intermediate package comprises the intermediate package as claimed in any one of claims 1 to 9.

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