CN118385797A - Welding method for sealing gas in blast furnace tuyere medium sleeve - Google Patents
Welding method for sealing gas in blast furnace tuyere medium sleeve Download PDFInfo
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- CN118385797A CN118385797A CN202410323584.XA CN202410323584A CN118385797A CN 118385797 A CN118385797 A CN 118385797A CN 202410323584 A CN202410323584 A CN 202410323584A CN 118385797 A CN118385797 A CN 118385797A
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- steel
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- 238000003466 welding Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 102
- 239000010959 steel Substances 0.000 claims abstract description 102
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims description 6
- 238000005336 cracking Methods 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a welding method for sealing gas in a middle sleeve of a blast furnace tuyere, which comprises a middle sleeve copper ring, a middle sleeve steel ring and a large sleeve steel ring which are sequentially arranged from inside to outside along the radial direction; a groove is formed between the middle sleeve steel ring and the large sleeve steel ring; manufacturing steel bars, and manufacturing inclined planes on the inner side and the outer side of the steel bars; placing the steel bar in the groove to form grooves between the inner inclined surface of the steel bar and the middle sleeve steel ring and between the outer inclined surface of the steel bar and the large sleeve steel ring; and welding the groove to form a welding seam between the middle steel ring and the large steel ring. The welding method for sealing the gas in the blast furnace tuyere sleeve provided by the invention has the advantages that the risk of cracking a welding line is greatly reduced, and the gas leakage is avoided.
Description
Technical Field
The invention relates to the technical field of improving production safety of blast furnace protection cooling equipment, in particular to a welding method for sealing a blast furnace tuyere medium sleeve gas.
Background
The blast furnace uses steel plate as furnace shell, and the inside of the shell is lined with refractory bricks. The blast furnace body is divided into five parts from top to bottom, namely a furnace throat, a furnace body, a furnace waist, a furnace abdomen and a furnace hearth. The method has the advantages of good technical and economic indexes, simple process, large production quantity, high labor production efficiency, low energy consumption and the like, so that the iron produced by the method accounts for the vast majority of the total world iron yield.
Damping down the blast furnace, namely planning maintenance of the blast furnace, and stopping production of the blast furnace; and (5) re-blowing the blast furnace, namely, after the blast furnace is overhauled, starting production. Under the working condition of blast furnace smelting production, when the blast furnace is in damping down and is in ventilation, the phenomenon of cracking of a welding part between a copper sleeve and a middle sleeve steel ring and a welding part between the middle sleeve steel ring and a large sleeve steel ring in the blast furnace is easy to cause due to the action of thermal expansion and contraction, and after the cracking, the dissimilar metals of copper steel still installed in the large sleeve steel ring cannot be welded on line, so that only new middle sleeve spare parts can be replaced, and the production ton iron cost is increased. In addition, in the production process, the leakage of the tuyere gas directly affects the personal safety and the safety production of the blast furnace process.
Disclosure of Invention
The invention aims to provide a welding method for sealing the gas in the tuyere of a blast furnace, which greatly reduces the risk of cracking of a welding line and avoids gas leakage.
In order to achieve the aim, the invention provides a welding method for sealing gas in a middle sleeve of a blast furnace tuyere, which comprises a middle sleeve copper ring, a middle sleeve steel ring and a large sleeve steel ring which are sequentially arranged from inside to outside along the radial direction; a groove is formed between the middle sleeve steel ring and the large sleeve steel ring; manufacturing steel bars, and manufacturing inclined planes on the inner side and the outer side of the steel bars; placing the steel bar in the groove to form grooves between the inner inclined surface of the steel bar and the middle sleeve steel ring and between the outer inclined surface of the steel bar and the large sleeve steel ring; and welding the groove to form a welding seam between the middle steel ring and the large steel ring.
As a further improvement of the invention, the width L1 of the groove is 25-30mm, and the depth D1 of the groove is 10-20mm; the maximum width L2 of the steel bar is 15-20mm, and the thickness D2 of the steel bar is 10-20mm.
As a further improvement of the invention, the grooves are in a ring shape, the number of steel bars in the grooves is at least two, and the steel bars are arc-shaped, and each steel bar is sequentially arranged along the grooves.
As a further improvement of the invention, in the process of welding the groove, the steel bar is firstly welded uniformly in sections, and then the sealing welding is filled in the whole circle.
As a further improvement of the invention, a second groove is manufactured and welded at the adjacent position of the middle sleeve copper ring and the middle sleeve steel ring.
Advantageous effects
Compared with the prior art, the welding method for sealing the blast furnace tuyere medium sleeve gas has the advantages that:
1. The groove between the middle sleeve steel ring and the large sleeve steel ring adopts steel bar filling welding, so that the welding seam cracking between the middle sleeve steel ring and the large sleeve steel ring can be greatly reduced, the cracking between the middle sleeve copper ring and the middle sleeve steel ring can be reduced, the welding life between the middle sleeve copper ring and the middle sleeve steel ring is prolonged, gas leakage is avoided, and the personal safety and the process production safety are improved.
2. The structure is simple to manufacture and the service life is long.
3. Reducing the ton iron cost of the blast furnace.
The invention will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of a conventional method for welding a blast furnace tuyere medium sleeve gas plug;
FIG. 2 shows one of the steps of a welding method for plugging the gas in the tuyere of the blast furnace;
FIG. 3 is a second step of the welding method for the gas plugging of the blast furnace tuyere medium sleeve in the scheme;
fig. 4 is a top view of fig. 3.
Detailed Description
Embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, in the conventional welding method for sealing the middle sleeve gas in the tuyere of the blast furnace, a middle sleeve copper ring 1, a middle sleeve steel ring 2 and a large sleeve steel ring 3 are sequentially arranged, and a gap is reserved between the outer side of the middle sleeve steel ring 2 and the inner side of the large sleeve steel ring 3. Wherein, one side of the middle sleeve steel ring 2 and the large sleeve steel ring 3, which are adjacent, is provided with an iron strip, and one side surface of the iron strip is tightly attached to the middle sleeve steel ring 2 and the large sleeve steel ring 3 and is sealed and welded.
Examples
The specific embodiment of the invention is shown in fig. 2 to 4, and the welding method for sealing the gas of the middle sleeve of the blast furnace tuyere comprises a middle sleeve copper ring 1, a middle sleeve steel ring 2 and a large sleeve steel ring 3 which are sequentially arranged from inside to outside along the radial direction. A groove 6 is formed between the middle sleeve steel ring 2 and the large sleeve steel ring 3. The steel bar 4 is manufactured, and inclined surfaces 41 are formed on both inner and outer sides of the steel bar 4. The steel bar 4 is placed in the groove 6, so that grooves are formed between the inner inclined surface 41 of the steel bar 4 and the middle sleeve steel ring 2 and between the outer inclined surface 41 and the large sleeve steel ring 3. And welding the groove to form a welding seam 8 between the middle sleeve steel ring 2 and the large sleeve steel ring 3. The solder 5 is located in the groove.
Wherein, the material of the middle sleeve copper ring 1 is oxygen-free copper, the material of the middle sleeve steel ring 2 is Q235 iron, and the material of the large sleeve steel ring 3 is ZG2630-450 steel.
The width L1 of the groove 6 is 25-30mm, and the depth D1 of the groove 6 is 10-20mm. The maximum width L2 of the steel strip 4 is 15-20mm and the thickness D2 of the steel strip 4 is 10-20mm. In this embodiment, the width L1 of the groove 6 is 30mm and the depth D1 is 15mm. The maximum width L2 of the bar 4 is 20mm and the thickness D2 is 10mm.
The groove 6 is in a ring shape, the number of the steel bars 4 in the groove 6 is at least two, and the steel bars 4 are in an arc shape, and the steel bars 4 are sequentially arranged along the groove 6. In the embodiment, 4 steel bars 4 are arranged in the groove 6, and each steel bar 4 is in a 1/4 circular arc.
In the process of welding the groove, the steel bar 4 is uniformly welded in sections, and then the whole circle is filled with sealing welding, so that the cracking of the copper steel welding seam of the middle sleeve caused by welding stress can be avoided.
And a second groove 7 is manufactured and welded at the adjacent position of the middle sleeve copper ring 1 and the middle sleeve steel ring 2. The angle of the second groove 7 is 70-80 deg..
The groove 6 between the tuyere medium sleeve steel ring 2 and the large sleeve steel ring 3 is filled and welded by steel bars 4, so that the smelting strength of a blast furnace can be reduced, the weld joint stretch-break caused by thermal expansion and cold contraction of a tuyere assembly can be repaired, and serious gas leakage can be avoided. And during welding, the copper steel welding seam is required to be uniformly welded, so that the welding stress is prevented from being pulled to crack, and spare parts are prevented from being damaged.
The invention has been described in connection with the preferred embodiments, but the invention is not limited to the embodiments disclosed above, but it is intended to cover various modifications, equivalent combinations according to the essence of the invention.
Claims (5)
1. The welding method for sealing the middle sleeve gas of the blast furnace tuyere is characterized by comprising a middle sleeve copper ring (1), a middle sleeve steel ring (2) and a large sleeve steel ring (3) which are sequentially arranged from inside to outside along the radial direction; a groove (6) is formed between the middle sleeve steel ring (2) and the large sleeve steel ring (3); manufacturing a steel bar (4), and manufacturing inclined planes (41) on the inner side and the outer side of the steel bar (4); placing the steel bar (4) in the groove (6) to form grooves between the inner inclined surface (41) of the steel bar (4) and the middle sleeve steel ring (2) and between the outer inclined surface (41) and the large sleeve steel ring (3); and welding the groove to form a welding seam (8) between the middle sleeve steel ring (2) and the large sleeve steel ring (3).
2. The welding method for sealing the sleeve gas in the tuyere of the blast furnace according to claim 1, wherein the width L1 of the groove (6) is 25-30mm, and the depth D1 of the groove (6) is 10-20mm; the maximum width L2 of the steel bar (4) is 15-20mm, and the thickness D2 of the steel bar (4) is 10-20mm.
3. The welding method for sealing off the sleeve gas in the tuyere of the blast furnace according to claim 1 or 2, wherein the groove (6) is in a circular ring shape, the number of the steel bars (4) in the groove (6) is at least two and the steel bars are arc-shaped, and each steel bar (4) is sequentially arranged along the groove (6).
4. The welding method for sealing the gas in the tuyere of the blast furnace according to claim 1, wherein in the process of welding the groove, the steel bar (4) is uniformly welded in sections and then is fully filled with sealing welding.
5. The welding method for sealing the middle sleeve gas of the blast furnace tuyere according to claim 1, wherein a second groove (7) is manufactured and welded at the adjacent position of the middle sleeve copper ring (1) and the middle sleeve steel ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410323584.XA CN118385797A (en) | 2024-03-21 | 2024-03-21 | Welding method for sealing gas in blast furnace tuyere medium sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410323584.XA CN118385797A (en) | 2024-03-21 | 2024-03-21 | Welding method for sealing gas in blast furnace tuyere medium sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118385797A true CN118385797A (en) | 2024-07-26 |
Family
ID=91994619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410323584.XA Pending CN118385797A (en) | 2024-03-21 | 2024-03-21 | Welding method for sealing gas in blast furnace tuyere medium sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118385797A (en) |
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2024
- 2024-03-21 CN CN202410323584.XA patent/CN118385797A/en active Pending
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