CN101767243B - Method for welding tuyere-cooler casing and blast furnace casing - Google Patents
Method for welding tuyere-cooler casing and blast furnace casing Download PDFInfo
- Publication number
- CN101767243B CN101767243B CN 200810204885 CN200810204885A CN101767243B CN 101767243 B CN101767243 B CN 101767243B CN 200810204885 CN200810204885 CN 200810204885 CN 200810204885 A CN200810204885 A CN 200810204885A CN 101767243 B CN101767243 B CN 101767243B
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- CN
- China
- Prior art keywords
- welding
- tuyere
- furnace shell
- big sleeve
- tuyere big
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 21
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 4
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 4
- 238000005485 electric heating Methods 0.000 claims abstract description 4
- 230000035515 penetration Effects 0.000 claims abstract description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to the field of a smelting equipment installing method, in particular to a method for welding a tuyere-cooler casing and a blast furnace casing. The method comprises the step of fixing a tuyere-cooler casing (1) on a blast furnace casing (2), wherein the tuyere-cooler casing (1) forms a round table shape and iis provided with a through hole at the middle part. The method is characterized in that the wall thickness of the tuyere-cooler casing (1) is 1/3-2/3 of the thickness of the blast furnace casing (2); the tuyere-cooler casing (1) is fixed on the blast furnace casing (2) by welding; the carbon dioxide gas arc welding is adopted during welding; a weld joint (3) adopts a penetration T-shaped weld joint, the groove angle is 35 DEG-45 DEG, and both sides of the weld joint (3) adopt rigidly fixed anti-deformation measures and electric heating sheets to accompany preheating. The invention can avoid the problem of welding stress concentration and decrease the running cost.
Description
Technical field
The present invention relates to ironmaking equipment and make the installation method field, be specially the welding method between a kind of tuyere big sleeve and last furnace shell.
Background technology
The tuyere big sleeve of blast furnace is one of critical component of blast furnace air-supply pipeline, effect is supporting tuyere medium sleeve and little cover, and itself and blast furnace be connected to be integrated, and it and tuyere medium sleeve, tuyere small sleeve are assembled together, add other parts such as cooling water pipe, form the tuyere device of blast furnace.Tuyere big sleeve often is hollow truncated cone-shaped, is cast by cast iron or cast steel, and inside is cast with coiled pipe, the water flowing cooling, and its front end conical surface and tuyere medium sleeve upper end cone match, upper end and body of heater assembly connection are together.Usually, the method for attachment of tuyere big sleeve and last furnace shell is: elder generation's welding tuyere flange on last furnace shell is fixedly connected with tuyere big sleeve with bolt, thereby tuyere big sleeve is fixed on the blast furnace with tuyere flange.Because flange ladder longitudinal section is step-like characteristics, welded flange on furnace shell, the diameter of its weld seam must be greater than the diameter of tuyere big sleeve, and this is just so that furnace shell uptake flange spacing is smaller.For super-huge blast furnace because tuyere big sleeve quantity is more, just so that on the furnace shell perforate too much, the weld spacing of tuyere flange is too small, so that welding stress is too concentrated, even sometimes can't arrange on the overstocked furnace shell of tuyere flange.
Summary of the invention
In order to overcome the defective of prior art, provide a kind of spacing rational air-supply apparatus of blast furnace installation method, the invention discloses the welding method between a kind of tuyere big sleeve and last furnace shell.
The present invention reaches goal of the invention by following technical solution:
Welding method between a kind of tuyere big sleeve and last furnace shell; tuyere big sleeve is fixed on the last furnace shell; used tuyere big sleeve is truncated cone-shaped; the center has through hole; it is characterized in that: the tuyere big sleeve wall thickness is 1/3rd to 2/3rds of last furnace shell thickness; tuyere big sleeve is fixed by welding on the last furnace shell; carbon dioxide gas arc welding is adopted in welding; weld seam adopts penetration T shape weld seam; bevel angle is 35 °～45 °, and anti-deformation measure and the electric heating sheets taking in the weld seam both sides during welding to rigidly fix are followed preheating.
Welding method between described tuyere big sleeve and last furnace shell, it is characterized in that: each tuyere big sleeve adopts and is symmetrically welded synchronously during welding, be on the weld seam of circumference by 2 whiles at last furnace shell, in the same way, synchronized welding, on two end points of initial 2 diameters that lay respectively at the weld seam that is circumference, adopt multi-pass welding.
Welding method between described tuyere big sleeve and last furnace shell is characterized in that: tuyere big sleeve is symmetric in the last furnace shell cross section, and weld spacing is not less than 250cm.
Welding method between described tuyere big sleeve and last furnace shell is characterized in that: the tuyere big sleeve wall thickness is 1/2nd of last furnace shell thickness, and groove angle is 40 °.
Adopt method of the present invention, can with tuyere big sleeve directly and furnace shell be welded to connect, cancelled tuyere flange, so just reduced the diameter of weld seam, under the prerequisite that does not reduce tuyere big sleeve quantity, increased weld spacing, in certain blast furnace overhaul, if new furnace shell adopts tuyere flange to connect, furnace shell verge of opening spacing is 60mm, also want the bevel welding, then two weld seams adopt tuyere big sleeve directly and the furnace shell welding method with overlapping, and furnace shell verge of opening spacing is 310mm; The problem that the welding stress of having avoided weld seam too to approach and having caused is concentrated, the plant maintenance amount in the time of also can reducing operation of blast furnace has simultaneously reduced operating cost.
Description of drawings
Fig. 1 is the generalized section that the present invention plants tuyere big sleeve;
Fig. 2 is the weld seam enlarged diagram among the present invention;
Fig. 3 is the welding direction schematic diagram when tuyere big sleeve welds among the present invention;
Fig. 4 is that the air port is enclosed within greatly distribution schematic diagram on the last furnace shell cross section among the present invention.
The specific embodiment
Below further specify the present invention by specific embodiment.
Fix 40 tuyere big sleeves at last furnace shell, the large cover 1 of blast-furnace tuyere as shown in Figure 1, be truncated cone-shaped, the center has through hole, wall thickness is 1/2nd of last furnace shell 2 thickness, be fixed by welding on the last furnace shell 2, concrete steps are: furnace shell bevel → tuyere big sleeve is installed, is located → rigidly fix → the large face groove of groove cleaning → preheating → welding → back side gouge back chipping → welding facet groove → weld seam Non-Destructive Testing → bulk heat treatmet
Claims (3)
1. the welding method between a tuyere big sleeve and last furnace shell, tuyere big sleeve (1) is fixed on the last furnace shell (2), used tuyere big sleeve (1) is truncated cone-shaped, the center has through hole, it is characterized in that: tuyere big sleeve (1) wall thickness is 1/3rd to 2/3rds of last furnace shell (2) thickness, tuyere big sleeve (1) is fixed by welding on the last furnace shell (2), carbon dioxide gas arc welding is adopted in welding, weld seam (3) adopts penetration T shape weld seam, bevel angle is 35 °～45 °, and anti-deformation measure and the electric heating sheets taking to rigidly fix in weld seam (3) both sides during welding are followed preheating;
Each tuyere big sleeve (1) adopts and is symmetrically welded synchronously during welding, last furnace shell (2) be the weld seam (3) of circumference upper by 2 whiles, in the same way, synchronized welding, on two end points of initial 2 diameters that lay respectively at the weld seam (3) that is circumference, adopt multi-pass welding.
2. the welding method between tuyere big sleeve as claimed in claim 1 and last furnace shell, it is characterized in that: tuyere big sleeve (1) is symmetric in last furnace shell (2) cross section, and weld seam (3) spacing is not less than 250cm.
3. the welding method between tuyere big sleeve as claimed in claim 1 and last furnace shell, it is characterized in that: tuyere big sleeve (1) wall thickness is 1/2nd of last furnace shell (2), weld seam (3) bevel angle is 40 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810204885 CN101767243B (en) | 2008-12-30 | 2008-12-30 | Method for welding tuyere-cooler casing and blast furnace casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810204885 CN101767243B (en) | 2008-12-30 | 2008-12-30 | Method for welding tuyere-cooler casing and blast furnace casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101767243A CN101767243A (en) | 2010-07-07 |
| CN101767243B true CN101767243B (en) | 2013-03-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810204885 Expired - Fee Related CN101767243B (en) | 2008-12-30 | 2008-12-30 | Method for welding tuyere-cooler casing and blast furnace casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101767243B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255252B (en) * | 2013-05-30 | 2015-01-28 | 河北天宇高科冶金铸造有限公司 | Steel casting big sleeve and preparation method thereof |
| CN103624362A (en) * | 2013-11-27 | 2014-03-12 | 北京首钢建设集团有限公司 | Blast furnace shell air opening flange hole forming method |
| CN105583501A (en) * | 2016-02-20 | 2016-05-18 | 首钢水城钢铁(集团)赛德建设有限公司 | Method for assembly welding of tuyere, taphole frame and furnace body for blast furnace shell manufacturing |
| CN105817745A (en) * | 2016-04-13 | 2016-08-03 | 马鞍山十七冶工程科技有限责任公司 | Welding method for field installation circumferential weld of converter shell |
| CN106929618B (en) * | 2017-04-12 | 2019-03-15 | 上海宝冶集团有限公司 | The big online prosthetic device of set inner hole of blast-furnace tuyere |
| CN111360374A (en) * | 2020-03-26 | 2020-07-03 | 中国十七冶集团有限公司 | Large-scale blast furnace tuyere flange welding method |
| CN115446426A (en) * | 2022-10-14 | 2022-12-09 | 河北冶金建设集团有限公司 | Off-line installation method for large-scale blast furnace tuyere flange |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2265378Y (en) * | 1996-06-18 | 1997-10-22 | 张甲义 | Flow-jetting type blast furnace tuyere |
| CN2305612Y (en) * | 1997-05-14 | 1999-01-27 | 户瑞兰 | High efficiency energy saving boiler |
| CN2310768Y (en) * | 1997-09-26 | 1999-03-17 | 李安宁 | Direct steelmaking connection device for blast furnace |
| CN2370012Y (en) * | 1999-04-16 | 2000-03-22 | 杨杰裕 | Jet water cool luyere stock |
| JP2003117658A (en) * | 2001-10-12 | 2003-04-23 | Hitachi Constr Mach Co Ltd | Welding method and weld joint |
| CN201534852U (en) * | 2009-08-19 | 2010-07-28 | 中冶赛迪工程技术股份有限公司 | Connecting structure of blast furnace tuyere sleeve and furnace case |
-
2008
- 2008-12-30 CN CN 200810204885 patent/CN101767243B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2265378Y (en) * | 1996-06-18 | 1997-10-22 | 张甲义 | Flow-jetting type blast furnace tuyere |
| CN2305612Y (en) * | 1997-05-14 | 1999-01-27 | 户瑞兰 | High efficiency energy saving boiler |
| CN2310768Y (en) * | 1997-09-26 | 1999-03-17 | 李安宁 | Direct steelmaking connection device for blast furnace |
| CN2370012Y (en) * | 1999-04-16 | 2000-03-22 | 杨杰裕 | Jet water cool luyere stock |
| JP2003117658A (en) * | 2001-10-12 | 2003-04-23 | Hitachi Constr Mach Co Ltd | Welding method and weld joint |
| CN201534852U (en) * | 2009-08-19 | 2010-07-28 | 中冶赛迪工程技术股份有限公司 | Connecting structure of blast furnace tuyere sleeve and furnace case |
Non-Patent Citations (2)
| Title |
|---|
| 肖机卫 等.韶钢2500m3高炉风口法兰与炉壳.《南方金属》.2006,(第4期),第23-25页. * |
| 陈亮 等.从相关专利看高炉风口技术的发展.《上海金属》.2001,第23卷(第2期),第6-8页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101767243A (en) | 2010-07-07 |
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Address after: 200941 Shanghai City, Baoshan District Road, No. four yuan, 168 Patentee after: SHANGHAI BAOYE GROUP Corp.,Ltd. Address before: 200941 Shanghai City, Baoshan District Road, No. four yuan, 168 Patentee before: SHANGHAI BAOYE GROUP Corp.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 |