CN108866267B - Construction method of ultra-large blast furnace swinging chute - Google Patents
Construction method of ultra-large blast furnace swinging chute Download PDFInfo
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- CN108866267B CN108866267B CN201810615544.7A CN201810615544A CN108866267B CN 108866267 B CN108866267 B CN 108866267B CN 201810615544 A CN201810615544 A CN 201810615544A CN 108866267 B CN108866267 B CN 108866267B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
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Abstract
The invention relates to a construction method of a swing chute of an ultra-large blast furnace; the method is characterized in that: preparing a temporary working platform; lifting the working platform to the position of the swing chute foundation by using a crane, fixing the working platform, putting up a springboard, and starting to process the foundation; after the basic treatment is finished, a swinging chute fixed support shaft is installed, a base of the support shaft is installed on an embedded part, and a trunnion is installed after spot welding is finished; installing a trunnion, namely installing the trunnion on a base, adjusting the precision of the trunnion by adjusting an adjusting gasket between the base and the trunnion, and adjusting the levelness of the trunnion by adopting a precision level gauge; after the trunnion is adjusted, fastening a bolt, welding a base on the embedded part, and finishing installation; fully welding all places needing to be welded to meet the requirements of drawings; and (4) after the movable working platform is dismantled, installing the next fixed support. The construction method improves the working efficiency of construction, reduces the cost, ensures the safety and shortens the construction period.
Description
Technical Field
The invention relates to the field of blast furnace construction, in particular to a construction method of a swing chute of an ultra-large blast furnace.
Background
At present, the smelting technology development of China makes great progress, which not only shows that the technical and economic indexes are obviously improved, but also shows that the equipment has rapid development, some of the technology enters the advanced ranks in the world, the pig iron yield is gradually increased along with the gradual upsizing of the furnace capacity of a blast furnace, the traditional mode of a single-track railway (automobile) hot metal ladle of a casting house is adopted originally, the requirement of blast furnace production cannot be met, and 1080m at home at present3The blast furnaces above all adopt a molten iron swinging launder to collect molten iron. During the construction of a traditional blast furnace, the installation of the swing chute needs to spend a large amount of manpower, material resources and financial resources, and simultaneously restricts the construction of other operations such as the installation of a dust removal pipeline in the swing chute area of a casting house, a heat insulation ceiling, spraying and the like.
Disclosure of Invention
The invention aims to provide a temporary detachable operation platform and a construction method thereof, which are used during construction of an ultra-large blast furnace swing chute, and have the advantages of simple structure, convenience in operation, small occupied area, high safety, good stability, high economical efficiency and the like.
In order to achieve the above object, the present invention is realized by:
a construction method of a swing chute of an ultra-large blast furnace comprises the following steps
step 2, hoisting the operation platform to the base position of the swing chute by using a crane, fixing the operation platform, and starting to work by putting up a springboard;
step 3, starting to process the foundation: the surface rust and concrete impurities of the embedded part are treated to be clean, so that the installation condition is achieved;
step 4, starting to install a swing chute fixed support shaft, firstly installing a base of the support shaft on an embedded part, and starting to install a trunnion after spot welding is completed;
step 5, installing the trunnion, namely installing the trunnion on a base, adjusting the precision of the trunnion by adjusting an adjusting gasket between the base and the trunnion, and adjusting by using a precision level gauge;
step 7, fastening bolts after the trunnion is adjusted, welding the base on the embedded part, completing the installation,
step 8, checking and accepting, and fully welding all places needing to be welded to meet the requirements of the drawing after the checking and accepting are successful;
and 9, after the movable operation platform is detached, mounting the next fixed support.
According to the construction method, under the condition that the safety of operators can be guaranteed, the original method for installing the swing chute fixed support shaft by erecting a full fastener type scaffold is eliminated, and the swing chute fixed support shaft is installed by adopting a novel detachable platform method, so that the working efficiency of construction is improved, the cost is reduced, the safety is guaranteed, and the construction period is shortened.
Drawings
FIG. 1 is a first schematic view of the construction method.
FIG. 2 is a second schematic view of the construction method.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in figures 1 and 2, the construction method of the swing chute of the ultra-large blast furnace comprises the following steps
step 2, hoisting the operation platform 1 to the base position of the swing chute by using a crane, fixing the operation platform 1, and starting to work by putting up a springboard;
step 3, starting to process the foundation: the surface rust and concrete impurities of the embedded part are treated to be clean, so that the installation condition is achieved;
step 4, starting to install a swing chute fixed support shaft, firstly installing a base of the support shaft on an embedded part, and starting to install a trunnion after spot welding is completed;
step 5, installing the trunnion, namely installing the trunnion on a base, adjusting the precision of the trunnion by adjusting an adjusting gasket between the base and the trunnion, and adjusting by using a precision level gauge;
step 7, fastening bolts after the trunnion is adjusted, welding the base on the embedded part, completing the installation,
step 8, checking and accepting, and fully welding all places needing to be welded to meet the requirements of the drawing after the checking and accepting are successful;
and 9, detaching the movable operation platform 1, and then installing the next fixed support.
According to the construction method, under the condition that the safety of operators can be guaranteed, the original method for installing the swing chute fixed support shaft by erecting a full fastener type scaffold is eliminated, and the swing chute fixed support shaft is installed by adopting a novel detachable platform method, so that the working efficiency of construction is improved, the cost is reduced, the safety is guaranteed, and the construction period is shortened.
Claims (1)
1. A construction method of an ultra-large blast furnace swinging chute is characterized by comprising the following steps:
step 1, preparing a temporary operation platform: the frame is made of angle iron, the springboard is fully paved, the double-channel anti-falling handrails are made of round steel around the frame, a worker can safely climb up and down the ladder on one side of the platform, the platform can move from a molten iron ditch to an operation platform, a gap bridge is erected between supports of the chute in a left-right swinging mode, the movable detachable handrails are arranged, the operation platform is communicated, and when the movable anti-falling handrail is installed, a field constructor can safely complete the installation of the fixed supporting shaft when standing on the platform; bolts are welded at the place where the operation platform is fixedly lapped on the foundation, so that the operation platform is convenient to install and dismantle;
step 2, hoisting the operation platform to the base position of the swing chute by using a crane, fixing the operation platform, and starting to work by putting up a springboard;
step 3, starting to process the foundation: the surface rust and concrete impurities of the embedded part are treated to be clean, so that the installation condition is achieved;
step 4, starting to install a swing chute fixed support shaft, firstly installing a base of the support shaft on an embedded part, and starting to install a trunnion after spot welding is completed;
step 5, installing the trunnion, namely installing the trunnion on a base, adjusting the precision of the trunnion by adjusting an adjusting gasket between the base and the trunnion, and adjusting by using a precision level gauge;
step 7, fastening bolts after the trunnion is adjusted, welding the base on the embedded part, completing the installation,
step 8, checking and accepting, and fully welding all places needing to be welded to meet the requirements of the drawing after the checking and accepting are successful;
and 9, after the movable operation platform is detached, mounting the next fixed support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615544.7A CN108866267B (en) | 2018-06-14 | 2018-06-14 | Construction method of ultra-large blast furnace swinging chute |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615544.7A CN108866267B (en) | 2018-06-14 | 2018-06-14 | Construction method of ultra-large blast furnace swinging chute |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108866267A CN108866267A (en) | 2018-11-23 |
| CN108866267B true CN108866267B (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810615544.7A Active CN108866267B (en) | 2018-06-14 | 2018-06-14 | Construction method of ultra-large blast furnace swinging chute |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2298388A1 (en) * | 1975-01-27 | 1976-08-20 | Kaiser Electro Refractaire | METHOD AND DEVICE FOR THE TRIMMING BY PROJECTION OF VARIOUS WALLS |
| DE3624266A1 (en) * | 1986-07-18 | 1988-01-21 | Gutehoffnungshuette Man | Apparatus for exchanging main tapping launders on blast furnaces |
| CN201459160U (en) * | 2009-07-07 | 2010-05-12 | 中冶南方工程技术有限公司 | Novel melted iron swinging launder |
| CN201990689U (en) * | 2011-02-14 | 2011-09-28 | 中冶赛迪工程技术股份有限公司 | Large-size swinging launder |
| CN207210463U (en) * | 2017-07-25 | 2018-04-10 | 安阳钢铁股份有限公司 | The horizontal hunting groove that a kind of large blast furnace residual iron placing uses |
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2018
- 2018-06-14 CN CN201810615544.7A patent/CN108866267B/en active Active
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