CN112048584A - Installation method of modular blast furnace in-situ large-scale maintenance shed - Google Patents
Installation method of modular blast furnace in-situ large-scale maintenance shed Download PDFInfo
- Publication number
- CN112048584A CN112048584A CN202010837873.3A CN202010837873A CN112048584A CN 112048584 A CN112048584 A CN 112048584A CN 202010837873 A CN202010837873 A CN 202010837873A CN 112048584 A CN112048584 A CN 112048584A
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- China
- Prior art keywords
- shed
- bracket
- blast furnace
- mounting
- protection shed
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/30—Safety or protective measures preventing damage to building parts or finishing work during construction against mechanical damage or dirt, e.g. guard covers of stairs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D2001/1605—Repairing linings
Abstract
The invention provides an installation method of a modular blast furnace in-situ large-scale maintenance protective shed, which comprises the following steps: after the middle section cooling wall is installed, a full-hall fast scaffold is erected to perform pointing on the cooling wall, and when the cooling wall is installed to the height, a bracket and a main beam of the protection shed are sequentially hung on the full-hall fast scaffold by a crane; on the full-hall quick scaffold, mounting a bracket of a protective shed at an inflection point of a blast furnace shell; hoisting a main beam of the protection shed onto the bracket, gradually installing the main beam to form a protection shed frame, leveling the bracket, and welding and fixing the bracket and the main beam to complete the installation of the protection shed main beam frame; after the installation of the main beam frame of the protection shed is finished, other components of the protection shed are installed in sequence. According to the invention, after the middle section cooling wall is installed, full-hall rapid scaffolds are erected to perform pointing on the cooling wall, and the existing full-hall scaffolds are used as construction platforms to assemble the protection shed.
Description
Technical Field
The invention relates to the technical field of metallurgical engineering, in particular to an installation method of a modular blast furnace in-situ large maintenance protective shed.
Background
At present, in the domestic iron and steel industry, because a blast furnace body is in a high-temperature environment for a long time, furnace shells at the positions of a furnace belly and a furnace hearth and cooling equipment in the furnace shells are most easily damaged. Each blast furnace is therefore essentially subjected to minor, intermediate and major repair stages.
As known to those skilled in the art, the overhaul of the blast furnace has the characteristics of short construction period and large building amount, and because the building amount of the blast furnace is large during building and the building construction is difficult, especially because the sizes of the taphole and the tuyere are small, some precast blocks cannot enter the furnace from the taphole and the tuyere, the material entering the furnace becomes a difficult problem in construction.
In order to solve the problem, the traditional method adopts a furnace belly protective shed to carry out furnace masonry and feeding, then a winch is adopted to hang a precast block downwards to the furnace bottom for masonry, and after the protective shed above the furnace belly is removed, a scaffold is built in the furnace to build the furnace belly to a furnace throat weather-resistant material.
However, at present, the safety of the installation and operation of the protection shed is not enough, and safety accidents are easy to occur.
Disclosure of Invention
In view of the above, the invention provides an installation method of a modular blast furnace in-situ large-scale maintenance shed, and aims to solve the problem of insufficient safety of the existing protection shed in installation and operation.
The invention provides an installation method of a modular blast furnace in-situ large-scale maintenance protective shed, which comprises the following steps: a pretreatment step, namely dividing a blast furnace shell into a lower section, a middle section and an upper section, then installing a cooling wall, after the middle section cooling wall is installed, erecting a full-space quick scaffold to perform pointing on the cooling wall, and sequentially hoisting corbels and a main beam of a protection shed onto the full-space quick scaffold by using a crane until the cooling wall is installed; a bracket initial installation step, namely installing the bracket of the protective shed at the inflection point of the blast furnace shell on the full-hall quick scaffold; after the bracket of the protection shed is initially installed, hoisting the main beam of the protection shed onto the bracket, gradually installing the main beam to form a protection shed frame, leveling the bracket, and welding and fixing the bracket and the main beam to complete the protection shed main beam frame; and a component mounting step, namely sequentially mounting other components of the protection shed after the main beam frame of the protection shed is mounted.
Further, in the method for installing the modular blast furnace in-situ large-scale maintenance shed, in the step of installing the components, the installation sequence of other components of the protection shed sequentially comprises the following steps: mounting a secondary beam → mounting a ring beam → mounting a central shaft → mounting a walking trolley → mounting a rotating beam → mounting a plank → mounting a peripheral ring plate → mounting a rotating beam and an electric hoist.
Further, according to the installation method of the modular blast furnace in-situ large-scale maintenance protective shed, the central shaft installation specifically comprises the following steps: and the central shaft is arranged on the main shaft at the central position of the protective shed.
Further, according to the installation method of the modular blast furnace in-situ large repair protection shed, the annular beam is arranged along the circumferential direction of the protection shed, and the annular beam is fixed on the main beam and the secondary beam.
Further, according to the installation method of the modular blast furnace in-situ overhaul protective shed, the installation body of the rotating beam is as follows: the walking trolley is provided with a rotating beam, one end of the rotating beam is connected to the walking trolley, the other end of the rotating beam is arranged on the central shaft, and the walking trolley walks along the annular beam to drive the rotating beam to rotate around the central shaft.
Further, according to the installation method of the modular blast furnace in-situ large-scale maintenance shed, the installation of the peripheral ring plate specifically comprises the following steps: a circle of peripheral ring plate is arranged on the periphery of the plank along the circumferential direction of the plank to shield rain.
Further, in the method for installing the modular blast furnace in-situ overhaul protective shed, in the step of initially installing the bracket, the top steel plate of the bracket is inserted into the circular seam of the cooling wall at the junction between the furnace belly and the furnace waist, and the bracket is tightly attached to the brick-inlaid hot surface of the cooling wall.
Further, in the method for installing the modular blast furnace in-situ large-scale maintenance shed, in the initial bracket installation step, rubber sheets are laid between the brackets and the brick-inlaid hot surfaces of the cooling walls.
Further, the method for installing the modular blast furnace in-situ large-scale maintenance shed further comprises the following steps after the step of installing the components: and a test step, carrying out a load test on the installed protection shed.
Further, after the testing step, the method for installing the modular blast furnace in-situ large repair protection shed further comprises the following steps: and a checking step, namely performing test run and check acceptance on the protection shed.
According to the installation method of the modular blast furnace in-situ large-scale maintenance shed, after the middle section cooling wall is installed, full-hall rapid scaffolds are erected to perform pointing on the cooling wall, the existing full-hall scaffolds are used as construction platforms, the brackets and the main beams of the protection shed are sequentially hung into the full-hall scaffolds by using a crane to be assembled, and the protection shed is assembled and has the characteristics of high assembling speed, high safety and the like. Meanwhile, the mounting method has the advantages of high operation safety, convenience and rapidness in construction, controllable process, high corbel leveling precision and the like, and the stability of the protective shed is ensured.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a block flow diagram of an installation method of a modular blast furnace in-situ large maintenance shed according to an embodiment of the present invention;
FIG. 2 is a front view of a protective shelter in accordance with an embodiment of the present invention;
fig. 3 is a top view of a protection shed according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, it is a block flow diagram of an installation method of an in-situ large maintenance shed of a modular blast furnace according to an embodiment of the present invention. As shown in the figure, the installation method comprises the following steps:
and a preprocessing step S1, namely, dividing the blast furnace shell into a lower section, a middle section and an upper section, installing the cooling wall, erecting a full-hall quick scaffold to perform jointing on the cooling wall after the middle section cooling wall is installed, and sequentially hoisting the bracket and the girder of the protection shed onto the full-hall quick scaffold by using a crane until the cooling wall is installed at a height.
Specifically, firstly, a modular blast furnace is subjected to in-situ overhaul to divide a blast furnace shell into a lower section, a middle section and an upper section, and a protective shed is arranged on the middle section of the blast furnace shell; and then, after the middle-section cooling wall is installed, setting up a full-hall fast scaffold to perform pointing on the cooling wall, and when the cooling wall reaches the installation height, using the existing full-hall scaffold as a construction platform, and sequentially hoisting the bracket and the girder of the protection shed into the full-hall scaffold by using a crane so as to assemble the bracket and the girder of the protection shed. The existing full framing scaffold is used as a construction platform, and the cooling wall pointing scaffold is used as the construction platform to assemble the protection shed, so that the protection shed has the characteristics of high assembling speed, high safety and the like.
And a bracket initial installation step S2, wherein the bracket of the protective shed is installed at the inflection point of the blast furnace shell on the full-hall quick scaffold.
Specifically, the mounting position of the bracket of the protection shed can be at the inflection point of the blast furnace shell, and each bracket hoisted on the full-hall quick scaffold can be uniformly mounted at the inflection point of the blast furnace shell along the circumferential direction of the blast furnace shell on the full-hall quick scaffold. The mounting position of the corbels of the protection shed can be the junction between the furnace belly and the furnace waist, the junction is an area with the largest diameter of the blast furnace, and the diameter of the furnace is smaller after the cooling wall is mounted, so that the method of completely assembling the protection shed and then integrally hoisting the protection shed is not feasible, and all parts are required to be sequentially mounted; of course, the installation position of the corbel may also be the inflection point of other blast furnace shells, and this embodiment does not limit this. In order to realize the initial installation of the bracket, preferably, the top steel plate of the bracket is inserted into the circular seam of the cooling wall at the junction between the furnace belly and the furnace waist, and the bracket is tightly attached to the brick-inlaid hot surface of the cooling wall; further preferably, a rubber sheet with the thickness of 5mm can be fully paved between the bracket and the hot surface of the cooling wall inlaid brick to prevent the bracket from damaging the inlaid brick; that is to say, also insert the top steel sheet of bracket in the stave circumferential weld of juncture between furnace belly, the furnace waist earlier, then, can full-spread 5mm thick rubber skin between the bracket inlays the brick hot side with the stave, finally, with the bracket with inlay the brick hot side laminating closely to accomplish the primary erection of bracket. In this embodiment, the protection canopy sets up 8 corbels altogether, and it is along the circumference interval evenly distributed of protection canopy.
And a girder mounting step S3, after the bracket of the protection shed is preliminarily mounted, hoisting the girder of the protection shed onto the bracket, gradually mounting the girder to form a protection shed frame, leveling the bracket, and welding and fixing the bracket and the girder to complete the protection shed girder frame.
Specifically, after the bracket is tightly attached to the brick-inlaid hot surface of the cooling wall, the main beam of the protection shed is hoisted on the bracket and is gradually installed, and a protection shed frame is formed; then, leveling the corbels of the protection shed, and controlling the integral levelness of 8 corbels within 15 mm; and finally, leveling the corbels, tightly adhering and fixing the corbels and the hot surfaces of the inlaid bricks, connecting 8 corbels and the main beam into a whole in a welding mode, and finishing the installation of the main beam frame of the protection shed after the welding is finished.
In the member mounting step S4, after the mounting of the main beam frame of the protection shed is completed, the other members of the protection shed are sequentially mounted.
Specifically, after the main beam frame of the protection shed is installed, other components of the protection shed are installed; wherein, other component installation orders of protection canopy can be in proper order: secondary beam mounting → ring beam mounting → central shaft mounting → traveling trolley mounting → rotary beam mounting → plank mounting → peripheral ring plate mounting → rotary beam electric block mounting, that is, as shown in fig. 2 to 3, the secondary beam 2 is mounted on the primary beam 1 to reinforce the stability; the ring-shaped beam 3 is fixed on the main beam 1, the ring-shaped beam 3 is arranged along the circumferential direction of the protective shed, and meanwhile, the ring-shaped beam 3 and the secondary beam 2 can also be connected through a connecting piece; a central shaft 4 is arranged on the main beam 1 through a channel steel at the central position of the protective shed; a travelling trolley 5 is arranged on the annular beam 3, a rotating beam 6 is arranged on the travelling trolley 5, one end of the travelling trolley 5 is connected to the travelling trolley 5, the other end of the travelling trolley 5 is arranged on the central shaft 4, and the travelling trolley 5 moves along the annular beam 3 to drive the rotating beam 6 to rotate around the central shaft; then, a plank beam arranged side by side with the main beam 1 is arranged between the main beam 1 and the secondary beam 2 to ensure the stress uniformity of the plank, and the planks are laid on the main beam, the secondary beam and the plank beam, and a circle of peripheral ring plates can be arranged on the periphery of the planks along the circumferential direction of the planks to shield rain and prevent rainwater from entering the lower part of the protection shed; finally, the electric hoist 7 can be installed on the rotating beam 6 for hoisting, and omnibearing hoisting and transportation in the blast furnace can be realized.
And a test step S5, carrying out a load test on the installed protection shed.
Specifically, after the installation of the protection shed is completed, the protection shed after the installation is subjected to a load experiment, so that the stability of the protection shed is ensured.
And an acceptance step S6, performing trial run acceptance on the protection shed before the protection shed is put into use.
Specifically, after the protection shed is qualified in the load test and before the protection shed is put into use, the protection shed is subjected to test run and acceptance to ensure the stability of subsequent use.
In summary, according to the installation method of the modular blast furnace in-situ large-scale maintenance shed provided by the embodiment, after the middle-section cooling wall is installed, full-hall fast scaffolds are erected to perform jointing on the cooling wall, the existing full-hall scaffolds are used as construction platforms, the brackets and the main beams of the protection shed are sequentially hung into the full-hall scaffolds by using the crane to be assembled, and the method has the characteristics of high assembling speed, high safety and the like when the protection shed is assembled. Meanwhile, the mounting method has the advantages of high operation safety, convenience and rapidness in construction, controllable process, high corbel leveling precision and the like, and the stability of the protective shed is ensured.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such 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 such modifications and variations.
Claims (10)
1. The installation method of the modular blast furnace in-situ large maintenance protection shed is characterized by comprising the following steps:
a pretreatment step, namely dividing a blast furnace shell into a lower section, a middle section and an upper section, then installing a cooling wall, after the middle section cooling wall is installed, erecting a full-space quick scaffold to perform pointing on the cooling wall, and sequentially hoisting corbels and a main beam of a protection shed onto the full-space quick scaffold by using a crane until the cooling wall is installed;
a bracket initial installation step, namely installing the bracket of the protective shed at the inflection point of the blast furnace shell on the full-hall quick scaffold;
after the bracket of the protection shed is initially installed, hoisting the main beam of the protection shed onto the bracket, gradually installing the main beam to form a protection shed frame, leveling the bracket, and welding and fixing the bracket and the main beam to complete the protection shed main beam frame;
and a component mounting step, namely sequentially mounting other components of the protection shed after the main beam frame of the protection shed is mounted.
2. The method for installing an in-situ overhaul protective shed of a modular blast furnace as claimed in claim 1,
in the component mounting step, the mounting sequence of other components of the protection shed is as follows: mounting a secondary beam → mounting a ring beam → mounting a central shaft → mounting a walking trolley → mounting a rotating beam → mounting a plank → mounting a peripheral ring plate → mounting a rotating beam and an electric hoist.
3. The method for installing an in-situ overhaul protective shed of a modular blast furnace as claimed in claim 2,
the central shaft installation specifically comprises: and the central shaft is arranged on the main shaft at the central position of the protective shed.
4. The method for installing an in-situ overhaul protective shed of a modular blast furnace as claimed in claim 2,
the annular beam is arranged along the circumferential direction of the protective shed, and the annular beam is fixed on the main beam and the secondary beam.
5. The method for installing an in-situ overhaul protective shed of a modular blast furnace as claimed in claim 2,
the rotating beam mounting body is as follows: the walking trolley is provided with a rotating beam, one end of the rotating beam is connected to the walking trolley, the other end of the rotating beam is arranged on the central shaft, and the walking trolley walks along the annular beam to drive the rotating beam to rotate around the central shaft.
6. The method for installing an in-situ overhaul protective shed of a modular blast furnace as claimed in claim 2,
the installation of the peripheral ring plate is specifically as follows: a circle of peripheral ring plate is arranged on the periphery of the plank along the circumferential direction of the plank to shield rain.
7. The method for installing modular blast furnace in-situ overhaul protective sheds according to any one of claims 1 to 6,
in the initial installation step of the bracket, the top steel plate of the bracket is inserted into the cooling wall circular seam at the junction between the furnace belly and the furnace waist, and the bracket is tightly attached to the hot surface of the cooling wall inlaid brick.
8. The method for installing an in-situ overhaul protective shed of a modular blast furnace as claimed in claim 7,
in the bracket initial installation step, rubber is paved between the bracket and the hot surface of the cooling wall inlaid brick.
9. The method for installing modular blast furnace in-situ overhaul protective sheds according to any one of claims 1 to 6, further comprising the following steps after the component installation step:
and a test step, carrying out a load test on the installed protection shed.
10. The method for installing modular blast furnace in-situ overhaul protective sheds according to any one of claims 1 to 6, further comprising the following steps after the testing step:
and a checking step, namely performing test run and check acceptance on the protection shed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837873.3A CN112048584A (en) | 2020-08-19 | 2020-08-19 | Installation method of modular blast furnace in-situ large-scale maintenance shed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010837873.3A CN112048584A (en) | 2020-08-19 | 2020-08-19 | Installation method of modular blast furnace in-situ large-scale maintenance shed |
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| CN112048584A true CN112048584A (en) | 2020-12-08 |
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| CN202010837873.3A Pending CN112048584A (en) | 2020-08-19 | 2020-08-19 | Installation method of modular blast furnace in-situ large-scale maintenance shed |
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Application publication date: 20201208 |