Impact tank with vertical and horizontal barriers

Abstract

In order to improve the flow properties of a metal melt poured into an impingement tank (1), in particular for eccentric and / or angled pouring of the melt, the impingement tank (2) comprises a bottom (10) having an impingement surface (10s), a wall (12) having an inner surface (12i), the wall (12) extending upwardly from the bottom (10) to an upper end (14) of the impingement tank (11), the impingement surface (10s) and the inner surface (12i) of the wall (12) defining an inner space (16), according to the invention, a number of horizontal barriers (2) are provided, which protrude from the inner surface (12i) of the wall (12) into the interior space (16) in the protruding direction (p), and a number of vertical barriers (3), which protrude from the inner surface (12i) of the wall (12) into the interior space (16) in the protruding direction (p), a plurality of vertical barriers (3) are arranged below several horizontal barriers (2) adjacent to the respective vertical barriers.

Description

Technical Field

[0001] The present disclosure relates to a fire-resistant impact tank, which includes a bottom with an impact surface and a wall with an inner surface, the wall extending upward from the bottom to the upper end of the impact tank, the impact surface and the inner surface of the wall defining an inner space, in which a plurality of horizontal barriers are arranged, and the plurality of horizontal barriers protrude from the inner surface of the wall into the inner space in a protruding direction. Background Art

[0002] A refractory (i.e., fireproof) impact pot, also called an impact pad, for a metallurgical vessel (e.g., a tundish) generally has a barrel-like shape, comprising a bottom with an upper impact surface and a wall with an inner surface. The wall extends upward from the bottom to an upper end of the impact pot. The inner surface of the wall and the impact surface of the bottom define a central interior space of the impact pot.

[0003] Liquid metal is poured into a metallurgical vessel and an impact pot is arranged inside the metallurgical vessel for reducing turbulence and splashing of the metal melt during and after pouring. Various structural modifications have been made to the impact pots of the general type in order to further improve the turbulence and splashing behavior. In WO 95 / 13890A1, an annular portion is disclosed, which extends inwardly and upwardly toward the circumferential upper end of the impact pot. In WO 03 / 082499A1, one or more portions of the circumferential upper end of the impact pot support, the so-called overhang portion, protrude inwardly into the central space of the impact pot. In WO 2012 / 012853A1, the inner surface of the wall is provided with a barrier of rectangular shape, while the impact surface of the bottom is provided with corrugations. EP 2769785 B1 discloses an inverted "V"-shaped or "W"-shaped barrier at the inner surface of the wall, thereby further providing a reduction in turbulence.

[0004] All known impingement pot designs have problems dealing with misalignment of the ladle shroud (or similar nozzle) through which the molten metal is fed into the impingement pot. Eccentric and / or angled pouring of the molten metal by a misaligned ladle shroud or nozzle may result in splashing of the molten metal at the start of the casting process and unfavorable flow patterns during the steady state casting process, which may result in reduced product quality. Summary of the invention

[0005] It is therefore an object of the present invention to provide an impingement pot which further improves the flow properties of a metal melt poured into the impingement pot, in particular for eccentric and / or angled pouring of the melt.

[0006] This object has been achieved by providing an impact can comprising: a plurality of vertical barriers extending from an inner surface of a wall into an inner space in a protruding direction, wherein the plurality of vertical barriers are arranged below a plurality of horizontal barriers adjacent to the respective vertical barriers. A vertical passage may be defined by two side walls adjacent to the vertical barriers and corresponding side walls of the impact can.

[0007] A vertical barrier is located adjacent to and below a horizontal barrier means that the centroid of the vertical barrier is located below the centroid of the adjacent horizontal barrier. "Below" may also be considered closer to the bottom or further from the top.

[0008] "Several" means "at least one", while "a plurality" means "at least two". Furthermore, "adjacent to" is considered to be adjacent (or in other words, consecutive or sequential), but with a distance, i.e. not contiguous. Therefore, by definition, a vertical barrier is vertically spaced a distance from an adjacent horizontal barrier. Since a vertical barrier is located below an adjacent horizontal barrier, a vertical barrier that is not adjacent to the horizontal barrier (because it is located on another segment of the wall, or on the same wall segment but not the next vertical barrier in the circumferential direction, i.e. not adjacent) may also be located (partially or completely) above the non-adjacent horizontal barrier.

[0009] It is preferred when the vertical barriers of one wall segment (e.g. on one side of an impact pot with an impact surface of polygonal (e.g. rectangular) shape) are located below all horizontal barriers of said wall segment. This results in a symmetrical flow behavior over this wall segment. It is even more preferred when the plurality of vertical barriers are located below all horizontal barriers. This results in a symmetrical flow over all sides of the wall.

[0010] Impingement pots may be used in metallurgical vessels, such as tundishes, to reduce turbulence and splashing of liquid metal melt poured into the metallurgical vessel during and after pouring.

[0011] The symmetrical flow of liquid metal in the impingement tank causes a symmetrical flow downstream of the tundish, which provides several benefits to the process, such as: uniform temperature and composition in the different strands; higher residence time, thereby improving the removal of non-metallic inclusions by flotation; lower tendency to form eddies in the strands, reducing the risk of slag contamination of the mold and mold level fluctuations; reduced wall shear stresses in the refractory lining, resulting in better refractory life; and lower turbulence in the slag interface, resulting in a lower risk of reoxidation of the steel bath. It has been shown that by using several horizontal barriers and a plurality of vertical barriers as disclosed herein, the liquid metal poured into the impingement tank is evenly distributed within the tundish in which the impingement tank is arranged. This is also true in the case where the liquid metal stream is poured into the impingement tank and onto the impingement surface at a non-orthogonal angle, and / or if the liquid metal stream is not aligned with the center of the impingement tank. This effect is achieved because at least one horizontal barrier and a plurality of vertical barriers arranged below at least one horizontal barrier adjacent to the respective vertical barrier act as diffusers for the metal stream poured into the impingement tank and flowing out of the impingement tank into the surrounding tundish. When liquid metal is poured from the center of the impact tank in an offset direction, the liquid metal may show a tendency to flow out of the impact tank on the side opposite to the offset direction because this is the path of least resistance. This makes the flow distribution of the liquid metal in the tundish uneven. When multiple vertical barriers are located below several horizontal barriers adjacent to the corresponding vertical barriers, the flow of the liquid metal is evenly distributed over the entire cross-section of the impact tank. The main functions and advantages of the vertical barriers are: (1) breaking the horizontal velocity components that may be asymmetric in the liquid metal flow, and (2) promoting the upward flow in the entire horizontal cross-section of the impact tank to avoid the strong upward flow that is concentrated only on the opposite side associated with the eccentrically entering liquid metal jet. However, the vertical barriers cannot completely make the flow uniform because different vertical channels (between adjacent vertical barriers) may have different vertical flow velocities because each vertical channel is at a different position relative to the liquid metal jet impact area. In order to achieve proper symmetrical flow, it is expected that the vertical velocity of the liquid metal flow at a given vertical channel is neither higher nor lower than the average upward liquid metal flow velocity. Liquid metal flowing upward through the vertical channel collides with a horizontal barrier located above (adjacent to the vertical barrier that is the boundary of the vertical channel), resulting in the following advantages: (1) the flow velocity between adjacent vertical channels is made uniform due to the mixing caused when the flows from adjacent vertical channels are forced to collide with each other after colliding with the horizontal barrier located above; (2) the longer path required for the fluid to bypass the horizontal barrier after colliding with the horizontal barrier dissipates the flow kinetic energy. Therefore, the vertical barrier significantly enhances the function of the horizontal barrier by guiding the flow directly against the horizontal barrier. On the other hand, the horizontal barrier equalizes the different vertical velocities in different vertical channels to avoid flow asymmetry. The collision of the vertical flow of liquid metal with the horizontal barrier located above may also have the effect of promoting slight local turbulence, which helps to achieve the above effects.The combination of vertical and horizontal barriers as disclosed herein provides uniform flow out of the impingement pot and into the tundish even under adverse conditions where the ladle shroud or nozzle is severely misaligned. The number of horizontal barriers combined with the plurality of vertical barriers located below according to the present disclosure allows for effective balancing of the distribution of incoming steel in the tundish and dissipation of its kinetic energy. This effect is achieved even under adverse conditions where the incoming liquid metal jet is severely misaligned.

[0012] The vertical barrier and the adjacent horizontal barrier are not contiguous in the sense that there are some openings where the incoming flow from the adjacent vertical channel can mix and equalize after colliding with the horizontal barrier.

[0013] The circumferential direction extends horizontally along the inner surface, viewed clockwise from above. The vertical direction is considered to be directed perpendicularly from the impact surface of the bottom to the upper end of the wall. If the inner surface of the wall is perpendicular to the impact surface of the bottom, the vertical direction is parallel to the inner surface of the wall. The protrusion direction is considered to be directed perpendicularly from the inner surface of the wall to the inner space of the impact tank. If the inner surface of the wall is perpendicular to the impact surface of the bottom, the protrusion direction is parallel to the impact surface of the bottom. The barrier can be defined by its horizontal dimension, its vertical dimension and its protrusion dimension. The horizontal dimension is the dimension in the circumferential direction, the vertical dimension is the dimension in the vertical direction and the protrusion dimension is the dimension in the protrusion direction.

[0014] In the present disclosure, a vertical barrier is defined as a barrier of which at least a portion has a vertical dimension greater than a horizontal dimension, and a horizontal barrier is defined as a barrier of which at least a portion has a horizontal dimension greater than a vertical dimension. A vertical barrier may also be defined as a barrier of which the vertical dimension of its bounding box is greater than the horizontal dimension. A bounding box is the smallest cuboid box within which the barrier can be completely contained. Preferably, the total vertical dimension of the vertical barrier is greater than the horizontal dimension, and / or the horizontal dimension of the horizontal barrier is greater than the vertical dimension. Preferably, the vertical dimension of the vertical barrier is at least 10% greater than its horizontal dimension, preferably 25% greater, most preferably 50% greater. Preferably, the horizontal dimension of the horizontal barrier is at least 10% greater than its vertical dimension, preferably 25% greater, most preferably 50% greater.

[0015] The upper end of the impingement pot may be closed along the circumference of the wall, or may also have gaps and / or slits (as disclosed in EP 2418 032 B1 or similar patents) and / or another profile. Holes through the wall may also be provided to push the flow towards areas of the tundish where the liquid metal stream may have a lower temperature or may be stagnant. This may be particularly advantageous in tundish configurations with multiple strands, where strands located further away from the impingement pot may receive cooler steel than strands located closer to the impingement pot. In this case, holes in the wall of the impingement pot may be advantageous to direct some of the higher temperature incoming flow to these distant areas.

[0016] If only one horizontal barrier is used, this may be provided as a lip or overhang along the entire circumference or part of the circumference of the inner wall.

[0017] Preferably, a plurality of horizontal barriers are provided, wherein the plurality of vertical barriers are at least partially arranged in a horizontal gap between horizontal barriers adjacent to the respective vertical barriers. Since "adjacent" is defined as adjacent rather than abutting, the vertical barriers are vertically spaced a distance from the adjacent horizontal barriers. Providing a plurality of horizontal barriers allows for an even better reduction in turbulence of the metal melt. A plurality of horizontal barriers may allow the associated horizontal barrier of a vertical channel (in the horizontal gap between two adjacent vertical barriers) to be located above it, which increases the synergistic effect of the vertical and horizontal barriers to dissipate kinetic energy and to make the flow uniform.

[0018] Advantageously, a plurality of horizontal barriers and a plurality of vertical barriers are arranged alternately along the circumference of the inner surface of the wall. By doing so, the above advantages are further increased, because the total kinetic energy of the incoming liquid metal jet is distributed between the different vertical barriers and horizontal barriers positioned along the circumference, and each vertical channel has its associated horizontal barrier above it.

[0019] The horizontal gap between adjacent horizontal barriers also increases the overall cross-section of the impingement pot opening compared to the case without the horizontal gap. The larger horizontal cross-section of the impingement pot opening allows the flow to pass from the impingement pot into the tundish in a more diffuse manner. If the liquid metal flows over a larger area, its average velocity will therefore be lower, which increases the residence time and reduces the undesirable turbulence in the tundish. The horizontal gap between adjacent horizontal barriers is preferably at least 5 mm to 10 mm and at most 40 mm to 60 mm.

[0020] Several horizontal barriers may have an upper surface that includes one or more of the following shapes and orientations: tilted upward in the protruding direction, tilted downward in the protruding direction, neither tilted upward nor tilted downward in the protruding direction, curved in the horizontal circumferential direction of the inner surface, tilted upward in the circumferential direction of the inner surface, tilted downward in the circumferential direction of the inner surface, neither tilted upward nor tilted downward in the circumferential direction of the inner surface. Tilt downward means falling, tilt upward means rising, such that (assuming the inner surface is perpendicular to the impact surface of the bottom) the upper surface tilted downward in the protruding direction is approaching the impact surface of the bottom, wherein the upper surface tilted upward in the protruding direction is away from the upper surface of the bottom. If the inner surface of the wall is at an angle other than a right angle to the impact surface of the bottom, the protruding direction is not parallel to the impact surface, and preferably, when the upper surface of several horizontal barriers tilts upward or downward in the protruding direction, it is parallel to the impact surface of the bottom and / or the horizontal plane (the bottom may tilt upward or downward from the horizontal plane, etc.).

[0021] It is most preferred if the upper surface of the horizontal barrier is inclined downwards in the protruding direction. This means that if the inner surface of the wall is perpendicular to the upper impact surface of the bottom, the upper surface is approaching the impact surface of the bottom. If the inner surface of the wall is not perpendicular to the upper impact surface of the bottom, it is also preferred that the upper surface is inclined downwards so that the upper surface approaches the impact surface of the bottom. The downward inclination of the upper surface is beneficial in case an eccentric liquid metal jet collides with the upper surface of the horizontal barrier. Compared to the upper surface of the horizontal barrier that is not inclined downwards in the protruding direction, the downwardly inclined upper surface has the advantage of directing the incoming flow hitting said upper surface towards the inner space of the impact tank, thereby reducing splashing.

[0022] It is particularly advantageous for several horizontal barriers to have upper surfaces that are alternately inclined upwards and downwards in the circumferential direction of the inner surface. Downward inclination again means falling, and inclined again means rising, so that the upper surface that is inclined downwards in the circumferential direction is close to the bottom, wherein the upper surface that is inclined upwards in the protruding direction is away from the bottom.

[0023] This may be the case if only one horizontal barrier is provided, but it may also be the case if multiple horizontal barriers are provided, for example in the shape of one or more inverted "V" shapes. The advantage of this shape is that if an incoming eccentric liquid metal jet strikes the top surface of the horizontal barrier, splashing is reduced because the shape directs the incoming jet downwardly towards the interior space of the impact tank, reducing the effect of molten steel droplets splashing upwardly (which would be a safety issue in the steel plant). Multiple horizontal barriers as disclosed in EP 2769785B1 can be used. The angle between the upwardly inclined upper surface and the downwardly inclined upper surface can vary between >45 degrees and <170 degrees, with a preferred lower limit of >90 degrees and a preferred upper limit of <140 degrees. The transition area between the upwardly inclined upper surface and the downwardly inclined upper surface can be curved, rather than a specific angle between the upwardly inclined upper surface and the downwardly inclined upper surface. The upwardly inclined upper surface and the downwardly inclined upper surface can have the same or different lengths. The upper surface which is inclined upwards and downwards in the circumferential direction can be formed as a straight leg or at least has a straight section, but can also be curved, for example convex or concave. Moreover, the upper surface can be inclined upwards and / or downwards in the circumferential direction and can also be inclined or downwards in the protruding direction.

[0024] Several horizontal barriers may have a lower surface that is perpendicular to the inner wall (i.e., neither inclined upwards nor downwards in the protruding direction) and parallel to the circumferential direction (i.e., neither inclined upwards nor downwards in the circumferential direction), even though the upper surface may be inclined upwards and / or downwards in the protruding direction and inclined upwards and / or downwards in the circumferential direction. Several horizontal barriers having a lower surface perpendicular to the inner wall facilitate the flow properties of the liquid metal and also allow for easier production of these horizontal barriers. Several horizontal barriers may also have a lower surface that is parallel to the upper surface.

[0025] The cross-sectional profile of several horizontal barriers along the circumferential direction (ie, in a plane spanning between the protrusion direction and the vertical direction) may vary. The cross-sectional profile may be, for example, polygonal (e.g., rectangular or triangular), semicircular, elliptical, etc. Combinations of those shapes may also be used.

[0026] Preferably, the plurality of vertical barriers have an upper surface which comprises one or more of the following shapes and orientations: tilted upward in the protruding direction, tilted downward in the protruding direction, neither tilted upward nor tilted downward in the protruding direction, curved in the circumferential direction of the inner surface, tilted upward in the circumferential direction of the inner surface, tilted downward in the circumferential direction of the inner surface, neither tilted upward nor tilted downward in the circumferential direction of the inner surface. Tilt downward means falling, tilt upward means rising, such that (assuming the inner surface is perpendicular to the impact surface of the bottom) the upper surface tilted downward in the protruding direction approaches the impact surface of the bottom, wherein the upper surface tilted in the protruding direction is spaced a distance from the impact surface of the bottom. If the inner surface of the wall makes an angle which is not a right angle with the impact surface of the bottom, the protruding direction is not parallel to the impact surface, and preferably, when the upper surface of the plurality of horizontal barriers tilts upward or downward in the protruding direction, it is parallel to the inner surface of the bottom and / or the horizontal plane (the bottom may be tilted or tilted downward from the horizontal plane, etc.).

[0027] If a vertical barrier is at least partially located in a horizontal gap between horizontal barriers adjacent to the respective vertical barrier, and the upper surface of the vertical barrier is not parallel to the circumferential direction and has a peak, for example due to an upwardly inclined and / or downwardly inclined portion or a rounded portion, the peak may extend above the lower surface of the horizontal barrier adjacent to the vertical barrier, or even to some extent above the upper surface of the horizontal barrier. Nevertheless, in this case, this vertical barrier is still considered to be located below the horizontal barrier adjacent to the vertical barrier. Generally, the centroid of a vertical barrier can be considered to be lower than the centroid of a horizontal barrier adjacent to the vertical barrier.

[0028] Preferably, the side walls of several vertical barriers are planar, preferably perpendicular to the impact surface of the bottom. The side walls may also be curved or irregular. The side walls of several vertical barriers may intersect the inner surface of the wall at a side wall angle of 75-105 degrees, preferably 80-100 degrees, most preferably 90-95 degrees. This side wall angle describes an "outer angle", i.e. an "inner angle" as viewed from the interior space, not from within the vertical barrier. A side wall that intersects the inner surface of the wall at a side wall angle of 90 degrees is perpendicular to the inner surface of the wall. The side walls of the vertical barriers may intersect the impact surface of the bottom at an angle of 75-105 degrees, preferably 80-100 degrees, most preferably 90-95 degrees. An angle of 90 degrees enhances the effect of disrupting the horizontal velocity component of the liquid metal flow along the impact surface of the bottom. Angles greater than 90 degrees allow for easier production of impact tanks, so angles slightly above but close to 90 degrees may be preferred.

[0029] Preferably, the wall of the impingement pot (measured from the impingement surface to the upper edge of the wall) has a constant height of, for example, 100-400 mm, preferably 105-380 mm. Typical wall height values ​​are 105 mm, 160 mm, 180 mm, 210 mm, 235 mm, 250 mm or 380 mm.

[0030] Preferably, the distance between the closest points of adjacent vertical and horizontal barriers is at least 5 mm, most preferably at least 10 mm.

[0031] Preferably, the distance between the closest points of adjacent vertical and horizontal barriers is at most 50% of the wall height, most preferably at most 85%.

[0032] The plurality of vertical barriers may extend into the interior space by an amount of 5%-15% of the dimension of the interior space in the protruding direction of the corresponding vertical barrier. The extension of the interior space in the protruding direction describes the distance from the inner surface of the wall at the location of the corresponding vertical barrier to the opposite inner surface of the wall. If the impact surface of the bottom is rectangular and has a size of 520 x 720 mm, wherein the extension of the vertical barrier into the interior space is 5%-15% of the dimension of the interior space in the protruding direction of the corresponding vertical barrier, this makes the vertical barrier extend into the interior space by 26-78 mm for a wall segment with an inner surface length of 520 mm (i.e. the vertical barrier is arranged at a wall segment with an inner surface length of 720 mm), and the vertical barrier extends into the interior space by 36-108 mm for a wall segment with an inner surface length of 720 mm (i.e. the vertical barrier is arranged at a wall segment with an inner surface length of 520 mm).

[0033] Preferably, the vertical barrier on at least one side wall extends into the interior space by at least 26 mm and / or at most 78 mm.Preferably, the vertical barrier on at least one side wall extends into the interior space by at least 36 mm and / or at most 108 mm.

[0034] Preferably, the plurality of vertical barriers extend into the interior space by at least 10 mm and / or at most 75 mm. The plurality of vertical barriers may also extend into the interior space by at least 26 mm and / or at most 108 mm.

[0035] The plurality of vertical barriers may have a height of 25%-70%, preferably 25%-60% of the total inner surface height of the adjacent wall. The latter is particularly preferred when the inner surface height of the adjacent wall is less than 300mm.

[0036] Preferably, the plurality of vertical barriers have a height of at least 25 mm, most preferably at least 35 mm.

[0037] Preferably, a plurality of vertical barriers are arranged adjacent to the impact surface of the bottom. A vertical barrier adjacent to the impact surface of the bottom (or at a certain distance, but very close to the impact surface of the bottom so that it affects the flow as if adjacent) is beneficial for flow distribution, because the (asymmetric) flow usually runs parallel to the impact surface of the bottom after the (eccentric) liquid metal jet collides with the impact surface, so the vertical barrier is preferably arranged at a position close to the impact surface of the bottom to maximize its ability to intercept the liquid metal flow and guide it upwards.

[0038] A plurality of vertical barriers may also be arranged spaced apart from the impact surface, for example by at least 5 mm and / or at most 40 mm, wherein preferably a plurality of vertical barriers are arranged at the same distance from the impact surface. It is also possible that adjacent vertical barriers are connected to each other on the underside or are arranged on a ridge on the impact surface that runs alongside the inner wall. This ridge may also be considered as part of the bottom of the impact pot, wherein the vertical barriers are arranged on said bottom. Of course, it is also possible that one or some vertical barriers are arranged adjacent to the impact surface, wherein one or more other vertical barriers are arranged at a distance from the impact surface.

[0039] A plurality of vertical barriers are preferably arranged at a distance from the upper end of the impact pot, preferably at the same distance from the upper end of the impact pot. In case the profiled impact surface and / or the upper end of the impact pot is (at least partially) not parallel to the horizontal plane, a different reference (impact surface of the upper end or bottom of the impact pot) may be important, for example with a surface sloping upwards or downwards in the circumferential direction.

[0040] Preferably, several horizontal barriers are arranged at a distance from the upper end of the impact cup, preferably at least 5 mm and / or at most 40 mm. Such an arrangement does not reduce the cross section of the opening at the upper end of the impact cup. The larger the cross section of the opening at the upper end of the impact cup, the greater the tolerance of the incoming liquid metal jet to the ideal (center) position. If a plurality of horizontal barriers are provided, preferably, the plurality of horizontal barriers are arranged at the same distance from the upper end of the impact cup. Of course, some horizontal barriers can also be arranged adjacent to the upper end of the impact cup, wherein other horizontal barriers are arranged at a distance from the upper end of the impact cup. Several horizontal barriers are arranged at a distance from the impact surface. If a plurality of horizontal barriers are provided, preferably, the plurality of horizontal barriers are arranged at the same distance from the impact surface. Likewise, in the case that the forming impact surface and / or the upper end of the impact cup are (at least partially) not parallel to the horizontal plane, a different reference (impact surface of the bottom or upper end of the impact cup) may be important, for example with a surface inclined upwards or downwards in the circumferential direction.

[0041] It is also possible to provide an additional number of horizontal barriers, which are arranged at another distance from the upper end of the impingement pot as the initial number of horizontal barriers. In particular, two or more rows of horizontal barriers may be provided to further homogenize the incoming flows from the different vertical channels.

[0042] Preferably, the horizontal barriers extend into the interior space by 2.5%-15% of the dimension of the interior space in the protruding direction of the corresponding horizontal barriers. The extension of the interior space in the protruding direction describes the distance from the inner surface of the wall at the location of the corresponding vertical barrier to the opposite inner surface of the wall.

[0043] Preferably, the horizontal barrier projects into the interior space by at least 5 mm and / or at most 75 mm.

[0044] It is advantageous when the protrusion length of the vertical barriers exceeds the protrusion length of the horizontal barriers. The protrusion length of the vertical barriers is preferably 20%-100% greater than the protrusion length of the horizontal barriers. A greater protrusion length of the vertical barriers increases the probability that the horizontal flow at the bottom impact surface will collide with said vertical barriers without significant disadvantages. Although the horizontal barriers also benefit from the protrusion length, a greater protrusion length of the horizontal barriers results in a reduction of the cross section in the upper opening region of the impact tank, since these horizontal barriers are close to or located at the upper end of the impact tank. If the above-mentioned cross section should not be reduced excessively, the protrusion length of the horizontal barriers may preferably be smaller than the protrusion length of the vertical barriers.

[0045] Preferably, a plurality of vertical barriers overlap with several horizontal barriers adjacent to the corresponding vertical barriers in the circumferential direction of the inner surface. This arrangement ensures that any liquid metal jet flowing upward in the vertical channel (i.e., between adjacent vertical barriers) collides with the horizontal barrier located above, thereby enhancing the homogenization effect of the liquid metal flow. If a plurality of horizontal barriers are provided, the vertical barriers may overlap with all adjacent horizontal barriers in the circumferential direction. If a plurality of horizontal barriers are provided, the plurality of vertical barriers may overlap with one or two horizontal barriers adjacent to the corresponding vertical barriers in the circumferential direction of the inner surface.

[0046] A plurality of vertical barriers may be spaced apart from several horizontal barriers adjacent to the corresponding vertical barriers in the circumferential direction of the inner surface. This is advantageous in the case where it is desired to increase the cross section in the upper opening region of the impingement tank to obtain a higher liquid metal flow rate. If a plurality of horizontal barriers are provided, the plurality of vertical barriers may overlap with one or two horizontal barriers adjacent to the corresponding vertical barriers in the circumferential direction of the inner surface.

[0047] A plurality of vertical barriers may also be arranged so that they are neither spaced apart from nor overlapped with several horizontal barriers adjacent to the corresponding vertical barriers in the circumferential direction of the inner surface. This means that the relevant vertical barriers and the horizontal barriers adjacent to the vertical barriers cannot overlap and have gaps in the circumferential direction of the inner surface. There is still a gap in the vertical direction. This represents an intermediate configuration between ensuring that each flow flowing upward in the vertical channel (i.e., between adjacent vertical barriers) collides with the corresponding horizontal barrier located above and maintaining the cross-section in the upper opening area at the maximum value. If a plurality of horizontal barriers are provided, the plurality of vertical barriers may be arranged so that they are neither spaced apart from nor overlapped with one or two horizontal barriers adjacent to the corresponding vertical barriers in the circumferential direction of the inner surface.

[0048] If a plurality of horizontal barriers and a plurality of vertical barriers are arranged alternately along the circumference of the inner surface of the wall without gaps therebetween in the circumferential direction (there may be overlaps), this may result in an overall arrangement in which the metal melt flowing along the surface of the inner wall of the impact tank will contact at least one of the vertical barriers and the horizontal barriers. A plurality of horizontal barriers and a plurality of vertical barriers may also be arranged alternately along the circumference of the inner surface of the wall with gaps therebetween in the circumferential direction.

[0049] The impingement pot can be manufactured by casting, pressing, injection molding or 3D printing and can contain basic or non-basic refractory materials. The production of the corresponding impingement pot can include the use of so-called "lost templates", such as templates of combustible material that will be burned off after the production of the impingement pot. The impingement pot can be produced as a single component or assembled from a separate bottom part and a continuous wall or several wall segments. The impingement surface can have any shape, such as trapezoidal, triangular, circular, elliptical, etc., wherein a rectangular shape is preferred.

[0050] Preferably, the vertical barriers and / or the horizontal barriers are integral parts of the adjoining walls, ie are made in one piece with said walls, in other words the walls and the barriers are provided by one ceramic part.

[0051] Preferably, the wall of the impingement pot and its upper end have no or at least no substantial protrusions towards the interior space of the impingement pot in order to provide an inflow area with the largest possible cross section and to avoid splashing of the molten metal even in the event of a misalignment of the liquid metal jet. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 to Fig.12 Exemplary, schematic and non-limiting advantageous embodiments of the present invention are shown, wherein

[0053] FIG1 shows a shock tank having one horizontal barrier and multiple vertical barriers.

[0054] FIG2 shows an impact tank with multiple horizontal barriers and multiple vertical barriers,

[0055] FIG3 shows the impact can of FIG2 , wherein the vertical barriers are arranged on the ridges of the bottom of the impact can,

[0056] FIG. 4 shows the impact can of FIG. 2 , wherein the side wall of the vertical barrier intersects the inner surface of the wall of the impact can at an angle of 95 degrees,

[0057] FIG5 shows an impact pot having a plurality of horizontal barriers and a plurality of vertical barriers, the upper surfaces of the plurality of horizontal barriers being inclined and tilted downward in the circumferential direction and tilted downward in the protruding direction,

[0058] FIG. 6 shows the impact can of FIG. 5 , wherein the sidewall of the vertical barrier intersects the inner surface of the wall of the impact can at a sidewall angle of 95 degrees,

[0059] FIG. 7 shows the impact pot of FIG. 6 , but with the upper surface of the vertical barrier inclined downwardly in the projection direction,

[0060] FIG8 shows the impact pot of FIG6 , but with a vertical barrier whose upper surface is inclined in the circumferential direction and downwardly inclined in the manner of a roof,

[0061] FIG. 9 shows the impact pot of FIG. 6 , but with the upper surface of the vertical barrier being convexly curved in the circumferential direction.

[0062] Fig.10a , Fig.10b , Fig.10c shows a portion of the inner surface of the wall of the impingement can shown in FIG. 5 and the other two embodiments,

[0063] Fig.11ashows a flow simulation of molten metal inside an impingement tank according to the prior art,

[0064] Fig.11b FIG5 shows a simulation of the flow of molten metal inside the impingement tank.

[0065] Fig.12 A detailed area showing the flow of molten metal. DETAILED DESCRIPTION

[0066] 1 to 9 each show an impingement pot 1 comprising a bottom 10 with an upper impingement surface 10s and a wall 12 with an inner surface 12i, wherein the wall 12 extends upwardly from the bottom 10 to an upper end 14 of the impingement pot 1. The inner surface 12i of the wall 12 and the upper impingement surface 10s of the bottom 10 define an inner space 16 having an inlet / outlet 18 for the melt at the upper end 14. As an example, the opening 18 in these figures is rectangular.

[0067] Figures 1a to 9a A cross-sectional cut of an impingement pot 1 is respectively shown, wherein the impingement pot 1 is cut in half. Figures 1b to 9b Each shows the corresponding Figures 1a to 9a The same cross-sectional cut of the impingement pot 1, wherein a quarter of the impingement pot 1 is cut away at the corner, so that the two sections of the wall 12 are cut into two halves. Of course, Figures 1a to 9a and Figures 1b to 9b These cutouts are just for easier depiction.

[0068] The circumferential direction h is defined horizontally, i.e., along the circumference of the inner surface 12i of the wall 12, and points clockwise from an upper perspective. In addition, the protrusion direction p is defined vertically from the inner surface 12i into the interior space 16, and the vertical direction v is defined from the impact surface 10s of the bottom 10 to the upper edge 14 of the wall 12.

[0069] The bottom 10 and the corresponding impact surface 10s shown in FIGS. 1 to 9 are rectangular in shape only as an example, whereas the bottom 10 may have any shape, such as trapezoidal, triangular, circular, elliptical, etc., wherein the edges may also be rectangular, have another angle or may be rounded, etc. Furthermore, the impact surface 10s does not necessarily have to have the same shape as the bottom 10, since, for example, the wall 12 may have a different thickness.

[0070] Exemplary dimensions of the rectangular impact surface 10s may be 520 x 720 mm or 220 x 250 mm or any other dimensions. The wall 12 is preferably vertical, i.e. intersecting the impact surface 10s of the bottom 10 at an angle of 90 degrees, but may also be inclined upwards or downwards, preferably outwardly inclined at an angle of 7 to 10 degrees. The angle of inclination of the wall 12 may be selected to match the upward inclination angle of the wall of the tundish to be used with the impact tank 1. Furthermore, the impact surface 10s may be structured and / or include segments that are inclined upwards and / or downwards. The upper end 14 of the impact tank 1 is preferably closed along the circumference of the wall 12, as shown, but may also have gaps and / or slits and / or other contours. The upper end 14 of the impact tank 1 may also have segments that are inclined upwards or downwards in the circumferential direction h. Preferably, the inner surface 12i of the wall 12 has a height from 225 mm to 300 mm. The wall 12 may be closed as shown, or may also include through holes.

[0071] The impact pot 1 shown in Figures 1 to 9 includes a plurality of horizontal barriers 2, which extend from the inner surface 12i of the wall 12 into the inner space 16 in the protruding direction p, and a plurality of vertical barriers 3, which extend from the inner surface 12i of the wall 12 into the inner space 16 in the protruding direction p, wherein the vertical barriers 3 are arranged below the plurality of horizontal barriers 2 adjacent to the corresponding vertical barriers 3. The plurality of horizontal barriers 2 have an upper surface 2u, a lower surface 2c, and may have a front surface 2f.

[0072] The barrier can be defined by its horizontal dimension (in the circumferential direction h), its vertical dimension (in the vertical direction v) and its protruding dimension (in the protruding direction p). In the present disclosure, the vertical barrier 3 is defined as a barrier having at least a portion of a vertical dimension greater than a horizontal dimension, and the horizontal barrier 2 is defined as a barrier having at least a portion of a horizontal dimension greater than a vertical dimension. Preferably, the vertical barrier 3 has an overall vertical dimension greater than a horizontal dimension, and the horizontal barrier 2 has an overall horizontal dimension greater than a vertical dimension, as disclosed in the figure.

[0073] FIG1 shows an impact tank 1 having a horizontal barrier 2 in the form of a projecting lip, wherein the horizontal barrier 2 is advantageously located at the upper end 14 of the wall 12. The horizontal barrier 2 has an upper surface 2u located in the vertical direction v as defined herein, a front surface 2f located toward the interior space 18 (i.e., in the protruding direction p) and a lower surface 2u located toward the impact surface 12s (i.e., against the vertical direction v as defined herein). Here, the upper surface 2u is part of the upper end 14 of the wall 12, but may also be vertically at a distance from the lower end 14 of the wall 12.

[0074] The front surface 2f may also be omitted if the upper surface 2u and the lower surface 2c meet at an angle. The horizontal barrier 2 may also be interrupted and / or arranged at a distance from the upper end 14 of the wall 12 .

[0075] In addition, a plurality of vertical barriers 3 (e.g., in the shape of a cuboid) are arranged to be vertically separated from the horizontal barrier 2 by a vertical gap. The vertical gap may also vary along the circumferential direction h, depending on the shape and position of the corresponding vertical barrier 3 and / or the corresponding horizontal barrier 2. The vertical barrier 3 has an upper surface 3u located in the vertical direction v as defined herein, a front surface 3f positioned toward the inner space 18 (i.e., in the protruding direction p), and side surfaces 3s in the circumferential direction h and opposite to the circumferential direction h, i.e., a side surface 3s in the clockwise direction and a side surface 3s in the counterclockwise direction. Since the vertical barrier 3 is in the shape of a cuboid, the upper surface 3u of the vertical barrier 3 is flat, i.e., it is neither inclined upward nor downward in the circumferential direction h or the protruding direction p, and the side wall 3s of the vertical barrier intersects the inner surface 12i of the wall 12 of the impact tank 1 at a side wall angle α of 90 degrees. This side wall angle α describes an “external angle”, ie an “inner angle” as viewed from within the interior space 16 , rather than from within the vertical barrier 3 .

[0076] Since the vertical barrier 3 is cuboid, it has a cuboid base. The vertical barrier 3 shown here abuts on the bottom 10. If the vertical barrier 3 does not abut on the bottom 10, it may include a rectangular lower surface oriented toward the impact surface 12s (ie, against the vertical direction v as defined herein).

[0077] Adjacent vertical barriers 3 are arranged with a horizontal gap G3 therebetween in the circumferential direction h, see the horizontal gap G3 in Figure 10. Of course, the horizontal gap G3 may vary.

[0078] FIG. 2 shows an impact tank 1, in which a plurality of horizontal barriers 2 and a plurality of vertical barriers 3 are provided, wherein the plurality of vertical barriers 3 are at least partially arranged in a horizontal gap G2 (see FIG. 10 ) of adjacent horizontal barriers 2. The horizontal barriers 2 (and the vertical barriers 3) have, for example, a rectangular parallelepiped shape. Therefore, the upper surface 2u of the horizontal barrier 2 and the upper surface 3u of the vertical barrier 3 are flat, i.e., they are neither inclined upward nor downward in the circumferential direction h or the protruding direction p, and the side walls 3s of the vertical barrier 3 and the side walls 2s of the horizontal barrier 2 intersect the inner surface 12i of the wall 12 of the impact tank 1 at a side wall angle α of 90 degrees.

[0079] It is particularly preferred if the vertical barriers 3 and / or the horizontal barriers 2 have a side wall angle α of 75-105 degrees, more preferably 80-100 degrees, most preferably 90-95 degrees.

[0080] Figure 3 shows the impact can 1 of Figure 2, wherein the vertical barrier 3 is arranged on a ridge on the impact surface 10s extending alongside the inner wall 12i of the impact can 1. The ridge may be considered as part of the bottom 10, wherein the vertical barrier 3 is arranged on the bottom 10.

[0081] 4 shows the impact pot 1 of FIG. 2 , wherein the side wall 3s of the vertical barrier 3 intersects the inner surface 12i of the wall 12 of the impact pot 1 at a side wall angle α of 95 degrees (for easier illustration, reference symbol α is indicated only at one vertical barrier 3 ).

[0082] FIG5 shows an impact tank 1 having a plurality of horizontal barriers 2 having an upper surface 2u that is alternately inclined upward and downward in a circumferential direction h to produce an inverted V shape, in other words, the plurality of horizontal barriers 2 are arranged in a roof-like shape. As shown in one embodiment, the leg angle β between the upwardly inclined section and the downwardly inclined section of the upper surface 2u is 135 degrees. The leg angle β can be selected to be between >45 degrees and <170 degrees, with a preferred lower value of >90 degrees and a preferred upper value of <140 degrees. The transition area between the upwardly inclined section and the downwardly inclined section of the upper surface 2u can also be curved. For example, the upwardly inclined section and the downwardly inclined section of the upper surface 2u have the same length.

[0083] 6 shows the impact pot of FIG. 5 , wherein, as in FIG. 4 , the side wall 3s of the vertical barrier 3 intersects the inner surface 12i of the wall 12 of the impact pot 1 at a side wall angle α of 95 degrees, so that the vertical barrier 3 has a trapezoidal base.

[0084] FIG. 7 shows the impingement pot 1 of FIG. 6 , but with the upper surface 3 u being inclined in the protrusion direction p.

[0085] FIG. 8 shows the impact pot of FIG. 6 , but the upper surface 3 u of the vertical barrier 3 is inclined upwards and downwards in the circumferential direction h in the manner of a roof, similar to the upper surface 2 u of the horizontal barrier 2 .

[0086] FIG. 9 shows the impact pot of FIG. 6 , but the upper surface 3 u of the vertical barrier 3 is convexly curved in the circumferential direction h.

[0087] If a plurality of horizontal barriers 2 are provided, the vertical barriers 3 are at least partially positioned in the horizontal gaps G2 between adjacent horizontal barriers 2. Adjacent vertical barriers 3 are also arranged to have a horizontal gap G3 in the circumferential direction h. As an example only, the impact tank 1 shown in Figures 2 to 9 includes horizontal barriers 2 and vertical barriers 3 that are alternately positioned along the circumference of the inner surface 12i of the wall 12. In addition, a plurality of vertical barriers 3 may be at least partially arranged in the horizontal gaps G2 between adjacent horizontal barriers 2, and / or a plurality of horizontal barriers 3 may be at least partially arranged in the horizontal gaps G3 between adjacent vertical barriers 3. For a clearer description, reference symbols for the horizontal gaps G2 between the horizontal barriers 2 and the horizontal intervals G3 between the vertical barriers are not shown in Figures 1 to 9, but these reference symbols are shown with reference to Figure 10. In the embodiment shown in Figures 1 to 9, the vertical barriers 3 are arranged adjacent to the impact surface 10s. All or some of the vertical barriers 3 may also be arranged at a distance from the impact surface 10s, preferably at most 40 mm. All or some of the vertical barriers 3 may also be arranged at the same distance from the impact surface 10s.

[0088] Furthermore, in the embodiments shown in FIGS. 1 to 9 , the front surface 3 f of the vertical barrier 3 is, for example, parallel to a plane spanned by the circumferential direction h and the vertical direction v (which in these embodiments means that the surface 3 f is parallel to the inner surface 12 i of the side wall 12), and thus intersects the impact surface 10 s at a side wall angle α of 90 degrees. Furthermore, the front surface 2 f of the horizontal barrier 2 is, for example, parallel to a plane spanned by the circumferential direction h and the vertical direction v. Of course, the front surface 3 f of the vertical barrier 3 and / or the front surface 2 f of the horizontal barrier 2 may also have another orientation, structure, etc.

[0089] In the embodiments shown in Figures 2 to 9, the horizontal barriers 2 are arranged at the same vertical distance from the upper end 14 of the impact pot 1. The horizontal barriers 2 may also be arranged at different distances from the upper end 14 of the impact pot 1. Preferably, the horizontal barriers 2 are arranged at least 5 mm and / or at most 40 mm from the upper end 14.

[0090] Fig.10a , Fig.10b , Fig.10c The inner surface 12i of the wall 12 is shown, wherein three different arrangements of a plurality of vertical barriers 3 and a plurality of horizontal barriers 2 are depicted. The circumferential direction h, the vertical direction v and the protrusion direction p are shown, the protrusion direction pointing to the observer, and the horizontal barriers 2 are configured as an inverted V shape only as an example. The vertical barriers 3 are configured as a cuboid only as an example, as depicted in FIG. 5 . The plurality of vertical barriers 3 are arranged with a horizontal gap G3 in the circumferential direction h, and the horizontal vertical barriers 2 are also arranged with a horizontal spacing G2 in the circumferential direction h. The vertical barriers 3 are arranged below the adjacent horizontal barriers 2.

[0091] exist Fig.10a 5 , the vertical barriers 3 are neither at a distance from nor overlap with all horizontal barriers 2 adjacent to the corresponding vertical barrier in the circumferential direction h (indicated by the vertical dashed lines), as depicted in FIG. 5 . Fig.10b The same arrangement is shown, wherein the vertical barriers 3 are spaced in the circumferential direction h from the horizontal barriers 2 adjacent to the respective vertical barriers so as to leave a horizontal gap G1 (indicated by a vertical dashed line) therebetween, wherein Fig.10c , the vertical barriers 3 overlap with all horizontal barriers 2 adjacent to the corresponding vertical barriers in the circumferential direction h, which is also indicated by the vertical dotted line. Of course, it is also possible that only some of the vertical barriers 3 overlap or are at a certain distance from all or only some of the adjacent horizontal barriers 2 in the circumferential direction h; or, it is also possible that only some of the vertical barriers 3 are neither at a certain distance from nor overlap all or some of the adjacent horizontal barriers 2 in the circumferential direction h. It is also possible that all vertical barriers 3 overlap or are at a certain distance from all or only some of the adjacent horizontal barriers 2 in the circumferential direction h; or, all vertical barriers 3 are neither at a certain distance from nor overlap only some of the adjacent horizontal barriers 2 in the circumferential direction h.

[0092] Although exemplary arrangements are shown in FIGS. 2 to 9 , in each case, the vertical barrier 3 may be (a) at a distance from an adjacent horizontal barrier 2 , or (b) overlapping an adjacent horizontal barrier 2 , or (c) neither at a distance from nor overlapping an adjacent horizontal barrier 2 .

[0093] The vertical barrier 3 and / or the horizontal barrier 2 may be components of an adjacent wall.The horizontal barrier 2 may have a lower surface 2c parallel to the horizontal plane, or have a lower surface 2c parallel to the upper surface.

[0094] Preferably, the vertical barrier 3 protrudes into the interior space 16 in the protrusion direction p by 5%-15% relative to the length of the inner surface of the wall 12, preferably at least 10 mm and / or at most 75 mm. The vertical barrier 3 may have a height of 25%-60% relative to the height of the inner surface of the adjacent wall 12. The horizontal barrier 2 may extend into the interior space 16 in the protrusion direction p by at least 10 mm and / or at most 75 mm.

[0095] The vertical barrier 3 has an upper surface extending mainly in the circumferential direction h and in the protruding direction p.

[0096] Although the vertical barrier 3 is located below the adjacent horizontal barrier 2, the vertical barrier 3 that is not adjacent to the horizontal barrier 2 (because it is located on another section of the wall or on the same wall section, but is not the next vertical barrier in the circumferential direction h, i.e., not adjacent) may also be located above the non-adjacent barrier. It is preferred when the vertical barrier 3 of a section of the wall 12 (e.g., on one side of the impact pot 1 having a polygonal (e.g., rectangular) shaped impact surface 10s) is located below all horizontal barriers 2 of the wall section, and it is even more preferred when the vertical barrier 3 is located below all horizontal barriers 2, as shown in FIGS. 1 to 9.

[0097] Computer simulations and water modeling experiments have shown that the impingement tank 1 with vertical barriers 3 and horizontal barriers 2 as disclosed herein reduces the velocity of the metal flow, reduces the turbulence within the impingement tank 1, reduces the surface velocity and surface turbulence within the corresponding metallurgical vessel, compared to all types of prior art devices as described above. This indicates a more efficient energy dissipation within the impingement tank 1. In addition, a more uniform distribution of the metal flow in the tundish is achieved while minimizing the residence time differences between the strands, especially in case of shroud misalignment.

[0098] The metal poured into the impingement pot 1 hits the impingement surface 10s. Any metal stream flowing upward inside the impingement pot 1 (in its internal space 16) near a section of the wall 12 is guided by the corresponding vertical barrier 3 and hits the lower surface 2c of the corresponding horizontal barrier 2, thereby turning inward (into the internal space 16) and then leaving the impingement pot upward through the opening 18. If the metal is poured into the impingement pot 1 in an eccentric position so that it collides with the upper surface 2u of the horizontal barrier 2 and / or the upper surface 3u of the vertical barrier 3 during pouring, the upward and / or downward inclination of the upper surfaces 2o and / or 3u will deflect the incoming jet towards the internal space 16 of the impingement pot, thereby avoiding the upward splashing of metal droplets.

[0099] Fig.11a Simulation results for an impact tank with multiple inverted “V” shaped horizontal barriers are shown. For illustration reasons, a top front view is chosen, where only the impact surface and one wall segment are shown and reference symbols are omitted. Streamlines of the molten metal are depicted, where arrows indicate the flow direction. While this design works fairly well in dissipating incoming kinetic energy and reducing turbulence, misaligned ladle shrouds or nozzles can still cause liquid metal to flow unevenly out of the impact tank. Typically, the metal flow will drift to the side opposite to the direction of the misalignment because this is the path of least resistance. As shown in Figure 11, liquid metal pours right into impact tank 1 from an off-center position, where the metal flow drifts to the upper left. This upward flow directed to the side also attracts some flows from nearby, which are represented by the streamlines entering from the upper right corner.

[0100] Fig.11b The simulation results of the impact tank 1 are shown in Figure 5. Fig.11a The same top front view as in Fig.11a As in the case of liquid metal flow, the flow is indicated by streamlines, with arrows indicating the direction of flow. Fig.11a The liquid metal stream is poured into the impact tank 1 in the same eccentric manner as depicted in FIG. After impact, the liquid metal stream initially flows parallel to the impact surface 12s toward the opposite side of the eccentric jet position. The vertical barrier 3 intercepts the metal stream horizontally, breaks the horizontal velocity component, and guides the metal stream upward against the lower surface 2c of the horizontal barrier 2. The collision between the horizontal metal stream and the vertical barrier may generate some vortices at the bottom between the adjacent vertical barriers. This occurs due to the forced change in flow direction and is generated when there are obstacles in the flow path. Such vortices help to ensure that the incoming flows remain within the corresponding vertical channels and that these flows are forced to flow upward rather than flowing out of the vertical channels horizontally. When the metal stream is directed upward and collides with the horizontal barrier 2, local turbulence is generated, which causes the mixing and homogenization of the velocities of the different vertical flows. These flows then follow the path defined by the gap G2 between the horizontal barriers 2 and are evenly distributed to the tundish from there at a uniform speed and in all directions without drifting to either side. Other embodiments of impact cans 1 having multiple vertical barriers 3 and multiple horizontal barriers 2 according to the present disclosure have also shown similar results.

[0101] exist Fig.12, the flow at the rear section of the wall 12 is shown in more detail (including more streamlines), wherein different flow regions A, B, C, D, E, F are defined, and other reference symbols are omitted to better depict the streamlines. The upper opening region A refers to the region flowing out from the upper opening 18; the transition region B refers to the transition region between the vertical barrier 3 and the horizontal barrier 2; the lower regions C, D, E and F refer to the gaps between adjacent vertical barriers 3. The flow is strongest in the lower region E, wherein the flow in the lower regions C, D and F is relatively weaker. This is due to the incoming liquid metal flow hitting the impact surface 10s on the right side, and therefore close to the lower region E. The lower region F is closer to the impact region of the liquid metal flow, but closer to the right wall section, and behind the vertical barrier (not shown) located at the right wall section of the impact tank, so the flow is weaker. The vertical barrier 3 directs the flow to the horizontal barrier 2. Therefore, the vertical barrier 3 increases the effectiveness of the horizontal barrier 2, as can be seen in the transition region B. The horizontal barrier 2 promotes mixing between the flows of adjacent vertical channels (established in the gap G3 between two adjacent vertical barriers 3). This allows the flow between the different vertical channels to be equalized: if, due to asymmetric flows, one vertical channel has a stronger flow than an adjacent channel, the turbulence caused by the collision of this flow with the horizontal barrier 2 will equalize these flows and thereafter make them uniformly distributed. Therefore, even when the flow between the different lower areas C, D, E, F varies greatly, the horizontal barrier 2 increases the effectiveness of the vertical barrier 3 in reducing the asymmetry that causes a uniform flow in the upper opening area A. At the location where the molten metal flow collides with an obstacle or an opposing flow stream, vortices may be generated. This can be achieved in a very short time. Fig.12 It is observed in the region between the vertical and horizontal barriers in the , where the opposing flows are mixing. The vortices further enhance the equalization effect and help reduce the velocity differences between adjacent vertical channels.

Claims

1. A fire-resistant impact tank (1), comprising a bottom (10) having an impact surface (10s), a wall (12) having an inner surface (12i), the wall (12) extending upward from the bottom (10) to an upper end (14) of the impact tank (11), the impact surface (10s) and the inner surface (12i) of the wall (12) defining an inner space (16), wherein: A plurality of horizontal barriers (2) are provided, and the plurality of horizontal barriers (2) extend from the inner surface (12i) of the wall (12) into the internal space (16) in a protruding direction (p), characterized in that a plurality of vertical barriers (3) are provided, and the plurality of vertical barriers extend from the inner surface (12i) of the wall (12) into the internal space (16) in a protruding direction (p), wherein the plurality of vertical barriers (3) are arranged below the plurality of horizontal barriers (2) adjacent to the corresponding vertical barriers.

2. The fire-resistant impact tank according to claim 1, characterized in that: The plurality of horizontal barriers (2) have an upper surface (2u), and the upper surface includes one or more of the following shapes and orientations: inclined upward in the protruding direction (p), inclined downward in the protruding direction (p), neither inclined upward nor downward in the protruding direction (p), curved in the circumferential direction (h) of the inner surface (12i), inclined upward in the circumferential direction (h) of the inner surface (12i), inclined downward in the circumferential direction (h) of the inner surface (12i), and neither inclined upward nor downward in the circumferential direction (h) of the inner surface (12i).

3. The fire-resistant impact tank according to any one of claims 1 and 2, characterized in that: The vertical barrier (3) has an upper surface (3u), which includes one or more of the following shapes and orientations: inclined upward in the protruding direction (p), inclined downward in the protruding direction (p), neither inclined upward nor downward in the protruding direction (p), curved in the circumferential direction (h) of the inner surface (12i), inclined upward in the circumferential direction (h) of the inner surface (12i), inclined downward in the circumferential direction (h) of the inner surface (12i), and neither inclined upward nor downward in the circumferential direction (h) of the inner surface (12i).

4. The fire-resistant impact tank according to any one of claims 1 to 3, characterized in that: The side walls (3s) of the vertical barrier (3) are planar, preferably perpendicular to the impact surface (10s) of the bottom (10).

5. The fire-resistant impact tank according to any one of claims 1 to 4, characterized in that: The side wall (3s) of the vertical barrier (3) intersects the inner surface (12i) at an angle of 75-105 degrees, preferably 80-100 degrees, most preferably 90-95 degrees.

6. The fire-resistant impact tank according to any one of claims 1 to 5, characterized in that: The amount of extension of the plurality of vertical barriers (3) into the internal space (16) is 5%-15% of the size of the internal space (16) in the protruding direction (p) of the corresponding vertical barriers (3).

7. The fire-resistant impact tank according to any one of claims 1 to 6, characterized in that: The plurality of vertical barriers (3) extend into the interior space (16) by at least 10 mm and / or at most 75 mm.

8. The fire-resistant impact tank according to any one of claims 1 to 7, characterized in that: The height of the plurality of vertical barriers (3) is 25%-70%, preferably 25%-60%, of the height of the inner surface (12i) of the adjacent wall (12).

9. The fire-resistant impact tank according to any one of claims 1 to 8, characterized in that: The plurality of vertical barriers (3) are arranged adjacent to the impact surface (10s).

10. The fire-resistant impact tank according to any one of claims 1 to 9, characterized in that: The several horizontal barriers (2) are arranged at a distance from the upper end (14) of the impact can (1), the distance preferably being at least 5 mm and / or at most 40 mm.

11. The fire-resistant impact tank according to any one of claims 1 to 10, characterized in that: The amount of extension of the plurality of horizontal barriers (2) into the internal space (16) is 2.5% to 15% of the size of the internal space (16) in the protruding direction (p) of the corresponding horizontal barriers (2).

12. The fire-resistant impact tank according to any one of claims 1 to 11, characterized in that: The plurality of horizontal barriers (2) extend into the inner space (16) by at least 5 mm and / or at most 75 mm.

13. The fire-resistant impact tank according to any one of claims 1 to 12, characterized in that: The plurality of vertical barriers (3) overlap the plurality of horizontal barriers (2) adjacent to the corresponding vertical barriers (3) in the circumferential direction (h) of the inner surface (12i).

14. The fire-resistant impact tank according to any one of claims 1 to 12, characterized in that: The plurality of vertical barriers (3) are spaced apart from the plurality of horizontal barriers (2) adjacent to the corresponding vertical barriers (3) in the circumferential direction (h) of the inner surface (12i).

15. The fire-resistant impact tank according to any one of claims 1 to 12, characterized in that: The plurality of vertical barriers (3) are arranged such that they are neither spaced apart from nor overlapped with the plurality of horizontal barriers (2) adjacent to the corresponding vertical barriers (3) in the circumferential direction (h) of the inner surface (12i).

16. The fire-resistant impact tank according to any one of claims 1 to 15, characterized in that: The plurality of vertical barriers (3) and / or the number of horizontal barriers (2) are integral parts of the adjacent wall (12).

17. The fire-resistant impact tank according to any one of claims 1 to 16, characterized in that: A plurality of horizontal barriers (2) are provided, wherein the plurality of vertical barriers (3) are at least partially arranged in horizontal gaps (G2) between horizontal barriers (2) adjacent to respective vertical barriers (3).

18. The fire-resistant impact tank according to claim 17, characterized in that: The plurality of horizontal barriers (2) and the plurality of vertical barriers (3) are alternately positioned along the circumference of the inner surface (12i) of the wall (12).

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