KR101322251B1 - Dismantling method of bottom section of blast furnace - Google Patents

Abstract

The dismantling method comprises the following steps 1 to 8. Step 1: A plurality of cutting sections parallel to the drawing direction are set to the horizontal cutting section set on the foundation concrete of the blast furnace furnace bottom. Step 2: A horizontal hole parallel to the drawing direction is drilled into the foundation concrete at the boundary of the cut section. Step 3: The wires are inserted into horizontal holes adjacent to each other to cut the foundation concrete of the cutting division along the upper horizontal plane and the lower horizontal plane. Step 4: The base concrete between the upper horizontal plane and the lower horizontal plane is discharged to form voids. Step 5: Arrange the transverse member with the slip plate facing up in the gap. Step 6: A furnace load supporting member is provided in the 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 to arrange the lateral movement means over the entire horizontal cut portion. Step 8: After separating the upper mantle from the bottom of the furnace, the upper mantle is pulled up to give a horizontal force, and the pallet and the slipping plate are slid to take out the sheet from the bottom of the furnace to the slipping plate.

How to dismantle the bottom of the furnace

Description

Dismantling method of blast furnace bottom {DISMANTLING METHOD OF BOTTOM SECTION OF BLAST FURNACE}

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

Conventionally, when dismantling the bottom of a blast furnace in the number of blast furnaces and taking it out of the system, the dismantling operation is performed after discharging molten iron, slag, etc. remaining in the bottom of the blast furnace as much as possible. Several methods of shortening disassembly air in such a dismantling operation are proposed so far (for example, refer patent document 1 and 2).

Patent Document 1 discloses that when the blast furnace is blown out and the solidified layer and the brick layer remaining in the bottom of the furnace are taken out and removed outside the furnace, the furnace body of the blast furnace is cut horizontally at a position higher than the solidified layer, and is above the cut position. After the furnace body is installed as it is, it is fixed from the blast furnace furnace furnace to a jack or the like, and the furnace body shell lower than the cutting position is removed over the whole circumference of the furnace body, and the solidified layer and the furnace brick are pulled out of the furnace integrally. Disclosed is a method for dismantling a blast furnace bottom.

According to this dismantling method, the dismantling air can be shortened as compared with the conventional method of dividing remnants and carbon bricks by blasting and transporting them out of the furnace, but this dismantling method forms temporary openings in the bottom of the blast furnace before ejection. The molten iron and slag remaining in the bottom of the furnace are discharged from the opening, followed by pouring water from the top of the furnace to cool down the residue and the furnace. The amount of work for unloading the water layer and the lower brick integrally is so high that the overall dismantling air is not necessarily shortened.

In addition, in the dismantling method, the shell of the bottom of the blast furnace furnace (the lower shell of the furnace lower than the cutting position of the furnace) and the bottom plate are cut and separated so that the bottom of the blast furnace can be pulled up or pushed up by the jack. Therefore, there is a problem that the rail for drawing out, a roller member, etc. cannot be arrange | positioned under the cut-off furnace brick, and the drawing operation of a blast furnace bottom part becomes unstable.

On the basis of the above problem, the present applicant sets a horizontal cut portion divided into a plurality of cutting divisions in the base concrete lower than the support beam provided in the lower part of the blast furnace main body during operation before blast furnace ejection in Patent Literature 2, Maintain an upright state, and cut each cutting section with a wire saw, and the part cut with the wire saw (i) secures peelability, fills the grout material, and hardens the grout of the blast furnace body after hardening. A method for dismantling a blast furnace furnace bottom is proposed, wherein the horizontal cutting portion is sequentially cut with wire saw while supporting the load or (ii) filling the sand or iron particles to support the load of the blast furnace body.

According to this dismantling method, the bottom of the blast furnace furnace consisting of the supporting beam and the nose mantle, which is integrally coupled, is lifted up with a jack or the like to be separated from the base concrete, and the lateral movement means is laterally moved by arranging the transverse means in the space. It loads on a means, and it moves out laterally. Therefore, the bottom of the blast furnace can be dismantled and taken out in the unified working order, regardless of the solidification state and amount of the solidified residue inside the blast furnace furnace bottom, thereby greatly reducing the dismantling air. have.

In the dismantling method, a rail member, a trolley, a roller, a pneumatic flotation device or the like is disclosed as a lateral moving means for carrying out the blast furnace furnace bottom portion. It is necessary to secure the separation space of the height equal to the height + margin of the deflection + lateral movement means (work space for introduction of the lateral movement means, etc.).

In other words, the dismantling method has a problem that the work load such as jack up work of the bottom of the furnace necessary for securing the half space in consideration of the "bending of the blast furnace body", and the work of attaching the bracket for the jack up is increased.

Therefore, in view of the above problem, the present applicant minimizes the space for inserting and arranging the lateral movement means for carrying out the furnace in Patent Literature 3, and does not perform jack-up work. As a result, the air for dismantling the blast furnace is further shortened. Therefore, he proposed a method of dismantling the furnace body.

Moreover, in patent document 4, the furnace body which isolate | separates the upper side of the range to remove in a blast furnace furnace body, cut | disconnects the base concrete or base grout of the lower side of the range to remove by wire saw, and integrally bonded the support beam and the furnace mantle. The method of dismantling the blast furnace body which raises the structure, arrange | positions the "sliding member" as a transverse means for carrying out a furnace bottom, and puts a furnace body on a transverse means to move it to the outside to a furnace body was disclosed. .

However, when dismantling and dismantling a large blast furnace, for example, a large blast furnace of 5000 ~ 6000 m 3, according to the conventional method, the residue of about 4000t or more must be excluded from the bottom of the furnace, and thus the dismantling air inevitably prolongs. In addition, when the demolition method is applied, the amount of warpage of the blast furnace furnace is large, so there is a limit to minimize the space for disposing the lateral movement means for carrying out the furnace bottom, and the load of the jack-up operation is not reduced, and the dismantling air is Prolonged.

In addition, when the demolition method is applied to dismantling or dismantling a large blast furnace, a device and equipment of a required size are required to lift the bottom of the furnace of about 4000 tons or more, and also the required strength and scale are required to carry out the bottom of the blast furnace. Requires transverse means.

When dismantling a large blast furnace in this manner, the apparatus and equipment required for the dismantling work inevitably become large, and the dismantling method is complicated, and the dismantling air is prolonged. In other words, there is no suitable dismantling method for dismantling and dismantling a furnace in a short time in dismantling and dismantling of a large blast furnace.

Patent Document 1: Japanese Patent Application Laid-Open No. 10-96005

Patent Document 2: Japanese Patent No. 3684201

Patent Document 3: Japanese Patent Application No. 2004-379284

Patent Document 4: Japanese Patent Application No. 2005-108780

This invention is made | formed in view of the said situation of the blast furnace disassembly technique, and an object of this invention is to provide the universal disassembly method which can disassemble a blast furnace in a short time including a large blast furnace.

The present inventors believe that raising the blast furnace bottom or pushing it up to a jack to arrange the transverse means at the bottom of the blast furnace furnace bottom end complicates the dismantling sequence and prolongs the dismantling air. The decommissioning method which can arrange | position a transverse means in the base concrete or base grout of the bottom of a blast furnace without raising a jack or pushing it up with a jack was examined carefully.

As a result, the foundation concrete or base grout at the bottom of the furnace bottom is cut in the horizontal direction by wire saw to form a void having a required height, and when the lateral movement means is disposed directly at the void, the blast furnace bottom is pulled up or jacked up. They found that they did not need large-scale equipment and equipment needed for their backs, and the preparation for carrying out was simplified, and the dismantling air at the bottom of the blast furnace was greatly reduced.

The present invention is a method of disassembling the bottom of the blast furnace furnace to separate the blast furnace furnace bottom from the base concrete or base grout located below the bottom of the blast furnace furnace, the transverse movement consisting of a pallet and a sliding plate and to remove the blast furnace furnace bottom The following steps 1 to 7 are performed in advance during the operation of the blast furnace by using the lateral movement means provided with the member and the furnace load supporting member for supporting the furnace load, and then the following step 8 is performed during the repair period after the blast furnace ejection. Characterized in that.

Process 1: The cutting part parallel to the drawing direction of the blast furnace furnace bottom part is set in multiple horizontal cut | disconnecting parts set to the foundation concrete or base grout located under the blast furnace furnace bottom part to carry out.

Step 2: A horizontal hole parallel to and adjacent to each other in the drawing direction is drilled into the base concrete or the base grout at the boundary of the cut section.

Step 3: The wire of the wire saw is inserted into the horizontal holes adjacent to each other, and the foundation concrete of the cut section is cut along the upper horizontal plane and the lower horizontal plane to maintain the required height.

Step 4: The cut base concrete or the base grout between the upper horizontal plane and the lower horizontal plane is discharged to form the voids parallel to the drawing direction.

Step 5: The lateral movement member is disposed with the slip plate facing upward in the gap.

Step 6: The furnace body load supporting member is provided in the 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 to arrange the lateral movement means over the entire horizontal cut portion set in the foundation concrete or base grout.

Step 8: After separating the upper mantle from the bottom of the furnace, the upper mantle is pulled up to give a horizontal force to the bottom of the furnace, and the pallet and the slipping plate are slid to take the pallet from the blast furnace bottom to the slipping plate out of the system.

According to the present invention, all the transverse means for transversely moving the bottom of the furnace can be attached during the operation before blast furnace ejection, so that the number of days of transverse means performed after the ejection disclosed in the patent document can be shortened.

That is, during the operation of the blast furnace, an air gap is formed in the base concrete or base grout below the blast furnace furnace base to allow the horizontal movement means including the horizontal movement member and the furnace load supporting member to be sufficiently disposed, and the horizontal movement means is introduced into the air gap. The lateral movement means supports the load at the top of the cut and can be quickly and reliably prepared and completed over the entire surface of the horizontal cut at the bottom of the blast furnace, thereby reducing the number of work days required for the dismantling preparation work.

Further, according to the present invention, a transverse means provided with a transverse member and a furnace load supporting member is disposed in the air gap, without requiring a large-scale device or equipment for raising or jacking up the bottom of the blast furnace furnace. Since it is only necessary, the number of working days until the preparation for export, that is, the working days required for the preliminary construction, can be greatly reduced.

Further, according to the present invention, the bottom of the blast furnace furnace, which is a heavy object, does not need to be pulled up, and therefore, the bottom of the blast furnace furnace (the rigid member does not have a rigid member) in which a rigid member such as a support beam is not attached to the bottom of the furnace cannot be pulled up or jacked up. ) And the bottom of the blast furnace can be easily taken out with a large amount of residue.

As a result, according to this invention, the disassembly air of a blast furnace furnace can be shortened significantly.

In the present invention, after placing a wire guide member for maintaining a constant wire level of the wire saw in the horizontal hole, by inserting the wire saw wire along the guide member in the horizontal hole to the foundation concrete of the cut section Alternatively, it is preferable to cut the base grout along the upper horizontal plane and the lower horizontal plane to maintain the required height.

In this invention, it is preferable to arrange | position the horizontal movement guide member which prevents the side sliding to the traction direction at the time of horizontal movement to all or one part of the said horizontal hole.

When arrange | positioning a wire guide member in a horizontal hole, it is preferable to provide a lateral movement guide member after discharging the wire guide member in a horizontal hole.

In this invention, it is preferable that the said wire guide member is a long steel material provided with the front-end | tip of a carrying-in direction to a horizontal hole, and a roller at the said front-end | tip and a center part.

In this invention, it is preferable that the diameter of the said horizontal hole is 60-200 mm.

In this invention, it is preferable that the adjacent space | interval of the said horizontal hole is 0.45-5m.

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In this invention, it is preferable that the said furnace load bearing member is comprised by the garnet, the spherical particle with a small particle diameter, and any 1 type or 2 or more types of mortar.

In the present invention, the lateral movement member is preferably composed of a pallet, a slip plate, and a lubricant filled between the pallet and the slip plate.

In this invention, it is preferable that the total number of sheets of the said pallet and a sliding board is two or more sheets.

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

In the present invention, it is preferable that the furnace load supporting member is composed of a garnet, a spherical particle having a small particle diameter, a mortar, or a combination of two or more kinds thereof, and a high pack anchor (HPA).

In the present invention, the spherical particles having a small particle diameter are preferably spherical or elliptic iron balls having a maximum diameter of 10 mm or less.

In this invention, when repeating the said process 2-process 6 or the process 3-process 6, it is preferable to select the non-adjacent cut | disconnection division suitably and to carry out continuously.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one form of the blast furnace and furnace furnace 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.

FIG. 2B is an enlarged cross-sectional view of part 2B of FIG. 2A.

It is a figure which shows the aspect which set the horizontal cut part to the blast furnace furnace bottom part in the said embodiment, and set several cut | divided divisions into the said cut part.

It is a figure which shows an example in the case of cut | disconnecting a cutting | disconnection division in the blast furnace furnace bottom part in the said embodiment.

Fig. 5 is a diagram illustrating the lateral movement means in the above embodiment.

It is a figure which shows the pallet in which the groove | channel which filled the lubricant in the said embodiment was formed.

It is a figure which shows another form of the lateral movement means provided with the furnace-body load support member which used the (alpha) material.

It is a figure which shows another form of the horizontal movement means provided with the furnace-body load support member which used HPA + (alpha) material.

It is a figure which shows another form of the lateral movement means provided with the furnace-body load support member which used HPA independently.

8 is a view showing a carrying out form of the blast furnace furnace bottom in the above embodiment.

It is a figure which shows the side shape of the blast furnace furnace bottom part just before carrying out in the horizontal movement means which uses a pallet and a sliding board as a horizontal movement member in the said embodiment.

It is a figure which shows the planar shape of the blast furnace furnace bottom part just before carrying out in the horizontal movement means which uses a pallet 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 one form of the lateral movement guide member which can be used for the said embodiment.

It is a figure which shows the state which draws out the cut part of blast furnace furnace bottom part.

It is a figure which shows the state in the middle of cutting of 3 surfaces of this invention.

It is a figure which shows the state in the middle of the cutting | disconnection of three surfaces of this invention.

It is a figure which shows the state in the middle of cutting of 3 surfaces of this invention.

It is a figure which shows the state in the middle of the cutting | disconnection of three surfaces of this invention.

It is a figure which shows the completion state of the 3-sided cutting of this invention.

16 is a diagram showing an embodiment of the present invention.

17 is a diagram showing an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS (S)

10: blast furnace 11: foundation concrete

12: receiving beam 13: blast furnace body

14: nochero 15: exhaust pipe

16: annular tube 17: top outrigger crane

18: hypothetical protrusion deck 19: charging device

21: Beam or Hypothetical Jack Base Beam 22: Shoring

23: H-beam 24: cooling tube

25: grout material 26: furnace bottom plate

28: stamp material 29: iron

30: stave cooler 31: brick floor layer

32: mixed slag lump 33: afterglow

34: upper mantle 35: nozer mantle

36: blast furnace furnace bottom 37: H section steel

38: lower flange 39: upper flange

40: wire guide member 41: horizontal hole

42: roller 43: web

44: pallet 45: slip plate

46: sliding surface 47: upper horizontal surface (cutting surface)

48: lower horizontal plane (cutting surface) 49: horizontal cutout

50: center hole jack 51a: HPA

51b: α material 52: pulling down bracket

53: transverse means 54: groove

55 lubricant 56 voids

57: heavy material conveyance cart 58: jack

59: towing wire 60: bracket

61: lateral movement guide member 68a ~ 68j: cutting division

69a ~ 69k: boundary 70: wire saw

70a ~ 70j: Wire P: Pump

This invention is demonstrated based on drawing.

1 shows one form of a blast furnace and a furnace body to which the present invention is applied. The blast furnace 10 is comprised by installing the blast furnace main body 13 on the support beam 12 attached to the foundation concrete 11, and standing.

A plurality of exhaust pipes 15 are installed at the upper part of the blast furnace 10, and the blast furnace 10 and the exhaust pipe 15 are furnace furnaces 14 including props 22 which are installed in four places around the blast furnace 10. Is supported.

At the lower part of the furnace passage 14, an annular tube 16 surrounding the blast furnace 10 is maintained, and a top outrigger crane 17 for carrying the charging device 19 is installed at the upper end, and in the middle section A temporary projecting deck 18 for performing maintenance check and dismantling of the facility is formed.

The beam or temporary jack support beam 21 which can attach the center hole jack 50 which can support the blast furnace main body 13 to any level of the furnace furnace which can support a blast furnace is arrange | positioned.

The outer side of the blast furnace main body 13 is covered with a steel shell 29, and a plurality of stave coolers 30 are disposed inside the main body 13.

After the blast furnace 10 is ejected, the mixed slag lump 32 in which the uncoiled coke layer and the molten iron or the slag are integrally solidified remains inside the bottom brick layer 31 inside the blast furnace body 13, and Cooled and solidified remnants 33 remain below the crosstalk slag mass 32.

The blast furnace body 13 is composed of an upper mantle 34 on the upper side and a lower mantle 35 (incorporating remaining bricks and residual lines 33).

In addition, in this invention, the support beam 12 and the nodling mantle 35 which were integrally joined are made into the furnace bottom part 36. As shown in FIG.

The cross-sectional structure of the furnace bottom part 36 is shown in FIG. 2A, and the expanded state of the part 2B is shown in FIG. 2B.

The supporting beam 12 on the foundation concrete 11 consists of a plurality of H-shaped steels 23 arranged side by side, and a furnace plate 26 disposed thereon.

In addition, the cooling tube 24 is arrange | positioned between the adjacent H-beams 23, The grout material 25 or the stamp material 28 is inject | poured and solidified below the cooling tube 24, respectively.

Hereinafter, the procedure of the dismantling method of the blast furnace furnace which is this invention (this invention method) is demonstrated.

The present invention basically uses a lateral movement means having a lateral movement member for carrying out a blast furnace furnace bottom and a furnace load supporting member for supporting a furnace load, and uses a pallet and a sliding plate as this lateral movement member. Then, the following steps 1 to 7 are performed in advance during the operation of the blast furnace, and thereafter, step 8 is performed during the repair period after the blast furnace ejection.

Step 1: A plurality of cutting divisions parallel to the drawing direction of the furnace bottom part are set in the horizontal cutting part set in the foundation concrete or base grout located under the blast furnace furnace bottom part to carry out.

Step 2: A horizontal hole parallel to the drawing direction is drilled in the foundation concrete or base grout at the boundary of the cut section.

Step 3: The wires of the wire saws are inserted into the horizontal holes adjacent to each other, and the basic concrete of the cutting section is cut along the upper horizontal plane and the lower horizontal plane to maintain the required height (height required for the arrangement of the lateral movement means).

Step 4: The cut base concrete or the base grout between the upper horizontal plane and the lower horizontal plane is discharged to form the voids parallel to the drawing direction.

Step 5: The lateral movement member is disposed with the slip plate facing upward in the gap.

Step 6: The furnace body load supporting member is disposed in the 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 to arrange the lateral movement means over the entire horizontal cut portion set in the foundation concrete or base grout.

Step 8: The upper mantle is separated from the bottom of the furnace and pulled up to give a horizontal force to the bottom of the furnace, and the pallet and the sliding plate are slid so that the blast furnace furnace bottom to the slip plate (blast furnace furnace bottom, furnace load supporting member , Slip plate) are taken out of the system.

Hereinafter, the process 1-process 4 are furnace bottom separation processes, and process 5-process 8 are furnace bottom carrying-out processes, and it demonstrates based on drawing.

(Furnace bottom separation process)

In FIG. 2B, the horizontal cut part 49 is previously set in the foundation concrete 11 below the support beam 12 of the furnace bottom part 36, and the extraction direction of the furnace bottom part 36 is subsequently drawn out to the said cut part 49. FIG. A plurality of cut sections are set in parallel with each other (step 1).

One form of the cutting | disconnection division set in FIG. 3 is shown.

In FIG. 3, in the horizontal cut part 49 formed in the foundation concrete 11, 10 cutting divisions 68a-68j (base concrete 11) (parallel parallel to the direction (left-right direction) which horizontally move a furnace bottom part ( Or base grout is divided into wire saws 70 (ranges cut into wires 70a to 70j).

The width of the cut section is appropriately set in consideration of the size and weight of the bottom of the furnace. 450-5000 mm is preferable. In addition, the width | variety of the said cut | disconnection division | part does not need to be constant, You may set suitably in consideration of the weight distribution of a furnace bottom part.

Using a perforator (not shown) for the cutting section 68a and the border 69a at the ends, the borders 69b to 69j for the cutting sections 68a to 68j, and the cutting section 68j and the border 69k at the ends. A horizontal hole of a predetermined diameter is drilled (step 2). The diameter of the horizontal hole is appropriately set in consideration of the ease of the cutting operation by the subsequent wire saw and the sufficient height for inserting and placing the transverse means in the gap formed by the cutting. Mm is preferred.

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 it can be inserted, the horizontal cutting of the two upper and lower surfaces is impossible. In addition, when the diameter exceeds 200 mm, it is difficult to drill a horizontal hole of a long distance (for example, about 20 m), and wastes a lot of time for the opening operation by the punching machine, and increases the diameter of the horizontal hole functionally. There is no meaning.

Adjacent intervals of the horizontal holes are appropriately set in consideration of the size, weight of the furnace bottom, the area of the foundation concrete, and the like, but preferably 0.45 to 5 m. If the adjacent spacing of the horizontal holes is less than 0.45 m, the resistance in the return portion when the wire saw 70 is rotated is large, so that the foundation concrete cannot be cut. If the adjacent spacing of the horizontal holes exceeds 5 m, the upper and lower cut surfaces are wavy. It becomes difficult to cut the foundation concrete horizontally.

Even if it is possible to cut, the unevenness of the cut surface becomes an obstacle, and the friction at the time of pulling out becomes large, making it difficult to discharge the cut base concrete out of the system, and the frictional resistance when lateral movement of the blast furnace bottom also increases, Export of the bottom becomes very difficult. For example, in the case of the bottom of a furnace whose weight exceeds 4000t, it cannot carry out.

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

Inserting the wires 70a to 70j of the wire saws 70 into the horizontal holes drilled in the respective boundary portions to arrange the foundation concrete remaining in the cutting section 68a to 68j by inserting a predetermined height interval, i.e., transverse movement means. Cut along the upper horizontal plane 47 and the lower horizontal plane 48 (see FIG. 2B) to ensure sufficient height clearance (step 3), and drain the foundation concrete of the cut to form the void 56 (see FIG. 2B). (Step 4).

In the dismantling method described in Patent Literature 4, after applying the release material to the cut surfaces 47 and 48 of the void portion 56, the grout material 25 is filled between the cut surfaces 47 and 48, and the furnace bottom portion 36 is Although it raises and arrange | positions a lateral movement means (for example, a sliding member) on the cutting surface 48, in the method of this invention, it is not necessary to fill grout material as mentioned later, and also to raise the furnace bottom part 36. There is no need, and the transverse means is arranged in the gap 56.

When the foundation concrete of a large blast furnace is cut along the upper horizontal plane and the lower horizontal plane, a wire guide member for guiding the movement of the wire saw 70 is disposed in the horizontal hole so that the upper and lower cutting planes do not wave in an uneven shape, or the upper and lower cutting planes. It is preferable to cut | disconnect so that the space | interval of may change.

When the wire guide member is disposed in the horizontal hole, the wire of the wire saw 70 cuts the base concrete while sliding the upper surface of the wire guide member, so that the upper and lower cut surfaces become horizontal planes while maintaining a predetermined height interval. As a result, the resistance in the foundation concrete cut surface at the time of carrying out a blast furnace furnace bottom becomes small, and it is possible to carry out a blast furnace furnace bottom smoothly.

Here, the cross-sectional form of the wire guide member comprised using H-shaped steel in FIG. 11 and FIG. 12 is shown.

The wire guide member shown in FIG. 11 attaches the roller 42 which supports the wire guide member 40 to the front-end | tip and center part of the lower flange 38 of the H-beam 37. As shown in FIG. The roller 42 is attached to the tip and center of the lower flange 38 of the H-beam 37 to facilitate the insertion and withdrawal of the wire guide member 40 into the horizontal hole 41.

The wire guide member 40 shown in FIG. 12 attaches the roller 42 which contacts the side surface of the horizontal hole 41 to the left and right of the front-end | tip and center part of the web 43 of H-shaped steel 37. As shown in FIG.

In any wire guide member, the upper flange 39 guides the wire saw 70 for cutting the upper basic concrete, and the lower flange 38 guides the wire saw 70 for cutting the lower basic concrete. The cut surface becomes a horizontal plane 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, which causes the horizontal cut 49 to be cut. Formed (two sides cut).

Moreover, you may use together the attachment form of the roller 42 shown in FIG. 11 and FIG.

Although the height space | interval which cut | disconnects with a wire saw, ie, the height of a space | gap part may be set suitably in consideration of the diameter of a horizontal hole, and the height of the said horizontal movement means, 60-200 mm is preferable.

In the case of drilling the horizontal hole, there is no particular order for the drilling work, but the order of the cutting and the discharging work of the foundation concrete in the drilling of the horizontal hole and the cutting division may be determined.

Since horizontal movement means are arrange | positioned over the whole area of the horizontal cut part 49 set to the base concrete of the furnace bottom part (refer FIG. 3) (process 7), the horizontal hole in the boundary part 69a-69k of a cut | disconnection division Although the perforations and the cutting of the foundation concrete of the cutting divisions 68a to 68j are repeatedly performed (steps 2 to 6, or steps 3 to 6), when performing the drilling and cutting operations from one direction (for example, For example, it may be performed sequentially from 68a to 68j, but it is more preferable to select non-adjacent cutting divisions regularly and carry out them continuously.

For example, as shown in FIG. 4, first, the cut section of 68e is cut (1 in the drawing), and then the cut section of 68a and 68j is cut simultaneously (2 in the drawing), followed by the cut section of 68c and 68g. Are cut simultaneously (3 in the drawing), and finally the remaining cut segments are cut simultaneously (4 in the drawing).

By regularly selecting and carrying out the drilling and cutting work in this way, the deflection of the load distribution in the foundation concrete can be suppressed, so that the load of the furnace body is almost evenly loaded on the lateral moving means, so that the work of carrying out the blast furnace bottom is made smoother. .

(Furnace bottom part export process)

The transverse means is disposed in the gap 56 (see Fig. 2B) (step 6). And the horizontal movement member described below over the whole area | region of the horizontal cut part 49 set to the base concrete of the blast furnace furnace bottom part by performing process 2-process 6, or process 3-process 6 repeatedly, and The horizontal movement means provided with a furnace load support member is arrange | positioned (step 7).

In the lateral movement means, the lateral movement member may use a configuration in which one or more sliding plates are stacked on one pallet.

In the lateral movement means, the furnace load supporting member mounted on the lateral movement member is, for example, a single arrangement of HPA (high pack anchor, fibrous bag filled with mortar), HPA and α material (garnet, Combinations of small spherical particles, one or two or more kinds of mortars), and an arrangement of α materials only.

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When using a pallet and a sliding plate mounted thereon as a lateral movement member, any one of HPA alone, a combination of HPA and an α material, and an α material alone can be appropriately selected as the furnace load supporting member.

When using HPA as a body load bearing member, it is preferable to take measures regarding the fluidity when filling mortar in HPA.

Specifically, coating the inner surface of the HPA (Action A), immersing the HPA in water before filling the mortar (Action B), or using a pipe that does not generate a sudden tightening part in the mortar flow path ( Countermeasures C) are mentioned.

Measure A smoothes the flow of mortar in the HPA. In the absence of a coating, the mortar may stick to the HPA to remain, or may form agglomerates to prevent the smooth filling of the mortar. However, the countermeasure A can avoid the retention of mortar or the formation of lumps, so that smooth filling into the HPA becomes possible.

Countermeasure B makes it difficult to separate water from the mortar filled in the HPA. If moisture is separated from the mortar introduced into the HPA, the mortar will retain or agglomerate in the HPA, but these can be suppressed by the countermeasure B so that smooth filling can be performed.

Regarding the countermeasure C, if there is a portion where the flow passage area narrows rapidly, such as a pipe leading to the HPA, mortar stays easily. In such a site, rapid tightening can be eliminated by using a gentle conical guide pipe, for example, and mortar can be prevented.

These measures will be described again in the Examples.

In FIG. 5, one slide plate 45 is mounted on one pallet 44 as a lateral movement member, and the HPA 51a and the α material 51b are arranged in combination to serve as a furnace load supporting member. The form of the moving means 53 is shown. As a pallet, a steel plate (SS material) is suitable, and as a slip plate, a single layer of SUS material or a multilayer structure of SUS material and SS material is suitable.

If the pallet and the slip plate are the same material in the lateral moving member, slip resistance due to abrasion is likely to occur between the two plates during the lateral movement of the blast furnace bottom portion, thereby requiring a large horizontal force during the lateral movement. Therefore, the material of the two plates is preferably made of a different material.

As an application example, the multilayer structure which consists of 1. pallet SS material, slip board SUS material, 2. pallet SS material, and slip board SUS material (lower surface) + SS material (upper surface) is mentioned.

In this case, in any case, since the slip plate SUS material is worn between the pallet SS material and the slip plate SUS material which slides with each other during the lateral movement of the blast furnace furnace bottom portion, the above-mentioned wear does not occur, and hence the horizontal force is reduced.

In addition, by making the sliding plate have a multilayer structure composed of SUS material (lower surface) + SS material (upper surface) as described above, it is possible to make it cheaper than a single layer of SUS material having the same thickness.

Pallets laid on the bottom of a horizontal hole having a concave-convex surface formed of a wire of a wire saw are locally subjected to the furnace load through the furnace load supporting member. Therefore, the thickness of the pallet is set so that the pallet can secure sufficient strength to withstand its local load. For example, 6 mm or more is preferable. Since the thickness of the sliding plate does not need to be about the strength of the pallet, for example, a steel plate of 2.3 mm or more is sufficient for the sliding plate of the steel sheet.

In the configuration of FIG. 5, one pallet and one slip plate are used, but the lateral movement member may be configured by arranging two or more slip plates on one pallet. In this case, when a groove is formed in the upper surface of the pallet, and the groove is filled with lubricant from outside the system, the slip between the pallet and the slip plate becomes smoother.

In addition, you may use only one pallet as a horizontal movement member. In this case, however, when the HPA alone or the HPA + α material is loaded as the load-bearing member on the pallet, the HPA may be damaged during lateral movement. Therefore, when only one pallet is used as the lateral movement member, the HPA alone and the HPA + α material are not suitable as the furnace load supporting member, and it is preferable to use only the α material.

When the α material is used as the body load supporting member, it is preferable to fill the α material with the gap between the upper surface of the pallet and the cut surface so as to be in a consolidated state. In this case, however, it is easy to arrange the lateral movement member and the load bearing member into the air gap, but since only a small lubrication action is obtained, the traction force is increased when the lateral movement of the bottom of the blast furnace is required. It becomes necessary.

On the other hand, when arranging one or more sliding plates on one pallet as a transverse member, the construction to the space | gap becomes more complicated compared with the case of using alpha material, but HPA alone, HPA + α material, And both α materials can be used. In this case, the frictional resistance value is so small that the traction force during lateral movement of the furnace bottom may be very small, so that a traction device having a small capacity is sufficient.

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

As described above, in the horizontal movement means used by laminating the pallet and the slip plate as the transverse member, it is preferable to smooth the sliding of the slip plate against the pallet by filling a lubricant between these pallets and the slip plate.

As shown in FIG. 6, the lubricant 55 (for example, oil) may be supplied to the pump P between the pallet 44 and the slip plate using the pallet 44 having the grooves 54 formed therein. . Filling the lubricating material between the pallet and the slippering plate allows for smoother, safer and faster removal of the blast furnace bottom.

7A to 7C show various forms of the lateral movement means.

Fig. 7A shows a form using α material 51b (garnet, spherical particles having a small particle diameter, or one or two or more kinds of mortars) as the furnace load supporting member.

Fig. 7B shows a form in which the α material 51b is filled and used between the HPA 51a and it.

7C shows a form using only the HPA 51a.

As mentioned above, as a furnace load bearing member, you may use any 1 type or 2 types of alpha material and HPA in combination.

Which furnace load bearing member is selected is determined appropriately according to the difficulty of the construction. For example, when the gap between the pallet and the upper surface of the gap portion is small and mortar and HPA cannot be disposed on the transverse member as the load-bearing member, it is preferable to use spherical particles of garnet or small particle size.

As mentioned above, after arrange | positioning the horizontal movement means to the space | gap part 56 (refer FIG. 2B) of the foundation concrete 11 (step 6, process 7), the upper mantle 34 isolate | separated from the blast furnace furnace bottom is pulled up, The blast furnace furnace bottom part 36 is carried out to the outer side (outside of the furnace body 14) (process 8).

8, the carrying out form of a blast furnace furnace bottom part is shown.

The upper mantle is separated, for example, as follows.

After arranging the transverse means including the transverse member and the load-bearing member throughout the horizontal cutout 49, the blast furnace 10 is stopped, and the upper to the middle of the shells 29 of the blast furnace body 13 are disposed. A plurality of center hole jacks 50 are attached to the furnace body 14 to fix the blast furnace 10 by pulling down the blast furnace 10 and the center while welding and fixing the lowering bracket 52 at a plurality of locations, respectively. It is pulled down and supported by the furnace body 14 through the hole jack 50.

Subsequently, an intermediate portion of the blast furnace furnace body 13, for example, a portion below the level of the annular tube 16 of the blast furnace furnace body 13 (cut line C1 in FIG. 8) and one intermediate portion of the blast furnace furnace body 13. To a plurality of portions (cut line C2 in FIG. 8) are cut substantially horizontally to a predetermined width, and the upper mantle 34 is separated from the nodling mantle 35, and the upper mantle 34 is divided into a plurality of blocks. .

At this time, each block of the divided upper mantle 34 is pulled down and maintained in the furnace body 14 by the pulling bracket 52 and the center hole jack 50, respectively.

After the upper mantle 34 is maintained in the furnace passage 14 in this way, the blast furnace furnace bottom part 36 which contains the furnace mantle 35 is first carried out to the outer side (outside of the furnace passage 14).

Subsequently, the center hole jack 50 which pulls down the lowermost block of the upper mantle 34 is operated, and the copper block is suspended on an unloading device (for example, a roller, a slip plate, a bogie, etc.) installed on the foundation. In the same way as the furnace bottom portion 36, the furnace is carried out to the furnace body.

Similarly, each block of the upper mantle 34 is sequentially taken out from the bottom, and all of the upper mantle 34 is taken out.

As a result, the blast furnace main body 13 is carried out to the furnace body.

In addition, the top equipment such as the charging device 19 is dismantled and dismantled using the top outrigger crane 17 and the temporary projecting deck 18.

In carrying out these, construction machines, such as a dolly and a crane car, may be used, semi-fixed facilities, such as a conveyor, may be installed, or they may be used in combination.

Here, FIG. 9 and FIG. 10 show the form just before carrying out when a pallet and a slip board are used as a horizontal member of a horizontal moving means. Fig. 9 shows the side shape thereof and Fig. 10 shows the plane shape thereof.

The heavy material conveyance trolley 57 is provided adjacent to the foundation concrete 11, and the pallet 44 arrange | positioned at the space | gap part of the foundation concrete 11 is extended and arrange | positioned on the upper surface of the said heavy weight conveyance trolley 57. . In this state, the blast furnace furnace bottom part 36 is pulled out of the heavy material conveying cart 57 by pulling the traction wire 59 which the one end was fastened to the bracket 60 fixed to the blast furnace furnace bottom part 36 by the jack 58. As shown in FIG. Transverse to the upper surface.

At this time, it is necessary to prevent sideways slippage in the traction direction of the blast furnace furnace section 36. In order to reliably prevent the sideways slippage, for example, the lateral movement guide member 61 shown in FIG. You may arrange in all or one part of the hole 41.

By using this lateral movement guide member, the bottom of the blast furnace does not slide sideways in the traction direction, and it can be safely, smoothly and quickly taken out.

As another method of preventing side slipping, a guide rail may be provided outside the noser mantle to prevent side slipping.

Arrangement of the lateral movement guide member into the space | gap part may be performed immediately after lifting up the upper mantle separated from the blast furnace furnace bottom part, and may be performed with arrangement of the lateral movement means. As a lateral movement guide member, a steel pipe is normally preferable.

(Other Embodiments)

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to embodiment mentioned above, The material of each part, number of elements, arrangement | positioning, etc. may change suitably at the time of implementation, and the objective of this invention can be achieved. Modifications within the range that can be included are included in the present invention.

In the above-mentioned embodiment, although the horizontal cut part 49 of the furnace bottom part 36 was cut into two surfaces by the upper horizontal surface 47 and the lower horizontal surface 48 (refer FIG. 2B, FIG. 12, FIG. 13), As described in the above, it may be a three-sided cut or a four-sided cut.

As mentioned above, in the cutting by the wire saw 70, the cut surface becomes uneven | corrugated by the vibration of the middle part of the wire saw 70 which drives rotation, the load of a blast furnace main body, etc.

In FIG. 14, the upper horizontal surface 47 and the lower horizontal surface 48 are formed by the cutting by the wire saw 70, and the cutting part 36A between them can be taken out in a horizontal direction. Surfaces 47A and 48A of the cut portion 36A are formed by cutting by the wire saw 70 as well as the upper horizontal surface 47 and the lower horizontal surface 48, and the upper horizontal surface 47 and the lower horizontal surface 48 ) Is a concave-convex shape forming a predetermined interval (corresponding to the thickness of the wire saw 70).

When the cutout portion 36A is pulled out in the horizontal direction, the convex portions 47B and 48B of the surfaces 47A and 48A of the cutout portion 36A become convex portions 47C, of the upper horizontal surface 47 and the lower horizontal surface 48. Interference with 48C) may make it difficult to withdraw.

In particular, when the adjacent distance between the horizontal holes 41 to be drilled first is large (5 m or more), the vibration width of the wire saw 70 also becomes large, so that the unevenness and the upper horizontal surface 47 of the surfaces 47A and 48A of the cut portion 36A are increased. It is not preferable because the unevenness of the lower horizontal surface 48 becomes large and the interference in the drawing in the horizontal direction is large, so that the output power needs to be strengthened.

In contrast, the above-described interference can be greatly reduced by performing three-sided cutting as shown in FIGS. 15A to 15E. In addition, in the following process, FIGS. 15A-15C are the same as the above-mentioned two-sided cutting, and three-sided cutting is implement | achieved by adding FIG. 15D and FIG. 15E.

First, as shown to FIG. 15A, the wire guide member 40 using the H-shaped steel 37 similar to the said embodiment was introduce | transduced into the horizontal hole 41 of the furnace bottom part 36, and the wire saw 70 was connected. Cutting is performed while guiding to the upper flange 39. Due to this, the furnace bottom 36 is cut into the upper horizontal plane 47.

Next, as shown in FIG. 15B, cutting is performed, guiding the wire saw 70 to the lower flange 38. Next, as shown in FIG. For this reason, the furnace bottom part 36 is cut | disconnected by the lower horizontal surface 48, and the area | region sandwiched by these upper horizontal surface 47 and the lower horizontal surface 48 is cut | disconnected as cutting part 36A.

These cuts create a gap of thickness D1 as a cut trace by the wire saw 70 guided by the upper flange 39 between the furnace bottom 36 and the cut portion 36A, and into the lower flange 38. A gap of thickness D2 occurs as a cut trace by the guided wire saw 70.

As shown in Fig. 15C, the cut portion 36A that is not supported by the cut is settled by gravity, and the gap D3 is formed only on the upper side of the cut portion 36A. The gap D3 corresponds to the distance obtained by summing the gap D1 and the gap D2 described above.

In this state, the wire guide member 40 is pulled out. By the processing so far, two-sided cuts corresponding to the above-described embodiments are performed.

Next, as shown in FIG. 15D, another wire guide member 40A is introduced into the horizontal hole 41.

40 A of wire guide members are equipped with the guide plates 40B and 40C and the anti-floating plate 40D. These guide plates 40B and 40C and the anti-floating plate 40D are each formed of a steel plate, and in the cross-sectional shape, the guide plates 40B and 40C are parallel to each other, and the anti-floating plate 40D is the guide plate 40B, It is arrange | positioned at right angle with respect to 40C).

In the state where the wire guide member 40A is installed in the horizontal hole 41, the guide plates 40B and 40C are horizontal, and the anti-floating plate 40D is kept vertical. The upper guide plate 40B of the lower side is arrange | positioned in the substantially middle (slightly lower side than middle) of cut | disconnected part 36A, and guides the wire saw 70 to this height from this upper surface. The upper guide plate 40C restricts the movement so that the lower surface thereof is lower than the upper surface of the cut portion 36A so that the wire saw 70 does not escape from the cut portion 36A even when vibration occurs. The anti-floating plate 40D is in contact with the upper inner surface of the horizontal hole 41 to prevent the injuries of the wire guide member 40A, and by maintaining the guide plates 40B and 40C at a predetermined height in the horizontal hole 41. The guide function of the wire saw 70 by the guide plates 40B and 40C mentioned above is appropriately maintained.

By cutting while guiding the wire saw 70 with such a wire guide member 40A, the cut portion 36A is cut into the middle horizontal plane 49A. By this cutting | disconnection, 36 A of cut | disconnected parts are divided into the upper part 36B and the lower part 36C, and the space | interval of thickness D4 is created between them as a cutting trace by the wire saw 70. FIG.

As shown in Fig. 15E, in the cut portion 36A, the upper portion 36B, which is not supported by the cutting, is settled by gravity, overlaps with the lower portion 36C, and only has a gap (above the upper portion of the cut portion 36A). D5) occurs. The gap D5 corresponds to the distance obtained by summing the gap D3 and the gap D4 described above, that is, the distance D1, D2, and D4 of three cutting marks.

In this state, the wire guide member 40A is pulled out. Three-sided cutting | disconnection is performed by the process to here, and the clearance gap D5 larger than the two-sided cut mentioned above is obtained. For this reason, even when there is an unevenness in the upper horizontal surface 47 and the lower horizontal surface 48, the interference at the time of withdrawal can be avoided by the large gap D5, and the withdrawal of the cut portion 36A can be performed smoothly.

(Example)

EMBODIMENT OF THE INVENTION Hereinafter, the specific Example based on embodiment of this invention mentioned above is demonstrated.

The bottom of the blast furnace furnace installed on the foundation concrete of 21 m x 21 m was carried out out of the system using the horizontal movement means shown in FIG.

The position of 1.5 m below the furnace bottom part was made into the horizontal cut part, and 13 cut divisions of width 1.5 m were set to the said cut part. A horizontal hole having a diameter of 100 mm was drilled at the boundary of the cut section, and the foundation concrete between the horizontal holes was cut horizontally at a height interval of 70 mm to discharge the foundation concrete of the cut portion.

Here, the horizontal movement means shown in FIG. 5 mentioned above was arrange | positioned and the furnace bottom part was carried out. As a result, 13 days was performed from blast furnace ejection to completion of carrying out of a furnace bottom part.

The number of working days is significantly shortened compared to 17 working days, which required the removal of the bottom of the furnace of the same size.

The conditions of the above embodiment are one example of conditions used to confirm the feasibility and effect of the present invention, and the present invention is not limited to this example of one condition. This invention can employ | adopt various conditions, as long as the objective of this invention is achieved without deviating from the summary of this invention.

(Example of mortar filling with HPA)

In the above-mentioned embodiment, when using HPA as a furnace load bearing member, it was explained that it is preferable to take the measures regarding the fluidity | liquidity of the mortar to fill in HPA.

Here, specific examples of each countermeasure will be described.

(1) test device

The structure shown in FIG. 5 mentioned above, namely, one slide plate 45 is mounted on one pallet 44 as a horizontal movement member, and HPA 51a and alpha material 51b are placed thereon as a body load support member. The horizontal movement means 53 constructed by combining and using was used.

Six HPAs 51a are provided, each having a tubular shape formed of laminated fibers, and the length of the horizontal portion is about 18 m.

In order to charge mortar to this HPA 51a, a mortar filling pipe was connected to one end thereof.

As shown in FIG. 16, the piping 51c for mortar filling arrange | positions the piping of 50 A of diameters in a vertical direction, and fills an uncondensed mortar using the 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 of the HPA 51a is drawn out from the furnace bottom 36, is covered by the lower end of the pipe 51c, and fixed by the fastening band 51d.

In this configuration, when the mortar was filled from the pipe 51c and the mortar flowed out from the other end of the HPA 51a, it was determined that the filling to the HPA 51a was sufficiently performed.

(2) test conditions

Six examples were examined in combination with the countermeasures (measures A to C) described in the above embodiments.

Example 1; No measures A, no measures B, no measures C ... There is no measures

Example 2; No action A, no action B, no action C. ... Only measures A

Example 3; No measures A, no measures B implementation, no measures C. ... Only measures B

Example 4; No measures A, no measures B, and measures C. ... Only measures C

Example 5; Take measures A, do not take measures B, take measures C. ... Measure C + measures A

Example 6; No measures A, measures B implementation, measures C implementation. ... Measure C + measures B

Here, the content of each countermeasure is as follows. Coating the inner surface of HPA (Action A), immersing HPA in water before filling the mortar (Action B), or using piping that does not produce a sudden tightening in the mortar flow path (Action C).

Among these, measures C are as follows.

In the above-described configuration (without countermeasure C) in FIG. 16, the mortar introduced into the HPA 51a from the pipe 51c of the aperture 50A is subjected to rapid tightening when introduced into the furnace bottom 36.

As shown in FIG. 17, the part introduced into HPA 51a from piping 51c as a countermeasure C is provided with a gentle fastening pipe 51e, and piping 51c is also changed to a thinner diameter 32A. have.

The tightening pipe 51e is a pipe 32c of the proximal end, is connected to the end of the pipe 51c, and becomes a narrow tube at the distal end side, and the HPA 51a in the furnace bottom 36 over a length of 100 mm. It is inserted inside. The tip end and the proximal end of the tightening pipe 51e have a very smooth cone shape, and the mortar from the pipe 51c is tightened very gently to be introduced into the HPA 51a.

(3) test result

Example 1; No measures.

There was no mortar outflow from any outlet of the HPA 51a (the end opposite to the inlet side for injecting mortar), and the mortar filling was insufficient. It is presumed that the moisture of the mortar was compressed through the HPA at the rapid tightening portion of the HPA 51a inlet to form a lump of mortar and prevented the flow.

Example 2; Only measures A.

Example 3; Only measures B.

There was no mortar outflow from the outlet of any HPA 51a, and the mortar filling was insufficient. As described in Example 1, it is presumed that in the sudden tightening portion of the HPA 51a inlet, the moisture of the mortar was squeezed through the HPA to form a lump of mortar and prevented the flow. For this reason, mortar did not introduce into HPA 51a, and the measures A and B did not function effectively.

Example 4; Measure C only.

Outflow of mortar was confirmed from the exit of each HPA 51a. The countermeasure C is presumably because there is no water squeezing of the mortar, no clumping of the mortar, and no flow closure occurs.

Example 5; Countermeasures C + Countermeasures A.

Example 6; Countermeasures C + Countermeasures B.

More mortar outflow was confirmed from the outlet of each HPA 51a. In addition to the elimination of the closing by the countermeasure C described in the fourth embodiment, it is presumed that the countermeasure A or the countermeasure B suppressed the water compression of the mortar over the entire length of the HPA 51a.

As mentioned above, when using HPA as a body load support member, it was preferable to use the countermeasure C mentioned above, and it was further found that it is more preferable to use measures A and B together.

The present invention can be used as a method of dismantling the blast furnace furnace bottom for dismantling the furnace bottom in a short time in the number of blast furnaces.

Claims (15)

As a method of dismantling the blast furnace furnace bottom, which is carried out by separating the blast furnace furnace bottom from the base concrete or base grout located below the blast furnace furnace bottom: By using a lateral movement means composed of a pallet and a sliding plate, and having a lateral movement member for carrying out the blast furnace furnace bottom portion and a furnace load supporting member for supporting the furnace load, The following steps 1 to 7 are performed in advance during the operation of the blast furnace, and then the following step 8 is performed during the repair period after the blast furnace ejection. Process 1: The cutting part parallel to the drawing direction of the blast furnace furnace bottom part is set in multiple horizontal cut | disconnecting parts set to the foundation concrete or base grout located under the blast furnace furnace bottom part to carry out. Step 2: A horizontal hole parallel and adjacent to each other in the drawing direction is drilled in the foundation concrete or base grout at the boundary of the cut section. Step 3: The wire of the wire saw is inserted into the horizontal holes adjacent to each other, and the foundation concrete of the cut section is cut along the upper horizontal plane and the lower horizontal plane to maintain the required height. Step 4: The cut base concrete or the base grout between the upper horizontal plane and the lower horizontal plane is discharged to form the voids parallel to the drawing direction. Step 5: The lateral movement member is disposed with the slip plate facing upward in the gap. Step 6: The furnace body load supporting member is disposed in the 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 to arrange the lateral movement means over the entire horizontal cut portion set in the foundation concrete or base grout. Step 8: The upper mantle is separated from the bottom of the furnace, pulled up to fix it, and then a horizontal force is applied to the bottom of the furnace, and the pallet and the sliding plate are made to slide, and the blast furnace furnace bottom to the slip plate is taken out of the system. The method of disassembling the blast furnace furnace bottom according to claim 1, wherein a transverse guide member is disposed in all or part of the horizontal holes to prevent side sliding in the traction direction during the transverse movement. The wire saw member of claim 1, wherein the wire guide member is disposed in the horizontal hole to maintain a constant wire level of the wire saw, and the wire saw wire is inserted along the guide member of the horizontal hole. A method for dismantling a blast furnace bottom, characterized in that the foundation concrete or the base grout is cut along the upper horizontal plane and the lower horizontal plane to maintain the required height. 4. The blast furnace bottom portion according to claim 3, characterized in that a lateral movement guide member is disposed in all or part of the horizontal holes after the wire guide member is discharged to prevent side sliding in the traction direction during lateral movement. Dismantling method. 4. The method of disassembling the blast furnace bottom according to claim 3, wherein the wire guide member is a long steel having a tip in a carrying-in direction to a horizontal hole and a roller at the tip and the center. The method of disassembling the blast furnace furnace bottom according to claim 1, wherein the horizontal hole has a diameter of 60 to 200 mm. The method of disassembling the blast furnace furnace bottom according to claim 1, wherein the adjacent intervals of the horizontal holes are 0.45 to 5 m. The blast furnace furnace bottom according to any one of claims 1 to 7, wherein the furnace load supporting member is composed of one or a combination of two or more of a garnet, a spherical particle having a small particle diameter, and a mortar. Dismantling method. 8. The method for dismantling a blast furnace bottom according to any one of claims 1 to 7, wherein the lateral movement member is composed of a pallet, a slip plate, and a lubricant filled between the pallet and the slip plate. 10. The method of disassembling the bottom of a blast furnace according to claim 9, wherein the total number of the pallet and the slip plate is two or more. 10. The method of disassembling the blast furnace furnace bottom according to claim 9, wherein lubricant is supplied from outside the system to the sliding surface between the pallet and the slip plate. The blast furnace furnace bottom according to claim 9, wherein the furnace load supporting member is composed of a garnet, a spherical particle having a small particle diameter, a mortar, or a combination of two or more kinds thereof, and a high pack anchor (HPA). Dismantling method. 9. The method for dismantling a blast furnace bottom according to claim 8, wherein the spherical particles having a small particle diameter are spherical or elliptical iron balls having a maximum diameter of 10 mm or less. 13. The method for dismantling a blast furnace bottom according to claim 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. The method according to any one of claims 1 to 7, wherein when the steps 2 to 6 or the steps 3 to 6 are repeatedly performed, the non-adjacent cutting division is appropriately selected and continuously performed. How to dismantle the bottom of the furnace.

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