CN109868334B - Lifting appliance for dismantling blast furnace surrounding pipe and dismantling method - Google Patents
Lifting appliance for dismantling blast furnace surrounding pipe and dismantling method Download PDFInfo
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- CN109868334B CN109868334B CN201910265558.5A CN201910265558A CN109868334B CN 109868334 B CN109868334 B CN 109868334B CN 201910265558 A CN201910265558 A CN 201910265558A CN 109868334 B CN109868334 B CN 109868334B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011449 brick Substances 0.000 claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 239000003921 oil Substances 0.000 claims abstract description 14
- 239000010721 machine oil Substances 0.000 claims abstract description 12
- 239000003973 paint Substances 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims description 6
- 239000011819 refractory material Substances 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 231100000817 safety factor Toxicity 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses a lifting appliance for dismantling a blast furnace surrounding pipe, wherein the surrounding pipe is of a polygonal structure formed by splicing steel plate coiled pipes, spray paint and refractory bricks are arranged in the surrounding pipe, the surrounding pipe is fixed by a plurality of groups of vertical hanging and horizontal pull rods through a surrounding pipe hanging platform and a furnace body frame column, the lifting appliance consists of a hydraulic lifting machine oil cylinder, an oil cylinder support, a steel hinge line and a pipe bracket, the hydraulic lifting machine oil cylinder is fixed on the surrounding pipe hanging platform through the oil cylinder support, and the positions of the hydraulic lifting machine oil cylinder are right above the surrounding pipe and are uniformly distributed along the circumference of the surrounding pipe; the hydraulic hoist cylinder is connected with a steel hinge wire, and the steel hinge wire vertically penetrates through the surrounding pipe provided with the through hole and is connected with the pipe bracket which is manufactured in a matched mode. The invention also discloses a method for dismantling the lifting appliance for dismantling the blast furnace surrounding pipe, which simplifies the construction process, greatly saves the construction time, and the dismantled surrounding pipe can fall to the tuyere platform integrally, so that the dismantling does not occupy the main line construction period, and the construction is safe.
Description
Technical Field
The invention relates to the technical field of blast furnace surrounding pipe construction, in particular to a lifting appliance for dismantling a blast furnace surrounding pipe and a dismantling method.
Background
The blast furnace enclosure pipe is of a polygonal structure formed by splicing steel plate coiled pipes, spray paint and refractory bricks are arranged in the blast furnace enclosure pipe, and the blast furnace enclosure pipe is fixed by a plurality of groups of vertical hanging and horizontal pull rods through an enclosure pipe hanging platform and a furnace body frame column. Hot air required by blast furnace ore smelting is generated by a hot blast furnace, is conveyed to a hot air surrounding pipe through a hot air main pipe, and enters the blast furnace through air supply branch pipes uniformly distributed on the surrounding pipe. When the enclosing pipe is dismantled, the enclosing pipe is internally provided with a refractory material, and the outside is provided with a platform, a middle-small sleeve and other water supply and drainage annular pipes, so that the weight is heavy, and bricks are required to be firstly taken off, and the platform and the pipeline attached to the enclosing pipe are dismantled. Because the sectional dismantling is unsafe, if the coating is further removed, the part to be dismantled of the surrounding pipe can fall to the tuyere platform integrally by using a winch, and usually, the part of the coating is considered to be removed, otherwise, the part can be dismantled only in multiple sections in the air.
When the blast furnace is overhauled, residual iron is put first, the furnace is taken off after cooling, the furnace body can be removed after one-time furnace taking off, the time for cooling and brick taking off the surrounding pipe is usually about three days earlier than the time for removing the furnace body to the position of the surrounding pipe hanging platform, if the surrounding pipe cannot be removed in time and the air outlet platform is transported, the condition that the surrounding pipe occupies the air outlet platform simultaneously with the furnace body removal can occur, the furnace body removal needs to be suspended, and the surrounding pipe is removed first, so that more main line construction period is occupied.
Disclosure of Invention
In order to solve the problems, the invention provides the lifting appliance for dismantling the blast furnace surrounding pipe and the dismantling method, the lifting appliance can be used for safely and integrally falling the surrounding pipe to the tuyere platform, the dismantling efficiency is high, and the surrounding pipe is dismantled without occupying the main line construction period.
The specific technical scheme of the invention is as follows: the lifting appliance consists of a hydraulic lifting machine oil cylinder, an oil cylinder support, a steel hinge line and a pipe bracket, wherein the hydraulic lifting machine oil cylinder is fixed on the surrounding pipe hanging platform through the oil cylinder support, and the hydraulic lifting machine oil cylinder is positioned right above the surrounding pipe and uniformly distributed along the circumference of the surrounding pipe; the hydraulic hoist cylinder is connected with a steel hinge wire, and the steel hinge wire vertically penetrates through the surrounding pipe provided with the through hole and is connected with the pipe bracket which is manufactured in a matched mode.
Further, the number of the lifting appliances is half of the number of the vertical hanging appliances.
Further, the through hole on the enclosing pipe is vertically formed by taking the intersection point of the axis of the oil cylinder and the enclosing pipe as the center.
Further, the pipe bracket and the surrounding pipe are fixed by spot welding.
The method for dismantling the lifting appliance for dismantling the blast furnace surrounding pipe comprises the following steps:
1) Dismantling an air supply branch pipe between the surrounding pipe and the furnace shell;
2) Brick holes are formed below the enclosing pipe;
3) According to the number of the vertical hanging halves of the enclosing pipe, hydraulic hoist cylinders and matched cylinder supports are arranged on the enclosing pipe hanging platform, and the hydraulic hoist cylinders are arranged right above the enclosing pipe and are approximately uniformly distributed along the periphery of the enclosing pipe;
4) Taking the intersection point of the axis of the oil cylinder and the enclosing pipe as the center, forming a vertical through hole on the enclosing pipe, firstly forming a hole with the diameter of about 700mm on the upper surface, and then forming a hole in the lower surface after brick scraping in the enclosing pipe, such as the hole;
5) After the bricks in the enclosure pipe are cooled, workers enter the enclosure pipe and take off the bricks from the upper half circumference to the lower half circumference, and the brick amount for taking off the enclosure pipe is reduced by more than half of the weight born by the enclosure pipe hanger;
6) A through hole below the enclosing pipe is formed, the refractory material at the position of the opening is removed before the opening, and the size of the formed through hole can be achieved by passing all steel strands of the oil cylinder of the hoister;
7) The steel hinge line of the lifting machine penetrates through the surrounding pipe with the vertical opening and is connected with the pipe bracket manufactured in a matched mode;
8) The pipe support is fixed with the surrounding pipe through spot welding, the steel hinge line is pre-tightened, the horizontal pull rod of the surrounding pipe is separated from the surrounding pipe, and then the pipe support vertically hung by the surrounding pipe is dismantled;
9) Pulling the lifting appliance through the numerical control hydraulic lifting machine to drop the whole enclosing pipe to the tuyere platform;
10 Sectioning the enclosing pipe on the tuyere platform, and cleaning out after crushing or directly transporting to a cast house for crushing.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the hydraulic lifting machine is used for integrally dismantling the enclosure pipe in cooperation with the lifting appliance, lifting lugs are not welded on the enclosure pipe hanging platform and the enclosure pipe during the dismantling process, the enclosure pipe platform and a water supply and drainage annular pipe on the enclosure pipe platform are not required to be dismantled in the air, the enclosure pipe hanging platform is not required to be reinforced, the spray paint in the enclosure pipe is not required to be removed, the refractory bricks are not required to be completely removed, the construction process is simplified, the construction time is greatly saved, the dismantled enclosure pipe can be integrally fallen to the air port platform, the dismantling process does not occupy a main line, and the construction is safe.
Drawings
FIG. 1 is a schematic view of a blast furnace bustle pipe according to the present invention;
FIG. 2 is a schematic view of the use of the spreader of the present invention;
FIG. 3 is a schematic view of the position of the spreader of the present invention;
1. the steel plate coiled pipe comprises a surrounding pipe, 2 steel plate coiled pipes, 3, spray paint, 4, refractory bricks, 5, a surrounding pipe platform, 6, vertical hanging, 7, a surrounding pipe hanging platform, 8, an air port platform, 9, a vertical hanging pipe bracket, 10, a furnace body steel frame, 11, a blast furnace shell, 12, a hydraulic hoist oil cylinder, 13, an oil cylinder support, 14, a steel strand and 15 pipe brackets.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples of the specification.
As shown in FIG. 1, the blast furnace enclosure pipe is of a polygonal structure formed by splicing steel plate coiled pipes, the spray coating material and refractory bricks are arranged in the blast furnace enclosure pipe, and the blast furnace enclosure pipe is fixed by a plurality of groups of vertical hanging and horizontal pull rods through an enclosure pipe hanging platform and a furnace body frame column.
The conventional methods for removing the surrounding pipe are as follows: one is to take off bricks and then to divide the bricks into sections to wind gap platforms according to hanging positions, such as 2500m 3 And (3) overhauling the blast furnace, wherein the enclosure pipe is divided into 16 sections according to 8 groups of vertical hangers, and is separated and transported out after falling to an air port platform. The other is to remove the spray paint after brick removal, control the weight within the hoisting capacity of the hoist, and drop the whole surrounding pipe to the tuyere platform, such as 2500m 3 After the blast furnace is overhauled and the brick is removed, half of the spray paint is removed, so that the removal weight is less than 120t. In any method, the dismantling of the surrounding pipe affects the construction period of the main line for more than 2 days, and for a blast furnace with larger volume, the scheme of dismantling by using a winch is not applicable any more due to the increase of dismantling weight.
The following embodiment provides a new enclosing pipe dismantling method, which is convenient to construct and saves construction period.
Example 1
As shown in fig. 1, 2 and 3, the enclosure pipe 1 is of a polygonal structure formed by splicing steel plate coiled pipes 2, the spray paint 3 and refractory bricks 4 are arranged in the enclosure pipe 1, and the enclosure pipe 1 is fixed by a plurality of groups of vertical hanging 6 and horizontal pull rods through an enclosure pipe hanging platform 7 and a furnace body steel frame 10. The lifting appliance for detaching the blast furnace surrounding pipe comprises a hydraulic lifting machine oil cylinder 12, an oil cylinder support 13, a steel hinge line 14 and a pipe bracket 15. The hydraulic hoist cylinders 12 are fixed on the surrounding pipe hanging platform 7 through cylinder supports 13, and the hydraulic hoist cylinders 12 are positioned right above the surrounding pipe 1 and uniformly distributed along the circumference of the surrounding pipe 1. The number of the lifting appliances in the embodiment is half of the number of the vertical hanging appliances 6 because the lifting appliances are matched with the dismounting method, and the dismounting method requires that bricks are firstly scraped to reduce the weight born by the vertical hanging appliances 6 of the surrounding pipe by half.
The through hole on the enclosing pipe 1 is vertically formed by taking the intersection point of the axis of the hydraulic lifting machine oil cylinder 12 and the enclosing pipe 1 as the center, the position of the hydraulic lifting machine oil cylinder 12 is right above the enclosing pipe 1, and the through hole is formed at the contact point most suitable recently. The hydraulic hoist cylinder 12 is connected with a steel hinge line 14, the steel hinge line 14 vertically penetrates through the enclosing pipe 1 provided with the through hole and is connected with a pipe support 15 which is manufactured in a matched mode, and meanwhile the pipe support 15 and the enclosing pipe 1 are fixed in a spot welding mode, so that a lifting appliance and the enclosing pipe 1 are fixed, and the enclosing pipe can be pulled in subsequent construction conveniently.
In combination with the lifting appliance, the lifting appliance removing method for removing the blast furnace surrounding pipe comprises the following steps:
1) Dismantling an air supply branch pipe between the surrounding pipe 1 and the blast furnace shell 11;
2) A brick hole is formed below the enclosing pipe 1 to prepare for subsequent brick scraping;
3) According to the number of the vertical hanging halves on the enclosing pipe 1, arranging hydraulic lifting machine cylinders 12 and matched cylinder supports 13 on the enclosing pipe hanging platform 7, wherein the hydraulic lifting machine cylinders 12 are positioned right above the enclosing pipe 1 and are approximately uniformly distributed along the periphery of the enclosing pipe 1;
4) Taking the intersection point of the axis of the hydraulic hoist cylinder 12 and the enclosing pipe 1 as the center, forming a vertical through hole on the enclosing pipe 1, firstly forming a hole with the diameter of about 700mm on the upper surface, and then forming a hole on the lower surface after the brick is blocked by the brick in the enclosing pipe to be taken off;
5) After the bricks in the enclosing pipe 1 are cooled, workers enter the enclosing pipe and take off the bricks from the upper half circumference to the lower half circumference, and the brick amount for taking off the enclosing pipe is reduced by more than half of the weight born by the vertical hanging 6 of the enclosing pipe;
the purpose of this step is that when the hydraulic hoist cylinders 12 arranged in a half number according to the vertical hanging 6 of the enclosure pipes work, the stress of the beams of the enclosure pipe hanging platform 7 is not increased, and the workload of reinforcing the platform beams is reduced.
6) A through hole below the enclosing pipe 1 is formed, the refractory material at the position of the opening is removed before the opening, and the size of the formed through hole can be through all steel strands 14 of the oil cylinder of the hoister;
7) The steel hinge line 14 of the hoist is penetrated, and the steel hinge line 14 of the hoist cylinder penetrates through the surrounding pipe 1 with the vertical opening and is connected with the pipe bracket 15 which is manufactured in a matched manner;
8) The pipe bracket 15 is fixed with the surrounding pipe 1 by spot welding, the steel hinge line 14 is pre-tightened, the horizontal pull rod of the surrounding pipe is separated from the surrounding pipe 1, and then the vertical hanging pipe bracket 9 is dismounted;
9) Pulling the lifting appliance through the numerical control hydraulic lifting machine to integrally drop the enclosure pipe 1 to the tuyere platform 8;
10 Sectioning the bustle pipe 1 on the tuyere platform 8, and cleaning out or directly transporting to a cast house for crushing after crushing.
Because the vertical hanging pipe bracket 9 is removed in the step 8), the lifting machine controls the lifting appliance to transport the enclosure pipe 1 downwards to the tuyere platform 8, the rest part of the vertical hanging is not required to be disassembled in the whole process, the enclosure pipe platform and the water supply and drainage annular pipe on the enclosure pipe platform are not required to be disassembled in the air, the reinforcement of the enclosure pipe hanging platform is not required, the spray paint in the enclosure pipe is not removed, all refractory bricks are not required to be removed, the whole dismantling process is rapid and convenient, the main line construction period is not occupied, and the construction is safe.
Example 2
Some 4000m using the slings and dismantling method of example 1 3 The blast furnace is overhauled, 8 groups of vertical hangers 6 are arranged on the surrounding pipe 1, the surrounding pipe hanging platform 7, the pipeline weight 110t, the spray paint 90t, the refractory bricks 680t, the total weight is about 880t, and the bricks are required to be taken off by 2/3 according to the weight halving method. According to hoisting weight 440t,8 groups of hoisting machines with 4 hydraulic hoisting machine oil cylinders are vertically hung, and in consideration of safety factors, 4 x 200t numerical control hydraulic hoisting machines are needed.
Because the construction unit only has TS100B-250 steel rope type numerical control hydraulic hoist, when in implementation, all refractory bricks are scraped, the actual hoisting weight is 300t, and after the whole surrounding pipe falls to the tuyere platform, the surrounding pipe is directly transported to a cast house in a segmented manner, and the normal dismantling of the furnace body is not influenced.
Example 3
Some 1080m of the lifting tool and the dismantling method in the embodiment 1 are adopted 3 The blast furnace is overhauled, 8 groups of surrounding pipes are vertically hung, the weight of the surrounding pipes, a surrounding pipe hanging platform and a pipeline is 50t, the total weight of the spray paint 45t, the refractory bricks 285t and the total weight of the spray paint is about 380t, and the bricks 190t are required to be taken off according to the method of halving the weight. Because the construction unit has the TS100B-250 steel rope type numerical control hydraulic elevator, only half of bricks are scraped during construction, the actual hoisting weight is 240t, and the whole surrounding pipe falls to the tuyere platform and is disassembled and transported out, the normal dismantling of the furnace body is not affected.
The embodiments have been described so as to facilitate a person of ordinary skill in the art in order to understand and apply the present technology, it will be apparent to those skilled in the art that various modifications may be made to these examples and that the general principles described herein may be applied to other embodiments without undue burden. Accordingly, the present application is not limited to the above embodiments, and those skilled in the art, based on the disclosure of the present application, should make improvements and modifications within the scope of the present application.
Claims (4)
1. The device comprises a lifting appliance for removing a blast furnace enclosure pipe, wherein the enclosure pipe (1) is of a polygonal structure formed by splicing steel plate coiled pipes (2), spray paint (3) and refractory bricks (4) are arranged in the enclosure pipe (1), and the enclosure pipe (1) is fixed by a plurality of groups of vertical hangers (6) and horizontal pull rods through an enclosure pipe hanging platform (7) and a furnace body steel frame column (10), and is characterized by comprising a hydraulic lifting cylinder (12), a cylinder support (13), steel strands (14) and a pipe bracket (15), wherein the hydraulic lifting cylinder (12) is fixed on the enclosure pipe hanging platform (7) through the cylinder support (13), and the positions of the hydraulic lifting cylinder (12) are right above the enclosure pipe (1) and are uniformly distributed along the periphery of the enclosure pipe (1); the hydraulic elevator oil cylinder (12) is connected with a steel hinge line (14), and the steel hinge line (14) vertically penetrates through the surrounding pipe (1) provided with the through hole and is connected with a pipe bracket (15) which is manufactured in a matching way;
the dismantling method is characterized by comprising the following steps:
1) Dismantling an air supply branch pipe between the surrounding pipe (1) and the blast furnace shell (11);
2) Brick holes are formed below the enclosing pipe (1);
3) According to the number of the vertical hanging parts (6) on the enclosing pipe (1), arranging hydraulic lifting machine oil cylinders (12) and matched oil cylinder supports (13) on an enclosing pipe hanging platform (7), wherein the hydraulic lifting machine oil cylinders (12) are positioned right above the enclosing pipe (1) and uniformly distributed along the periphery of the enclosing pipe (1);
4) Taking the intersection point of the axis of the hydraulic hoist cylinder (12) and the surrounding pipe (1) as the center, forming a vertical through hole on the surrounding pipe (1), firstly forming a hole with the diameter of 700mm on the upper surface, and then forming holes on the lower surface after brick scraping in the surrounding pipe, such as the hole on the lower surface;
5) After the bricks in the enclosing pipe (1) are cooled, workers enter the enclosing pipe (1) and take off the bricks from the upper half circle to the lower half circle, and the brick amount for taking off the enclosing pipe (1) is reduced by more than half of the weight born by the vertical hanging (6);
6) A through hole below the enclosing pipe (1) is formed, the refractory material at the position of the opening is removed before the opening, and the size of the formed through hole can be through all steel strands (14) of the oil cylinder of the lifting machine;
7) The steel hinge line (14) of the hoist is penetrated, and the steel hinge line (14) of the hoist cylinder penetrates through the surrounding pipe (1) with the vertical opening and is connected with the pipe bracket (15) which is manufactured in a matching way;
8) The pipe bracket (15) is fixed with the surrounding pipe (1) by spot welding, the steel hinge line is pre-tightened, the horizontal pull rod of the surrounding pipe is separated from the surrounding pipe (1), and then the vertically hung pipe bracket (9) is removed;
9) Pulling a lifting appliance through a numerical control hydraulic lifting machine to integrally drop the enclosure pipe (1) to an air port platform (8);
10 The enclosing pipe (1) is segmented on the tuyere platform (8), and is cleaned after being crushed or is directly conveyed to a cast house for being crushed.
2. The method for removing a blast furnace bustle pipe according to claim 1, wherein the number of hangers is half the number of vertical hangers (6).
3. The method for dismantling the blast furnace enclosing pipe according to claim 1, wherein the through hole on the enclosing pipe (1) is vertically formed by taking the intersection point of the axis of the hydraulic elevator cylinder (12) and the enclosing pipe (1) as the center.
4. The method for dismantling the blast furnace bustle pipe according to claim 1, characterized in that the pipe bracket (15) is fixed with the bustle pipe (1) by spot welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910265558.5A CN109868334B (en) | 2019-04-03 | 2019-04-03 | Lifting appliance for dismantling blast furnace surrounding pipe and dismantling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910265558.5A CN109868334B (en) | 2019-04-03 | 2019-04-03 | Lifting appliance for dismantling blast furnace surrounding pipe and dismantling method |
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| CN109868334A CN109868334A (en) | 2019-06-11 |
| CN109868334B true CN109868334B (en) | 2023-11-21 |
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| CN201910265558.5A Active CN109868334B (en) | 2019-04-03 | 2019-04-03 | Lifting appliance for dismantling blast furnace surrounding pipe and dismantling method |
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Families Citing this family (1)
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| CN110273039B (en) * | 2019-07-23 | 2023-11-14 | 安徽马钢设备检修有限公司 | Blast furnace surrounding pipe hoisting structure and installation method thereof |
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| CN106119454A (en) * | 2016-08-31 | 2016-11-16 | 中国十九冶集团有限公司 | Installation method of blast furnace hot air surrounding pipe |
| CN207362274U (en) * | 2017-10-20 | 2018-05-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of blast furnace bustle pipe prosthetic device |
| CN209702791U (en) * | 2019-04-03 | 2019-11-29 | 安徽马钢设备检修有限公司 | Suspender is used in a kind of dismounting of blast furnace bustle pipe |
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2019
- 2019-04-03 CN CN201910265558.5A patent/CN109868334B/en active Active
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| CN101397596A (en) * | 2008-09-12 | 2009-04-01 | 北京首钢建设集团有限公司 | Construction method for blast furnace bustle pipe integral installation |
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