Method for replacing cooling wall of blast furnace

Abstract

The invention relates to the technical field of blast furnace equipment, in particular to a blast furnace cooling wall replacement method. The blast furnace cooling wall replacement method comprises the steps that a feeding opening communicating with the interior of a blast furnace is formed in the side wall of the blast furnace; mounting a chute on the outer wall of the blast furnace, and aligning the chute to the feeding hole to form a feeding channel; and the cooling wall to be replaced is moved out of the blast furnace through the feeding channel, and a new cooling wall is moved into the blast furnace through the feeding channel and reassembled. According to the blast furnace cooling wall replacement method provided by the invention, the feeding opening communicated with the interior of the blast furnace is formed in the side wall of the blast furnace, and the feeding opening is communicated with the chute to form the feeding channel, so that the disassembled cooling wall and a new cooling wall can be directly conveyed through the conveying channel without being conveyed in a hoisting manner; therefore, the transportation time of the cooling wall is greatly shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace equipment, and in particular to a blast furnace cooling wall replacement method. Background Art

[0002] There is a cooling wall inside the blast furnace shell. When high-temperature smelting is carried out inside the blast furnace, the cooling wall can quickly and effectively take away a large amount of heat transmitted during smelting in the furnace, increase the stability of the blast furnace masonry, and make the furnace curve meet the design requirements. After the blast furnace has been used for a long time, some cooling walls are seriously damaged, the temperature of the cooling walls is high, some water channels are damaged, and the cooling effect is poor, which brings serious hidden dangers to production. Therefore, it is necessary to use the wind stop maintenance time to replace it.

[0003] In the related art, the replacement method of the cooling wall is: the disassembled old cooling wall is hoisted to the position of the large square manhole on the furnace top, and then poured out of the furnace. When reinstalling, the new cooling wall is hoisted into the furnace through the large square manhole on the furnace top. However, the hoisting method takes a long time, and only one cooling wall can be hoisted at a time, resulting in low construction efficiency. Summary of the invention

[0004] The present application provides a method for replacing a blast furnace cooling wall, which improves the technical problem that the lifting method in the related art is time-consuming and only one cooling wall can be lifted at a time, resulting in low construction efficiency.

[0005] The present application embodiment provides a blast furnace cooling wall replacement method, comprising:

[0006] A feeding port communicating with the interior of the blast furnace is provided on the side wall of the blast furnace;

[0007] Installing a chute on the outer wall of the blast furnace and aligning the chute with the feeding port to form a feeding channel;

[0008] The cooling stave to be replaced is moved out of the blast furnace through the feeding channel, and the new cooling stave is moved into the blast furnace through the feeding channel and reinstalled.

[0009] In some embodiments, the step of opening a feeding port in the side wall of the blast furnace that is connected to the interior of the blast furnace comprises:

[0010] A first through hole is opened on the cooling wall to be replaced; wherein the inner wall of the blast furnace is installed with multiple layers of cooling sections arranged vertically, each cooling section includes multiple cooling walls, and along the direction from the furnace bottom to the furnace top, the multiple cooling walls included in the cooling sections of the sixth and seventh layers are the cooling walls to be replaced;

[0011] A second through hole corresponding to the first through hole is opened on the furnace shell of the blast furnace to form the feeding port.

[0012] In some embodiments, the step of opening a first through hole on the cooling wall to be replaced includes:

[0013] Draw a center line on at least two adjacent cooling walls to be replaced to divide the cooling walls into an upper half and a lower half;

[0014] A first sub-through hole is provided in the lower half of at least two of the cooling walls, and at least two of the first sub-through holes are connected to form the first through hole.

[0015] In some embodiments, the step of moving the cooling stave to be replaced out of the blast furnace through the feeding channel, and moving the new cooling stave into the blast furnace through the feeding channel and reinstalling the cooling stave includes:

[0016] Building a construction platform below the cooling wall to be replaced;

[0017] Lifting the crane to the construction platform;

[0018] The cooling wall to be replaced is hoisted to the feeding channel by the crane to be removed from the blast furnace;

[0019] The new cooling wall is transported to the construction platform through the feeding channel, and the cooling wall is reinstalled by the crane.

[0020] In some embodiments, the step of building a construction platform in the blast furnace includes:

[0021] A main frame is fixedly installed in the blast furnace;

[0022] Arranging a plurality of secondary beams along the circumference of the blast furnace, and connecting each of the secondary beams to the main frame to form a construction frame;

[0023] A flat plate is laid on the construction frame to form the construction platform.

[0024] In some embodiments, the step of fixing and installing the main frame in the blast furnace comprises:

[0025] Extending two or more main beams into the blast furnace through the tuyere in sequence; wherein the side wall of the blast furnace has a plurality of tuyere, and the plurality of tuyere are arranged at equal intervals along the circumference of the blast furnace; the two or more main beams are arranged side by side, and the two ends of each main beam are respectively located at different tuyere, and the two ends of each main beam extend out of the side wall of the blast furnace;

[0026] A plurality of cross beams are welded to two or more main beams at intervals to form the main frame.

[0027] In some embodiments, the step of arranging a plurality of secondary beams along the circumference of the blast furnace and connecting each of the secondary beams to the main frame to form a construction frame includes:

[0028] Extending a plurality of secondary beams into the blast furnace through the tuyere in sequence; wherein two ends of each secondary beam are respectively located in different tuyere, and two ends of each secondary beam extend out of the side wall of the blast furnace;

[0029] A plurality of secondary beams are welded to the main frame to form the construction frame.

[0030] In some embodiments, the step of hoisting the crane to the construction platform includes:

[0031] A first workbench is built on the construction platform, and a crane is hoisted to the first workbench.

[0032] In some embodiments, the step of lifting the cooling stave to be replaced to the feeding channel by the crane to remove it from the blast furnace comprises:

[0033] Building a second workbench on the construction platform; wherein the second workbench is located on one side of the first workbench;

[0034] Lifting the first hook machine onto the second workbench, and lifting the second hook machine to a side of the first workbench away from the second workbench;

[0035] The refractory material between the seventh layer of the cooling section and the furnace shell is chiseled out by the first hook machine, and the refractory material between the sixth layer of the cooling section and the furnace shell is chiseled out by the second hook machine.

[0036] In some embodiments, the second workbench is higher than the first workbench.

[0037] The beneficial effects of this application are as follows:

[0038] The present application provides a method for replacing a blast furnace cooling wall. Since a feeding port connected to the interior of the blast furnace is opened on the side wall of the blast furnace, and the feeding port is connected to the chute to form a feeding channel, the disassembled cooling wall and the new cooling wall can be directly transported through the transportation channel without the need for transportation by lifting, thereby greatly reducing the transportation time of the cooling wall and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0040] Figure 1A schematic diagram of the local structure of a blast furnace is shown.

[0041] Figure 2 A schematic diagram showing the construction status inside the blast furnace is shown.

[0042] Figure 3 Shows Figure 2 A partial top view of .

[0043] Description of reference numerals:

[0044] 100-furnace shell, 110-sixth layer cooling section, 120-seventh layer cooling section, 130-cooling wall, 140-feeding port, 150-tuyere, 200-chute, 210-feeding channel, 300-construction platform, 310-main frame, 311-main beam, 312-cross beam, 320-secondary beam, 330-plate, 340-first workbench, 350-second workbench, 400-crane, 500-first hook machine, 600-second hook machine. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] See also Figure 1 The blast furnace cooling wall replacement method provided in the embodiment of the present application can directly transport the disassembled cooling wall 130 and the new cooling wall 130 through the transportation channel on the side wall of the blast furnace without the need to transport the cooling wall 130 by lifting, thereby greatly reducing the transportation time of the cooling wall 130 and improving the construction efficiency.

[0050] See also Figure 1 , a blast furnace cooling wall replacement method provided in an embodiment of the present application comprises:

[0051] S100: A feed port 140 communicating with the interior of the blast furnace is opened on the side wall of the blast furnace.

[0052] The blast furnace has a furnace shell 100, and a cooling wall 130 is arranged on the inner side of the furnace shell 100. Therefore, in order to open a feed port 140 connected to the interior of the blast furnace on the side wall of the blast furnace, openings are required on both the furnace shell 100 and the cooling wall 130, and the openings on the furnace shell 100 and the cooling wall 130 need to be connected to form the feed port 140.

[0053] In some embodiments, the step of opening a feeding port 140 in the side wall of the blast furnace and communicating with the interior of the blast furnace comprises:

[0054] S110: Opening a first through hole on the cooling wall 130 to be replaced.

[0055] The inner wall of the blast furnace is equipped with multiple layers of cooling sections arranged vertically, each cooling section includes multiple cooling walls 130, and multiple cooling walls 130 are arranged closely along the circumference of the furnace shell 100. In the direction from the furnace bottom to the furnace top, there are the first cooling section, the second cooling section, the third cooling section, and so on. Since the sixth and seventh cooling sections 120 are located in the blast furnace smelting area, that is, the area where liquid iron is formed, the temperature is relatively high, so the cooling walls 130 of the sixth and seventh cooling sections 120 are the most seriously damaged and need to be replaced. Therefore, the multiple cooling walls 130 included in the sixth and seventh cooling sections 120 are the cooling walls 130 to be replaced, that is, the first through holes are opened on the sixth and seventh cooling sections 120.

[0056] Since the first through hole is opened on the cooling stave 130 to be replaced, it can be known that the position of the feeding channel 210 is also at the cooling stave 130 to be replaced, that is, the distance between the area to be replaced and the feeding channel 210 is short, so that after the cooling stave 130 to be replaced is removed, the cooling stave 130 can be more conveniently fed into the feeding channel 210 and time can be saved. Similarly, when reinstalling a new cooling stave 130, the new cooling stave 130 can be more quickly sent to the position to be reinstalled. The area to be replaced refers to the position of the cooling stave 130 to be replaced on the furnace shell 100.

[0057] Specifically, the inner wall of the blast furnace is installed with 16 layers of cooling sections arranged vertically, and each layer of cooling sections includes 45 cooling walls 130 .

[0058] In some embodiments, the step of opening a first through hole on the cooling wall 130 to be replaced includes:

[0059] S111: Draw a center line on at least two adjacent cooling staves 130 to be replaced, so as to divide the cooling staves 130 into an upper half and a lower half.

[0060] The center line is the middle position of the cooling wall 130 along the height direction, the upper half is the part close to the furnace top, and the lower half is the part close to the furnace bottom. Since the height dimension of a cooling wall 130 is relatively large, the first through hole only needs to be opened in a part of the cooling wall 130.

[0061] S112: A first sub-through hole is formed in the lower half of at least two cooling walls 130 , and at least two first sub-through holes are connected to form a first through hole.

[0062] The width of the feed channel 210 needs to be greater than the width of the cooling wall 130 to facilitate the transportation of the cooling wall 130 in the feed channel 210. Therefore, first sub-through holes are opened on at least two cooling walls 130, and at least two first sub-through holes are connected to form a first through hole. In this way, the width of the feed channel 210 can be increased. Of course, the two cooling walls 130 are arranged adjacent to each other. The at least two cooling walls 130 can be two, three or more, and there is no limitation on this.

[0063] Specifically, the lower the position of the feeding channel 210 is, the closer it is to the ground, which makes it more convenient to transport the cooling wall 130 from the feeding channel 210 to the ground. Therefore, a first sub-through hole is opened in the lower half of at least two cooling walls 130, and since the sixth-layer cooling section 110 is located below the seventh-layer cooling section 120, a first sub-through hole can be opened in at least two cooling walls 130 of the sixth-layer cooling section 110.

[0064] S120 : a second through hole corresponding to the first through hole is opened on the furnace shell 100 of the blast furnace to form a feed port 140 .

[0065] The second through hole completely corresponds to the first through hole, so the second through hole is connected to the first through hole to form the feed port 140. The first through hole and the second through hole can be opened by cutting, that is, the cooling wall 130 is first cut to form the first through hole, and then the furnace shell 100 is cut at the corresponding position to form the second through hole.

[0066] S200 : Install the chute 200 on the outer wall of the blast furnace, and align the chute 200 with the feeding port 140 to form a feeding channel 210 .

[0067] That is, the chute 200 is connected to the feed port 140, and the chute 200 is connected to the outer wall of the blast furnace, and the feed port 140 and the chute 200 form a feed channel 210. The chute 200 can be tilted to facilitate the cooling wall 130 to slide in the feed channel 210 for transportation. Of course, since the height of the sixth-layer cooling section 110 from the furnace bottom is relatively high, the length of the chute 200 is limited, so the end of the chute 200 is suspended and not grounded. When the old cooling wall 130 reaches the end of the chute 200, the cooling wall 130 needs to be hoisted from the chute 200 to the ground by the overhead crane in front of the furnace, and loaded and transported out of the maintenance site for storage. A limit structure can be set at the end of the chute 200 to prevent the cooling wall 130 from falling directly to the ground.

[0068] S300: The cooling stave 130 to be replaced is moved out of the blast furnace through the feeding channel 210, and a new cooling stave 130 is moved into the blast furnace through the feeding channel 210 and reinstalled.

[0069] After the cooling stave 130 to be replaced is removed from the furnace shell 100, the cooling stave 130 to be replaced can be moved out of the blast furnace through the feeding channel 210; similarly, when reinstalling, the new cooling stave 130 is transported to the blast furnace through the feeding channel 210, and the removed cooling stave 130 and the new cooling stave 130 can be directly transported through the transportation channel on the side wall of the blast furnace, without the need to transport the cooling stave 130 by lifting, thereby greatly reducing the transportation time of the cooling stave 130 and improving the construction efficiency.

[0070] In some embodiments, the steps of moving the cooling stave 130 to be replaced out of the blast furnace through the feeding channel 210, and moving the new cooling stave 130 into the blast furnace through the feeding channel 210 and reinstalling the cooling stave 130 include:

[0071] S310: Building a construction platform 300 below the cooling wall 130 to be replaced.

[0072] See also Figure 2 and Figure 3When removing the cooling stave 130 to be replaced from the furnace shell 100, the construction personnel need to first cut the cooling stave 130 to be replaced, and cut the water pipes of the auxiliary equipment and facilities of the cooling stave 130, the buckle bowl and other connecting parts on the outer side of the furnace shell, and then weld the jack base on the furnace shell 100, and use the hydraulic jack to push the cut cooling stave 130 into the furnace. Therefore, a construction platform 300 is required to carry the construction personnel and receive the cooling stave 130 pushed out by the hydraulic jack.

[0073] Since the construction platform 300 needs to receive the cooling wall 130 pushed out by the hydraulic jack, and the cooling wall 130 falls downward after being pushed out, the construction platform 300 is arranged below the area to be replaced, that is, below the sixth cooling section 110 .

[0074] In some embodiments, the step of building the construction platform 300 in the blast furnace includes:

[0075] S311: Fixing and installing the main frame 310 in the blast furnace.

[0076] The side wall of the blast furnace has a plurality of tuyere 150, which connects the inside and outside of the blast furnace, and the plurality of tuyere 150 is arranged at equal intervals along the circumference of the blast furnace. Since the plurality of tuyere 150 is just below the sixth cooling section 110 and close to the sixth cooling section 110, the tuyere 150 can be used to fix the construction platform 300. The number of tuyere 150 is an even number, and each tuyere 150 is arranged opposite to another tuyere 150 along the radial direction of the blast furnace.

[0077] The main frame 310 includes more than two main beams 311 and multiple cross beams 312. When installing the main frame 310, the two or more main beams 311 are first extended into the blast furnace through the tuyere 150 in sequence, and the multiple cross beams 312 are welded to the two or more main beams 311 at intervals to form the main frame 310.

[0078] Among them, since the number of tuyere 150 is even, each tuyere 150 is arranged opposite to another tuyere 150 along the radial direction of the blast furnace. Therefore, after the main beam 311 is extended into the blast furnace through one of the tuyere 150, the main beam 311 can enter the other tuyere 150 opposite to the tuyere 150. Therefore, the two ends of each main beam 311 are respectively located in different tuyere 150. In other words, the two ends of each main beam 311 are respectively located in two tuyere 150 arranged opposite to each other along the radial direction of the blast furnace, so that the side wall of the blast furnace supports the main beam 311, so that the main beam 311 is fixed.

[0079] Of course, the length of the main beam 311 is greater than the diameter of the blast furnace. Therefore, when the main beam 311 is installed, both ends of the main beam 311 extend out of the side walls of the blast furnace. In this way, the contact area between the side walls of the blast furnace and the main beam 311 can be increased, thereby enhancing the supporting force of the main beam 311 and making the fixing effect of the main beam 311 better.

[0080] In order to facilitate welding of cross beams 312 on more than two main beams 311, more than two main beams 311 are arranged side by side. In this way, more than two main beams 311 and multiple cross beams 312 form a rectangular frame with a certain structural strength. The cross beams 312 and the main beams 311 can be arranged vertically, and the part of the main beam 311 extending outside the blast furnace is also welded with the cross beam 312, thereby increasing the structural strength of the main frame 310.

[0081] It should be noted that, since the chute 200 is also located below the area to be replaced, in order to avoid interference between the chute 200 and the tuyere 150 , the chute 200 is located between two adjacent tuyere 150 .

[0082] S312: Arrange a plurality of secondary beams 320 along the circumference of the blast furnace, and connect each secondary beam 320 to the main frame 310 to form a construction frame.

[0083] When installing the secondary beams 320 , the plurality of secondary beams 320 are first sequentially extended into the blast furnace through the tuyere 150 , and then the plurality of secondary beams 320 are welded to the main frame 310 to form a construction frame.

[0084] The two ends of each secondary beam 320 are respectively located in different tuyere 150, and the two ends of each secondary beam 320 extend out of the side wall of the blast furnace. The installation method of the secondary beam 320 is the same as that of the main beam 311, which will not be repeated here.

[0085] Specifically, there are 30 tuyere 150 in total, i.e., 15 pairs of tuyere 150 arranged opposite to each other along the radial direction of the blast furnace, 3 tuyere 150 are provided on the main beam 311, which occupies 6 tuyere 150 in total, and 12 tuyere 150 are provided on the secondary beam 320, which occupies the remaining 24 tuyere 150 in total. The main beam 311 can use H400*20*18*20 steel, and the intervals between the three main beams 311 are all 1400mm, and the secondary beam 320 uses I32 I-beam.

[0086] S313: Laying a flat plate 330 on the construction frame to form a construction platform 300 .

[0087] After the construction frame is built, a flat plate 330 can be laid on the construction frame to facilitate the construction workers to stand and place the cooling wall 130. Specifically, the flat plate 330 can be made of 12mm steel plate to serve as a working surface for construction workers and machinery.

[0088] S320 : hoisting the crane 400 to the construction platform 300 .

[0089] After the cooling wall 130 is removed, the cooling wall 130 needs to be hoisted to the feeding channel 210 by the crane 400, so the crane 400 needs to be hoisted to the construction platform 300 first. Specifically, the crane 400 can be hoisted to the construction platform 300 through the large square manhole on the top of the blast furnace by a 10-ton winch and fastened in place with bolts.

[0090] In some embodiments, the step of lifting the crane 400 to the construction platform 300 includes: building a first workbench 340 on the construction platform 300 , and lifting the crane 400 to the first workbench 340 .

[0091] It is understandable that the first workbench 340 is higher than the construction platform 300, so that the position of the crane 400 is higher. Since the construction platform 300 is located below the area to be replaced, and the feeding channel 210 is located in the area to be replaced, in order to facilitate the crane 400 to lift the cooling wall 130 on the construction platform 300 into the feeding channel 210, the crane 400 is lifted to the construction platform 300, so that the position of the crane 400 is higher.

[0092] S330: The cooling stave 130 to be replaced is hoisted to the feeding channel 210 by the crane 400 to be moved out of the blast furnace.

[0093] After the crane 400 is installed, the cooling staves 130 to be replaced can be lifted onto the chute 200 one by one, transported to the iron-making yard, and lifted from the chute 200 to the ground by the overhead crane in front of the furnace, and then loaded and transported out of the maintenance site for storage.

[0094] S340: Build a second workbench 350 on the construction platform 300, hoist the first crane 500 onto the second workbench 350, hoist the second crane 600 to the side of the first workbench 340 away from the second workbench 350, and use the first crane 500 to chisel out the refractory material between the seventh cooling section 120 and the furnace shell 100, and use the second crane 600 to chisel out the refractory material between the sixth cooling section 110 and the furnace shell 100.

[0095] After the cooling stave 130 to be replaced is removed, the refractory material on the furnace shell 100 needs to be cleaned to facilitate the subsequent reinstallation of the cooling stave 130 .

[0096] It is understandable that the second workbench 350 is also higher than the construction platform 300. Since the construction platform 300 is closer to the sixth cooling section 110, the second crane 600 is directly located on the construction platform 300, and the refractory material between the sixth cooling section 110 and the furnace shell 100 can be chiseled out. Since the seventh cooling section 120 is located above the sixth cooling section 110, in order to facilitate the first crane 500 to chisel out the refractory material between the seventh cooling section 120 and the furnace shell 100, the first crane 500 is hoisted onto the second workbench 350, so that the first crane 500 is located at a higher position.

[0097] Among them, the second workbench 350 is located on one side of the first workbench 340, and the second hook machine 600 is located on the side of the first workbench 340 away from the second workbench 350, that is, the first hook machine 500 and the second hook machine 600 are arranged at both ends of the crane 400, so that the positions of the first hook machine 500, the second hook machine 600 and the crane 400 do not interfere with each other.

[0098] Specifically, the first crane 500 and the second crane 600 can also be hoisted to the construction platform 300 through the large manhole on the top of the blast furnace by a 10-ton winch and fastened in place with bolts. After the refractory material is removed, the first crane 500 and the second crane 600 can be hoisted out.

[0099] In some embodiments, since the second hook machine 600 needs to extend to the position of the seventh-layer cooling section 120 to perform operations, and the crane 400 is used to lift the cooling wall 130 on the construction platform 300, during the disassembly stage of the cooling wall 130, the operating height of the second hook machine 600 is higher than that of the crane 400, and therefore the second workbench 350 can be higher than the first workbench 340, that is, the position of the second hook machine 600 is higher than that of the crane 400.

[0100] S350 : transporting the new cooling stave 130 to the construction platform 300 through the feeding channel 210 , and reinstalling the cooling stave 130 through the crane 400 .

[0101] After the cooling stave 130 to be replaced is moved out of the blast furnace, the new cooling stave 130 can be transported into the furnace for reinstallation. Specifically, the crane in front of the furnace hoists the new cooling stave 130 to the middle and upper part of the feeding channel 210, the winch of the chute 200 pulls the cooling stave 130 into the blast furnace, the crane 400 hoists the cooling stave 130 and reinstalls the cooling stave 130 onto the furnace shell 100, and the construction personnel inside and outside the furnace cooperate to fix the cooling stave 130 and adjust the gap of the cooling stave 130.

[0102] The construction workers in the furnace ram the gaps of the cooling staves 130. When all the new cooling staves 130 enter the construction platform 300 in the furnace, the furnace shell 100 is reinstalled to fill the second through hole, so that the surface of the furnace shell 100 is perfect, and the chute 200 is removed. The overhead crane in front of the furnace cooperates to lift the removed chute 200. The ramming material of the gaps of the cooling staves 130 is rammed in the furnace, and the weld seam of the reinstalled new furnace shell 100 is heated and welded outside the furnace according to the installation process requirements.

[0103] The installed cooling stave 130 is welded with expansion joints and buckle cups outside the furnace shell 100, and the inlet and outlet water pipes of the cooling stave 130 are connected according to the process requirements. Finally, the crane 400 in the furnace is lifted out from the large manhole, and the construction platform 300 is transported out of the blast furnace from the tuyere 150, and the replacement of the blast furnace cooling stave 130 is completed.

[0104] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0105] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for replacing a blast furnace cooling wall, characterized in that: include: A feeding port communicating with the interior of the blast furnace is provided on the side wall of the blast furnace; Installing a chute on the outer wall of the blast furnace and aligning the chute with the feeding port to form a feeding channel; The cooling stave to be replaced is moved out of the blast furnace through the feeding channel, and the new cooling stave is moved into the blast furnace through the feeding channel and reinstalled.

2. The blast furnace cooling wall replacement method according to claim 1, characterized in that: The step of opening a feeding port in the side wall of the blast furnace and communicating with the interior of the blast furnace comprises: A first through hole is opened on the cooling wall to be replaced; wherein the inner wall of the blast furnace is installed with multiple layers of cooling sections arranged vertically, each cooling section includes multiple cooling walls, and along the direction from the furnace bottom to the furnace top, the multiple cooling walls included in the cooling sections of the sixth and seventh layers are the cooling walls to be replaced; A second through hole corresponding to the first through hole is opened on the furnace shell of the blast furnace to form the feeding port.

3. The blast furnace cooling stave replacement method according to claim 2, characterized in that: The step of opening a first through hole on the cooling wall to be replaced comprises: Draw a center line on at least two adjacent cooling walls to be replaced to divide the cooling walls into an upper half and a lower half; A first sub-through hole is provided in the lower half of at least two of the cooling walls, and at least two of the first sub-through holes are connected to form the first through hole.

4. The blast furnace cooling stave replacement method according to claim 1, characterized in that: The steps of moving the cooling stave to be replaced out of the blast furnace through the feeding channel, and moving the new cooling stave into the blast furnace through the feeding channel and reinstalling the cooling stave include: Building a construction platform below the cooling wall to be replaced; Lifting the crane to the construction platform; The cooling wall to be replaced is hoisted to the feeding channel by the crane to be removed from the blast furnace; The new cooling wall is transported to the construction platform through the feeding channel, and the cooling wall is reinstalled by the crane.

5. The blast furnace cooling stave replacement method according to claim 4, characterized in that: The step of building a construction platform in the blast furnace comprises: A main frame is fixedly installed in the blast furnace; Arranging a plurality of secondary beams along the circumference of the blast furnace, and connecting each of the secondary beams to the main frame to form a construction frame; A flat plate is laid on the construction frame to form the construction platform.

6. The blast furnace cooling stave replacement method according to claim 5, characterized in that: The steps of fixing and installing the main frame in the blast furnace include: Extending two or more main beams into the blast furnace through the tuyere in sequence; wherein the side wall of the blast furnace has a plurality of tuyere, and the plurality of tuyere are arranged at equal intervals along the circumference of the blast furnace; the two or more main beams are arranged side by side, and the two ends of each main beam are respectively located at different tuyere, and the two ends of each main beam extend out of the side wall of the blast furnace; A plurality of cross beams are welded to two or more main beams at intervals to form the main frame.

7. The blast furnace cooling wall replacement method according to claim 5, characterized in that: The step of arranging a plurality of secondary beams along the circumference of the blast furnace and connecting each of the secondary beams to the main frame to form a construction frame comprises: Extending a plurality of secondary beams into the blast furnace through the tuyere in sequence; wherein two ends of each secondary beam are respectively located in different tuyere, and two ends of each secondary beam extend out of the side wall of the blast furnace; A plurality of secondary beams are welded to the main frame to form the construction frame.

8. The method for replacing a blast furnace cooling stave according to claim 4, characterized in that: The step of hoisting the crane to the construction platform comprises: A first workbench is built on the construction platform, and a crane is hoisted to the first workbench.

9. The blast furnace cooling wall replacement method according to claim 8, characterized in that: The step of lifting the cooling stave to be replaced to the feeding channel by the crane to move it out of the blast furnace comprises: Building a second workbench on the construction platform; wherein the second workbench is located on one side of the first workbench; Lifting the first hook machine onto the second workbench, and lifting the second hook machine to a side of the first workbench away from the second workbench; The refractory material between the seventh layer of the cooling section and the furnace shell is chiseled out by the first hook machine, and the refractory material between the sixth layer of the cooling section and the furnace shell is chiseled out by the second hook machine.

10. The method for replacing a blast furnace cooling stave according to claim 9, characterized in that: The second workbench is higher than the first workbench.

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