CN115537483A - Blast furnace five-way ball dehydrogenation treatment method - Google Patents
Blast furnace five-way ball dehydrogenation treatment method Download PDFInfo
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- CN115537483A CN115537483A CN202211301684.XA CN202211301684A CN115537483A CN 115537483 A CN115537483 A CN 115537483A CN 202211301684 A CN202211301684 A CN 202211301684A CN 115537483 A CN115537483 A CN 115537483A
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- spherical tank
- spherical shell
- way ball
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- 238000006356 dehydrogenation reaction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 72
- 230000001174 ascending effect Effects 0.000 claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000010285 flame spraying Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 229920000742 Cotton Polymers 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a blast furnace five-way ball dehydrogenation treatment method, which comprises the following steps: s1, enabling a spherical tank to be formed by closing a plurality of equatorial spherical shell plates; s2, after the spherical tank is hoisted and formed, adjusting gaps, misalignment, angular deformation and support perpendicularity of all welding seams; s3, performing spot welding on a groove between the equatorial spherical shell plates; s4, performing full welding on the groove by longitudinal welding and then circular welding; s5, detecting a welding seam; s6, modeling the spherical tank through a computer, and lofting four pipe orifices on the surface of the spherical tank; s7, cutting the lofting positions of the four pipe orifices through a cutting machine; s8, sealing the ascending pipe and the descending pipe through a steel plate, and connecting a smoke exhaust pipe on the diffusing pipe; s9, carrying out flame spraying heating on the interior of the spherical tank through a burner pipe; smoke is exhausted and heated to 600 ℃ through the self structure of the five-way ball, and the five-way ball and the external short pipe are used for dehydrogenation treatment, so that the dehydrogenation treatment effect is good.
Description
Technical Field
The invention relates to the technical field of industrial equipment installation, in particular to a blast furnace five-way ball dehydrogenation treatment method.
Background
At present, the five-way ball is very commonly applied to super-large blast furnace engineering, is positioned at the topmost part of a blast furnace and is used as a spherical device for connecting 4 blast furnace gas ascending pipes and 1 blast furnace gas descending pipe, and the size and weight of the super-large blast furnace five-way ball are limited, so that the whole shipment condition of a factory cannot be realized. During construction, the construction is usually carried out in sections, and the assembly and installation are carried out on the construction site. In the field of industrial blast furnace engineering installation, most of blast furnaces adopting the five-way ball structure are large blast furnaces, and due to transportation reasons, the five-way balls are delivered for spare parts and need to be assembled and welded on a construction site, and are hoisted in place after being integrally formed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a blast furnace five-way ball dehydrogenation treatment method, which is characterized in that smoke is discharged and heated to 600 ℃ through the structure of the five-way ball, and dehydrogenation treatment is carried out together with an external short pipe, so that the dehydrogenation treatment effect is good, the structure is not damaged, the operation is easy, and the cost is low.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a blast furnace five-way ball dehydrogenation treatment method comprises the following steps:
s1, a spherical tank is composed of a plurality of equatorial spherical shell plates, a first equatorial spherical shell plate is hoisted and aligned, the first equatorial spherical shell plate is fixed through a cable rope, the verticality is adjusted, foundation bolts are screwed down, a second equatorial spherical shell plate is hoisted, a clamp is used for connecting the second equatorial spherical shell plate with the first spherical shell plate, the lower side of the second equatorial spherical shell plate is supported and stabilized through a supporting column, a third equatorial spherical shell plate is hoisted, the three equatorial spherical shell plates are firmly fixed through the clamp, and the equatorial spherical shell plates are hoisted according to the method so that the equatorial spherical shell plates are closed to form the spherical tank;
s2, after the spherical tank is hoisted and formed, adjusting gaps, misalignment, angular deformation and support perpendicularity of all welding seams;
s3, performing spot welding on the grooves between the equatorial spherical shell plates, wherein the spot welding comprises longitudinal seam spot welding and circular seam spot welding, the length of a welding seam of the longitudinal seam spot welding is 150mm, the interval of the longitudinal seam spot welding is 300mm, and the height of welding seam is 10mm; the circular seam spot welding is welded at the joint of the longitudinal seam spot welding, and the length of the welding seam is 300mm;
s4, full welding is carried out on the groove after longitudinal welding and circular welding, and the full welding thickness is 0-1.0 mm higher than the outer surface of the spherical tank;
s5, detecting a welding line, ensuring that the defects of cracks, air holes, slag inclusion, sinking, non-fusion and undercut are avoided, and cleaning welding slag and splashes;
s6, modeling the spherical tank through a computer, and lofting six pipe orifices on the surface of the spherical tank by taking the circle center of the spherical tank as a coordinate point;
s7, cutting lofting positions of six pipe orifices through a cutting machine, wherein ascending pipes A (three), ascending pipes B (one), descending pipes (one) and diffusing pipes (one) are welded on the six pipe orifices respectively;
s8, sealing the ascending pipe A and the descending pipe through a steel plate, and connecting a smoke exhaust pipe on the diffusing pipe;
s9, coating the spherical tank by using heat insulation cotton, carrying out flame spraying heating on the interior of the spherical tank by using a burner through an ascending pipe B, stopping heating when the heating temperature is over 600 ℃, naturally cooling for 12 hours, and then removing the heat insulation cotton and the steel plate.
In the step S2, the clearance is 2 +/-2 mm, the misalignment is less than or equal to 3mm, the angular deformation is less than or equal to 7mm, and the perpendicularity of the strut is less than or equal to 12mm.
In step S3, the height of the spot welding is flush with the outer surface of the spherical tank.
And S4, firstly carrying out large groove and then carrying out small groove in the full welding process.
The hoisting is a 400t crawler crane, the working condition is 60m main arm +60m tower arm, and the working radius is 33m.
The beneficial effects of the invention are:
1. the method has the advantages that the five-way ball is used for exhausting smoke and heating to 600 ℃ by utilizing the structure of the five-way ball, and the five-way ball is subjected to dehydrogenation treatment together with the external short pipe, so that the dehydrogenation treatment effect is good, the structure is not damaged, the residual stress of a welding line is eliminated, cracks are prevented, the operation is easy, and the cost is low.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
shown in the figure: 1-a support; 2-a spherical tank; 3-riser A; 4-riser B; 5-a downcomer; 6-a diffusing pipe; 7-smoke exhaust pipe; 8-a burner.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1 to 2, a blast furnace five-way ball dehydrogenation treatment method comprises the following steps:
s1, a spherical tank is composed of a plurality of equatorial spherical shell plates, a first equatorial spherical shell plate is hoisted and aligned, fixed by a cable, the verticality is adjusted, foundation bolts are screwed, a second equatorial spherical shell plate is hoisted, a clamp is used for connecting the second equatorial spherical shell plate with the first spherical shell plate, the lower surface of the second equatorial spherical shell plate with the first spherical shell plate is supported and stabilized by a pillar 1, a third equatorial spherical shell plate is hoisted, the three equatorial spherical shell plates are firmly fixed by the clamp, and the equatorial spherical shell plates are hoisted according to the method to be closed to form a spherical tank 2;
s2, after the spherical tank 2 is hoisted and formed, adjusting the gaps, the staggered edges, the angular deformation and the perpendicularity of the struts of all welding seams;
s3, performing spot welding on the grooves between the equatorial spherical shell plates, wherein the spot welding comprises longitudinal seam spot welding and circular seam spot welding, the length of a welding seam of the longitudinal seam spot welding is 150mm, the interval of the longitudinal seam spot welding is 300mm, and the height of welding seam is 10mm; the circular seam spot welding is welded at the joint of the longitudinal seam spot welding, and the length of the welding seam is 300mm;
s4, full welding is carried out on the groove after longitudinal welding and circular welding, and the full welding thickness is 0-1.0 mm higher than the outer surface of the spherical tank 2;
s5, detecting a welding line, ensuring that the defects of cracks, air holes, slag inclusion, sinking, non-fusion and undercut are avoided, and cleaning welding slag and splashes;
s6, modeling the spherical tank 2 through a computer, and lofting six pipe orifices on the surface of the spherical tank 2 by taking the circle center of the spherical tank 2 as a coordinate point;
s7, cutting lofting positions of six pipe orifices through a cutting machine, and respectively welding ascending pipes A3 (three), ascending pipes B4 (one), descending pipes 5 (one) and diffusing pipes 6 (one) on the six pipe orifices;
s8, sealing the ascending pipe A3, the ascending pipe B4 and the descending pipe 5 through a steel plate, and connecting a smoke exhaust pipe 7 on the diffusing pipe 6;
s9, coating the spherical tank 2 by heat-preservation cotton, carrying out flame spraying heating on the interior of the spherical tank 2 by the combustor 8 through the ascending pipe B4, stopping heating when the heating temperature is over 600 ℃, naturally cooling for 12 hours, and removing the heat-preservation cotton and the steel plate.
In the step S2, the clearance is 2 +/-2 mm, the misalignment is less than or equal to 3mm, the angular deformation is less than or equal to 7mm, and the perpendicularity of the strut is less than or equal to 12mm.
In step S3, the height of the spot welding is flush with the outer surface of the spherical tank 2.
And S4, firstly carrying out large groove and then carrying out small groove in the full welding process.
The hoisting is a 400t crawler crane, the working condition is 60m main arm +60m tower arm, and the working radius is 33m.
The method has the advantages that through the completion of the hole opening on the spherical tank 2 of the five-way ball and the connection of the inlet and outlet pipelines to the short pipes, the short pipes are taken for dehydrogenation treatment after the welding is completed, the welding quality of the five-way ball is greatly improved through the mounted five-way ball, the method utilizes the self structure of the five-way ball to exhaust smoke and heat the smoke to 600 ℃, and the smoke is subjected to dehydrogenation treatment together with the external short pipes, so that the dehydrogenation treatment effect is good, the structure is not damaged, the residual stress of a welding line is eliminated, cracks are prevented from being generated, the operation is easy, and the cost is low.
The dehydrogenation treatment is carried out by an internal combustion method, and the specific operation method comprises the following steps:
1. the five-way ball group is welded, and 100% of nondestructive inspection of each welding line is finished and meets the design requirement;
2. adding a blind plate to each short pipe, and manufacturing a steel plate with t =10 for the blind plate;
3. the diffusing pipe 6 at the top of the five-way ball is used as a smoke outlet, the diameter of the diffusing pipe 6 is larger than 800mm, and a smoke exhaust pipe 7 which is 1 meter long and is phi 480 multiplied by 10mm can be connected on the blind plate after the blind plate is plugged;
4. an ascending pipe B4 at the lower part of the five-way ball is used as a combustion port, and a hole is formed in a blind plate of the ascending pipe B4 to be connected into the ball according to the size of the ascending pipe B4;
5. adopting 12 thermocouples to automatically measure the temperature, wherein the thermocouples are respectively connected with 1 thermocouple at the blind plate of each short pipe and placed in the shell for measurement in the shell, and the thermocouples are respectively placed at the periphery and the upper part and the lower part outside the shell for measurement outside the shell;
6. the five-way ball with the short pipes are insulated, and covered and insulated by 120 thick aluminum silicate insulation cotton;
7. a specially-made lengthened burner is connected with a burner, and the burner adopts a diesel burner;
8, the temperature in the sphere is raised to the temperature required by dehydrogenation treatment by combustion heating of the diesel burner, thereby achieving the aim of dehydrogenation of the welding seam.
The bracket 1 is used for temporarily supporting the five-way balls by adopting a rigid frame which is manufactured at the top of the force dust collector and then connecting HW400 x 11 x 18 steel as a jig frame, and is arranged right below the five-way balls of a 73.35m furnace top travelling platform, so that the steel materials are greatly saved by 80%.
The total weight of the assembled five-way ball is 51t, so that a 400t crawler crane is adopted, the working condition is 60m main arm +60m tower arm, the working radius is 33m, the hoisting requirement is met, and during hoisting, the combined supporting piece at the bottom of the lifted ball is required to be vertical, so that the ball can be quickly and accurately placed in place. And creates favorable conditions for the installation of the A-shaped elbow of the ascending pipe and the descending pipe. Three-point binding and hoisting are adopted during hoisting, so that the angle can be conveniently leveled and adjusted, two points are connected in series by using inverted chains, the five-way ball is hoisted to the temporary pipe support of the mounting platform, in order to ensure the overall stability of the five-way ball after the five-way ball is loosened at the mounting position, H400 x 400 section steel is needed to rigidly connect the five-way ball with the nearby pressure-equalizing platform, and safety is guaranteed.
The above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and it will be understood that various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention.
Claims (5)
1. A blast furnace five-way ball dehydrogenation treatment method is characterized by comprising the following steps: the method comprises the following steps:
s1, a spherical tank (2) consists of a plurality of equator spherical shell plates, a first equator spherical shell plate is hoisted and aligned, fixed by a cable, the verticality is adjusted, foundation bolts are screwed, a second equator spherical shell plate is hoisted, the second equator spherical shell plate is connected with the first spherical shell plate by a clamp, the lower part of the second equator spherical shell plate is supported and stabilized by a pillar (1), a third equator spherical shell plate is hoisted, the three equator spherical shell plates are firmly fixed by the clamp, and the equator spherical shell plates are hoisted according to the method to close the equator spherical shell plates to form the spherical tank (2);
s2, after the spherical tank (2) is hoisted and formed, adjusting the gaps, the misalignment, the angular deformation and the perpendicularity of the struts of all welding seams;
s3, performing spot welding on the grooves between the equatorial spherical shell plates, wherein the spot welding comprises longitudinal seam spot welding and circular seam spot welding, the length of a welding seam of the longitudinal seam spot welding is 150mm, the interval of the longitudinal seam spot welding is 300mm, and the height of welding seam is 10mm; the circular seam spot welding is welded at the joint of the longitudinal seam spot welding, and the length of the welding seam is 300mm;
s4, full welding is carried out on the groove through longitudinal joint and then circular joint, and the full welding thickness is 0-1.0 mm higher than that of the outer surface of the spherical tank (2);
s5, detecting a welding seam, ensuring that the defects of cracks, air holes, slag inclusion, sinking, non-fusion and undercut are avoided, and cleaning welding slag and splashes;
s6, modeling the spherical tank (2) through a computer, and lofting six pipe orifices on the surface of the spherical tank (2) by taking the circle center of the spherical tank (2) as a coordinate point;
s7, cutting lofting positions of six pipe orifices through a cutting machine, and respectively welding an ascending pipe A (3), an ascending pipe B (4), a descending pipe (5) and a diffusing pipe (6) on the six pipe orifices;
s8, sealing the ascending pipe A (3), the ascending pipe B (4) and the descending pipe (5) through a steel plate, and connecting a smoke exhaust pipe (7) on the diffusing pipe (6);
s9, coating the spherical tank (2) by using heat insulation cotton, carrying out flame spraying heating on the interior of the spherical tank (2) by using a burner (8) through an ascending pipe B (4), stopping heating when the heating temperature is over 600 ℃, naturally cooling for 12 hours, and then removing the heat insulation cotton and the steel plate.
2. The blast furnace five-way ball dehydrogenation processing method according to claim 1, characterized in that: in the step S2, the clearance is 2 +/-2 mm, the misalignment is less than or equal to 3mm, the angular deformation is less than or equal to 7mm, and the perpendicularity of the strut is less than or equal to 12mm.
3. The blast furnace five-way ball dehydrogenation processing method according to claim 1, wherein: in the step S3, the height of the spot welding is flush with the outer surface of the spherical tank (2).
4. The blast furnace five-way ball dehydrogenation processing method according to claim 1, wherein: and S4, firstly carrying out large groove and then carrying out small groove in the full welding process.
5. The blast furnace five-way ball dehydrogenation processing method according to claim 1, wherein: the hoisting is a 400t crawler crane, the working condition is 60m main arm +60m tower arm, and the working radius is 33m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211301684.XA CN115537483A (en) | 2022-10-24 | 2022-10-24 | Blast furnace five-way ball dehydrogenation treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211301684.XA CN115537483A (en) | 2022-10-24 | 2022-10-24 | Blast furnace five-way ball dehydrogenation treatment method |
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| CN115537483A true CN115537483A (en) | 2022-12-30 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01177308A (en) * | 1988-01-07 | 1989-07-13 | Sumitomo Metal Ind Ltd | Method and device for discharging coke from blast furnace |
| KR20030052072A (en) * | 2001-12-20 | 2003-06-26 | 주식회사 포스코 | Apparatus for removing of adherent materials of blast furnace inner wall |
| CN101737614A (en) * | 2010-01-19 | 2010-06-16 | 上海市特种设备监督检验技术研究院 | Assembly method of shirt support and spherical shell plate of 1000m<3> nitrogen spherical tank |
| CN103343875A (en) * | 2013-06-17 | 2013-10-09 | 武汉一冶钢结构有限责任公司 | Double-layer spherical tank and hoisting method thereof |
| CN107824997A (en) * | 2017-10-31 | 2018-03-23 | 武汉冶钢结构有限责任公司 | The installation method of asymmetric equatorial zone coverboard |
| CN109913599A (en) * | 2019-02-28 | 2019-06-21 | 上海二十冶建设有限公司 | Blast furnace five-way ball on-site consolidation installation method |
-
2022
- 2022-10-24 CN CN202211301684.XA patent/CN115537483A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01177308A (en) * | 1988-01-07 | 1989-07-13 | Sumitomo Metal Ind Ltd | Method and device for discharging coke from blast furnace |
| KR20030052072A (en) * | 2001-12-20 | 2003-06-26 | 주식회사 포스코 | Apparatus for removing of adherent materials of blast furnace inner wall |
| CN101737614A (en) * | 2010-01-19 | 2010-06-16 | 上海市特种设备监督检验技术研究院 | Assembly method of shirt support and spherical shell plate of 1000m<3> nitrogen spherical tank |
| CN103343875A (en) * | 2013-06-17 | 2013-10-09 | 武汉一冶钢结构有限责任公司 | Double-layer spherical tank and hoisting method thereof |
| CN107824997A (en) * | 2017-10-31 | 2018-03-23 | 武汉冶钢结构有限责任公司 | The installation method of asymmetric equatorial zone coverboard |
| CN109913599A (en) * | 2019-02-28 | 2019-06-21 | 上海二十冶建设有限公司 | Blast furnace five-way ball on-site consolidation installation method |
Non-Patent Citations (3)
| Title |
|---|
| 尹雪霏;吴强;李娜;: "3000m~3碳五球罐现场组焊及质量控制", 石油化工设备, no. 03 * |
| 焦海波;: "650m~3球罐现场安装", 石油化工设备, no. 1, pages 51 - 54 * |
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Application publication date: 20221230 |