KR101522567B1 - Blast furnace bottom structure - Google Patents

Abstract

There is provided a leg member 113 which forms a gap portion 50 extending in the horizontal direction between a body member (the nose mantle 10) constructed on the base member 5 and a heat member A cooling pipe 118 is formed as a heat conduction shielding means. Since the air gap portion 50 is an air layer, the heat conduction is suppressed and the heat conduction of the leg member 113 is suppressed by the cooling by the cooling tube 118. [ At the time of disassembly of the furnace body, it is possible to separate the furnace body 5 from the furnace body 5 by using the air gap portion 50.

Description

{BLAST FURNACE BOTTOM STRUCTURE}

The present invention relates to a furnace bottom structure of a blast furnace and can be used in a furnace for building a furnace body on a foundation.

The blast furnace is formed by building a furnace body on a foundation.

In order to reduce the construction period, in recent years, the furnace ring block is assembled in advance at a different work site, and the furnace ring block is returned to the installation site for the purpose of shortening the construction period. (See Patent Document 1, etc.).

In this block method, the nose mantle at the lowermost portion of the furnace ring block is constructed on the bottom beam, transported on a foundation, and fixed on the foundation.

In addition, it is also possible to perform on-the-spot assembly on the basis of only the nosepiece part, to manufacture the nosepiece ring block on other parts in parallel at the work site, and to transfer it to the installation site to connect it to the nosy part.

In the above-described installation of the nosepiece mantle, it is general to mount the bottom beam that is constructed on the upper surface of the noser mantle on the foundation, and to fill the mortar therebetween. The mortar solidifies to the foundation downward.

When building the noger mantle on the foundation, refractory bricks are stacked on the upper panel (bottom plate) of the bottom beam, and the mortar is filled under the upper panel to transmit the load to the foundation. Thus, the base to the furnace are integrated.

In the conventional furnace structure described above, since the furnace body is integrated from the bottom to the base, there is a problem that heat in the furnace is easily transmitted to the base.

On the other hand, a water-cooled pipe is provided on the inside of the bottom beam and on the surface of the base, or a water-cooled pipe is provided in the base even when the bottom beam is not used (see Patent Document 2, etc.).

19 and 20 illustrate a conventional water-cooled furnace structure 90. As shown in FIG. 19 and 20 are vertical cross-sectional views viewed from directions orthogonal to each other. In each drawing, the furnace body 91 is constructed on the bottom beam 92.

The bottom beam 92 has a frame in which the sections 93A and 93B are assembled in the cross direction to support the load of the furnace body 91 on the upper surface thereof. A cooling pipe 94A is disposed between the upper section steel bars 93A and the stamp material 96 is filled between these section steel pipes 93A and the cooling pipe 94A. A cooling pipe 94B is disposed below the interval portion of the lower section steel bar 93B and these sections 93B and the cooling pipe 94B are buried in the mortar 97 filled over the entire bottom beam 92 .

The pipes 95 from the cooling water supply source (not shown) are connected to the cooling pipes 94A and 94B, respectively. Cooling water is supplied from the pipes 95 to cool down the bottom beams 92, 93B and the cooling tubes 94A, 94B, the heat from the furnace body 91 is prevented from being conducted to the underlying base.

In the above-described blast furnace, the refractory bricks in the interior are damaged due to the operation, so that a regular number of the refractory bricks is required. The above-mentioned block method is employed also for such disassembly. In order to separate the nose portion from the foundation, a method of removing the nose mantle in which the foundation is cut horizontally by wire sawing or the like has been developed (see Patent Document 3, etc.).

Japanese Patent Application Laid-Open No. 2006-307319 Japanese Unexamined Patent Application Publication No. 6-158132 Japanese Patent Application Laid-Open No. 2006-183105

In the above-described removal method of the nose mantle, the bases are cut horizontally, so complicated operations can not be avoided. That is, it is necessary to divide the horizontal area to be cut into a plurality of sections, to cut by wire sawing in each section, to reduce friction when horizontally pulling out, and to fill the spherical particles to secure load support.

In addition, in the structure of the above-described blast furnace bottom portion, heat of the furnace body is transmitted to the foundation, deterioration of the base concrete is remarkable, and in addition, a cooling pipe is required over substantially the entire surface of the foundation in order to avoid this. Complexity, and the resulting cost increase could not be avoided.

The main object of the present invention is to provide a blast furnace structure which can be easily separated from a base portion at the time of demolition and efficiently suppress thermal conduction to a foundation.

A nosepiece structure of a blast furnace according to the present invention comprises a base, a furnace body formed on the base, a leg portion interposed between the base and the furnace body to support the furnace body, And a heat conduction shielding means for shielding the heat conduction from the furnace body to the base.

In the present invention, the vent portion is supported by the leg portion, so that a gap portion is formed between the base and the venturi. This space can be a flat space extending in the horizontal direction, for example. This space can be used as a substitute for a horizontal cut portion which has been applied to the foundation in the conventional method of removing the furnace body, and the cutting operation in demolishing can be greatly simplified or unnecessary.

Further, in the void portion, the filled air becomes a heat insulating layer, and the heat conduction from the furnace body to the base can be suppressed. In addition, by providing the heat conduction shielding means, the thermal conduction through the leg portion can be suppressed or blocked. Thus, deterioration of the base material can be prevented by heat of the furnace body, and a large-scale water-cooled pipe and the like as in the prior art can be omitted.

As the heat conduction shielding means, a heat insulating layer may be formed on the surface or inside of the leg portion serving as a heat transfer path other than the air gap portion, or a method of forming a heat insulating layer on a base or a portion contacting the leg portion of the furnace body .

As the heat insulating layer, a construction for shielding heat conduction using a heat insulating material can be adopted. As the heat insulating material, an existing material or structure may be suitably used.

As the heat insulating layer, it is possible to adopt a configuration in which heat conduction is shielded by using a cooling device such as a method of cooling the leg portion, a method of cooling the base or a portion in contact with the leg portion of the furnace body. In the cooling, conventional cooling means such as a water-cooling pipe or an air-cooling heat sink can be employed.

In the case where the heat conduction shielding means is installed on the foundation, the expansion and contraction of the blast furnace can be provided at the time of foundation building.

When the heat conduction shielding means is provided on the furnace body, the ring block method may be used when the nosepiece block is manufactured, and this can be applied to expansion and contraction of the blast furnace or to the number of blast furnaces. When the furnace body is constructed on the foundation at the installation site of the blast furnace, the heat conduction shielding means may be applied to the furnace during the process.

When the heat conduction shielding means is provided on the leg portion, a ring block method may be used, or a leg portion provided with heat conduction shielding means may be formed at the time of manufacturing the nosepiece block or connected to the lower surface of the nosepiece block. When the furnace body is constructed on the foundation in the installation site of the blast furnace, a leg having heat conduction shielding means may be provided on the foundation.

In the core structure of the blast furnace of the present invention, it is preferable that the leg portions are formed on the lower surface of the furnace body, and a plurality of the leg portions are arranged at predetermined intervals.

According to the present invention, since the leg portion can be provided in advance on the lower surface of the furnace body, the working efficiency can be improved as compared with the case where the furnace body is installed on the upper surface of the furnace each time.

Further, it is necessary that the leg portion can secure sufficient strength for supporting the load of the furnace body.

In the core structure of the blast furnace of the present invention, it is preferable that the distance between the legs is an interval allowing an air caster to be introduced into the space between the legs.

In the present invention described above, smooth and efficient operation can be performed by using the air caster introduced into the air gap portion when the nosepiece is moved from the dolly or the like used for transportation to the foundation.

In the core structure of the blast furnace of the present invention, it is preferable that the heat conduction shielding means includes a cooling pipe buried in a portion of the base upper surface where the leg portion is mounted.

In the nosepiece structure of the blast furnace of the present invention, it is preferable to include a cooling pipe buried in a portion to which the leg portion of the furnace bottom is connected.

In the present invention, the leg portion can be cooled by the base or the cooling pipe of the furnace, whereby the heat from the furnace body can be reliably cut off. At this time, it is necessary to bury the cooling pipe on the upper surface of the foundation or the bottom surface of the furnace body, but this is not the whole surface as in the prior art, and therefore it is effective for simplification of structure and reduction of cost.

The cooling pipe is not limited to either the base or the nosepiece, but may be formed on both the base and the nosepiece.

In the core structure of the blast furnace of the present invention, it is preferable that the heat conduction shielding means includes a cooling pipe embedded in the leg portion.

According to the present invention, the leg portion can be cooled by the cooling pipe provided in the leg portion itself, whereby the heat from the furnace body can be reliably cut off.

At this time, as a method of providing a cooling pipe to the leg portion, a cooling pipe can be attached to the side of the leg portion, and the following structure is available.

In the core structure of the blast furnace of the present invention, it is preferable that the leg portion is a steel block, and the cooling pipe is a through hole formed in the block.

According to the present invention, it is possible to easily assure the rigidity of the leg portion by forming the block as a forced block, and by forming the through hole in the block, the cooling pipe can be easily formed. Since the forced block is high in thermal conductivity, it is in itself unsuitable for the shielding of the thermal conduction, but the entire cooling block can be efficiently performed by integrally forming the cooling pipe.

In the core structure of the blast furnace of the present invention, the leg portion is a block formed by injecting mortar into a mold, and the cooling pipe is preferably formed by a pipe installed in the mold before injection of the mortar.

In the present invention, it is possible to integrally mold up to the cooling pipe by mortar molding, which is easy to manufacture. In addition, since most of them are mortar, the material cost can be reduced.

The heat conduction shielding means by the cooling pipes of these leg portions may be coexistent with the above-mentioned base or non-body heat conduction shielding means.

In the nosepiece structure of the blast furnace of the present invention, it is preferable that the furnace body has a bottom beam extending in the horizontal direction at its bottom portion, and the furnace body is constructed on the foundation by mounting the bottom beam on the base.

In the present invention, by using the bottom beam, the nose mantle can be manufactured at the work site and transported to the foundation of the installation site.

In the core structure of the blast furnace of the present invention, it is preferable that the bottom beam has a lattice frame and upper and lower surface panels attached to the front and back of the frame, and the legs are connected directly under the frame.

In the present invention, since the leg portion is disposed at the portion corresponding to the frame of the bottom beam, the support of the body frame load can be surely performed.

The leg portion may be manufactured separately from the bottom beam and connected to the bottom surface of the bottom beam, but may be manufactured together with the frame at the time of manufacturing the bottom beam. Alternatively, the bottom beam may be integrated with the bottom beam. For example, the bottom edge of the bottom beam frame may extend below the bottom panel, and a space may be formed between the frames protruding downward.

In the noser structure of the blast furnace of the present invention, the bottom beam preferably has a mortar filled between the upper panel and the lower panel.

In the present invention, the rigidity of the frame can be increased by the mortar filling the inner space of the bottom beam.

In the nosepiece structure of the present invention, the bottom beam may have a hollow portion extending horizontally between the upper panel and the lower panel, and the heat conduction shielding means may include an air layer of the hollow portion.

In the present invention, an air layer extending horizontally is secured by a hollow portion formed in the bottom beam, and this air layer serves as a heat insulating layer, so that it can be used as a heat conduction shielding means.

In the core structure of the blast furnace of the present invention, it is preferable that the leg portion is a hollow member, and the heat conduction shielding means includes an air layer in the space inside the leg portion.

According to the present invention, an air layer is secured inside the leg portion, and this air layer acts as a heat insulating layer, so that it can be used as a heat conduction shielding means.

The air layer of the bottom beam or the air layer of the leg portion as the heat conduction shielding means has a lower shielding property of heat conduction than the heat conduction shielding means by the positive cooling by the cooling tube described above but requires no peripheral device or power for circulating the refrigerant or the like Equipment cost and operation cost can be suppressed.

Therefore, by using the heat conduction shielding means by such an air layer in combination with the heat conduction shielding means by the above-mentioned cooling tube, a cooling pipe is provided in the portion where the heat flow rate is large, and an air layer is arranged in the non- .

In the nosepiece structure of the present invention, it is preferable that the heat conduction shielding means includes an air layer of the air gap portion and a blower for circulating the cooling air to the gap portion.

In the present invention, the air gap portion does not remain as a heat insulating layer, but actively functions as a coolant passage, thereby enhancing the shielding function of heat conduction.

The circulation of the cooling air in the gap portion and the cooling by the above-mentioned cooling pipe can be used in combination.

In the core structure of the blast furnace of the present invention, it is preferable that the area ratio (porosity) of the space portion with respect to the bottom surface area of the bottom surface of the furnace body is within the range of 60% to 90% of the horizontal projected area at the formation portion of the air gap portion.

According to the present invention, it is possible to sufficiently exhibit the heat insulating function of the air gap portion, and also to fulfill the above-mentioned substitute function of the cutting construction at the time of demolition.

If the porosity is less than 60%, the heat insulating function by the air gap portion can not be sufficiently obtained. On the other hand, if the porosity exceeds 90%, the support strength of the furnace portion may not be sufficient, which is not preferable. Therefore, it is preferable that the porosity is between 60% and 90%.

1 is a schematic diagram showing a blast furnace according to a first embodiment of the present invention.
Fig. 2 is a schematic view showing the production of the nose mantle of the first embodiment. Fig.
Fig. 3 is a schematic view showing the conveyance of the nose mantle according to the first embodiment. Fig.
Fig. 4 is a schematic diagram showing the conveyance of the nose mantle according to the first embodiment. Fig.
Fig. 5 is a partially broken plan view showing the bottom beam of the first embodiment. Fig.
6 is a cross-sectional view showing a main part of the first embodiment.
7 is a cross-sectional view showing a main portion of a second embodiment of the present invention.
Fig. 8 is a cross-sectional view showing a main portion of a third embodiment of the present invention.
9 is a cross-sectional view showing a leg member of the third embodiment.
10 is a perspective view showing the arrangement of the leg members of the third embodiment.
11 is a cross-sectional view showing the main part of the fourth embodiment of the present invention.
12 is a cross-sectional view showing a main portion of a fifth embodiment of the present invention.
13 is a cross-sectional view showing a main part of a sixth embodiment of the present invention.
14 is a cross-sectional view showing a main part of a seventh embodiment of the present invention.
15 is a cross-sectional view showing the essential part of the eighth embodiment of the present invention.
Fig. 16 is a cross-sectional view showing the essential part of the ninth embodiment of the present invention. Fig.
17 is a cross-sectional view showing a main part of a tenth embodiment of the present invention.
Fig. 18 is a cross-sectional view showing a main part of an eleventh embodiment of the present invention. Fig.
19 is a cross-sectional view showing a conventional open bottom structure.
20 is a cross-sectional view showing a conventional open bottom structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]

1, the number of dismantled blast furnaces 1 is determined by dividing the furnace body 3 built in a supporting column 2 in the horizontal direction into a plurality of stages of ring blocks 4 in the vertical direction, Out of the base (5) sequentially. On the other hand, the newly installed furnace body 3 is constructed by manufacturing the ring blocks 4 at a plurality of work sites other than the installation site of the blast furnace, and stacking them on the foundation 5.

The nose mantle 10 of the ring block 4 described above is constructed by forming the nose structure 12 which becomes the nose portion of the furnace body 3 on the bottom beam 11. [

2, in the production of the noge mantle 10, a balance beam 13 is installed upright on an index of a work site, and a bottom beam 11 is provided on the upper face of the balance beam 13 . The balance beam 13 and the bottom beam 11 are each a built-up structure having a lattice shape or the like.

An air caster 19 (see FIG. 4) for horizontally moving the bottom beam 11 can be introduced between the bottom beam 11 and the balance beam 13. 5 shows an example of the arrangement of the air caster 19 with respect to the plane shape of the bottom beam 11. However, the method of arranging the air caster 19 is not limited to this.

The nosepiece structure 12 is constructed on the upper surface of the bottom beam 11 thus constructed.

In detail, a metal foil 15, which is the outer periphery of the bottom plate 14, is installed upright on the top surface of the bottom beam 11, and a stave cooler 16 and a refractory material 17 such as noble brick or carbon brick is stacked on the upper surface of the bottom plate 14 through a joint filler. In this state, the weight of the nose mantle 10 is about 1000 tons or more. In order to construct the nose mantle 10 on the balance beam 13 installed at the work site, the balance beam 13 has sufficient rigidity Thereby preventing deformation of the nose mantle 10.

When the noser mantle 10 can be manufactured at the work site, the dolly 18, which is a large-scale heavy-goods conveyance truck, is used to carry it to the side of the base 5 of the installation site, as shown in Fig. That is, a plurality of dolly columns are formed by connecting the dolly 18 in the conveying direction (longitudinal direction), and a plurality of dolly rows formed are drawn in parallel into the gap formed between the balance beam 13 and the ground surface, The balance beam 13 is moved up to the side of the base 5. [

As shown in Figs. 4 and 5, the air caster 19 introduced into the bottom beam 11 is used for the transfer to the base 5. That is, after the balance beam 13 equipped with the noge mantle 10 is laterally attached to the base 5 by the dolly 18, the air caster 19 is started to move the bottom beam 11 toward the balance beam 13 And in this state, the horizontal force is applied to the nose mantle 10 by a winch or the like to be transported on the foundation 5. [

Fig. 5 shows a planar shape of the bottom beam 11 of the present embodiment, and Fig. 6 is an enlarged view of the lower structure of the nogger mantle 10 of the present embodiment.

5, the bottom beam 11 of the present embodiment has a rectangular main body portion 11A and an extended portion 11B protruding on both sides thereof.

The bottom beam 11 has a frame on the lattice as a basic structure. This frame is formed by arranging a plurality of long H-shaped steel plates 111 in parallel and connecting them with a main beam 110 made of the same steel material. In this case, in the main body portion 11A, the two H-shaped steel materials 111 are arranged in a pair to constitute the main beam 111A. In the expanded portion 11B (on both sides in Fig. 5) 111 constitute the main beam 111B alone. This is because the load per unit area of the nose mantle 10 constructed on the bottom beam 11 is set larger in the main body portion 11A than in the expanded portion 11B because the peripheral edge is small.

6, in the main body portion 11A, a leg member 113 is provided on the lower surface of the main beam 111A, and a bottom plate 112 is provided between the main beams 111A. In the extended portion 11B, a leg member 113 is provided on the lower surface of the main beam 111B and a bottom plate 112 is provided between the main beam 111B and the adjacent main beam 111A. The lower surface of the bottom beam 11 is covered by the leg members 113 and the bottom plate 112 in its entirety.

Mortar 114 is filled between main beams 111A and 111B. The mortar 114 is filled up to a level lower than a predetermined height from the upper flange of the main beams 111A and 111B and the cooling pipe 116 and the auxiliary beam 115 are arranged on the upper surface of the mortar 114. [

The height of the upper surface of the auxiliary beam 115 becomes the same level as that of the main beams 111A and 111B. A stamp material 117 is filled in between the auxiliary beams 115 and the cooling pipe 116 is buried by the stamp material 117. [ The upper surface of the stamp material 117 is also at the same level as the main beams 111A and 111B.

The upper surface of the bottom beam 11 is horizontally formed by the upper surfaces of the main beams 111A and 111B, the auxiliary beam 115 and the stamp material 117. [

The nosepiece structure 12 described above is constructed by unfolding the bottom plate 14 on the top surface of the bottom beam 11 and connecting the bottoms 14 sequentially.

In the above-described bottom beam 11, the entire load including the nosepiece structure 12 is supported by the leg members 113. [ The leg members 113 are supported by the balance beam 13 placed on the work site in the manufacturing phase and are supported on the foundation 5 after being conveyed to the installation site.

Therefore, the leg member 113 is made of a material having a sufficiently high load-bearing capacity. Specifically, a forced plate or block is used.

A receiving member 51 is provided at a portion where the leg member 113 is provided on the base 5. That is, the foundation 5 is made of, for example, a reinforced concrete structure, but the housing member 51 is buried in the foundation 5 or the like. But it may be buried after concrete curing of foundation (5). The load can be dispersed by the housing member 51 even if the load of the nose mantle 10 is concentrated on the portion of the leg member 113 by the housing member 51 and the concrete of the base 5 is not broken . In addition, it is preferable that a portion of the concrete of the foundation 5 adjacent to the housing member 51, particularly a portion immediately below the concrete member 5, is reinforced by adding a reinforcement.

In the present embodiment, the leg member 113 is the leg portion of the present invention. Between the upper surface of the base 5 and the bottom plate 112 of the bottom beam 11, A portion 50 is formed.

In the present embodiment, the porosity (the area ratio of the area of the void portion occupying the entire bottom surface area) of the gap portion 50 in the bottom shape of the bottom beam 11 is between 60% and 90%.

The air gap portion 50 is provided with an air caster 19 for introducing the nose mantle 10 into the base 5 and causing the upper surface of the air caster 19 to rise to float the nose mantle 10 Is done.

Therefore, the height of the leg member 113 is set in accordance with the thickness of the air caster 19 described above. That is, the thickness of the air gap portion 50, that is, the height of the leg member 113 is set to be larger than the height of the air caster 19 at the time of introduction and smaller than the height of the air caster 19 in the active state.

The gap of the leg members 113, that is, the width of the air gap portion 50, is larger than the width of the air caster 19 to be introduced. Assuming a normal air caster 19, the distance between the leg members 113 is preferably 1600 to 3000 mm. If this is smaller than 1600 mm, it is difficult to insert and remove the air caster 19 due to interference. On the other hand, if it is larger than 3000 mm, the bending stress applied to the bottom beam 11 between the leg members 113 becomes large, which may have an undesirable influence on the refractory material due to warping.

On the upper surface of the base 5, an air-caster rail 52 having a smooth surface is provided between the receiving members 51, so that the air-caster 19 can smoothly be slid during operation.

After being transported to the base 5, the air caster 19 is drawn out of the air gap portion 50. In this state, the air gap portion 50 is kept in the space. Here, the air gap portion 50 is a series of spaces formed between the leg members 113 and penetrates in the vertical direction of FIG. Therefore, adequate ventilation is obtained in the air gap portion 50, and the cooling effect of the bottom surface of the bottom beam 11 and the top surface of the base 5 can be obtained by this ventilation.

In order to enhance the cooling effect, a fan 50A for blowing air to the gap portion 50 along the periphery of the base 5 is provided. The fan 50A may be configured to perform exhausting from the air gap portion 50. [ A fan for blowing air to one end portion of the air gap portion 50 may be provided and a fan for exhausting the other end portion may be provided.

It is preferable that the flow rate of the air formed in the air gap portion 50 by the fan 50A is 10 to 30 m / sec. If the flow velocity is less than 10 m / sec, cooling of the surrounding refractory material, mortar, etc. may be insufficient and the service life may be shortened. If the flow rate is higher than 30 m / sec, the operation cost of the fan 50A is increased, and the heat absorption due to the ventilation becomes insufficient and the cooling efficiency is lowered.

In the present embodiment, the bottom beam 11 is provided with a cooling pipe 118 as a heat conduction shielding means.

The cooling pipe 118 receives circulation of cooling water from the same cooling water supply source (not shown) as that of the cooling pipe 116 described above to perform ambient cooling. Here, the cooling tube 116 is embedded in the upper part of the bottom beam 11 to cool the entire upper surface of the bottom beam 11. [ The cooling tube 118 is embedded in the lower part of the bottom beam 11 so as to surround the attachment part of the leg member 113 and the heat conduction from the leg member 113 to the base 5 is achieved by cooling the leg member 113. [ As shown in FIG.

As the cooling pipes 118 and 116, a piping material having a nominal diameter (25A to 50A) can be used.

The flow rate of the cooling water passing through the cooling pipes 118 and 116 is preferably 1 to 5 m / sec. If the flow velocity is less than 1 m / sec, cooling of the surrounding refractory material, mortar, etc. may be insufficient and the service life may be shortened. If the flow velocity is higher than 5 m / sec, the operation cost for circulating the cooling water is increased, and the heat absorption due to the cooling water is insufficient and the cooling efficiency is lowered.

According to this embodiment, the following effects can be obtained.

That is, since the bottom beam 11 is supported only by the leg member 113 with respect to the base 5 and the air gap portion 50 is left as an air layer, the air gap portion 50 also serves as the heat conduction shielding means, The heat becomes difficult to conduct through the air gap portion 50. [ On the other hand, by cooling the leg member 113 by the cooling pipe 118, the heat of the furnace body is prevented from being transmitted to the base 5 through the leg member 113. As a result, the thermal conduction to the foundation 5 is shielded, deterioration of the concrete of the foundation 5 can be prevented, and the cooling structure and the like that have heretofore been required can be simplified.

The noche mantle 10 is mounted on the base 5 by the leg members 113 and the noche mantle 10 and the base 5 are mounted in advance in the space 50 And is operated as a blast furnace in a partitioned state. Therefore, when removing the nose mantle 10 in dismantling the blast furnace, the nose mantle 10 can be separated from the foundation 5 by using the air gap portion 50, Can be omitted.

Further, the present invention is not limited to the above-described embodiments, but other embodiments, modifications, and the like as described below are also included in the present invention.

In the first embodiment, the cooling pipe 118 is provided below the bottom beam 11 as the heat conduction shielding means along the leg member 113, but a cooling pipe may be provided on the base 5. [

[Second embodiment]

In Fig. 7, this embodiment basically has the same configuration as that of the first embodiment. In the present embodiment, however, the bottom tube 11 is not provided with the cooling pipe 118. Instead, the cooling tube 53 as the heat conduction shielding means is buried along the housing member 51 of the base 5 .

In this embodiment, the housing member 51 is cooled by the cooling pipe 53, and the leg member 113 is cooled through the housing member 51 as well. Therefore, the heat conduction from the leg member 113 is shielded by the cooling pipe 53 as the heat conduction shielding means.

Both the cooling pipe 53 on the base 5 side and the cooling pipe 118 on the bottom beam 11 side may be used as the heat conduction shielding means.

[Third embodiment]

Further, a cooling pipe may be embedded in the leg member 113 itself to cool the pipe itself.

In Fig. 8, this embodiment basically has the same configuration as that of the first embodiment. However, in the present embodiment, the bottom tube 11 is not provided with the cooling pipe 118, and instead, the cooling pipe 119 as the heat conduction shielding means is embedded in the leg member 113 itself.

In this embodiment, the leg member 113 is cooled by the cooling pipe 119 from the inside. Therefore, the heat conduction from the leg member 113 is shielded by the cooling pipe 119 as the heat conduction shielding means.

The cooling pipe 119 of the leg member 113 is connected to either or both of the cooling pipe 53 on the base 5 side and the cooling pipe 118 on the side of the bottom beam 11, It may be employed as a shielding means.

The leg member 113 having the cooling pipe 119 therein can be manufactured as follows.

9, a block-shaped steel material having a flat and long shape is used as a base material of the leg member 113, and a through hole extending in the longitudinal direction is formed in this steel material, ).

As the base material of the leg member 113, a concrete molded product having a flat and long shape block shape can be used. Specifically, a mold having an inner shape of a desired block shape may be prepared, and concrete may be injected and solidified. In the case of forming the cooling pipe 119 in such a leg member 113, the pipe may be previously installed in the mold before molding, and the concrete may be filled around the pipe.

The leg member 113 is fixed to the lower surface of the bottom beam 11.

As shown in Fig. 10, the leg members 113 are continuously connected in the longitudinal direction thereof. At this time, the air gap portion 50 through which the air caster 19 can enter is formed between the leg members 113 as described in the first embodiment.

A series of cooling tubes traversing the bottom beam 11 can be formed by successively communicating the cooling tubes 119 incorporated in each of the leg members 113 with each other.

In each of the above-described embodiments, in the air gap portion, the air layer serves as the heat conduction shielding means, and at the same time, the heat conduction shielding means for shielding the heat conduction through the leg portion is used as either the base, the leg portion, And the leg portion or the vicinity thereof was cooled by using a cooling pipe or a combination of these cooling pipes provided in one.

In the present invention, the heat conduction shielding means for shielding the heat conduction through the leg portion is not limited to the active cooling as in the above-described embodiments, and even if the heat conduction is shielded by forming the heat insulating layer good.

[Fourth Embodiment]

In Fig. 11, this embodiment basically has the same configuration as that of the first embodiment. However, in the present embodiment, the above-described cooling pipe 118 (see Fig. 6) is not provided under the bottom beam 11. [ In addition, filling of the mortar 114 is omitted, and the area from the middle to the bottom surface of the bottom beam 11 is a hollow portion 114A.

In this embodiment, the heat from the nosepiece structure 12 is cooled by some cooling tube 116 and then tends to be conducted downward through the layers of the auxiliary beam 115 and the stamp material 117. Here, a part of the heat conduction reaches the leg portion 113 through the main beams 111A and 111B, but since the hollow portion 114A is an air layer, the heat conduction through the hollow portion 114A is shielded.

As described above, in the present embodiment, the heat conduction from the leg member 113 can be shielded by the hollow portion 114A as the heat conduction shielding means, while not actively cooling.

In the present embodiment, since the cooling is not actively performed by the refrigerant passing through the cooling pipe, the apparatus configuration can be simplified, and facility cost and operation cost can be reduced.

The heat conduction shielding means by the hollow portion 114A may be used in combination with the other heat conduction shielding means described above. For example, in Fig. 11, the leg portion 113 may be provided with the above-described cooling pipe 119 (see Fig. 8) to cool the leg portion. In this case, although the circulating device for the refrigerant is required, since the hollow portion 114A as the heat conduction shielding means is provided, the cooling performance in the circulating device of the refrigerant can be reduced, and the equipment cost and the operation cost can be reduced accordingly.

[Fifth Embodiment]

In Fig. 12, this embodiment basically has the same configuration as that of the first embodiment. However, in the present embodiment, the above-described cooling pipe 118 (see Fig. 6) is not provided under the bottom beam 11. [ The filling of the mortar 114 is also up to the upper half portion, and the lower half portion of the bottom beam 11 is the hollow portion 114A.

Specifically, the intermediate plate 112A is provided at a middle height position in the web portion of the main beams 111A and 111B, and the mortar 114 is filled on the intermediate plate 112A. In addition, a hollow portion 114A ).

In the present embodiment, the hollow portion 113A is also formed in the leg portion.

Specifically, the bottom ends of the main beams 111A and 111B of the bottom beam 11 extend to directly contact the receiving member 51. [ A bottom plate 112 is provided at a predetermined height from the lower ends of the main beams 111A and 111B in the web portions of the main beams 111A and 111B. Therefore, the lower ends of the main beams 111A and 111B protrude downward from the bottom plate 112, and leg portions are formed by the protruding portions, and air gap portions 50 are formed around the leg portions.

In this embodiment the heat from the noseride structure 12 is cooled by some cooling tube 116 and then passes through the layers of the auxiliary beam 115 and the stamp material 117 and also through the layer of mortar 114 It tries to be turned downward. However, since the hollow portion 114A is an air layer, the heat conduction through the hollow portion 114A is shielded. A part of the heat conduction reaches the leg portion through the main beams 111A and 111B, but also the heat conduction through the leg portion is suppressed because the hollow portion 113A is also formed in the leg portion.

In this embodiment as well, although the cooling is not positively performed, the heat conduction through the leg portion can be shielded by the hollow portions 114A and 113A as the heat conduction shielding means. Further, since the cooling is not actively performed by the refrigerant passing through the cooling pipe, the device configuration can be simplified, and the facility cost and the operation cost can be reduced.

The heat conduction shielding means by the hollow portions 114A and 113A may be used in combination with other heat conduction shielding means described above. For example, in FIG. 6 or 7, instead of the leg member 113, the main beams 111A and 111B may be extended to form leg portions having hollow portions 113A. In this case, although a refrigerant circulation device for the cooling pipes 118 and 53 is necessary, since there is the hollow portion 113A as the heat conduction shielding means in the leg portion, the cooling performance in the circulation device of the refrigerant can be reduced The equipment cost and the operation cost can be reduced by that much.

In each of the first to fifth embodiments described above, the nose mantle 10 is previously assembled outside the installation site of the blast furnace 1, and the nose mantle 10 is transported and mounted on the foundation 5 . For this purpose, the bottom beam 11 for securing the bottom strength necessary for the transporting is used, and the nogger mantle 10 is assembled thereon.

On the other hand, a method of assembling the noge mantle 10 on the foundation 5 as the installation site of the blast furnace 1 may be adopted. In this manner, the bottom beam 11 is not used, but the present invention can be implemented in such a manner that a leg portion, a void portion, and a heat conduction shielding means are constituted in accordance with the present invention.

[Sixth Embodiment]

In Fig. 13, the foundation 5 is constructed of concrete or the like at the installation site of the blast furnace 1. On the base 5, a leg member 113 is intermittently arranged, and a shaped steel member 111 is assembled thereon. The bottom plate 14 is provided on the upper surface of the shaped steel member 111 and the layer of the mortar 114B is formed on the lower surface side of the interval portion of the shaped steel member 111. The cooling pipe 116 is disposed on the upper surface of the mortar 114B and the mortar 114 is filled between the upper surface of the mortar 114B and the bottom plate 14 to fill the cooling pipe 116. [

The nodular structure is formed by the shaped steel material 111, the mortar 114B, the mortar 114, and the bottom plate 14. This nosepiece structure is surrounded by the noser mantle 10. The nose mantle 10 is fixed to the foundation 5. [

As a layer of the mortar 114B, a mortar molded in advance into a slab shape may be supported at the lower end of the shaped material 111, or the mold may be temporarily fixed to the lower surface of the shaped material 111 Mortar may be charged.

In the present embodiment, a gap portion 50 is formed between the upper and lower surfaces of the base 5 and the lower surface (the lower surface of the mortar 114B) at predetermined intervals between the leg members 113. The air gap portion 50 functions as a heat conduction shielding means for shielding the heat in the furnace by the air layer. The cooling pipe 116 buried in the noser structure also functions as a heat conduction shielding means for shielding heat transmitted from the furnace to the foundation 5 by cooling the surrounding mortars 114 and 114B. In the present embodiment, the cooling pipe 116 is provided at a lower position and is effective for cooling the leg member 113 as compared with the above-described first to fifth embodiments.

In this embodiment as well, the heat conduction shielding is performed by the air gap portion 50 which also serves as the heat conduction shielding means except for the leg portion, and the heat conduction shielding through the leg portion by the cooling tube 116 serving as the heat conduction shielding means Is done.

In this way, even in the structure in which the bottom beam 11 is not used, the effect according to the present invention can be obtained.

[Seventh Embodiment]

The construction of the sixth embodiment may be such that the cooling pipe 53 is embedded in the base 5 to cool the leg member 113. [

In Fig. 14, this embodiment basically has the same configuration as that of the sixth embodiment. However, in the present embodiment, the cooling pipe 53 is embedded in the vicinity of the upper surface of the base 5, so that the leg member 113 is cooled. As the cooling pipe 53 embedded in the base 5, the structure described in the second embodiment can be used.

In this embodiment, the leg member 113 is cooled by the cooling pipe 53. Therefore, the heat conduction from the leg member 113 is more effectively shielded by the cooling pipe 53 as the heat conduction shielding means.

[Eighth embodiment]

The structure of the sixth embodiment may be such that the cooling pipe 119 is buried in the leg member 113 itself to cool the same.

In Fig. 15, this embodiment basically has the same configuration as that of the sixth embodiment. However, in this embodiment, the cooling pipe 119 as the heat conduction shielding means is embedded in the leg member 113 itself. As the leg member 113 having the cooling pipe 119, the one described in the third embodiment can be used.

In this embodiment, the leg member 113 is cooled by the cooling pipe 119 from the inside. Therefore, the heat conduction from the leg member 113 is more effectively shielded by the cooling pipe 119 as the heat conduction shielding means.

[Ninth embodiment]

The structure of the sixth embodiment may be such that the bottom plate 14 like the upper surface is provided on the lower surface of the steel material 111 to hold the layer of the mortar 114B.

16, this embodiment basically has the same configuration as that of the sixth embodiment. However, in the present embodiment, a bottom plate 14 such as a bottom plate 14 provided on the upper surface of the shaped steel 111 is provided on the bottom surface of the shaped steel 111. [ The mortar 114B is filled on the lower side plate 14 and then the cooling pipe 116 is disposed in the same manner as in the sixth embodiment and the mortar 114 is filled with the mortar 114B.

In this embodiment, the mortar 114B can be held by the bottom plate 14 on the lower side, whereby the layer of the mortar 114B can be filled in the field, .

[Tenth Embodiment]

The construction of the ninth embodiment may be such that the cooling pipe 53 is embedded in the base 5 to cool the leg member 113. [

17, the present embodiment basically has the same configuration as that of the ninth embodiment described above. However, in the present embodiment, the cooling pipe 53 is embedded in the vicinity of the upper surface of the base 5, so that the leg member 113 is cooled. As the cooling pipe 53 embedded in the base 5, the structure described in the second embodiment can be used.

In this embodiment, the leg member 113 is cooled by the cooling pipe 53. Therefore, the heat conduction from the leg member 113 is more effectively shielded by the cooling pipe 53 as the heat conduction shielding means.

[Eleventh Embodiment]

The cooling tube 119 may be embedded in the leg member 113 itself to cool the body of the ninth embodiment.

18, this embodiment basically has the same configuration as that of the ninth embodiment described above. However, in this embodiment, the cooling pipe 119 as the heat conduction shielding means is embedded in the leg member 113 itself. As the leg member 113 having the cooling pipe 119, the one described in the third embodiment can be used.

In this embodiment, the leg member 113 is cooled by the cooling pipe 119 from the inside. Therefore, the heat conduction from the leg member 113 is more effectively shielded by the cooling pipe 119 as the heat conduction shielding means.

[Other Embodiments]

In each of the above-described embodiments, the cooling pipe 118, the cooling pipe 119, or the cooling pipe 53 for cooling the leg member 113 is used as the heat conduction shielding means, but other cooling means may be employed.

For example, a so-called heat sink having a plurality of fins formed of a material having high thermal conductivity may be mounted on the surface of the leg member 113, in addition to cooling by a cooling pipe circulating the cooling water. By this heat sink, the leg member 113 can be cooled by the cooling air passing through the gap portion 50, and the heat conduction from the leg member 113 can be shielded.

Alternatively, it is also possible to employ another configuration that can shield the heat conduction via the leg member 113, or the leg member 113 may be a block formed of a material having high heat insulating property, and may have a heat conduction shielding effect Maybe. However, since the leg member 113 is required to have a high load-bearing capacity as described above, it is preferable to employ the same structure as that of each of the above-described embodiments.

It is preferable that the furnace body 3 and the supporting column 2 are provided in the blast furnace 1 but the furnace body 3 and the supporting column 2 are not joined at the time of operation. It is possible to avoid the influence of the unnecessary relative displacement between the furnace body 3 and the supporting column 2 by the thermal behavior during the blast furnace operation by not joining the furnace body 3 and the supporting column 2 at the time of operation.

Further, when an earthquake occurs between the furnace body and the base, there is a possibility that relative displacement due to mutual sliding occurs. However, according to the detailed examination of the present inventors, in the case of the blast furnace body to which the present invention is applied, even when an earthquake occurs, the slipping force between the foundation and the leg portion is " Static Friction Coefficient "Quot; coefficient ", so that the blast furnace main body is stably self-supported, so that the problem of slip is avoided. According to the experimental results of the present inventors, the static friction coefficient is 0.64 to 0.73 and the shear force coefficient at the time of earthquake is 0.2 (in the case of Kanto).

[Industrial Availability]

INDUSTRIAL APPLICABILITY The present invention can be used as a furnace bottom structure of a blast furnace, and can be used in a furnace for building a furnace body on a foundation.

One … Blast furnace 2 ... Support column
3 ... Noche 4 ... Ring block
5 ... Base 10 ... Nothermal mantle
11 ... Bottom beam 11B ... Extended portion
11A ... Body part 12 ... Noser structure
13 ... Balance beam 14 ... No plate
15 ... 16 ... Stove Cooler
17 ... Refractory 18 ... Dolly
19 ... AirCaster 50A ... Pan
50 ... The air gap portion 51 ... The housing member
52 ... Air caster rail 53 ... Cooling tube (heat conduction shielding means)
110 ... Main beam 111 ... Shaped steel
111A, 111B ... Main beam 112 ... Bottom plate
113 ... The leg members (leg portions) 113A ... The hollow portion (heat conduction shielding means)
114, 114B ... Mortar 114A ... The hollow portion (heat conduction shielding means)
115 ... The auxiliary beam 116 ... Cooling pipe
117 ... Stamp materials 118, 119 ... Cooling tube (heat conduction shielding means)

Claims (15)

A base member provided on the foundation; a leg portion interposed between the base member and the furnace body to support the furnace body; and a gap portion extending in the horizontal direction formed between the base and the furnace body by the leg portion, And heat conduction shielding means for shielding heat conduction from the furnace body to the base,
The leg portions are formed on the lower surface of the furnace body, and a plurality of the leg portions are arranged at predetermined intervals,
Wherein an interval between the leg portions is an interval capable of introducing an air caster into a gap portion between the leg portions. delete delete The method according to claim 1,
Wherein the heat conduction shielding means includes a cooling pipe embedded in a portion of the base upper surface where the leg portion is mounted. The method according to claim 1,
Wherein the heat conduction shielding means includes a cooling tube embedded in a portion supported by the leg portion of the bottom surface of the furnace body. The method according to claim 1,
Wherein the heat conduction shielding means includes a cooling pipe embedded in the leg portion. A base member provided on the foundation; a leg portion interposed between the base member and the furnace body to support the furnace body; and a gap portion extending in the horizontal direction formed between the base and the furnace body by the leg portion, And heat conduction shielding means for shielding heat conduction from the furnace body to the base,
Wherein the heat conduction shielding means includes a cooling pipe embedded in the leg portion,
The leg is a forced block,
Wherein the cooling pipe is a through hole formed in the block. A base member provided on the foundation; a leg portion interposed between the base member and the furnace body to support the furnace body; and a gap portion extending in the horizontal direction formed between the base and the furnace body by the leg portion, And heat conduction shielding means for shielding heat conduction from the furnace body to the base,
Wherein the heat conduction shielding means includes a cooling pipe embedded in the leg portion,
The leg portion is a block formed by injecting mortar into a mold,
Wherein the cooling pipe is formed by a pipe installed in the mold before the injection of the mortar. The method according to claim 1,
Wherein the furnace body has a bottom beam extending horizontally at a bottom thereof;
Wherein the furnace body is constructed on the foundation by mounting the bottom beam on the foundation. 10. The method of claim 9,
Wherein the bottom beam has a frame on a lattice and upper and lower surface panels attached to the front and back of the frame;
And the leg portion is connected to a lower portion of the frame. A base member provided on the foundation; a leg portion interposed between the base member and the furnace body to support the furnace body; and a gap portion extending in the horizontal direction formed between the base and the furnace body by the leg portion, And heat conduction shielding means for shielding heat conduction from the furnace body to the base,
Wherein the furnace body has a bottom beam extending in a horizontal direction at a bottom thereof,
By mounting the bottom beam on the foundation, the furnace body is built on the foundation,
Wherein the bottom beam has a lattice frame and upper and lower surface panels attached to the front and back of the frame,
Wherein the leg is connected directly under the frame,
Wherein the bottom beam has a mortar filled between the top panel and the bottom panel. A base member provided on the foundation; a leg portion interposed between the base member and the furnace body to support the furnace body; and a gap portion extending in the horizontal direction formed between the base and the furnace body by the leg portion, And heat conduction shielding means for shielding heat conduction from the furnace body to the base,
Wherein the furnace body has a bottom beam extending in a horizontal direction at a bottom thereof,
By mounting the bottom beam on the foundation, the furnace body is built on the foundation,
Wherein the bottom beam has a lattice frame and upper and lower surface panels attached to the front and back of the frame,
Wherein the leg is connected directly under the frame,
Wherein the bottom beam has a hollow portion extending horizontally between the top panel and the bottom panel,
Wherein the heat conduction shielding means includes an air layer of the hollow portion. A base member provided on the foundation; a leg portion interposed between the base member and the furnace body to support the furnace body; and a gap portion extending in the horizontal direction formed between the base and the furnace body by the leg portion, And heat conduction shielding means for shielding heat conduction from the furnace body to the base,
The leg is a hollow member,
Wherein the heat conduction shielding means includes an air layer in the leg internal space. A base member provided on the foundation; a leg portion interposed between the base member and the furnace body to support the furnace body; and a gap portion extending in the horizontal direction formed between the base and the furnace body by the leg portion, And heat conduction shielding means for shielding heat conduction from the furnace body to the base,
Wherein the heat conduction shielding means includes an air layer of the air gap portion and a blower for passing cooling air to the gap portion. A base member provided on the foundation; a leg portion interposed between the base member and the furnace body to support the furnace body; and a gap portion extending in the horizontal direction formed between the base and the furnace body by the leg portion, And heat conduction shielding means for shielding heat conduction from the furnace body to the base,
Wherein the void portion has an area ratio (porosity) of a horizontal projected area at a formation site of the void portion to a bottom face area of the bottom face of the furnace body within a range of 60% to 90%.

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