JP2014113634A - Tundish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tundish that is applicable to many strands while being compact, and can sufficiently reduce unevenness of a molten steel temperature between the strands while maintaining quality of cast pieces.SOLUTION: A tundish 3 of the present invention includes an injection chamber 10, a distribution chamber 11, a partition gate 12 and a runner 22. In the distribution chamber 10, the first to the sixth injection inlets 22a-22f are formed sequentially. One runner 21a among the runners 21a, 21b formed in the partition gate 12 is disposed to between the second injection inlet 22b and the third injection inlet 22c, and the other runner 21b is disposed to between the fourth injection inlet 22d and the fifth injection inlet 22e.

Description

  The present invention relates to a multi-strand tundish in which a plurality of inlets for charging molten steel into a mold are provided in a distribution chamber.

Conventionally, in continuous casting equipment, the molten steel produced from converters, secondary refining equipment, etc. is transported to the tundish using a ladle, and the molten steel in the ladle is poured into the tundish, and then this tundish is used. The molten steel is continuously cast by supplying molten steel to the mold.
One such tundish is disclosed in Patent Document 1.
Patent Document 1 describes a T-type tundish provided in a continuous casting facility for continuously casting molten steel charged from a ladle, an injection chamber in which molten steel from the ladle is charged, It has a distribution chamber for charging molten steel into the mold, a partition weir for partitioning the injection chamber and the distribution chamber, and a runner provided in the partition weir to allow the molten steel in the injection chamber to flow into the distribution chamber. In addition to the tundish disclosed in Patent Document 1, there are patent documents 2 to 8 as tundishes.

JP 2012-187596 A Japanese Patent No. 3336962 JP-A-6-142855 Japanese Utility Model Publication No. 4-12352 Japanese Utility Model Publication 4-34998 Japanese Utility Model Publication No. 6-86849 Japanese Patent No. 3581587 JP 2010-167457 A

  The T-type tundish of Patent Document 1 is provided with four inlets (first inlet to fourth inlet) in the distribution chamber, and the first inlet to the first inlet. A fourth inlet is arranged in order from the left side. Here, the molten steel injected from the first inlet becomes a one-strand slab, and thereafter, the molten steel injected from the fourth inlet becomes a four-strand slab. Therefore, the first to fourth inlets may be synonymously referred to as the first to fourth strands.

  Now, in the tundish of patent document 1, the molten steel of an injection | pouring chamber passes through the hole (runner channel) of a partition weir, and is discharged to the center part of a distribution chamber, ie, the area | region between a 2nd strand and a 3rd strand. Is done. The discharged molten steel collides with the front wall of the tundish, then branches to the left and right and flows toward the second strand and the third strand. A part of the molten steel flows out into the second strand and the third strand, and the remaining molten steel flows into the first strand and the fourth strand. As described above, in the process of moving the molten steel, the temperature of the molten steel gradually decreases with time due to heat dissipation and conduction to the refractory, so that the first strand and the fourth strand rather than the second strand and the third strand. The injection temperature is lower. For example, as described in Patent Document 2, the temperature difference of molten steel exceeds 5 ° C.

  If the molten steel temperature approaches the solidification temperature, the nozzle may become clogged and operation may not be possible. Therefore, the molten steel temperature should be raised in advance before pouring the molten steel in accordance with the molten steel temperatures of the first and fourth strands where the temperature is lowered. It is necessary to keep it. For example, it is necessary to increase the steel output temperature in the converter, electric furnace, or molten steel treatment process. A slight rise in the steel output temperature greatly affects the refractory wear and increases the power consumption, thus increasing the production cost. On the other hand, when the molten steel temperature to the strand is too high, the slab quality is adversely affected. The second strand and the third strand must be 5 ° C. higher than the target temperature, and the quality of the slab may deteriorate.

As described above, when there is a large temperature difference (a large temperature drop) between the strand located on the center side of the tundish and the strand located on the side far from the center of the tundish, as described above. Will cause serious problems.
Then, in order to reduce the molten steel temperature difference between strands, the shape of the tundish is made as shown in FIG. 3 of Patent Document 3, as shown in FIG. 1 of Patent Document 4, or as shown in FIG. 2 of Patent Document 5. Although it can be considered that the molten steel injected into the injection chamber reaches the strands as evenly as possible, when the number of strands exceeds four, the tundish becomes too large and the operation is actually performed. Can be difficult. Also, if the tundish is too large, the residence time staying in the molten steel tundish will become very long, and even if the molten steel temperature difference between the strands can be reduced, the temperature drop of the molten steel itself will be remarkably reduced, and the casting will be reduced. There is a possibility of degrading the quality of the piece. That is, even if the tundishes of Patent Documents 1 to 5 are used, the actual situation is that the molten steel temperature difference between strands, that is, the variation in molten steel temperature, cannot be sufficiently reduced while maintaining the quality of the slab. is there. In addition to Patent Documents 1 to 5, there are tundishes of Patent Documents 6 to 8, but even if these are used, the variation in molten steel temperature between strands is sufficiently maintained while maintaining the quality of the slab. The fact is that it cannot be made smaller.

  Accordingly, an object of the present invention is to provide a tundish that can be applied to multiple strands while being compact, and that can sufficiently reduce variations in molten steel temperature between strands while maintaining the quality of the slab. And

In order to achieve the above object, the present invention has taken the following measures.
That is, the tundish of the present invention partitions the injection chamber into which molten steel from a ladle is injected, a distribution chamber having a plurality of injection ports for charging the molten steel into a mold, and the injection chamber and the distribution chamber. A tundish provided with a partition weir and at least two runners provided in the partition weir to allow molten steel to flow from the injection chamber to the distribution chamber, wherein the distribution chamber includes first to sixth Are sequentially formed, and one of the runners formed in the partition weir is disposed between the second and third inlets, and the other hot water is provided. The road is disposed between the fourth inlet and the fifth inlet.

In the other tundish of the present invention, the first to fifth inlets are formed in the distribution chamber in order, and one of the runners formed in the partition weir, Arranged between the second inlet and the third inlet, and the other runner is arranged between the third inlet and the fourth inlet. It is characterized by.
Furthermore, in the other tundish of the present invention, the distribution chamber is formed with first to fourth inlets in order, and one of the runners formed in the partition weir, Arranged between the first inlet and the second inlet, and the other runner is arranged between the third inlet and the fourth inlet. It is characterized by.

It is preferable that the depth of the distribution chamber is gradually reduced toward the outside along the width direction of the distribution chamber.
It is preferable that a reinforcing member that reinforces the partition weir is provided at the center in the width direction of the distribution chamber.
In the partition weir, it is preferable that a flow hole is provided between the one runway and the other runway separately from the runway.

  According to the tundish of the present invention, it can be applied to multiple strands while being compact, and variation in molten steel temperature between strands can be sufficiently reduced while maintaining the quality of the cast slab.

It is a conceptual diagram of a continuous casting apparatus. It is a top view of the 6 strand tundish of this invention. It is a top view of the 5-strand tundish of the present invention. It is a top view of the 4-strand tundish of the present invention. It is the top view which provided the reinforcement member in the tundish in which the partition weir is substantially V shape. It is the top view which made the partition weir of the tundish straight. It is the top view which provided the reinforcement member in the tundish where the partition weir is linear. It is a top view of the conventional 6 strand tundish. It is a distribution map of the molten steel temperature in the 6 strand tundish of this invention. It is a distribution map of the molten steel temperature in the conventional 6 strand tundish. It is a top view of the tundish which provided one circulation hole in the substantially V-shaped partition weir. It is a top view of the tundish which provided two through-holes in the substantially V-shaped partition weir. It is a top view which provided the flow hole in the tundish in which the partition weir was substantially V-shaped and provided the reinforcement member. It is a top view of the tundish which provided one distribution hole in the linear partition dam. It is a top view of the tundish which made the 2nd side wall into the shape of a straight line (injection chamber is substantially square). It is a top view of the tundish which bent the 1st back wall (wall on the back side) in two steps. It is a top view of the tundish which made the 1st back wall and the 2nd side wall (back side wall) circular. It is a top view of the tundish which made the partition weir completely V-shaped.

The tundish of the present invention will be described with reference to the drawings.
FIG. 1 shows a continuous casting facility equipped with the tundish of the present invention.
As shown in FIG. 1, a continuous casting facility 1 includes a tundish 2 for temporarily storing molten steel, a mold 3 for casting molten steel, and a plurality of support rolls that support and transfer a slab 4 coming out of the mold 3. 5. In the continuous casting equipment 1 having such a configuration, the molten steel carried by the ladle 6 is poured into the tundish 2, and the poured molten steel is applied to the mold 3 through the immersion nozzle 7 provided in the tundish 2. Injected. In the casting mold 3, the injected molten steel is cooled and becomes a slab 4 in a state where the surface portion is solidified, pulled out from the lower part of the casting mold 3 while being held by the support roll 5, and conveyed downstream. ing.

Next, the configuration of the tundish will be described in detail.
For the convenience of explanation, as shown in FIG. 2, in a state where the tundish 2 is viewed in plan, the lower side of FIG. 2 is referred to as the front side, the upper side of FIG. The left-right direction in FIG. 2 is referred to as the width direction. When the tundish 2 is viewed in plan, the same applies to the other drawings.

As shown in FIG. 2, the tundish 2 is formed in a bottomed box shape, and the tundish 2 is charged into the casting chamber 10 into which the molten steel from the ladle 6 is injected, and the molten steel is charged into the mold 3. And a partition weir 12 provided between the injection chamber 10 and the distribution chamber 11.
Specifically, the tundish 2 has a bottom wall 15 that is substantially T-shaped in plan view, a front wall 16 that rises from the front side of the bottom wall 15, and the bottom wall that is located on both ends in the width direction of the front wall 16. A pair of left and right first side walls 17, 17 rising from 15, and a pair of left and right first rear walls 18, which are on the rear side of the front wall 16 and rise from the middle part of the bottom wall 15 and connect to the first side walls 17, 17. 18 and a pair of left and right second side walls 19 and 19 rising from the bottom wall 15 on the end side on the inner side in the left and right direction of the first rear walls 18 and 18 and the bottoms disposed between the second side walls 19 and 19. The second rear wall 20 rises from the rear side of the wall 15.

  As shown in FIG. 2, in the plan view of the tundish 2, the front wall 16 and the second rear wall 20 are parallel to each other, and the first rear walls 18 and 18 and the second side walls 19 and 19 are formed on the front wall 16. On the other hand, it is inclined. Specifically, each of the first rear walls 18 and 18 gradually transitions to the front side from the inner end to the outer end, and each of the second side walls 19 and 19 also has an inner end. It gradually shifts to the front side as it goes from the outer edge to the outer edge.

The partition weir 12 includes a first dam portion 12a that is parallel to the front wall 16, and a pair of second dam portions 12b that move outward in the width direction from the opposite ends of the first dam portion 12a in the width direction. It is comprised by. That is, the partition weir 12 is substantially V-shaped by the first dam portion 12a and the second dam portion 12b.
The injection chamber 10 is configured by being surrounded by a pair of left and right second side walls 19, 19, a second rear wall 20, a partition weir 12 (first weir portion 12 a and second weir portion 12 b), and a bottom wall 15. Has been. The distribution chamber 11 includes a front wall 16, a pair of left and right first side walls 17, 17, a first rear wall 18, 18, a partition weir 12 (first weir portion 12a, second weir portion 12b), and a bottom wall. 15 is enclosed.

In the tundish 2 of the present invention, the temperature of the molten steel charged into the mold 3 from the inlet 22 is substantially uniform by devising the configuration of the runner 21 provided in the partition weir 12 and the inlet 22 provided in the distribution chamber 11. I have to.
The characteristic configuration of the tundish 2 of the present invention will be described in more detail.
As shown in FIG. 2, the distribution chamber 11 is provided with six inlets 22... 22 for inserting molten steel into the mold 3. Specifically, three inlets 22 are provided in the width direction on the left side from the center line (widthwise center) C1 of the tundish 2, and the three inlets 22 are also provided on the right side from the center line C1. Evenly provided in the direction.

  That is, the distribution chamber 11 is provided with six injection ports 22 in order from the left side. For convenience of explanation, the leftmost inlet 22 is defined as the first inlet 22a, the second inlet 22b, the third inlet 22c, and the fourth inlet 22d in order from the first inlet 22a to the right. A fifth inlet 22e and a sixth inlet 22f are provided. The first inlet 22a to the sixth inlet 22f are located at the same distance from the front wall 16, and the centers of the inlets 22 are in a straight line.

  Here, the molten steel injected from the first inlet becomes a cast piece of the first strand, and thereafter, the molten steel injected from the sixth inlet becomes a cast piece of the sixth strand. Therefore, the first to sixth inlets are synonymously referred to as first strand 22a to sixth strand 22f. The first strand 22a to the sixth strand 22f are located at the same distance from the front wall 16, and the center of each strand 22 is in a straight line.

The partition weir 12 is provided with at least two runners 21 through which molten steel flows from the injection chamber 10 to the distribution chamber 11. Specifically, each of the second dam portions 12b is provided with runners 21. When the runner 21 is viewed in plan, the axial center of the runner 21 has a square shape.
In other words, the angle formed by the center line C1 and the axis of the runner (first runner) 21a provided on the left second dam portion 12b is θ1, and the runner provided on the right second dam portion 12b ( The first runner 21a and the second runner 21b are provided so that θ1 = θ2 when the angle between the axis of the second runner 21b and the center line C1 is θ2. Moreover, the horizontal distance (distance in the width direction) from the first runway 21a to the center line C1 is the same as the horizontal distance from the second runway 21b to the center line C1.

  Now, the target point P1 where the strand center line C2 connecting the centers of the strands and the extension line L1 extending the axis of the first runner 21a intersects is between the second strand 22b and the third strand 22c. positioned. Further, the target point P2 where the strand center line C2 and the extension line L2 extending from the axis of the second runner 21b intersect is located between the fourth strand 22d and the fifth strand 22e.

That is, in the 6-strand tundish 2 having six inlets 22, one runner 21 (first runner 21 a) is disposed between the second strand 22 b and the third strand 22 c, and the other The runner 21 (second runner 21b) is disposed between the fourth strand 22d and the fifth strand 22e.
Next, the flow of molten steel will be described.

Hereinafter, for convenience of explanation, the flow of molten steel will be described by focusing on the left side of the tundish 2. However, the right side of the tundish 2 is symmetrical with the left side, and the description thereof is omitted.
If the 1st runway 21a is arrange | positioned as mentioned above, the discharge flow of the molten steel discharged from the 1st runway 21a will come to branch in the target point P1 vicinity after reaching the target point P1. At this time, the molten steel easily flows to the left side, and the flow rate is larger on the left side than on the right side of the target point P1. The molten steel on the left side of the tundish 2 enters the second strand 22b and the third strand 22c and goes out to the mold 3. On the other hand, the remaining molten steel enters and leaves the first strand 22a that is farthest away, but the first rear walls 18 and 18 are inclined with respect to the front wall 16 as described above. Accordingly, the depth of the distribution chamber 11 is gradually reduced as it goes outward along the width direction, so that the residence time of the molten steel between the second strand 22b and the first strand 22a can be shortened.

The operation of the tundish 2 of the present invention described above will be described based on the molten steel temperature distribution obtained by FEM flow analysis.
FIG. 9 shows the distribution of molten steel temperature by FEM flow analysis in the conventional 6-strand tundish 2 shown in FIG. FIG. 10 shows the distribution of molten steel temperature by FEM flow analysis in the 6-strand tundish 2 of the present invention. The molten steel temperature in the ladle 6 was set to 1520 ° C.

  As shown in FIG. 9, in the conventional tundish 2, the molten steel temperature of the fourth strand 22d from the center line C1 is 1517.92 ° C., but the molten steel temperature of the outermost sixth strand 22f is 1508.86 ° C. The molten steel temperature difference between the two strands is about 9.1 ° C. Moreover, the molten steel temperature difference of the molten steel temperature of the 6th strand 22f and the molten steel temperature in the ladle 6 will be about 11.1 degreeC.

  Generally, in the conventional tundish 2, the molten steel temperature of the fifth strand 22e is lower by about 5 ° C. than the molten steel temperature of the fifth strand 22e, and the molten steel temperature of the sixth strand 22f is further molten steel of the fourth strand 22d. It is about 5 ° C. lower than the temperature. The temperature difference between the molten steel temperature of the sixth strand 22f and the molten steel temperature of the fourth strand 22d is about 10 ° C. The molten steel temperature distribution of the third strands 22c of the first strands 22a to 22c is the same as described above.

  On the other hand, as shown in FIG. 10, in the tundish 2 of the present invention, the molten steel temperature of the fourth strand 22d is 151.36 ° C., the molten steel temperature of the fifth strand 22e is 151.84 ° C., and the sixth strand The molten steel temperature of 22f is 1513.04 ° C., and the molten steel temperature difference between the strands is at most about 2.5 ° C. Moreover, the molten steel temperature difference between the molten steel temperature of the sixth strand 22f and the molten steel temperature in the ladle 6 remains at about 7.0 ° C., and the molten steel temperature of the fourth strand 22d and the molten steel temperature in the ladle 6 The difference in temperature of the molten steel is about 7.6 ° C. The same applies to the molten steel temperature distribution of the third strands 22c of the first strands 22a to 22c.

As described above, in the tundish 2 of the present invention, even when there are multiple strands such as 6 strands, the variation in molten steel temperature between strands, that is, the temperature difference can be sufficiently reduced.
FIG. 3 shows the tundish 2 of the present invention in which the number of strands is changed to five, and FIG. 4 shows the tundish 2 of the present invention in which the number of strands is changed to four.

As shown in FIG. 3, in the 5-strand tundish 2, one runner 21 (first runner 21a) is disposed between the second strand 22b and the third strand 22c, and the other runner 21 21 (second runner 21b) is disposed between the third strand 22c and the fourth strand 22d.
As shown in FIG. 4, in the 4-strand tundish 2, one runner 21 (first runner 21a) is arranged between the first strand 22a and the second strand 22b, and the other The road 21 (second runway 21b) is disposed between the third strand 22c and the fourth strand 22d. Since the other configurations of the 5-strand and 4-strand tundish 2 are the same as those of the 6-strand tundish 2, description thereof will be omitted.

5-7 and FIGS. 11-18 show the modification of the tundish 2 of this invention. The modification is a tundish 2 of 6 strands, but a tundish 2 of 5 strands or 4 strands is also applicable. Hereinafter, modified examples will be described in order.
As shown in FIG. 5, a reinforcing member 25 that reinforces the partition weir 12 may be provided between the partition weir 12 and the front wall 16. That is, the reinforcing member 25 made of a refractory is installed so as to connect the widthwise center portion of the first dam portion 12a and the widthwise center portion of the front weir. In this case, it is preferable to arrange the reinforcing member 25 on the center line C1. In this way, the behavior of the molten steel flow that flows through the distribution chamber 11 of the tundish 2 is axisymmetric with respect to the center line C1, so that the influence of the change in the behavior of the molten steel flow due to the provision of the reinforcing member 25 is affected. Can be kept to a minimum. That is, even if the reinforcing member 25 is provided, there is no significant effect on the molten steel temperature difference between the strands 22, and the temperature difference can be kept small.

  As shown in FIG. 6, the partition weir 12 may be configured in a straight shape facing the left-right direction instead of the V-shape. That is, the partition weir 12 is configured to extend from one side (left side) to the other side (right side) of the second side wall 19, and at least 2 so that the partition weir 12 has a square shape in plan view. Two runners 21 (first runner 21a, second runner 21b) are provided. Further, as shown in FIG. 7, a reinforcing member 25 may be provided on the tundish 2 of FIG.

  As shown in FIGS. 11 to 14, a circulation hole 26 may be provided in addition to the runway 21 provided in the partition weir 12. That is, in the partition weir 12, between the one runner 21 (first runner 21a) and the other runner 21 (second runner 21b), the first runner 21a and the second runner 21b. Another flow hole 26 may be provided. Unlike the 1st runway 21a and the 2nd runway 21b, the circulation hole 26 is for preventing a molten steel from stagnating in the width direction center side of the tundish 2, The 1st runway 21a and the 2nd runway The inner diameter is smaller than that of the runner 21b.

  Specifically, in FIG. 11, one flow hole 26 is provided in the center in the width direction of the first dam portion 12a. In FIG. 12, two flow holes 26 are formed in the first dam portion 12a with the center line C1 as the center. In FIG. 13, two flow holes 26 are provided on the left and right sides of the first dam portion 12a with the reinforcing member 25 as the center. In FIG. A circulation hole 26 is provided.

15 to 18 are modifications of the appearance of the tundish 2.
FIG. 15 shows a second weir portion that forms a partition weir 12 in the vicinity of a corner portion between the second side walls 19, 19 and the first rear walls 18, 18 with the second side walls 19, 19 having a linear shape extending in the front-rear direction. 12b is connected. FIG. 16 is a diagram in which the first rear walls 18 and 18 are not straight but bent in the middle in the width direction in two stages (the rear wall of the tundish 3 is bent). The first rear walls 18, 18 are shifted to the front side as the distance from the front side of 19 toward the outside, and the rate of shifting to the front side in the middle of the first rear walls 18, 18 is made moderate. FIG. 17 shows the second side walls 19, 19 and the first rear walls 18, 18 in an arc shape so that the second side walls 19, 19 and the first rear walls 18, 18 are continuously connected (tundish 3 The second side walls 19 and 19 and the first rear walls 18 and 18 gradually shift to the front side as they go outward.

  FIG. 18 shows a configuration in which the partition weir 12 constituted by the first dam portion 12a and the second dam portion 12b is constituted by a pair of second dam portions 12b. As it goes from the line C1 to the rear side, it gradually shifts to the outside, and the partition weir 12 is formed in a V shape in plan view. In this way, the partition weir 12 can be easily configured, and the structure of the partition weir 12 is simplified.

  In the embodiment described above, one runway 21 is provided on each of the pair of second dam portions 12b, that is, the left and right sides around the center line C1, but the first dam portion 12a and the second dam portion are provided. A plurality of runners 21 may be provided on one side (left side) or the other side (right side) of 12b. In addition, in order to optimize the distribution and flow velocity of the molten steel discharged from the injection chamber 10, the runner 21 and the flow hole 26 are respectively combined, or the runner 21 and the flow hole 26 are directed upward (water surface). The runway 21 and the flow hole 26 may be inclined downward (bottom).

  As described above, the tundish 2 of the present invention is compact and can handle multiple strands. In addition to the effects described above, tundish-related equipment such as a tundish car that moves the tundish 2 can be made compact. it can. The total amount of the lining refractory constituting the tundish 2 can be reduced, the heat retaining property can be improved, and the manufacturing cost of the slab 4 can be reduced.

It should be noted that matters not explicitly disclosed in the embodiment disclosed this time, such as operating conditions and operating conditions, various parameters, dimensions, weights, volumes, and the like of a component, deviate from the range normally practiced by those skilled in the art. However, matters that can be easily assumed by those skilled in the art are employed.

DESCRIPTION OF SYMBOLS 1 Continuous casting equipment 2 Tundish 3 Mold 4 Slab 5 Support roll 6 Ladle 7 Immersion nozzle 10 Injection chamber 11 Distribution chamber 12 Partition weir 12a 1st weir part 12b 2nd weir part 15 Bottom wall 16 Front wall 17 1st side wall 18 1st rear wall 19 2nd side wall 20 2nd rear wall 21 Runway 21a 1st runway 21b 2nd runway 22 Inlet 22a 1st strand (1st inlet)
22b Second strand (second inlet)
22c 3rd strand (3rd inlet)
22d 4th strand (4th inlet)
22e 5th strand (5th inlet)
22f 6th strand (6th inlet)
25 Reinforcement member 26 Flow hole C1 Center line C2 Strand center line L1 Extension line L2 extending the axis of the first runner P2 Extension war P1 extending the axis of the second runner Target point P2 Target point

Claims (6)

An injection chamber into which molten steel from a ladle is injected, a distribution chamber having a plurality of injection ports for charging the molten steel into a mold, a partition weir for partitioning the injection chamber and the distribution chamber, and provided in the partition weir And a tundish comprising at least two runners for flowing molten steel from the injection chamber to the distribution chamber,
In the distribution chamber, first to sixth inlets are formed in order, and one of the runners formed in the partition weir is connected to the second inlet and the third inlet. A tundish characterized in that the tundish is disposed between the inlets and the other runner is disposed between the fourth inlet and the fifth inlet. An injection chamber into which molten steel from a ladle is injected, a distribution chamber having a plurality of injection ports for charging the molten steel into a mold, a partition weir for partitioning the injection chamber and the distribution chamber, and provided in the partition weir And a tundish comprising at least two runners for flowing molten steel from the injection chamber to the distribution chamber,
In the distribution chamber, first to fifth inlets are formed in order, and one of the runners formed in the partition weir is connected to the second inlet and the third inlet. A tundish characterized in that the tundish is arranged between the inlets, and the other runner is arranged between the third inlet and the fourth inlet. An injection chamber into which molten steel from a ladle is injected, a distribution chamber having a plurality of injection ports for charging the molten steel into a mold, a partition weir for partitioning the injection chamber and the distribution chamber, and provided in the partition weir And a tundish comprising at least two runners for flowing molten steel from the injection chamber to the distribution chamber,
In the distribution chamber, first to fourth inlets are formed in order, and one of the runners formed in the partition weir is connected to the first inlet and the second inlet. A tundish characterized in that the tundish is arranged between the inlets, and the other runner is arranged between the third inlet and the fourth inlet.   The tundish according to any one of claims 1 to 3, wherein the depth of the distribution chamber is gradually narrowed toward the outside along the width direction of the distribution chamber.   The tundish according to any one of claims 1 to 4, wherein a reinforcing member that reinforces the partition weir is provided in a central portion in the width direction of the distribution chamber.   The tank according to any one of claims 1 to 5, wherein the partition weir is provided with a flow hole separately from the runner between the one runway and the other runway. Dish.

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