CN102672121B - Production method for continuous casting of vertical tube blanks - Google Patents
Production method for continuous casting of vertical tube blanks Download PDFInfo
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- CN102672121B CN102672121B CN201210124034.2A CN201210124034A CN102672121B CN 102672121 B CN102672121 B CN 102672121B CN 201210124034 A CN201210124034 A CN 201210124034A CN 102672121 B CN102672121 B CN 102672121B
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- crystallizer
- molten steel
- hollow bloom
- dummy bar
- tundish
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Abstract
The invention discloses a production method for continuous casting of vertical tube blanks. The method comprises the following steps: pouring molten steel in a steel ladle into a middle ladle, transferring to a crystallizer, and cooling the molten steel in the crystallizer to form a hollow tube blank with a certain blank wall thickness; when the molten steel in the crystallizer reaches a certain level, starting a vibrator and starting a support roller device, driving the support roller device to pull a dummy bar to move down, and driving the dummy bar to pull down and pull out the hollow tube blank; and driving a cutting machine to cut the hollow tube blank according to needs, and driving an oblique discharge system to discharge the tube blanks. The production method achieves the purpose of continuous casting of hollow tube blanks, reduces the production cost, saves resources and increases the yield, and fills in the blank of the technology at home and abroad.
Description
Technical field
The present invention relates to metallurgical technology field, particularly a kind of production method of vertical pipe continuous casting.
Background technology
At present, also there is no to produce continuously the conticaster of hollow bloom both at home and abroad.The mode of production of tradition pipe has the solid and hollow bloom of die casting, continuous casting square billet and the solid pipe of circle base, centrifugally cast pipe and pipe.Need be to solid heating of pipe blank, perforation with solid pipe rolling seamless steel pipe.Die casting hollow bloom and its mode of production of centrifugal casting pipe all can not be produced hollow bloom continuously, and its production cost is high, wastes energy, and yields poorly.
Summary of the invention
In order to overcome the defect of prior art, the object of the present invention is to provide a kind of production method of vertical pipe continuous casting, can produce continuously hollow bloom, reduce production costs, economize on resources, improve output.
In order to achieve the above object, the technical solution that the present invention adopts is:
A production method for vertical pipe continuous casting, comprises the following steps:
Step 1, connection device: steel ladle 1 is connected with tundish 3 by long nozzle 2, molten steel induction heating apparatus 12 is installed on tundish 3, tundish 3 is connected with the crystallizer 5 of cored bar tubular type by two submersed nozzles 4, submersed nozzle inserts in crystallizer, submersed nozzle tapping hole is apart from crystallizer 200mm～250mm suitable for reading, crystallizer 5 be externally connected to vibrating device 6, the below of crystallizer 5 is vertically installed with secondary cooling zone group 8, in the roll gap of secondary cooling zone group 8, be installed with dummy bar 7, the head of dummy bar 7 inserts in crystallizer 5, support roller device 9 clamps the bottom of dummy bar 7,
Step 2, fill molten steel steel ladle 1 by long nozzle 2; Molten steel is injected in tundish 3; The molten steel induction heating apparatus 12 of tundish 3, to its heating, ensures that molten steel overheat is 10 ℃～50 ℃, and the time of staying of molten steel in tundish is within 10～15 minutes, to make inclusion floating in molten steel; By submersed nozzle 4, be injected in crystallizer 5, molten steel is the hollow bloom with liquid core in the interior cooling formation of crystallizer 5;
Step 3, the molten steel in crystallizer 5 are during apart from the about 100mm in copper plate of crystallizer top, vibrating device 6 and support roller device 9 start simultaneously, vibrating device 6 vibrates by sine or non-sinusoidal cuve together with crystallizer 5, and its frequency is that 40～240 beats/min, amplitude are ± 2～5mm; Support roller device 9 holder drawing spindle blades 7 and hollow bloom move downward, casting speed: 0.1～0.2mm/min; When band liquid core hollow bloom is drawn out after crystallizer 5, enter secondary cooling zone group 8,8 pairs of hollow blooms of secondary cooling zone group play a supportive role and the hollow bloom of using crystallizer band liquid core solidifies completely; When hollow bloom arrives cutting machine 10, cutting machine 10 starts to cut hollow bloom, after having cut, hollow bloom and dummy bar 7 depart from, and dummy bar 7 transports by oblique knockout system 11, cutting hollow bloom and transporting in the process of dummy bar 7, support roller device 9 is pushed down the downward throwing of hollow bloom always, and after reaching scale, cutting machine 10 cuts hollow bloom again, after having cut, hollow bloom transports by oblique knockout system.
Feature of the present invention is:
1. adopt vertical casting machine to produce continuously hollow bloom, output is high, cost is low, save the energy.
2. tundish 3 is established molten steel induction heating apparatus to control molten steel overheat purify hot metal, and two cover submersed nozzles 4 are arranged symmetrically with and make molten steel evenly smooth in crystallizer in crystallizer 5.
3. adopt the tube type mold 5 of cored bar to make pipe hollow in the interior formation of crystallizer 5.Can change plug according to required aperture, the inner water flowing of plug is cooling, is also provided with the cold gas pipeline of cooling pipe endoporus in plug, and plug skin is provided with self-lubricating material and prevents pipe inner casing and plug bonding.
4. adopt the online adjustable amplitude of hydraulic vibration device 6, frequency and angle of deviation, selection be applicable to cast model of vibration and the vibration parameters of pipe.
5. crystallizer 5 and secondary cooling zone 8 are equipped with curdled appearance and the solidified structure that electromagnetic agitation is improved pipe.
6. the online flame cutting machine technology of pipe is used in conjunction with.
Problem that can not continuous pouring hollow bloom before the invention solves, has reduced production cost, has economized on resources, improved output, has filled up the blank of domestic and international technique.
Accompanying drawing explanation
Fig. 1 is that vertical tube billet continuous casting machine-dummy bar 7 is at the interior schematic diagram of crystallizer 5.
Fig. 2 is the basket pouring schematic diagram with heater.
Fig. 3 is two submersed nozzle cast schematic diagrames.
Fig. 4 is that dummy bar 7 departs from schematic diagram with hollow bloom.
Fig. 5 is that cutting machine 10 is by scale cutting hollow bloom schematic diagram.
Specific implementation method
Below in conjunction with accompanying drawing, the present invention is described in further detail.
A production method for vertical pipe continuous casting, comprises the following steps:
Step 1, with reference to Fig. 1, 2, 3, first connection device: steel ladle 1 is connected with tundish 3 by long nozzle 2, molten steel induction heating apparatus 12 is installed on tundish 3, tundish 3 is connected with the crystallizer 5 of cored bar tubular type by two submersed nozzles 4, submersed nozzle inserts in crystallizer, submersed nozzle tapping hole is apart from crystallizer 200mm～250mm suitable for reading, crystallizer 5 be externally connected to vibrating device 6, the below of crystallizer 5 is vertically installed with secondary cooling zone group 8, in the roll gap of secondary cooling zone group 8, be installed with dummy bar 7, the head of dummy bar 7 inserts in crystallizer 5, support roller device 9 clamps the bottom of dummy bar 7,
Step 2, with reference to Fig. 4, fill the steel ladle 1 of molten steel by long nozzle 2; Molten steel is injected in tundish 3; The molten steel induction heating apparatus 12 of tundish 3, to its heating, ensures that molten steel overheat is 10 ℃～50 ℃, and the time of staying of molten steel in tundish is within 10～15 minutes, to make inclusion floating in molten steel; By submersed nozzle 4, be injected in crystallizer 5, molten steel is the hollow bloom with liquid core in the interior cooling formation of crystallizer 5;
Step 3, with reference to Fig. 5, molten steel in crystallizer 5 is during apart from the about 100mm in copper plate of crystallizer top, vibrating device 6 and support roller device 9 start simultaneously, and vibrating device 6 vibrates by sine or non-sinusoidal cuve together with crystallizer 5, and its frequency is that 40～240 beats/min, amplitude are ± 2～5mm; Support roller device 9 holder drawing spindle blades 7 and hollow bloom move downward, casting speed: 0.1～0.2mm/min; When band liquid core hollow bloom is drawn out after crystallizer 5, enter secondary cooling zone group 8,8 pairs of hollow blooms of secondary cooling zone group play a supportive role and the hollow bloom of using crystallizer band liquid core solidifies completely; When hollow bloom arrives cutting machine 10, cutting machine 10 starts to cut hollow bloom, after having cut, hollow bloom and dummy bar 7 depart from, and dummy bar 7 transports by oblique knockout system 11, cutting hollow bloom and transporting in the process of dummy bar 7, support roller device 9 is pushed down the downward throwing of hollow bloom always, and after reaching scale, cutting machine 10 cuts hollow bloom again, after having cut, hollow bloom transports by oblique knockout system.
Important technological parameters of the present invention
Pipe external diameter: Φ 800mm
Pipe internal diameter: Φ 300mm, Φ 400mm, Φ 500mm
Pipe scale: 5000～8000mm
Casting steel grade: Fine Steel Casting iron, steel alloy, pipe line steel, stainless steel etc.
Length of mould: 900mm
Casting machine metallurgical length :～6000mm
Casting machine annual production: 10～150,000 tons.
Claims (1)
1. a production method for vertical pipe continuous casting, is characterized in that, comprises the following steps:
Step 1, connection device: steel ladle (1) is connected with tundish (3) by long nozzle (2), molten steel induction heating apparatus (12) is installed on tundish (3), tundish (3) is connected with the crystallizer (5) of cored bar tubular type by two submersed nozzles (4), submersed nozzle inserts in crystallizer, submersed nozzle tapping hole is apart from crystallizer 200mm～250mm suitable for reading, crystallizer (5) be externally connected to vibrating device (6), the below of crystallizer (5) is vertically installed with secondary cooling zone group (8), in the roll gap of secondary cooling zone group (8), be installed with dummy bar (7), the head of dummy bar (7) inserts in crystallizer (5), support roller device (9) clamps the bottom of dummy bar (7),
Step 2, fill molten steel steel ladle (1) by long nozzle (2); Molten steel is injected in tundish (3); The molten steel induction heating apparatus (12) of tundish (3), to its heating, ensures that molten steel overheat is 10 ℃～50 ℃, and the time of staying of molten steel in tundish is within 10～15 minutes, to make inclusion floating in molten steel; By submersed nozzle (4), be injected in crystallizer (5), molten steel in crystallizer (5) cooling formation with the hollow bloom of liquid core;
Step 3, the molten steel in crystallizer (5) are during apart from the about 100mm in copper plate of crystallizer top, vibrating device (6) and support roller device (9) start simultaneously, vibrating device (6) vibrates by sine or non-sinusoidal cuve together with crystallizer (5), and its frequency is that 40～240 beats/min, amplitude are ± 2～5mm; Support roller device (9) holder drawing spindle blade (7) and hollow bloom move downward, casting speed: 0.1～0.2mm/min; When band liquid core hollow bloom is drawn out after crystallizer (5), enter secondary cooling zone group (8), secondary cooling zone group (8) plays a supportive role to hollow bloom and the hollow bloom of using crystallizer band liquid core solidifies completely; When hollow bloom arrives cutting machine (10), cutting machine (10) starts to cut hollow bloom, after having cut, hollow bloom and dummy bar (7) depart from, dummy bar (7) transports by oblique knockout system (11), cutting hollow bloom and transporting in the process of dummy bar (7), support roller device (9) is pushed down the downward throwing of hollow bloom always, after reaching scale, cutting machine (10) cuts hollow bloom again, after having cut, hollow bloom transports by oblique knockout system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210124034.2A CN102672121B (en) | 2012-04-25 | 2012-04-25 | Production method for continuous casting of vertical tube blanks |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210124034.2A CN102672121B (en) | 2012-04-25 | 2012-04-25 | Production method for continuous casting of vertical tube blanks |
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| CN102672121A CN102672121A (en) | 2012-09-19 |
| CN102672121B true CN102672121B (en) | 2014-11-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103567400A (en) * | 2013-10-30 | 2014-02-12 | 芜湖新兴铸管有限责任公司 | Continuous-casting slag-washing structure |
| CN105710325A (en) * | 2016-04-14 | 2016-06-29 | 北京北冶功能材料有限公司 | Vertical multi-strand vacuum high-temperature alloy continuous casting device and application method |
| CN110125348B (en) * | 2019-04-29 | 2021-02-26 | 中冶南方连铸技术工程有限责任公司 | Round billet continuous casting and drawing process method |
| CN110666115A (en) * | 2019-11-04 | 2020-01-10 | 中冶京诚工程技术有限公司 | Crystallizer and vertical hollow round billet continuous casting machine |
| CN114632917B (en) * | 2022-03-18 | 2023-09-08 | 重庆钢铁股份有限公司 | Method for online treatment of inner blank shell of crystallizer by continuous casting machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3150659A1 (en) * | 1981-02-11 | 1982-09-02 | Gerhard E. 44012 Avon Lake Ohio Schwarz | Manufacturing method and apparatus for the continuous casting of round hollow billets with a rolling mandrel and an internal rolling method |
| SU1214316A1 (en) * | 1984-07-27 | 1986-02-28 | Научно-Исследовательский И Проектно-Технологический Институт Машиностроения | Machine for continuous casting of hollow ingots |
| CN2887490Y (en) * | 2006-01-10 | 2007-04-11 | 李铁铎 | Vertical jointless steel tube hollow tube blank continuous casting machine |
| CN201308979Y (en) * | 2008-06-19 | 2009-09-16 | 沈阳东方钢铁有限公司 | Hollow round billet continuous caster |
| CN102303102A (en) * | 2011-09-30 | 2012-01-04 | 中冶南方工程技术有限公司 | Continuous casting process and continuous casting machine for extra-thick plate blank |
-
2012
- 2012-04-25 CN CN201210124034.2A patent/CN102672121B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3150659A1 (en) * | 1981-02-11 | 1982-09-02 | Gerhard E. 44012 Avon Lake Ohio Schwarz | Manufacturing method and apparatus for the continuous casting of round hollow billets with a rolling mandrel and an internal rolling method |
| SU1214316A1 (en) * | 1984-07-27 | 1986-02-28 | Научно-Исследовательский И Проектно-Технологический Институт Машиностроения | Machine for continuous casting of hollow ingots |
| CN2887490Y (en) * | 2006-01-10 | 2007-04-11 | 李铁铎 | Vertical jointless steel tube hollow tube blank continuous casting machine |
| CN201308979Y (en) * | 2008-06-19 | 2009-09-16 | 沈阳东方钢铁有限公司 | Hollow round billet continuous caster |
| CN102303102A (en) * | 2011-09-30 | 2012-01-04 | 中冶南方工程技术有限公司 | Continuous casting process and continuous casting machine for extra-thick plate blank |
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