CN106799559A - A kind of whole band replacing options of hot-air stove shell - Google Patents
A kind of whole band replacing options of hot-air stove shell Download PDFInfo
- Publication number
- CN106799559A CN106799559A CN201611205703.3A CN201611205703A CN106799559A CN 106799559 A CN106799559 A CN 106799559A CN 201611205703 A CN201611205703 A CN 201611205703A CN 106799559 A CN106799559 A CN 106799559A
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- replacing
- furnace
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- shell
- shells
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of whole band replacing options of hot-air stove shell, belong to hot-blast stove technical field.The whole band replacing options of hot-air stove shell are comprised the following steps：Some original furnace shells are removed by the N annulus on hot-blast stove；Some replacing furnace shells are assembled on N annulus, some replacing furnace shells are welded with N -1 annulus and N+1 annulus, are welded between some replacing furnace shells；Some replacing furnace shells after the completion of to welding carry out carrying out flaw detection；Some replacing furnace shells after to carrying out flaw detection carry out heat-treatment of annealing.The whole band replacing options of hot-air stove shell of the present invention are keeping refractory material integrality in large-scale blast furnace hot blast stove furnace shell, ensure to realize furnace shell replacing while furnace shell load-bearing, solve the problems, such as that hot-blast stove high-temperature area furnace shell serious cracking and weld seam ftracture repeatedly, it is ensured that hot-blast stove safe and stable operation.
Description
Technical field
The present invention relates to hot-blast stove technical field, more particularly to a kind of whole band replacing options of hot-air stove shell.
Background technology
Hot blast furnace shell is the important component of blast furnace system engineering.The stable safe operation of hot-blast stove is surely suitable blast furnace
Basis.But as smelting strength of blast furnace and the oxygen-enriched level of wind-warm syndrome are improved, hot-air stove shell cracking situation frequently occurs, to safety
Production brings hidden danger, has a strong impact on the stable smooth operation of blast furnace.Hot-air stove shell cracking is mainly caused by stress corrosion, and chemistry is rotten
Erosion and blast pressure (0.4MPa) produced by tension force and welding, installation process in produce residual stress be mainly influence because
Element.The lower generation NOx of hot-blast stove HTHP effect is the reason for causing chemical attack.Domestic large-scale blast furnace hot blast stove was being produced
Generally existing hidden danger in journey, is mainly reflected in hot-blast stove high-temperature area furnace shell serious cracking and weld seam ftractures repeatedly, and its feature is dashed forward
Go out to show as that weld cracking length is big, weld seam carbonization is serious, frequent cracking etc. after repair welding, still cannot after many kinds of measures is taken
Solve hidden danger.
The content of the invention
The present invention provides a kind of hot-air stove shell whole band replacing options, solves or part solves hot blast in the prior art
Stove high-temperature area furnace shell serious cracking and weld seam are ftractureed repeatedly, and the technology that hidden danger cannot be still solved after many kinds of measures is taken is asked
Topic.
In order to solve the above technical problems, including following step the invention provides a kind of whole band replacing options of hot-air stove shell
Suddenly：Some original furnace shells are removed by the N annulus on hot-blast stove；Some replacing furnace shells are assembled on the N annulus, institute
State some replacing furnace shells to be welded with N-1 annulus and the N+1 annulus, welded between some replacing furnace shells
Connect；Described some replacing furnace shells after the completion of to welding carry out carrying out flaw detection；Described some replacing furnace shells after to carrying out flaw detection
Carry out heat-treatment of annealing.
Further, it is described to include original furnace shell by being removed on hot-blast stove：At some original furnace shell girth joints
Cutting, cutting position need to extend outward；To being cut at some original furnace shell cross joints, can be perpendicular in some original furnace shells
Cut at weld seam mother metal.
Further, described to being cut at some original furnace shell girth joints, cutting position need to outward extend 10-30cm.
Further, it is described to being cut at some original furnace shell cross joints, can be cut in the commissure of cross joint
Cut.
Further, it is described that some replacing furnace shells are assembled on the N annulus, some replacing furnace shell and the N-
1 annulus and the N+1 annulus are welded, and carrying out welding between some replacing furnace shells includes：By some replacings
Furnace shell is numbered in order, by numbering after the completion of it is described some replacing furnace shells be assembled on the N annulus, it is described some
Change furnace shell to be welded with the N-1 annulus and the N+1 annulus, welded between some replacing furnace shells.
Further, it is described that some replacing furnace shells are assembled on the N annulus, some replacing furnace shell and the N-
1 annulus and the N+1 annulus are welded, and carrying out welding between some replacing furnace shells includes：By some replacings
Furnace shell is pre-installed on the ground, and some replacing furnace shell parts therein carry out prewelding, by the replacing furnace shell segmentation
The N annulus is lifted on, some replacing furnace shells are welded with the N-1 annulus and the N+1 annulus, incite somebody to action
Some replacing furnace shell parts therein are welded with other parts.
Further, invention provides the whole band replacing options of hot-air stove shell and also includes：By pre- postwelding it is described some more
Lifting furnace shells are changed at the N annulus of the hot-blast stove, some replacing furnace shells are supported by support frame.
Further, groove processed is opened on some replacing furnace shells.
Further, the described some replacing furnace shells after the completion of described pair of welding carry out carrying out flaw detection includes：If treating described
After the completion of the dry replacing whole welding of furnace shell, weldquality is detected using ultrasonic examination.
Further, it is described to carrying out flaw detection after described some replacing furnace shells carry out heat-treatment of annealing and include：To described
Some replacing furnace shells use Electric heating integrally annealed.
The hot-air stove shell of present invention offer is whole to be torn open some original furnace shells by the N annulus on hot-blast stove with replacing options
Remove, by it is some replacing furnace shells be assembled on N annulus, by it is some replacing furnace shells be assembled on N annulus, it is some replacing furnace shells with
N-1 annulus and N+1 annulus are welded, it is described it is some replacing furnace shells between welded, to welding after the completion of it is some
Changing furnace shell carries out carrying out flaw detection, to carrying out flaw detection after some replacing furnace shells carry out heat-treatment of annealing, by carrying out flaw detection and
The means such as annealing, can eliminate cracking and burn hidden danger, it is ensured that repairing quality and hot-blast stove safe and stable operation, keep big
Refractory material integrality in type blast funnace hot blast stove furnace shell, it is ensured that furnace shell replacing is realized while furnace shell load-bearing, hot blast is solved
The problem that stove high-temperature area furnace shell serious cracking and weld seam ftracture repeatedly.
Brief description of the drawings
Fig. 1 is the whole schematic flow sheet with replacing options of hot-air stove shell provided in an embodiment of the present invention；
Fig. 2 is the groove schematic diagram of the whole replacing furnace shell with replacing options of hot-air stove shell in Fig. 1；
Fig. 3 is the structural representation of the band of hot-blast stove the 15th in Fig. 1；
Fig. 4 is weld seam arrangement schematic diagram of the hot-blast stove degree 15 with furnace shell is changed in Fig. 3.
Specific embodiment
Referring to Fig. 1-2, a kind of whole band replacing options of hot-air stove shell provided in an embodiment of the present invention are comprised the following steps：
Step 1, some original furnace shells are removed by the N annulus on hot-blast stove.
Step 2, by it is some replacing furnace shells be assembled on the N annulus, it is described it is some replacing furnace shells and N-1 annulus and
The N+1 annulus is welded, and is welded between some replacing furnace shells.
Step 3, to welding after the completion of it is described some replacing furnace shells carry out carrying out flaw detection.
Step 4, to carrying out flaw detection after it is described some replacing furnace shells carry out heat-treatment of annealing.
Technical solution of the present invention is removed some original furnace shells by the N annulus on hot-blast stove, and some replacing furnace shells are spelled
On N annulus, some replacing furnace shells are assembled on N annulus, it is some to change furnace shell and N-1 annulus and N+1 rings
Band is welded, and is welded between some replacing furnace shells, carrying out flaw detection is carried out to the replacing furnace shell after the completion of lifting, to flaw detection
Replacing furnace shell after detection carries out heat-treatment of annealing, by the means such as carrying out flaw detection and annealing, can eliminate cracking and burn
Hidden danger, it is ensured that repairing quality and hot-blast stove safe and stable operation, keeping, refractory material in large-scale blast furnace hot blast stove furnace shell is complete
Property, it is ensured that furnace shell replacing is realized while furnace shell load-bearing, hot-blast stove high-temperature area furnace shell serious cracking is solved and weld seam is anti-
The problem of multiple cracking.
Step 1 is discussed in detail.
It is described to include original furnace shell by being removed on hot-blast stove：To being cut at original furnace shell girth joint, cutting position
Need to extend outward, described to being cut at original furnace shell girth joint, cutting position need to outward extend 10-15cm, it is therefore an objective to retain ring
Weld seam, convenient observation girth joint situation.
To being cut at original furnace shell cross joint, can be cut at original furnace shell cross joint mother metal, can retained
Longitudinal seam, is easy to observe the situation of cross joint, can parse the reason for original furnace shell ftractures and mechanism.When there is special process requirement
When, it is described to being cut at original furnace shell cross joint, can be cut in the commissure of cross joint.
Step 2 is discussed in detail.
It is described that some replacing furnace shells are assembled on the N annulus, some replacing furnace shell and N-1 annulus and the institutes
State N+1 annulus to be welded, carrying out welding between some replacing furnace shells includes：By some replacing furnace shells in order
Be numbered, by numbering after the completion of it is described some replacing furnace shells be assembled on the N annulus, it is described it is some replacing furnace shells with
N-1 annulus above the N annulus and the N+1 annulus below the N annulus are welded, some replacing stoves
Welded between shell.
It is described that some replacing furnace shells are assembled on the N annulus, some replacing furnace shell and N-1 annulus and the institutes
State N+1 annulus to be welded, carrying out welding between some replacing furnace shells includes：By some replacing furnace shells on ground
On pre-installed, it is described it is some replacing a furnace shell parts therein carry out prewelding, by it is described replacing furnace shell segmental hoisting described
N annulus, it is described some to change the N+1 annulus above furnace shells and the N annulus and the N-1 below the N annulus
Annulus is welded, and institute is welded some replacing furnace shell parts therein with other parts, is easy to overhead welding
Operation.
Meanwhile, groove processed is opened on the replacing furnace shell, the aperture of the groove is 15 °, and core wire is welded at the groove
Connect, be easy to construction, it is ensured that welding quality.The replacing furnace shell can complete part welding at ground, and segmental hoisting is in the warm
Wind furnace corresponding ring belt, reduces overhead welding construction intensity and difficulty.
The whole band replacing options of hot-air stove shell of the present invention also include：The replacing lifting furnace shells after by welding are in the warm
At the annulus of wind furnace, the replacing furnace shell is supported by support frame.If hot-air stove shell carries out many bands changing, required during assembling from
The hot-blast stove bottom is up carried out by band.When the replacing furnace shell to the hot-blast stove is lifted, described in preventing more
Shell deformation is changed, furnace shell Anti-deformation support frame should be installed.
Step 3 is discussed in detail.
The replacing furnace shell after described pair of welding and installation carries out carrying out flaw detection to be included：Treat that the replacing furnace shell is whole
After the completion of welding, weldquality is detected using ultrasonic examination, to gas pore in weld metal or the defect such as lack of penetration, give weight
Weldering.
Step 4 is discussed in detail.
It is described to carrying out flaw detection after the replacing furnace shell carry out heat-treatment of annealing and include：To the replacing furnace shell using electricity
Mode of heating integrally annealed, eliminates the residual stress for changing the generation of furnace shell welded and installed process.
The embodiment of the present invention is introduced in order to clearer, is introduced from the application method of the embodiment of the present invention below.
Referring to Fig. 3-4, changed with D below in conjunction with certain enterprise's top combustion stove 15 and actually illustrated.
The band of enterprise's hot-blast stove the 15th D is made up of 20 pieces of furnace shells, wherein the two of M thickness piece, 18 pieces of (1#- of N thickness
18#), this band because original casing temperature it is too high, cause original furnace shell plate local and crumple because crossing, internal weld seams heat affected area mother metal
Stress has ftractureed.(two pieces of M thickness are changed without) need to be changed to whole band, now to changing the arrangement of furnace shell position while welding.
With reference to on-site actual situations, some original furnace shell to hot-blast stove first carries out cutting disassembling.According to new typesetting
Some replacing furnace shell position setting-outs, some original furnace shells are cut away using gas welding, are hung out with truck crane, to some original furnace shell rings
Commissure is cut, and cutting position need to extend outward, and to being cut at some original furnace shell girth joints, cutting position need to extend outward
10-15cm, it is therefore an objective to retain girth joint, convenient observation girth joint situation, to being cut at some original furnace shell cross joints, if can be in
Do and cut at original furnace shell cross joint mother metal, longitudinal seam can be retained, be easy to observe the situation of cross joint.Wanted when there is special process
When asking, to being cut at some original furnace shell cross joints, can be cut in the commissure of cross joint.One side is opened up to cutting part
Groove C is 15 °.Then, by it is some replacing furnace shells be numbered in order, by numbering after the completion of some replacing furnace shells be assembled in
It is some to change the second annulus above furnace shells and the first annulus and the 3rd annulus below first annulus enters on first annulus
Row welding, is welded between some replacing furnace shells.Some replacing furnace shells can also on the ground be pre-installed, some replacings
A furnace shell part therein carries out prewelding, will change furnace shell segmental hoisting in the first annulus, some replacing furnace shells and the first annulus
The 3rd annulus below second annulus and the first annulus of top is welded, it is some replacing furnace shells it is therein a part and other
Part is welded, and by the replacing lifting furnace shells after welding at the annulus of hot-blast stove, is supported by support frame and is changed furnace shell, if
Hot-air stove shell carries out many bands and changes, and requires up to be carried out by band from hot-blast stove bottom during assembling, some replacings to hot-blast stove
When furnace shell is lifted, to prevent some replacing shell deformations, furnace shell Anti-deformation support frame should be installed.By on some replacing furnace shells
Open and make groove A for 15 °, be numbered in order so as to assembled in situ.
In order to ensure welding requirements, 10mm gaps, bottom is stayed to add backing plate between the replacing furnace shell of new clothes and former furnace shell plate
B, plate thickness 3mm, width 30mm, ensure that weld seam is penetrated with this.Welding process will ensure welding quality, specific to weld and flaw detection
It is required that identical with the technical requirements of bead crack treatment.
To changing furnace shell carrying out flaw detection.After the completion of new furnace shell 15 is with the whole weldings of D, weld seam matter is detected using ultrasonic examination
Amount, if having stomata or the defect such as lack of penetration during weld seam is found during flaw detection, should give and reweld.Using Electric heating to 15 bands
D carries out integrally annealed, eliminates and changes the residual stress that furnace shell welded and installed process is produced, it is ensured that repairing quality and hot-blast stove safety
Stable operation, is keeping refractory material integrality in large-scale blast furnace hot blast stove furnace shell, it is ensured that realize stove while furnace shell load-bearing
Shell is changed, and solves the problems, such as that hot-blast stove high-temperature area furnace shell serious cracking and weld seam ftracture repeatedly.
If additionally, hot-air stove shell carries out many bands changing, requiring up to be carried out by band from hot-blast stove bottom during assembling.To heat
When wind furnace furnace shell is lifted, to prevent shell deformation, furnace shell Anti-deformation support frame should be installed.Because hot-blast stove is higher, in weldering
During the replacing furnace shell of the side of connecting, made using channel-section steel, angle steel and diamond plate and change inspection platform.Inspection platform can make in advance
Good, lifting is installed, and with replacing case weld firmly, bottom is set with channel-section steel strengthens bracket to the skeleton of inspection platform, is easy to construction.
It should be noted last that, above specific embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although being described in detail to the present invention with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent, without deviating from the spirit and scope of technical solution of the present invention, it all should cover
In the middle of scope of the presently claimed invention.
Claims (10)
1. a kind of hot-air stove shell is whole with replacing options, it is characterised in that comprise the following steps：
Some original furnace shells are removed by the N annulus on hot-blast stove；
Some replacing furnace shells are assembled on the N annulus, some replacing furnace shell and N-1 annulus and the N+1
Annulus is welded, and is welded between some replacing furnace shells；
Described some replacing furnace shells after the completion of to welding carry out carrying out flaw detection；
Described some replacing furnace shells after to carrying out flaw detection carry out heat-treatment of annealing.
2. replacing options according to claim 1, it is characterised in that it is described by original furnace shell by removing bag on hot-blast stove
Include：
To being cut at some original furnace shell girth joints, cutting position need to extend outward；
To being cut at some original furnace shell cross joints, can be cut at some original furnace shell cross joint mother metals.
3. replacing options according to claim 2, it is characterised in that：
It is described to being cut at some original furnace shell girth joints, cutting position need to outward extend 10-30cm.
4. replacing options according to claim 2, it is characterised in that：
It is described at some original furnace shell cross joints cut, can be cut in the commissure of cross joint.
5. replacing options according to claim 1, it is characterised in that described that some replacing furnace shells are assembled in the N
On annulus, some replacing furnace shells are welded with the N-1 annulus and the N+1 annulus, some replacing stoves
Welding is carried out between shell to be included：
Some replacing furnace shells are numbered in order, by numbering after the completion of described some replacing furnace shells be assembled in it is described
On N annulus, some replacing furnace shells are welded with the N-1 annulus and the N+1 annulus, some replacings
Welded between furnace shell.
6. replacing options according to claim 1, it is characterised in that described that some replacing furnace shells are assembled in the N
On annulus, some replacing furnace shells are welded with N-1 annulus and N+1 annulus, are entered between some replacing furnace shells
Row welding includes：
Some replacing furnace shells are pre-installed on the ground, some replacing furnace shell parts therein carry out prewelding,
By the replacing furnace shell segmental hoisting in the N annulus, some replacing furnace shell and the N-1 annulus and the N+
1 annulus is welded, and institute is welded some replacing furnace shell parts therein with other parts.
7. replacing options according to claim 6, it is characterised in that also include：
By described some replacing lifting furnace shells of pre- postwelding at the N annulus of the hot-blast stove, support described by support frame
Some replacing furnace shells.
8. replacing options according to claim 1, it is characterised in that：
Groove processed is opened on some replacing furnace shells.
9. replacing options according to claim 1, it is characterised in that the described some replacing stoves after the completion of described pair of welding
Shell carries out carrying out flaw detection to be included：
Treat after the completion of some replacing whole weldings of furnace shell, weldquality is detected using ultrasonic examination.
10. replacing options according to claim 1, it is characterised in that it is described to carrying out flaw detection after described some replacings
Furnace shell carries out heat-treatment of annealing to be included：
Electric heating integrally annealed is used to some replacing furnace shells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205703.3A CN106799559A (en) | 2016-12-23 | 2016-12-23 | A kind of whole band replacing options of hot-air stove shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205703.3A CN106799559A (en) | 2016-12-23 | 2016-12-23 | A kind of whole band replacing options of hot-air stove shell |
Publications (1)
| Publication Number | Publication Date |
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| CN106799559A true CN106799559A (en) | 2017-06-06 |
Family
ID=58985075
Family Applications (1)
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|---|---|---|---|
| CN201611205703.3A Pending CN106799559A (en) | 2016-12-23 | 2016-12-23 | A kind of whole band replacing options of hot-air stove shell |
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Cited By (3)
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| CN107641707A (en) * | 2017-10-16 | 2018-01-30 | 首钢集团有限公司 | A kind of blast funnace hot blast stove furnace shell local heat treatmet annealing device and method |
| CN113000981A (en) * | 2021-02-20 | 2021-06-22 | 广东韶钢松山股份有限公司 | Method for cutting spherical top furnace shell of blast furnace hot blast stove |
| CN116814882A (en) * | 2023-08-16 | 2023-09-29 | 北京卡卢金热风炉技术有限公司 | Hot-blast stove shell welding repair structure and hot-blast stove shell welding repair method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107641707A (en) * | 2017-10-16 | 2018-01-30 | 首钢集团有限公司 | A kind of blast funnace hot blast stove furnace shell local heat treatmet annealing device and method |
| CN107641707B (en) * | 2017-10-16 | 2019-10-08 | 首钢集团有限公司 | A kind of blast funnace hot blast stove furnace shell local heat treatmet annealing device and method |
| CN113000981A (en) * | 2021-02-20 | 2021-06-22 | 广东韶钢松山股份有限公司 | Method for cutting spherical top furnace shell of blast furnace hot blast stove |
| CN116814882A (en) * | 2023-08-16 | 2023-09-29 | 北京卡卢金热风炉技术有限公司 | Hot-blast stove shell welding repair structure and hot-blast stove shell welding repair method |
| CN116814882B (en) * | 2023-08-16 | 2024-01-23 | 北京卡卢金热风炉技术有限公司 | Hot-blast stove shell welding repair structure and hot-blast stove shell welding repair method |
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