CN111961800A - Method for replacing fixed steelmaking converter shell - Google Patents
Method for replacing fixed steelmaking converter shell Download PDFInfo
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- CN111961800A CN111961800A CN202010616545.0A CN202010616545A CN111961800A CN 111961800 A CN111961800 A CN 111961800A CN 202010616545 A CN202010616545 A CN 202010616545A CN 111961800 A CN111961800 A CN 111961800A
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- furnace shell
- hoisting
- furnace
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- 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
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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a method for replacing a fixed steelmaking converter shell, belongs to the technical field of metallurgical machinery overhaul, and can effectively solve the problems that the existing fixed steelmaking converter shell is replaced due to burning loss in the later stage, the hoisting difficulty is increased due to more equipment on the upper part of the converter shell and larger weight, and hoisting equipment cannot meet hoisting conditions, and the method comprises the following steps: set up supplementary lifting device and hoisting equipment earlier, carry out the position location of furnace body and backing ring again, demolish the furnace body part afterwards to utilize the hoisting point that sets up on the stove outer covering, carry out the hoist and mount of stove outer covering under supplementary lifting device and hoisting equipment's common cooperation and change, the stove outer covering that fixed steelmaking converter can be accomplished to the furnace body part of removing at last repacking is changed, and its beneficial effect lies in: the process is adopted to replace the furnace shell, a special hoisting beam is not required to be manufactured, the manufacturing cost is saved, the process is simple, the operability is strong, the replacement period of the fixed converter shell can be obviously shortened, and the replacement cost investment is reduced.
Description
Technical Field
The invention belongs to the technical field of metallurgical machinery overhaul, and particularly relates to a method for replacing a fixed steelmaking converter shell.
Background
The steelmaking converter stove outer covering is the main equipment of converter system, mainly divide into removable stove outer covering and fixed stove outer covering, has just considered the change of stove outer covering from the design initial stage to removable stove outer covering and has overhauld the link, consequently in case the stove outer covering burns and decreases and need to change, just can realize the quick replacement of stove outer covering through staff and technical manual to the time spent is shorter, just can accomplish the change of stove outer covering within 10 hours under the normal conditions. However, for a fixed converter shell, the design does not consider the replacement requirement, so once the converter shell is accidentally burnt, the replacement of the converter shell is difficult to realize only by workers, the replacement difficulty is high, and the efficiency is low.
The fixed furnace shell replacing process at present often encounters the following problems: firstly, more equipment is arranged above the furnace shell, and more related equipment and facilities need to be removed when the furnace shell is replaced, so that the workload of replacing the furnace shell is increased; secondly, large-tonnage hoisting equipment meeting hoisting conditions is lacked in the span where the converter shell is positioned, so that the hoisting difficulty is increased; and the furnace shell is long in replacement period, so that the process of the period can be delayed, and the enterprise cost is increased. Therefore, the replacement method capable of quickly, safely and efficiently replacing the fixed steelmaking converter shell is of great significance in reducing the difficulty in replacing the converter shell and reducing the maintenance period.
Disclosure of Invention
The invention aims to provide a method for replacing a fixed steelmaking converter shell, which can effectively solve the problems that the existing fixed steelmaking converter shell is replaced due to burning loss in the later stage, the hoisting difficulty is increased due to more equipment on the upper part of the shell and larger weight, and hoisting equipment cannot meet hoisting conditions, and realizes the purpose of replacing the shell safely, quickly and efficiently.
The technical scheme adopted by the invention is as follows:
a method for replacing a fixed steelmaking converter shell comprises the following steps:
step S1: installing hoisting equipment: auxiliary hoisting equipment is arranged on the structural main beam 6 above the furnace shell 3, and hoisting equipment is arranged in front of the furnace shell 3;
step S2: positioning a furnace body: marking the position of the center of the steel tapping hole of the furnace shell 3 on the backing ring 4 by using a line drop paint;
step S3: dismantling furnace body parts: erecting an overhaul platform, dismantling a lower supporting seat 8, a baffle lining plate, an upper supporting seat, a stop block, a ball hanging bolt 7 and an ear plate on the furnace body, and hanging out the cut objects piece by piece;
step S4: furnace shell hoisting points are arranged: arranging a main hoisting point 9 at the upper part of the furnace shell 3, arranging an auxiliary hoisting point 10 at the lower part of the furnace shell 3, hanging the main hoisting point 9 on hoisting equipment through a hoisting rope, and hanging the auxiliary hoisting point 10 on auxiliary hoisting equipment through the hoisting rope;
step S5: hoisting and replacing a furnace shell: hoisting and replacing the furnace shell 3 by utilizing hoisting equipment and auxiliary hoisting equipment;
step S6: installation of furnace body parts: the lower supporting seat 8, the baffle lining plate, the upper supporting seat, the stop block, the ball-hanging bolt 7 and the lug plate are fixedly arranged on the furnace body;
step S7: furnace body detection and test run: and recovering a furnace body water system, and carrying out furnace body detection and test run.
And in the step S1, the auxiliary hoisting equipment comprises a winch 1 and a pulley block 2, the pulley block 2 is fixedly arranged on a structural main beam 6 above the furnace shell 3, and the hoisting equipment adopts a metallurgical crown block 5.
The step S3 includes the steps of:
step S301: downwards arranging a furnace mouth, shaking the supporting ring 4 to be horizontal, connecting a tilting system to cut off power, setting up an overhaul platform, cutting the lower supporting seat 8 and the stop block lining plate, and hanging cut objects out one by one;
step S302: and (3) connecting a tilting system to power on, turning the furnace mouth upwards, shaking the support ring 4 to be horizontal, then cutting off power, building an overhaul platform, firstly cutting off the upper support seat and the stop block, then cutting the ball-hanging bolt 7 and the lug plate, and hanging out the cut objects piece by piece.
In the step S4, the main hanging points 9 are disposed on the front and rear sides of the flange at the upper part of the tap hole of the furnace shell 3, and the auxiliary hanging points 10 are disposed on the ball hanging bolts 7 at the right side of the furnace body and the lower part of the furnace shell 3.
The step S5 includes the steps of:
step S501: the backing ring 4 is swung to 70 degrees to the left side, the metallurgical crown block 5 is firstly utilized to lift the furnace shell 3, the furnace shell 3 moves towards the smelting span under the action of the metallurgical crown block 5, when the lower part of the furnace shell 3 is contacted with the backing ring 4, the furnace shell 3 stops moving, at the moment, the furnace shell 3 is hoisted by the hoisting machine 1 and the pulley block 2, the furnace shell 3 can continuously move towards the smelting span, when the furnace shell 3 moves to the set position, the furnace shell 3 is rotated by the tilting system, and the furnace shell 3 is slowly hoisted out by the matching of the metallurgical crown block 5 and the hoisting machine 1;
step S502: cleaning residual iron and residual welding meat on the surfaces of two sides of the backing ring 4, polishing and flattening the hanging installation position by using a grinding wheel, and carrying out the hoisting installation of the new furnace shell 3;
step S503: a metallurgical crown block 5 is used for hoisting a new furnace shell 3 to a smelting cross platform, a steel wire rope of a winch 1 is threaded from the rear of the furnace, the steel wire rope passes through a backing ring 4 to the bottom of the furnace shell 3, and the backing ring 4, the metallurgical crown block 5 and the winch 1 are matched together to place the new furnace shell 3 into the backing ring 4, so that the furnace shell 3 is replaced.
The step S6 includes the steps of:
step S601: after the furnace body is installed, the front side and the rear side of a gap between the backing ring 4 and the furnace body are 100 +/-10 mm, the left side and the right side are 150 +/-10 mm, a stop block is welded on the backing ring 4 for positioning, and the whole furnace shell 3 is aligned;
step S602: and welding the furnace body upper supporting seat, the ball-hanging bolt 7, the lug plate and the stop block, reinstalling the lower supporting seat 8, welding the lower supporting seat 8 and the stop block lining plate, and finishing the replacement and installation of the furnace shell 3.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1) the invention can effectively solve the problems that the furnace shell of the existing fixed steel-making converter is replaced due to burning loss in the later period, the hoisting difficulty is increased due to more equipment on the upper part of the furnace shell and larger weight, and the hoisting equipment cannot meet the hoisting condition, thereby realizing the purpose of replacing the furnace shell safely, quickly and efficiently;
2) the invention does not need to manufacture a special hoisting beam, saves the manufacturing cost, has simple process and strong operability, and can obviously shorten the replacement period of the fixed converter shell.
Drawings
Fig. 1 is a schematic diagram of hoisting according to an embodiment of the present invention.
Figure number and name: the device comprises a winch 1, a pulley block 2, a furnace shell 3, a backing ring 4, a metallurgy crown block 5, a structural main beam 6, a ball hanging bolt 7, a lower support seat 8, a main hoisting point 9 and an auxiliary hoisting point 10.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the method for replacing a fixed steelmaking converter shell according to the present invention specifically includes the following steps:
1) setting of hoisting facilities before construction: a hoisting facility for hoisting a furnace shell is arranged, a metallurgical crown block 5, a double-drum winch 1 and a pulley block 2 are used, and the specific arrangement form is shown in figure 1;
2) positioning the furnace body on the trunnion ring: cleaning residues between rib plates on the furnace body, and marking the position of the center of a steel tapping hole of the furnace shell 3 on the backing ring 4 by using line weight paint;
3) dismantling the lower support seat and the check block lining plate: downwards arranging a furnace mouth, shaking the supporting ring 4 to be horizontal, connecting a tilting system to cut off power, setting up an overhaul platform, cutting the lower supporting seat 8 and the stop block lining plate, and hanging cut objects out one by one;
4) dismantling the upper supporting seat, the stop block and the three billiard ball hanging bolts: connecting a tilting system to supply power, enabling a furnace mouth to be upward, shaking the support ring 4 to be horizontal, then cutting off power, building an overhaul platform, firstly cutting off an upper support seat and a stop block, then cutting the ball-hung bolt 7 and the lug plate, and hanging out cut objects piece by piece;
5) hanging a hoisting rope: the main hoisting points 9 are arranged on the front side and the rear side of a flange at the upper part of a steel tapping hole of the furnace shell 3, the auxiliary hoisting points 10 are arranged on the ball hanging bolts 7 at the right side of the furnace body and the lower part of the furnace shell 3, and hoisting ropes are hung, so that the selection of the positions of the main hoisting points 9 and the auxiliary hoisting points 10 of the furnace shell is very critical, and the state of the furnace shell 3 after being hoisted, the rotation angle of the backing ring and the mechanical distribution of the main hoisting points and the auxiliary hoisting points are determined;
6) hoisting and inserting the furnace shell: the trunnion ring 4 is swung to 70 degrees to the left side, the metallurgical crown block 5 is firstly utilized to lift the furnace shell 3, the furnace shell 3 moves towards the smelting span under the action of the metallurgical crown block 5, when the lower part of the furnace shell 3 is contacted with the trunnion ring 4, the furnace shell 3 stops moving, at the moment, the furnace shell 3 is hoisted by the hoisting machine 1 and the pulley block 2, the furnace shell 3 can continue to move towards the smelting span, when the furnace shell 3 moves to a set position, the furnace shell 3 is rotated by the tilting system, the furnace shell 3 is slowly hoisted out by utilizing the matching of the metallurgical crown block 5 and the hoisting machine 1, the hoisting point schematic diagram is shown in figure 1, and it is worth noting that in the embodiment, the positioning is the position when the tangent of the outer side wall of the furnace shell 3 is parallel to the tangent of the inner side surface of the trunnion ring 4, and the relative position between the furnace shell 3 and the trunnion ring;
7) cleaning residual steel on the backing ring: cleaning residual iron and residual welding meat on the surfaces of two sides of the backing ring 4, and polishing and flattening the hanging installation position by using a grinding wheel;
8) hoisting a furnace shell to be on line: hoisting a new furnace shell 3 to a smelting cross platform by using a metallurgy crown block 5, threading a steel wire rope of a winch 1 from the rear of the furnace, passing through a backing ring 4 to the bottom of the furnace shell 3, and putting the new furnace shell 3 into the backing ring 4 by using the common cooperation of the backing ring 4, the metallurgy crown block 5 and the winch 1;
9) adjusting the position of the furnace shell: after the furnace body is installed, the front side and the rear side of a gap between the backing ring 4 and the furnace body are 100 +/-10 mm, the left side and the right side are 150 +/-10 mm, a stop block is welded on the backing ring 4 for positioning, and the whole furnace shell 3 is aligned;
10) installing an upper supporting seat, a ball-hanging bolt ear plate and a lower supporting seat of the furnace shell: welding an upper supporting seat, a ball-hanging bolt 7, an ear plate and a stop block of the furnace body, reinstalling a lower supporting seat 8, and welding the lower supporting seat 8 and a stop block lining plate;
11) and (3) recovering a furnace body water system: a furnace mouth water tank is arranged in a pipe, and pressure is applied to test leakage;
12) detection and test run: and detecting the furnace body, and performing test run after the detection is finished.
Tests show that the fixed steelmaking converter shell 3 is replaced by using the steps, a special hoisting beam is not required to be manufactured, the operability is strong, the furnace shell replacement period can be greatly shortened, and the replacement cost investment is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A method for replacing a fixed steelmaking converter shell is characterized by comprising the following steps: the method comprises the following steps:
step S1: installing hoisting equipment: auxiliary hoisting equipment is arranged on a structural main beam (6) above the furnace shell (3), and hoisting equipment is arranged in front of the furnace shell (3);
step S2: positioning a furnace body: marking the position of the center of the steel tapping hole of the furnace shell (3) on the backing ring (4) by using line drop paint;
step S3: dismantling furnace body parts: setting up an overhaul platform, dismantling a lower supporting seat (8), a baffle lining plate, an upper supporting seat, a stop block, a ball-hanging bolt (7) and an ear plate on the furnace body, and hanging out the cut objects piece by piece;
step S4: furnace shell hoisting points are arranged: arranging a main hoisting point (9) at the upper part of the furnace shell (3), arranging an auxiliary hoisting point (10) at the lower part of the furnace shell (3), hanging the main hoisting point (9) on hoisting equipment through a hoisting rope, and hanging the auxiliary hoisting point (10) on the auxiliary hoisting equipment through the hoisting rope;
step S5: hoisting and replacing a furnace shell: hoisting and replacing the furnace shell (3) by utilizing hoisting equipment and auxiliary hoisting equipment;
step S6: installation of furnace body parts: the lower supporting seat (8), the baffle lining plate, the upper supporting seat, the stop block, the ball-hanging bolt (7) and the ear plate are fixedly arranged on the furnace body;
step S7: furnace body detection and test run: and recovering a furnace body water system, and carrying out furnace body detection and test run.
2. The method of changing a furnace shell of a fixed steelmaking converter according to claim 1, wherein: and in the step S1, the auxiliary hoisting equipment comprises a winch (1) and a pulley block (2), the pulley block (2) is fixedly arranged on a structural main beam (6) above the furnace shell (3), and the hoisting equipment adopts a metallurgical crown block (5).
3. The method of changing a furnace shell of a fixed steelmaking converter according to claim 1, wherein: the step S3 includes the steps of:
step S301: the furnace mouth is downward, the supporting ring (4) is shaken to be horizontal, the contact tilting system is powered off, an overhaul platform is built, the lower supporting seat (8) and the stop block lining plate are cut, and cut objects are lifted out one by one;
step S302: and (3) connecting a tilting system to power on, turning the furnace mouth upwards, shaking the support ring (4) to be horizontal, then cutting off power, setting up an overhaul platform, firstly cutting off the upper support seat and the stop block, then cutting the ball-hung bolt (7) and the lug plate, and hanging out the cut objects piece by piece.
4. The method of changing a furnace shell of a fixed steelmaking converter according to claim 1, wherein: in the step S4, the main hoisting points (9) are arranged on the front side and the rear side of the flange at the upper part of the steel tapping hole of the furnace shell (3), and the auxiliary hoisting points (10) are arranged on the ball hanging bolts (7) at the right side of the furnace body and the lower part of the furnace shell (3).
5. The method of changing a furnace shell of a fixed steelmaking converter according to claim 1, wherein: the step S5 includes the steps of:
step S501: the trunnion ring (4) is swung to 70 degrees to the left side, a metallurgical crown block (5) is firstly utilized to lift the furnace shell (3), the furnace shell (3) moves towards the smelting span under the action of the metallurgical crown block (5), when the lower part of the furnace shell (3) is contacted with the trunnion ring (4), the furnace shell (3) stops moving, at the moment, the furnace shell (3) is hoisted by a hoist (1) and a pulley block (2), the furnace shell (3) can continuously move towards the smelting span, when the furnace shell (3) moves to a set position, the furnace shell (3) is rotated by a tilting system, and the furnace shell (3) is slowly hoisted out by the matching of the metallurgical crown block (5) and the hoist (1);
step S502: cleaning residual iron and residual welding meat on the surfaces of two sides of the backing ring (4), polishing and flattening the hanging installation position by using a grinding wheel, and carrying out hoisting installation on the new furnace shell (3);
step S503: a new furnace shell (3) is lifted to a smelting cross platform by using a metallurgy crown block (5), a steel wire rope of a winch (1) is threaded from the back of the furnace, and the new furnace shell (3) is placed in a backing ring (4) by using the common cooperation of the backing ring (4), the metallurgy crown block (5) and the winch (1) through the backing ring (4) to the bottom of the furnace shell (3), so that the replacement of the furnace shell (3) is completed.
6. The method of changing a furnace shell of a fixed steelmaking converter according to claim 1, wherein: the step S6 includes the steps of:
step S601: after the furnace body is installed, the front side and the rear side of a gap between the backing ring (4) and the furnace body are 100 +/-10 mm, the left side and the right side are 150 +/-10 mm, a stop block is welded on the backing ring (4) for positioning, and the furnace shell (3) is integrally aligned;
step S602: and welding the upper support seat, the ball-hanging bolt (7), the lug plate and the check block of the furnace body, reinstalling the lower support seat (8), welding the lower support seat (8) and the check block lining plate, and finishing the replacement and installation of the furnace shell (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616545.0A CN111961800A (en) | 2020-06-30 | 2020-06-30 | Method for replacing fixed steelmaking converter shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010616545.0A CN111961800A (en) | 2020-06-30 | 2020-06-30 | Method for replacing fixed steelmaking converter shell |
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| CN111961800A true CN111961800A (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010616545.0A Pending CN111961800A (en) | 2020-06-30 | 2020-06-30 | Method for replacing fixed steelmaking converter shell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113879978A (en) * | 2021-10-08 | 2022-01-04 | 中国十九冶集团有限公司 | Plug-in mounting method for converter shell |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201027797Y (en) * | 2007-04-23 | 2008-02-27 | 中冶赛迪工程技术股份有限公司 | Spherical hinge joint mechanism |
| CN101812564A (en) * | 2010-04-27 | 2010-08-25 | 武汉一冶机电工程有限责任公司 | Method for installing converter in plug-in mode |
| CN102242235A (en) * | 2011-07-01 | 2011-11-16 | 中国一冶集团有限公司 | Method for installing converter shell in reverse hydraulically lifting manner |
| JP2012193433A (en) * | 2011-03-17 | 2012-10-11 | Jfe Steel Corp | Repairing method for furnace of converter |
| CN102776318A (en) * | 2012-08-16 | 2012-11-14 | 中冶赛迪工程技术股份有限公司 | Arrangement structure of converter four-point connecting rod suspending device |
| CN202786304U (en) * | 2012-06-29 | 2013-03-13 | 河北钢铁股份有限公司承德分公司 | Guide positioning device for rapidly mounting converter shell |
| CN104762438A (en) * | 2015-03-23 | 2015-07-08 | 莱芜钢铁集团有限公司 | A converter device replacing and installing method |
-
2020
- 2020-06-30 CN CN202010616545.0A patent/CN111961800A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201027797Y (en) * | 2007-04-23 | 2008-02-27 | 中冶赛迪工程技术股份有限公司 | Spherical hinge joint mechanism |
| CN101812564A (en) * | 2010-04-27 | 2010-08-25 | 武汉一冶机电工程有限责任公司 | Method for installing converter in plug-in mode |
| JP2012193433A (en) * | 2011-03-17 | 2012-10-11 | Jfe Steel Corp | Repairing method for furnace of converter |
| CN102242235A (en) * | 2011-07-01 | 2011-11-16 | 中国一冶集团有限公司 | Method for installing converter shell in reverse hydraulically lifting manner |
| CN202786304U (en) * | 2012-06-29 | 2013-03-13 | 河北钢铁股份有限公司承德分公司 | Guide positioning device for rapidly mounting converter shell |
| CN102776318A (en) * | 2012-08-16 | 2012-11-14 | 中冶赛迪工程技术股份有限公司 | Arrangement structure of converter four-point connecting rod suspending device |
| CN104762438A (en) * | 2015-03-23 | 2015-07-08 | 莱芜钢铁集团有限公司 | A converter device replacing and installing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113879978A (en) * | 2021-10-08 | 2022-01-04 | 中国十九冶集团有限公司 | Plug-in mounting method for converter shell |
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Application publication date: 20201120 |