JP2937993B1 - Furnace support device - Google Patents

Abstract

A furnace support device for supporting a furnace bottom separation type conventional furnace body supports a furnace body load by a support portion provided in a furnace middle part. However, when the furnace body cooling devices are provided in the middle part of the furnace, they interfere with the furnace body support device, which hinders maintenance of the furnace body cooling device. In addition, it was difficult to form a large supporting portion having sufficient strength in such a narrow area in the middle of the furnace. SOLUTION: The furnace body support device has a support portion formed in the vicinity of a furnace shoulder on an upper portion of a furnace body so that the support portion does not interfere with a furnace body cooling device provided in a furnace intermediate portion or the like. And it is comprised so that furnace body load may act on this support part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The invention according to this application is characterized in that the furnace bottom in contact with the molten metal is a refractory lining, and the upper central body and the ceiling are provided with a cooling wall, and the furnace bottom needs to be periodically repaired. And a furnace body support device for a metallurgical furnace.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show an example of a furnace supporting apparatus of a conventionally used metallurgical furnace.

[0003] A furnace body supporting apparatus 101 shown in FIG.
The skirt 133 is attached to a lower portion of the side surface of the skirt 133, and the furnace body load is applied to the skirt 133. The lower end of the skirt 133 is fixed to the floor with foundation bolts.

[0004] Further, in a furnace body supporting apparatus 201 shown in FIG. 8, two annular members 202 are attached to an intermediate portion of a side surface of a furnace body 230 so that a furnace body load acts on the annular members 202. . On both sides of the furnace body, column members 221 are fixed to the floor surface.
2 are supported.

[0005]

A refractory such as a refractory brick is usually laid inside the furnace bottoms of the furnace bodies 130 and 230 as shown in FIGS. Since such refractories gradually wear and deteriorate with the use of a furnace, they need to be repaired periodically. As one of the repair methods, a method of repairing the refractory inside the furnace from the furnace opening has been adopted,
In this case, since the furnace port is usually narrower than the inside of the furnace, the repair requires labor and time. Therefore, instead of the above method, if the furnace bottom is separated, the opening of the furnace body is enlarged, and the furnace bottom is replaced with a spare furnace bottom, the labor and time required for repair can be greatly reduced, and the yield can be improved. Become. However, when the furnace body is of a bottom-separated type, the structure of the furnace body supporting device as shown in FIG. 7 cannot be adopted. Therefore, as shown in FIG. Is adopted. In the furnace body 230 shown in FIG.
When the flanges 243 and 244 are disconnected, the furnace bottom is separated at the boundary. The separated furnace bottom is placed on a carriage 250 and transported.

However, the furnace body may be provided with an auxiliary device such as a cooling device (not shown) for cooling the furnace body itself. In this case, in the furnace body support device of FIG. 8, interference with the above-described accessory device is unavoidable on the outer surface of the furnace intermediate portion, and the structure of the accessory device is complicated, which hinders maintenance. Also, it is difficult to mount an optimal furnace body support device having sufficient size and strength in such a narrow place. If it is forcibly mounted, the furnace body support device must be formed into an unnatural shape, and there is a problem in the manufacture and strength of the furnace. In particular, when the furnace body is large and heavy, the furnace body support device must be increased accordingly, so that it becomes impossible to attach the furnace body support device to a narrow furnace intermediate portion.

According to the invention of the present application, even if an auxiliary device such as a cooling device is provided in the middle part of the furnace, interference with the auxiliary device does not occur, and not only separation of the furnace bottom but also separation of the middle part It is an object of the present invention to provide a furnace body supporting device that enables separation.

[0008]

In order to solve the above-mentioned problems, a furnace body supporting device according to the present invention is provided with a water cooling wall at an intermediate portion of a furnace.
To the furnace support of a metallurgical furnace with water cooling piping
In addition , a support portion is formed near the furnace shoulder at the upper part of the furnace body.
And it is comprised so that furnace body load may act on this support part. Therefore, it is possible to adopt a separation structure in a portion of the furnace body below the formation portion of the support portion, that is, a separation structure not only in the furnace bottom but also in the furnace middle portion. In addition, since the water cooling device and its piping and the support part do not interfere,
Replacement and repair of the water cooling device and the like become easy. Also, water cooling
Since device or the like is not being shielded by the supporting portion, water
Failures such as cooling equipment can be easily found. Further, the shape and size of the support portion are not limited by the arrangement of the water cooling device or the like , and the design flexibility of the support portion is increased.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In a furnace body supporting apparatus according to the present invention, a furnace bottom portion in contact with a molten metal is lined with a refractory,
The interior and ceiling are fitted with cooling walls and the water in the middle of the furnace
Water cooling system piping is provided on the cold wall, and repair of the furnace bottom is required periodically.
A furnace support device for a metallurgical furnace that requires a
A support is formed near the shoulder, and the furnace body load acts on this support.
It is configured to use. With this configuration, it is possible to adopt a structure that separates the furnace bottom and the furnace middle part. In addition, water cooling equipment and its
Interference between the pipe and the support is prevented.

[0010] The furnace body supporting device as described above can be adopted for a furnace body of a furnace bottom separation type. You may comprise so that it may work on a trolley. With this configuration, after the furnace bottom is separated, the upper part of the furnace body can be horizontally moved together with the bogie, and inspection and repair of the furnace bottom become easy.

Various structures can be considered for the structure of the support portion of the furnace body support device. For example, the structure near the furnace shoulder portion of the furnace body can be considered.
Conical skirt member attached to the
A support plate protruding outward from the upper end of the
So that the furnace body load acts on this support plate.
It may be.

Further, in the furnace body supporting device, since the supporting portion is formed relatively above the furnace body, the vibration of the furnace body is likely to occur. However, in order to prevent the vibration, a steadying device is provided. Good. This steady rest device preferably has a structure that is interposed between the furnace body and the floor surface and does not restrain the vertical displacement of the furnace body, but restrains the displacement in the horizontal plane. Although various structures are conceivable as the structure of the steady rest device, for example, it can be constituted by a link mechanism or a slide mechanism.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a furnace body supporting apparatus according to the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a furnace body support apparatus 1 according to an embodiment of the present invention and a furnace body 30 supported by the furnace body support apparatus 1. FIG. 2 is an oblique view of the furnace body support device 1. The furnace body support device 1 mainly includes a support portion 2 and a tower 20. The furnace body support device 1 supports the furnace body load and lifts the furnace body 30 from the floor.

This furnace body 30 is a furnace body of a metallurgical furnace, and its inner wall surface is in contact with a molten metal (molten metal). Therefore, the furnace body 30
Refractory bricks 32 and 36 are laid on the inside in contact with the molten metal. C in FIG. 1 is the surface of the molten metal. Hearth 3
A skirt 33 is attached to the outer surface of the first member. The furnace bottom 31 is configured to be separable. That is, when the connection between the flanges 43 and 44 connected by bolts is released, the furnace body 30 is vertically separated from the line A in FIG. 1 as a boundary. The reason why the furnace bottom is separated is that the maintenance of the firebrick 32 is facilitated. That is, since the refractory brick 32 deteriorates and wears with use, it needs to be repaired periodically, so that the furnace bottom 31 can be separated.
A groove 61 is formed on the floor surface.
And is fixed to the floor surface with foundation bolts 23. A carriage 50 is provided in the groove 61. When separating the furnace bottom 31, the upper plate 52 of the carriage 50 is raised by the cylinder 51 in advance and is brought into contact with the lower end of the skirt 33. Then, the connection between the flanges 43 and 44 is released to apply the load of the furnace bottom 31 to the upper plate 52. Next, the upper plate 52 is slightly lowered, and the carriage 50 is moved. Thereby, the separated furnace bottom 31 is carried out.

A lance 35 for blowing refining oxygen is provided in the furnace.

Further, in the furnace body 30 shown in FIG. 1, no refractory is laid at a portion where the molten metal does not come into contact. However, since this portion also has a considerably high temperature, a refractory or An alternative furnace body cooling device is laid.

As can be understood from FIG. 2, the support portion 2 is composed of a skirt member 3 and four support plates 4. The skirt member 3 has a conical shape that opens upward, and is attached to a furnace shoulder of the furnace body 30.
Each support plate 4 is attached so as to project outward from the upper end of the skirt member 3.

The tower 20 is composed of four pillars 21 whose lower ends are fixed to the floor with foundation bolts 23, and four cross beams 22 installed between the upper ends of adjacent pillars 21. Have been. The lower end of the support plate 4 of the support 2 attached to the furnace body 30 is in contact with the upper surface of the cross beam 22 of the tower 20. The whole furnace body load acts on the support plate 4. In this way, the furnace body load acts on the floor via the support portion 2 and the tower 20, and the furnace body 30 is supported so as to float from the floor.

The furnace body support apparatus 1 is configured as described above. However, since the support portion 2 is formed near the furnace shoulder at the upper part of the furnace body, the conventional furnace body support apparatus is used. There are various advantages. That is, when an auxiliary device such as a furnace body cooling device is provided in an intermediate portion of the furnace or the like, it is difficult to form a support portion having a sufficient size therein. In 1, since the supporting portion 2 is formed above the furnace middle part of the furnace body 30, that is, at the upper part of the furnace body, it does not interfere with the attached device. Therefore, the support portion 2 can be designed to have a size and shape sufficient to support the furnace body load. Further, the maintenance work of the attached device is not hindered by the support portion 2. Further, since the support portion 2 does not obstruct the external appearance of the accessory device, the accessory device can be easily inspected and a failure can be easily found. These effects are obtained for a furnace body in which an auxiliary device such as a furnace body cooling device is provided in the middle of the furnace, and can be obtained even in a furnace body that does not employ a vertically separated structure. It is.

Further, when the supporting portion 2 is formed above the furnace intermediate portion 34 as in the furnace body supporting device 1 of FIG. 1, a structure is provided that separates not only the furnace bottom 31 but also the furnace intermediate portion. Can also. For example, a structure in which the furnace body 30 is vertically separated at the line B in FIG. 1 can be adopted, which contributes to an improvement in the degree of freedom in furnace body design. This effect is an effect obtained not only for a furnace body provided with an accessory device such as a furnace body cooling device in the furnace intermediate section 34 but also for a furnace body not provided with such an accessory device.

Although the structure of the tower 20 is shown in FIGS. 1 and 2, in order to avoid interference between the cooling device and the pillars of the tower,
The structure of the tower 25 shown in FIG.
Is more advantageous.

The tower 25 shown in FIG. 3 has four pillars 21 whose lower ends are fixed to the floor with foundation bolts 23 and four cross beams bridged between the upper ends of adjacent pillars 21. 22 and four substantially triangular top plates 26 disposed on the cross beam 22. The lower end of the support plate 4 of the support 2 attached to the furnace body 30 is in contact with the upper surface of the top plate 26. With such a configuration, the distance from the outer surface of the furnace body 30 to the pillar 21 is further increased, and a larger space is secured around the furnace body 30. Therefore, the interference between the water cooling device to be provided in the furnace middle part and its piping and the pillar 21 is reduced. The top plate 26
May be a beam-shaped member.

Next, the steady rest device will be described with reference to FIGS. A steadying device 70 is provided in the furnace body support device 1 of FIG. Although not shown in FIGS. 1 and 2, the steady rest device 70 is interposed between the base 72 and a portion slightly above the flange 43 on the outer surface of the furnace intermediate portion 34. The structure of this steady rest device 70 is shown in FIG.
As shown in FIG. That is, the link 74 is interposed between the fulcrum member 71 fixed to the furnace body 30 side and the fulcrum member 73 fixed to the base 72 side, and both ends of the link 74 are pivotally supported by the fulcrum members 71 and 73. I have. For the base 72, a portion that does not move relative to the floor may be used. For example, the pillar 21 of the tower 20 may be used as the base 72, or a dedicated pillar as the base 72 may be provided upright on the floor surface. Anti-sway device 70
Is constructed in this manner, the furnace body 30 can be displaced in the vertical direction, but cannot be displaced in the axial direction of the link 74 in the horizontal plane. It is necessary to provide such a steady rest device 70 because if it is not provided, the vibration of the furnace body 30 may increase. That is, when oxygen is blown in by the lance 35 provided in the furnace, the molten metal in the furnace shakes, and the shake of the molten metal tends to cause the furnace body 30 to vibrate. In the furnace body support device 1 of FIG.
Since the furnace body load is supported by the support portion 2 formed relatively above the furnace body 30, the furnace body 30 may be largely vibrated unless the steady rest device 70 is provided. The anti-sway device 70 is for preventing this vibration. The reason why the steady rest device 70 is not restricted to the vertical displacement of the furnace body 30 is to absorb the vertical expansion and contraction of the furnace body 30 due to heat. That is, if the displacement in the vertical direction is restricted, an excessive force is applied not only to the steadying device 70 but also to the furnace body 30 due to the expansion and contraction of the furnace body 30 due to heat.

The structure of the steadying device is not limited to the structure using the link mechanism as shown in FIG. 4, and various structures can be adopted. For example, you may comprise with a slide mechanism.

FIG. 5 is a view showing a steady rest device 75 constituted by a slide mechanism. FIG. 5A is a side view of the steady rest device 75. FIG. 5B is a cross-sectional view taken along the line DD of FIG. 5A. As can be understood from FIG.
The steady rest device 75 includes a sliding member 76 fixed to the furnace body 30 and a rail 77 fixed to the base 72. Also in this case, a portion of the base 72 that does not move relative to the floor surface, for example, a pillar 21 of the tower 20 may be used. The sliding member 76 is loosely fitted to the rail 77 so as to be guided by the rail 77 and slide in the axial direction of the rail 77. The steady rest device 75 restrains the displacement of the furnace body 30 in the horizontal plane. Therefore, it is more effective in the case where the molten metal in the furnace is violently shaken. In addition,
Since the displacement of the furnace body 30 in the vertical direction is not restricted by the steadying device 75, expansion and contraction of the furnace body 30 in the vertical direction due to heat is absorbed.

Next, a furnace supporting apparatus 80 according to another embodiment of the present invention will be described with reference to FIG. FIG. 6 is a perspective view of the furnace body support device 80 and the furnace body 30 supported by the furnace body support device 80.

As shown in FIG. 6, the furnace body supporting device 80 is constituted by the supporting portion 2 and a cart 81.
Pillars 86 are erected on the floor surface.
5 is installed horizontally. The cart 81 is on this rail 85
It can move on rails 85 in the horizontal direction. The structure of the upper part of the bogie 81 is similar to that of the tower 20 shown in FIGS.
The cross beam 22 is erected between the upper ends of the adjacent pillars 82 of the four pillars 82. However, wheels 83 are attached to the lower ends of the pillars 82, so that the cart 81 can move on the rails 85. The structure of the support 2 is shown in FIG.
Is the same as that of the support portion 2. The structure of the furnace body 30 is the same as that of the furnace body 30 in FIG. Since the furnace body support device 80 is configured as described above, when the furnace bottom is separated, only the upper part of the furnace body 30 after separation can be moved by the carriage 81. Therefore, inspection and inspection with the furnace bottom left in place
Repair can be performed, and maintenance becomes easy.
This furnace body support device 80 may be provided with a steady rest device as shown in FIGS. However, furnace body 3
Since the upper part of 0 moves, it is preferable that the steady rest be detachable from the furnace body 30 or the base on the floor side.

[0029]

The present invention is embodied in the form described above and has the following effects.

(1) According to the furnace body support device of the present invention, it is possible to adopt a structure for separating the furnace bottom or the middle part of the furnace. Further, since interference between the water cooling device and its piping and the supporting portion is prevented, failure detection and maintenance of the water cooling device and the like are facilitated. Further, since the shape and size of the support portion are not limited by the arrangement of the water cooling device or the like , the degree of freedom in designing the support portion is increased.

(2) A furnace body support device for supporting a furnace body configured to be capable of separating a furnace bottom, wherein a furnace body load acts on a bogie movable in a horizontal direction via a support portion. In the structure, the upper part of the furnace body can be horizontally moved together with the carriage after the furnace bottom is separated, so that the furnace bottom can be easily inspected and repaired.

(3) Furnace body support device provided with a steady rest device that is interposed between the furnace body and the floor surface and does not restrict the displacement of the furnace body in the vertical direction, but restricts the displacement in the horizontal plane. In
Vibration of the furnace body can be prevented while absorbing vertical expansion and contraction of the furnace body due to heat.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a furnace body support device according to an embodiment of the present invention and a furnace body supported by the furnace body support device.

FIG. 2 is an oblique view of the furnace body support device.

FIG. 3 is an oblique view showing another structure of the tower.

FIG. 4 is a diagram showing a steady rest device constituted by a link mechanism.

FIG. 5 is a diagram showing a steady rest device constituted by a slide mechanism. FIG. 5A is a side view of the steady rest device.
FIG. 5B is a cross-sectional view taken along the line DD of FIG. 5A.

FIG. 6 is a perspective view of a furnace body support apparatus according to another embodiment of the present invention and a furnace body supported by the furnace body support apparatus.

FIG. 7 is a side view showing an example of a conventional furnace support device for a metallurgical furnace.

FIG. 8 is a side view showing another example of a furnace body support device of a conventional metallurgical furnace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Furnace body support apparatus 2 ... Support part 3 ... Skirt member 4 ... Support plate 20 ... Turret 21 ... Pillar 22 ... Cross beam 23 ... Foundation bolt 25 ... Turret 26 ... Top plate 30 ... Furnace body 31 ... Furnace bottom 32 ... Fireproof Brick 33 ... Skirt 34 ... Furnace middle part 35 ... Lance 36 ... Refractory brick 43, 44 ... Flange 50 ... Dolly 52 ... Top plate 51 ... Cylinder 61 ... Groove 70 ... Device 71 ... Support member 72 ... Base 73 ... Support member 74 ... Link 75: Device 76: Sliding member 77: Rail 80: Furnace support device 81: Dolly 82: Leg 83: Wheel 85 ... Rail 86: Column

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-282186 (JP, A) JP-A 5-19896 (JP, U) JP-A 4-97295 (JP, U) JP-A-56 80436 (JP, U) JP-B-57-29530 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) F27B 3/00-3/28 C21C 5/44 C21C 7/00

Claims (6)

(57) [Claims] A furnace bottom in contact with the molten metal, a refractory lining, a furnace middle part above the furnace, and a ceiling provided with a cooling wall ;
A metal body furnace supporting device in which a water cooling pipe is provided on a water cooling wall in an intermediate portion and a furnace bottom needs to be periodically repaired, and a supporting portion is formed near a furnace shoulder at an upper portion of the furnace body, A furnace body support device in which a furnace body load acts on this support portion. 2. The furnace body support device according to claim 1, wherein the furnace body is configured to be able to separate a furnace bottom. 3. The furnace body support device according to claim 2, further comprising a horizontally movable carriage, wherein the furnace body load acts on the carriage via the support portion. 4. The support part comprises a conical skirt member attached near a furnace shoulder of the furnace body and a support plate projecting outward from an upper end of the skirt member. The furnace body support device according to any one of claims 1 to 3, wherein a furnace body load is applied to the furnace body. 5. A steady rest device, wherein the steady rest device is interposed between the furnace body and a floor surface, and the steady rest device does not restrict the vertical displacement of the furnace body, The furnace body support device according to any one of claims 1 to 4, which restrains displacement. 6. The furnace body supporting device according to claim 5, wherein said steady rest device is constituted by a link mechanism or a slide mechanism.