Collision pot with vertical and horizontal barriers

Abstract

To improve the flow characteristics of a metal melt poured into the impingement pot (1), particularly with respect to off-center and / or angled pouring of the melt, the impingement pot (1) comprises a bottom (10) having an impingement surface (10s) and a wall (12) having an inner surface (12i), the wall (12) extending upward from the bottom (10) to an upper end (14) of the impingement pot (11), and the inner surface (12i) of the wall (12) and the impingement surface (10s) define an internal space. The impingement pot (1) defines an inner space (16) and includes several horizontal barriers (2), the several horizontal barriers (2) protruding from the inner surface (12i) of the wall (12) into the inner space (16) in a protruding direction (p), and the impingement pot (1) further includes a plurality of vertical barriers (3) protruding from the inner surface (12i) of the wall (12) into the inner space (16) in the protruding direction (p), the several vertical barriers (3) being arranged below the several horizontal barriers (2) adjacent to each vertical barrier.

Description

[Technical Field]

[0001] The present disclosure relates to a heat-resistant collision pot having a bottom with a collision surface and a wall with an inner surface, the wall extending upward from the bottom to an upper end of the collision pot, the inner surface of the wall and the collision surface defining an inner space, and several horizontal barriers provided, the several horizontal barriers protruding in a protruding direction from the inner surface of the wall into the inner space. [Background technology]

[0002] Refractory (i.e., refractory) impingement pots, also called impingement pads, for metallurgical vessels such as tundishes typically have a tub-like shape including a bottom with an upper impingement surface and a wall with an inner surface. The wall extends upward from the bottom to the upper end of the impingement pot. The inner surface of the wall and the bottom impingement surface define a central interior space of the impingement pot.

[0003] Liquid metal is injected into a metallurgical vessel, and an impingement pot is placed therein to reduce turbulence and splashing of the metal melt during and after injection. Various structural modifications have been made to common types of impingement pots to further improve turbulence and splashing behavior. International Publication WO 95 / 13890 discloses an annular section extending inward and upward toward the upper circumferential end of the impingement pot. International Publication WO 03 / 082499 discloses one or more sections of the upper circumferential end of the impingement pot supporting so-called overhangs that protrude inward into the central space of the impingement pot. International Publication WO 2012 / 012853 discloses a rectangular-shaped barrier on the inner surface of the wall, while the bottom impingement surface is corrugated. EP 2769785 discloses an inverted "V" or "W"-shaped barrier on the inner surface of the wall, thereby further reducing turbulence.

[0004] All known impingement pot configurations have problems dealing with misalignment of the ladle shroud (or similar nozzle) that delivers the metal melt to the impingement pot. Off-center and / or angled pouring of the metal melt due to a misaligned ladle shroud or nozzle can result in splashing of the metal melt at the start of the casting process as well as unfavorable flow patterns during steady-state casting, resulting in reduced product quality. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 95 / 13890 [Patent Document 2] International Publication No. 03 / 082499 [Patent Document 3] International Publication No. 2012 / 012853 [Patent Document 4] European Patent No. 2769785 Summary of the Invention [Problem to be solved by the invention]

[0006] It is therefore an object to provide an impingement pot that further improves the flow characteristics of a metal melt injected into said impingement pot, particularly with respect to off-center and / or angled injection of the melt. [Means for solving the problem]

[0007] This object is achieved by providing an impingement pot with a plurality of vertical barriers projecting from the inner surface of the wall into the interior space in a protruding direction, the plurality of vertical barriers being arranged below several horizontal barriers adjacent to each vertical barrier, and a vertical channel may be defined by side walls of two adjacent vertical barriers and corresponding side walls of the impingement pot.

[0008] A vertical barrier being located below an adjacent horizontal barrier means that the center of mass of the vertical barrier is located below the center of mass of the adjacent horizontal barrier. "Below" can also be considered as closer to the bottom or further from the top.

[0009] "Several" means "at least one," and "plurality" means "at least two." Also, "adjacent" is considered to be adjacent (or in other words, consecutive or continuous), but separated by a distance, i.e., not abutting. Thus, a vertical barrier is, by definition, vertically spaced apart from an adjacent horizontal barrier. A vertical barrier may be located below an adjacent horizontal barrier, but a vertical barrier that is not adjacent to said horizontal barrier (such vertical barriers being located in different sections of the wall or in the same wall section, but not the next vertical barrier circumferentially, i.e., not adjacent) may be located (partially or wholly) above said non-adjacent horizontal barrier.

[0010] It is preferred if the vertical barriers of one wall section (e.g., one side of an impingement pot with a polygonal, e.g., rectangular, impingement surface) are positioned below all horizontal barriers of said wall section. This results in symmetrical flow behavior in this wall section. It is even more preferred if multiple vertical barriers are positioned below all horizontal barriers. This results in symmetrical flow on all sides of the wall.

[0011] Impingement pots may be used in metallurgical vessels, such as tundishes, to reduce turbulence and splashing of liquid metal melt poured into the vessel during and after pouring.

[0012] The symmetrical flow of liquid metal within the impingement pot results in a symmetrical flow downstream within the tundish, which provides several advantages to the process, such as uniform temperature and composition between different strands, resulting in improved removal of non-metallic inclusions by flotation, higher residence time, reduced tendency for vortex formation within the strands, reduced risk of slag contamination in the mold and mold level fluctuations, reduced wall shear stress on the refractory lining, resulting in improved refractory life, and less turbulence at the slag interface, resulting in a lower risk of re-oxidation of the steel bath. It has been found that the use of several horizontal and multiple vertical barriers disclosed herein allows liquid metal injected into the impingement pot to be uniformly distributed inside the tundish in which such an impingement pot is located. This also applies when the liquid metal stream is injected into the impingement pot at a non-orthogonal angle onto the impingement surface and / or when the liquid metal stream is offset from the center of the impingement pot. This effect is achieved by at least one horizontal barrier and multiple vertical barriers positioned below each adjacent horizontal barrier acting as diffusers for the metal flow injected into the impingement pot and exiting the impingement pot into the surrounding tundish. When liquid metal is injected in an offset direction away from the center of the impingement pot, the liquid metal may tend to exit the impingement pot on the side opposite the offset direction because this is the path of least resistance. This causes uneven distribution of the liquid metal flow within the tundish. Because multiple vertical barriers are positioned below each vertical barrier and several adjacent horizontal barriers, the liquid metal flow is uniformly distributed across the entire cross-section of the impingement pot. The main effects and benefits of the vertical barriers are (1) breaking up potentially asymmetric horizontal velocity components of the liquid metal flow and (2) promoting upward flow across the entire horizontal cross-section of the impingement pot, avoiding the strong upward flow concentrating only on the opposite side associated with an off-center incoming liquid metal jet.However, vertical barriers cannot completely homogenize the flow because different vertical channels (between adjacent vertical barriers) may have different vertical flow velocities due to their different locations relative to the liquid metal jet impingement region. To achieve a properly symmetrical flow, it is desirable for the vertical velocity of the liquid metal flow in a given vertical channel to be neither higher nor lower than the average upward liquid metal flow velocity. Liquid metal flowing upward through a vertical channel impinges on a horizontal barrier located above it (adjacent to the vertical barrier that bounds the vertical channel), resulting in the following benefits: (1) homogenization of the flow velocity between adjacent vertical channels due to the mixing generated when the flows from adjacent vertical channels are forced against each other after impinging on the horizontal barrier located above; and (2) dissipation of the flow kinetic energy caused by the longer path the fluid needs to travel around the horizontal barrier after impinging on it. Therefore, vertical barriers significantly enhance the functionality of horizontal barriers by directly directing the flow against them. On the other hand, horizontal barriers equalize the different vertical velocities in different vertical channels to avoid flow asymmetry. The collision of the vertical liquid metal flow with an upper horizontal barrier may also have the effect of promoting small localized turbulence, which helps achieve the above effect. The combination of both vertical and horizontal barriers as disclosed herein results in a uniform flow from the impingement pot into the tundish, even under unfavorable conditions of severe misalignment of the ladle shroud or nozzle. According to this disclosure, several horizontal barriers combined with multiple lower vertical barriers effectively equalize both the distribution of the incoming steel within the tundish and the dissipation of its kinetic energy. This effect is achieved even under unfavorable conditions of severe misalignment of the incoming liquid metal jet.

[0013] The vertical barrier and the adjacent horizontal barrier do not abut in the sense that there are some openings through which the incoming flows from the adjacent vertical channels can mix and equalize after impinging on the horizontal barrier.

[0014] The circumferential direction extends horizontally along the inner surface clockwise when viewed from the top surface. The vertical direction is considered to be oriented perpendicularly from the bottom impact surface to the top end of the wall. If the inner surface of the wall is perpendicular to the bottom impact surface, the vertical direction is parallel to the inner surface of the wall. The protruding direction is considered to be oriented perpendicularly from the inner surface of the wall into the internal space of the impact pot. If the inner surface of the wall is perpendicular to the bottom impact surface, the protruding direction is parallel to the bottom impact surface. A barrier can be defined by its horizontal dimension, its vertical dimension, and its protruding dimension. The horizontal dimension is the circumferential dimension, the vertical dimension is the vertical dimension, and the protruding dimension is the dimension in the protruding direction.

[0015] In this disclosure, a vertical barrier is defined as a barrier having at least a portion where the vertical dimension is greater than the horizontal dimension, and a horizontal barrier is defined as a barrier having at least a portion where the horizontal dimension is greater than the vertical dimension. A vertical barrier can also be defined as a barrier whose bounding box has a vertical dimension greater than the horizontal dimension. A bounding box is the smallest rectangular box that can completely accommodate the barrier. Preferably, a vertical barrier has an overall vertical dimension greater than the horizontal dimension, and / or a horizontal barrier has a horizontal dimension greater than the vertical dimension. Preferably, a vertical barrier has a vertical dimension at least 10% greater, preferably 25% greater, and most preferably 50% greater than its horizontal dimension. Preferably, a horizontal barrier has a horizontal dimension at least 10% greater, preferably 25% greater, and most preferably 50% greater than its vertical dimension.

[0016] The upper end of the impingement pot can be closed along the periphery of the wall or can have gaps and / or slits and / or other contours (such as those disclosed in EP 2418032). Holes can also be provided through the wall to push the liquid metal flow toward areas of the tundish that might otherwise have lower temperatures or stagnate. This is particularly advantageous in tundish configurations with multiple strands, where strands located away from the impingement pot may receive lower temperature steel compared to strands located closer to the impingement pot. In such situations, holes in the wall of the impingement pot can be useful for directing a portion of the higher temperature incoming flow toward these distant areas.

[0017] If exactly one horizontal barrier is used, this horizontal barrier may be provided along the entire periphery or part of the periphery of the inner wall as a lip or overhang.

[0018] Preferably, multiple horizontal barriers are provided, and multiple vertical barriers are at least partially disposed within the horizontal gap between each vertical barrier and an adjacent horizontal barrier. "Adjacent" is defined as adjacent but not abutting, so that the vertical barriers are vertically spaced apart from adjacent horizontal barriers. By providing multiple horizontal barriers, turbulence of the metal melt is further reduced. Multiple horizontal barriers allow a vertical channel (within the horizontal gap between two adjacent vertical barriers) to have its associated horizontal barrier located above it, which increases the synergistic effect of the vertical and horizontal barriers to dissipate kinetic energy and uniform the flow.

[0019] It is advantageous to arrange a plurality of horizontal barriers alternating with a plurality of vertical barriers along the periphery of the inner surface of the wall, whereby the total kinetic energy of the incoming liquid metal jet is distributed among the different vertical and horizontal barriers located along the periphery, with each vertical channel having its associated horizontal barrier located above it, further enhancing the above advantages.

[0020] The horizontal gap between adjacent horizontal barriers also increases the overall cross section of the impingement pot opening compared to a situation where there is no horizontal gap. The larger horizontal cross section of the impingement pot opening allows for a more diffused flow from the impingement pot to the tundish. When the liquid metal flows through a larger area, its average velocity is consequently lower, thereby increasing residence time and reducing undesirable turbulence within 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.

[0021] The several horizontal barriers may have upper surfaces with one or more of the following shapes and orientations: inclined in the protruding direction, descending in the protruding direction, neither inclined nor descending in the protruding direction, curved in the horizontal circumferential direction of the inner surface, inclined in the circumferential direction of the inner surface, descending in the circumferential direction of the inner surface, and neither inclined nor descending in the circumferential direction of the inner surface. Descending means that the upper surface descending in the protruding direction descends so as to approach the bottom impact surface (assuming the inner surface is perpendicular to the bottom impact surface), and inclined means that the protruding, inclined upper surface rises in this way, and is spaced apart from the bottom upper surface. When the inner surface of the wall is at a non-perpendicular angle to the bottom impact surface, the protruding direction is non-parallel to the impact surface, and it is preferable if the upper surfaces of the several horizontal barriers are inclined or descended in the protruding direction so as to be parallel to the bottom impact surface and / or the horizontal plane (the bottom may be inclined or descended from the horizontal plane).

[0022] It is most preferable if the upper surface of the horizontal barrier is lowered in the protruding direction. This means that when the inner surface of the wall is perpendicular to the upper collision surface of the bottom, the upper surface is close to the collision surface of the bottom. When the inner surface of the wall is not perpendicular to the upper collision surface of the bottom, it is also preferable that the upper surface is lowered so as to be close to the collision surface of the bottom. The lowering of the upper surface is beneficial when an off-center liquid metal jet impinges on the upper surface of the horizontal barrier. Compared to an upper surface of the horizontal barrier that is not lowered in the protruding direction, the lowered upper surface has the advantage of directing the inflow flow that hits the upper surface toward the inner space of the collision pot, thereby reducing splashing.

[0023] It is particularly advantageous for some horizontal barriers to have alternating circumferentially inclined and descending upper surfaces on their inner surfaces, where descending again means that the circumferentially descending upper surfaces descend towards the bottom, and inclined again means that such an ascending upper surface is spaced apart from the bottom.

[0024] This applies not only when only one horizontal barrier is provided, but also when multiple horizontal barriers are provided, for example, in the shape of one or more inverted "Vs." This shape has the advantage of reducing splashing when an incoming off-center liquid metal jet strikes the upper surface of the horizontal barrier. This is because this shape guides the incoming jet downward toward the inner space of the impingement pot, reducing the impact of splashing molten steel droplets, which is a safety concern in steel mills. Multiple horizontal barriers, such as those disclosed in EP 2769785, may also be used. The angle between the inclined and descending upper surfaces may vary between >45° and <170°, with a preferred lower limit of >90° and a preferred upper limit of <140°. Instead of a specific angle between the inclined and descending upper surfaces, the transition region between the inclined and descending upper surfaces may be curved. The inclined and descending upper surfaces may have the same or different lengths. The circumferentially sloping and descending upper surface can be shaped as a straight leg or at least with a straight section, but can also be curved, e.g., convex or concave. Also, the upper surface can slope and / or descend in the circumferential direction while slope and / or descend in the protruding direction.

[0025] Some horizontal barriers may have lower surfaces that are perpendicular to the inner wall (i.e., not sloping or descending in the protruding direction) and parallel to the circumferential direction (i.e., not sloping or descending in the circumferential direction), even if the upper surfaces are sloping and / or descending in the protruding direction and sloping and / or descending in the circumferential direction. Some horizontal barriers having lower surfaces that are perpendicular to the inner wall are advantageous for the flow characteristics of the liquid metal and also allow for easier manufacturing of some horizontal barriers. Some horizontal barriers may also have lower surfaces that are parallel to the upper surfaces.

[0026] The cross-sectional profile of some horizontal barriers along the circumferential direction (i.e., in a plane spanning between the projection direction and the vertical direction) may vary, and may be, for example, polygonal (e.g., rectangular or triangular), semicircular, elliptical, etc. Combinations of these shapes may also be used.

[0027] Preferably, the vertical barriers have upper surfaces with one or more of the following shapes and orientations: inclined in the protruding direction, descending in the protruding direction, neither inclined nor descending from the protruding direction, curved in the circumferential direction of the inner surface, inclined in the circumferential direction of the inner surface, descending in the circumferential direction of the inner surface, and neither inclined nor descending in the circumferential direction of the inner surface. "Descending" means that the upper surface descending in the protruding direction (assuming the wall has an inner surface perpendicular to the bottom collision surface) descends so as to approach the bottom collision surface, and "inclined" means that the protruding, inclined upper surface is spaced apart from the bottom collision surface. When the inner surface of the wall is at a non-perpendicular angle to the bottom collision surface, the protruding direction is non-parallel to the collision surface. It is preferred that the upper surfaces of the horizontal barriers are inclined or descended in the protruding direction so as to be parallel to the inner surface of the bottom and / or a horizontal plane (the bottom may be inclined or descended from the horizontal plane).

[0028] When a vertical barrier is at least partially located within a horizontal gap between a respective vertical barrier and an adjacent horizontal barrier, and the upper surface of the vertical barrier is not parallel to the circumferential direction but has a peak due to, for example, an inclined and / or depressed or rounded portion, the peak may extend above the lower surface of the adjacent horizontal barrier, or even to some extent above the upper surface of the adjacent horizontal barrier. Nevertheless, in this case, the vertical barrier is still considered to be located below the adjacent horizontal barrier. In general, the center of mass of a vertical barrier may be considered to be below the center of mass of the adjacent horizontal barrier.

[0029] Preferably, the sidewalls of some vertical barriers are flat and preferably perpendicular to the bottom impingement surface. The sidewalls may also be curved or irregular. The sidewalls of some vertical barriers may intersect with the inner surface of the wall at a sidewall angle of 75 to 105 degrees, preferably 80 to 100 degrees, and most preferably 90 to 95 degrees. This sidewall angle represents the "outside angle," i.e., the "outside angle" as viewed from the interior space, rather than the "inside angle" as viewed from within the vertical barrier. A sidewall that intersects with the inner surface of the wall at a sidewall angle of 90 degrees is perpendicular to the inner surface of the wall. The sidewalls of the vertical barriers may intersect with the bottom impingement surface at an angle of 75 to 105 degrees, preferably 80 to 100 degrees, and most preferably 90 to 95 degrees. A 90-degree angle enhances the effect of disrupting the horizontal velocity component of the liquid metal flow along the bottom impingement surface. Angles greater than 90 degrees allow for easier manufacturing of the impingement pot, and therefore, angles slightly greater than but close to 90 degrees may be preferred.

[0030] Preferably, the walls of the impingement pot - measured from the impingement surface to the upper edge of the wall - have a constant height, for example, of 100 to 400 mm, preferably 105 to 380 mm. Typical wall height values are 105 mm, 160 mm, 180 mm, 210 mm, 235 mm, 250 mm or 380 mm.

[0031] Preferably, the distance between the nearest points of adjacent vertical and horizontal barriers is at least 5 mm, most preferably at least 10 mm.

[0032] Preferably, the distance between the nearest points of adjacent vertical and horizontal barriers is at most 50%, most preferably at most 85% of the wall height.

[0033] The vertical barriers may protrude into the inner space by 5 to 15% relative to the diameter of the inner space in the direction of protrusion of each vertical barrier. The diameter of the inner space in the protrusion direction refers to the diameter from the inner surface of the wall at the location of each vertical barrier to the opposing inner surface of the wall. If the bottom impact surface is rectangular and has dimensions of 520 x 720 mm, and the vertical barriers protrude into the inner space by 5 to 15% relative to the diameter of the inner space in the direction of protrusion of each vertical barrier, this results in a protrusion into the inner space of 26 to 78 mm for wall sections having an inner surface length of 520 mm (i.e., the vertical barriers are located on wall sections having an inner surface length of 720 mm), and a protrusion into the inner space of 36 to 108 mm for wall sections having an inner surface length of 720 mm (i.e., the vertical barriers are located on wall sections having an inner surface length of 520 mm).

[0034] Preferably, the vertical barrier on at least one side wall projects at least 26 mm and / or at most 78 mm into the interior space. Preferably, the vertical barrier on at least one side wall projects at least 36 mm and / or at most 108 mm into the interior space.

[0035] Preferably, the vertical barriers protrude into the interior space by at least 10 mm and / or at most 75 mm. The vertical barriers may also protrude into the interior space by at least 26 mm and / or at most 108 mm.

[0036] The vertical barriers may have a height of 25 to 70%, preferably 25 to 60%, relative to the total inner height of the abutting walls, the latter being particularly preferred when the inner height of adjacent walls is less than 300 mm.

[0037] Preferably, the plurality of vertical barriers have a height of at least 25mm, most preferably at least 35mm.

[0038] Preferably, multiple vertical barriers are positioned against the bottom impingement surface. Vertical barriers positioned against the bottom impingement surface (or spaced apart but so close to the bottom impingement surface that they affect the flow as if they were against it) are beneficial to flow distribution, as after an (off-center) liquid metal jet hits the impingement surface, the (asymmetric) flow typically flows parallel to the bottom impingement surface, and therefore it is preferred to position the vertical barriers close to the bottom impingement surface to maximize their ability to interrupt the liquid metal flows and direct them upwards.

[0039] The vertical barriers may also be arranged at a distance of, for example, at least 5 mm and / or at most 40 mm from the impact surface, and preferably at the same distance from the impact surface. It is also conceivable that adjacent vertical barriers are connected to each other at their undersides or are arranged on a ridge extending above the impact surface along the inner wall. This ridge may also be considered to be part of the bottom of the impact pot, in which case the vertical barriers are arranged on said bottom. Naturally, one or several vertical barriers may be arranged against the impact surface, while one or more other vertical barriers are arranged at a distance from the impact surface.

[0040] The vertical barriers are preferably arranged at a distance, preferably the same distance, from the upper end of the impingement pot. A different criterion (impingement surface at the bottom or upper end of the impingement pot) may be important in the case of profiled impact surfaces and / or upper ends of impingement pots that are not (at least partially) parallel to the horizontal, e.g., have a circumferentially inclined or descending surface.

[0041] Preferably, several horizontal barriers are arranged at a distance of at least 5 mm and / or at most 40 mm from the upper end of the impingement pot. Such an arrangement does not reduce the cross section of the opening at the upper end of the impingement pot. The larger the cross section of the opening at the upper end of the impingement pot, the greater the tolerance for deviation from the ideal (central) position by the incoming liquid metal jet. If several horizontal barriers are provided, it is preferable that they are arranged at the same distance from the upper end of the impingement pot. Of course, some horizontal barriers can also be arranged abutting the upper end of the impingement pot, while other horizontal barriers are arranged at a distance from the upper end of the impingement pot. Some horizontal barriers are arranged at a distance from the impingement surface. If several horizontal barriers are provided, it is preferable that they are arranged at the same distance from the impingement surface. Again, different criteria (impact surface at the bottom or top end of the impact pot) may be important in the case of profiled impact surfaces and / or top ends of impact pots that are not (at least partially) parallel to the horizontal, for example having circumferentially inclined or descending surfaces.

[0042] It is also conceivable to provide several further horizontal barriers at different distances from the upper end of the impingement pot as well as the initial several horizontal barriers. In particular, more than one row of horizontal barriers can be provided to further homogenize the incoming flows from the different vertical channels.

[0043] Preferably, the horizontal barriers protrude into the inner space by 2.5 to 15% of the diameter of the inner space in the direction of protrusion of each horizontal barrier. The diameter of the inner space in the direction of protrusion represents the diameter from the inner surface of the wall to the opposing inner surface of the wall at the position of each vertical barrier.

[0044] Preferably, the horizontal barrier projects at least 5 mm and / or at most 75 mm into the interior space.

[0045] It is advantageous if the protruding length of the vertical barrier exceeds that of the horizontal barrier. Preferably, the protruding length of the vertical barrier is 20 to 100% greater than that of the horizontal barrier. A larger protruding length of the vertical barrier increases the probability that a horizontal flow at the bottom impingement surface will collide with the vertical barrier without any significant drawbacks. The horizontal barrier also benefits from a protruding length, but if the protruding length of the horizontal barrier is large, it will be located near or at the upper end of the impingement pot, thereby reducing the cross section of the area of the upper opening of the impingement pot. It may be preferable to make the protruding length of the horizontal barrier smaller than that of the vertical barrier, provided that the cross section is not excessively reduced.

[0046] Preferably, the multiple vertical barriers overlap with several horizontal barriers adjacent to each vertical barrier 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. When multiple horizontal barriers are provided, the vertical barriers can overlap with all of the horizontal barriers adjacent to them in the circumferential direction. When multiple horizontal barriers are provided, the multiple vertical barriers can overlap with one or both of the horizontal barriers adjacent to each vertical barrier in the circumferential direction of the inner surface.

[0047] The vertical barriers may be spaced apart from several horizontal barriers adjacent to each vertical barrier in the circumferential direction of the inner surface. This is advantageous in situations where it is desirable to increase the cross-sectional area of the region of the upper opening of the impingement pot for higher liquid metal flow rates. When multiple horizontal barriers are provided, the vertical barriers may overlap one or both of the horizontal barriers adjacent to each vertical barrier in the circumferential direction of the inner surface.

[0048] The vertical barriers can also be arranged so that they are not spaced apart from or overlap with the horizontal barriers adjacent to each vertical barrier in the circumferential direction of the inner surface. This means that there can be no overlap or gap between the associated vertical barrier and the horizontal barrier adjacent to it in the circumferential direction of the inner surface. There is still a vertical gap. This represents an intermediate configuration between ensuring that all flows flowing upward in the vertical channel (i.e., between adjacent vertical barriers) collide with the respective horizontal barrier located above, and maximizing the cross section in the region of the upper opening. When multiple horizontal barriers are provided, the vertical barriers can be arranged so that they are not spaced apart from or overlap with one or both of the horizontal barriers adjacent to each vertical barrier in the circumferential direction of the inner surface.

[0049] When the horizontal and vertical barriers are alternately arranged around the circumference of the inner surface of the wall with no circumferential gaps between them (there may be overlap), this can result in an overall arrangement in which the metal melt flowing along the surface of the inner wall of the impingement pot contacts at least one of the vertical or horizontal barriers. The horizontal and vertical barriers can also be alternately arranged around the circumference of the inner surface of the wall with circumferential gaps between them.

[0050] The impact pot can be manufactured by casting, pressing, injection molding, or 3D printing and can contain basic or non-basic heat-resistant materials. The manufacture of the corresponding impact pot can involve the use of a so-called "vanishing template," e.g., a template made of a combustible material that burns off after the impact pot is manufactured. The impact pot can be manufactured as a single piece, or it can be assembled from a separate bottom piece and one continuous wall or several wall sections. The impact surface can have any shape, such as a trapezoid, triangle, circle, ellipse, etc., with a rectangular shape being preferred.

[0051] Preferably, the vertical and / or horizontal barriers are an integral part of the abutment wall, ie are manufactured integrally with said wall, in other words the wall and the barrier are provided by one ceramic part.

[0052] Preferably, the walls of the impingement pot and its upper end have no, or at least substantially no, protrusions towards the interior space of the impingement pot, providing an inlet area with the largest possible cross section and avoiding splashing of the metal melt even in the event of misalignment of the liquid metal jet. [Brief explanation of the drawings]

[0053] 1 to 12 show exemplary, schematic, and non-limiting advantageous embodiments of the present invention.

[0054] [Figure 1] 1 shows a collision pod with one horizontal barrier and multiple vertical barriers. [Figure 2] 1 shows a collision pot with multiple horizontal barriers and multiple vertical barriers. [Figure 3] 3 shows the impingement pot of FIG. 2, where a vertical barrier is placed on a raised portion of the bottom of the impingement pot. [Figure 4] FIG. 2 shows an impingement pot in which the side walls of the vertical barrier meet the inner surface of the impingement pot wall at a 95-degree angle. [Figure 5] 1 shows an impact pot having a plurality of horizontal barriers and a plurality of vertical barriers whose upper surface slopes downward in the circumferential direction and downward in the protruding direction. [Figure 6] FIG. 5 shows an impingement pot in which the sidewalls of the vertical barrier meet the inner surface of the impingement pot wall at a sidewall angle of 95 degrees. [Figure 7] 7 shows the impingement pot of FIG. 6, but with a top surface that slopes in the direction of the vertical barrier projection. [Figure 8] 7 shows the impingement pot of FIG. 6, but with a vertical barrier having a circumferentially sloping downward upper surface in the form of a roof. [Figure 9] 7 shows the impingement pot of FIG. 6, but with the vertical barrier having a circumferentially convexly curved upper surface. [Figure 10a] Figure 5 shows a portion of the inner surface of the wall of the impingement pot. [Figure 10b] Another embodiment is shown. [Figure 10c] Another embodiment is shown. [Figure 11a] 1 shows a flow simulation of molten metal in an impingement pot according to the prior art. [Figure 11b] Figure 5 shows a simulation of the flow of molten metal in the impingement pot. [Figure 12] 1 shows detailed regions of the molten metal flow. DETAILED DESCRIPTION OF THE INVENTION

[0055] 1 to 9 each show an impingement pot 1 comprising a bottom 10 having an upper impingement surface 10s and a wall 12 having an inner surface 12i, the wall 12 extending upward 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 interior space 16 having an inlet / outlet opening 18 for the melt at the upper end 14. The opening 18 in the figures is rectangular, for example.

[0056] Each of Figures 1a-9a shows a cut section of the impingement pot 1, where the impingement pot 1 is cut in half. Each of Figures 1b-9b shows the same cut section of the impingement pot 1 as the respective Figures 1a-9a, where a quarter of the impingement pot 1 has been cut off at a corner so that two sections of wall 12 are cut in half. These cuts in Figures 1a-9a and 1b-9b are, of course, made solely for ease of illustration.

[0057] The circumferential direction h is defined horizontally, i.e., along the outer periphery of the inner surface 12i of the wall 12, and is directed clockwise from above. Also defined are a vertical protrusion direction p from the inner surface 12i to the inner space 16, and a vertical direction v from the impact surface 10s of the bottom 10 to the upper edge 14 of the wall 12.

[0058] 1-9 are rectangular in shape by way of example only, the bottom 10 may have any shape, such as trapezoidal, triangular, circular, elliptical, etc., and the edges may also be rectangular, have other angles, or be rounded. Also, the impact surface 10s does not necessarily have to have the same shape as the bottom 10, for example, because the wall 12 may have various thicknesses.

[0059] Typical dimensions of the rectangular impact surface 10s may be 520 x 720 mm or 220 x 250 mm, or other sizes. The wall 12 is preferably vertical, i.e., intersecting the impact surface 10s of the bottom 10 at a 90-degree angle, but may also be inclined or sloped, preferably sloped outward at an angle of 7 to 10 degrees. The slope angle of the wall 12 may be selected to match the slope angle of the wall of the tundish in which the impact pot 1 is intended to be used. The impact surface 10s may also be structured and / or have sloped and / or sloped sections. The upper end 14 of the impact pot 1 is preferably closed along the periphery of the wall 12 as shown, but may have gaps and / or slits and / or other profiles. The upper end 14 of the impact pot 1 may also have a sloped or sloped section in the circumferential direction h. Preferably, the inner surface 12i of the wall 12 has a height of 225 to 300 mm. The wall 12 may be closed as shown, or may be provided with through holes.

[0060] The collision pot 1 shown in Figures 1 to 9 includes several horizontal barriers 2, which protrude from the inner surface 12i of the wall 12 into the internal space 16 in a protruding direction p, and further includes a plurality of vertical barriers 3 which protrude from the inner surface 12i of the wall 12 into the internal space 16 in the protruding direction p, and the vertical barriers 3 are arranged below several horizontal barriers 2 adjacent to each vertical barrier 3. Some of the horizontal barriers 2 have an upper surface 2u and a lower surface 2c, and may also have a front surface 2f.

[0061] A barrier may be defined by its horizontal dimension (circumferential direction h), its vertical dimension (vertical direction v), and its protruding dimension (protruding direction p). In this disclosure, vertical barrier 3 is defined as a barrier having at least a portion where the vertical dimension is greater than the horizontal dimension, and horizontal barrier 2 is defined as a barrier having at least a portion where the horizontal dimension is greater than the vertical dimension. Preferably, as disclosed in the figures, vertical barrier 3 has a vertical dimension that is greater than the horizontal dimension overall, and horizontal barrier 2 has a horizontal dimension that is greater than the vertical dimension overall.

[0062] 1 shows an impact pot 1 with one horizontal barrier 2 in the form of a protruding lip, preferably located at the upper end 14 of a wall 12. The horizontal barrier 2 has an upper surface 2u located in the vertical direction v defined herein, a front surface 2f located towards the interior space 18 (i.e. in the protruding direction p), and a lower surface 2u located towards the impact surface 12s (i.e. opposite to the vertical direction v defined herein). The upper surface 2u is here part of the upper end 14 of the wall 12, but may also be vertically spaced from the upper end 14 of the wall 12.

[0063] The front surface 2f may 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 spaced apart from the upper end 14 of the wall 12.

[0064] Furthermore, a plurality of vertical barriers 3, each having a rectangular parallelepiped shape, are vertically spaced apart from the horizontal barriers 2 by a vertical gap. The vertical gap may vary along the circumferential direction h depending on the shape and position of each vertical barrier 3 and / or each horizontal barrier 2. Each vertical barrier 3 has an upper surface 3u positioned 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 facing the circumferential direction h, i.e., one side surface 3s in the clockwise direction and one side surface 3s in the counterclockwise direction. Because the vertical barriers 3 are rectangular parallelepiped-shaped, the upper surface 3u of the vertical barrier 3 is flat, i.e., it does not slope, descend, or incline in the circumferential direction h or the protruding direction p, and the side wall 3s of the vertical barrier 3 intersects with the inner surface 12i of the wall 12 of the impingement pot 1 at a side wall angle α of 90 degrees. This sidewall angle α represents the “outside angle”, i.e. the “outside angle” as seen from within the inner space 16, rather than the “inside angle” as seen from within the vertical barrier 3.

[0065] Since the vertical barrier 3 has a rectangular parallelepiped shape, the vertical barrier 3 has a rectangular parallelepiped-shaped base. The vertical barrier 3 shown here abuts against the bottom 10. If the vertical barrier 3 does not abut against the bottom 10, the vertical barrier 3 may have a rectangular lower surface that is positioned toward the impact surface 12s (i.e., opposite to the vertical direction v defined herein).

[0066] Adjacent vertical barriers 3 are arranged with a horizontal gap G3 therebetween in the circumferential direction h, see Figure 10. Of course, the horizontal gap G3 can vary.

[0067] 2 shows an impingement pot 1 provided with a plurality of horizontal barriers 2 and a plurality of vertical barriers 3, the plurality of vertical barriers 3 being at least partially disposed within the horizontal gap G2 (see FIG. 10) between adjacent horizontal barriers 2. The horizontal barriers 2 (and vertical barriers 3) have, by way of example, a rectangular parallelepiped shape. Therefore, the upper surfaces 2u of the horizontal barriers 2 and the upper surfaces 3u of the vertical barriers 3 are flat, i.e., they do not slope, descend, or incline in the circumferential direction h or the protruding direction p, and the side walls 3s of the vertical barriers 3 and the side walls 2s of the horizontal barriers 2 intersect with the inner surface 12i of the wall 12 of the impingement pot 1 at a side wall angle α of 90 degrees.

[0068] It is particularly preferred if the vertical barriers 3 and / or the horizontal barriers 2 have a sidewall angle α of 75 to 105 degrees, more preferably 80 to 100 degrees, most preferably 90 to 95 degrees.

[0069] Figure 3 shows the impingement pot 1 of Figure 2, in which the vertical barrier 3 is arranged on a ridge that extends on the impingement surface 10s along the inner wall 12i of the impingement pot 1. This ridge can be considered to be part of the bottom 10, and in this case the vertical barrier 3 is arranged on said bottom 10.

[0070] Figure 4 shows the impingement pot 1 of Figure 2 in which the side wall 3s of the vertical barrier 3 meets the inner surface 12i of the wall 12 of the impingement pot 1 at a side wall angle α of 95 degrees (for ease of representation, the reference symbol α is shown on only one vertical barrier 3).

[0071] FIG. 5 shows an impingement pot 1 having a plurality of horizontal barriers 2 whose upper surface 2u slopes downward in a circumferential direction h, forming an inverted V-shape, i.e., the plurality of horizontal barriers 2 are arranged in a roof-like fashion. In one embodiment, a leg angle β of 135 degrees between the sloped and descending segments of the upper surface 2u is shown. The leg angle β is between >45° and <170°, with a preferred lower limit of >90° and a preferred upper limit of <140°. The transition regions between the sloped segments of the upper surface 2u may be curved. The descending and descending segments of the upper surface 2u have the same length, for example.

[0072] FIG. 6 shows the impingement pot from FIG. 5 in which, similar to FIG. 4, the side wall 3s of the vertical barrier 3 meets the inner surface 12i of the wall 12 of the impingement pot 1 at a side wall angle α of 95 degrees, and therefore the vertical barrier 3 has a trapezoidal base.

[0073] FIG. 7 shows the impingement pot 1 of FIG. 6, but with the upper surface 3u inclined in the protruding direction p.

[0074] FIG. 8 shows the collision pot of FIG. 6, but the vertical barrier 3 has an upper surface 3u that slopes downward in the circumferential direction h like a roof, similar to the upper surface 2u of the horizontal barrier 2.

[0075] FIG. 9 shows the collision pot of FIG. 6, but the vertical barrier 3 has an upper surface 3u that is convexly curved in the circumferential direction h.

[0076] When multiple horizontal barriers 2 are provided, the vertical barriers 3 are at least partially positioned within the horizontal gap G2 between adjacent horizontal barriers 2. Adjacent vertical barriers 3 are also arranged with a horizontal gap G3 between them in the circumferential direction h. By way of example only, the impingement pot 1 shown in FIGS. 2 to 9 includes horizontal barriers 2 and vertical barriers 3 alternately positioned along the periphery of the inner surface 12i of the wall 12. Also, multiple vertical barriers 3 may be at least partially positioned within the horizontal gap G2 between adjacent horizontal barriers 2, and / or multiple horizontal barriers 3 may be at least partially positioned within the horizontal gap G3 between adjacent vertical barriers 3. For the sake of clarity, reference numerals for the horizontal gap G2 between the horizontal barriers 2 and the horizontal gap G3 between the vertical barriers are not shown in FIGS. 1 to 9; see FIG. 10.

[0077] 1 to 9, the vertical barriers 3 are arranged in contact with the impact surface 10s. Alternatively, all or some of the vertical barriers 3 may be arranged at a distance of preferably up to 40 mm from the impact surface 10s. Alternatively, all or some of the vertical barriers 3 may be arranged at the same distance from the impact surface 10s.

[0078] 1 to 9, the front surface 3f of the vertical barrier 3 is, for example, parallel to a plane that is extended by the circumferential direction h and the vertical direction v (meaning, in these embodiments, that said surface 3f is parallel to the inner surface 12i of the side wall 12), and therefore intersects with the impact surface 10s at a side wall angle α of 90 degrees. Furthermore, the front surface 2f of the horizontal barrier 2 is, for example, parallel to a plane that is extended by the circumferential direction h and the vertical direction v. Of course, the front surface 3f of the vertical barrier 3 and / or the front surface 2f of the horizontal barrier 2 may have other orientations, structures, etc.

[0079] In the embodiment shown in Figures 2 to 9, the horizontal barriers 2 are positioned at the same vertical distance from the upper end 14 of the impingement pot 1. Alternatively, the horizontal barriers 2 may be positioned at different distances from the upper end 14 of the impingement pot 1. Preferably, the horizontal barriers 2 are positioned at a distance of at least 5 mm and / or at most 40 mm from the upper end 14.

[0080] 10a, 10b, and 10c show the inner surface 12i of the wall 12, in which three different arrangements of the vertical barriers 3 and the horizontal barriers 2 are shown. The circumferential direction h, the vertical direction v, and the protruding direction p are shown, with the latter pointing toward the bystander, and the horizontal barriers 2 are simply configured in an inverted V shape, as an example. The vertical barriers 3 are, as an example, rectangular parallelepipeds configured as shown in FIG. 5. The vertical barriers 3 are arranged with a horizontal gap G3 in the circumferential direction h, and the horizontal barriers 2 are also arranged with a horizontal gap G2 in the circumferential direction h. The vertical barriers 3 are arranged below adjacent horizontal barriers 2.

[0081] In Figure 10a, the vertical barriers 3 are not spaced apart from, and do not overlap (indicated by dashed vertical lines) with, all of the horizontal barriers 2 adjacent to each vertical barrier in the circumferential direction h, as shown in Figure 5. Figure 10b shows the same arrangement, with the vertical barriers 3 spaced apart from, and adjacent to, each vertical barrier in the circumferential direction h, leaving horizontal gaps G1 therebetween (indicated by dashed vertical lines), and in Figure 10c, the vertical barriers 3 overlap with all of the horizontal barriers 2 adjacent to each vertical barrier in the circumferential direction h, again indicated by dashed vertical lines. Of course, it is also possible for only some of the vertical barriers 3 to overlap or be spaced apart from all or some of the adjacent horizontal barriers 2 in the circumferential direction h, or for only some vertical barriers 3 to be not spaced apart from, and not overlapping with, all or some of the adjacent horizontal barriers 2 in the circumferential direction h. It is also possible that all of the vertical barriers 3 overlap or are spaced apart from all or only some of the adjacent horizontal barriers 2 in the circumferential direction h, or that all of the vertical barriers 3 are not spaced apart from only some of the adjacent horizontal barriers 2 in the circumferential direction h and do not overlap only some of the horizontal barriers 2.

[0082] Notwithstanding the typical arrangements shown in Figures 2 to 9, the vertical barriers 3 may in any case be arranged (a) spaced apart from adjacent horizontal barriers 2, or (b) overlapping adjacent horizontal barriers 2, or (c) not spaced apart from or not overlapping adjacent horizontal barriers 2.

[0083] The vertical barrier 3 and / or the horizontal barrier 2 may be an integral part of the abutment wall. The horizontal barrier 2 may have a lower surface 2c parallel to the horizontal plane or may have a lower surface 2c parallel to the upper surface.

[0084] Preferably, the vertical barrier 3 projects into the inner space 16 by 5 to 15% with respect to the length of the inner surface of the wall 12 in the projection direction p, preferably by at least 10 mm and / or at most 75 mm. The vertical barrier 3 may have a height of 25 to 60% with respect to the inner height of the abutment wall 12. The horizontal barrier 2 may project into the inner space 16 by at least 10 mm and / or at most 75 mm in the projection direction p.

[0085] The vertical barrier 3 has an upper surface that extends mainly in the circumferential direction h and in the projection direction p.

[0086] The vertical barriers 3 are arranged below the adjacent horizontal barriers 2, but the vertical barriers 3 that are not adjacent to the horizontal barriers 2 (these vertical barriers 3 are located in another section of the wall or in the same wall section, but are not the next vertical barrier in the circumferential direction h, i.e., are not adjacent) may be arranged above the non-adjacent barriers. It is preferable that the vertical barriers 3 of one section of the wall 12 (for example, one side of the collision pot 1 having a collision surface 10s in the shape of a polygon, for example a rectangle) are arranged below all the horizontal barriers 2 of the wall section, and it is even more preferable that the vertical barriers 3 are arranged below all the horizontal barriers 2, as shown in Figures 1 to 9.

[0087] Computer simulation and water modeling experiments have shown that this impingement pot 1 having the vertical barriers 3 and horizontal barriers 2 disclosed herein reduces the velocity of the metal flow, reduces turbulence within the impingement pot 1, and reduces the surface velocity and surface turbulence within the corresponding metallurgical vessel, compared to all types of prior art devices discussed above. This is an indication of more efficient energy dissipation within the impingement pot 1. Also, a more uniform distribution of the metal flow within the tundish is achieved, while minimizing residence time differences between strands, especially in the case of misaligned shrouds.

[0088] Metal injected into the impingement pot 1 strikes the impingement surface 10s. Any metal stream flowing upward inside the impingement pot 1 near a section of the wall 12 (within its interior space 16) is guided by the corresponding vertical barrier 3, impinges on the lower surface 2c of the corresponding horizontal barrier 2, thereby turning inward (into the interior space 16), and then turning upward to exit the impingement pot through the opening 18. If the metal is injected into the impingement pot 1 off-center, to the extent 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 injection, the inclination and / or depression of said upper surfaces 2u and / or 3u deflects the incident jet towards the interior space 16 of the impingement pot, avoiding the upward splashing of metal droplets.

[0089] Figure 11a shows the simulation results for an impingement pot with multiple horizontal barriers in an inverted "V" shape. For illustration purposes, a top-front view was chosen, in which only the impingement surface and one wall section are shown, with reference numbers omitted. Molten metal flow lines are shown, with arrows indicating the flow direction. While this design works fairly well to dissipate the incoming kinetic energy and reduce turbulence, a misaligned ladle shroud or nozzle still results in uneven flow of liquid metal from the impingement pot. Typically, metal flow drifts to the side opposite the misalignment direction because it is the path of least resistance. This is shown in Figure 11, where liquid metal is poured into impingement pot 1 from an off-center position to the right, with the metal flow drifting to the upper left. This upward flow to the side also attracts some flow from nearby areas, represented by the incoming flow line from the upper right corner.

[0090] Figure 11b shows the simulation results for the impingement pot 1 in Figure 5 as an example. The same top-front view as in Figure 11a is used, and like Figure 11a, the liquid metal flow is indicated by flow lines with arrows indicating the flow direction. The metal flow is injected into the impingement pot 1 in the same off-center manner as in Figure 11a. After collision, the liquid metal flow initially flows parallel to the impingement surface 12s toward the opposite side of the off-center jet position. The vertical barrier 3 blocks the metal flow horizontally, destroying the horizontal velocity component and directing the flow upward against the lower surface 2c of the horizontal barrier 2. The collision between the horizontal metal flow and the vertical barrier can generate some vortices at the bottom between adjacent vertical barriers. This occurs due to a forced change in flow direction, which occurs whenever an obstacle is present in the fluid's path. Such swirling helps to maintain the incoming flows within their respective vertical channels and ensures that these flows flow upward instead of exiting the vertical channels horizontally. As the metal streams are guided upward and collide with the horizontal barriers 2, localized turbulence is generated, causing the velocities from the different vertical streams to mix and homogenize. These streams then follow the path defined by the gaps G2 between the horizontal barriers 2, from where they are uniformly distributed in all directions at uniform velocity into the tundish without drifting to either side. Similar results have been shown for other embodiments of the impingement pot 1 having several vertical barriers 3 and multiple horizontal barriers 2 according to the present disclosure.

[0091] In Figure 12, the flow in the rear section of the wall 12 is shown in more detail (including more flow lines), and different flow regions A, B, C, D, E, and F are defined; other reference numerals have been omitted to better illustrate the flow lines. The upper opening area A refers to the outflow from the upper opening 18, the transition area B refers to the transition area between the vertical barrier 3 and the horizontal barrier 2, and the lower areas C, D, E, and F refer to the gaps between adjacent vertical barriers 3. The flow is strongest in the lower area E, while the flow in the lower areas C, D, and F is comparatively weaker. This is because the incoming liquid metal flow strikes the right-hand impingement surface 10s, thus near the lower area E. Although the lower area F is close to the liquid metal flow impingement area, it is close to the right wall section and behind a vertical barrier (not shown) located in the right wall section of the impingement pot, making the flow weaker. The vertical barrier 3 guides the flow toward the horizontal barrier 2. Therefore, the vertical barrier 3 enhances the effectiveness of the horizontal barrier 2, as seen in the transition area B. The horizontal barrier 2 promotes mixing between the inflowing flows from adjacent vertical channels (constructed within the gap G3 between two adjacent vertical barriers 3). This results in equalization of the flows between the different vertical channels. If one vertical channel has a stronger flow than the adjacent channel due to asymmetric flow, the turbulence caused by the collision of the flow with the horizontal barrier 2 equalizes and then evenly distributes these flows. Therefore, the horizontal barrier 2 enhances the effectiveness of the vertical barrier 3 in reducing asymmetry, resulting in uniform flow in the upper opening region A, even when the flow varies significantly between the different lower regions C, D, E, and F. Vortices can be generated where the molten metal flow collides with an obstacle or an opposing flow stream. This can be observed in Figure 12 in the region between the vertical and horizontal barriers where the opposing flows are mixing. The swirl further enhances the equalization effect and is beneficial for reducing the velocity difference between adjacent vertical channels.

Claims

1. A heat-resistant impingement pot (1) comprising a bottom (10) having an impingement surface (10s) and a wall (12) having an inner surface (12i), the wall (12) extending upward from the bottom (10) to an upper end (14) of the impingement pot (11), the inner surface (12i) of the wall (12) and the impingement surface (10s) defining an internal space (16), several horizontal barriers (2) are provided, and the several horizontal barriers (2) are connected to the wall (12). A heat-resistant collision pot (1) characterized in that a plurality of vertical barriers (3) are provided protruding from the inner surface (12i) of the wall (12) into the internal space (16) in a protruding direction (p), and the plurality of vertical barriers (3) are arranged below some of the horizontal barriers (2) adjacent to each of the vertical barriers.

2. 2. The heat-resistant collision pot of claim 1, characterized in that the several horizontal barriers (2) have an upper surface (2u) having one or more of the following shapes and orientations: inclined in the protruding direction (p), descending in the protruding direction (p), not inclined or descending from the protruding direction (p), curved in the circumferential direction (h) of the inner surface (12i), inclined in the circumferential direction (h) of the inner surface (12i), descending in the circumferential direction (h) of the inner surface (12i), not inclined or descending in the circumferential direction (h) of the inner surface (12i).

3. 3. A heat-resistant collision pot as claimed in claim 1 or 2, characterized in that the vertical barrier (3) has an upper surface (3u) having one of the following shapes and orientations: inclined in the protruding direction (p), descending in the protruding direction (p), not inclined or descending from the protruding direction (p), curved in the circumferential direction (h) of the inner surface (12i), inclined in the circumferential direction (h) of the inner surface (12i), descending in the circumferential direction (h) of the inner surface (12i), not inclined or descending in the circumferential direction (h) of the inner surface (12i).

4. A heat-resistant collision pot according to any one of claims 1 to 3, characterized in that the side walls (3s) of the vertical barrier (3) are flat and preferably perpendicular to the collision surface (10s) of the bottom (10).

5. 5. A heat-resistant impingement pot according to any one of claims 1 to 4, characterized in that the side walls (3s) of the vertical barrier (3) meet the inner surface (12i) at an angle of 75 to 105 degrees, preferably 80 to 100 degrees, most preferably 90 to 95 degrees.

6. A heat-resistant collision pot as described in any one of claims 1 to 5, characterized in that the multiple vertical barriers (3) protrude into the inner space (16) by 5 to 15% with respect to the diameter of the inner space (16) in the protruding direction (p) of each vertical barrier (3).

7. 7. A heat-resistant impingement pot according to any one of claims 1 to 6, characterized in that the vertical barriers (3) protrude into the inner space (16) by at least 10 mm and / or by a maximum of 75 mm.

8. A heat-resistant collision pot according to any one of claims 1 to 7, characterized in that the plurality of vertical barriers (3) have a height of 25 to 70%, preferably 25 to 60%, relative to the height of the inner surface (12i) of the abutment wall (12).

9. 9. Heat-resistant collision pot according to any one of claims 1 to 8, characterized in that the vertical barriers (3) are arranged in abutment against the collision surface (10s).

10. A heat-resistant collision pot according to any one of claims 1 to 9, characterized in that the several horizontal barriers (2) are arranged at a distance of preferably at least 5 mm and / or at most 40 mm from the upper end (14) of the collision pot (1).

11. A heat-resistant collision pot as described in any one of claims 1 to 10, characterized in that some of the horizontal barriers (2) protrude into the inner space (16) by 2.5 to 15% with respect to the diameter of the inner space (16) in the protruding direction (p) of each of the horizontal barriers (2).

12. 12. Heat-resistant impingement pot according to any one of claims 1 to 11, characterized in that the several horizontal barriers (2) protrude into the inner space (16) by at least 5 mm and / or by a maximum of 75 mm.

13. A heat-resistant collision pot as claimed in any one of claims 1 to 12, characterized in that the plurality of vertical barriers (3) overlap with some of the horizontal barriers (2) adjacent to each of the vertical barriers (3) in the circumferential direction (h) of the inner surface (12i).

14. A heat-resistant collision pot as claimed in any one of claims 1 to 12, characterized in that the vertical barriers (3) are spaced apart from the several horizontal barriers (2) adjacent to each vertical barrier (3) in the circumferential direction (h) of the inner surface (12i).

15. A heat-resistant collision pot as claimed in any one of claims 1 to 12, characterized in that the multiple vertical barriers (3) are arranged in the circumferential direction (h) of the inner surface (12i) so that each vertical barrier (3) is not spaced apart from and does not overlap with several of the adjacent horizontal barriers (2).

16. 16. Heat-resistant impingement pot according to any one of claims 1 to 15, characterized in that the vertical barriers (3) and / or the several horizontal barriers (2) are an integral part of the abutment wall (12).

17. A heat-resistant collision pot as claimed in any one of claims 1 to 16, characterized in that a plurality of horizontal barriers (2) are provided, and the plurality of vertical barriers (3) are at least partially arranged within horizontal gaps (G2) between the respective vertical barriers (3) and adjacent horizontal barriers (2).

18. 18. The heat-resistant collision pot according to claim 17, characterized in that the horizontal barriers (2) and the vertical barriers (3) are alternately arranged along the periphery of the inner surface (12i) of the wall (12).

Images