CN110669898B - Method for replacing 120-ton converter chute - Google Patents
Method for replacing 120-ton converter chute Download PDFInfo
- Publication number
- CN110669898B CN110669898B CN201911085833.1A CN201911085833A CN110669898B CN 110669898 B CN110669898 B CN 110669898B CN 201911085833 A CN201911085833 A CN 201911085833A CN 110669898 B CN110669898 B CN 110669898B
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- Prior art keywords
- chute
- pipe
- hoist
- new
- replacing
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 2
- 230000005484 gravity Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 210000001503 joint Anatomy 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 241000406668 Loxodonta cyclotis Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4653—Tapholes; Opening or plugging thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a method for replacing a 120-ton converter chute, which is characterized in that when an old chute is dismantled, a cutting line of a blanking pipe above the chute is cut into the direction of vertical gravity, a chute of a new chute is cut into the position of the cutting line of an original chute below the chute, and the adjustment and butt joint are carried out after the chute is hoisted, wherein the adjustment in the horizontal direction is firstly carried out, then the adjustment in the direction of a gravity vertical line is carried out, and the positioning is accurate. The method is simple, convenient to control, capable of achieving whole replacement work within 20 hours and 12 people in two shifts within a short period by means of online installation after offline preparation, high in replacement efficiency and beneficial to popularization.
Description
Technical Field
The invention belongs to the technical field of maintenance of steel-making machinery, and particularly relates to a method for replacing a 120-ton converter chute.
Background
In a steelmaking production line of a metallurgical enterprise, a flue above a 120-ton converter body is a moving section flue, the south and north sides of the moving section flue are blanking pipes, and the blanking pipes are connected with the south and north chutes. During the steel-making production process, ores such as bulk materials enter a converter through a chute to be smelted and the like. In actual production, the online operation life of the chute spare parts is generally about 2 months, and after the service life period is reached, the chute spare parts need to be replaced by new chutes periodically to meet production requirements.
The chute is in 23 meters steel structure platform below, and inner space is comparatively narrow, under general condition, demolishs the interior carriage apron and the elephant trunk of chute at 18 meters platform, and the level is transported to the open space of 18 meters platform on, transports the interior carriage apron and the elephant trunk of new chute again and installs, and single change time needs 24 hours, and 20 people divide two classes to fall and accomplish the maintenance task. The long-time furnace shutdown seriously affects the production rhythm.
In addition, after the platform steel plate is detached, the chute is hung by using a travelling crane and a steel wire rope, then the chute is cut by using tools such as gas cutting and the like, and a cutting line is perpendicular to the blanking pipe and the chute, as shown in fig. 3 and 4, bidirectional multiple adjustment needs to be carried out in the direction of a gravity vertical line and the horizontal direction, centering is difficult, and particularly in the hoisting process, the difficulty of multiple adjustment is high, the positioning cannot be accurately adjusted at one time, and the consumed time is long. The number of personnel is higher, and intensity of labour increases correspondingly, and efficiency is extremely low.
At present, no low-cost device or method exists, and the problems that the replacement and maintenance time is long, the number of operating personnel is large, the efficiency is low and the production is influenced due to the narrow space of the converter chute can be solved.
Disclosure of Invention
The invention aims to provide a method for replacing a 120-ton converter chute, which is high in efficiency, low in cost, safe and effective, and the chute can be smoothly detached and installed.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for replacing a 120-ton converter chute comprises the following steps:
1) blowing out the furnace, removing slag, cleaning accumulated dust near the chute, removing a 23 m platform steel plate above the chute, and reserving a hoisting channel;
2) the hoisting block is fixed on a chute of the chute in advance and hung on a lifting hook of the high-span travelling crane;
3) drawing a plumb line on the position where the chute pipe is combined with the blanking pipe, clearly marking, and cutting and separating the chute pipe and the blanking pipe along the plumb line in an electric welding mode;
4) the connection between the sleeve and the inner slide carriage is removed by matching with a hoist, and the slide carriage and the inner slide carriage of the chute are hoisted out of the space of the chute by using a high-span crane;
5) arranging a hanging nose at the top of the new processed slide pipe, hanging the hanging nose on a high-span traveling crane with a hoist, and hanging the hanging nose to the approximate positions of the original slide pipe and the inner slide plate; the hoist block is used for adjusting the angle between the chute and the inner chute;
6) adjusting the hoist to enable the chute and the inner chute plate to reach a horizontal angle and a horizontal position before dismantling, moving the chute and the inner chute plate up and down in the direction of the plumb line, and aligning the chute with the blanking pipe while the inner chute plate is deep into the sleeve;
7) welding and reinforcing the joint of the chute and the blanking pipe, and installing a connecting sleeve and an inner chute plate; the connection between the hoist and the chute is dismantled, and the high-span traveling crane is moved away; the reinforcing slide pipe is connected with the blanking pipe, and the reinforcing sleeve is connected with the inner slide plate;
8) and (5) recovering the 23 m platform steel plate above the chute, and taking a trial run.
Specifically, the method for processing the new chute in the step 5) comprises the following steps: measuring the sizes of the old chute and the inner chute, measuring the size from the position of the notch of the feeding pipe to the chute, cutting the new chute and the inner chute according to the measured size, and enabling the notch to be meshed with the position of the feeding pipe on the wire.
Preferably, the treatment of the new chute can be synchronized with step 4) in order to save time.
The invention has the following beneficial effects: according to the replacing method, when an old chute is dismounted, the cutting line of the blanking pipe above the chute is cut into the direction of vertical gravity in advance, the chute of a new chute is cut into the position of the cutting line of the original chute below the line, the adjustment and butt joint are carried out after the lifting, the horizontal direction adjustment is carried out firstly, then the adjustment of the direction of the vertical gravity is carried out, and the positioning is accurate. The method is simple, convenient to control, capable of achieving whole replacement work within 20 hours and 12 people in two shifts within a short period by means of online installation after offline preparation, high in replacement efficiency and beneficial to popularization.
Drawings
FIG. 1 is a schematic diagram of a chute position of a 120 ton rotary kiln;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
FIG. 3 is a schematic diagram of a 120 ton converter chute cutting position of the prior art;
FIG. 4 is a schematic illustration of the removal and installation of a 120 ton converter chute of the prior art;
FIG. 5 is a schematic view of a 120 ton converter chute cutting removal position of the present invention;
FIG. 6 is a schematic illustration of the removal and installation of a 120 ton converter chute of the present invention;
wherein, 1, moving the segment flue; 2. an oxygen gun port; 3. a chute; 301. a south chute; 302. a north chute; 31. a sleeve; 32. an inner slide carriage; 33. a cecal tube; 34. a chute; 4. a discharging pipe; 5. fixing a section of flue; 6. high-span traveling crane.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the scope of the present invention is not limited to these examples. All changes, modifications and equivalents that do not depart from the spirit of the invention are intended to be included within the scope thereof.
As shown in fig. 1 and 2, the 120-ton converter chute replacement method includes the following steps:
1) blowing out and slagging, cleaning accumulated dust near the chute 3, removing a 23 m platform steel plate above the chute 3, and reserving a hoisting channel.
2) The hoist block is fixed on the chute 34 of the chute 3 in advance and hung on the hook of the high-span traveling crane 6.
3) The part where the chute 34 is combined with the blanking pipe 4 is marked with a heavy vertical line, and the chute 34 and the blanking pipe 4 are cut and separated by an electric welding way along the heavy vertical line, as shown in figure 5.
4) The connection between the sleeve 31 and the inner slide carriage 32 is removed by matching with a hoist, and the chute 34 and the inner slide carriage 32 of the chute are hoisted out of the space by using a high-span crane.
5) The new chute 34 is treated as follows: the dimensions of the old chute 34 and the inner chute 32 are measured, the cut-out position of the down pipe 4 is measured to the dimensions of the chute 34, and the new chute 34 and the inner chute 32 are cut according to the measured dimensions, the cut-out being engaged with the position of the down pipe 4 on the line. To save time, the processing of the new chute 34 can be synchronized with step 4). Arranging a hanging nose at the top of the new processed chute 34, hanging the new processed chute on a high-span traveling crane 6 with a hoist, and hanging the new processed chute to the approximate positions of the original chute 34 and the inner chute 32; the hoist block is used for adjusting the angle of the chute 34 and the inner chute 32.
6) The hoist block is adjusted to make the chute 34 and the inner chute 32 reach the horizontal angle and the horizontal position before the removal.
7) The hoist block is adjusted to move the chute 34 and the inner chute 32 up and down in the direction of the plumb line, and the chute 34 is aligned with the blanking pipe 4 while the inner chute 32 is inserted into the casing 31, as shown in fig. 6.
8) The joint of the reinforcing slide pipe 34 and the blanking pipe 4 is welded, and the connection of the sleeve 31 and the inner slide plate 32 is installed.
9) The connection between the hoist and the chute 34 is dismantled, and the high-span traveling crane 6 is moved away.
10) The connection of the reinforcing chute 34 with the blanking pipe 4, the connection of the reinforcing sleeve 31 with the inner chute 32.
11) The 23 m platform steel plate above the chute was recovered.
12) And (6) trial run.
When an old chute is dismantled, the cutting line of the blanking pipe 4 above the chute 3 is cut into the direction of vertical gravity in advance, the chute 34 of a new chute is cut into the cutting line position of the original chute 34 under the line, the adjustment and butt joint are carried out after the hoisting, the horizontal direction adjustment is carried out firstly, the adjustment of the direction of the vertical line of gravity is carried out again, and the positioning is accurate.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (3)
1. A method for replacing a 120-ton converter chute is characterized by comprising the following steps:
1) blowing out the furnace, removing slag, cleaning accumulated dust near the chute, removing a 23 m platform steel plate above the chute, and reserving a hoisting channel;
2) the hoisting block is fixed on a chute of the chute in advance and hung on a lifting hook of the high-span travelling crane;
3) drawing a plumb line on the position where the chute pipe is combined with the blanking pipe, clearly marking, and cutting and separating the chute pipe and the blanking pipe along the plumb line in an electric welding mode;
4) the connection between the sleeve and the inner slide carriage is removed by matching with a hoist, and the slide carriage and the inner slide carriage of the chute are hoisted out of the space of the chute by using a high-span crane;
5) arranging a hanging nose at the top of the new processed slide pipe, hanging the hanging nose on a high-span traveling crane with a hoist, and hanging the hanging nose to the approximate positions of the original slide pipe and the inner slide plate; the hoist block is used for adjusting the angle between the chute and the inner chute;
6) adjusting the hoist to enable the chute and the inner chute plate to reach a horizontal angle and a horizontal position before dismantling, moving the chute and the inner chute plate up and down in the direction of the plumb line, and aligning the chute with the blanking pipe while the inner chute plate is deep into the sleeve;
7) welding and reinforcing the joint of the chute and the blanking pipe, and installing a connecting sleeve and an inner chute plate; the connection between the hoist and the chute is dismantled, and the high-span traveling crane is moved away; the reinforcing slide pipe is connected with the blanking pipe, and the reinforcing sleeve is connected with the inner slide plate;
8) and (5) recovering the 23 m platform steel plate above the chute, and taking a trial run.
2. The method for replacing a 120-ton converter chute according to claim 1, characterized in that the new chute in step 5) is treated as follows: measuring the sizes of the old chute and the inner chute, measuring the size from the position of the notch of the feeding pipe to the chute, cutting the new chute and the inner chute according to the measured size, and engaging the notch with the position of the feeding pipe on the line.
3. The method for replacing a 120 ton converter chute according to claim 2 wherein the handling of the new chute is synchronized with step 4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085833.1A CN110669898B (en) | 2019-11-08 | 2019-11-08 | Method for replacing 120-ton converter chute |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085833.1A CN110669898B (en) | 2019-11-08 | 2019-11-08 | Method for replacing 120-ton converter chute |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110669898A CN110669898A (en) | 2020-01-10 |
| CN110669898B true CN110669898B (en) | 2021-03-16 |
Family
ID=69086554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911085833.1A Active CN110669898B (en) | 2019-11-08 | 2019-11-08 | Method for replacing 120-ton converter chute |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110669898B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11199019A (en) * | 1998-01-07 | 1999-07-27 | Kawasaki Steel Corp | Turning chute for putting in auxiliary material |
| CN202304439U (en) * | 2011-08-26 | 2012-07-04 | 宝钢集团新疆八一钢铁有限公司 | Improved discharging chute of converter |
| CN202928367U (en) * | 2012-11-15 | 2013-05-08 | 中冶华天工程技术有限公司 | Centering keeping device for rotary chute |
| CN203373378U (en) * | 2013-06-14 | 2014-01-01 | 鞍钢集团工程技术有限公司 | Bulk material blanking water-cooled sliding chute device of converter |
| CN104988276B (en) * | 2015-06-26 | 2017-11-28 | 江苏永钢集团有限公司 | Converter swivel chute feeding device |
| CN106440825A (en) * | 2016-11-29 | 2017-02-22 | 湖南水口山有色金属集团有限公司 | Movable slagging chute for smelting furnace |
| CN107267708B (en) * | 2017-07-07 | 2019-04-05 | 莱芜钢铁集团有限公司 | The replacing options of converter alloy turntable feeder pipe |
| CN207267886U (en) * | 2017-09-27 | 2018-04-24 | 甘肃酒钢集团西部重工股份有限公司 | A kind of charging chute of steel-smelting revolving furnace smoke canal |
| CN108396088A (en) * | 2018-04-25 | 2018-08-14 | 莱芜钢铁集团有限公司 | Material distribution chute on furnace top of blast furnace more changing device and replacing options |
-
2019
- 2019-11-08 CN CN201911085833.1A patent/CN110669898B/en active Active
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| Publication number | Publication date |
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| CN110669898A (en) | 2020-01-10 |
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Inventor after: Chen Chuansheng Inventor after: Gao Wenxin Inventor after: Ma Kai Inventor after: Xing Min Inventor after: Dong Shiming Inventor after: Bi Yi Inventor after: Liu Hui Inventor after: Zhou Xiang Inventor after: Zhao Changsheng Inventor after: Yu Hongzhi Inventor after: Wang Fengbo Inventor after: Sun Bohan Inventor before: Chen Chuansheng Inventor before: Gao Wenxin Inventor before: Ma Kai Inventor before: Xing Min Inventor before: Dong Shiming Inventor before: Bi Yi Inventor before: Liu Hui Inventor before: Zhou Xiang Inventor before: Zhao Changsheng Inventor before: Yu Hongzhi Inventor before: Wang Fengbo Inventor before: Sun Bohan |