JP4300249B2 - Method of dismantling the bottom of the blast furnace furnace - Google Patents

Description

  The present invention relates to a method for disassembling a blast furnace bottom for dismantling the bottom of a furnace in a short time in blast furnace renovation.

  Conventionally, when dismantling the blast furnace bottom and carrying it out of the system in blast furnace refurbishment, the dismantling work is performed after discharging hot metal, slag, and the like remaining at the bottom of the blast furnace as much as possible. In such dismantling work, several methods for shortening the dismantling work period have been proposed so far (for example, see Patent Documents 1 and 2).

  In Patent Document 1, after blowing off the blast furnace, the solidified body layer and the bottom brick layer remaining on the bottom of the furnace are taken out of the furnace and removed, and the furnace body of the blast furnace is positioned higher than the solidified layer. The furnace body above the cutting position is suspended from the blast furnace furnace with a jack or the like and fixed, and then the furnace core below the cutting position is removed over the entire circumference of the furnace body. A method for dismantling the bottom of the blast furnace furnace is disclosed, in which the solidified layer and the brick at the bottom of the furnace are integrally drawn out of the furnace.

  According to this dismantling method, the demolition work period can be shortened compared with the conventional method in which the residue and carbon bricks are divided by blasting and carried out of the furnace, but this dismantling method is performed at the bottom of the blast furnace furnace before blowing. In this dismantling method, a temporary opening is provided, the hot metal and slag remaining in the hearth are discharged from the opening, and then the residue and the furnace body are cooled by pouring water from the upper part of the furnace body. Therefore, the amount of work for unloading the iron skin around the entire circumference of the furnace body, the in-furnace solidified material layer, and the furnace bottom brick as one body is extremely large, and the overall dismantling period is not necessarily shortened.

  Also, in the above dismantling method, the iron core at the bottom of the blast furnace furnace (furnace iron core below the cutting position of the furnace body) and the furnace bottom plate are cut and separated. Or, it cannot be supported by pushing it up with a jack, and therefore, it is not possible to arrange a drawer rail, roller member, etc. under the cut bottom furnace brick, and the blast furnace bottom can be pulled out. There is a problem of becoming unstable.

  In consideration of the above problems, the present applicant, in Patent Document 2, divided into a plurality of cutting sections in advance into the basic concrete below the floor beam provided in the lower part of the blast furnace body during operation before blast furnace blowing. Set the horizontal cutting section and maintain the blast furnace main body in an upright state, cut each cutting section with a wire saw, and (i) secure the peelability to the part cut with the wire saw. The horizontal cutting part is sequentially cut with a wire saw while supporting the load of the blast furnace body with filling and hardening grout material, or (ii) filling with sand or iron particles and supporting the load of the blast furnace body. We proposed a method for dismantling the bottom of the blast furnace.

  According to this dismantling method, the bottom of the blast furnace consisting of a joint beam and a bottom mantle that are integrally coupled is lifted with a jack or the like, separated from the basic concrete, and a lateral movement means is disposed in the separation space to provide a blast furnace The bottom of the furnace is loaded on the lateral movement means, and then moved laterally and carried out. Therefore, regardless of the solidification state and amount of the residue solidified inside the blast furnace bottom, the blast furnace bottom can be dismantled and carried out in a unified work procedure while containing the solidified residue. The dismantling period can be greatly shortened.

  In the dismantling method, rail members, carriages, rollers, pneumatic levitation devices, etc. are disclosed as the lateral movement means for carrying out the bottom of the blast furnace furnace. However, these lateral movement means are disclosed in the separation space. In order to arrange them, it is necessary to secure a separation space having a height corresponding to “the bending of the blast furnace furnace + the height of the lateral movement means + the allowance (such as a work space for taking in the lateral movement means)”.

  That is, the dismantling method increases the work load such as jacking up of the bottom of the furnace and mounting the bracket for jacking up in order to secure a separation space in consideration of the “bending of the blast furnace furnace”. I have a problem.

  Therefore, in view of the above problems, the present applicant minimizes the separation space in which the lateral movement means for carrying out the furnace bottom portion is inserted and arranged in Patent Document 3, and does not perform jack-up work. A blast furnace body removal method that can shorten the work period was proposed.

  Moreover, in patent document 4, in the blast furnace body, the upper part of the range to be removed is cut off, and the underlying concrete or the base grout below the range to be removed is cut with a wire saw, and is integrally formed with a floor beam and a furnace bottom mantel. A blast furnace where the furnace body is raised and a “sliding member” is arranged as a lateral movement means for carrying out the bottom of the furnace, and the furnace body is lowered onto the lateral movement means and moved laterally to move outside the furnace body. Disclosed how to remove the body.

However, when dismantling and removing a large blast furnace, for example, a large blast furnace of 5000 to 6000 m ³ , according to the conventional method, approximately 4000 t or more of residues must be removed from the bottom of the furnace. Inevitably longer. In addition, when the above removal method is applied, the amount of bending of the blast furnace furnace body is large, so there is a limit to minimizing the separation space for placing the lateral movement means for carrying out the bottom of the furnace, reducing the load of jack-up work. Without dismantling, the dismantling period will be prolonged.

  Furthermore, when the above removal method is applied to the dismantling and removal of a large blast furnace, equipment and facilities of a required scale are required to lift the furnace bottom of about 4000 t or more, and it is necessary to carry out the blast furnace bottom. Requires lateral movement means of strength and scale.

  Thus, when a large blast furnace is dismantled, the equipment and facilities required for the dismantling work are necessarily increased in size and the dismantling method is complicated, and the dismantling work period is prolonged. That is, in dismantling and removing large blast furnaces, there is currently no suitable dismantling method that can dismantle and remove the furnace body in a short period of time.

JP-A-10-96005 Japanese Patent No. 3684201 Japanese Patent Application No. 2004-379284 Japanese Patent Application No. 2005-108780

  An object of the present invention is to provide a universal dismantling method that can dismantle a blast furnace in a shorter period of time, including a large blast furnace, in view of the above-described present state of blast furnace dismantling technology.

  The present inventor lifts the blast furnace bottom or pushes it up with a jack in order to arrange the lateral movement means at the bottom of the blast furnace bottom, resulting in a complicated disassembly procedure and a long dismantling period. In view of this, the demolition technique that can arrange the lateral movement means on the foundation concrete or base grout at the bottom of the blast furnace bottom without suspending the blast furnace bottom or pushing it up with a jack has been intensively studied.

  As a result, the basic concrete or base grout at the bottom of the furnace bottom is cut horizontally with a wire saw to form a gap of the required height, and if the lateral movement means is placed directly in the gap, the bottom of the blast furnace bottom It was found that large-scale equipment and facilities required for lifting and jacking up are not required, the preparation for unloading is simplified, and the dismantling period of the bottom of the blast furnace furnace can be greatly shortened.

The present invention relates to a method of dismantling a blast furnace bottom part by separating and carrying out the blast furnace bottom part from basic concrete or a base grout located below the blast furnace bottom part, the blast furnace bottom part comprising a floor plate and a sliding plate. The following steps 1 to 7 are carried out in advance during the operation of the blast furnace using a lateral movement means comprising a lateral movement member for carrying out and a furnace body load support member for supporting the furnace body load. The following step 8 is carried out during the repair period after the blast furnace is blown off.
Step 1: A plurality of cutting sections parallel to the drawing direction of the blast furnace bottom are set in the horizontal cutting part set in the basic concrete or base grout located below the bottom of the blast furnace to be carried out.
Step 2: Drill adjacent horizontal holes parallel to the pull-out direction in the foundation concrete or base grout at the boundary of the cutting section.
Step 3: A wire saw wire is inserted into the adjacent horizontal hole, and the basic concrete of the cutting section is cut along an upper horizontal plane and a lower horizontal plane that maintain a required height.
Step 4: discharging the cut basic concrete or base grout between the upper horizontal plane and the lower horizontal plane to form a void parallel to the drawing direction.
Step 5: The laterally moving member is disposed in the gap with the sliding plate facing up.
Step 6: The furnace body load support member is provided in a gap between the upper surface of the sliding plate and the upper horizontal surface.
Step 7: Steps 2 to 6 or Steps 3 to 6 are repeated, and the lateral movement means is arranged over the entire horizontal cutting portion set in the foundation concrete or base grout.
Step 8: After separating the upper mantel from the bottom of the furnace, it is lifted, a horizontal force is applied to the bottom of the furnace, the sliding plate and the sliding plate are slid, and the blast furnace bottom to the sliding plate are carried out of the system. To do.

  According to the present invention, since all the lateral movement means for laterally moving the furnace bottom can be attached during the operation before the blast furnace blowing, it is performed after the blowing that is disclosed in the patent document. The number of installation days of the lateral movement means can be shortened.

  That is, during operation of the blast furnace, a gap is formed in the basic concrete or base grout at the bottom of the blast furnace furnace so that a lateral movement means including a lateral movement member and a furnace body load support member can be arranged, and the lateral gap is formed in the gap. The moving means is taken in and the load at the top of the cutting is supported by the lateral moving means, and this can be quickly and reliably prepared and completed over the entire horizontal cutting part at the bottom of the blast furnace furnace. The number of work days required can be reduced.

  Further, according to the present invention, there is no need for a large-scale apparatus / equipment for lifting or jacking up the bottom of the blast furnace furnace, which is a heavy object, and the lateral movement means including the lateral movement member and the furnace body load support member is provided. Since it suffices to arrange it in the gap, the number of work days until completion of unloading preparation, that is, the number of work days required for preliminary construction can be greatly reduced.

Furthermore, according to the present invention, since there is no need to lift the blast furnace bottom, which is a heavy object, a blast furnace bottom where a rigid member such as a spread beam is not laid on the furnace bottom (since there is no rigid member, lifting or jacking The bottom of the blast furnace furnace with a large amount of residue remaining can be easily carried out.
As a result, according to the present invention, the dismantling period of the blast furnace furnace body can be greatly shortened.

  In the present invention, after arranging a wire guide member for maintaining the wire level of the wire saw constant in the horizontal hole, the wire saw wire is inserted into the horizontal hole along the guide member, and the basis of the cutting section It is desirable to cut the concrete or base grout along the upper and lower horizontal planes that maintain the required height.

In the present invention, it is desirable that a lateral movement guide member for preventing a side slip in the index direction during lateral movement is disposed in all or part of the horizontal hole.
When the wire guide member is disposed in the horizontal hole, it is desirable to install the lateral movement guide member after discharging the wire guide member in the horizontal hole.

  In the present invention, it is desirable that the wire guide member is a long steel material provided with a tip in a loading direction into a horizontal hole and a roller at the tip and the center.

  In the present invention, the diameter of the horizontal hole is preferably 60 to 200 mm.

  In the present invention, it is preferable that an interval between adjacent horizontal holes is 0.45 to 5 m.

  In the present invention, it is desirable that the furnace body load supporting member is composed of one kind or a combination of two or more kinds of garnet, spherical particles having a small particle diameter, and mortar.

  In the present invention, it is preferable that the laterally moving member is composed of a floor plate, a sliding plate, and a lubricant filled between the floor plate and the sliding plate.

  In the present invention, the total number of the floor plate and the sliding plate is preferably 2 or more.

  In the present invention, it is desirable to supply a lubricant from outside the system to the sliding surface between the floor plate and the sliding plate.

  In the present invention, the furnace body load supporting member is composed of one or a combination of two or more of garnet, small spherical particles and mortar, and a high pack anchor (HPA). desirable.

  In the present invention, it is desirable that the spherical particles having a small particle diameter are spherical or elliptical iron balls having a maximum diameter of 10 mm or less.

  In the present invention, when the steps 2 to 6 or the steps 3 to 6 are repeatedly performed, it is desirable to appropriately select a non-adjacent cutting section and continuously perform the steps.

The present invention will be described with reference to the drawings.
FIG. 1 shows one embodiment of a blast furnace and a furnace body to which the present invention is applied. The blast furnace 10 is configured by standing a blast furnace body 13 on a floor beam 12 laid on a foundation concrete 11.

A plurality of exhaust pipes 15 are provided in the upper part of the blast furnace 10, and the blast furnace 10 and the exhaust pipe 15 are supported by a furnace body 14 including support columns 22 erected at four locations around the blast furnace 10.
An annular pipe 16 surrounding the blast furnace 10 is held at the lower part of the furnace body rod 14, a furnace top outrigger crane 17 for conveying the charging device 19 is provided at the upper end part, and a furnace is provided at the intermediate part. A temporary extension deck 18 is provided for performing maintenance inspection and dismantling work on the top facility.

A beam or a temporary jack receiving beam 21 to which a center hole jack 50 capable of supporting the blast furnace main body 13 can be attached is disposed at any level of the furnace body rod capable of supporting the blast furnace.
The outer side of the blast furnace body 13 is covered with an iron skin 29, and a large number of stave coolers 30 are arranged on the inner side.

After the blast furnace 10 is blown off, an unmelted coke layer and molten iron or slag are solidified into a solid kneaded mass 32 inside the bottom brick layer 31 inside the lower portion of the blast furnace main body 13. A residue 33 that has been cooled and solidified remains below the lump 32.
The blast furnace body 13 is composed of an upper mantel 34 on the upper side and a lower mantle 35 on the lower side (containing residual bricks and residue 33).
In the present invention, the bottom beam 36 and the furnace bottom mantel 35 which are integrally joined are used as the furnace bottom part 36.

FIG. 2A shows a cross-sectional structure of the furnace bottom 36, and FIG. 2B shows an enlarged state of the 2B portion.
The floor beam 12 on the foundation concrete 11 is composed of a large number of H-shaped steels 23 arranged side by side and a furnace bottom plate 26 disposed on the top thereof.
A cooling pipe 24 is disposed between adjacent H-section steels 23, and a grout material 25 or a stamp material 28 is injected and solidified below the cooling pipe 24, respectively.

Hereinafter, the procedure of the blast furnace bottom dismantling method (the present invention method) according to the present invention will be described.
The present invention basically uses a lateral movement means including a lateral movement member for carrying out the blast furnace furnace bottom and a furnace body load support member for supporting the furnace body load. Use a sliding plate. And the following process 1-process 7 are implemented during operation of a blast furnace beforehand, and then process 8 is implemented during the repair period after the blast furnace is blown off.

Step 1: A plurality of cutting sections parallel to the drawing direction of the bottom of the furnace bottom are set in the horizontal cutting part set in the basic concrete or base grout located below the bottom of the blast furnace furnace to be carried out.
Step 2: A horizontal hole parallel to the drawing direction is drilled in the basic concrete or base grout at the boundary of the cutting section.
Step 3: Insert a wire saw wire into the adjacent horizontal holes, and place the basic concrete of the cutting section into an upper horizontal plane and a lower horizontal plane that maintain the required height (the height required for the arrangement of the lateral movement means). Cut along.
Step 4: discharging the cut basic concrete or base grout between the upper horizontal plane and the lower horizontal plane to form a void parallel to the drawing direction.

Step 5: The laterally moving member is disposed in the gap with the sliding plate facing up.
Step 6: The furnace body load support member is disposed in a gap between the upper surface of the sliding plate and the upper horizontal surface.
Step 7: Steps 2 to 6 or Steps 3 to 6 are repeated, and the lateral movement means is arranged over the entire horizontal cutting portion set in the foundation concrete or base grout.
Step 8: After separating the upper mantel from the bottom of the furnace, lifting, applying a horizontal force to the bottom of the furnace, sliding the floor plate and the sliding plate, from the blast furnace bottom to the sliding plate (the blast furnace bottom, The furnace body load support member and the sliding plate are carried out of the system.

  Hereinafter, the above-described steps 1 to 4 will be referred to as a furnace bottom portion separation step, and steps 5 to 8 will be referred to as a furnace bottom portion unloading step.

(Furnace bottom cutting process)
In FIG. 2B, a horizontal cutting portion 49 is set in advance in the foundation concrete 11 below the floor beam 12 of the furnace bottom portion 36, and then a plurality of cutting portions 49 are parallel to the drawing direction of the furnace bottom portion 36. A cutting section is set (step 1).
FIG. 3 shows one mode of the set cutting section.

  In FIG. 3, in the horizontal cutting part 49 provided in the foundation concrete 11, ten cutting sections 68a-68j (foundation concrete 11 (or base grout)) parallel to the direction (left-right direction) which moves a furnace bottom part horizontally are made into the wire saw 70. (Range to be cut by the wires 70a to 70j).

  The width of the cutting section is appropriately set in consideration of the size and weight of the furnace bottom. 450-5000 mm is preferable. Note that the width of the cutting section need not be constant, and may be set as appropriate in consideration of the weight distribution of the furnace bottom.

  Using a punching machine (not shown), the cutting section 68a and the end boundary 69a, the cutting sections 68a to 68j, the boundary sections 69b to 69j, and the cutting section 68j and the end boundary 69k have a predetermined diameter. A horizontal hole is drilled (step 2). The diameter of the horizontal hole is set as appropriate in consideration of the ease of the subsequent cutting operation with a wire saw and securing a height sufficient to insert and arrange the lateral movement means in the gap formed by this cutting. However, 60-200 mm is preferable.

  If the diameter of the horizontal hole is less than 60 mm, it is difficult to insert the two upper and lower wire saws 70, and even if they can be inserted, the upper and lower two surfaces cannot be cut horizontally. Moreover, when the diameter exceeds 200 mm, it is difficult to drill a horizontal hole of a long distance (for example, about 20 m), and it takes a lot of time for the drilling work with a drilling machine, and it is functionally horizontal. There is no point in increasing the diameter of the hole.

  The interval between adjacent horizontal holes is appropriately set in consideration of the size and weight of the furnace bottom, the area of the foundation concrete, and the like, but is preferably 0.45 to 5 m. If the distance between adjacent horizontal holes is less than 0.45 m, the resistance at the folded portion when the wire saw 70 rotates is large, and the foundation concrete cannot be cut. If the distance between adjacent horizontal holes exceeds 5 m, It becomes difficult to cut the foundation concrete horizontally.

  Even if it can be cut, the unevenness of the cut surface becomes an obstacle, the friction at the time of drawing increases, it becomes difficult to discharge the cut basic concrete out of the system, and the bottom of the blast furnace is moved laterally In this case, the frictional resistance also increases, and it becomes extremely difficult to carry out the bottom of the blast furnace furnace. For example, in the case of a furnace bottom having a weight exceeding 4000 t, it cannot be carried out.

  In addition, the adjacent space | interval of a horizontal hole does not need to be constant. The dimensions may be appropriately changed in consideration of the size of the bottom of the blast furnace furnace and the area of the basic concrete (or base grout).

  The wires 70a to 70j of the wire saw 70 are inserted into the horizontal holes drilled in the respective boundary portions, and the basic concrete remaining in the cutting sections 68a to 68j is arranged by inserting a predetermined height interval, that is, a lateral movement means. Cut along the upper horizontal plane 47 and the lower horizontal plane 48 (see FIG. 2B) to ensure a sufficient height interval (step 3), and discharge the basic concrete of the cut-out portion to form the void 56 (see FIG. 2B). Form (step 4).

  In the removal method described in Patent Document 4, after applying a release material to the cut surfaces 47 and 48 of the gap 56, the grout material 25 is filled between the cut surfaces 47 and 48, the furnace bottom 36 is lifted, and the cut surface Although a lateral movement means (for example, a sliding member) is arranged on 48, in the method of the present invention, as will be described later, it is not necessary to fill with grout material, it is not necessary to lift the furnace bottom 36, and the gap 56 The lateral movement means is arranged in

  When cutting the foundation concrete of a large blast furnace along the upper horizontal plane and the lower horizontal plane, arrange the wire guide member that guides the movement of the wire saw 70 in the horizontal hole, so that the upper and lower cut surfaces do not wave in an uneven shape, Or it is preferable to cut | disconnect so that the space | interval of an upper and lower cut surface may not change.

  When the wire guide member is disposed in the horizontal hole, the wire of the wire saw 70 cuts the foundation concrete while sliding on the upper surface of the wire guide member, so that the upper and lower cut surfaces become horizontal surfaces while maintaining a predetermined height interval. . As a result, the resistance at the foundation concrete cut surface when carrying out the blast furnace bottom is reduced, and the blast furnace bottom can be smoothly carried out.

Here, the cross-sectional aspect of the wire guide member comprised using FIG.11 and FIG.12 using the H-section steel is illustrated.
The wire guide member shown in FIG. 11 has a roller 42 that supports the wire guide member 40 attached to the tip and center of the lower flange 38 of the H-section steel 37. By attaching the roller 42 to the tip and the center of the lower flange 38 of the H-shaped steel 37, the work of inserting / removing the wire guide member 40 into / from the horizontal hole 41 is facilitated.

  The wire guide member 40 shown in FIG. 12 has a roller 42 that is in contact with the side surface of the horizontal hole 41 on the left and right sides of the tip and center of the web 43 of the H-shaped steel 37.

In any of the wire guide members, the upper flange 39 guides the wire saw 70 that cuts the upper foundation concrete, and the lower flange 38 guides the wire saw 70 that cuts the lower foundation concrete. The horizontal plane is maintained while maintaining a predetermined height interval.
As a result, the upper horizontal plane 47 is cut by the upper wire saw 70, and the lower horizontal plane 48 is cut by the lower wire saw 70, thereby forming the horizontal cutting portion 49 (two-side cutting).
In addition, you may use together the attachment aspect of the roller 42 shown in FIG.11 and FIG.12.

  The height interval for cutting with a wire saw, that is, the height of the gap may be appropriately set in consideration of the diameter of the horizontal hole and the height of the lateral movement means, but is preferably 60 to 200 mm.

  When drilling horizontal holes, there is no specific order for drilling operations, but the order of drilling horizontal holes, cutting the basic concrete in the cutting section, and discharging operations may be determined.

  Drilling of horizontal holes in the boundary sections 69a to 69k of the cutting sections in order to arrange the lateral movement means (step 7) over the entire area of the horizontal cutting section 49 set in the basic concrete at the bottom of the blast furnace furnace bottom (see FIG. 3) And when the basic concrete of the cutting sections 68a to 68j is repeatedly cut (step 2 to step 6 or step 3 to step 6), when this drilling / cutting operation is performed, from one direction (for example, , 68a to 68j), but it is preferable that the non-adjacent cutting sections are regularly selected and continuously performed.

  For example, as shown in FIG. 4, first, the cutting section of 68e is cut (1 in the figure), then the cutting sections of 68a and 68j are cut simultaneously (2 in the figure), and then cutting of 68c and 68g is performed. The sections are cut simultaneously (3 in the figure), and finally the remaining cut sections are cut simultaneously (4 in the figure).

  As described above, when the drilling / cutting operation is regularly selected and performed, it is possible to suppress the uneven load distribution in the foundation concrete, so that the furnace body load is almost uniformly applied to the lateral movement means, and The unloading work will be facilitated.

(Furnace bottom part unloading process)
A lateral movement means is disposed in the gap 56 (see FIG. 2B) (step 6). Then, Step 2 to Step 6 or Step 3 to Step 6 are repeated, and across the entire horizontal cutting portion 49 set in the basic concrete at the bottom of the blast furnace bottom (see FIG. 3), the laterally moving member described below And a horizontal movement means provided with a furnace body load support member is arrange | positioned (process 7).

In the lateral movement means, the lateral movement member may have a configuration in which one or more sliding plates are placed on one floor plate.
In the lateral movement means, the furnace body load support member placed on the lateral movement member is, for example, a single arrangement of HPA (high pack anchor, fiber bag filled with mortar), HPA and α material ( Combination arrangement with garnet, spherical particles with small particle diameter, combination of one or more kinds of mortar), arrangement of α material only.

  When a floor plate and a sliding plate placed thereon are used as the laterally moving member, any one of HPA alone, a combination of HPA and α material, and α material alone can be selected as the furnace body load support member.

When HPA is used as the furnace body load support member, it is preferable to take measures regarding its fluidity when filling mortar in the HPA.
Specifically, coating the inner surface of HPA (Countermeasure A), immersing HPA in water before filling the mortar (Countermeasure B), and there is no sudden throttling in the mortar flow path. Such pipes (Countermeasure C) can be mentioned.

According to the measure A, the flow of the mortar in the HPA becomes smooth. When there is no coating, the mortar sticks and stays in the HPA, or a lump is generated, and the mortar cannot be smoothly filled. However, the countermeasure A can avoid mortar retention or lump generation, and enables smooth filling into the HPA.
According to the measure B, moisture is hardly separated from the mortar filled in the HPA. When water is separated from the mortar introduced into the HPA, the mortar stays or generates lumps in the HPA, but these can be suppressed by the measure B and smooth filling can be performed.
Regarding Measure C, if there is a portion where the flow path area is suddenly narrowed in piping or the like leading to the HPA, mortar stays easily. In such a part, for example, by using a guide pipe having a loose conical shape, it is possible to eliminate a sudden throttling and prevent the mortar from staying.
These measures will be described in detail again in the embodiment.

  In FIG. 5, one sliding plate 45 is placed on one floor plate 44 as a laterally moving member, and a combination of an HPA 51a and an α material 51b is disposed thereon as a furnace body load supporting member. The aspect of the horizontal movement means 53 which did is shown. A steel plate (SS material) is suitable as the floor plate, and a single layer of SUS material or a multilayer structure of SUS material and SS material is suitable as the sliding plate.

In the lateral movement member, if the material of the floor plate and the sliding plate is the same type, slip resistance due to galling is likely to occur between the two plates during lateral movement of the blast furnace bottom, thereby requiring a large horizontal force during lateral movement. . Accordingly, the two plates are preferably made of different materials.
As an application example, 1. Base plate SS material, sliding plate SUS material, A multi-layer structure composed of a floor plate SS material, a sliding plate SUS material (lower surface) + SS material (upper surface) can be mentioned.
In this case, in both cases, the sliding plate SUS material is worn between the sliding plate SUS material and the sliding plate SUS material that slides with each other when the bottom of the blast furnace furnace is laterally moved. Become.
In addition, by making the sliding plate a multi-layered multi-layer structure made of SUS material (lower surface) + SS material (upper surface) as described above, it is possible to make the sliding plate cheaper than a single layer of SUS material having the same thickness.

  A floor plate laid on the bottom surface of a horizontal hole having a concavo-convex surface formed by a wire of a wire saw locally receives a furnace body load via a furnace body load support member. Therefore, the thickness of the floorboard is set so that the floorboard can secure sufficient strength to withstand the local load. For example, 6 mm or more is preferable. The thickness of the sliding plate does not need to be as strong as that of the floor plate. For example, in the case of a steel plate sliding plate, a steel plate of 2.3 mm or more is sufficient.

  In the configuration of FIG. 5, one floor plate and one sliding plate are used. However, the lateral movement member may be configured by arranging two or more sliding plates on one floor plate. In this case, if a groove is provided on the upper surface of the floor plate and the groove is filled with a lubricant from outside the system, the sliding between the floor plate and the sliding plate becomes smoother.

On the other hand, only a single floor plate may be used as the lateral movement member. However, in this case, if HPA alone or an HPA + α material is placed on the floor plate as a furnace body load support member, the HPA may be damaged during lateral movement. Accordingly, when only one sheet is used as the lateral movement member, HPA alone and HPA + α material are not suitable as furnace body load support members, and it is desirable to use only α material.

  When the α material is used as the furnace body load support member, it is preferable that the α material is filled in the gap between the top surface of the floor plate and the cut surface so as to be in a consolidated state. However, in this case, it is easy to arrange the lateral movement member and the furnace load support member in the gap, but since only a small lubricating action can be obtained, the indexing force must be increased when the blast furnace bottom is laterally moved. Therefore, an indexing device having a large capacity is required.

On the other hand, when one or more sliding plates are arranged on one floor plate as a laterally moving member, the construction in the gap is more complicated than the case where the α material is used. As HPA alone, HPA + α material, and α material can all be used. Further, in this case, the frictional resistance value is small, and the indexing force is very small when the blast furnace bottom is moved laterally.

  As the spherical particles having a small particle diameter as one kind of the α material, spherical or elliptical iron balls having a maximum diameter of 10 mm or less are preferable. Moreover, it is preferable to use a garnet instead of the spherical particles.

As described above, in the lateral movement means in which the floor plate and the sliding plate are overlapped as the lateral movement member, a lubricant is filled between the floor plate and the sliding plate, thereby smoothly sliding the sliding plate with respect to the floor plate. It is preferable.
As shown in FIG. 6, a floor plate 44 in which grooves 54 are formed may be used, and a lubricant 55 (for example, oil) may be supplied by a pump P between the floor plate 44 and the sliding plate. When the lubricant is filled between the floor plate and the sliding plate, the work for carrying out the bottom of the blast furnace furnace can be performed more smoothly, safely and quickly.

7A to 7C show various aspects of the lateral movement means.
FIG. 7A shows an embodiment in which an α material 51b (garnet, spherical particles having a small particle diameter, or one or a combination of two or more mortars) is used as a furnace body load support member.
FIG. 7B shows an aspect in which the α material 51b is filled between the HPA 51a and the HPA 51a.
FIG. 7C shows an embodiment using only HPA 51a.
As described above, as the furnace body load support member, any one or two of α material and HPA may be used in combination.

  Which furnace load support member is selected is appropriately determined depending on the construction difficulty level. For example, if the gap between the floor plate and the upper surface of the gap is small, and mortar and HPA cannot be placed and installed on the lateral movement member as the furnace load support member, garnet or spherical particles with a small particle size are used. It is preferable to use it.

  As described above, after the lateral movement means is disposed in the gap 56 (see FIG. 2B) of the foundation concrete 11 (steps 6 and 7), the upper mantel 34 separated from the blast furnace bottom is lifted, and the blast furnace bottom 36 is obtained. Is carried out to the outside (outside the system) of the furnace shell 14 (step 8).

FIG. 8 shows how the blast furnace bottom is carried out.
The upper mantel is separated as follows, for example.

  After arranging the horizontal moving means including the horizontal moving member and the furnace body load supporting member over the entire area of the horizontal cutting part 49, the blast furnace 10 is blown off, and the upper part of the iron skin 29 of the blast furnace main body 13 or a plurality of locations in the middle. Each of the suspension brackets 52 is welded and fixed, and a plurality of center hole jacks 50 are attached to the furnace body 14, and the blast furnace 10 is connected to the furnace body 14 via the suspension bracket 52 and the center pole jack 50. Suspended to support.

Next, an intermediate part of the blast furnace body 13, for example, a part below the level of the annular tube 16 of the blast furnace furnace body 13 (cut line C1 in FIG. 8) and one or more parts of the intermediate part of the blast furnace body 13 (FIG. 8). The cutting line C2) is cut substantially horizontally with a predetermined width to separate the upper mantel 34 from the furnace bottom mantel 35 and divide the upper mantel 34 into a plurality of blocks.
At this time, the divided blocks of the upper mantel 34 are suspended and held on the furnace shell 14 by the suspension bracket 52 and the center hole jack 50, respectively.
After holding the upper mantel 34 in the furnace body 14 in this manner, first, the blast furnace furnace bottom portion 36 including the furnace body mantel 35 is carried out to the outside (outside the system) of the furnace body 14.
Subsequently, the center hole jack 50 for suspending the lowermost block of the upper mantel 34 is operated, and the block is lowered onto an unloading device (for example, a roller, a sliding plate, a carriage, etc.) installed on the foundation. It is carried out of the furnace body in the same manner as the bottom portion 36.
Similarly, each block of the upper mantel 34 is sequentially carried out from the lower one, and all of the upper mantel 34 is carried out.
Thus, the blast furnace body 13 is carried out of the furnace body.

The furnace top equipment such as the charging device 19 is disassembled and removed using the furnace top outrigger crane 17 and the temporary extension deck 18.
In carrying out these, a construction machine such as a dolly or a crane truck may be used, a semi-fixed facility such as a conveyor may be installed, or a plurality of these may be used in combination.

  Here, FIGS. 9 and 10 show a state immediately before carrying out when a floor plate and a sliding plate are used as the lateral movement member of the lateral movement means. FIG. 9 shows the side surface aspect, and FIG. 10 shows the planar aspect.

  Adjacent to the basic concrete 11, a heavy material transporting carriage 57 is installed, and on the upper surface of the heavy material transporting car 57, a floor plate 44 disposed in a gap portion of the basic concrete 11 is extended and disposed. In this state, the blast furnace bottom 36 is laterally moved to the upper surface of the heavy material transporting carriage 57 by pulling the pulling wire 59 having one end fastened to the bracket 60 fixed to the blast furnace bottom 36 by the jack 58.

At this time, it is necessary to prevent a side slip in the index direction of the blast furnace bottom portion 36. In order to prevent this side slip reliably, for example, the lateral movement guide member 61 shown in FIG. You may arrange in a part.
By using this lateral movement guide member, the bottom of the blast furnace furnace can be carried out more safely, smoothly and quickly without skidding in the index direction.
Further, as another method for preventing side slip, a guide rail may be installed outside the furnace bottom mantel to prevent side slip.

  The lateral movement guide member may be disposed in the gap immediately after the upper mantel separated from the bottom of the blast furnace is lifted, or may be performed together with the lateral movement means. As the lateral movement guide member, a steel pipe is usually preferable.

(Other embodiments)
Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and the material of each part, the number and arrangement of elements, and the like may be changed as appropriate in the implementation. Modifications and the like within a range in which the object can be achieved are included in the present invention.

  In the embodiment described above, the horizontal cutting portion 49 of the furnace bottom portion 36 is cut into two planes by the upper horizontal plane 47 and the lower horizontal plane 48 (see FIG. 2B, FIG. 12 and FIG. 13). Or it is good also as cutting | disconnection of four or more surfaces.

As described above, when the wire saw 70 is cut, the cut surface has an uneven shape due to the swing of the intermediate portion of the wire saw 70 that is rotationally driven, the load of the blast furnace body, and the like.
In FIG. 14, an upper horizontal plane 47 and a lower horizontal plane 48 are formed by cutting with the wire saw 70, and a cutout portion 36 </ b> A therebetween can be pulled out in the horizontal direction. The surfaces 47A and 48A of the cut-out portion 36A are formed by cutting with the wire saw 70 in the same manner as the upper horizontal plane 47 and the lower horizontal plane 48, and have a predetermined interval (the thickness of the wire saw 70) with respect to the upper horizontal plane 47 and the lower horizontal plane 48. ).

When such a cutout portion 36A is extracted in the horizontal direction, the convex portions (47B, 48B) of the surfaces 47A, 48A of the cutout portion 36A interfere with the convex portions (47C, 48C) of the upper horizontal plane 47 and the lower horizontal plane 48, and are pulled out. Can be difficult.
Particularly, when the adjacent interval between the horizontal holes 41 to be drilled first is large (5 m or more), the swing width of the wire saw 70 also increases, so that the unevenness of the surfaces 47A and 48A of the cut-out portion 36A and the unevenness of the upper horizontal plane 47 and the lower horizontal plane 48 Is increased, and interference is large in the horizontal pull-out, and it is necessary to enhance the pull-out force.

  On the other hand, the above-described interference can be greatly reduced by performing the three-surface cutting as shown in FIGS. 15A to 15E. In the following steps, FIGS. 15A to 15C are the same as the two-sided cutting described above, and three-sided cutting is realized by adding FIGS. 15D and 15E.

First, as shown in FIG. 15A, the wire guide member 40 using the same H-shaped steel 37 as in the above embodiment is introduced into the horizontal hole 41 of the furnace bottom portion 36, and the wire saw 70 is cut while being guided by the upper flange 39. . As a result, the furnace bottom 36 is cut at the upper horizontal plane 47.
Next, as shown in FIG. 15B, the wire saw 70 is cut while being guided by the lower flange 38 . Thereby, the furnace bottom part 36 is cut | disconnected by the lower level surface 48, and the area | region pinched | interposed by these upper level surface 47 and the lower level surface 48 is cut out as cut-out part 36A.

By these cuttings, a gap having a thickness D1 is generated between the furnace bottom portion 36 and the cutting portion 36A as a cutting trace by the wire saw 70 guided by the upper flange 39 , and a cutting trace by the wire saw 70 guided by the lower flange 38. As a result, a gap of thickness D2 is generated.
As shown in FIG. 15C, the cutout portion 36A that has lost its support due to cutting sinks due to gravity, and a gap D3 is generated only above the cutout portion 36A. The gap D3 corresponds to a distance obtained by adding the gap D1 and the gap D2 described above.
In this state, the wire guide member 40 is extracted. By the processing so far, the two-sided cutting corresponding to the above-described embodiment is performed.

Subsequently, as illustrated in FIG. 15D, another wire guide member 40 </ b> A is introduced into the horizontal hole 41.
The wire guide member 40A includes guide plates 40B and 40C and a lifting prevention plate 40D. The guide plates 40B and 40C and the lifting prevention plate 40D are each formed of a steel plate. In the cross-sectional shape, the guide plates 40B and 40C are parallel to each other, and the lifting prevention plate 40D is disposed at a right angle to the guide plates 40B and 40C. Yes.

  40 A of wire guide members are hold | maintained so that the guide plates 40B and 40C may be horizontal in the state installed in the horizontal hole 41, and the anti-lifting plate 40D may become vertical. The upper surface of the lower guide plate 40B is disposed substantially in the middle (slightly below the middle) of the cut-out portion 36A, and the wire saw 70 is guided to the height on this upper surface. The upper guide plate 40C is disposed such that its lower surface is lower than the upper surface of the cutout portion 36A, and restricts the movement so that it does not come off the cutout portion 36A even when the wire saw 70 shakes. The lifting prevention plate 40D prevents the wire guide member 40A from floating by contacting the upper inner surface of the horizontal hole 41, and the guide plates 40B and 40C are maintained at a predetermined height in the horizontal hole 41 as described above. The guide function of the wire saw 70 by the guide plates 40B and 40C is properly maintained.

By cutting while guiding the wire saw 70 with such a wire guide member 40A, the cut portion 36A is cut at the intermediate horizontal plane 49A. By this cutting, the cut-out portion 36A is divided into an upper portion 36B and a lower portion 36C, and a gap having a thickness D4 is generated as a cut mark by the wire saw 70 between them.
As shown in FIG. 15E, in the cutout portion 36A, the upper portion 36B that has lost support due to cutting sinks due to gravity and overlaps with the lower portion 36C, and a gap D5 is generated only on the upper side of the cutout portion 36A. The gap D5 corresponds to the distance obtained by adding the gap D3 and the gap D4 described above, that is, the distance obtained by adding the distances D1, D2, and D4 of the three cutting traces.
In this state, the wire guide member 40A is extracted. By the processing so far, three-surface cutting is performed, and a gap D5 larger than the two-surface cutting described above is obtained. For this reason, even when the upper horizontal plane 47 and the lower horizontal plane 48 are uneven, the large gap D5 can avoid interference during pulling out, and the cutout portion 36A can be pulled out smoothly.

(Example)
Hereinafter, specific examples based on the above-described embodiment of the present invention will be described.
The bottom of the blast furnace erected on the 21 m × 21 m foundation concrete was carried out of the system by using the lateral movement means shown in FIG. 5 described above.
A position 1.5 m below the bottom of the furnace was a horizontal cutting portion, and 13 cutting sections having a width of 1.5 m were set in the cutting portion. A horizontal hole having a diameter of 100 mm was drilled at the boundary of the cutting section, and the basic concrete between the horizontal holes was horizontally cut at a height interval of 70 mm, and the basic concrete in the cut portion was discharged.

Here, the lateral movement means shown in FIG. 5 described above was arranged, and the bottom of the furnace was carried out. As a result, from the blast furnace blowing to the completion of carrying out the bottom of the furnace was carried out in 13 days.
This work day is significantly shortened compared to the 17 work days conventionally required for carrying out the furnace bottom of the same scale.

  The conditions of the above embodiment are one condition example adopted for confirming the feasibility and effect of the present invention, and the present invention is not limited to this one condition example. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

(Example of mortar filling into HPA)
In the above-described embodiment, it has been described that when HPA is used as the furnace body load support member, it is preferable to take measures related to the fluidity of the mortar filled in the HPA.
Here, specific examples regarding each countermeasure will be described.
(1) Test apparatus The configuration shown in FIG. 5 described above, that is, one sliding plate 45 is placed on one floor plate 44 as a laterally moving member, and an HPA 51a and an α material are used as a furnace load support member thereon. A lateral moving means 53 configured by combining 51b is used.
Six HPAs 51a are provided, each having a cylindrical shape formed from laminated fibers, and the length of the horizontal portion is about 18 m.

In order to fill such HPA 51a with mortar, a mortar filling pipe was connected to one end thereof.
As shown in FIG. 16, the mortar filling pipe 51c is a pipe having a diameter of 50A arranged in the vertical direction and filled with non-shrink mortar using a head pressure of 2 m in height. The lower end of the pipe 51c is bent in the horizontal direction and connected to the HPA 51a. The end portion of the HPA 51a is drawn out from the furnace bottom portion 36, and is covered with the lower end of the pipe 51c and fixed by a fastening band 51d.

  In such a configuration, when the mortar is filled from the pipe 51c and the mortar flows out from the other end of the HPA 51a, it is determined that the HPA 51a is sufficiently filled.

(2) Test conditions Six examples were examined by combining the countermeasures (Countermeasure A to Countermeasure C) described in the above-described embodiment.
Example 1: No countermeasure A, no countermeasure B, no countermeasure C ... No measures Example 2; measures A implemented, measures B not implemented, measures C implemented. ... Countermeasure A only Example 3: No measure A, measure B implemented, measure C absent. ... Countermeasure B only Example 4: No measure A, no measure B, measure C implemented. ... Countermeasure C only Example 5; Countermeasure A implemented, Countermeasure B not implemented, Countermeasure C implemented. ... Countermeasure C + Countermeasure A
Example 6: No measure A, measure B implemented, measure C implemented. ... Countermeasure C + Countermeasure B

Here, the contents of each countermeasure are as follows. Apply coating to the inner surface of the HPA (Countermeasure A), soak the HPA in water before filling the mortar (Countermeasure B), and make piping that does not cause a sudden restriction in the mortar flow path. (Countermeasure C).
Of these, measure C is as follows.

In the configuration of FIG. 16 described above (without countermeasure C), the mortar introduced into the HPA 51a from the pipe 51c having a diameter of 50A is subjected to a rapid restriction when introduced into the furnace bottom portion.
As shown in FIG. 17, as countermeasure C, a moderate throttle pipe 51e is installed at a portion introduced from the pipe 51c to the HPA 51a, and the pipe 51c is also changed to a smaller diameter 32A.
The throttle tube 51e has a diameter of 32A at the base end and is connected to the end of the pipe 51c. The tip of the throttle tube 51e is a thin tube, and is inserted into the HPA 51a in the furnace bottom 36 over a length of 100 mm. The distal end side and the proximal end side of the throttle tube 51e have a very gentle conical shape, and the mortar from the pipe 51c is very gently throttled and introduced into the HPA 51a.

(3) Test results Example 1; no countermeasures.
No mortar flowed out from any outlet of HPA 51a (the end opposite to the inlet side where mortar was injected), and the mortar filling was insufficient. It is presumed that the water in the mortar was squeezed out through the HPA at the rapid squeezed portion at the inlet of the HPA 51a, and a mortar mass was formed, blocking the flow.
Example 2; Countermeasure A only.
Example 3; Countermeasure B only.
There was no mortar outflow from the outlet of any HPA 51a, and mortar filling was insufficient. As described in Example 1, it is presumed that the water in the mortar was squeezed out through the HPA at the rapid squeezed portion at the inlet of the HPA 51a, and a mortar mass was formed, blocking the flow. For this reason, mortar is not introduced into the HPA 51a, and measures A and B do not function effectively.

Example 4; Countermeasure C only.
The outflow of mortar was confirmed from the outlet of each HPA 51a. It is presumed that, due to the measure C, the water in the mortar was not squeezed out, the mortar mass was not generated, and the flow was not blocked.
Example 5: Countermeasure C + Countermeasure A
Example 6: Countermeasure C + Countermeasure B
More mortar outflow was confirmed from the outlet of each HPA 51a. It is presumed that the squeezing of mortar water was suppressed by the countermeasure A or the countermeasure B over the entire length of the HPA 51a in addition to the damming cancellation by the countermeasure C described in the fourth embodiment.

  As described above, when HPA is used as the furnace body load support member, it is understood that the above-described countermeasure C is desirably employed, and it is further desirable to employ countermeasure A and countermeasure B in combination with this.

  INDUSTRIAL APPLICABILITY The present invention can be used as a method for dismantling the blast furnace bottom for dismantling the bottom of the furnace in a short time during blast furnace renovation.

It is a figure which shows the one aspect | mode of the blast furnace and furnace main body which concerns on one Embodiment of this invention. It is sectional drawing which shows the furnace bottom part of the blast furnace in the said embodiment. It is sectional drawing to which the 2B part of the said FIG. 2A was expanded. It is a figure which shows the one aspect | mode which set the horizontal cutting part to the blast furnace bottom part in the said embodiment, and set the some cutting division to this cutting part. It is a figure which shows an example in the case of cut | disconnecting a cutting | disconnection division | segmentation in the blast furnace bottom part in the said embodiment. It is a figure which shows the horizontal movement means in the said embodiment. It is a figure which shows the baseplate in which the groove | channel filled with the lubricant material in the said embodiment was formed. It is a figure which shows another aspect of a horizontal movement means provided with the furnace body load support member using (alpha) material. It is a figure which shows another aspect of a horizontal movement means provided with the furnace body load support member using HPA + (alpha) material. It is a figure which shows another aspect of a horizontal movement means provided with the furnace body load support member which used HPA independently. It is a figure which shows the carrying-out aspect of the furnace bottom part of the blast furnace in the said embodiment. It is a figure which shows the side aspect of the blast furnace bottom part just before carrying out in the horizontal movement means which uses a floor plate and a sliding board as a horizontal movement member in the said embodiment. It is a figure which shows the plane aspect of the blast furnace bottom part just before carrying out in the horizontal movement means which uses a floor plate and a sliding board as a horizontal movement member in the said embodiment. It is a figure which shows the cross section of the wire guide member in the said embodiment. It is a figure which shows the other cross section of the wire guide member in the said embodiment. It is a figure which shows the one aspect | mode of the lateral movement guide member which can be utilized for the said embodiment. It is a figure which shows the state which pulls out the cut part of a blast furnace bottom part. It is a figure which shows the middle state of the three-surface cutting | disconnection of this invention. It is a figure which shows the middle state of the three-surface cutting | disconnection of this invention. It is a figure which shows the middle state of the three-surface cutting | disconnection of this invention. It is a figure which shows the middle state of the three-surface cutting | disconnection of this invention. It is a figure which shows the completion state of the three-surface cutting | disconnection of this invention. It is a figure which shows the Example of this invention. It is a figure which shows the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Blast furnace 11 Foundation concrete 12 Laying beam 13 Blast furnace main body 14 Furnace rod 15 Exhaust pipe 16 Annular pipe 17 Furnace top outrigger crane 18 Temporary extension deck 19 Loading device 21 Beam or temporary jack receiving beam 22 Post 23 H-section steel 24 Cooling pipe 25 Grout material 26 Furnace bottom plate 28 Stamp material 29 Iron shell 30 Stave cooler 31 Furnace bottom brick layer 32 Kneaded lump 33 Residue 34 Upper mantel 35 Furnace bottom mantel 36 Blast furnace bottom 37 H-shaped steel 38 Lower flange 39 Upper flange 40 Wire Guide member 41 Horizontal hole 42 Roller 43 Web 44 Base plate 45 Sliding plate 46 Sliding surface 47 Upper horizontal surface (cut surface)
48 Lower horizontal surface (cut surface)
49 Horizontal cutting part 50 Center hole jack 51a HPA
51b alpha member 52 hanging bracket 53 transverse moving means 54 groove 55 lubricant 56 gap portion 57 heavy transport vehicle 58 jack 59 puller wire 60 bracket 61 traverse guide member 68a~68j cutting segment 69a~69k boundary 70 wire saw 70a ~ 70j Wire P pump

Claims (14)

A method for disassembling a blast furnace bottom part by separating the blast furnace bottom part from a foundation concrete or base grout located below the blast furnace furnace bottom part and carrying it out,
Using a lateral movement means comprising a floor plate and a sliding plate and having a lateral movement member for carrying out the bottom of the blast furnace furnace, and a furnace body load support member for supporting the furnace body load,
A method for disassembling a blast furnace bottom, wherein the following steps 1 to 7 are performed in advance during operation of the blast furnace, and then the following step 8 is performed during a repair period after the blast furnace is blown off.
Step 1: A plurality of cutting sections parallel to the drawing direction of the blast furnace bottom are set in the horizontal cutting part set in the basic concrete or base grout located below the bottom of the blast furnace to be carried out.
Step 2: Drill adjacent horizontal holes parallel to the pull-out direction in the foundation concrete or base grout at the boundary of the cutting section.
Step 3: A wire saw wire is inserted into the adjacent horizontal hole, and the basic concrete of the cutting section is cut along an upper horizontal plane and a lower horizontal plane that maintain a required height.
Process 4: The cut | disconnected basic concrete or base grout between the said upper horizontal surface and a lower horizontal surface is discharged | emitted, and the space | gap part parallel to the said drawer | drawing-out direction is formed.
Step 5: The laterally moving member is disposed in the gap with the sliding plate facing up.
Step 6: The furnace body load support member is disposed in a gap between the upper surface of the sliding plate and the upper horizontal surface.
Step 7: Steps 2 to 6 or Steps 3 to 6 are repeated, and the lateral movement means is arranged over the entire horizontal cutting portion set in the foundation concrete or base grout.
Step 8: After separating the upper mantel from the bottom of the blast furnace and lifting and fixing it, a horizontal force is applied to the bottom of the blast furnace, and the floor plate and the sliding plate are slid from the bottom of the blast furnace to the sliding plate. Is taken out of the system.   The method for disassembling a blast furnace bottom according to claim 1, wherein a lateral movement guide member for preventing a side slip in a pulling direction at the time of lateral movement is disposed on all or a part of the horizontal holes.   After arranging a wire guide member for maintaining the wire level of the wire saw constant in the horizontal hole, the wire saw wire is inserted along the guide member of the horizontal hole, and the basic concrete or base grout of the cutting section is inserted. 2. The method of disassembling a blast furnace bottom according to claim 1, wherein cutting is performed along an upper horizontal plane and a lower horizontal plane that maintain a required height.   The bottom of the blast furnace according to claim 3, wherein a lateral movement guide member for preventing a side slip relative to an index direction at the time of lateral movement is disposed in all or a part of the horizontal hole after discharging the wire guide member. Dismantling method.   The blast furnace bottom portion according to claim 3 or 4, wherein the wire guide member is a long steel material including a tip in a loading direction into a horizontal hole and a roller at the tip and the center. Dismantling method.   The method for disassembling a blast furnace bottom according to any one of claims 1 to 5, wherein the horizontal hole has a diameter of 60 to 200 mm.   The method for disassembling a blast furnace bottom according to any one of claims 1 to 6, wherein an interval between adjacent horizontal holes is 0.45 to 5 m.   The said furnace body load support member is comprised by any 1 type or the combination of 2 or more types of garnet, a spherical particle with a small particle size, and mortar, The one in any one of Claims 1-7 characterized by the above-mentioned. Method of dismantling the bottom of the blast furnace furnace.   The method for disassembling a blast furnace bottom according to any one of claims 1 to 7, wherein the laterally moving member is composed of a floor plate, a sliding plate, and a lubricant filled between the floor plate and the sliding plate. .   The method for disassembling a blast furnace bottom according to claim 9, wherein the total number of the floor plate and the sliding plate is two or more.   The method for dismantling a blast furnace bottom according to claim 9 or 10, wherein a lubricant is supplied from outside the system to a sliding surface between the floor plate and the sliding plate.   The furnace body load support member is composed of one or a combination of two or more of garnet, spherical particles having a small particle diameter, and mortar, and a high pack anchor (HPA). Item 12. A method for disassembling a blast furnace bottom according to any one of Items 9 to 11.   The method for disassembling a blast furnace bottom according to claim 8 or 12, wherein the spherical particles having a small particle diameter are spherical or elliptical iron balls having a maximum diameter of 10 mm or less.   When repeating the said process 2-the process 6 or the process 3-the process 6, the cutting division which is not adjacent is selected suitably and it implements continuously, The one in any one of Claims 1-13 characterized by the above-mentioned. Method of dismantling the bottom of the blast furnace furnace.

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