JP2009041062A - Method for disassembling hot-blast stove for blast furnace and constructing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for disassembling a hot-blast stove for a blast furnace, which can simultaneously disassemble a regenerator and a combustion chamber, and does not necessitate an operation of cutting a connecting pipe which connects the regenerator with the combustion chamber at a high place. <P>SOLUTION: This disassembling method includes the steps of: (a) cutting a base part 2A of the regenerator 2; (b) lifting the regenerator 2 which is the upper part of the base part 2A with a jack device 6; (c) moving a movable carriage 9 for the regenerator onto the base part 2A; (d) hanging and lowering the regenerator 2 onto the movable carriage 9; (e) cutting the regenerator 2 into ring-shaped blocks; (f) lifting the regenerator 2 with the jack device 6; (g) moving the ring-shaped block to the outside of a temporarily provided frame 4 for the regenerator with the movable carriage 9; (h) carrying the ring-shaped block out of the movable carriage 9 and returning the movable carriage 9 onto the base part 2A; (i) hanging and lowering the regenerator 2 on the movable carriage 9 with the jack device 6; and (j) repeating the above steps, then cutting the connecting pipe 12, and carrying the regenerator 2 and the combustion chamber 3 out. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention can dismantle or construct a blast furnace hot blast furnace, in particular, a heat storage chamber and a combustion chamber at the same time, so that the disassembly or construction period can be greatly shortened, and the hot stove It is related with the dismantling and construction method of a hot blast furnace for blast furnaces which does not need to perform the cutting | disconnection or connection work of the connecting pipe which connects the thermal storage chamber and combustion chamber which comprise.

  A hot stove equipped with a heat storage chamber and a combustion chamber is a furnace that creates hot air to be fed into the furnace from the tuyere's tuyeres, and a plurality of hot blast furnaces are provided for one blast furnace. Repeat the state of heat storage) and blowing (ventilation).

  Conventionally, dismantling hot blast furnaces with a height of several tens of meters has been done using large cranes, but if there is no space for large cranes around the hot air furnace, dismantle them using other dismantling methods. I had to.

  Therefore, development of a demolition method for a hot blast furnace for a blast furnace that can be disassembled safely and in a short construction period without using a large crane has been strongly desired.

  Also, in the case of constructing a hot blast furnace, development of a construction method for a blast furnace hot stove that can be constructed safely and in a short construction period without using a large crane as in the case of dismantling has been strongly desired.

  Patent Document 1 (Japanese Patent Laid-Open No. 2000-319709) discloses a blast furnace repair / construction method that does not use a large crane.

  This conventional method consists of the following steps.

  First, as shown in FIG. 12, a gantry 33 is constructed below the support pillar 32 of the furnace body 31 of the blast furnace, and the furnace body 31 is cut into a plurality of ring-shaped blocks (A) to (F). The height of the lowermost ring-shaped block (F) and the height of the gantry 33 are equal. Next, as shown in FIG. 13, after the furnace body 31 above the ring-shaped block (F) is lifted by the jack 34 installed on the support pillar 32, it extends over the base 33 and the lower part of the ring-shaped block (E). Rail 35 is laid. Next, after the carriage 36 traveling on the rail 35 is moved below the ring-shaped block (E), the furnace body 31 is suspended and placed on the carriage 36. Next, as shown in FIG. 14, the upper furnace body 31 is lifted by the jack 34 from the ring-shaped block (E). Next, the ring-shaped block (E) is moved onto the gantry 33 by the carriage 36 and is carried out by being cut into a plurality of blocks.

  The furnace body 31 is disassembled by repeating the above steps for the ring blocks (D) to (A). Note that the lowermost ring-shaped block (F) is disassembled into a plurality of blocks and conveyed without being moved by the carriage 36.

  The above is the case where the blast furnace is dismantled, but when constructing the blast furnace, the procedure is reverse to the above procedure.

JP 2000-319709 A

  If the above conventional method is applied to the dismantling of the hot stove, the hot stove can be dismantled without using a large crane, but the hot stove has a heat storage chamber and a combustion chamber, so two furnaces It is the same as dismantling the body, and basically it takes twice as much time to dismantle. Similarly, in the case of constructing a hot stove, the construction period is basically doubled.

  Moreover, the top part of the heat storage chamber and the combustion chamber is connected by a connecting pipe, and the connecting pipe cutting work when disassembling the hot stove or the connecting pipe connecting work when constructing the hot stove is an aerial work. Therefore, in any case, it is not only necessary to build a large scaffold, but it is also dangerous.

  Accordingly, an object of the present invention is to disassemble or construct the heat storage chamber and the combustion chamber at the same time, so that the disassembly or construction period of the hot stove can be greatly shortened, and the heat storage chamber constituting the hot stove It is an object of the present invention to provide a dismantling and construction method for a hot blast furnace for a blast furnace that does not require cutting or connecting work of a connecting pipe that connects the combustion chamber and the combustion chamber at a high place.

  Accordingly, the inventors of the present application have made extensive studies in order to obtain a hot stove dismantling and construction method capable of disassembling or constructing a hot stove safely and in a short period of time. As a result, if a jack that can lift and suspend the heat storage chamber and combustion chamber of a super-heavy hot stove in precise synchronization is used, the heat storage chamber and combustion chamber can be disassembled or constructed at the same time. The dismantling or construction period of the hot stove can be greatly shortened. Moreover, since the heat storage chamber and the combustion chamber can be lifted or hung at the same time, it has been found that it is not necessary to disconnect or connect the connecting pipe between the heat storage chamber and the combustion chamber at a high place.

  The present invention has been made on the basis of the above findings, and is characterized by the following.

The invention according to claim 1 includes a heat storage chamber and a combustion chamber, wherein the top portion of the heat storage chamber and the top portion of the combustion chamber are connected by a connecting pipe in the demolition method for a hot blast furnace for a blast furnace. Elevating devices are installed in the frame for the heat storage chamber and the combustion chamber around the combustion chamber, and a moving carriage for the heat storage chamber and the combustion chamber is installed below the frame for the heat storage chamber and the combustion chamber. Steps (a) to (k);
(A) cutting the base of the heat storage chamber;
(B) a step of lifting the heat storage chamber above the base together with the combustion chamber by the lifting device;
(C) a step of moving the heat storage chamber moving carriage on the base;
(D) suspending the suspended heat storage chamber together with the combustion chamber on the heat storage chamber moving carriage by the lifting device;
(E) cutting the heat storage chamber on the heat storage chamber moving carriage into ring-shaped blocks;
(F) a step of lifting the heat storage chamber on the ring-shaped block together with the combustion chamber by the lifting device;
(G) a step of moving the ring-shaped block outside the frame for the heat storage chamber by the moving cart for the heat storage chamber;
(H) a step of returning the ring-shaped block from the heat storage chamber moving carriage and then returning the heat storage chamber movement carriage onto the base;
(I) a step of suspending the heat storage chamber together with the combustion chamber on the heat storage chamber moving carriage by the lifting device;
(J) repeatedly performing the above steps until the tops of the heat storage chamber and the combustion chamber are on the frame for the heat storage chamber and the combustion chamber, and then cutting the connecting pipe;
(K) The heat storage chamber and the combustion chamber are independently cut and moved in accordance with the above-described steps, and the heat storage chambers other than the combustion chamber and the base are stored in the heat storage chamber. The process of carrying it out of the frame for the chamber and the combustion chamber,
It has the feature in dismantling according to.

The invention according to claim 2 is the demolition method for a hot blast furnace for a blast furnace according to claim 1, in place of the step (k), the following step (l),
(L) The top of the combustion chamber is cut, and after the storage of the heat storage chamber other than the base is completed, the top of the combustion chamber is moved to the frame for the heat storage chamber and hung on the heat storage chamber moving carriage. A step of unloading the top of the combustion chamber out of the frame for the heat storage chamber by the moving cart for the heat storage chamber after being lowered;
It has the feature in dismantling according to.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the lifting device is a pressure plate having a plurality of through holes vertically passing through the strands that lift and suspend the heat storage chamber or the combustion chamber. Anchor block, release plate, anchor base plate, multiple clamping cylinders with the cylinder side fixed to the anchor block and the piston side fixed to the release plate, and slidably fitted into the through holes of the anchor block, through the pressure plate A grip that makes contact with the lower end of the hole via a spring, an upper end fixed to the lower surface of the pressure plate, a plurality of connecting rods that pass through the anchor block, and the lower end is fixed to the upper surface of the release plate, and an upper end to the anchor block Fixing the part and penetrating the release plate A gripping device comprising a spacer block having a lower end fixed to an anchor base plate is provided at two locations in the vertical direction of the strand, the anchor base plate of the lower gripping device is used as a fixed base plate, and the anchor base plate of the upper gripping device The movable base plate is a jack device provided with a hydraulic jack having a cylinder side fixed to the fixed base plate and a piston side fixed to the movable base plate.

  The invention according to claim 4 is characterized in that the hot blast furnace for blast furnace is constructed according to the reverse procedure of the dismantling method for the hot blast furnace for claim 1.

  The invention described in claim 5 is characterized in that, in the construction method for a hot blast furnace for blast furnace according to claim 4, the hot blast furnace for blast furnace is constructed according to the reverse procedure of the step (l) instead of the step (k). It is what has.

  A sixth aspect of the present invention is the pressure plate according to the fourth or fifth aspect, wherein the elevating device has a plurality of through holes that vertically penetrate the strands that lift and suspend the heat storage chamber or the combustion chamber, Anchor block, release plate, anchor base plate, multiple clamping cylinders with the cylinder side fixed to the anchor block and the piston side fixed to the release plate, and slidably fitted into the through holes of the anchor block, through the pressure plate A grip that makes contact with the lower end of the hole via a spring, an upper end fixed to the lower surface of the pressure plate, a plurality of connecting rods that pass through the anchor block, and the lower end is fixed to the upper surface of the release plate, and an upper end to the anchor block Fixing the part and penetrating the release plate A gripping device comprising a spacer block having a lower end fixed to an anchor base plate is provided at two locations in the vertical direction of the strand, the anchor base plate of the lower gripping device is used as a fixed base plate, and the anchor base plate of the upper gripping device The movable base plate is a jack device provided with a hydraulic jack having a cylinder side fixed to the fixed base plate and a piston side fixed to the movable base plate.

  According to the present invention, since the heat storage chamber and the combustion chamber can be disassembled or constructed at the same time, the disassembly or construction work period can be greatly shortened, and the heat storage chamber and the combustion chamber constituting the hot stove can be separated. There is no need to cut or connect the connecting pipes to be connected at a high place.

  An embodiment of a demolition method for a hot blast furnace for a blast furnace according to the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a state in which a temporary frame is constructed in the heat storage chamber and the combustion chamber, FIG. 2 is a view taken along arrow X in FIG. 1, and FIG. 3 is a front view showing a state in which the heat storage chamber and the combustion chamber are lifted simultaneously. FIG. 4 is a front view showing a state in which the heat storage chamber and the combustion chamber are simultaneously suspended and placed on the carriage, and FIG. 5 is a front view showing a state in which the top of the cut combustion chamber is placed on the top movable carriage. FIG. 6 is a front view showing a state in which the top of the combustion chamber is placed on the heat storage chamber moving carriage and moved into the heat storage chamber temporary frame, and FIG. 7 is a plan view showing the blast furnace hot stove.

  In the blast furnace hot stove dismantling method of this invention, first, as shown in FIG. 1, temporary storage frames 4 and 5 for the heat storage chamber and the combustion chamber are constructed around the heat storage chamber 2 and the combustion chamber 3 of the hot stove 1. To do. If the existing frame can be used, there is no need to construct the temporary storage frames 4 and 5 for the heat storage chamber and the combustion chamber. The lower part of the combustion chamber 3 is lifted by a predetermined height from the ground and is supported by the existing frame 5A. The width of the frame 5A is narrower than the outer diameter of the top portion 3A of the combustion chamber 3, so the width of the combustion chamber temporary frame 5 is also narrower than the outer diameter of the top portion 3A of the combustion chamber 3, and the inside of the combustion chamber temporary frame 5 is inside. It cannot be hung.

  A plurality of jack devices 6 as lifting devices to be described later are installed in the temporary storage frames 4 and 5 for the heat storage chamber and the combustion chamber. Further, a gantry 7 is constructed below the temporary storage frame 4 for the heat storage chamber, a rail 8 is laid between the gantry 7 and the temporary storage frame 4 for the heat storage chamber, and a moving trolley 9 for the heat storage chamber that moves along the rail 8 is provided. Install. The combustion chamber moving carriage 11 that moves along the rail 10 to the outside of the combustion chamber temporary frame 5 is also installed in the lower part (existing frame) of the combustion chamber temporary frame 5.

  In FIG. 1, since the gantry 7 is constructed in front of the page, the heat storage chamber moving carriage 9 moves in a direction perpendicular to the page (see FIG. 2), and the combustion chamber moving carriage 11 is Although moving in the left-right direction on the paper surface, these moving directions are not limited to these directions as long as there is no interference with incidental equipment.

  In this way, when preparation for dismantling the hot stove is completed, the base 2A of the heat storage chamber 2 is cut along the cutting line (C1) shown in FIG. Next, as shown in FIG. 3, the heat storage chamber 2 above the base 2 </ b> A is lifted by the jack device 6. In this example, a fixing portion of the later-described strand 16 of the jack device 6 is a ring-shaped block 2D. At this time, the combustion chamber 3 is also lifted simultaneously with the heat storage chamber 2 by the jack device 6. Note that the top ceilings of the heat storage chamber and the combustion chamber (shown by dotted lines in FIG. 1) are removed in advance.

  Next, the heat storage chamber moving carriage 9 is moved onto the base 2 </ b> A, and then the suspended heat storage chamber 2 is suspended together with the combustion chamber 3 on the heat storage chamber moving carriage 9 by the jack device 6. Next, the heat storage chamber 2 is cut into the ring-shaped block 2B along the cutting line (C2), and then the heat storage chamber 2 above the ring-shaped block 2B is lifted together with the combustion chamber 3 by the jack device 6. Next, the ring-shaped block 2 </ b> B is moved to the gantry 7 by the heat storage chamber moving carriage 9. The ring-shaped block 2B on the gantry 7 is further cut into a plurality of blocks, and is carried out to a processing place or the like.

  Next, as shown in FIG. 4, the heat storage chamber moving carriage 9 is moved again onto the base 2 </ b> A, and then the lifted heat storage chamber 2 is placed on the heat storage chamber moving carriage 9 by the jack device 6. Hanging with 3 As a result, the height of the heat storage chamber 2 is lowered by the height of the ring-shaped block 2B. Come directly above. Thereafter, the connecting pipe 12 is cut. Since the cutting operation of the connecting pipe 12 is not a work at a high place, it can be safely performed without assembling a large scaffold. At this time, the lower part of the combustion chamber 3 comes directly above the combustion chamber moving carriage 11.

  After the connection pipe 12 is cut in this way, the heat storage chamber 2 is cut in the order of the cutting lines (C3), (C4), (C5), and the ring-shaped blocks 2C, 2D, 2E and the top 2F are Carry out in the same way. Similarly to the heat storage chamber 2, the combustion chamber 3 is cut into a plurality of ring-shaped blocks and sequentially conveyed by the combustion chamber moving carriage 11. Thus, since the heat storage chamber and the combustion chamber can be dismantled at the same time, the dismantling work period can be greatly shortened compared to the case where the heat accumulating chamber 2 and the combustion chamber 3 are disassembled separately.

  In this way, when the conveyance of the combustion chamber 3 other than the heat storage chamber 2 and the top portion 3A is completed, as shown in FIG. 5, rails 13 are laid on the upper portions of the temporary storage frames 4 and 5 for the heat storage chamber and the combustion chamber, A top moving carriage 14 is installed. Then, after the top portion 3A of the combustion chamber 3 is placed on the top movement carriage 14 by another jack device 6, as shown in FIG. 6, it moves to the temporary storage frame 4 side for the heat storage chamber, and on the heat storage chamber movement carriage 9 After being hung on, move to the gantry 7 and carry it out.

  In this way, all the dismantling of the hot stove 1 other than the base 2A of the heat storage chamber 2 is completed.

  When the top portion 3A of the combustion chamber 3 cannot be suspended in the combustion chamber temporary frame 4, only the top portion 3A of the combustion chamber 3 moves on the heat storage chamber moving carriage 9 as described above. When suspending, similarly to the heat storage chamber 2, the top portion 3A of the combustion chamber 3 is also moved by the combustion chamber moving carriage 11 and carried out.

  FIG. 7 is a plan view showing a case where the present invention is applied to an actual hot stove.

  As illustrated, in this example, four hot stove furnaces 1 are constructed. Since existing facilities and air preheaters are installed around the hot stove 1 and are narrow, heavy machinery such as large cranes cannot be carried in. Although there is a carry-in route, since this is a material / equipment carry-in route, heavy machinery cannot be carried in.

  Therefore, the gantry 7 is constructed along the hot stove 1, and the temporary storage frames 4 and 5 for the heat storage chambers and the combustion chambers are constructed around each of the heat storage chambers 2 and the combustion chambers 3. In this case, if the existing frame can be used, it is not necessary to construct it.

  Disassembly was performed according to the above-described steps, and the cut ring-shaped block of each heat storage chamber 2 was conveyed to the end of the gantry 7 (right end in the figure) in the direction of the arrow in the figure by the heat storage chamber moving carriage 9. Then, it is cut into a plurality of blocks and carried out to a processing plant or the like. The cut ring-shaped block of each combustion chamber 3 is carried out by the combustion chamber moving carriage 11.

  Disassembly of the hot stove may be performed for each unit only in a hot stove that needs to be disassembled, or a plurality of units may be performed simultaneously by shifting the timing of transporting the ring-shaped blocks.

  The above is the case of disassembling the blast furnace hot stove according to the present invention, but when constructing the hot stove, it is constructed according to the reverse procedure of the dismantling procedure.

  That is, the heat storage chamber 2 and the combustion chamber 3 are constructed in advance by dividing them into a plurality of ring-shaped blocks. First, the tops 2F and 3A of the heat storage chamber 2 and the combustion chamber 3 connected by the connecting pipe 12 are simultaneously lifted by the jack device 6, and the upper blocks of the heat storage chamber 2 and the combustion chamber 3 are carried into these lower portions. Next, the top portions 2F and 3A are suspended at the same time, placed on each upper block, and connected. Thereafter, the top portions 2F, 3A and the upper blocks are simultaneously lifted, and the next block of the heat storage chamber 2 and the combustion chamber 3 is carried into the lower portion of each upper block. Next, the top portions 2F and 3A and the upper blocks are suspended and placed on and connected to the subsequent blocks. By repeating this operation, a hot stove is constructed.

  Even when constructing a hot blast furnace for a blast furnace, it is possible to construct a heat storage chamber and a combustion chamber at the same time without using a large crane. It is no longer necessary to connect the connecting pipe that connects the heat storage chamber and the combustion chamber at a high place.

  Next, the jack device 6 will be described with reference to the drawings.

  8 is a cross-sectional view showing the jack device, FIG. 9 is a cross-sectional view showing the gripping device constituting the jack device, FIG. 10 is a plan view showing the pressure plate, and FIG. 11 is a perspective view showing the grip.

  This jack device 6 is disclosed in Japanese Patent Application Laid-Open No. 10-59691, and as a result of being able to uniformly maintain the load applied to the strand that lifts a super heavy object, the load is concentrated on a specific strand. The strands are not cut or stretched, so that heavy objects can be lifted and lowered reliably, and can be accurately tuned by inverter control. Therefore, when disassembling or constructing a hot stove according to the present invention, it is possible to easily lift and suspend the heat storage chamber and the combustion chamber connected by the connecting pipe in synchronization with each other.

  As shown in FIG. 8, the jack device 6 has the gripping devices 15 shown in FIG. 9 provided at two locations in the vertical direction of the strand 16.

  The gripping device 15 includes a pressure plate 17, an anchor block 18, a release plate 19, an anchor base plate 20 having a plurality of (seven) through-holes 17a that vertically penetrate a plurality of (seven in this example) strands 16. The cylinder side is fixed to the anchor block 19 and the piston side is fixed to the release plate 19. The clamping cylinder 21 is slidably fitted into the through hole 18 a of the anchor block 18. A grip 23 that is brought into contact with the lower end via a spring 22, and a plurality of connecting rods 24 that are fixed at the upper end to the lower surface of the pressure plate 17, penetrate the anchor block 18, and are fixed at the lower end to the upper surface of the release plate 19. The upper end of the anchor block 18 Is, through the release plate 19, the lower end portion to the anchor base plate 20 is made from a fixed spacer blocks 25.

  The jack device 6 uses the anchor base plate 20 of the lower gripping device 15B as a fixed base plate, the anchor base plate 20 of the upper gripping device 15A as a movable base plate, and fixes the cylinder side to the fixed base plate. The hydraulic jack 26 having a fixed piston side is provided.

  In order to lift and suspend the super heavy object 28 (heat storage chamber or combustion chamber) by the jack device 6, the strand 16 is fixed to the super heavy object 28 via the bracket 27. When lifting, the clamping cylinder 21 of the lower gripping device 15B is contracted and the grip 23 is pulled out from the through hole 18a of the anchor block 18 against the elastic force of the spring 22 and loosened. At this time, the clamping cylinder 21 of the upper gripping device 15 </ b> A is extended, and the grip 23 is inserted into the through hole 18 a of the anchor block 18 by the elastic force of the spring 22 to grip the strand 16. Next, when the hydraulic jack 26 is extended, the super-heavy object 28 is lifted by the stroke. Next, the grip 23 of the upper gripping device 15A is loosened, the strand 16 is gripped by the grip 23 of the lower gripping device 15B, and the hydraulic jack 26 is contracted. The super heavy object 28 can be lifted intermittently by loosening the grip 23 of the lower gripping device 15B, repeatedly holding the strand 16 with the grip 23 of the upper gripping device 15A, and extending the hydraulic jack 26 repeatedly. . In the case of suspending, the super heavy object 28 can be suspended intermittently by performing the reverse operation to the case of suspending.

  According to the jack device 6, the pressure plate 17 and the release plate 19 have a function of moving up and down integrally by the plurality of connecting rods 24 penetrating the anchor block 18. Thus, the pressure plate 17 and the release plate 19 are simultaneously moved up and down to force the plurality of grips 23 to be inserted into the through holes 18a of the anchor block 18 so that the strands 16 are uniformly grasped or loosened. Thus, the super heavy object 28 can be reliably lifted and hung.

  In addition to the jack device 6 described above, other jacks may be used as long as the super heavy object 28 can be lifted and hung down accurately.

It is a front view which shows the state which constructed the temporary frame in the thermal storage chamber and the combustion chamber. FIG. 2 is a view taken in the direction of arrow X in FIG. It is a front view which shows the state which lifted the thermal storage chamber and the combustion chamber simultaneously. It is a front view which shows the state which suspended the thermal storage chamber and the combustion chamber simultaneously, and mounted on the trolley | bogie. It is a front view which shows the state which put the top part of the cut combustion chamber on the top moving trolley | bogie. It is a front view which shows the state which put the top part of the combustion chamber on the moving trolley | bogie for thermal storage chambers, and was moved in the temporary frame for thermal storage chambers. It is a top view which shows the hot blast furnace for blast furnaces. It is sectional drawing which shows a jack apparatus. It is sectional drawing which shows the gripping apparatus which comprises a jack apparatus. It is a top view which shows a pressure plate. It is a perspective view which shows a grip. It is a schematic front view which shows the state which cut | disconnected the furnace body into the several ring-shaped block by the conventional dismantling method. It is a schematic front view which shows the state which lifted the furnace body above the ring-shaped block (F) of the lowest step. It is a schematic front view which shows the state which moves a ring-shaped block (E) on a mount frame.

Explanation of symbols

1: Hot stove 2: Heat storage chamber 2B-2E: Ring block 2F: Top of heat storage chamber 3: Combustion chamber 3A: Top of combustion chamber 4: Temporary frame for heat storage chamber 5: Temporary frame for combustion chamber 5A: Existing frame 6: Jacking device 7: Stand 8: Rail 9: Moving cart for heat storage chamber 10: Rail 11: Moving cart for combustion chamber 12: Connecting tube 13: Rail 14: Top moving cart 15: Gripping device 15A: Lower gripping device 15B: Upper gripping device 16: Strand 17: Pressure plate 17a: Through hole 18: Anchor block 18a: Through hole 19: Release plate 20: Anchor base plate 21: Clapping cylinder 22: Spring 23: Grip 24: Connecting rod 25: Spacer Block 26: Hydraulic jack 27: Bracket 28: Super heavy

Claims (6)

In a demolition method for a hot blast furnace for a blast furnace, comprising a heat storage chamber and a combustion chamber, wherein the top of the heat storage chamber and the top of the combustion chamber are connected by a connecting pipe,
Elevating devices are installed in the heat storage chamber and the combustion chamber frame around the heat storage chamber and the combustion chamber, and moving carts for the heat storage chamber and the combustion chamber are installed below the frame for the heat storage chamber and the combustion chamber And the following steps (a) to (k):
(A) cutting the base of the heat storage chamber;
(B) a step of lifting the heat storage chamber above the base together with the combustion chamber by the lifting device;
(C) a step of moving the heat storage chamber moving carriage on the base;
(D) suspending the suspended heat storage chamber together with the combustion chamber on the heat storage chamber moving carriage by the lifting device;
(E) cutting the heat storage chamber on the heat storage chamber moving carriage into ring-shaped blocks;
(F) a step of lifting the heat storage chamber on the ring-shaped block together with the combustion chamber by the lifting device;
(G) a step of moving the ring-shaped block outside the frame for the heat storage chamber by the moving cart for the heat storage chamber;
(H) a step of returning the heat storage chamber moving carriage onto the base after the ring-shaped block is unloaded from the heat storage chamber moving carriage;
(I) a step of suspending the heat storage chamber together with the combustion chamber on the heat storage chamber moving carriage by the lifting device;
(J) Repeating the above steps until the tops of the heat storage chamber and the combustion chamber are directly above the frame for the heat storage chamber and the combustion chamber, and then cutting the connecting pipe;
(K) The heat storage chamber and the combustion chamber are independently cut and moved in accordance with the above-described steps, and the heat storage chambers other than the combustion chamber and the base are stored in the heat storage chamber. The process of carrying it out of the frame for the chamber and the combustion chamber,
Dismantling method for blast furnace hot stove In the demolition method for a hot blast furnace for a blast furnace according to claim 1, in place of the step (k), the following step (l):
(L) The top of the combustion chamber is cut, and after the storage of the heat storage chamber other than the base is completed, the top of the combustion chamber is moved to the frame for the heat storage chamber and hung on the heat storage chamber moving carriage. A step of unloading the top of the combustion chamber out of the frame for the heat storage chamber by the moving cart for the heat storage chamber after being lowered;
Dismantling method for blast furnace hot stove   The lifting device includes a pressure plate, an anchor block, a release plate, an anchor base plate having a plurality of through holes that vertically penetrate the strands that lift and suspend the heat storage chamber or the combustion chamber, and a cylinder side fixed to the anchor block. A plurality of clamping cylinders with the piston side fixed to the release plate, a grip that is slidably fitted into the through hole of the anchor block, and that contacts the lower end of the through hole of the pressure plate via a spring, and a lower surface of the pressure plate The upper end is fixed, the anchor block is penetrated, the connecting rod has the lower end fixed to the upper surface of the release plate, the upper end is fixed to the anchor block, the release plate is penetrated, and the lower end is fixed to the anchor base plate Spacer block Are provided at two locations in the vertical direction of the strand, the anchor base plate of the lower gripping device is used as a fixed base plate, and the anchor base plate of the upper gripping device is used as a movable base plate with respect to the fixed base plate. 3. A method for dismantling a hot blast furnace for a blast furnace according to claim 1 or 2, comprising a jack device provided with a hydraulic jack having a cylinder side fixed and a piston side fixed to the movable base plate.   A construction method for a hot blast furnace for a blast furnace, comprising constructing the hot blast furnace for a blast furnace in accordance with a procedure reverse to the dismantling method for the hot blast furnace for a blast furnace according to claim 1.   The construction method of a hot blast furnace for a blast furnace according to claim 4, wherein the hot blast furnace for a blast furnace is constructed according to the reverse procedure of the step (l) instead of the step (k). Construction method.   The lifting device includes a pressure plate, an anchor block, a release plate, an anchor base plate having a plurality of through holes that vertically penetrate the strands that lift and suspend the heat storage chamber or the combustion chamber, and a cylinder side fixed to the anchor block. A plurality of clamping cylinders with the piston side fixed to the release plate, a grip that is slidably fitted into the through hole of the anchor block, and that contacts the lower end of the through hole of the pressure plate via a spring, and a lower surface of the pressure plate The upper end is fixed, the anchor block is penetrated, the connecting rod has the lower end fixed to the upper surface of the release plate, the upper end is fixed to the anchor block, the release plate is penetrated, and the lower end is fixed to the anchor base plate Spacer block Are provided at two locations in the vertical direction of the strand, the anchor base plate of the lower gripping device is used as a fixed base plate, and the anchor base plate of the upper gripping device is used as a movable base plate with respect to the fixed base plate. The construction method for a hot blast furnace for a blast furnace according to claim 4 or 5, comprising a jack device provided with a hydraulic jack having a cylinder side fixed and a piston side fixed to the movable base plate.

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