CN105171261B - A kind of welding method of large-scale steelmaking converter body of heater - Google Patents
A kind of welding method of large-scale steelmaking converter body of heater Download PDFInfo
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- CN105171261B CN105171261B CN201510608032.4A CN201510608032A CN105171261B CN 105171261 B CN105171261 B CN 105171261B CN 201510608032 A CN201510608032 A CN 201510608032A CN 105171261 B CN105171261 B CN 105171261B
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- welding
- furnace shell
- heater
- weld
- converter body
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of welding method of large-scale steelmaking converter body of heater.It is comprised the following steps：1）Preparation of construction before welding body of heater：Escape way first is set up in converter body surrounding 11.5m elevation locations, finally the diameter to furnace shell is detected, the diameter deviation of furnace shell should meet design requirement；2）Tack welding；3）Formal welding：Locator card is first removed before formal welding, furnace body inside is welded afterwards, until weld joint on inner side untill when being welded to the 2/3 of its length；4）Post weld heat treatment；5）Final welding：The back chipping treatment of weld joint on inner side, then the external side of soldering furnace are first carried out, after the completion of outer side weld, the welding of furnace body inside residue weld seam is finally completed.The present invention compared to existing technology, by welding sequence and welding method efficient combination, improves the quality and operating efficiency of welding, reduces mass defect, increases a solder yield.
Description
Technical field
The invention belongs to converter body welding technology field, more particularly to a kind of welding side of large-scale steelmaking converter body of heater
Method.
Background technology
At present, it is existing on steelmaking converter body of heater welding method, relevant information is not directly found, but title is relatively
Patent design it is more；Such as " the baking oven furnace body welding robot double work of China national Patent Office's on October 2nd, 2013 issue
Stand ", Patent No. CN201310292826, it is mainly baking oven furnace body welding robot double work station by constituting
The each edge of workpiece is gripped, so as to preferably be shaped, is easy to welding.For another example China national Patent Office 2013
" attemperator of blast furnace welding under low temperature environment " of the issue of November 6, Patent No. CN201220473027, its is main
Be to provide it is a kind of blast furnace is heated up at low temperature, is incubated, to ensure low temperature ring of the welding region temperature more than 0 DEG C
The attemperator of blast furnace welding under border.But current, there is not the patent to form steel-making patent body of heater welding method also.
With the policy guidance that China's economy is developed rapidly and country's encouragement eliminates the backward production facilities, metallurgy industry is faced with life
Production. art, renewal of the equipment, require newly-built or enlarging steelmaking system equipment accordingly, increase production capacity and quality assurance.Converter installation
It is most to popularize general steel-making main equipment, is directly connected to the yield and quality of steel mill's molten steel.And steelmaking converter body of heater is segmented
Site Welding of marching into the arena will directly affect the follow-up quality of production of converter body, and it is difficult that the special material of body of heater causes welding quality to control
Degree is increased.
The content of the invention
It is an object of the invention to provide a kind of welding method of large-scale steelmaking converter body of heater, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, present invention employs following technical scheme：
A kind of welding method of large-scale steelmaking converter body of heater, comprises the following steps：
1）Preparation of construction before welding body of heater：
Escape way first is set up in converter body surrounding 11.5m elevation locations, to facilitate applying for human users and cable
If converter body includes upper furnace shell and lower furnace shell, finally the diameter to furnace shell is detected, the diameter deviation of furnace shell should meet and set
Meter is required, and the difference of maximum gauge and minimum diameter cannot be greater than the 3/1000 of furnace shell intended diameter, and the limit of furnace shell height is inclined
Difference is ± the 3/1000 of design height, and fire door plane is 1/1000 to the squareness tolerance of furnace shell axis；
2）Tack welding：
First the upper furnace shell of converter body and lower furnace shell are linked together by locator card, then by welder using formal weldering
Material and welding procedure welding are connect, ensures that weld seam does not ftracture in welding process, postwelding inspection is carried out after the completion of last tack welding, gone out
During existing defect, it is necessary to root out tack welding meat and re-start tack welding；
3）Formal welding：
Locator card is first removed before formal welding, furnace body inside is welded afterwards, until weld joint on inner side is being welded to the 2/3 of its length
When untill, in formal welding process, some welders weldings simultaneously at same direction；
4）Post weld heat treatment：
After formal welding is finished, in the case where weld seam without cooling down completely, by heater energization come to weld seam
Locate heat temperature raising up to temperature reaches 200 DEG C and is incubated 2 hours, to remove the hydrogen remained in weld seam；
5）Final welding：
The back chipping treatment of weld joint on inner side, then the external side of soldering furnace are first carried out, after the completion of outer side weld, is finally completed in body of heater
The welding of side residue weld seam.
Preferably, step 2）Middle locator card is that the 16Mn steel plates that specification is 800 × 400 × 30mm are made, locator card
Side opens up to ensure the semi-circular hole that locator card is consistent with upper furnace shell and lower furnace shell joint gap.
Preferably, step 2）Middle locator card is uniformly arranged on outside in furnace shell, and locator card on the outside of furnace shell avoids furnace shell
Both sides gudgeon position.
Preferably, step 2）In when tack welding is carried out, outside carries out tack welding in body of heater, and fusion length is
300mm, adjacent weld spacing is 300mm.
Preferably, step 3）In being preheated with before formal welding after removing locator card, preheating temperature is 125 ± 25
DEG C interval.
Preferably, step 4）Wrap up heat-preservation cotton in heater periphery.
Compared with prior art, beneficial effects of the present invention are as follows：
The present invention compared to existing technology, by welding sequence and welding method efficient combination, improves the quality and work of welding
Make efficiency, reduce mass defect, increase a solder yield.
Brief description of the drawings
Fig. 1 is the welding schematic diagram of upper furnace shell and lower furnace shell.
Fig. 2 is the arrangement schematic diagram of locator card.
Specific embodiment
Preferred embodiment of the invention is described in further detail with reference to embodiment.
As depicted in figs. 1 and 2, a kind of welding method of large-scale steelmaking converter body of heater, comprises the following steps：
1）Preparation of construction before welding body of heater：
Escape way first is set up in the surrounding 11.5m elevation locations of converter body 1, to facilitate applying for human users and cable
If converter body 1 includes upper furnace shell 2 and lower furnace shell 3, finally the diameter to furnace shell detects that the diameter deviation of furnace shell should be accorded with
Design requirement is closed, and the difference of maximum gauge and minimum diameter cannot be greater than the 3/1000 of furnace shell intended diameter, the pole of furnace shell height
Limit deviation is ± the 3/1000 of design height, and fire door plane is 1/1000 to the squareness tolerance of furnace shell axis.
2）Tack welding：
First the upper furnace shell 2 of converter body 1 and lower furnace shell 3 are linked together by locator card 4, locator card 4 is uniformly arranged
The outside in furnace shell, and locator card 4 on the outside of furnace shell avoids furnace shell both sides gudgeon position, locator card 4 is that specification is 800 × 400
The 16Mn steel plates of × 30mm are made, and the side of the locator card 4 opens up to ensure locator card 4 with upper furnace shell 2 and lower furnace shell 3
The consistent semi-circular hole of joint gap, then uses formal welding material and welding procedure welding by welder, in welding process really
Protect weld seam not ftracture, postwelding inspection is carried out after the completion of last tack welding, when there is defect, it is necessary to root out tack welding meat and enter again
Row tack welding, when carrying out tack welding, outside carries out tack welding in body of heater 1, and fusion length is 300mm, adjacent weld spacing
It is 300mm.
3）Formal welding：
Locator card 4 is first removed before formal welding, the inner side of body of heater 1 is welded afterwards, until weld joint on inner side is being welded to its length
Untill when 2/3, to be preheated with before formal welding after dismounting locator card 4, preheating temperature is formal to weld in 125 ± 25 DEG C of intervals
In termination process, some welder's weldings simultaneously at same direction.
4）Post weld heat treatment：
After formal welding is finished, in the case where weld seam without cooling down completely, it is powered come to weld seam by heater 5
Place's heat temperature raising up to temperature reaches 200 DEG C and is incubated 2 hours, to remove the hydrogen remained in weld seam, protect by the periphery of heater 5 parcel
Warm cotton 6.
5）Final welding：
The back chipping treatment of weld joint on inner side is first carried out, then welds the outside of body of heater 1, after the completion of outer side weld, finally complete body of heater 1
The welding of remaining inside weld seam.
The present invention proposes a kind of welding method of large-scale steelmaking converter body of heater, and the present invention is carried out successively by following operation：
Confirm assembling quality, check tack weld, welding region cleaning, preheating is welded at groove 2/3 from converter, the polishing of outside back chipping,
Back chipping quality determination, weld joint on inner side welding, outer side weld welding, face of weld cleaning, post weld heat treatment, visual examination of weld,
UT checks that wherein weld joint on inner side welding and outer side weld are intended to preheating before welding and carrying out, and the present invention is by welding sequence and welds
Method efficient combination, improves the quality and operating efficiency of welding, reduces mass defect, increases a solder yield.
Embodiment above is only that the preferred embodiment of the present invention is described, and not the scope of the present invention is entered
Row is limited, and on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art make to technical scheme
The various modifications for going out and improvement, all should fall into the protection domain of claims of the present invention determination.
Claims (6)
1. a kind of welding method of large-scale steelmaking converter body of heater, it is characterised in that comprise the following steps：
1）Preparation of construction before welding body of heater：
First in converter body（1）Surrounding 11.5m elevation locations set up escape way, to facilitate applying for human users and cable
If, converter body（1）Including upper furnace shell（2）With lower furnace shell（3）, finally the diameter to furnace shell detect that the diameter of furnace shell is inclined
Difference should meet design requirement, and the difference of maximum gauge and minimum diameter cannot be greater than the 3/1000 of furnace shell intended diameter, and furnace shell is high
The limit deviation of degree is ± the 3/1000 of design height, and fire door plane is 1/1000 to the squareness tolerance of furnace shell axis；
2）Tack welding：
First by converter body（1）Upper furnace shell（2）With lower furnace shell（3）By locator card（4）Link together, then adopted by welder
With formal welding material and welding procedure welding, ensure that weld seam does not ftracture in welding process, welded after the completion of last tack welding
After check, when there is defect, it is necessary to root out tack welding meat and re-start tack welding；
3）Formal welding：
Locator card is first removed before formal welding（4）, body of heater is welded afterwards（1）Inner side, until weld joint on inner side is being welded to its length
Untill when 2/3, in formal welding process, some welder's weldings simultaneously at same direction；
4）Post weld heat treatment：
After formal welding is finished, in the case where weld seam without cooling down completely, by heater（5）It is powered and comes to commissure
Heat temperature raising until temperature reaches 200 DEG C and is incubated 2 hours, to remove the hydrogen of residual in weld seam；
5）Final welding：
The back chipping treatment of weld joint on inner side is first carried out, then welds body of heater（1）Outside, after the completion of outer side weld, finally completes body of heater（1）
The welding of remaining inside weld seam.
2. the welding method of large-scale steelmaking converter body of heater according to claim 1, it is characterised in that step 2）Described in it is fixed
Position card（4）For specification for the 16Mn steel plates of 800 × 400 × 30mm are made, the locator card（4）Side opens up to ensure
Locator card（4）With upper furnace shell（2）With lower furnace shell（3）The consistent semi-circular hole of joint gap.
3. the welding method of large-scale steelmaking converter body of heater according to claim 1, it is characterised in that step 2）Described in it is fixed
Position card（4）It is uniformly arranged on outside in furnace shell, and the locator card on the outside of furnace shell（4）Avoid furnace shell both sides gudgeon position.
4. the welding method of large-scale steelmaking converter body of heater according to claim 1, it is characterised in that step 2）In carry out
During tack welding, body of heater（1）Interior outside carries out tack welding, and fusion length is 300mm, and adjacent weld spacing is 300mm.
5. the welding method of large-scale steelmaking converter body of heater according to claim 1, it is characterised in that step 3）In remove
Locator card（4）To be preheated with before formal welding afterwards, preheating temperature is in 125 ± 25 DEG C of intervals.
6. the welding method of large-scale steelmaking converter body of heater according to claim 1, it is characterised in that step 4）Heater
（5）Wrap up heat-preservation cotton in periphery（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608032.4A CN105171261B (en) | 2015-09-23 | 2015-09-23 | A kind of welding method of large-scale steelmaking converter body of heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608032.4A CN105171261B (en) | 2015-09-23 | 2015-09-23 | A kind of welding method of large-scale steelmaking converter body of heater |
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| CN105171261A CN105171261A (en) | 2015-12-23 |
| CN105171261B true CN105171261B (en) | 2017-06-20 |
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| CN201510608032.4A Active CN105171261B (en) | 2015-09-23 | 2015-09-23 | A kind of welding method of large-scale steelmaking converter body of heater |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755205A (en) * | 2016-04-14 | 2016-07-13 | 中国十七冶集团有限公司 | Combination-method mounting method of ultra-large converter |
| CN109385519B (en) * | 2018-09-30 | 2020-07-28 | 上海宝冶集团有限公司 | Modular installation method of aluminum ingot pushing type heating furnace |
| CN111360439A (en) * | 2020-03-26 | 2020-07-03 | 中国十七冶集团有限公司 | Online welding method for transverse welding seam of corner of large-scale blast furnace shell |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5947315A (en) * | 1982-09-09 | 1984-03-17 | Nippon Kokan Kk <Nkk> | Method for reparing shell of converter body |
| JPH10216946A (en) * | 1997-02-07 | 1998-08-18 | Nkk Corp | Welding equipment for fitting to sleeve brick at tap hole of converter |
| CN100526000C (en) * | 2007-12-28 | 2009-08-12 | 中国第十七冶金建设有限公司 | Combination method mounting technique for ultra-large type steel converter |
| CN103205526A (en) * | 2013-03-04 | 2013-07-17 | 中国十七冶集团有限公司 | Pushing installation method for large converter |
| CN103962808B (en) * | 2014-05-16 | 2016-07-06 | 中国十九冶集团有限公司 | Fabrication and installation method for last furnace shell |
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Denomination of invention: A welding method for large scale converter body Effective date of registration: 20210519 Granted publication date: 20170620 Pledgee: Industrial and Commercial Bank of China Limited MAANSHAN Tuanjie square sub branch Pledgor: CHINA MCC17 GROUP Co.,Ltd. Registration number: Y2021980003566 |
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Date of cancellation: 20230810 Granted publication date: 20170620 Pledgee: Industrial and Commercial Bank of China Limited MAANSHAN Tuanjie square sub branch Pledgor: CHINA MCC17 GROUP Co.,Ltd. Registration number: Y2021980003566 |
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