JP7009246B2 - Molten metal holding container - Google Patents

Description

The present invention relates to, for example, a molten metal holding container applicable as at least one of a hot metal pan, a molten steel pan, and a ladle.

Conventionally, the above-mentioned type of molten metal holding container includes the following (see, for example, Patent Documents 1 and 2). That is, the conventional molten metal holding container is provided with a container-shaped iron skin having an opening that opens on the upper side, a brick layer that covers the inner peripheral surface of the iron skin, and a brick layer that is provided inside the opening of the iron skin. It is equipped with a holding brick that holds down from above.

The lower surface of the presser brick and the upper surface of the brick layer pressed by the lower surface are formed in a plane along the radial direction of the brick layer. Therefore, the joint between the lower surface of the presser brick and the upper surface of the brick layer is a through joint extending linearly along the radial direction of the brick layer.

Jikkenhei 2-93063 Gazette Jikkenhei 2-93064 Gazette

However, the conventional molten metal holding container has the following problems. That is, in the conventional molten metal holding container, when the brick on the inner peripheral side of the brick layer is thermally expanded by the heat of the molten metal such as hot metal or molten steel, the pressing brick is on the upper side and iron due to the pushing force accompanying the thermal expansion. It squeezes outward in the radial direction of the skin. Then, the bullion invades the joint between the lower surface of the presser brick and the upper surface of the brick layer.

At this time, since the joint between the lower surface of the presser brick and the upper surface of the brick layer is a through joint extending linearly along the radial direction of the brick layer, the metal easily invades this joint. For this reason, as the bullion invades the joint, the presser bricks are pushed out more and the bullion may invade deeper on the side closer to the iron skin.

Then, when removing this bullion, the bricks in the brick layer sometimes fell off. When the brick falls off in this way, the molten metal comes into contact with the iron skin at the place where the brick has fallen, so that an opening is generated in the iron skin, and there is a possibility that hot water leakage (leakage of the molten metal) may occur from this opening.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a molten metal holding container capable of preventing the bricks of the brick layer from falling off and eliminating the risk of hot water leakage.

In order to achieve the above object, the molten metal holding container according to one aspect of the present invention includes a container-shaped iron skin having an opening opening on the upper side, a brick layer covering the inner peripheral surface of the iron skin, and the above. It is provided with a presser brick provided inside the opening and presses the brick layer from above, and the lower surface of the presser brick is partly below between the inner peripheral side and the outer peripheral side of the presser brick. A protruding convex portion is formed, and an engaged portion to which the convex portion is engaged is formed on the upper surface of the brick layer, and the lower surface of the holding brick including the convex portion and the engaged portion are formed. The joints between the joints and the upper surface of the brick layer including the horizontal joints are located on the outer peripheral side of the brick layer with respect to the horizontal joints extending in the radial direction of the brick layer from the inner peripheral surface of the brick layer and the brick layer. It is bent including a vertical joint extending in the height direction of the joint and connecting to the horizontal joint.

According to the molten metal holding container according to one aspect of the present invention, a convex portion protruding downward is formed on the lower surface of the presser brick in a part between the inner peripheral side and the outer peripheral side of the presser brick. On the upper surface of the brick layer, an engaged portion in which a convex portion is engaged is formed. The joints between the lower surface of the presser brick including the convex portion and the upper surface of the brick layer including the engaged portion are the horizontal joint extending in the radial direction of the brick layer from the inner peripheral surface of the brick layer and the horizontal joint. It is located on the outer peripheral side of the brick layer with respect to the joint and is bent including the vertical joint extending in the height direction of the brick layer and connecting to the horizontal joint.

Therefore, even if the bullion invades the horizontal joint, the invasion of the bullion can be prevented at the connection portion between the horizontal joint and the vertical joint. As a result, it is possible to suppress the push-out of the presser bricks due to the intrusion of the bullion and prevent the bullion from invading deep into the side close to the iron skin. As a result, when removing the bare metal, it is possible to prevent the bricks of the brick layer from falling off and prevent the molten metal from coming into contact with the iron skin, so that the risk of hot water leakage can be eliminated.

In the molten metal holding container according to one aspect of the present invention, the convex portion is formed on the inner peripheral side of the lower surface of the holding brick, and the engaged portion is opened to the inner peripheral side of the brick layer. It may be a stepped portion.

Further, in the molten metal holding container according to one aspect of the present invention, the convex portion is formed in the central portion between the inner peripheral side and the outer peripheral side on the lower surface of the holding brick, and the engaged portion is the engaged portion. It may be a recess that opens on the upper side of the brick layer.

Further, in the molten metal holding container according to one aspect of the present invention, the convex portion is formed on the outer peripheral side of the lower surface of the holding brick, and the engaged portion is a stepped portion that opens to the outer peripheral side of the brick layer. But it's okay.

Further, in order to achieve the above object, the presser brick according to one aspect of the present invention is a presser brick that presses the brick layer covering the inner peripheral surface of the iron skin provided in the molten metal holding container from above. On the lower surface of the presser brick, a convex portion protruding downward is formed in a part between the inner peripheral side and the outer peripheral side of the presser brick.

According to the presser brick according to one aspect of the present invention, a convex portion protruding downward is formed on the lower surface of the presser brick at a part between the inner peripheral side and the outer peripheral side of the presser brick. When the presser brick is applied to the molten metal holding container, the convex portion formed on the lower surface of the presser brick is engaged with the engaged portion formed on the upper surface of the brick layer. In this state, the joint between the lower surface of the presser brick including the convex portion and the upper surface of the brick layer including the engaged portion is a horizontal joint extending in the radial direction from the inner peripheral surface of the brick layer. , Located on the outer peripheral side of the brick layer with respect to this horizontal joint, and bends including a vertical joint extending in the height direction of the brick layer and connecting to the horizontal joint.

Therefore, even if the bullion invades the horizontal joint, the invasion of the bullion can be prevented at the connection portion between the horizontal joint and the vertical joint. As a result, it is possible to suppress the push-out of the presser bricks due to the intrusion of the bullion and prevent the bullion from invading deep into the side close to the iron skin. As a result, when removing the bare metal, it is possible to prevent the bricks of the brick layer from falling off and prevent the molten metal from coming into contact with the iron skin, so that the risk of hot water leakage can be eliminated.

As described in detail above, according to the present invention, it is possible to prevent the bricks in the brick layer from falling off and eliminate the risk of hot water leakage.

It is a front view which shows by cutting out a part of the molten metal holding container which concerns on 1st Embodiment. It is an enlarged view of the part A of FIG. It is a side view of the presser brick of FIG. It is a side view which shows the modification which added the R shape to the corner part of the presser brick of FIG. It is a figure which shows the modification which provided the concave part double corresponding to the double rib in the presser brick of FIG. It is an enlarged view corresponding to the part A of FIG. 1 in the molten metal holding container which concerns on 2nd Embodiment. It is an enlarged view corresponding to the part A of FIG. 1 in the molten metal holding container which concerns on 3rd Embodiment. It is a figure explaining the molten metal holding container which concerns on a comparative example.

[First Embodiment]
First, the first embodiment of the present invention will be described.

The molten metal holding container 10 shown in FIG. 1 is applied as, for example, at least one of a hot metal pan, a molten steel pan, and a ladle. In FIG. 1, the molten metal holding container 10 is schematically shown. The arrows IN and OUT shown in each figure indicate the inner peripheral side and the outer peripheral side of the peripheral wall portion of the molten metal holding container 10, respectively.

The molten metal holding container 10 is provided with a container-shaped iron skin 12 having an opening that opens on the upper side, a brick layer 14 that covers the inner peripheral surface of the iron skin 12, and a brick that is provided inside the opening of the iron skin 12. A presser brick 16 that presses the layer 14 from above is provided. The brick layer 14 and the presser brick 16 are provided over the entire circumference of the inner peripheral surface of the iron skin 12.

As shown in FIG. 2, a patching material 18 is interposed between the iron skin 12 and the brick layer 14 and between the iron skin 12 and the presser brick 16. The brick layer 14 has a plurality of perm bricks 20 and a plurality of wear bricks 22.

The plurality of perm bricks 20 and the plurality of wear bricks 22 are laminated in the height direction of the iron skin 12, respectively. The plurality of wear bricks 22 are provided inside the plurality of perm bricks 20. The plurality of perm bricks 20 form the outer peripheral side of the brick layer 14, and the plurality of wear bricks 22 form the inner peripheral side of the brick layer 14.

The upper surface of the uppermost perm brick 20 and the upper surface of the uppermost wear brick 22 form the upper surface of the brick layer 14. The upper surface of the brick layer 14 is pressed from above by the lower surface of the presser brick 16 described in detail later.

As shown in FIG. 3, a wire mesh-like metal case 24 is provided on the side surface of the presser brick 16. The adjacent pressing bricks 16 are fixed via the metal case 24.

As shown in FIG. 2, a pair of upper and lower ribs 26 are provided on the inner peripheral surface of the iron skin 12. The pair of upper and lower ribs 26 are formed in a ring shape along the circumferential direction of the iron skin 12. Each rib 26 projects toward the inner peripheral side of the iron skin 12. The upper rib 26 is located at the opening of the iron skin 12.

The presser brick 16 is formed with an outer peripheral surface facing the inner peripheral surface of the iron skin 12, and a recess 28 opening on the outer peripheral side of the presser brick 16 is formed on the outer peripheral surface. An upper rib 26 is engaged with the recess 28 via a patching material 18. The presser brick 16 is fixed to the opening of the iron skin 12 by engaging the upper rib 26 with the recess 28. Further, the presser brick 16 has an inner peripheral surface formed on the side opposite to the outer peripheral surface. This inner peripheral surface is formed so as to be flush with the inner peripheral surface of the brick layer 14.

A convex portion 30 projecting downward is formed on the lower surface of the presser brick 16. The convex portion 30 is a part of the lower surface of the presser brick 16 between the inner peripheral side and the outer peripheral side of the presser brick 16, that is, a part in the direction connecting the inner peripheral side and the outer peripheral side of the presser brick 16. Is formed in. The direction connecting the inner peripheral side and the outer peripheral side of the pressing brick 16 is a direction corresponding to the radial direction of the iron skin 12. In the present embodiment, as an example, the convex portion 30 is formed on the inner peripheral side of the lower surface of the presser brick 16. The convex portion 30 is formed in a rectangular shape in a side view.

The surface of the lower surface of the presser brick 16 excluding the convex portion 30 is formed as a support surface 32. The support surface 32 and the convex portion 30 are formed side by side in a direction corresponding to the radial direction of the iron skin 12, and the convex portion 30 projects downward with respect to the support surface 32. The support surface 32 is located on the outer peripheral side of the holding brick 16 with respect to the convex portion 30. The presser brick 16 has the above-mentioned concave portion and the convex portion 30, so that the presser brick 16 has a substantially F-shape in a side view.

On the upper surface of the brick layer 14, a step portion 34 corresponding to the convex portion 30 and opening to the inner peripheral side of the brick layer 14 is formed. This step portion 34 is an example of the "engaged portion" in the present invention. The step portion 34 is formed by a facing surface facing the lower surface of the convex portion 30 and a facing surface facing the outer peripheral side surface of the convex portion 30.

A convex portion 30 is engaged with the step portion 34 from above. As a result, the joints between the lower surface of the presser brick 16 including the convex portion 30 and the upper surface of the brick layer 14 including the stepped portion 34 are the horizontal joints 36A and 36B extending in the radial direction of the brick layer 14 and the brick layer 14. It is bent including a vertical joint 38 extending in the height direction of the above.

That is, between the lower surface of the convex portion 30 and the facing surface of the step portion 34 facing the lower surface (the upper surface of the uppermost perm brick 20), the radial direction of the brick layer 14 from the inner peripheral surface of the brick layer 14. A horizontal joint 36A extending to is formed. This horizontal joint 36A is an example of the "horizontal joint" in the present invention. Further, a horizontal joint 36B extending in the radial direction of the brick layer 14 is formed between the support surface 32 and the upper surface of the uppermost perm brick 20 facing the support surface 32.

Since the inner peripheral side of the brick layer 14 and the presser brick 16 is melted, the length of the horizontal joint 36A on the inner peripheral side at the time of introduction of the brick layer 14 and the presser brick 16 is along the radial direction of the iron skin 12. It is desirable that the size is 50% or more with respect to the thickness of the brick layer 14 and the presser brick 16.

On the other hand, between the outer peripheral side surface of the convex portion 30 and the facing surface of the stepped portion 34 facing the outer peripheral side surface (the inner peripheral side surface of the uppermost perm brick 20), the brick layer 14 is formed. A vertical joint 38 extending in the height direction is formed. The vertical joint 38 is located on the outer peripheral side of the brick layer 14 with respect to the horizontal joint 36A. The lower end of the vertical joint 38 is connected to the horizontal joint 36A, and the upper end of the vertical joint 38 is connected to the horizontal joint 36B. The vertical joint 38 is an example of the "vertical joint" in the present invention.

In the brick layer 14, the uppermost perm brick 20 and the second perm brick 20 from the top have a single structure, but the plurality of perm bricks 20 from the third to the top are double. It has a structure. The radial direction of the brick layer 14 between the top perm brick 20 and the second perm brick 20 from the top, and between the second perm brick 20 from the top and the third perm brick 20 from the top. A horizontal joint 40 extending to is formed.

Further, in the plurality of perma bricks 20 third and subsequent from the top, horizontal joints 42 extending in the radial direction of the brick layer 14 are formed between the plurality of perma bricks 20 on the inner peripheral side, and the plurality of perma bricks on the outer peripheral side are formed. A horizontal joint 44 extending in the radial direction of the brick layer 14 is formed between 20. Further, a horizontal joint 46 extending in the radial direction of the brick layer 14 is formed between the plurality of wear bricks 22 from the inner peripheral surface of the brick layer 14.

On the other hand, a vertical joint 48 extending in the height direction of the brick layer 14 is formed between the plurality of wear bricks 22 and the plurality of perm bricks 20. Further, in the plurality of perm bricks 20 from the third to the top, the vertical joint 50 extending in the height direction of the brick layer 14 between the plurality of perm bricks 20 on the inner peripheral side and the plurality of perm bricks 20 on the outer peripheral side. Is formed.

By appropriately setting the shapes of the plurality of perm bricks 20 and the plurality of wear bricks 22, the perm between the top perma brick 20 and the second perma brick 20 from the top, and the second perma from the top. The horizontal joint 40 between the brick 20 and the third perm brick 20 is offset in the height direction of the brick layer 14 with respect to the horizontal joint 46 between the plurality of wear bricks 22.

Further, among the plurality of perma bricks 20 from the third to the top, the horizontal joint 42 between the plurality of perma bricks 20 on the inner peripheral side is the brick layer 14 with respect to the horizontal joint 46 between the plurality of wear bricks 22. It is offset in the height direction. Further, in the plurality of perm bricks 20 from the third to the top, the horizontal joints 44 between the plurality of perm bricks 20 on the outer peripheral side are also bricks with respect to the horizontal joints 42 between the plurality of perm bricks 20 on the inner peripheral side. It is offset in the height direction of the layer 14.

The horizontal joint 40 between the top perma brick 20 and the second perma brick 20 from the top, and between the second perma brick 20 and the third perma brick 20 from the top is a plurality of perms. It is connected to the horizontal joint 46 between the plurality of wear bricks 22 via the vertical joint 48 between the brick 20 and the plurality of wear bricks 22.

Further, in the plurality of perma bricks 20 from the third to the top, the horizontal joints 42 between the plurality of perma bricks 20 on the inner peripheral side are the plurality of perm bricks 20 on the inner peripheral side and the plurality of perm bricks 20 on the outer peripheral side. It is connected to the horizontal joint 44 between the plurality of perma bricks 20 on the outer peripheral side via the vertical joint 50 between the two.

Next, the operation and effect of the first embodiment will be described.

First, in order to clarify the action and effect of the first embodiment, a comparative example will be described. FIG. 8 shows a molten metal holding container 110 according to a comparative example. As shown in the upper part of FIG. 8, the molten metal holding container 110 according to the comparative example has a container-shaped iron skin 112 having an opening opening on the upper side and a brick layer 114 covering the inner peripheral surface of the iron skin 112. And the presser brick 116 provided inside the opening of the iron skin 112 and pressing the brick layer 114 from above.

A ring-shaped rib 126 is formed on the inner peripheral surface of the opening of the iron skin 12, and the presser brick 116 has a U-shape (recessed portion 128 in which the rib 126 is engaged via the patching material 118). It is formed in a C shape). Further, the lower surface of the presser brick 116 formed in a U shape and the upper surface of the brick layer 114 pressed by the lower surface are formed in a plane along the radial direction of the brick layer 114. Therefore, the joint between the lower surface of the presser brick 116 and the upper surface of the brick layer 114 is a through joint extending linearly along the radial direction of the brick layer 114.

However, the molten metal holding container 110 according to the above comparative example has the following problems. That is, as shown in the lower figure of FIG. 8, in the molten metal holding container 110 according to the comparative example, when the brick on the inner peripheral side of the brick layer 114 thermally expands due to the heat of the molten metal such as hot metal or molten steel, this Due to the push-up force F accompanying the thermal expansion, the presser brick 116 is pushed upward and radially outward of the iron skin 112. Then, the bullion invades the joint between the lower surface of the presser brick 116 and the upper surface of the brick layer 114.

At this time, since the joint between the lower surface of the presser brick 116 and the upper surface of the brick layer 114 is a through joint extending linearly along the radial direction of the brick layer 114, the metal penetrates into this joint. Cheap. For this reason, as the bullion invades the joint, the presser brick 116 is pushed out more and the bullion may invade deeper on the side closer to the iron skin 112.

Then, when the bullion was removed, the bricks of the brick layer 114 sometimes fell off. When the brick falls off in this way, the molten metal comes into contact with the iron skin 112 at the place where the brick has fallen off, so that an opening is generated in the iron skin 112, and there is a possibility that hot water leakage (leakage of the molten metal) may occur from this opening.

On the other hand, according to the molten metal holding container 10 according to the first embodiment shown in FIG. 2, a convex portion 30 protruding downward is formed on the inner peripheral side of the lower surface of the holding brick 16. A step portion 34 to which the convex portion 30 is engaged is formed on the upper surface of the brick layer 14. The joint between the lower surface of the presser brick 16 including the convex portion 30 and the upper surface of the brick layer 14 including the step portion 34 is a horizontal joint extending in the radial direction from the inner peripheral surface of the brick layer 14. It is bent including 36A and a vertical joint 38 located on the outer peripheral side of the brick layer 14 with respect to the horizontal joint 36A and extending in the height direction of the brick layer 14 and connected to the horizontal joint 36A.

Therefore, even if the bullion invades the horizontal joint 36A on the inner peripheral side, the intrusion of the bullion can be prevented at the connection portion between the horizontal joint 36A and the vertical joint 38. As a result, it is possible to suppress the push-out of the presser brick 16 due to the intrusion of the bullion and prevent the bullion from invading deeply on the side close to the iron skin 12. As a result, when the bare metal is removed, it is possible to prevent the bricks of the brick layer 14 from falling off and prevent the molten metal from coming into contact with the iron skin 12, so that the risk of hot water leakage can be eliminated.

Next, a modified example of the first embodiment will be described.

In the first embodiment, as shown in FIG. 3, the corner portion formed inside the concave portion 28 of the presser brick 16 and the corner portion between the convex portion 30 and the support surface 32 are both at right angles. Is formed in. However, as shown in FIG. 4, the corner portion formed inside the concave portion 28 of the presser brick 16 and the corner portion between the convex portion 30 and the support surface 32 are R-shaped (arc-shaped). The R-shaped portion 52 may be formed.

As described above, when the R-shaped portion 52 is formed in each of the above-mentioned corners, the stress acting on each corner can be relaxed. As a result, it is possible to prevent cracks from occurring in each corner.

Further, in the first embodiment, as shown in FIG. 2, one recess 28 is provided on the outer peripheral surface of the presser brick 16 corresponding to the upper rib 26 formed in the opening of the iron skin 12. It is formed. However, as shown in FIG. 5, even if a pair of upper and lower recesses 28 are formed on the outer peripheral surface of the presser brick 16 corresponding to the pair of upper and lower ribs 26 formed in the opening of the iron skin 12. good.

Further, in the first embodiment, as shown in FIG. 2, a pair of upper and lower ribs 26 are formed on the inner peripheral surface of the iron skin 12, but the lower ribs 26 may be omitted. ..

Further, in the first embodiment, as shown in FIG. 2, only one convex portion 30 is formed on the lower surface of the presser brick 16, but the convex portions 30 are arranged in a direction corresponding to the radial direction of the iron skin 12. A plurality of convex portions 30 may be formed in the above.

Further, the above-mentioned plurality of modifications may be combined as appropriate.

[Second Embodiment]
Next, the second embodiment of the present invention will be described.

In the second embodiment, the structure of the presser brick 16 and its surroundings is changed as follows with respect to the first embodiment described above. That is, as shown in FIG. 6, in the second embodiment, the convex portion 30 is formed in the central portion between the inner peripheral side and the outer peripheral side on the lower surface of the pressing brick 16.

The surfaces of the lower surface of the presser brick 16 excluding the convex portion 30 are formed as support surfaces 32A and 32B. The support surfaces 32A, 32B and the convex portion 30 are formed side by side in a direction corresponding to the radial direction of the iron skin 12. The convex portion 30 projects downward with respect to the support surfaces 32A and 32B on both sides. The support surface 32A is located on the inner peripheral side of the presser brick 16 with respect to the convex portion 30, and the support surface 32B is located on the outer peripheral side of the presser brick 16 with respect to the convex portion 30. In the second embodiment, the lower rib 26 is omitted.

The uppermost part of the brick layer 14 is formed by the wear brick 62. The wear brick 62 is provided from the upper side of the plurality of perm bricks 20 to the upper side of the plurality of wear bricks 22. The upper surface of the wear brick 62 forms the upper surface of the brick layer 14. The upper surface of the brick layer 14 is pressed from above by the lower surface of the presser brick 16.

On the upper surface of the brick layer 14 (the upper surface of the wear brick 62), a concave portion 64 that opens on the upper side of the brick layer 14 corresponding to the convex portion 30 is formed. This recess 64 is an example of the "engaged portion" in the present invention. The recess 64 is formed by a bottom surface of the brick layer 14 facing upward and a pair of facing surfaces of the brick layer 14 facing in the radial direction.

The convex portion 30 is engaged with the concave portion 64 from above. As a result, the joints between the lower surface of the presser brick 16 including the convex portion 30 and the upper surface of the brick layer 14 including the stepped portion 34 are horizontal joints 66A, 66B, 66C extending in the radial direction of the brick layer 14 and bricks. The layer 14 is bent including the vertical joints 68A and 68B extending in the height direction.

That is, between the support surface 32A on the inner peripheral side and the facing surface of the upper surface of the brick layer 14 facing the support surface 32A, a horizontal joint extending in the radial direction from the inner peripheral surface of the brick layer 14 66A is formed. This horizontal joint 66A is an example of the "horizontal joint" in the present invention. Further, a horizontal joint 66B extending in the radial direction of the brick layer 14 is formed between the lower surface of the convex portion 30 and the lower surface of the concave portion 64. Further, a horizontal joint 66C extending in the radial direction of the brick layer 14 is formed between the support surface 32B on the outer peripheral side and the facing surface of the upper surface of the brick layer 14 facing the support surface 32B.

Since the inner peripheral side of the brick layer 14 and the presser brick 16 is melted, the length of the horizontal joint 66A on the inner peripheral side at the time of introduction of the brick layer 14 and the presser brick 16 is along the radial direction of the iron skin 12. It is desirable that the size is 50% or more with respect to the thickness of the brick layer 14 and the presser brick 16.

On the other hand, a vertical joint 68A extending in the height direction of the brick layer 14 is formed between the inner peripheral surface of the convex portion 30 and the one facing surface formed in the concave portion 64. This vertical joint 68A is an example of the "vertical joint" in the present invention. Further, a vertical joint 68B extending in the height direction of the brick layer 14 is formed between the outer peripheral surface of the convex portion 30 and the other facing surface formed in the concave portion 64.

The vertical joint 68A is located on the outer peripheral side of the brick layer 14 with respect to the horizontal joint 66A, and the vertical joint 68B is located on the outer peripheral side of the brick layer 14 with respect to the horizontal joint 66B. The upper end of the vertical joint 68A on the inner peripheral side is connected to the horizontal joint 66A on the inner peripheral side, and the upper end of the vertical joint 68B on the outer peripheral side is connected to the horizontal joint 66C on the outer peripheral side. Further, the lower ends of the pair of vertical joints 68A and 68B are connected to the horizontal joint 66B.

Further, a concave portion 70 is formed on the lower surface of the wear brick 62, and a convex portion 72 is formed on the upper surface of the uppermost wear brick 22 among the plurality of wear bricks 22. The convex portion 72 is engaged with the concave portion 70. The joints between the lower surface of the wear brick 62 including the recess 70 and the upper surfaces of the perma brick 20 and the wear brick 22 located below the wear brick 62 are horizontal joints 76A and 76B extending in the radial direction of the brick layer 14. , 76C and the vertical joints 78A and 78B extending in the height direction of the brick layer 14 are included and bent.

As in the first embodiment, the shapes of the plurality of perma bricks 20 and the plurality of wear bricks 22 are appropriately set, so that the top perma brick 20 and the top two of the plurality of perma bricks 20 are set from the top. The horizontal joint 40 between the second perm brick 20 is offset in the height direction of the brick layer 14 with respect to the horizontal joint 46 between the plurality of wear bricks 22.

Further, among the plurality of perma bricks 20 second and subsequent from the top, the horizontal joint 42 between the plurality of perma bricks 20 on the inner peripheral side is the brick layer 14 with respect to the horizontal joint 46 between the plurality of wear bricks 22. It is offset in the height direction. Further, in the second and subsequent perm bricks 20 from the top, the horizontal joints 44 between the plurality of perm bricks 20 on the outer peripheral side are also bricks with respect to the horizontal joints 42 between the plurality of perm bricks 20 on the inner peripheral side. It is offset in the height direction of the layer 14.

The horizontal joint 40 between the uppermost perma brick 20 and the second perma brick 20 from the top is a plurality of horizontal joints 48 via the vertical joint 48 between the plurality of perma bricks 20 and the plurality of wear bricks 22. It is connected to the horizontal joint 46 between the wear bricks 22.

Further, in the second and subsequent perm bricks 20 from the top, the horizontal joints 42 between the plurality of perm bricks 20 on the inner peripheral side are the plurality of perm bricks 20 on the inner peripheral side and the plurality of perm bricks 20 on the outer peripheral side. It is connected to the horizontal joint 44 between the plurality of perma bricks 20 on the outer peripheral side via the vertical joint 50 between the two.

Next, the operation and effect of the second embodiment will be described.

According to the second embodiment described above, a convex portion 30 projecting downward is formed in the central portion between the inner peripheral side and the outer peripheral side on the lower surface of the presser brick 16, and the brick layer 14 is formed. A concave portion 64 to which the convex portion 30 is engaged is formed on the upper surface. The joint between the lower surface of the presser brick 16 including the convex portion 30 and the upper surface of the brick layer 14 including the concave portion 64 is a horizontal joint 66A extending in the radial direction from the inner peripheral surface of the brick layer 14. And the vertical joint 68A that is located on the outer peripheral side of the brick layer 14 with respect to the horizontal joint 66A and extends in the height direction of the brick layer 14 and is connected to the horizontal joint 66A.

Therefore, even if the bullion invades the horizontal joint 66A on the inner peripheral side, the invasion of the bullion can be prevented at the connection portion between the horizontal joint 66A and the vertical joint 68A. As a result, it is possible to suppress the push-out of the presser brick 16 due to the intrusion of the bullion and prevent the bullion from invading deeply on the side close to the iron skin 12. As a result, when the bare metal is removed, it is possible to prevent the bricks of the brick layer 14 from falling off and prevent the molten metal from coming into contact with the iron skin 12, so that the risk of hot water leakage can be eliminated.

Next, a modified example of the second embodiment will be described.

In the second embodiment, the concave portion 70 is formed on the lower surface of the wear brick 62, and the convex portion 72 is formed on the upper surface of the uppermost wear brick 22 among the plurality of wear bricks 22. However, a convex portion is formed on the lower surface of the wear brick 62, and a concave portion or a step portion to which the convex portion is engaged is formed on the upper surface of the uppermost wear brick 22 among the plurality of wear bricks 22. Is also good.

Further, in the second embodiment, the corner portion formed inside the concave portion 28 of the presser brick 16 and the corner portion between the convex portion 30 and the support surfaces 32A and 32B are both formed at right angles. There is. However, an R-shaped (arc-shaped) R-shaped portion may be formed at these corners.

As described above, when the R-shaped portion is formed in each of the above-mentioned corners, the stress acting on each corner can be relaxed. As a result, it is possible to prevent cracks from occurring in each corner.

Further, other modifications of the first embodiment may be applied to the second embodiment.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.

In the third embodiment, the structure of the presser brick 16 and its surroundings is changed as follows with respect to the first embodiment described above. That is, as shown in FIG. 7, in the third embodiment, the convex portion 30 is formed on the outer peripheral side of the lower surface of the pressing brick 16.

The surface of the lower surface of the presser brick 16 excluding the convex portion 30 is formed as a support surface 32. The support surface 32 and the convex portion 30 are formed side by side in a direction corresponding to the radial direction of the iron skin 12, and the convex portion 30 projects downward with respect to the support surface 32. The support surface 32 is located on the inner peripheral side of the holding brick 16 with respect to the convex portion 30.

On the upper surface of the brick layer 14, a step portion 84 is formed so as to correspond to the convex portion 30 and open to the outer peripheral side of the brick layer 14. The step portion 84 is an example of the "engaged portion" in the present invention. The step portion 84 is formed by a facing surface facing the lower surface of the convex portion 30 and a facing surface facing the inner peripheral side surface of the convex portion 30.

A convex portion 30 is engaged with the step portion 84 from above. As a result, the joints between the lower surface of the presser brick 16 including the convex portion 30 and the upper surface of the brick layer 14 including the stepped portion 84 are the horizontal joints 86A and 86B extending in the radial direction of the brick layer 14 and the brick layer 14. It is bent including a vertical joint 88 extending in the height direction of the above.

That is, a horizontal joint 86A extending in the radial direction from the inner peripheral surface of the brick layer 14 is formed between the support surface 32 and the upper surface of the uppermost wear brick 22 facing the support surface 32. ing. This horizontal joint 86A is an example of the "horizontal joint" in the present invention. Further, a horizontal joint 86B extending in the radial direction of the brick layer 14 is formed between the lower surface of the convex portion 30 and the facing surface of the step portion 84 facing the lower surface (the upper surface of the uppermost perm brick 20). ing.

Since the inner peripheral side of the brick layer 14 and the presser brick 16 is melted, the length of the horizontal joint 86A on the inner peripheral side at the time of introduction of the brick layer 14 and the presser brick 16 is along the radial direction of the iron skin 12. It is desirable that the dimensions are 50% or more with respect to the thickness of the brick layer 14 and the presser brick 16.

On the other hand, the brick layer 14 is located between the inner peripheral surface of the convex portion 30 and the facing surface of the stepped portion 84 facing the inner peripheral surface (the outer peripheral surface of the uppermost wear brick 22). A vertical joint 88 extending in the height direction of the brick is formed. The vertical joint 88 is located on the outer peripheral side of the brick layer 14 with respect to the horizontal joint 86A. The upper end of the vertical joint 88 is connected to the horizontal joint 86A, and the lower end of the vertical joint 88 is connected to the horizontal joint 86B. This vertical joint 88 is an example of the "vertical joint" in the present invention.

As in the first embodiment, the shapes of the plurality of perma bricks 20 and the plurality of wear bricks 22 are appropriately set, so that the top perma brick 20 and the top two of the plurality of perma bricks 20 are set from the top. The horizontal joint 40 between the second perm brick 20 is offset in the height direction of the brick layer 14 with respect to the horizontal joint 46 between the plurality of wear bricks 22.

Further, among the plurality of perma bricks 20 second and subsequent from the top, the horizontal joint 42 between the plurality of perma bricks 20 on the inner peripheral side is the brick layer 14 with respect to the horizontal joint 46 between the plurality of wear bricks 22. It is offset in the height direction. Further, in the second and subsequent perm bricks 20 from the top, the horizontal joints 44 between the plurality of perm bricks 20 on the outer peripheral side are also bricks with respect to the horizontal joints 42 between the plurality of perm bricks 20 on the inner peripheral side. It is offset in the height direction of the layer 14.

The horizontal joint 40 between the uppermost perma brick 20 and the second perma brick 20 from the top is a plurality of horizontal joints 48 via the vertical joint 48 between the plurality of perma bricks 20 and the plurality of wear bricks 22. It is connected to the horizontal joint 46 between the wear bricks 22.

Further, in the second and subsequent perm bricks 20 from the top, the horizontal joints 42 between the plurality of perm bricks 20 on the inner peripheral side are the plurality of perm bricks 20 on the inner peripheral side and the plurality of perm bricks 20 on the outer peripheral side. It is connected to the horizontal joint 44 between the plurality of perma bricks 20 on the outer peripheral side via the vertical joint 50 between the two.

Next, the operation and effect of the third embodiment will be described.

According to the third embodiment described above, a convex portion 30 projecting downward is formed on the outer peripheral side of the lower surface of the presser brick 16, and the convex portion 30 is engaged with the upper surface of the brick layer 14. The formed step portion 84 is formed. The joint between the lower surface of the presser brick 16 including the convex portion 30 and the upper surface of the brick layer 14 including the step portion 84 is a horizontal joint extending in the radial direction from the inner peripheral surface of the brick layer 14. It is bent including 86A and a vertical joint 88 located on the outer peripheral side of the brick layer 14 with respect to the horizontal joint 86A and extending in the height direction of the brick layer 14 and connected to the horizontal joint 86A.

Therefore, even if the bullion invades the horizontal joint 86A on the inner peripheral side, the intrusion of the bullion can be prevented at the connection portion between the horizontal joint 86A and the vertical joint 88. As a result, it is possible to suppress the push-out of the presser brick 16 due to the intrusion of the bullion and prevent the bullion from invading deeply on the side close to the iron skin 12. As a result, when the bare metal is removed, it is possible to prevent the bricks of the brick layer 14 from falling off and prevent the molten metal from coming into contact with the iron skin 12, so that the risk of hot water leakage can be eliminated.

Next, a modified example of the third embodiment will be described.

In the third embodiment, the corner portion formed inside the concave portion 28 of the presser brick 16 and the corner portion between the convex portion 30 and the support surface 32 are both formed at right angles. However, an R-shaped (arc-shaped) R-shaped portion may be formed at these corners.

As described above, when the R-shaped portion is formed in each of the above-mentioned corners, the stress acting on each corner can be relaxed. As a result, it is possible to prevent cracks from occurring in each corner.

Further, other modifications of the first embodiment may be applied to the third embodiment.

Although the first to third embodiments of the present invention have been described above, the present invention is not limited to the above, and can be variously modified and implemented without departing from the gist thereof. Of course there is.

10 Molten metal holding container 12 Iron skin 14 Brick layer 16 Presser brick 20 Perm brick 22 Wear brick 30 Convex part 34 Stepped part (example of engaged part)
36A Horizontal joint 38 Vertical joint 64 Recess (an example of engaged part)
66A Horizontal joint 68A Vertical joint 84 Stepped portion (example of engaged portion)
86A Horizontal joint 88 Vertical joint

Claims (1)

A container-shaped iron skin with an opening that opens on the upper side,
The brick layer covering the inner peripheral surface of the iron skin and
A holding brick provided inside the opening and holding the brick layer from above,
Equipped with
On the lower surface of the presser brick, a convex portion protruding downward is formed in a part between the inner peripheral side and the outer peripheral side of the presser brick.
An engaged portion to which the convex portion is engaged is formed on the upper surface of the brick layer.
The joint between the lower surface of the holding brick including the convex portion and the upper surface of the brick layer including the engaged portion is a horizontal joint extending in the radial direction from the inner peripheral surface of the brick layer. , Which is located on the outer peripheral side of the brick layer with respect to the horizontal joint and is bent including a vertical joint extending in the height direction of the brick layer and connected to the horizontal joint.
The convex portion is formed in the central portion between the inner peripheral side and the outer peripheral side on the lower surface of the holding brick.
The engaged portion is a recess that opens to the upper side of the brick layer.
Molten metal holding container.

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