JP2003329371A - Water cooling structure for high temperature atmosphere - Google Patents

Abstract

[PROBLEMS] To provide a water-cooled structure used in a high-temperature atmosphere, particularly a water-cooled structure that can be used in an atmosphere requiring excellent heat resistance and durability. SOLUTION: A portion of a structure 1 facing a high-temperature atmosphere is constituted by a plurality of steel pipes 2 each having a water passage 10 therein, and adjacent steel pipes 2 are arranged so as to be in axial contact with each other.
A water-cooled structure for a high-temperature atmosphere, wherein adjacent steel pipes are not fixed at a mutual contact portion. Steel pipe 2
Is supported by the member 4 of the structure on the side opposite to the high-temperature atmosphere of the steel pipe 2. It is constituted by a plurality of steel pipes 2 having a water channel inside, and the adjacent steel pipes are arranged so as to be in axial contact with each other to form a planar or curved structure,
A water-cooled structure for a high-temperature atmosphere, wherein each of the steel pipes 2 is suspended from an anti-high-temperature atmosphere side so as to be relatively movable while maintaining the front-back arrangement. An annularly formed steel pipe 2 is arranged.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a water-cooled structure used in a high temperature atmosphere.

[0002]

2. Description of the Related Art In a structure constituting an apparatus for handling a high temperature atmosphere such as a high temperature heating furnace or a metal melting and refining furnace, the structure itself is formed of a metal such as steel in order to secure necessary rigidity, and at the same time, the structure is formed. Some heat-resistant measures need to be taken to protect the body from the hot ambient environment. As a heat-resistant measure, a method of preventing a temperature rise of the metal structure by forming a refractory layer between the structure made of metal and a high temperature atmosphere, and a temperature rise of the metal structure with a water cooling structure of the metal structure And a method of using these in combination are adopted.

As a method of applying a refractory layer to a structure to perform heat treatment, for example, in the case of a molten metal container, a refractory brick layer is constructed on the inner surface of a steel ladle, or a castable refractory layer. To build. When a refractory layer is formed on the downward surface such as the inner peripheral surface of the pot lid, it is difficult to construct the refractory brick, so that the stat bolt is formed on the surface of the metal plate 17 as shown in FIG. 6A. The method of forming 19 and forming the castable refractory layer 18 is adopted.

In the method of making the metal structure a water cooling structure, as shown in FIG. 6 (b), the structure is made into a metal plate double structure and a cooling water flow path is provided between two metal plates (20a, 20b). Method for providing (jacket method), method for removing heat by bringing cooling water pipe 21 into contact with metal plate 17 constituting the structure as shown in FIG. 6 (c), and multiple cooling as shown in FIG. 6 (d) A method is adopted in which the water pipes 21 are arranged in one row and joined to each other, and the cooling water pipe row itself is a metal structure. For example, in the converter exhaust gas recovery device arranged above the converter furnace port, a flue for sucking high temperature converter exhaust gas,
A cooling water panel in which a large number of cooling water pipes are arranged and joined together is used for the skirt provided between the converter furnace mouth and the flue.

In the method of forming the cooling water pipe array itself as a metal structure, a joining structure as shown in FIGS. 6 (e) to 6 (g) can be adopted. 6 (e) shows that the contact portions of the arranged cooling water pipes 21 are joined by welding, and the one shown in FIG. 6 (f) has fins 15 provided between adjacent cooling water pipes 21. 6 (g) is one in which the flat portion 16 is provided on one surface of the array of cooling water pipes and joined.

In molten steel refining using a converter, molten slag formed in the converter during refining may foam, expand, and overflow from the converter furnace port, which is called sloping. In addition, molten steel itself may be ejected from the converter furnace port, which is called spitting. The skirt provided directly above the converter furnace port is arranged at a portion that directly receives the scattering of the sloping slag and the spitting molten steel, and particularly requires high heat resistance and durability.

In ladle refining in which molten steel in a ladle is stirred to perform slag refining, a structure for blocking splashes and waves of slag and molten steel may be arranged in a space above the surface of the slag. . In this structure as well, slag or molten steel generated from the molten molten steel adheres to the structure and exerts a severe thermal mechanical impact on the structure. Therefore, the structure is required to have high heat resistance and durability. Conventionally, in such a structure, a stud bolt is embedded in the surface of a steel shell, and the shell is covered with a castable refractory material to realize a shape having heat resistance. Further, a water cooling structure in which cooling water pipes are joined to each other is arranged inside the refractory to improve heat resistance.

[0008]

In a structure used in a high temperature atmosphere that requires high heat resistance and durability,
In some cases, sufficient heat resistance and durability could not be obtained with conventional heat resistant structures using refractory materials and cooling water piping. For example, in the skirt of the converter exhaust gas recovery device, cracks are likely to occur at the joints between the cooling water pipes and the fins in the cooling water panel, and the life of the structure cannot be maintained sufficiently high. In addition, in the structure placed directly above the slag surface in ladle refining, splashes and waves of slag and molten steel fly violently, and they are subjected to thermal, mechanical and chemical shocks,
In the conventional structure in which the shell is covered with castable refractory, the refractory coating is peeled off, and the refractory layer cannot exhibit sufficient durability. Even when the water-cooled structure in which the cooling water pipes were joined to each other was provided inside the refractory layer, cracks occurred at the joints, and the durability of the structure could not be sufficiently maintained.

It is an object of the present invention to provide a water-cooled structure used in a high temperature atmosphere, particularly a water-cooled structure which can be used in an atmosphere where excellent heat resistance and durability are required.

[0010]

That is, the gist of the present invention is as follows. (1) In the structure 1 arranged to face the high temperature atmosphere, the portion of the structure 1 facing the high temperature atmosphere has the water channel 1 inside.
A high-temperature atmosphere characterized by being constituted by a plurality of steel pipes 2 each having a size of 0, and arranging adjacent steel pipes 2 so as to contact each other in the axial direction, and adjoining steel pipes are not fixed at mutual contact portions. Water cooling structure. (2) The water-cooled structure for high-temperature atmosphere according to (1) above, wherein the steel pipe 2 is supported by the member 4 of the structure on the side 32 opposite to the high-temperature atmosphere of the steel pipe 2. (3) A plurality of steel pipes 2 each having a water channel inside are arranged, and adjacent steel pipes are arranged so as to be in contact with each other in the axial direction to form a planar or curved structure, and each steel pipe 2 is front and rear. A water-cooled structure for a high-temperature atmosphere, characterized in that the water-cooled structure is suspended from the anti-high-temperature atmosphere side so as to be relatively movable while maintaining the arrangement. (4) The water-cooled structure for a high temperature atmosphere according to any one of the above (1) to (3), characterized in that the steel pipe 2 formed in an annular shape is arranged. (5) The water-cooled structure for a high-temperature atmosphere according to (4), wherein the arrangement of the steel pipes 2 in the vertical cross section of the structure 1 in the radial direction is U-shaped. (6) The water-cooled structure for a high temperature atmosphere according to any one of the above (1) to (3), wherein the linear steel pipe 2 is arranged. (7) The above (1) is characterized in that the steel pipe 2 is arranged at a position where the molten metal splash or wave directly adheres to the steel pipe 2.
A water-cooled structure for high temperature atmosphere according to any one of (1) to (6).

When the cooling water pipes are arranged in a line to form a cooling water panel, in the conventional structure in which the contact portions of the cooling water pipes adjacent to each other are joined, the joining portions are always exposed to a high temperature atmosphere. Among the parts exposed to the high temperature atmosphere, in the part where the wall thickness of the member is the wall thickness of the cooling water pipe itself, since the wall thickness is thin, it is possible to fully enjoy the cooling effect of the cooling water. The temperature is kept low. On the other hand, in the portion where the adjacent pipes are joined together, in any of the structures shown in FIGS. 6E to 6G, the distance from the position in contact with the cooling water is long, and the temperature of the joined portion must be high. I don't get. Therefore, a temperature difference occurs between the joint part and the cooling water pipe part,
Thermal stress is generated due to the temperature difference. Further, as described above, since the joining portion of the adjacent cooling water pipes has a high temperature, the mechanical strength is weak, and when a thermal stress is applied, a crack will be generated starting from the joining portion. In a part such as a skirt installed at the converter furnace port where the heat load from the high temperature atmosphere is particularly heavy, a crack occurs at the joint part between the cooling water pipes due to this thermal stress, and this crack causes The frequency of skirt repairs increased, which in turn caused shortening of skirt life.

In the present invention, since the adjacent steel pipes are not fixed to each other at their contacting portions, the thermal stress due to the above-mentioned joining is not generated, and therefore the structure is cracked. It does not increase the frequency of repairs or shorten the service life.

Further, the steel pipe 2 is provided on the side opposite to the high temperature atmosphere 33 of the steel pipe.
In FIG. 1, it is supported by the member 4 of the structure (FIG. 1A), or each steel pipe 2 is suspended from the anti-high temperature atmosphere side 33 so as to be relatively movable while maintaining the front-rear arrangement (FIG. 1A).
(B)). Since the portion supporting the steel pipe as a structural member of the structure is the anti-high temperature atmosphere side 33, the temperature of the supporting portion does not rise abnormally, and the supporting portion does not cause thermal stress or decrease in high temperature strength. Therefore, the supporting portion is not cracked.

Further, although the cooling water flows through the inside, the temperature rises because the steel pipe 2 faces the high temperature atmosphere. Therefore, the degree of thermal expansion of the steel pipe 2 may be larger than the degree of thermal expansion of the entire structure, and the steel pipe 2 is
When it is rigidly adhered, thermal stress may occur in the adhered part. Even if thermal stress is generated, in the embodiment in which the steel pipe 2 is supported by the member 4 of the structure on the side opposite to the high temperature atmosphere 33 of the steel pipe 2, the temperature of the supporting portion is low and sufficient strength is maintained. , Cracks do not occur due to thermal stress. Furthermore, in a mode in which each steel pipe is suspended from the anti-high temperature atmosphere side so as to be relatively movable while maintaining the front-rear arrangement, thermal stress is generated even if the steel pipes are thermally expanded because they are supported so as to be relatively movable. It is possible to obtain more preferable results without doing so.

Since the present invention has high durability for use in a high temperature atmosphere as described above, the skirt arranged at the converter furnace mouth or the position where droplets or waves of molten metal directly adhere to the skirt. It is possible to exhibit excellent heat resistance and durability in a structure that is used in a particularly severe environment such as the structure arranged in.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In a structure arranged to face a high temperature atmosphere, the thermal / mechanical / chemical load applied to the structure often differs depending on its site. The present invention is applied to the portion of the structure facing the high temperature atmosphere, and particularly to the portion where the conventional cooling structure cannot exhibit sufficient heat resistance due to a heavy heat load, and the inside of the structure is the water channel 10. The plurality of steel pipes 2 are arranged so that the adjacent steel pipes 2 are arranged so as to contact each other in the axial direction, and the adjacent steel pipes 2 are not fixed to each other at their contact portions. The steel pipe 2 having the water channel 10 inside can keep the temperature of the steel pipe at a low temperature even in a high temperature atmosphere by circulating the cooling water 9 in the water channel. On the other hand, in a part of the structure where the thermal load is not so severe, for example, in a part of the structure that does not face the high temperature atmosphere, or in a part that faces the high temperature atmosphere but does not come into direct contact with the molten metal. Are heat-resistant structures that have been conventionally used, for example, those in which cooling water pipes are fixed to each other at a contact portion to form a panel (FIGS. 6 (e) to (g)), or a heat-resistant structure with a refractory coating on the surface. (FIG. 6A) can be adopted.

In the structure of the present invention, the steel pipes 2 themselves can be made to function as a part of the structure 1 or the surface of the structure 1 by arranging the adjacent steel pipes so as to contact each other in the axial direction. it can. Each structure used in a high temperature atmosphere needs to function as a structure. For example, in the case of a skirt of the converter furnace throat, it has the function of preventing the converter exhaust gas from leaking from the furnace port and guiding the exhaust gas to the upper exhaust gas duct, and the slag and molten steel that are about to overflow from the converter furnace port. It has a function to prevent the leakage of the gas to the outside of the furnace.
Further, in the structure that is arranged above the slag surface in ladle refining, the structure for blocking the splashes and waves of slag and molten steel is equipped with robustness against splashes and waves of molten metal. Need to be In the present invention, adjacent steel pipes are arranged so as to be in contact with each other in the axial direction, each steel pipe does not sway independently due to an external force, maintains mutual close contact, and retains the outer shape as a structure. Therefore, it is possible to ensure the robustness of each structure that each structure should have. On the other hand, since adjacent steel pipes are not fixed at the mutual contact parts,
It is possible to prevent the decrease in strength and the occurrence of thermal stress due to the temperature rise of the fixed portion, and the occurrence of cracks in the structure does not occur.

In the preferred embodiment of the invention, FIG.
As shown in (a), the steel pipe 2 constituting the structure is supported by the member 4 of the structure 1 on the side 33 opposite to the high temperature atmosphere of the steel pipe 2. As a form of support, it is possible to employ a method in which a steel plate is welded to the anti-high temperature atmosphere side 33 of the steel pipe 2 to form the support tool 3, and the support tool 3 is fixed to the member 4 of the structure. Regarding the fixation of the support 3 and the member 4 of the structure,
The optimum method can be selected from a method of screwing, a method of welding and joining. Since the steel pipe 2 is supported by the member 4 of the structure, the steel pipe 2 can have sufficient rigidity as a part of the structure. On the other hand, steel pipe 2
Is supported on the anti-high temperature atmosphere side 33, and the temperature rise on the anti-high temperature atmosphere side 33 is small. Therefore, even if thermal stress occurs due to the difference in thermal expansion between the steel pipe and the structural member, the thermal stress does not cause cracks in the support portion. Further, by adjusting the length and thickness of the steel plate joined to the steel pipe as the support tool 3, it is possible to absorb the generated thermal stress by elastic deformation of the steel plate.

In a further preferred embodiment of the present invention,
As shown in FIG. 1 (b), it is composed of a plurality of steel pipes 2 having water channels inside, and adjacent steel pipes are arranged so as to contact each other in the axial direction to form a planar or curved structure. . The steel pipes 2 constituting the structure are suspended from the anti-high temperature atmosphere side so that the steel pipes 2 can be relatively moved while maintaining the front-rear arrangement. As a form of suspension, the handle 5 is joined to the anti-high temperature atmosphere side 33 of the steel pipe, and the hook 6 is provided inside the structure.
Is arranged, and the handle 5 and the hook 6 are connected to each other by the hanger 7. Since the respective steel pipes are supported so as to be relatively movable and the members inside the structure and the steel pipes are not fixedly supported, thermal stress does not occur at the joint between the steel pipe 2 and the handle 5. Further, since the handle 5 of the steel pipe is arranged on the side of the anti-high temperature atmosphere 33, the handle portion is maintained at a low temperature and the strength of the handle portion can be sufficiently maintained. Each steel pipe is suspended so that it can move relative to each other, but the steel pipe group as a whole is robust enough to form a structure based on the weight of each steel pipe, the suspension force, and the positional relationship between steel pipes. can do. Note that FIG.
In (b), the heat source 31 is at the lower end of the structure 1.
The suspended steel pipe 23 of the present invention is arranged in the vicinity of the above, and the steel pipe 24 joined to the conventional steel pipe contact portion is arranged in the side surface portion which is not subjected to the heat load from the heat source 31.

As a structure arranged in a high temperature atmosphere,
In many cases, a structure having a cylindrical shape is used. The skirt arranged in the converter furnace mouth, the cylinder arranged in the space above the molten steel slag surface in ladle refining, etc. are all cylindrical in shape. When applying the present invention to a structure having such a shape, it is preferable to dispose a steel pipe 2 formed in an annular shape as shown in FIG. For example, in the skirt arranged at the converter furnace opening, the inner peripheral surface of the cylindrical structure faces the high temperature atmosphere. On this inner peripheral surface 34, the steel pipes 2 formed in an annular shape are arranged so that adjacent steel pipes are in contact with each other in the axial direction. The diameter of the annular ring of the steel pipe constitutes the diameter of the inner peripheral surface 34 of the skirt. Steel pipe 2
It is preferable that the steel pipe 2 is fixed to and supported by the member 4 of the structure on the side opposite to the high temperature atmosphere 33, that is, inside the skirt structure.

Since the cooling water flows through the annularly shaped steel pipe, as shown in FIG. 3, the steel pipe 2 is housed inside the structure at the meeting portion 11 of the annularly shaped steel pipe 2, and the cooling water supply portion 12 and The steel pipe may be formed so as to form the cooling water discharge part 13. The cooling water supply unit 12 and the cooling water discharge unit 13 may be arranged at one location on the circumference as shown in FIG. 3A, but the heat load on the structure is large, and the annular steel pipe is cooled by the cooling water. If the cooling water temperature rises too much after one round, the cooling water supply unit 12 and the cooling water discharge unit 13 may be arranged at two or more positions on the circumference, as shown in FIG. 3B. Since the cylinder used in ladle refining is exposed to a severe high temperature atmosphere on both the inner and outer peripheral surfaces of the cylinder, it is preferable to arrange a steel pipe formed into an annular shape by applying the present invention to both the outer peripheral surface and the inner peripheral surface.

In the cylinder arranged in the space above the molten steel slag surface in ladle refining, the severest heat load because the lower end of the cylinder is closest to the molten steel surface and the lower end surface faces the molten steel surface. Receive. In such a part,
Figure 1 shows the radial arrangement of steel pipes in the vertical cross section of the structure.
It is preferably U-shaped as shown in (b). In the U-shaped lower end semicircular portion, the inside of the structure, that is, the steel pipe 2
It is possible to suspend the steel pipes 2 from the anti-high temperature atmosphere side 33, and it is possible to suspend a plurality of steel pipes 2 using the single hook 6. Steel pipes that are adjacent to each other in the radial arrangement of steel pipes in the vertical cross section of the structure form a semi-circular shape, so even if the steel pipes are not joined at their contact parts, they are hard to deform due to external force. A structure can be constructed. Therefore, each steel pipe is fixed so as to be relatively movable while maintaining the front-rear arrangement. It is preferable to adopt the same structure for the lower end portion of the converter furnace skirt.

In the structure of the steel pipe of the present invention, which is disposed at the position where the splash or wave of molten metal directly adheres to the steel pipe, such as a cylinder disposed in the space above the molten steel slag surface in ladle refining, the structure is Since the heat load on the body, particularly the heat load on the lower end of the cylinder, is too great to exhibit sufficient durability in any of the conventional cooling structures, application of the present invention is sufficiently practical. Since the durability that withstands the property can be exhibited, the features of the present invention are most effectively exhibited.

The outer peripheral portion of the converter throat skirt has a smaller heat load than the inner peripheral portion and the lower end portion, so that a conventionally used cooling structure can be adopted. For example, as shown in FIG. 2, a water-cooled panel structure in which cooling water pipes are joined via fins 15 can be used. In the example of FIG. 2, a steel pipe is arranged in a U shape at the lower end of the structure 1, and the steel pipe 2 is suspended from the inside of the structure, that is, the side 33 opposite to the high temperature atmosphere of the steel pipe 2. ing.

As the arrangement of the steel pipes, in addition to the method of arranging the steel pipes formed in the annular shape in the circumferential direction of the cylindrical structure as described above, the steel pipes 2 formed in the U shape as shown in FIG. A method of arranging in the axial direction of the shaped structure may be adopted.

When the structure has a planar shape, or when the structure has a cylindrical shape and the heat load at both ends of the cylinder is not so high, as shown in FIG. 5, the steel pipe constituting the present invention. As for 2, a straight steel pipe may be arranged.

[0027]

Embodiments of the present invention will be described with reference to the drawings. First, FIG. 7 shows the structure of a conventional general converter OG hood.
As an outline of this structure, the lower hood 4 is provided above the converter port 41.
2, a lower skirt 43 disposed between the converter port 41 and the lower hood 42 has a mechanism for moving up and down by a hydraulic cylinder 44. The conventional lower skirt 43 has a modified water pipe 45 as shown in the enlarged view of FIG.
6 are arranged in parallel, and adjacent ones are joined by welding, as shown in FIG.
Although the structure shown in (g) is used, cracks in the joint are likely to occur due to heat load during operation, and the growth of the cracks causes
When the crack propagates to the water channel side of the water pipe 45, water leakage may be induced, and as a result, a large trouble such as a steam explosion due to the water leakage may occur. In addition, the operation will be forced to be stopped for the repair of the location. Therefore, the structure of the lower skirt 43 has a structure shown in FIG. 1 (a) in which adjacent water cooling pipes are not joined and each water cooling pipe is independently supported from the surface opposite to the heat load. When water was supplied and drained with the structure shown in (), no cracks were generated in the piping and the supporting portion, the shape of the lower skirt 43 could be maintained for a long period of time, and the life was 1.5 times or more longer than the conventional life.

[0028]

According to the present invention, since adjacent steel pipes are not fixed to each other at their contact portions, thermal stress due to joining is not generated, and therefore the structure is cracked and the repair frequency is low. It does not increase or shorten the life. Since the steel pipes are supported by the structural members on the anti-high temperature atmosphere side of the steel pipes, or each steel pipe is suspended from the anti-high temperature atmosphere side so as to be relatively movable while maintaining the front-rear arrangement, the temperature of the supporting part is abnormal. Since there is no rise in temperature and no thermal stress or reduction in high temperature strength occurs in the supporting portion, no cracking occurs in the supporting portion.

Further, since the steel pipe is supported by the member of the structure on the anti-high temperature atmosphere side and the temperature of the supporting portion is low and sufficient strength is maintained, even if thermal stress occurs, cracks are generated by the thermal stress. There is nothing to do. Furthermore, since each steel pipe is suspended from the anti-high temperature atmosphere side so as to be relatively movable while maintaining the front-rear arrangement, thermal stress does not occur even if the steel pipes thermally expand.

Since the present invention has high durability for use in a high temperature atmosphere, it is arranged at a skirt arranged at the converter furnace mouth or at a position where splashes or waves of molten metal are directly deposited. It is possible to exhibit excellent heat resistance and durability in a structure used particularly in a severe environment such as a structure.

[Brief description of drawings]

FIG. 1 is a view showing a cross section of a water-cooled structure for a high temperature atmosphere of the present invention, where (a) is a structure supported by a member of the structure on the anti-high temperature atmosphere side of a steel pipe, and (b) is an anti-high temperature atmosphere side. It is a figure which shows the structure suspended from.

2A and 2B are views showing a water-cooled structure for a high temperature atmosphere in which an annularly formed steel pipe of the present invention is arranged, wherein FIG. 2A is a perspective sectional view and FIG. 2B is a partial sectional view.

FIG. 3 is a view showing an annularly shaped steel pipe of the present invention.

FIG. 4 is a view showing a cross section of a water-cooled structure for high temperature atmosphere of the present invention.

FIG. 5 is a view showing a water-cooled structure for high temperature atmosphere, in which a straight steel pipe of the present invention is arranged.

FIG. 6 is a view showing a conventional heat-resistant structure, (a) is a structure having a refractory layer, (b) is a cooling structure in which a cooling water channel is formed between two metal plates, and (c) is a metal. Cooling structure in which cooling water pipes are arranged on a plate, (d) is a cooling structure in which a large number of cooling water pipes are joined to each other, (e) is a cooling structure in which contact portions of adjacent cooling water pipes are joined, and (f) is adjacent It is a figure which shows the cooling structure which formed the fin between the cooling water piping which carries out, and (g) made the one surface of the water cooling structure the flat part.

FIG. 7 is a cross-sectional view showing the structure of a conventional converter OG hood, (a) is a cross-sectional view of the lower part of the OG hood, and (b) is an enlarged partial cross-sectional view showing the structure of the lower skirt.

[Explanation of symbols]

1 structure 2 steel pipe 3 Supports 4 members 5 handle 6 hooks 7 suspenders 9 cooling water 10 waterways 11 encounter department 12 Cooling water supply unit 13 Cooling water outlet 14 Weld 15 fins 16 Plane 17 panels 18 Refractory layer 19 Stud bolt 20 metal plate 21 Cooling water piping 22 Steel pipe supported on the anti-high temperature atmosphere side of the present invention 23 Suspended steel pipe of the present invention 24 Conventional steel pipe with joined steel pipe contact parts 31 Heat source 32 High temperature atmosphere side 33 Anti-high temperature atmosphere side 34 Inner surface 41 Converter port 42 Lower hood 43 Lower skirt 44 hydraulic cylinder 45 water pipe

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tsutomu Tanaka             12 Nakamachi, Muroran-shi Nippon Steel Corporation Muro             Orchid Works (72) Inventor Tetsuya Kato             12 Nakamachi, Muroran-shi Nippon Steel Corporation Muro             Orchid Works (72) Inventor Jun Aoki             12 Nakamachi, Muroran-shi Nippon Steel Corporation Muro             Orchid Works F-term (reference) 3L044 BA06 CA12 DB01 KA04                 4K051 HA09 HA12

Claims (7)

[Claims] 1. A structure arranged to face a high temperature atmosphere, wherein a portion of the structure facing the high temperature atmosphere is composed of a plurality of steel pipes having water channels inside, and adjacent steel pipes are connected to each other. A water-cooled structure for a high temperature atmosphere, wherein the steel pipes are arranged so as to be in contact with each other in an axial direction, and adjacent steel pipes are not fixed to each other at a contact portion. 2. The water-cooled structure for a high-temperature atmosphere according to claim 1, wherein the steel pipe is supported by a member of the structure on the anti-high temperature atmosphere side of the steel pipe. 3. A plurality of steel pipes having water channels inside, and adjacent steel pipes are arranged so as to be in contact with each other in the axial direction to form a flat or curved structure, and each steel pipe is front and rear. A water-cooled structure for a high-temperature atmosphere, characterized in that the water-cooled structure is suspended from the anti-high-temperature atmosphere side so as to be relatively movable while maintaining the arrangement. 4. The water-cooled structure for high temperature atmosphere according to claim 1, wherein a steel pipe formed in an annular shape is arranged. 5. The water-cooled structure for high temperature atmosphere according to claim 4, wherein the arrangement of the steel pipes in the vertical cross section of the structure in the radial direction is U-shaped. 6. The water-cooled structure for a high temperature atmosphere according to claim 1, wherein a straight steel pipe is arranged. 7. The water-cooled structure for a high temperature atmosphere according to claim 1, wherein the steel pipe is arranged at a position where molten metal splashes or waves directly adhere to the steel pipe.