RU2618978C1 - Method for reconstruction of blast furnace - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to ferrous metallurgy, namely to reconstruction of blast furnaces. The method of reconstruction of a blast furnace, which has a housing and a system of columns, mounted on the operational foundation includes the following stages: the stage of construction of a new furnace, during which a new foundation is erected and the column system and a new furnace housing onsite, other than the operating foundation; the stage of segmenting of the operating foundation during which it is cut horizontally for separation into the top of the foundation, on which the housing and the system of columns of the old furnace are mounted, and the bottom of the foundation, also the stage of construction of a new furnace and the step of segmenting of the operating foundation is performed at the time when the old blast furnace is operated; blowing of the old blast furnace; the stage of shifting aside of the old furnace during which the foundation top is shifted aside together with the foundation housing and the system of columns of the old furnace; and the stage of thrusting a new furnace, during which a new foundation is thrust to the bottom of the operating foundation completely together with the column and the housing of the new furnace.

EFFECT: shortening the time of reconstruction of a blast furnace is provided.

8 cl, 40 dwg

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a method for reconstructing a blast furnace, and more particularly, to a method for reconstructing a blast furnace suitable for removing an old furnace body and a column system of an old furnace, and constructing a new furnace body and a column system of a new furnace in a short period of time.

BACKGROUND

[0002] In a blast furnace for the production of cast iron, there is a need for repair, that is, reconstruction of the furnace body every ten years or so.

Reconstruction of the furnace body is carried out by removing the body of the old furnace, built on the foundation at the installation site of the blast furnace, and constructing the body of the new furnace on the foundation.

During the reconstruction of the furnace body, when the old furnace body is dismantled on the foundation, and then the new furnace body is built, the shutdown period of the blast furnace becomes long, resulting in large economic losses every day.

[0003] To solve such problems, the so-called ring block construction method for reconstructing a blast furnace was introduced, in which the furnace body is cut into cross-sections into rings and removed from the foundation in the form of a ring block, and the ring block is assembled in another place with transfer to foundation.

Among them, a large-block construction method was developed with an increase in the size of the annular block and segmentation of the blast furnace into four three-dimensional annular blocks or the like (see Patent Document 1).

In the method according to Patent Document 1, the removable casing of the old furnace and the annular block of the casing of the new furnace are sequentially suspended on a lifting device mounted in the column system of the blast furnace, and removed by taking the block on the side of the bottom of the furnace to the side.

However, in the section of the bottom (bottom) of the furnace in the body of the old furnace, the weight of the residue in the furnace hearth, which has cooled and hardened after blasting the blast furnace, is large, and in some cases the total weight is, for example, 8000 tons. Thus, its suspension is difficult.

[0004] A method has been proposed for dismantling the bottom of a blast furnace, which removes the heavy bottom of the furnace without suspension (see Patent Document 2).

In the method according to Patent Document 2, the foundation is divided into numerous elongated compartments extended in the direction of the lead, horizontal cutting of the foundation is carried out, and successively re-compaction of the slide plate and aggregate in each compartment, and after all compartments are re-compacted, the compartments are moved by sliding using a sliding plate, and carry this out only in the horizontal direction. According to this method, it is also possible to remove and discharge the massive lower part of the furnace having a weight exceeding 8,000 tons in the form of an annular block. With the above methods, the reconstruction period of the blast furnace design is reduced.

[0005] Meanwhile, as a technology prior to the above-described method of large-block construction, a method was also proposed for the combined removal of the old blast furnace body and mounting the new furnace body assembled elsewhere by pushing the new furnace body onto the foundation (see Patent Document 3).

However, in the method according to Patent Document 3, although the furnace body is moved in its entirety, the disadvantage is obvious that the system of columns of the furnace remains unchanged, and there is no description of the dismantling or construction of the system of columns of the furnace.

The reason for this is that at the current technical level of the blast furnace reconstruction method, countermeasures are mostly taken with respect to the expected life of the main body of the furnace (wear of the refractory lining, or the like), and a small expansion or the like is considered simply as a change in the volume of the furnace . Thus, since only the main body of the furnace is dismantled and reconstructed during repair, there is no need to dismantle and reconstruct the furnace column system that supports the furnace body, and the furnace column system is usually reused from the point of view of the length of the construction period and for economic reasons.

[0006] In addition, as a method of constructing high plant equipment designs, a method is proposed for the aggregate movement of the installation body and its outer frame to the foundation (see Patent Document 4).

In this method, since the bottom of the installation is a separate casing, the size of the installation casing and the frame is shortened by the value of the transported separate lower part of the installation. After mounting on the foundation, the shortened installation casing and frame are suspended and extended, and a separately movable lower part of the installation is mounted to complete the main installation casing. Thus, the method according to Patent Document 4 is similar to the method of large-block construction of a blast furnace. However, as also described in Patent Document 4, the method involves transportation using ships and vehicles, but does not imply such a large structure as a blast furnace. In addition, in Patent Document 4, although there is a description of the installation using a special folding truss, there is no description of the removal of the old structure.

LITERATURE LITERATURE

PATENT DOCUMENT (S)

[0007] Patent Document 1: JP-A-2006-283183

Patent Document 2: JP-B2-4300249

Patent Document 3: JP-A-52-13406

Patent Document 4: JP-A-58-106036

SUMMARY OF THE INVENTION

PROBLEM (S) RESOLVED BY THE INVENTION

[0008] As described above, since increasing the length of the shutdown period of a blast furnace results in significant economic damage, there is a need to further shorten the construction time to reduce the blowing period as much as possible.

However, in the large-block construction method, as described in the aforementioned Patent Documents 1 or 2, since there is a need for removal and removal of each annular block, and there is also a need for the operation of suspending the annular block in the furnace column system whenever the annular is removed or transferred block, shorten the period of reconstruction of the structure is difficult.

[0009] Furthermore, in the large block construction method, as described in the aforementioned Patent Documents 1 or 2, in order to suspend the respective annular blocks in the furnace column system, it is necessary to prepare the furnace column system during removal and removal of the furnace body, and there is a need for dismantling and reconstruction of the furnace column system separately from the furnace body, which makes it difficult to shorten the construction period.

In principle, it is possible to reuse the column system of the furnace from the housing of the old furnace to the housing of the new furnace without any change. However, in this case, the expansion of the furnace volume becomes limited in order to avoid obstacles from the column system of the old furnace.

[0010] Here, in the above Patent Document 3, with the combined movement of the furnace body, it is possible to eliminate the work of hanging from the furnace column system in the method of constructing from ring blocks, including in the method of large-block construction. However, in Patent Document 3, the furnace column system is not reconstructed, and the method cannot be used to reconstruct a blast furnace involving expansion of the furnace body volume.

Moreover, in the above Patent Document 4, since the proposed installation is small enough to be transported on ships or vehicles, the method disclosed therein cannot be directly applied for the reconstruction of a blast furnace, there is a need for work to increase and reduce the size of the frame and accession and disconnecting the bottom of the installation, and this method is not suitable for shortening the construction period.

[0011] Thus, in the large block construction method as described in the above Patent Documents 1 or 2, it is difficult to further reduce the construction time. Even with reference to Patent Documents 3 and 4, representing technologies prior to Patent Documents 1 and 2, it is difficult to remove the old furnace body and the columns system of the old furnace, and construct the new furnace body and the column system of the new furnace during the reconstruction of the blast furnace in a short period of time .

The purpose of the invention is to provide a method for reconstructing a blast furnace suitable for removing an old furnace body and a column system of an old furnace and constructing a new furnace body and a column system of a new furnace in a short period of time.

MEANS OF SOLVING THE PROBLEM (-LEM)

[0012] According to one aspect of the invention, the method consists in repairing a blast furnace that has a furnace body and a furnace column system mounted on an operational foundation, the method comprising: the step of constructing a new furnace in which a new foundation is being constructed, and constructing a column system of a new furnace and the housing of the new furnace on a new foundation at the construction site of the new furnace, different from the operational foundation; and

the foundation segmentation stage, in which the operational foundation is cut vertically to segment the operational foundation on the top of the foundation, on which the body of the old furnace and the system of columns of the old furnace are mounted, and the bottom of the foundation, and the stage of constructing a new furnace and the stage of segmenting the foundation are performed while the blast furnace is in operational condition;

blast furnace shutdown;

the process of removal of the old furnace, in which the top of the foundation is removed from the top of the bottom of the foundation together with the body of the old furnace and the column system of the old furnace; and

the stage of pushing a new furnace, in which they push on a new foundation on the bottom of the foundation together with the column system of the new furnace and the body of the new furnace.

[0013] In the above aspect of the invention, during the construction phase of the new furnace, while the old blast furnace is operating, the housing of the new furnace and the column system of the new furnace are built on top of the new foundation at the site for the construction of a new furnace, other than the installation blast furnace site. In addition, after the old blast furnace has been stopped by performing the removal stage of the old furnace and the stage of sliding the new furnace, it is possible to remove the old furnace body and the column system of the old furnace from the operational foundation, and completely move the new furnace body and the column system of the new furnace, assembled in advance. The removed casing of the old furnace and the column system of the old furnace can be properly disassembled in the state in which the new blast furnace begins to operate in operation, generally at another site for dismantling the old furnace.

Therefore, according to the invention, the period of reconstruction of the design of the blast furnace can be reduced by a period of time from about 50 to 70 days.

[0014] Depending on the volume of the furnace, in the traditional method, it takes from about 120 to 150 days to complete all the work from dismantling the old furnace body to constructing the new furnace body on the same foundation.

Moreover, even in the large-block building method or ring block building method described above, although the manufacture and dismantling of each ring block can be performed at a different place than the foundation, there is a need to segment the ring block, suspend and retract the old furnace body and introduce the ring block , and suspending and connecting the body of the new furnace to the foundation. In this case, about 80 to 120 days are required for the reconstruction period of the structure.

As described above, in the invention, since the main work on the foundation at the installation site of the blast furnace is limited to the stage of removal of the old furnace and the stage of sliding the new furnace, the reconstruction period of the blast furnace design can be significantly reduced.

[0015] Furthermore, in the invention, while moving the furnace body and the furnace column system together, it is also possible to simultaneously dismantle the old furnace body and construct the new furnace body. Construction time can also be shortened in this regard.

In addition, as a result of joint movement, including the furnace column system, equipment (such as a variety of installations, and piping and wire connections) mounted between the old furnace body and the old furnace column system can be pulled out from the foundation in the assembled state. In addition, equipment mounted between the housing of the new furnace and the column system of the new furnace is equipped in advance at the stage of construction of the housing of the new furnace for joint sliding onto the foundation. In this regard, construction time can also be shortened.

[0016] In addition, an essential feature of the invention is that since the column system of the old furnace is replaced by the column system of the new furnace at the same time as replacing the old furnace body with the new furnace body, even when the volume of the furnace in the new furnace body increases significantly, the size of the new furnace body not limited to the dimensions of the column system of the old furnace. That is, even in the case of a large casing of a new furnace that cannot fit in the column system of the old furnace, a large casing of the new furnace can be integrated into the corresponding column system of the new furnace during its construction, and it is also possible to sharply increase the degree of freedom with respect to expansion of volume ovens.

In addition, in the step of pushing the new furnace, since the movable body of the new furnace can be transported together in a stable state, being supported by the column system of the new furnace, the process can be reliably performed.

[0017] In the above aspect of the invention, in the step of pushing the housing of the new furnace, it is desirable that a reconstruction foundation is formed on the upper surface of the bottom of the foundation and the new foundation is pushed onto the upper surface of the reconstruction foundation together with the column system of the new furnace and the housing of the new furnace.

According to the invention, when cutting during the segmentation stage of the foundation or during work in the removal stage of the old furnace body, even when the upper surface of the foundation bottom is rough with large irregularities and the like, the upper surface may be covered with a reconstruction foundation, and the upper surface of the reconstruction foundation may be processed to high smoothness. Therefore, when mounting the sliding support of the transport device for pushing on the upper surface of the reconstruction foundation, it is possible to push the body of the new furnace with high accuracy.

[0018] In the aforementioned aspect of the invention, in the stage of constructing the housing of the new furnace, a transport device for sliding is used which extends straight from the site for constructing the housing of the new furnace to the operational foundation, and

in the process of discharging the old furnace, a discharge transport device is used, which is extended from the operational foundation towards the site where the construction stage of the new furnace is carried out, and extended from the position of changing direction in the intersecting direction, and

each of the transport device for the slide and the discharge transport device has a sliding support using anti-friction linings with solid lubricant between a pair of slide plates.

[0019] According to the invention, after the construction of a new blast furnace (the housing of the new furnace and the system of columns of the new furnace) on the new foundation in the stage of construction of the housing of the new furnace, the new foundation, the housing of the new furnace and the system of columns of the new furnace are transported to the operational foundation in the stage of sliding the housing new stove. At this time, using the straight-shaped transport device for pushing, it is possible to carry out transportation with minimal movement without changing direction or the like, thereby reducing the possibility of causing deformation and the like on the casing of the new furnace and in the column system of the new furnace on the new foundation, and reliably perform movement.

[0020] Furthermore, in the conveying device for the removal of the old furnace, for example, a section from the operating foundation to the position of changing direction with the aforementioned transport device for thrusting can be partially used, and leveled and strengthened soil can be effectively used as a transporting device for thrusting. More specifically, in order to distribute the load from the massive body of the new furnace and the columns of the new furnace, sufficient soil hardening is performed on which the transport device for thrusting is mounted. With respect to the discharge conveyor device, there is also a need to strengthen the soil to accept the high load from the body of the old furnace and the columns system of the old furnace, and the partial use of the discharge transportation device together with the transport device for thrusting can reduce the work and the cost of strengthening the soil as a whole.

However, it should be noted that the invention is not limited to a partial alignment configuration of a common travel path on a take-away transport device and a transport device for thrust. The invention can be configured in such a way that the take-away transport device and the slide transport device are independent of each other.

[0021] In addition, since the take-away transport device changes the direction of travel half way of the transport device for pulling and is long in the intersecting direction, it is possible to arrange a site for dismantling the old furnace in a different place than the site for constructing a new furnace, and mutual interference can be avoided at the place of work.

In addition, since the body of the old furnace and the column system of the old furnace are dismantled after they are removed, there are no problems even when deformation or the like occurs, and there is no difficulty with respect to the discharge transport device undergoing a change of direction. In view of these circumstances, the straightforward configuration of the transport device for pushing and changing the direction of the transporting device in the intersecting direction is most desirable in the invention.

However, the invention is not limited to a configuration in which the transport device for pushing is made straightforward, and the discharge transport device undergoes a change of direction in the intersecting direction in the middle position (i.e., half way). The invention can be configured so that the discharge transport device is made rectilinear, and the transport device for pushing undergoes a change of direction in the intersecting direction in the middle position.

[0022] In the above aspect of the invention, each of the take-away transport device and the slide transport device may undergo a change of direction. For example, it may be provided that the transport device for overthrowing may undergo a change of direction in the intersecting direction halfway along the movement path, and the discharge transport device may undergo a change in direction in the intersecting direction from half way of the transport device for overcoming. For example, the joint portion of the travel path may be extended from the mounting site of the blast furnace, the transport device for pushing may be extended from the end portion toward the site for constructing a new furnace in the intersecting direction, and the discharge transport device may be extended towards the site for dismantling the old furnace from the end to the opposite side.

[0023] In the above aspect of the invention, each of the take-away transport device and the transport slide device can be configured in a straightforward manner. In this case, the discharge transport device and the slide transport device must be independent of each other, and, for example, a configuration can be used in which the discharge transport device is linearly extended to one side of the operating foundation and the slide transport device is extended in the other direction . At this time, the angle formed between the take-off transport device and the slide transport device is not limited to a configuration that is 180 degrees (devices are placed on the same line) or 90 degrees, but a configuration that is such an angle as 45 degrees or 60 degrees. The rationale for this is that since, according to the invention, the system of columns of the furnace is also moved together, there is no such restriction as the angle that allows the passage of the system of columns of the furnace.

[0024] In addition, according to the invention, it is possible to carry out the movement of a new foundation, a housing of a new furnace, and a column system of a new furnace in the step of pushing a new furnace by sliding operation between the sliding plates in a sliding support such as sliding plates, in which a pair of sliding plates slip along one another.

More specifically, when a mechanical structure is used (e.g., transport wheels or rollers) and high load is applied by the weight of the massive body of the new furnace and the column system of the new furnace, the part of the mechanical structure that accepts the concentrated load is deformed or damaged with reduced functionality, and movement can become difficult. However, when transported using such a pair of sliding plates, a high load can be perceived with the load distribution over the vast sliding surface, and since local deformation of the continuous sliding surface almost does not occur, it is possible to reliably move even the huge body of the new furnace and the column system of the new furnace.

[0025] In addition, by placing anti-friction linings with solid lubricant between a pair of sliding plates, mutual friction can be further reduced and smooth movement can be performed with high accuracy, and thereby, even when the assembled new blast furnace is moved in its entirety, the operability of the new blast furnace is not impaired.

It should be noted that with respect to a sliding support of the type of sliding plates, which allows the pair of sliding plates to slide against each other and to move the furnace body with high load using them, it is desirable to refer to the above Patent Document 2. As an anti-friction liner with solid lubricant, it is preferable the use of a liner on which a solid lubricant, for example, a solid lubricant in the form of a fine powder, such as polytetrafluoroethylene resin (PTFE), molybdenum disulfide and graphite firmly bound to the surface of the substrate.

The sliding support can be used not only in the transport device for the thrust used in the construction stage of the new furnace, but also in the discharge transport device, which is used in the stage of removal of the old furnace.

[0026] In the above aspect of the invention, the aforementioned thrust transport device and the take-off transport device are particularly preferably mounted with the platform (s) as described below and the sliding support (s) along the travel path to perform the transport operation with using the platform (-orm) and the sliding support (s).

[0027] Firstly, in the aforementioned aspect of the invention, it is possible that when the discharge transport device includes a first travel path extended from the operational foundation towards the site where the new furnace is being built, a second travel path extended in the intersecting direction from half the distance the first movement path, a discharge platform that can move along the first movement path, a platform for moving along a branch that can move along the second travel path a hole, and a recess, which is formed in the ground along the second path of movement and includes a platform for moving along the branch,

the first movement path includes a sliding support, which extends from the upper surface of the discharge platform to the upper surface of the foundation bottom and includes a sliding surface having a height adjusted to level L1, a sliding support that is formed between the lower surface of the discharge platform and the ground, and includes a sliding surface, having a height adjusted to level L2 and a sliding support that is formed on the upper surface of the platform to move along the branch and includes over a sliding height having a height adjusted to level L2,

the second movement path includes a sliding support, which is formed between the lower surface of the platform for movement along the branch and the bottom surface of the recess, and includes a sliding surface having a height adjusted to level L3,

the transport device for pushing includes a third travel path extended from the new foundation towards the operational foundation, a sliding platform that can move along the third travel path and supports the new foundation, and a support member located in the recess at half the distance of the third travel path,

the third travel path includes a sliding support, which is formed between the bottom surface of the slide platform and the ground, continues to a place near the bottom of the foundation through the upper surface of the support element, and includes a sliding surface having a height adjusted to level L2, a sliding support, which is formed between the upper surface sliding platform and the lower surface of the new foundation, and includes a sliding surface having a height adjusted to level L4, and a sliding support, which formed between the upper surface reconstruction foundation and the bottom surface of the new foundation, and includes a sliding surface having a height adjusted to level L4, and

the heights of the sliding surfaces of the sliding supports are correlated as level L4> level L1> level L2> level L3.

[0028] According to the invention, when the old furnace body and the top of the foundation are retracted from the production foundation using a sliding support of level L1, and when the old furnace body and the top of the foundation are moved using a take-off platform along the sliding support of level L2 until the subsequent change of direction, movement can be prevented only the body of the old furnace or the top of the foundation for a short distance, you can use the outlet platform to move a longer distance, and you can perform a smooth and tabilnoe movement. In addition, since the platform for moving along the branch moves by means of a sliding support of level L3 lower than level L2, it is possible to install the body of the old furnace or the top of the foundation on the upper surface of the platform for moving along the branch using the outlet platform, and you can change direction without interference.

In addition, when a new blast furnace and a new foundation are pushed in using a sliding platform that slides at the same level L2 as the movement of the discharge platform, smooth and stable movement can be performed, and hardening or the like of the soil can be shared. In addition, using a sliding support level L4 higher than level L1, when pushing a new blast furnace and a new foundation from a sliding platform, you can slide a new blast furnace and a new foundation on the upper surface of the reconstruction foundation.

[0029] Secondly, in the aforementioned aspect of the invention, it is possible that the discharge transport device includes a first travel path extended from the operational foundation towards the site where the stage of constructing the new furnace is carried out, a second travel path extended in the intersecting direction from half the distance of the first a movement path, and a discharge platform that can move from the first travel path to the second travel path,

the first travel path includes a sliding support that extends from the upper surface of the discharge platform to the upper surface of the base floor and includes a sliding surface having a height adjusted to level L1 and a sliding support that is formed between the lower surface of the discharge platform and the ground and includes a sliding surface having a height adjusted to level L2,

the second travel path includes a sliding support, which is formed between the lower surface of the discharge platform and the ground, continues with a sliding support of level L2 on the first moving path in the intersecting direction, and includes a sliding surface having a height adjusted to level L2,

a transport device for sliding includes a third travel path, extended from the new foundation towards the operational foundation, and a slide platform that can move along the third travel path and supports the new foundation,

the third travel path includes a sliding support, which is formed between the bottom surface of the sliding platform and the ground, extends to a place near the bottom of the foundation, and includes a sliding surface having a height adjusted to level L2, a sliding support that is formed between the upper surface of the sliding platform and the lower surface new foundation, and includes a sliding surface having a height adjusted to level L4, and a sliding support that is formed between the upper surface of the re onstruktsionnogo foundation and the bottom surface of the new foundation, and includes a sliding surface having a height adjusted to level L4, and

the heights of the sliding surfaces of the sliding supports are correlated as level L4> level L1> level L2.

[0030] According to the invention, essentially the effect described above can be achieved, and the body of the old furnace and the top of the foundation can only be diverted using a tapping platform that slides by means of a sliding support of level L2. Thus, it is possible to exclude the construction of the platform described above for movement along the branch and excavation.

[0031] Thirdly, in the above aspect of the invention, it is possible that the discharge transport device includes a first movement path extended from the operational foundation towards the site where the new furnace construction step is performed, a second movement path extended in an intersecting direction from half the distance of the first path movement, a branching platform mounted on the ground along the second path of movement, a platform for moving along the branch, which can move along the branching boards ormy and an intermediate platform which is connected to and branch operational foundation platform along the first transport path,

the first movement path includes a sliding support, which extends from the upper surface of the platform to move along a branch to the upper surface of the foundation bottom through the upper surface of the intermediate platform, and includes a sliding surface having a height adjusted to level L1,

the second movement path includes a sliding support, which is formed between the lower surface of the platform for movement along the branch and the upper surface of the branch platform, and includes a sliding surface having a height adjusted to level L3 ’,

the transport device for the slide includes a third travel path extended from the new foundation towards the operational foundation, a construction platform that supports the new foundation, and an auxiliary platform that is mounted on a branch platform and an intermediate platform halfway the third travel path,

the third travel path includes a sliding support, which is formed between the lower surface of the new foundation and the upper surface of the construction platform, extends to the upper surface of the reconstruction foundation through the upper surface of the auxiliary platform, and includes a sliding surface having a height adjusted to level L4, and

the heights of the sliding surfaces of the sliding supports are correlated as level L4> level L1> level L3 ’.

[0032] According to the invention, during the discharge, since the body of the old furnace or the top of the foundation slides directly by the sliding mechanism of level L1 and moves directly to the direction of change of direction, the discharge platform can be omitted. When changing direction, since the platform is used to move along the branch using a sliding support of level L3 ', lower than level L1, you can install the body of the old furnace or the top of the foundation on the upper surface of the platform to move along the branch, and you can easily change direction . On the other hand, during the pushing, the housing of the new furnace or the new foundation slides in a controlled manner by means of a sliding support of level L4, and can be directly pushed onto the operational foundation. At this time, using a sliding support of level L4 higher than level L1, a new blast furnace and a new foundation can be pushed onto the upper surface of the reconstruction foundation. At this time, using a sliding support of level L4 higher than level L1, a new blast furnace and a new foundation can be pushed onto the upper surface of the reconstruction foundation.

[0033] In the above aspect of the invention, it is desirable that the transport device for pushing includes: a guide recess that extends in the direction of movement on the fixed side of the sliding support; and a guide unit coupled to the guide recess on the moving side, the guide unit being mounted in two front and rear positions in the direction of movement of the moving side.

According to the invention, due to the coupling of the guide recess with the guide block, even when the moving side of the transport device for pushing somehow shows a tendency to move in a different direction than the predetermined direction of transportation, since the vertical load applied to the moving side is quite high ( that is, the weight of the entire blast furnace), the guide block cannot go beyond the steps of the guide recess. Therefore, since the guide block is held in the guide recess and the wiring continues, the moving side can only move in a predetermined conveying direction, thereby ensuring stability and high accuracy of movement.

[0034] In the aforementioned aspect of the invention, it is desirable that the transport device for thrusting provide accuracy with a horizontal error of 3 mm or less per 1 m of travel.

According to the invention, since the movement of the new foundation, the housing of the new furnace and the column system of the new furnace in the stage of sliding the housing of the new furnace, as described above, is performed with high accuracy and stability, it is possible to sufficiently prevent deformation or the like that occurs in the housing of the new the furnace and the column system of the new furnace on a new foundation, and reliable transportation with high accuracy can be performed.

[0035] According to the invention, by limiting the foundation work to the removal stage of the old furnace and the sliding stage of the new furnace, it is possible to limit the reconstruction period of the blast furnace design mainly to building periods in the removal phase of the old furnace and the sliding stage of the new furnace. Thus, it is possible to significantly reduce the reconstruction time of the structure.

Therefore, the invention can provide a method for reconstructing a blast furnace suitable for removing the body of the old furnace and the column system of the old furnace, and constructing the body of the new furnace and the column system of the new furnace in a short period of time.

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG. 1 is a flowchart generally illustrating a process for reconstructing a blast furnace according to a first exemplary embodiment of the invention.

FIG. 2 is a plan view illustrating a configuration of a workstation used in a repair according to a first exemplary embodiment.

FIG. 3 is a plan view illustrating a removal step of an old furnace according to a first exemplary embodiment.

FIG. 4 is a plan view illustrating a step of sliding a new furnace according to a first exemplary embodiment.

FIG. 5 is a side view illustrating a cut in a segmentation step of a foundation according to a first exemplary embodiment.

FIG. 6 is an enlarged side view illustrating the cutting operation in the foundation segmentation step according to the first exemplary embodiment.

FIG. 7 is an enlarged perspective view illustrating the cutting operation in the foundation segmentation step according to the first exemplary embodiment.

FIG. 8 is a side view illustrating a conveyance device used in the removal step of an old furnace according to a first exemplary embodiment.

FIG. 9 is a plan view illustrating a sliding support of a level L1 used in the removal step of an old furnace according to a first exemplary embodiment.

FIG. 10 is a plan view illustrating a sliding support of level L2 used in the removal step of an old furnace according to a first exemplary embodiment.

FIG. 11 is a plan view illustrating a sliding support of level L3 used in the removal step of an old furnace according to a first exemplary embodiment.

FIG. 12 is an enlarged perspective view illustrating a substantial portion of the conveying device used in the removal step of an old furnace according to a first exemplary embodiment.

FIG. 13 is a sectional view illustrating a substantial portion of the conveying device used in the removal step of an old furnace according to a first exemplary embodiment.

FIG. 14 is an enlarged sectional view illustrating a substantial part of the conveying device used in the removal step of the old furnace according to the first exemplary embodiment.

FIG. 15 is a plan view illustrating a substantial part of the conveying device used in the removal step of the old furnace according to the first exemplary embodiment.

FIG. 16 is a side view of a first conveying operation in a removal step of an old furnace according to a first exemplary embodiment

FIG. 17 is a side view of a second conveying operation in the removal step of an old furnace according to a first exemplary embodiment.

FIG. 18 is a side view illustrating a pulling device used in a conveying device according to a first exemplary embodiment.

FIG. 19 is a plan view illustrating a drawing apparatus used in a conveying device according to a first exemplary embodiment.

FIG. 20 is a side view illustrating a preparatory step in the step of pushing a new furnace according to a first exemplary embodiment.

FIG. 21 is a side view illustrating a transport device used in the pushing step of a new furnace according to a first exemplary embodiment.

FIG. 22 is an enlarged perspective view illustrating a substantial portion of the transport device used in the thrust step of a new furnace according to a first exemplary embodiment.

FIG. 23 is a side view of a first conveying operation in a thrust step of a new furnace according to a first exemplary embodiment.

FIG. 24 is a side view of a second conveying operation in a thrust step of a new furnace according to a first exemplary embodiment.

FIG. 25 is a side view illustrating a conveyance device used in the removal step of an old furnace according to a second exemplary embodiment.

FIG. 26 is a plan view illustrating a conveyance device used in the removal step of an old furnace according to a second exemplary embodiment.

FIG. 27 is a side view illustrating a conveyance device used in the removal step of an old furnace according to a third exemplary embodiment.

FIG. 28 is a plan view illustrating a sliding support of level L1 used in the removal step of an old furnace according to a third exemplary embodiment.

FIG. 29 is a plan view illustrating an L3 ’level sliding support used in the removal step of an old furnace according to a third exemplary embodiment.

FIG. 30 is a side view illustrating a transport device used in the pushing step of a new furnace according to a third exemplary embodiment.

FIG. 31 is a plan view illustrating a sliding support of level L4 used in the pushing step of a new furnace according to a third exemplary embodiment.

FIG. 32 is a plan view illustrating a removal step of an old furnace according to a fourth exemplary embodiment of the invention.

FIG. 33 is a plan view illustrating a step of sliding a new furnace according to a fourth exemplary embodiment.

FIG. 34 is a plan view illustrating a removal step of an old furnace according to a fifth exemplary embodiment of the invention.

FIG. 35 is a plan view illustrating a step of sliding a new furnace according to a fifth exemplary embodiment.

FIG. 36 is a plan view illustrating a removal step of an old furnace according to a sixth exemplary embodiment of the invention.

FIG. 37 is a plan view illustrating a step of sliding a new furnace according to a sixth exemplary embodiment.

FIG. 38 is a plan view illustrating a removal step of an old furnace according to a seventh exemplary embodiment of the invention.

FIG. 39 is a plan view illustrating a step of sliding a new furnace according to a seventh exemplary embodiment.

FIG. 40 is a cross-sectional view illustrating a thrust vehicle that is applicable in the fourth and fifth exemplary embodiments.

DESCRIPTION OF EMBODIMENT (S) FOR CARRYING OUT THE INVENTION

[0037] An exemplary embodiment (s) of the invention will be described (s) below with reference to the accompanying drawings.

First Exemplary Embodiment

Each drawing from Figures 1-4 schematically illustrates the process of reconstruction of a blast furnace, performed in this exemplary embodiment (Fig. 1), a top view of the configuration of the working platform used for repair (Fig. 2), the stage of removal of the old furnace (Fig. 3) , and the stage of pushing a new furnace (Fig. 4).

[0038] As shown in FIG. 2, a blast furnace being reconstructed in this exemplary embodiment (old blast furnace 10) is installed on the mounting site P1 of the blast furnace. On the assembly site P1 of the blast furnace, the body 11 of the old furnace and the system of 12 columns 12 of the old furnace are built on the operational foundation 13. The operational foundation 13 is rectangular in plan view, and the site P2 for the construction of the new furnace is placed on the axis A1, perpendicular to the midpoint of one side.

At site P2 for the construction of a new furnace, in stage S2 of the construction of a new furnace (see Fig. 1), which will be described later, a new blast furnace 20, including a housing 21 of a new furnace and a system of 22 columns of a new furnace, is built on the upper surface of the new foundation 23 The site P3 for dismantling the old furnace is located on the axis A2, extended in the orthogonal direction from the mid-position of axis A1, which connects the site P2 for the construction of a new furnace and the installation site P1 of the blast furnace.

[0039] In this exemplary embodiment, as illustrated in FIG. 1, while the operation (operation S1 of the old blast furnace) of the old blast furnace 10 mounted on the blast furnace installation site P1 continues, the construction stage S2 of the new furnace is started at the construction site P2 for constructing a new furnace, and the new furnace building 21 and the system 22 columns of the new furnace constituting the new blast furnace 20 are being built on the new foundation 23.

In this exemplary embodiment, the working volume of the housing 21 of the new furnace is increased to a larger value than the working volume of the housing 11 of the old furnace. Therefore, the profile of the system of 22 columns of the new furnace is wider than the profile of the system of 12 columns of the old furnace.

[0040] In the step S2 of constructing the new furnace, in addition to the basic structures, that is, the housing 21 of the new furnace and the column system 22 of the new furnace, auxiliary equipment, such as instrumentation, is placed in the new blast furnace 20 on the new foundation 23, and wiring and piping. The intensification of the acquisition of equipment in this process can reduce the amount of work needed to prepare the S6 stage for pushing the new furnace or to operate the S7 new blast furnace, which will be performed later on the P1 blast furnace installation site, and to reduce the construction time.

On the other hand, at the blast furnace installation site P1, while the operation of the old blast furnace S1 continues, the foundation segmenting step S3 is performed to segment the operational foundation 13 of the existing old blast furnace 10 to the top 14 of the foundation and the bottom 15 of the foundation (see Fig. 5 )

[0041] After the foundation is segmented, the old blast furnace 10 is blown S4, after which the old furnace removal step S5 is carried out, and the foundation top 14, on which the old blast furnace 10 moves, including the old furnace body 21 and the old furnace column system 22, are transported to site P3 for dismantling the old furnace.

As illustrated in FIG. 3, in the step S5 of discharging the old furnace, the foundation apex 14 carrying the old blast furnace 10 is moved away in the direction of the axis A1 (sometimes referred to as the direction along the axis A1 (A2, A3 ...), moved along the axis A2 with a change in direction, and transported to site P3 for dismantling the old furnace, at which time stage S2 of the new furnace is being continued.

[0042] The slide step S6 of the new furnace is performed following the step S5 of withdrawing the old furnace. The new foundation 23 carrying the new blast furnace 20 in the step S2 of constructing the new furnace is moved along the axis A1 and pushed onto the bottom of the foundation 15 after removing the top of the foundation 14 and the old blast furnace 10.

When a new blast furnace 20 is pushed onto the bottom of the foundation 15, pipelines and electrical wiring are connected to the housing 21 of the new furnace and the column system 22 of the new furnace to complete the new blast furnace 20. Then the blast furnace is blown to start operation S7 of the new blast furnace using the new blast furnace twenty.

Then, the top of the foundation 14 and the old blast furnace 10, pushed back in the step S5 of removal of the old furnace, are disassembled by performing the step S8 of dismantling the old furnace at site P3 for dismantling the old furnace. At this time, the operation S7 of the new blast furnace at the installation site P1 of the blast furnace is separately initiated, and the step S8 of dismantling the old blast furnace can be performed independently of the operation of the blast furnace, and may develop gradually depending on the desired schedule.

[0043] Next, the foundation segmenting step S3, the old furnace removal step S5, and the new furnace pushing step S6 in this exemplary embodiment will be described in detail.

[0044] Stage S3 Segmentation Foundation

Figures 5-8 illustrate the details of the foundation segmentation step S3 in this exemplary embodiment.

In the foundation segmenting step S3, as illustrated in FIG. 5, an operational foundation 13 mounted on a blast furnace installation site P1 is cut horizontally at level L1 and segmented to the top 14 of the foundation and the bottom 15 of the foundation.

The old blast furnace 10 (having the housing 11 of the old furnace and the system of 12 columns of the old furnace) is built on the operational foundation 13. The base vertex 14 cut off during segmentation can be moved horizontally together with the old blast furnace 10 built on the upper surface. The bottom 15 of the foundation remains, being fixed on the installation site P1 of the blast furnace.

[0045] For cutting in the foundation segmenting step S3, in the production foundation 13, numerous strip-shaped slotted compartments (top view) along the A1 axis described above can be made first, and then a horizontal section is made using a wire saw for each slotted compartment. Perhaps the application of the procedure described in the above Patent Document 2.

[0046] As illustrated in FIG. 6, each slotted compartment (T1, T2, T3, ...) from the side surface (the side surface facing the site P2 for the construction of a new furnace, or the opposite side surface) of the operating foundation 13 is drilled with a drill in the positions of each edge (B1, B2 , ...) with the formation of a through hole 91, which passes through the operational foundation 13 in the direction of the axis A1. Then, a guide member 92, such as an I-beam (H), is inserted into the through hole 91, and the wire saws 93 are held at the heights of the upper edge and the lower edge of the guide member.

Wire saws 93 can horizontally cut the material (brick, which forms the operational foundation 13) of the slot compartment T2, located, for example, in the gap between the edges B1 and B2, being placed to move through two through holes 91 and around them at the positions of the edges B1 and B2.

[0047] When performing such a horizontal cut in two upper and lower positions inside the through hole 91, the operational foundation 13 is segmented onto the top 14 of the foundation and the bottom 15 of the foundation with a slotted compartment T2. Then, after removing the cut material having a predetermined thickness, a cavity 94 is formed between the top 14 of the foundation and the bottom 15 of the foundation.

It should be noted that even when a cavity 94 is created in the slotted compartment T2, then, since the adjacent slotted compartments T1 and T3 have not yet been cut, the top 14 of the foundation is maintained at a predetermined interval relative to the bottom 15 of the foundation.

[0048] As illustrated in FIG. 7, when a cavity 94 is formed, a fixed-side sliding plate 81, a moving-side sliding plate 82, and a heavily loaded anchor 95 are inserted into the cavity 94.

The fixed-side sliding plate 81 is laid on the lower surface of the cavity 94, that is, the upper surface of the foundation bottom 15. As the fixed-side sliding plate 81, a stainless alloy or the like having a low coefficient of friction is used.

The sliding side sliding plate 82 is mounted on the upper surface of the fixed side sliding plate 81. On the surface of the sliding plate 82 of the movable side, which faces the sliding plate 81 of the fixed side, an anti-friction liner 83 containing a solid lubricant is placed.

[0049] As an anti-friction cladding 83, a cladding is possible in which a solid lubricant, for example, fine powders of polytetrafluoroethylene resin (PTFE), molybdenum disulfide, graphite and the like, is firmly bonded to the surface of the substrate.

Of these, the lining is most suitable (friction coefficient μ = approximately 0.06), formed by polytetrafluoroethylene resin, firmly glued to the surface of the metal plate with an epoxy resin or polyimide resin. For example, an industrial lining may be applied which is commercially available as “PILLAR FLUOROGOLD PILLAR No. 4801” from NIPPON PILLAR PACKING Co., Ltd.

[0050] The heavily loaded anchor 95 is an elongated, dense flexible bag having a length corresponding to the sliding plate 82 of the movable side and obtained by weaving fibers of aramid resin or the like. A heavily loaded anchor 95 is placed on the upper surface of the movable side sliding plate 82. In addition, when filling it with a liquid mortar, such as cement mortar, the upper surface of the highly loaded anchor 95 is pressed against the ceiling surface of the cavity 94, that is, the lower surface of the foundation top 14.

When the mortar hardens in this state, the foundation vertex 14 rests on the highly loaded anchor 95. In other words, the load from the foundation vertex 14 can be transferred to the foundation bottom 15 through the highly loaded anchor 95, the movable side sliding plate 82 and the fixed side sliding plate 81.

[0051] Returning to FIG. 6, when the top 14 of the foundation is in a state in which it rests on the bottom 15 of the foundation through a highly loaded anchor 95 and the like in the slotted compartment T2, then adjacent slotted compartments T3 and T1 are cut out.

In the step S3 of segmenting the foundation by sequentially performing the work as described above for each slot compartment, ultimately all the slotted compartments, that is, the entire operational foundation 13, are segmented onto the top 14 of the foundation and the bottom 15 of the foundation.

The sliding side sliding plates 82 and the fixed side sliding plates 81 inserted between the foundation top 14 and the foundation bottom 15 constitute a pair of conveying device that is used in the removal step S5 of the old furnace, which will be described later.

[0052] An Exhaust Transport Device 30 used in the S5 exhaust stage of an old furnace

In the basement segmenting step S3, installation of the discharge conveyor device 30 used in the next discharge step S5 of the old furnace is also carried out.

As shown in FIG. 8, in order to carry out the extraction work (see Fig. 3) in the old furnace discharge step S5, the discharge transport device 30 is equipped with a discharge platform 31 that can move along the axis A1 from a place close to the operating foundation 13 (see Fig. 3), and the platform 32 for movement along a branch that can move along the axis A2 from half the distance of the travel path of the discharge platform 31 (see Fig. 3).

[0053] The discharge platform 31 is a flat platform assembled from a set of shafts in a steel frame or the like, and a sliding support 42 located between the bottom surface and the ground. The upper surface of the discharge platform 31 is adjusted to the same height as the upper surface of the bottom of the foundation 15, and a sliding support 41 is created that extends from the upper surface of the discharge platform 31 to the upper surface of the bottom of the foundation 15. The height of the sliding surface of the sliding support 41 is set to level L1, and the height of the sliding surface of the sliding support 42 is adjusted to level L2.

[0054] The ramp platform 32 is a flat platform formed of a set of shafts in a steel frame or the like, and mounted in a recess 33 formed in the ground in the direction of the A2 axis. One end of the recess 33 is located on the path that connects the installation site P1 of the blast furnace and the site P2 for the construction of a new furnace, and the other end is located on the site P3 for dismantling the old furnace.

Between the bottom surface of the recess 33 and the lower surface of the platform 32 to move along the branch, a sliding support 43 is placed. The height of the sliding surface of the sliding support 43 is adjusted to the level L3.

The upper surface of the ramp platform 32 is set to the same height as the ground. Although most of the aforementioned sliding support 42 is located on the ground, part of it is mounted on the upper surface of the platform 32 to move along the branch.

[0055] As shown in FIG. 9, the sliding support 41 located on the upper surface of the discharge platform 31 is configured using the fixed-side sliding plate 81 described in FIG. 7, and sliding plate 82 of the movable side with anti-friction cladding 83 placed thereon.

The sliding plate 81 of the fixed side of the sliding support 41 is mounted continuous from the upper surface of the bottom of the foundation 15 to the upper surface of the outlet platform 31. The sliding plate 82 of the moving side of the sliding support 41 is mounted from the lower surface of the base vertex 14 for sliding relative to the sliding plate 81 of the fixed side of the sliding support 41.

Using such a sliding support 41, the foundation peak 14 can be horizontally extended along the sliding surface of level L1, and can be placed on the upper surface of the discharge platform 31.

[0056] As shown in Figures 10 and 12, like the above-described sliding support 41, the sliding bearing 42 on which the take-off platform 31 slides (see FIG. 8) includes a fixed-side sliding plate 81 described in FIG. 7 and the sliding plate 82 of the movable side with the antifriction lining 83 placed thereon.

The sliding plate 81 of the fixed side of the sliding support 42 is mounted continuous from a place near the bottom of the foundation 15 to the upper surface of the platform 32 to move along the branch. The sliding plate 82 of the moving side of the sliding support 42 is mounted from the lower surface of the outlet platform 31 for sliding relative to the sliding plate 81 of the fixed side of the sliding support 42.

Using such a sliding support 42, the discharge platform 31 with the foundation vertex 14 placed on it can be horizontally extended along the sliding surface of level L2, and can be placed on the upper surface of the platform 32 for movement along the branch.

[0057] As shown in Figures 11 and 12, similar to the sliding support 41 described above, the sliding bearing 43 on which the platform 32 slides for movement along a branch includes a fixed-side sliding plate 81 described in FIG. 7 and the sliding plate 82 of the movable side with the antifriction lining 83 placed thereon.

The sliding plate 81 of the fixed side of the sliding support 43 is placed continuous from one end to the other end of the recess 33. The sliding plate 82 of the moving side of the sliding bearing 43 is mounted from the lower surface of the platform 32 to move along the branch for sliding relative to the sliding plate 81 of the fixed side of the sliding bearing 43.

Using such a sliding surface support 43, the ramp platform 32, on which the foundation apex 14 and the outlet platform 31 are mounted, can be horizontally extended along the sliding surface of level L2, and can be moved to the site P3 for dismantling the old furnace.

[0058] Ground Reinforcement of the Conveyor Transport Device 30

In the discharge transport device 30 (see Fig. 8), the sliding support 42 is placed on the ground, and the sliding support 43 is mounted on the bottom surface of the recess 33. The soil and the bottom surface on which the sliding supports 42 and 43 are mounted are subjected to soil reinforcement or the like for obtaining sufficient rigidity to withstand heavy loads such as a blast furnace body. In addition, reinforcing steel material 34 is placed on the ground and on the bottom surface (see Fig. 12), which receives the sliding supports 42 and 43.

[0059] As shown in FIG. 12, a reinforcing steel material 34, such as an I-section steel bar having a flat upper surface, is buried in the ground on which the sliding support 42 is mounted. A beam 96 is placed on the upper surface of the reinforcing steel material 34 for leveling using a long steel slabs. The sliding plate 81 of the fixed side of the sliding support 42 rests on the upper surface of the beam 96 at level L2. The proper placement of the shim between the beam 96 and the upper surface of the reinforcing steel material 34 is ensured by the linearity in the longitudinal direction of the beam 96, and the upper surfaces of all parallel beams 96 are adjusted level L2.

In addition, similar reinforcing steel material 34 and beam 96 are also mounted on the bottom surface of the recess 33, on which the sliding support 43 is placed, and the sliding plate 81 of the fixed side of the sliding support 43 is supported at L3 by the reinforcing steel material 34 and beams 96.

[0060] The sliding support 42 is placed continuous from the ground in contact with the side surface of the bottom of the foundation 15 to the upper surface of the platform 32 for movement along the branch. However, when the ramp platform 32 is moved using the slide support 43, the sliding plate 81 of the fixed side of the slide support 42 is cut off at an edge portion of the ramp platform 32 (the dotted line in Fig. 12) and is separated from the slide support 42 outside the recess 33 remaining in the ground.

[0061]

Guide Design 50 Retractable Transport Device 30

In the discharge platform 31 and the platform 32 for moving along the branch of the discharge transportation device 30 (see Fig. 8), a guide structure 50 is mounted in each of the sliding supports 42 and 43.

As illustrated in FIG. 13, the aforementioned reinforcing steel material 34 is buried in the ground and a discharge platform 31 rests on it. A sliding support 42 is placed between the upper surface of the reinforcing steel material 34 and the lower surface of the discharge platform 31.

[0062] As illustrated in FIG. 14, in the central of the sliding bearings 42 described above, a guide recess 51 is formed which is linearly extended along the longitudinal direction (axis A1 direction of FIG. 2) of the sliding bearing 42.

The guide recess 51 is deep enough so that the sliding support 42 extends to the reinforcing steel material 34. On the other hand, a guide block 52 made of steel is formed on the lower surface of the discharge platform 31, which can fit in the guide recess 51.

The cross-sectional shapes of the guide block 52 and the guide recesses 51 are such that the corresponding vertices are rectangular and the bottom parts are semicircular, and a predetermined clearance necessary for sliding is provided between the respective profile contours. Cross-sectional shapes may have other profiles.

As illustrated in FIG. 15, the guide unit 52 is fixed on the lower surface of the discharge platform 31 in two positions of the front side and the rear side in the direction of movement.

[0063] When there are two guide blocks 52 engaged with the guide recesses 51 that are extended in a straight line, the guide structure 50 accurately maintains the orientation of the discharge platform 31 continuously in the direction of the guide recess 51 (that is, along the axis A1, which represents the transportation direction of the sliding support 42). In addition, since the interface between the guide unit 52 and the guide recess 51 is maintained even during the movement when the take-off platform 31 is moved in the conveying direction, the take-off platform 31 can be accurately moved to the expected predetermined position, while at the same time adjusting the conveying direction.

For example, even when the exhaust platform 31 for some reason tries to move in a different direction than the predetermined conveying direction, since the vertical load on the exhaust platform 31 is the weight of the entire heavy blast furnace, the guide unit 52 cannot go beyond the steps of the guide recess 51 Therefore, the guide unit 52 is held in the guide recess 51 and continuously provides the proper direction, and the discharge platform 31 can only move in advance According to the specified transportation direction without wobble.

[0064] Transportation in Stage S5 Lead Old Furnace

In the step S5 of discharging the old furnace by sequentially performing the first transportation operation described below, the second transportation operation and the third transportation operation using the discharge transport device 30 described above, the old blast furnace 10 located on the blast furnace installation site P1 is moved to the site P3 for dismantling the old ovens.

[0065] In the first transportation operation, as illustrated in FIG. 16, by shifting the foundation top 14 in the direction of the A1 axis (see Fig. 3) to cause the sliding support 41 to slide at the level L1, the foundation top 14 and the old blast furnace 10 installed on top of the foundation top 14 are jointly removed from the upper surface of the bottom 15 foundation and move to the upper surface of the discharge platform 31.

In a second transportation operation, as illustrated in FIG. 17 by shifting the discharge platform 31 in the direction of the axis A1 (see Fig. 3) to cause the sliding support 42 to slide at the level L2, the discharge platform 31, and the foundation apex 14 and the old blast furnace 10 located on the discharge platform 31 are entirely moved to the upper surface of the platform 32 for movement along the branch.

In the third transportation operation by shifting the platform 32 to move along the branch in the direction of the A2 axis (see Fig. 3) to cause the sliding support 43 to slide at the level L3, the platform 32 for moving along the branch, the top 14 of the foundation and the old blast furnace 10 located on it completely move to the site P3 for dismantling the old furnace (see Fig. 3).

[0066] By sequentially performing the first conveying operation, the second conveying operation, and the third conveying operation described above, the old blast furnace 10 located at the blast furnace installation site P1 can be moved to the old furnace removal platform P3, thereby completing the furnace body removal step S5, illustrated in FIG. 3.

[0067] When moving the apex 14 of the foundation, the discharge platform 31 and the platform 32 to move along a branch in the above-described transportation operations from the first to the third, any action of pulling from the front side in the direction of movement, or pushing from the back side, can be applied, but it is preferable, for example, to perform the following stretching.

[0068] As an example, in the first transportation, when the foundation top 14 and the old blast furnace 10 are jointly moved, a cable can be connected to the top of the foundation 14 and the top of the foundation can be pulled out by a winch from the side of site P2 to build a new furnace. It can be used to draw a hydraulic jack, such as a hydraulic cylinder with a central hole, or other drive devices.

At this time, since the new foundation 23 and the new blast furnace 20 built on it are located on the site P2 for the construction of a new furnace, which is located in the pulling direction, the traction cable is inserted into the gap of the frame of the new foundation 23 or stretched on both sides of the platform P2 for the construction of a new furnaces to circumvent a new foundation 23.

[0069] Figures 18 and 19 illustrate one example of a specific drawing apparatus.

The pulling device 70 has four hydraulic cylinders 71 with a central hole mounted in parallel on the ground near the site P2 for the construction of a new furnace, and the corresponding traction cables 72, extended to the operational foundation 13 along the axis A1, which represents the direction of the outgoing transport.

Through holes 14 are formed at the vertex 14 of the foundation of the operational foundation 13, passing through both lateral surfaces of the foundation top in the direction of the A1 axis, and the cables 72 are let out through the holes through the openings from the side surface of the foundation peak 14 from the side opposite to the platform P2 for constructing a new furnace. The support 73 receiving the reaction force is inserted and firmly fixed on the front end of each of the outwardly pulled out cables 72.

[0070] In such a pulling device 70, the tension of the respective cables 72 with the synchronized operation of four hydraulic cylinders 71 with a central hole, a horizontal pulling force is applied to the top of the foundation 14. Thus, the top 14 of the foundation is displaced relative to the bottom 15 of the foundation along the support member 35, and as a result of the displacement, the aforementioned first transportation is performed.

It should be noted that due to the large weight of the foundation vertex 14 and the housing of the 11 old furnace and the system of 12 columns of the old furnace placed on it, tremendous pulling force is applied to the cables 72, but since the cables are pressed against the lateral surface of the foundation peak 14 over a large area using a sensing reaction force the abutment 73, cracking or the like around the through hole in the apex 14 of the foundation as a result of concentration of the load does not occur.

[0071] Such a pulling device 70 is also used in the second and third conveying operations.

In a second transportation operation, as illustrated in FIG. 18, the hydraulic cylinder (s) 71 with a central hole, like a pulling device 70 in the first transportation operation, is installed on the ground near the site P2 for the construction of a new furnace, the cables 72 extended along the axis A1 are connected to the discharge platform 31 using a sensing force reaction stops 73, and pull the outlet platform.

In the third transportation operation, although this is not illustrated in the drawings, the hydraulic cylinder (s) 71 with a central hole, like a drawing device 70 in the first transportation operation, is installed on the site P3 for dismantling the old furnace, cables 72 extended along the axis A2 connect with a platform 32 for moving along the branch with the help of a sensing reaction force of the stop 73, and pulling out the platform for moving along the branch.

[0072] Preparation in Stage S6 Sliding New Furnace

As shown in FIG. 4, the old blast furnace 10 is transported from the assembly site P1 of the blast furnace to the site P3 for dismantling the old furnace in the above-described removal step S5 of the old furnace. Then, in step S6 of pushing the new furnace, the new blast furnace 20, assembled at the site P2 for constructing the new furnace, is moved to the top of the bottom 15 of the foundation of the operational foundation 13 after removing the old blast furnace 10.

[0073] As shown in FIG. 20, when the removal stage of the old furnace is completed S5, the remainder of the discharge transport device 30 on the upper surface of the foundation bottom 15 is a portion (fixed plate sliding plate 81 according to FIG. 7) of the sliding support 41, and a part (fixed side sliding plate 81 according to FIG. 7) the sliding support 42 remains on the ground between the bottom of the foundation 15 and the recess 33. In addition, a part (the sliding plate 81 of the fixed side according to Fig. 12) of the sliding support 43 remains in the recess 33 on the trajectory of the platform 32 for escheniya by branch.

Thus, in preparation for the step S6 of pushing the new furnace, the remnants of the discharge transport device 30 are removed, and the slide transport device 39 used to transport the step of sliding the new furnace is mounted.

[0074] As illustrated in FIG. 21, the slide transport device 39 has a slide platform 38 that supports the new foundation 23, a sliding support 44, which extends from the bottom of the slide platform 38 to the front side of the foundation bottom 15, a sliding support 45 that is mounted between the upper surface of the slide platform 38 and the lower the surface of the new foundation 23, and the sliding support 46, which is installed on the upper surface of the bottom 15 of the foundation.

It should be noted that each of the sliding supports 44, 45 and 46 includes the same components (that is, the fixed side sliding plates 81, the moving side sliding plates 82 and the anti-friction cladding 83 illustrated in Fig. 7), as the sliding supports 41 mentioned above -43, and the sliding bearings 44, 45 and 46 are continuously extended in the direction of the axis A1 (see Fig. 4).

[0075] A sliding support 44 is formed between the bottom surface of the slide platform 38 and the ground, and the fixed side formed on the ground is placed extended to the front of the bottom of the foundation 15.

The recess 33, as described above, is left halfway through the sliding support 44. Thus, a support member 35 is mounted on the recess 33 to support the sliding support 45 across the recess 33 over the entire surface.

For the sliding support 44, a portion of the sliding support 42 can be used, which remains on the ground between the bottom of the foundation 15 and the recess 33.

The sliding support 44 below the slide platform 38 is constructed in advance when the slide platform 38 is mounted.

[0076] Using such a sliding support 44, the slide platform 38 can be moved horizontally with a new foundation 23 and a new blast furnace 20 located on its upper surface, from the site P2 for constructing a new furnace to the front of the installation site P1 of the blast furnace.

The height of the sliding surface of the sliding support 44 is at the same level L2 as the sliding support 42. However, when a part of the sliding support 42 is not used, the height of the sliding surface may be at a different level.

In the portion of the sliding support 44 mounted on the ground, similar to the sliding support 42 described above, the soil is reinforced using reinforcing steel material 34 (see Fig. 12). However, when a portion of the sliding support 42 is used for the purpose of reinforcement, soil reinforcement is possible using reinforcing steel material 34, which can be applied directly.

[0077] A sliding support 45 is installed between the lower surface of the new foundation 23 and the upper surface of the slide platform 38 in advance when the new foundation 23 is mounted on the slide platform 38.

Using such a sliding support 45, the new foundation 23 can be horizontally moved relative to the movable platform 38.

The height of the sliding surface of the sliding support 45 is at the level of L4. The level L4 is adjusted at a higher height than the level L1 of the above-described sliding support 41.

[0078] The sliding support 46 includes a fixed side located on the upper surface of the bottom of the foundation 15 and a moving side (side of the new foundation 23) of the sliding support 45 described above.

Although the details will be described later, while the slide platform 38 is in contact with the bottom of the foundation 15, the new foundation 23 is horizontally moved relative to the slide platform 38 using the sliding supports 45 and 46, and moved to the upper surface of the bottom of the foundation 15.

[0079] To perform such a transfer, the height of the sliding surface of the sliding support 46 is at the same level L4 as for the sliding support 45.

In addition, in order to ensure the level L4 in the sliding support 46, a reconstruction foundation 26 is mounted on the upper surface of the bottom of the foundation 15, which carries the sliding support 46.

[0080] As shown in FIG. 22, when the removal step of the old furnace S5 is completed, on the upper surface of the bottom of the foundation 15 left from the production foundation 15 after the removal of the old furnace, there remains a sliding plate 81 of the fixed side (see FIG. 7) of the sliding support 41 located in the foundation segmenting step S3 . In this way, the sliding plate 81 of the fixed side of the sliding support 41 is removed. In addition, the upper surface of the base plate 15 open after removing the sliding plate 81 of the fixed side of the sliding support 41 is a surface formed by horizontal cutting using a wire saw in the basement segmenting step S3 , and residual irregularities are inevitable. Therefore, the upper surface of the bottom of the foundation 15 is cut off and removed to a predetermined thickness to even out the upper surface of the bottom of the foundation 15.

[0081] A reconstruction foundation 26 is placed on the upper surface of the ironed bottom 15 of the foundation.

The reconstruction foundation 26 has a retaining pad 84 located on the upper surface of the bottom of the foundation 15, a retaining pad pad 85 laid on the retaining pad 84, and a base mortar 86 that fills the gaps around the retaining pad 84 and hardens. The same beam 96 for leveling is placed on the upper surface of the pad 85 of the retaining pillow as the beam mounted on the upper surface of the reinforcing steel material 34 for strengthening the soil, as described above, and a sliding support 46 is mounted on the upper surface of the beam 96.

[0082] The retaining pad 84 is designed to support the sliding plate 81 of the fixed side of the sliding support 46 through the pad 85 of the retaining pad and the beam 96, and is placed on the upper surface of the bottom of the foundation 15 at a predetermined interval along the continuous direction of the fixed-plate sliding plate 81. Although the retaining cushion 84 is capable of supporting the weight of the fixed side sliding plate 81, by applying a deforming load to the supporting cushion 84 by the operator, the sliding surface of the fixed side sliding plate 81 is adjusted to level L4.

As such a retaining pad 84, anything can be applied insofar as the pad can support the weight of the fixed-side sliding plate 81, can be deformed in the mounting state and hardens over time from the moment of installation or in a given process. For example, it is possible to use a high viscosity liquid mortar or a thermosetting synthetic polymer material.

[0083] The retaining pad pad 85 is an adjusting pad (ie, a base plate made of steel), the height of the upper surface of the beam 96 is leveled to a predetermined level by adding or removing multiple gaskets, and thereby the upper surface, that is, the sliding surface the fixed side sliding plates 81 are adjusted to level L4.

The base mortar 86 is made of concrete or the like, and it fills the space around the retaining cushion 84 after adjusting the height of the sliding plate 81 of the fixed side. Base mortar 86 fill the space from the upper surface of the bottom of the foundation 15 to the height covering the side surface of the beam 96, and the side of the upper surface of the beam 96 and the sliding plate 81 of the fixed side are left open.

When the base mortar 86 hardens, the construction of the reconstruction foundation 26 is completed. The reconstruction foundation 26 withstands the height of the fixed plate sliding plate 81 at an adjusted height (i.e., in a state in which the sliding surface is at level L4).

[0084] As shown in FIG. 22, as described above, the sliding plate 81 of the fixed side of the sliding support 46 is supported so that the sliding support 46 is the level L4 of the sliding surface on the reconstruction foundation 26. When the new foundation 23 is moved onto it, the sliding plate 82 of the moving side of the lower surface of the new foundation 23 mounted as a sliding support 45, comes into sliding contact with the sliding plate 81 of the fixed side of the upper surface of the bottom of the foundation 15 through the antifriction lining 83, provided nnuyu on the surface of the moving side of sliding plates and thereby effect achieved as a rolling bearing 46.

[0085] As shown in FIG. 21, by successively moving the new foundation 23 and the new blast furnace 20 using the sliding supports 44, 45 and 46 described above, the new foundation 23 and the new blast furnace 20 can be transported to the top of the bottom 15 of the foundation. Sliding bearings 44, 45, and 46 constitute a transport device 39 for pushing.

It should be noted that in the transport device 39 for pushing, each of the sliding supports 44, 45 and 46 is adjusted with high accuracy to provide a horizontal error of 3 mm or less per 1 meter of travel distance.

In addition, in the transport device 39 for pushing between the fixed side of the sliding supports 44, 45 and 46 and the new foundation 23 and the sliding platform 38, a guide structure 50 similar to that in the discharge transport device 30 is placed. In this way, the position is stabilized during transportation, and you can move the new blast furnace 20 to the proper position on the bottom 15 of the foundation.

[0086] Transportation in Stage S6 Sliding New Oven

In the step S6 of sliding the new furnace by sequentially performing the first transportation operation and the second transportation operation described below using the aforementioned transporting device 39, the new blast furnace 20 located at the construction site P2 for constructing a new furnace is moved to the blast furnace installation site P1.

[0087] In the first transportation operation, as illustrated in FIG. 23, the sliding platform 38, placed on site P2 for the construction of a new furnace, is moved in the direction of the axis A1 (see Fig. 3) under the sliding movement of the sliding support 44 located at level L2, as a result of which the new blast furnace 20 is moved horizontally together, a new foundation 23 and a sliding platform 38, and transporting a new blast furnace 20, a new foundation 23 and a sliding platform 38 from the site P2 for the construction of a new furnace in a position adjacent to the bottom 15 of the foundation.

[0088] In the second transportation operation, as illustrated in FIG. 24, the new foundation 23, located above the slide platform 38 and located near the bottom of the foundation 15, is moved in the direction of the axis A1 (see Fig. 3) under the sliding movement of the sliding support 45 at level L4, for sliding the new blast furnace 20 and the new foundation 23 with joint horizontal movement, they are gradually transferred to a sliding support 46 located at the same level L4 and transported to the upper surface of the reconstruction foundation 26 formed on the bottom 15 of the foundation from the upper surface of the sliding platform rmy 38.

[0089] Thus, the new foundation 23 and the new blast furnace 20 are installed on the bottom 15 of the foundation, and the new blast furnace 20 is completely pushed onto the installation site P1 of the blast furnace.

It should be noted that in the first and second transportation operations, the movement of the sliding platform 38 and the new foundation 23 can be carried out by pulling or pushing, and it is possible to use the same design as the pulling device 70 (see Figures 18 and 19), which is used in the above-described step S5 leads of the old furnace.

In addition, the pushed new foundation 23 and the reconstruction foundation 26 are securely fixed until the new blast furnace is put into operation S7. For example, it is possible to carry out fastening by pouring and curing mortar with high fluidity between the new foundation 23 and the reconstruction foundation 26. Such fastening can be performed in a short period of time in parallel with the connection and the like of peripheral equipment to the new blast furnace 20.

[0090] Result of the First Exemplary Embodiment

The first exemplary embodiment provides the following results.

In the stage S2 of the construction of the new furnace, the housing 21 of the new furnace and the system of 22 columns of the new furnace in the form of a new blast furnace 20 can be built on the new foundation 23 at the site P2 for the construction of a new furnace other than the installation site P1 of the blast furnace in operational condition (operation S1 of the old blast furnace) of the old blast furnace 10. Furthermore, after stopping S4 of the old blast furnace 10, when performing step S5 of the removal of the old furnace and step S6 of sliding the new furnace, the top 14 of the foundation and the old blast furnace 10 (housing 11 of the old furnace System 12 columns of the old furnace) can be removed from the top of the operating foundation 13 and may be replaced together entirely new foundation 23 and a new blast furnace 20, which are constructed in advance. The removed old blast furnace 10 can be properly disassembled at yet another site P3 for dismantling the old furnace while the new blast furnace 20 is put into operation (operation S7 of the new blast furnace).

Thus, in this exemplary embodiment, the reconstruction period of the construction of the blast furnace can be reduced to a time of from about 50 to 70 days.

[0091] In addition, since replacing the top of the foundation 14 with the new foundation 23, and replacing the system of 12 columns of the old furnace with the system of 22 columns of the new furnace, is also performed together, in addition to replacing the body 11 of the old furnace with the body 21 of the new furnace, equipment (various devices, and piping and wiring systems) mounted between the casing 11 of the old furnace and the system 12 of the columns of the old furnace can be diverted outward from the foundation, while the equipment is stored in the assembled state. In addition, equipment mounted between the housing 21 of the new furnace and the column system 22 of the new furnace is equipped in advance in stage S2 of the construction of the new furnace and can be entirely transferred to the foundation. In this regard, construction time can also be shortened.

[0092] Further, in this exemplary embodiment, since the system of 12 columns of the old furnace is replaced by the system of 22 columns of the new furnace at the same time as the housing 11 of the old furnace is replaced by the body 21 of the new furnace, the volume of the furnace is not limited to the size of the system 12 of the columns of the old furnace, even when the volume the furnaces in the housing of the new oven are significantly increased.

In other words, the large housing 21 of the new furnace, which is not designed to accommodate the columns of the old furnace in the system 12, can be created by constructing the system of columns 22 of the new furnace in advance adapted to it. Accordingly, it is possible to significantly increase the degree of freedom in terms of enlarging the volume of the furnace.

In addition, in step S6 of sliding the new furnace, since the transported housing 21 of the new furnace can be entirely moved in a stable state, being supported by the column system 22 of the new furnace, the process can be performed reliably.

[0093] In this exemplary embodiment, using the transport device 39 for pushing can be performed transportation in step S6 thrust new furnace. In other words, the new foundation 23 and the new blast furnace 20, located on the site P2 for the construction of a new furnace, can be moved to the top of the bottom 15 of the foundation at the installation site P1 of the blast furnace.

At this time, using the straight-forward transport device 39 for pushing, it is possible to carry out transportation with a minimum travel distance without changing direction or the like, thereby reducing the likelihood of deformation or the like on the housing 21 of the new furnace and in the system of 22 columns of the new furnace on the new foundation 23, and perform reliable transportation.

[0094] In this exemplary embodiment, in the transport device 39 for sliding, the sliding supports 44, 45 and 46 are configured such that the fixed-side sliding plate 81 for a long distance is used as the fixed side (lower side), the short moving-side sliding plate 82 used as the movable side, the plates are formed of stainless steel alloy or the like having a low coefficient of friction, and antifriction lining 83 is provided on the sliding plate 82 of the movable side including solid lubricant. Thus, it is possible to significantly reduce the coefficient of friction with respect to the fixed side. Therefore, even when the new foundation 23 and the new blast furnace 20 being moved, including the housing of the new furnace 21 and the column system 22 of the new furnace, are heavy (for example, exceeding 8,000 tons), transportation can be carried out without hindrance.

[0095] In the transport device 39 for pushing, each of the sliding supports 44, 45 and 46 is adjusted with high accuracy so that the horizontal error is 3 mm or less per 1 meter of travel. Therefore, it is possible to sufficiently prevent deformation or the like that occurs in the housing 21 of the new furnace and in the column system 22 of the new furnace on the new foundation 23, and reliable transportation with high accuracy can be performed.

In the transport device 39 for sliding on the fixed sides of the sliding supports 44, 45 and 46, guide recesses 51 are formed, and on the lower surfaces of the new foundation 23 and the slide platform 23, the guide blocks 52 are formed as the movable side and in conjunction with them. a simple guide structure 50 does not exit the interface when wiring under the influence of the large weight of the new blast furnace 20, providing a stable spatial orientation during transportation, and you can slide a marketing blast furnace 20 in the exact position on the bottom 15 of the foundation.

In the transport device 39 for the upward movement, the transportation of the new blast furnace 20 and the new foundation 23 is carried out by horizontal movement of the sliding platform 38 at the level L2 using the sliding support 44, and horizontal movement at the level L4 using the sliding supports 45 and 46, reaching the upper surface of the bottom 15 the foundation from the upper surface of the slide platform 38. Thus, since the new blast furnace 20 and the new foundation 23 do not rise or fall at all, the period p design.

[0096] In this exemplary embodiment, the transport of the old furnace in step S5 can be carried out using the removal transport device 30, that is, the foundation apex 14 and the old blast furnace 10 located on the blast furnace installation site P1 can be transported to the site P3 for dismantling the old furnace.

At this time, the discharge transport device 30 is moved along the L-shaped path, in the middle of which the direction changes, and, in particular, part of the path (that is, the section from the place near the operational foundation 13 to the recess 33) is combined with the transport device 39 for sliding. Thus, it is possible to jointly and effectively use the soil, which is leveled and strengthened to withstand heavy loads.

[0097] More specifically, in order to absorb the heavy load from the new foundation 23, the housing 21 of the new furnace, and the column system 22 of the new furnace, sufficient soil reinforcement is provided on which a thrust transport path is provided. On the way of transportation during the lead, there is a need to strengthen the soil in order to absorb a large load from the top 14 of the foundation, the housing 21 of the old furnace and the column system 22 of the old furnace, and by partially sharing the transportation path during thrust and the transportation path during the lead, you can reduce the work on strengthening the ground in whole.

[0098] Since the take-away transport device 30 is extended from its middle to the crossing direction (direction along the A2 axis), while partially sharing the path with the transport device 39 for pushing (direction along the A1 axis), it is possible to arrange platform P3 for dismantling the old furnace in a different place than the site P2 for the construction of a new furnace, thereby avoiding mutual interference at the place of work.

It should be noted that since the casing 11 of the old furnace and the system 12 of the columns of the old furnace are disassembled after their removal, the problem does not arise even when deformation or the like occurs, and there is no problem even if the direction of movement of the discharge transport device 30 changes halfway discharge transport device.

[0099] In particular, a change in direction from the direction along the A1 axis to the direction along the A2 axis in the outlet transport device 30 is achieved by placing the outlet platform 31, which moves in the direction along the A1 axis, on the platform 32 to move along a branch that moves in the direction axis A2. Thus, since there is no need for a special mechanism for changing direction or the like, it is possible to perform work reliably and without interference.

In addition, in the direction along the A1 axis, a recess 33 is formed in which the platform 32 for moving along the branch must move, so that the platform 32 for moving along the branch can move at a level L3 lower in height than the level L2 at which the outlet platform 31. Thus, it is possible to create a device for placing the discharge platform 31 on the platform 32 for movement along the branch without using a lifting mechanism or other special devices.

[0100] In addition, the transportation of the old blast furnace 10 and the foundation peaks 14 is accomplished by horizontal movement at the level L1 of the sliding support 41 from the upper surface of the foundation bottom 15 to the upper surface of the discharge platform 31, by horizontal movement at the level L2 along the sliding support 42 of the discharge platform 31, and horizontal movement at level L3 along the sliding support 43 of the platform 32 to move along the branch. Thus, it is possible to stably carry out the transportation in step S5 of the removal of the old furnace with high accuracy, without raising and lowering the old blast furnace 10 and the top 14 of the foundation.

[0101] In this exemplary embodiment, in the take-away transport device 30, each of the sliding supports 41, 42 and 43 is configured so that the fixed-side sliding plate 81 is used over a long distance as the fixed side (lower side), the short sliding plate 82 the side is used as the moving side, the plates are formed of stainless steel alloy or the like having a low coefficient of friction, and antifriction is provided on the sliding plate 82 of the moving side blitzing 83 containing solid lubricant. Thus, it is possible to significantly reduce the coefficient of friction with respect to the fixed side. Therefore, even when the movable top of the foundation 14 and the old blast furnace 10, including the housing 11 of the old furnace and the system 12 of the columns of the old furnace, are heavy (for example, exceeding 8000 tons), transportation can be carried out unhindered.

[0102] In this exemplary embodiment, in the step S3 of segmenting the foundation, the cutting is sequentially performed in multiple slotted compartments so that the cutted section is filled with a highly loaded anchor. Thus, it is possible to vertically cut the operating foundation 13 and insert the sliding support 41 between the top 14 of the foundation and the bottom 15 of the foundation while the operation stage S1 of the old blast furnace continues, without raising or lowering the top 14 of the foundation, body 11 of the old furnace and system 12 columns of an old furnace.

[0103] Second Exemplary Embodiment

Figures 25 and 26 illustrate a second exemplary embodiment of the invention.

As in the above-described first exemplary embodiment, this exemplary embodiment represents the repair of a blast furnace in the general sequence illustrated in Figures 1-4. However, this exemplary embodiment differs from the above-described first exemplary embodiment in the configuration of the discharge conveying device 30A, which is used in the removal step S5 of the old furnace. Therefore, in the following description, a reiteration of the common features is not given, and the different parts will be described.

[0104] In the above-described first exemplary embodiment, in the removal transport device 30 (see FIG. 8), a recess 33 is formed in the ground, a sliding support 43 laid on its bottom surface, and a ramp platform 32 moving inside the recess 33 for performing the third transportation operation (transportation in the direction along the A2 axis, reaching the site P3 for dismantling the old furnace).

In the discharge transport device 30A of this exemplary embodiment, a recess 33 and a platform 32 for moving along the branch are absent, and the third transportation operation is performed at the same level L2 as in the second transportation operation.

[0105] As shown in Figures 25 and 26, the discharge transport device 30A is equipped with the same discharge platform 31 and sliding bearings 41 and 42, as in the first exemplary embodiment described above. The sliding support 41 is adjusted to level L1, and the sliding support 42 is set to level L2.

The sliding support 42 rests on the ground along its entire length, and is reinforced by the reinforcing steel material 34 illustrated in FIG. 12.

The sliding support 43 is mounted on the ground at the level L2 like a sliding support 42.

At the intersection between the sliding support 42 and the sliding support 43, the respective sliding plates 81 of the fixed side (see Fig. 7) intersect each other in the form of a lattice and are joined by welding, and then the upper surface serving as the sliding surface is smoothly polished.

[0106] In such an exemplary embodiment, in the second transportation operation, the discharge platform 31 is moved in the A1 direction using the sliding support 42 until the intersection of the sliding support 42 and the sliding support 43 is reached. Then, in the third transportation operation, the discharge platform 31 is moved from the intersection in the direction along the A2 axis using the sliding support 43 and delivered to the site P3 for dismantling the old furnace.

[0107] According to such an exemplary embodiment, it is also possible to obtain the same results as in the above-described first exemplary embodiment.

Moreover, in the discharge transport device 30A, since there is no need to form a recess 33, the construction techniques can be simplified.

On the other hand, at the intersection of the sliding support 42 and the sliding support 43, the upper surface serving as the sliding surface is smoothly polished after individually welding each of the sliding plates 81 of the fixed side. Therefore, it is advisable to make an appropriate choice in terms of which option from the first exemplary embodiment or this exemplary embodiment is applied taking into account the amount of work or the like, depending on the production conditions on the site and the like.

[0108] Third Exemplary Embodiment

A third exemplary embodiment of the invention is illustrated in each drawing of Figures 27-31.

As in the above-described first exemplary embodiment, this exemplary embodiment represents the repair of a blast furnace in the general sequence illustrated in Figures 1-4. However, this exemplary embodiment differs from the above-described first exemplary embodiment in the configuration of the discharge conveying device 30B used in the removal step of the old furnace S5, and the thrust transport device 39B used in the sliding step of the new furnace S6. In the following description, a reiteration of common features is omitted and the different parts will be described.

[0109] First, a discharge transport device 30B used in the removal step S5 of the old furnace will be described.

In the above-described first exemplary embodiment, the discharge transport device 30 (see FIG. 8) is equipped with a sliding support 41 in the direction along the A1 axis (level L1), a sliding support 42 in the direction along the A1 axis (level L2), and a sliding support 43 in the direction axis A2 (level L3), respectively, of each of the transportation operations from the first to the third. In addition, by adjusting the upper and lower surfaces of the outlet platform 31 to the level L1 and level L2, respectively, and adjusting the level L3 below a predetermined height of the level L2 (i.e., by forming a recess 33 and laying the sliding support 43 on its lower surface), the outlet platform 31 are placed on a platform 32 for movement along a branch to achieve a change in direction to a direction along the A2 axis.

[0110] On the contrary, in this exemplary embodiment, the discharge platform 31 and the second conveying operation are omitted, and as the first conveying operation, the foundation top 14 and the old blast furnace 10 are horizontally moved to the top of the platform 32 to move along the branch from the base plate 15 in the direction of axis A1 at level L1, and, as a third transportation operation, a platform 32 for moving along a branch, on which a foundation vertex 14 and an old blast furnace 10 are mounted, are moved in the direction along axis A2 at level L3 ’, lower than level L1.

Therefore, the discharge transport device 30B in this exemplary embodiment has the following features distinguishing it from the above-described first exemplary embodiment.

[0111] As shown in Figures 27, 28 and 29, an intermediate platform 61 is mounted on the ground from a location near the bottom of the foundation 15 toward the site of P2 for constructing a new furnace. The front end of the intermediate platform 61, facing the site P2 for the construction of a new furnace, is extended to the front of the site in which the direction changes.

On the ground from the direction of change of direction towards the site P3 for dismantling the old furnace (see Fig. 3), a branch platform 62 is mounted. A platform 32 is placed on top of the branch platform 62 to move along the branch.

[0112] A sliding support 41 is placed between the upper surface of the foundation bottom 15 and the lower surface of the foundation top 14, as in the first exemplary embodiment, and its fixed side (fixed-side sliding plate 81, illustrated in Fig. 7) is extended to the upper surface platforms 32 for moving along a branch from the upper surface of the foundation bottom 15 through the upper surface of the intermediate platform 61. The height of the sliding surface of the sliding support 41 is adjusted to the same level L1 as in the first example a different embodiment.

[0113] The same sliding support 43, as in the first exemplary embodiment, is mounted between the upper surface of the branch platform 62 and the lower surface of the platform 32 for movement along the branch. The height of the sliding surface 43 is set to level L3 ’, at which the height of the platform 32 for moving along the branch is lower than the level L1 of the sliding support 41.

The sliding support 43 is placed on the lower surface of the recess 33 (see Fig. 8), and its sliding surface is at a level L3 lower than the soil surface in the first exemplary embodiment. However, since the L3 ’level in this exemplary embodiment is adjusted to the upper surface of the branch platform 62 located on the ground, the L3’ level is above the ground. However, this exemplary embodiment is the same as the first exemplary embodiment, in that the level L3 ′ is lower than the height thereto (level L2 in the first exemplary embodiment, and level L1 in this exemplary embodiment), the height of the platform 32 for moving along the branch used at the point of change of direction.

[0114] Next, a thrust transport device 39B (see Figures 30 and 31) used in the thrust step S6 of the new furnace will be described.

In the above-described first exemplary embodiment, the transport device 39 for sliding (see Fig. 21) is equipped with a sliding support 44, which allows the sliding movement of the sliding platform 38 side of the lower surface to perform the first transportation operation, and sliding supports 45 and 46, which provide sliding the movement of the new foundation 23 relative to the upper surface of the slide platform 38 and the upper surface of the reconstruction foundation 26 to perform the second transportation .

[0115] In contrast, in this exemplary embodiment, the first conveying operation is omitted in which the sliding platform 38 is horizontally moved and a second conveying operation is performed in which the new foundation 23 and the new blast furnace 20 are horizontally moved directly from the top of the frame mounted on site P2 for the construction of a new furnace, and transported to the upper surface of the reconstruction foundation 26 in a single operation.

Therefore, the thrust transport device 39B in this exemplary embodiment includes the following configurations distinguishing it from the first exemplary embodiment described above.

[0116] As illustrated in Figures 30 and 31, a construction platform 63 is mounted on the ground at a construction site P2 for constructing a new furnace, and a new foundation 23 for constructing a new blast furnace 20 is supported on the upper surface of the construction platform 63. Between the lower surface of the new foundation 23 and a sliding support 45 having a sliding surface height at the level of L4 is mounted by the upper surface of the construction platform 63.

In this exemplary embodiment, an intermediate platform 61 and a branch platform 62 of the take-away transport device 30B (see FIG. 27) used in the lead-out stage S5 of the old furnace and slide bearings 41 and 43 on the left between the construction site P2 for constructing the new furnace and the bottom 15 of the foundation each top surface. After removing each of the sliding supports 41 and 43, the auxiliary platforms 64 and 65 are respectively placed on the intermediate platform 61 and the branch platform 62, so that the heights of the upper surfaces of the beds are the same as the height of the construction platform 63.

[0117] In this exemplary embodiment, a reconstruction foundation 26 is also mounted on the upper surface of the foundation bottom 15, and the height of the upper surface of the reconstruction foundation 26 is the same as the height of the building platform 63. In addition, from the upper surface of the reconstruction foundation 26 on top of the upper surfaces of the auxiliary platforms 65 and 64 lay the fixed side of the sliding support 46. As in the first exemplary embodiment, the sliding support 46 shares the moving side slidingly th support 46 formed on the lower surface of the new foundation 23 (see Fig. 23). The sliding surface of the sliding support 46 is adjusted to the level L4 and connected to the end portion of the fixed side of the sliding support 45 on the upper surface of the construction platform 63 after installation, and its upper surface of the sliding support 46 is subjected to a leveling finish.

[0118] In such an exemplary embodiment, in step S5 of the removal of the old furnace, the foundation top 14 and the old blast furnace 10 are moved from the top of the foundation bottom 15 to the top of the platform 32 to move along the branch using the sliding support 41. Then the platform 32 to move along the branch move to the site P3 for dismantling the old furnace (see Fig. 3) using the sliding support 43.

On the other hand, in the step S6 of sliding the new furnace, after mounting the reconstruction foundation 26, auxiliary platforms 64 and 65, and the sliding support 46, the new foundation 23 and the new blast furnace 20 are transported to the blast furnace installation site P1 as a whole.

[0119] According to the third exemplary embodiment, it is also possible to obtain the same result as in the above-described first exemplary embodiment.

Moreover, the transfer conveyor 30B used in the old furnace discharge step S5 does not need a second transportation operation, as in the old furnace discharge step S5 of the first exemplary embodiment described above, but only two transportation operations from the first transportation operation in the direction of axis A1 at level L1 and the third transportation operation in the direction along axis A2 at level L3 '. Accordingly, operations involving installation and removal of equipment such as a pulling device 70 (see Figures 18 and 19) for movement in each transportation operation can be shortened, and thereby the construction time is further reduced.

In addition, as in the first exemplary embodiment, since there is no need to form a recess 33 in the ground, it is possible to simplify the work in terms of construction techniques.

In addition, since a branching platform 62 and a platform 32 are used in conveying along the A2 axis, it is not necessary to connect and polish multiple intersections between the sliding support 42 and the sliding support 43, as in the second exemplary embodiment.

[0120] On the other hand, in the thrust transport device 39B (see Figures 30 and 31) used in the step S6 of pushing the new furnace, after installing the reconstruction foundation 26, the auxiliary platforms 64 and 65, and the sliding support 46, the new foundation can be moved 23 and the new blast furnace 20 to the installation site P1 of the blast furnace as a whole.

Therefore, in comparison with the situation of performing the first and second transportation operations, as in the first exemplary embodiment or the second exemplary embodiment, it is possible to reduce operations involving installation and removal of equipment related to the actuation of the extraction device 70 (see Figures 18 and 19 ) or the like, and construction time can be further reduced.

In addition, since the new foundation 23 and the new blast furnace 20 are moved to the installation site P1 of the blast furnace as a whole, and are not stopped halfway, transportation stability and accuracy of movement can be improved.

[0121] Fourth Exemplary Embodiment

Figures 32 and 33 illustrate a fourth exemplary embodiment of the invention.

As in the first to third exemplary embodiments described above, this exemplary embodiment represents the repair of a blast furnace in each process described in FIG. 1. However, this exemplary embodiment differs from the above exemplary embodiments from the first to third order of placement on the plane of the mounting platform P1 of the blast furnace, the site P2 for the construction of a new furnace and the site P3 for dismantling the old furnace, and also differs in the configuration of the transport path for removal, used in the step S5 of the removal of the old furnace, and the transport path for the thrust used in step S6 of the thrust of the new furnace.

[0122] In the above exemplary embodiments from first to third, as illustrated in FIG. 2, a site P2 for constructing a new furnace is placed in the direction along the A1 axis relative to the blast furnace installation site P1, and a site P3 for dismantling the old furnace is arranged in the direction along the A2 axis, extending in the intersecting direction from the middle of the path between the blast furnace installation site P1 and the site P2 for the construction of a new furnace.

As illustrated in Figures 32 and 33, in this exemplary embodiment, the pad P2 for constructing a new furnace and the pad P3 for dismantling the old furnace are arranged in reverse order with respect to each other, compared with the configuration described above according to FIG. 2. Therefore, in this exemplary embodiment, the conveyance path 30 ′ for diverting from the blast furnace mounting pad P1 to the P3 dismantling pad is configured linearly, and the thrust conveying path 39 ′ extending from the P2 pad for constructing the new stove to the P1 pad of a blast furnace, laid in an L-shaped configuration, with a branch from half the distance of the transportation path 30 'to lead in the intersecting direction.

[0123] In such an exemplary embodiment, transportation is performed as follows.

In the lead step S5 of the old furnace, as illustrated in FIG. 32, the operating foundation 13 is segmented at the blast furnace installation site P1, and is linearly moved to the P3 platform to dismantle the old furnace along the conveyance path 30 'for removal, together with the top 14 of the foundation and the old blast furnace 10 located on it (body 11 of the old furnace and system of 12 columns of an old furnace).

In the step S6 of sliding the new furnace, as illustrated in FIG. 33, the new blast furnace 20 (housing 21 of the new furnace and the system of 22 columns of the new furnace), mounted on site P2 for the construction of the new furnace, is moved as a unit with the new foundation 23 to the installation site P1 of the blast furnace along the path 39 ’of transportation for sliding. On the transporting path 39 ’for pushing, the new blast furnace 20 is first moved along axis A2, and after changing direction along axis A1.

[0124] It should be noted that the specific mechanism of the transport device on the transport path 30 'for the lead-out and the transport path 39' for the thrust may be the same as the take-away transport devices 30, 30A and 30B and the transport devices 39, 39A and 39B for the thrust in each of the above exemplary embodiments, and the specific mechanism can be appropriately calculated in accordance with the configuration of the above-described first exemplary embodiment (using levels from L1 to L4), the second at a dimensional embodiment (using levels L1, L2 and L4), or a third exemplary embodiment (using levels L1, L3 ’and L4).

According to the fourth exemplary embodiment, it is also possible to obtain the same results as in the above exemplary embodiments from the first to the third. However, the effect of the rectilinear transport path for thrust, as in the respective exemplary embodiments, cannot be obtained.

[0125] Fifth Exemplary Embodiment

Figures 34 and 35 illustrate a fifth exemplary embodiment of the invention.

As in the first to third exemplary embodiments described above, this exemplary embodiment represents the repair of a blast furnace in each process described in FIG. 1. However, this exemplary embodiment differs from the above exemplary embodiments from the first to third order of placement on the plane of the mounting platform P1 of the blast furnace, the site P2 for the construction of a new furnace and the site P3 for dismantling the old furnace, and also differs in the configuration of the transport path for removal, used in the step S5 of the removal of the old furnace, and the transport path for the thrust used in step S6 of the thrust of the new furnace.

[0126] This exemplary embodiment is configured such that each of the transport path 30 ’for retraction and the path 39’ transport for thrust provides for a change of direction in the middle.

As shown in Figures 34 and 35, the transport path 30 ’for the lead is extended from the blast furnace mounting pad P1 along the axis A1, undergoes a change of direction in the middle, and goes upward in the drawings along axis A2. At the end section, there is a site P3 for dismantling the old furnace. The transporting path 39 ’for extension is extended from the blast furnace installation site P1 along the axis A1, undergoes a change in direction at half the distance, and goes down in the drawings along axis A2, and the construction site P2 for the new furnace is located at the end section.

Therefore, this exemplary embodiment is configured so that each of the transport path 30 ′ for retraction and the transport path 39 ′ for thrust undergoes a change of direction in the middle, and the path extended from the blast furnace mounting pad P1 along the axis A1 is shared from the transport path 30 ' for abduction and by means of 39 'transport for thrust.

[0127] Transportation in the fifth exemplary embodiment is as follows.

In the lead step S5 of the old furnace, as illustrated in FIG. 34, the operational foundation 13 is segmented at the blast furnace installation site P1 and is shifted from the blast furnace installation site P1 along the conveying path 30 ′ to completely discharge with the foundation top 14 and the old blast furnace 10 located on it (the old furnace body 11 and the old column system 12 ovens). On the transport path 30 ’for the removal, the movement is first carried out along the axis A1, and after changing the direction, the movement is carried out along the axis A2 towards the site P3 for dismantling the old furnace.

In the step S6 of sliding the new furnace, as illustrated in FIG. 35, the new blast furnace 20 (housing 21 of the new furnace and the system of 22 columns of the new furnace), assembled at site P2 for the construction of a new furnace, is moved together with the new foundation 23 to the installation site P1 of the blast furnace along the transport path 39 ’for the slide. On the transport path 39 ’for thrust, the movement is first carried out along the axis A2 (towards the site P3 for dismantling the old furnace), and after changing the direction, the movement is carried out along the axis A1 towards the mounting platform P1 of the blast furnace.

[0128] It should be noted that a particular transport device mechanism on the transport path 30 'for the lead and the transport path 39' for the thrust can be configured in the same way as the transporting devices 30, 30A and 30B and the transport devices 39, 39A and 39B for pushing in each of the above-described exemplary embodiments, and the particular mechanism may be appropriately designed in accordance with the configuration of the above-described first exemplary embodiment (using equal to L1 to L4), the second exemplary embodiment (using levels L1, L2, and L4), or the third exemplary embodiment (using levels L1, L3 ’and L4).

According to the fifth exemplary embodiment, it is also possible to obtain the same results as in the above exemplary embodiments from the first to the third.

On the other hand, since both of the transport path 30 'for the lead and the transport path 39' for the thrust undergo a change of direction, there is a high degree of freedom with respect to the choice of the installation site from site P2 for the construction of a new furnace and site P3 for dismantling the old furnace, thereby easily applicable for a blast furnace, the peripheral equipment of which is mounted in cramped conditions.

In addition, it is possible to jointly use the transport device in the general use area along the A1 axis on the transport path 30 ’for the lead and the transport path 39’ for the thrust. In addition, when placing sections along the axis A2 in a straight line, it is possible to jointly use a transport device such as a pulling device 70.

[0129] It should be noted that in the discharge transport devices 30, 30A and 30B, and the transport devices 39 and 39B for pushing in the above-described exemplary embodiments from the first to the third, and on the transport path 30 ′ for the lead and the transport path 39 ′ for thrusts in the fourth exemplary embodiment or the fifth exemplary embodiment, when there is a change of direction at half the distance, the angle of change of direction can be 45 degrees, 60 degrees or any other angle without being cut chennym 90 degrees.

In addition, the number of paths along which a change in direction occurs for each transportation route, such as the transport path 30 ′ for the lead and the transport path 39 ′ for the thrust (that is, the number of times the direction changes are performed on each transport path), can be two or more, without limitation at one time.

[0130] Sixth Exemplary Embodiment

Figures 36 and 37 illustrate a sixth exemplary embodiment of the invention.

As in the first to third exemplary embodiments described above, this exemplary embodiment represents the repair of a blast furnace in each process described in FIG. 1. However, this exemplary embodiment differs from the exemplary embodiments described above from the first to third order of placement of a blast furnace on a plane of an installation site P1, a site P2 for constructing a new furnace, and site P3 for dismantling an old furnace, and also differs in configurations of a conveyance path for removal used in the step S5 of the removal of the old furnace, and the transport path for the thrust used in step S6 of the thrust of the new furnace.

[0131] In this exemplary embodiment, the blast furnace mounting pad P1, the P2 pad for constructing a new stove, and the P3 pad for dismantling the old stove are placed in a straight line along axis A1. In particular, the site P2 for the construction of a new furnace and the site P3 for dismantling the old furnace are on opposite sides with respect to the mounting site P1 of the blast furnace.

In this exemplary embodiment, each of the transport path 30 ’for the lead and the transport path 39’ for the thrust are configured in a straight line. The transport path 30 ’for the lead and the path 39’ the transport for thrust are located on opposite sides with the blast furnace mounting pad P1 between them, and are independent from each other without sharing areas.

[0132] Transportation in the sixth exemplary embodiment is as follows.

In the lead step S5 of the old furnace, as illustrated in FIG. 36, the operational foundation 13 is segmented at the installation site P1 of the blast furnace and is linearly shifted to the site P3 for dismantling the old furnace along the transportation path 30 'for removal entirely with the top 14 of the foundation and the old blast furnace 10 placed on it (the old furnace body 11 and system 12 columns of an old furnace).

In the step S6 of sliding the new furnace, as illustrated in FIG. 37, the new blast furnace 20 (housing 21 of the new furnace and the system of 22 columns of the new furnace), assembled at site P2 for the construction of the new furnace, are linearly moved along with the new foundation 23 to the installation site P1 of the blast furnace along the 39 ’conveying path.

[0133] It should be noted that the specific mechanism of the transport device on the transport path 30 'for the lead-out and the transport path 39' for the thrust may be the same as the take-away transport devices 30, 30A and 30B and the transport devices 39, 39A and 39B for the thrust in each of the above exemplary embodiments, and the specific mechanism can be appropriately calculated in accordance with the configuration of the above-described first exemplary embodiment (using levels from L1 to L4), the second at a dimensional embodiment (using levels L1, L2 and L4), or a third exemplary embodiment (using levels L1, L3 ’and L4).

However, in this exemplary embodiment, the transport path 30 ’for retraction and the path 39’ transport for thrust are located on the same line and are not dependent on each other. Thus, in this exemplary embodiment, features (levels L3 and L3 ’) for changing direction, as in the exemplary embodiments described above, can be omitted.

According to the sixth exemplary embodiment, it is also possible to obtain the same results as in the above exemplary embodiments from the first to the third.

[0134] Seventh Exemplary Embodiment

Figures 38 and 39 illustrate a seventh exemplary embodiment of the invention.

As in the first to third exemplary embodiments described above, this exemplary embodiment represents the repair of a blast furnace in each process described in FIG. 1. However, this exemplary embodiment differs from the exemplary embodiments described above from the first to third order of placement of a blast furnace on a plane of an installation site P1, a site P2 for constructing a new furnace, and site P3 for dismantling an old furnace, and also differs in configurations of a conveyance path for removal used in the step S5 of the removal of the old furnace, and the transport path for the thrust used in step S6 of the thrust of the new furnace.

[0135] In this exemplary embodiment, as in the sixth exemplary embodiment described above, each of the transport path 30 ’for the lead and the transport path 39’ for the thrust are configured in a straight line.

However, the transport path 30 ’for abduction is extended along the A1 axis, while the transport path 39’ for thrust is laid along axis A3 (diagonal direction relative to the rectangular operational foundation 13), which is 45 degrees with the axis A1.

[0136] In such an exemplary embodiment, it is possible to transport the old blast furnace 10 and the new blast furnace 20 according to the same procedure as in the sixth exemplary embodiment described above.

According to this exemplary embodiment, it is possible to obtain the same result as in the sixth exemplary embodiment described above. Moreover, when placing the transport path 39 ’for the advance along the axis A3, which forms an angle of 45 degrees with the axis A1, the site P2 for the construction of a new furnace can be arranged in a different position than in the sixth exemplary embodiment described above.

More specifically, even when the placement, as in the sixth exemplary embodiment described above, cannot be performed due to the location of the peripheral equipment of the blast furnace or the like, that is, when it is not possible to place the mounting pad P1 of the blast furnace, the pad P2 for constructing a new stove and the pad P3 for dismantling the old furnace in a straight line along the A1 axis, sites can be placed with changing the position of site P2 for the construction of a new furnace. In addition, the transport path 39 'for the thrust can be oriented diagonally (with the A3 axis at an angle of 30 degrees, 60 degrees, 120 degrees, 135 degrees or the like with respect to the axis A1) towards the place where the construction site P2 can be defined new stove.

[0137] Modification (s)

The invention is not limited to the exemplary embodiments described above, and modifications or the like are included in the invention within the scope of achieving the object of the invention.

The existing blast furnace foundation construction, such as a reinforced concrete structure, built on the ground of the blast furnace installation site P1, corresponds to the operational foundation 13.

Although such an operational foundation 13 is segmented to the top 14 of the foundation and the bottom 15 of the foundation in the foundation segmenting step S3, it is desirable to choose the position of its segmentation taking into account the internal structure of reinforced concrete in the operational foundation 13 or the like.

[0138] As a new foundation 23, a slab-like foundation structure may be used, and a structure from a set of shafts in a steel frame or a structure partially filled with a refractory aggregate, such as a fluid flowing heat-resistant material, may be used.

A new foundation 23 is pushed onto the blast furnace installation site P1 to form the foundation of the new blast furnace 20, and peripheral equipment and piping and electrical wiring, such as cooling pipelines necessary for the operation of the blast furnace, can be mounted in advance.

Equipment for the new foundation 23 may be mounted prior to the construction of the housing 21 of the new furnace and the column system 22 of the new furnace on the upper surface of the new foundation 23, or may be installed at the same time.

[0139] It is only necessary that the discharge platform 31, the ramp platform 32, the intermediate platform 61, the branch platform 62 and the construction platform 63 in each exemplary embodiment be able to withstand the loads of the foundation peaks 14 and the old blast furnace 10 resting on the top surface, or a new foundation 23 and a new blast furnace 20, and with the possible use of a structure from a set of shafts in a steel frame.

Here, in the step S6 of pushing the new furnace, when the new blast furnace 20 and the new foundation 23 are transported, it is necessary to minimize deformation of the housing 21 of the new furnace and the column system 22 of the new furnace after the construction is completed. Therefore, in transport devices 39 and 39B for thrust related to transporting the housing 21 of a new furnace or the like, it is desirable to provide sufficient rigidity.

On the other hand, in the step S5 of discharging the old furnace, since the old blast furnace 10 and the top of the foundation 14 are still taken apart afterwards, the discharge transport devices 30, 30A and 30B do not need as high accuracy as in the case of transport devices 39 and 39B for advancement.

[0140] In the sliding supports 41-46, which are used in the outgoing transport devices 30, 30A and 30B and in the transport devices 39 and 39B for pushing, for the fixed-side sliding plate 81 and the moving-side sliding plate 82 described above in FIG. 7, it is only necessary that the fixed-side sliding plate 81 be a plate-shaped element continuous in the conveying direction, but the moving-side sliding plate 82 can be intermittently placed without limitation in terms of continuity in the direction of movement. In addition, its details can be appropriately changed to the extent that the expected sliding characteristics can be obtained, for example, by arranging numerous disk-shaped support plates.

In order to reduce friction with respect to the fixed-side sliding plate 81, the moving-side sliding plate 82 is equipped with an anti-friction cladding 83. However, an anti-friction cladding 83 may also be provided on the fixed-side sliding plate 81. In another situation, the anti-friction liner 83 may be absent, the fixed-side sliding plate 81 and the moving-side sliding plate 82 are in direct sliding contact with each other, and a lubricant having high lubricity under high load can be placed between the two plates.

[0141] As an anti-friction cladding 83, a cladding may be used in which the solid lubricant itself has a leaf-like or film shape, without being limited to the cladding obtained, for example, by firmly adhering a solid lubricant (eg, fine powders such as polytetrafluoroethylene resin ( PTFE), molybdenum disulfide and graphite) on the surface of the substrate. In addition, the anti-friction liner 83 can be dispensed with and the solid lubricant can be dispersed in a viscous medium and can be applied between the fixed-side sliding plate 81 and the moving-side sliding plate 82 in the form of a grease.

[0142] A guide structure 50 is provided on each of the discharge transport devices 30, 30A and 30B and the slide transport devices 39 and 39B in order to improve the accuracy of the conveyor axis. However, although such high accuracy is essential in thrust transport devices 39 and 39B, high accuracy is not required in outgoing transport devices 30, 30A, and 30B. However, to perform reliable transportation, it is desirable to add a structure to prevent deviating movement, and a structure such as those described in Patent Document 1 described above can be appropriately adapted.

[0143] In each of the exemplary embodiments, each of the discharge transport devices 30, 30A and 30B and the transport devices 39, 39A and 39B for slide are provided, and height levels from L1 to L4 are adjusted in each device. More specifically, the first exemplary embodiment (using levels L1 to L4), the second exemplary embodiment (using levels L1, L2 and L4), and the third exemplary embodiment (using levels L1, L3 'and L4) are defined, and the same elevation levels L1 to L4 are also used on the transport path 30 ′ for retraction and the transport path 39 ′ for thrust in exemplary fifth through seventh embodiments.

The specific values of the height levels L1 to L4 can be appropriately adjusted during the commissioning process. In addition, it is also possible to add other levels depending on the intersection of transportation routes or the like.

[0144] However, it is desirable to adjust the level L4 (the level at which the reconstruction foundation 26 is installed on the upper surface of the smooth bottom 15 of the foundation) each time relative to the base level L1 (the level at which the operational foundation 13 is cut horizontally and segmented to the top 14 of the foundation and bottom 15 of the foundation), that is, the formation of a new reconstruction foundation 26 with alignment of the upper surface of the bottom 15 of the foundation. With such a reconstruction foundation 26, a new blast furnace 20 can be slid without interference.

In addition, when the slide transport path 39 ’is adjusted to the L4 level in the fourth and fifth exemplary embodiments described above, a configuration as illustrated in FIG. 40.

[0145] As shown in FIG. 40, the ramp platform 32 is supported through the sliding support 43. Like the structure of FIG. 12, the soil that supports the sliding support 43 is reinforced with reinforcing steel material 34. A sliding platform 38 is supported on the upper surface of the platform 32 to move along the branch via the sliding support 42. A new foundation 23 is formed on the upper surface of the sliding platform 38 through the sliding support 45, and On the new foundation 23, a new blast furnace 20 was formed, including a housing 21 of the new furnace and a system of 22 columns of the new furnace.

Here, the sliding surface (sliding bearing 43) of the platform 32 for moving along the branch can be brought to level L3, the sliding surface (sliding bearing 42) of the sliding platform 38 can be adjusted to level L2, and the sliding surface (sliding bearing 45) of the new foundation 23 can be set to level L4.

INDUSTRIAL APPLICABILITY

[0146] The invention is applicable as a method for reconstructing a blast furnace in which the removal of the old furnace and the column system of the old furnace and the construction of the new furnace and column system of the new furnace are performed in a short period of time.

EXPLANATION OF CODE (S) POSITION NUMBER (s)

[0147] 10 ... Old blast furnace

11 ... Housing of the old furnace

12 ... The column system of the old furnace

13 ... Operational foundation

14 ... Top of the foundation

15 ... The bottom of the foundation

20 ... New blast furnace

21 ... Housing of the new furnace

22 ... The column system of the new furnace

23 ... New foundation

26 ... Reconstruction foundation

30, 30A, 30V ... Outgoing transport device

30 ’... Transportation path for abduction

31 ... diversion platform

32 ... Platform for moving along a branch

33 ... excavation

34 ... Reinforcing steel material

35 ... Support element

38 ... mobile platform

39, 39B ... Slider

39 ’... Transport Way for Thrust

41, 42, 43, 44, 45, 46 ... Sliding support

50 ... Guide design

51 ... Guide recess

52 ... Guide block

61 ... Intermediate platform

62 ... Branch Platform

63 ... Construction platform

64, 65 ... Supporting platform

70 ... Pulling device

71 ... hydraulic cylinder with central bore

72 ... Cable

73 ... The emphasis of reaction force

81 ... Fixed plate sliding plate

82 ... Sliding plate of the movable side

83 ... antifriction lining

84 ... Retaining pillow

85 ... pad retaining pad

86 ... Base mortar

91 ... Through hole

92 ... Guide element

93 ... wire saw

94 ... Cavity

95 ... Highly loaded anchor

96 ... Beam

A1, A2 ... Axis

B1 ... Edge

L1, L2, L3, L4 ... Level

P1 ... Blast furnace mounting pad

P2 ... Site for the construction of a new furnace

P3 ... Site for dismantling the old furnace

S1 ... Operation of an old blast furnace

S2 ... Stage of construction of a new furnace

S3 ... Stage of foundation segmentation

S4 ... Stop

S5 ... Stage of removal of the old furnace

S6 ... Stage of pushing a new furnace

S7 ... Operation of a new blast furnace

S8 ... The stage of dismantling the old furnace

T1, T2, T3 ... slotted compartment

Claims (74)

1. The method of reconstruction of a blast furnace, which has a furnace body and a system of columns of the furnace mounted on a production foundation, and the method includes: the stage of construction of a new furnace, in which a new foundation is built and a system of columns of a new furnace is built and a housing of a new furnace is built on a new foundation at a site for the construction of a new furnace different from the operational foundation; the foundation segmentation stage, in which the horizontal operating foundation is cut to segment the operational foundation on the top of the foundation, on which the old furnace body and the column system of the old furnace are mounted, and the base of the foundation, and the construction stage of the new furnace and the foundation segmentation stage are performed at a time the blast furnace is in operational condition; blast furnace blowing; the stage of removal of the old furnace, in which the top of the foundation is removed from the top of the bottom of the foundation together with the body of the old furnace and the column system of the old furnace; and the stage of pushing the new furnace, in which the new foundation is pushed onto the bottom of the foundation together with the column system of the new furnace and the housing of the new furnace. 2. The method according to claim 1, in which, at the stage of pushing a new furnace, a reconstruction foundation is formed on the upper surface of said foundation bottom and a new foundation is pushed onto the upper surface of the reconstruction foundation together with the column system of the new furnace and the new furnace body. 3. The method according to claim 2, in which, at the stage of constructing a new furnace, a transport device for thrusting is used, extending rectilinearly from the site for constructing a new furnace to said operational foundation, at the stage of removal of the old furnace, a discharge transport device is used, which is extended from the operational foundation towards the site where the stage of construction of the new furnace is performed, and extended from the position of changing direction in the intersecting direction, and each of the transport device for pushing and the transporting device includes a sliding support using anti-friction linings with solid lubricant between a pair of slide plates. 4. The method according to claim 3, in which the discharge transport device has the first movement path, passing from the operational foundation to the side of the site where the construction stage of the new furnace is carried out a second travel path extended in an intersecting direction from half the distance of the first travel path, a discharge platform that can move along the first path of movement, a ramp platform that can move along a second path, and a recess, which is formed in the ground along the second travel path and encloses the platform for moving along the branch, the first travel path includes a sliding support, which extends from the upper surface of the discharge platform to the upper surface of the bottom of the foundation and includes a sliding surface having a height adjusted to level L1, a sliding support that is formed between the lower surface of the discharge platform and the ground and includes a sliding surface having a height adjusted to level L2, and a sliding support, which is formed on the upper surface of the platform to move along the branch and includes a sliding surface having a height adjusted to level L2, and the second travel path includes a sliding support, which is formed between the lower surface of the platform for movement along the branch and the bottom surface of the recess and includes a sliding surface having a height adjusted to level L3, slide transport device includes the third path of movement, extended from the new foundation towards the operational foundation, a sliding platform that can move along the third path of travel and supports the new foundation, and a support element located in the recess at half the distance of the third movement path, the third travel path includes a sliding support, which is formed between the lower surface of the slide platform and the ground, continues to a place near the bottom of the foundation through the upper surface of the support element and includes a sliding surface having a height adjusted to level L2, a sliding support that is formed between the upper surface of the slide platform and the lower surface of the new foundation and includes a sliding surface having a height adjusted to level L4, and a sliding support, which is formed between the upper surface of the reconstruction foundation and the lower surface of the new foundation and includes a sliding surface having a height adjusted to level L4, while the heights of the sliding surfaces of said sliding bearings are related as level L4> level L1> level L2> level L3. 5. The method according to claim 3, in which the discharge transport device includes the first movement path, passing from the operational foundation to the side of the site where the construction stage of the new furnace is carried out a second travel path extending in an intersecting direction from half the distance of the first travel path, and a discharge platform that can move from the first travel path to the second travel path, wherein the first travel path includes a sliding support, which extends from the upper surface of the discharge platform to the upper surface of the bottom of the foundation and includes a sliding surface having a height adjusted to level L1, and a sliding support that is formed between the lower surface of the discharge platform and the ground and includes a sliding surface having a height adjusted to level L2, and the second travel path includes the sliding support, which is formed between the lower surface of the discharge platform and the ground, continues with the sliding support of the level L2 in the first travel path in the intersecting direction and includes a sliding surface having a height adjusted to the level L2, slide transport device includes a third travel path extending from the new foundation towards the operational foundation, and a sliding platform that can move along the third path of movement and supports a new foundation, and the third travel path includes a sliding support, which is formed between the lower surface of the slide platform and the ground, continues to a place near the bottom of the foundation and includes a sliding surface having a height adjusted to level L2, a sliding support that is formed between the upper surface of the slide platform and the lower surface of the new foundation and includes a sliding surface having a height adjusted to level L4, and a sliding support, which is formed between the upper surface of the reconstruction foundation and the lower surface of the new foundation and includes a sliding surface having a height adjusted to level L4, while the heights of the sliding surfaces of said sliding bearings are related as level L4> level L1> level L2. 6. The method according to claim 3, in which the discharge transport device has the first movement path, passing from the operational foundation to the side of the site where the construction stage of the new furnace is carried out a second travel path passing in an intersecting direction from half the distance of the first travel path, a branch platform mounted on the ground along the second travel path, a ramp platform that can move along a branch platform, and an intermediate platform that is connected to the operational foundation and branching platform along the first path of movement, while the first travel path includes a sliding support, which extends from the upper surface of the platform to move along a branch to the upper surface of the bottom of the foundation through the upper surface of the intermediate platform and includes a sliding surface having a height adjusted to level L1, while the second travel path includes a sliding support that is formed between the lower surface of the platform for movement along the branch and the upper surface of the branch platform and includes a sliding surface having a height adjusted to level L3 ’, slide transport device includes a third movement path extending from the new foundation towards the operational foundation, a construction platform that supports the new foundation, and an auxiliary platform that is mounted on a branching platform and an intermediate platform at half the distance of the third movement path, while the third travel path includes the sliding support, which is formed between the lower surface of the new foundation and the upper surface of the construction platform, continues to the upper surface of the reconstruction foundation through the upper surface of the auxiliary platform and includes a sliding surface having a height adjusted to level L4, and the heights of the sliding surfaces of said sliding bearings are correlated as level L4> level L1> level L3 ’. 7. The method according to p. 3 or 6, in which the transport device for thrust includes a guide recess that continues in the direction of movement on the fixed side of the sliding support; and a guide unit mated to a guide recess on the moving side, the guide unit being mounted in two front and rear positions in the direction of movement of the moving side. 8. The method according to any one of paragraphs. 3-6, in which the transport device for thrust provides accuracy with a horizontal error of 3 mm or less on 1 m of travel.

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