CN106623886A - Continuous casting tundish stopper rod nitrogen-argon mixed blowing device - Google Patents
Continuous casting tundish stopper rod nitrogen-argon mixed blowing device Download PDFInfo
- Publication number
- CN106623886A CN106623886A CN201611055455.9A CN201611055455A CN106623886A CN 106623886 A CN106623886 A CN 106623886A CN 201611055455 A CN201611055455 A CN 201611055455A CN 106623886 A CN106623886 A CN 106623886A
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- CN
- China
- Prior art keywords
- nitrogen
- argon
- mixing
- control section
- flow
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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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
- B22D41/18—Stopper-rods therefor
- B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt
Abstract
The invention relates to a continuous casting tundish stopper rod nitrogen-argon mixed blowing device. The device comprises an argon control part, a nitrogen control part and a nitrogen and argon mixing part; the argon control part and the nitrogen control part communicate with each other and deliver mixed gas backwards through the nitrogen and argon mixing part; the argon control part sequentially comprises an argon pressure reducing value and an argon flow control valve; the nitrogen control part sequentially comprises a nitrogen pressure reducing value and a nitrogen flow control valve; the argon flow control valve and the nitrogen flow control valve are both in signal connection with a flow controller; the flow controller controls the flow proportion of the argon control part to range from 90% to 95% and correspondingly controls the flow proportion of the nitrogen control part to range from 5% to 10%; the nitrogen and argon mixing part sequentially comprises a first mixer, a mixing pressure reducing value, a mixing flow control valve and a second mixer; the first mixer receives gas of the argon control part and gas of the nitrogen control part simultaneously and maintains pressure balance, and the second mixer is arranged at the tail end of the nitrogen and argon mixing part.
Description
Technical field
The present invention relates to the blowning installation used in a kind of process for making, is a kind of continuous casting tundish stopper specifically
Nitrogen argon mixing blowning installation, belongs to steel-making blowning installation technical field.
Background technology
The stopper head dross occurred in conticaster casting process or the clogging for causing always perplex continuous casting working procedure
One difficult problem, the steel -passing amount that stopper head dross causes is reduced and not only affect production direct motion, and the knot that the fluctuation of steel -passing amount causes
Brilliant device liquid fluctuating is the one of the main reasons for causing steel products defect.Therefore, the dross or blockage problem of stopper head are solved
Tool is of great significance.
In order to prevent stopper head and mouth of a river adhesion alundum (Al2O3) blocking in casting process, typically at stopper head or the mouth of a river
In be blown into argon gas realization, but be blown into excessive argon gas, into crystallizer liquid fluctuating, argon gas will be caused to be inhaled by molten steel again
Receive and form bubble, slag and bubble defect can be caused.Stopper dross is solved it is desirable that increasing stopper head air-blowing quantity,
The slag and bubble defect for reducing strand wishes to reduce the argon gas amount of being blown into again, and this is the technology contradiction key point to be solved.
Therefore, how a kind of blocking that can be solved the problems, such as stopper head dross or cause is provided, can be avoided as far as possible again
Slag and bubble defect, are the technical barriers of this area urgent need solution.
The content of the invention
The technical problem to be solved in the invention is：A kind of continuous casting tundish stopper nitrogen argon mixing blowning installation is provided, is solved
Certainly stopper head dross or the problem of the blocking for causing, while avoiding slag and bubble defect as far as possible.
The present invention takes technical scheme below：
A kind of continuous casting tundish stopper nitrogen argon mixing blowning installation, including argon gas control section, nitrogen control section, nitrogen argon
Mixing portion；The argon gas control section is interconnected with nitrogen control section, and is conveyed backward by nitrogen argon mixing portion mixed
Close gas；The argon gas control section includes successively argon gas pressure-reducing valve, argon flow amount control valve；The nitrogen control section is successively
Including nitrogen pressure-reducing valve, nitrogen stream control valve；The argon flow amount controls valve, nitrogen stream control valve and flow controller
Signal connects；The flow controller control the argon gas control section flow accounting be 90%-95%, the corresponding nitrogen
The flow accounting of gas control section is 10%-5%；The nitrogen argon mixing portion successively include the first blender, mixing pressure-reducing valve,
Mixed flow control valve, the second blender；First blender receives argon gas control section and nitrogen control section simultaneously
Gas, and pressure balance is maintained, second blender is located at the end of nitrogen argon mixing portion.
Further, the argon gas control section also includes argon gas check valve, argon pressure table；The nitrogen control section
Also include nitrogen check valve, nitrogen pressure table.
Further, the nitrogen argon mixing portion also includes spinner flowmeter, mixing check valve, blend pressure table.
Further, the spinner flowmeter is located at mixing pressure-reducing valve and mixes between check valve, the blend pressure
Table is between mixing check valve and mixed flow control valve.
A kind of mixing air blowing method of above-mentioned continuous casting tundish stopper nitrogen argon mixing blowning installation, for different steel grades,
The flow accounting of different argon gas and nitrogen is chosen and controlled to different continuous casting process conditions, flow controller.
In order to prevent stopper head and mouth of a river adhesion alundum (Al2O3) blocking in casting process, typically at stopper head or the mouth of a river
In be blown into argon gas realization, but be blown into excessive argon gas, into crystallizer liquid fluctuating, argon gas will be caused to be inhaled by molten steel again
Receive and form bubble, cause slag and bubble defect.In order to solve problems, it is argon-mixed that the technical program provides nitrogen
Body device, with the nitrogen of a part argon gas is substituted, and because nitrogen is entered after molten steel, can progressively be absorbed by molten steel, therefore can be risen
To stopper and nozzle blocking is prevented, argon gas can be reduced again and enters the drawbacks of producing after crystallizer.
The beneficial effects of the present invention is：Former argon-blowing device is substituted there is provided nitrogen argon mixing blowning installation, for different
Stopper rod of tundish nitrogen flushing argon mixing blowing process standard is set up in steel grade, different continuous casting process conditions, optimization；Solve stopper head dross
Or the problem of the blocking for causing, while also avoiding slag and bubble defect, reach double effectses；Improve stopper and the mouth of a river is stifled
Plug phenomenon, improves tundish casting sequence, reduces crystallizer exception liquid fluctuating, reduces strand and is mingled with and air blister defect.
Description of the drawings
Fig. 1 is the flowage structure figure of continuous casting tundish stopper nitrogen argon mixing blowning installation of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is further described with specific embodiment.
Referring to Fig. 1, a kind of continuous casting tundish stopper nitrogen argon mixing blowning installation, including argon gas control section, nitrogen control
Partly, nitrogen argon mixing portion；The argon gas control section is interconnected with nitrogen control section, and by nitrogen argon mixing portion to
After convey mixed gas；The argon gas control section includes successively argon gas pressure-reducing valve, argon flow amount control valve；The nitrogen control
Part includes successively nitrogen pressure-reducing valve, nitrogen stream control valve；Argon flow amount control valve, nitrogen stream control valve with stream
Amount controller signal connects；It is 90%-95% that the flow controller controls the flow accounting of the argon gas control section, corresponding
The nitrogen control section flow accounting be 10%-5%；The nitrogen argon mixing portion includes successively the first blender, mixes
Close pressure-reducing valve, mixed flow control valve, the second blender；First blender receives argon gas control section and nitrogen control simultaneously
The gas of part processed, and pressure balance is maintained, second blender is located at the end of nitrogen argon mixing portion.
Referring to Fig. 1, the argon gas control section also includes argon gas check valve, argon pressure table；The nitrogen control section
Also include nitrogen check valve, nitrogen pressure table.
Referring to Fig. 1, the nitrogen argon mixing portion also includes spinner flowmeter, mixing check valve, blend pressure table.
Referring to Fig. 1, located at mixing pressure-reducing valve and mixing between check valve, the blend pressure table sets the spinner flowmeter
Between mixing check valve and mixed flow control valve.
A kind of mixing air blowing method of above-mentioned continuous casting tundish stopper nitrogen argon mixing blowning installation, for different steel grades,
The flow accounting of different argon gas and nitrogen is chosen and controlled to different continuous casting process conditions, flow controller.
Self-developing nitrogen argon mixing air blowing controller of the present invention, completes live nitrogen argon mixture gas plant modification；For
Stopper rod of tundish nitrogen flushing argon mixing blowing process standard is set up in different steel grades, different continuous casting process conditions, optimization；By adopting
The argon-mixed body technology of stopper nitrogen flushing, improves stopper and nozzle clogging phenomenon, and tundish casting sequence is from 4.2 stoves/only bring up to
4.8 stoves/only；Reduce strand be mingled with and air blister defect, hot rolling be mingled with bubble block drop to 3.6% from 4.05%；Reach
Product objective, cost objective and expected benefit.
It is more than the preferred embodiments of the present invention, one of ordinary skill in the art can on this basis carry out various changes
Change, these convert to be considered as and are equal to the scope of protection of present invention.
Claims (5)
1. a kind of continuous casting tundish stopper nitrogen argon mixing blowning installation, it is characterised in that：
Including argon gas control section, nitrogen control section, nitrogen argon mixing portion；The argon gas control section and nitrogen control section
It is interconnected, and mixed gas is conveyed backward by nitrogen argon mixing portion；
The argon gas control section includes successively argon gas pressure-reducing valve, argon flow amount control valve；Wrap successively the nitrogen control section
Include nitrogen pressure-reducing valve, nitrogen stream control valve；The argon flow amount control valve, nitrogen stream control valve are believed with flow controller
Number connection；The flow controller control the argon gas control section flow accounting be 90%-95%, the corresponding nitrogen
The flow accounting of control section is 10%-5%；
The nitrogen argon mixing portion includes successively the first blender, mixing pressure-reducing valve, mixed flow control valve, the second blender；
First blender receives the gas of argon gas control section and nitrogen control section simultaneously, and maintains pressure balance, and described the
Two blenders are located at the end of nitrogen argon mixing portion.
2. continuous casting tundish stopper nitrogen argon mixing blowning installation as claimed in claim 1, it is characterised in that：The argon gas control
Part also includes argon gas check valve, argon pressure table；The nitrogen control section also includes nitrogen check valve, nitrogen pressure table.
3. continuous casting tundish stopper nitrogen argon mixing blowning installation as claimed in claim 1, it is characterised in that：The nitrogen argon mixing
Part also includes spinner flowmeter, mixing check valve, blend pressure table.
4. continuous casting tundish stopper nitrogen argon mixing blowning installation as claimed in claim 3, it is characterised in that：The spinner
, located at mixing pressure-reducing valve and mixing between check valve, the blend pressure table is located at mixing check valve and mixed flow control valve for meter
Between.
5. a kind of mixing air blowing method of continuous casting tundish stopper nitrogen argon mixing blowning installation as claimed in claim 1, it is special
Levy and be：For different steel grades, different argon gas and nitrogen are chosen and controlled to different continuous casting process conditions, flow controller
Flow accounting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611055455.9A CN106623886A (en) | 2016-11-25 | 2016-11-25 | Continuous casting tundish stopper rod nitrogen-argon mixed blowing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611055455.9A CN106623886A (en) | 2016-11-25 | 2016-11-25 | Continuous casting tundish stopper rod nitrogen-argon mixed blowing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106623886A true CN106623886A (en) | 2017-05-10 |
Family
ID=58812040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611055455.9A Pending CN106623886A (en) | 2016-11-25 | 2016-11-25 | Continuous casting tundish stopper rod nitrogen-argon mixed blowing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106623886A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6238747A (en) * | 1985-08-12 | 1987-02-19 | Kawasaki Steel Corp | Continuous casting method for slab for thin cold rolled sheet of dead soft steel without blister defect in annealing stage |
| CN102600759A (en) * | 2012-03-23 | 2012-07-25 | 刘树伟 | Nitrogen/chlorine (argon/chlorine) mixing and proportioning system and operation method thereof |
| CN103184315A (en) * | 2011-12-30 | 2013-07-03 | 斗山重工业株式会社 | Porous plug, device and method for manufacturing high nitrogen steel using same |
| CN203587531U (en) * | 2013-09-18 | 2014-05-07 | 苏州菲尼克斯质检仪器有限公司 | Paramagnetic oxygen analyzer |
| CN204583104U (en) * | 2015-04-02 | 2015-08-26 | 福建省长汀金龙稀土有限公司 | A kind of hydrogen nitrogen proportion-controllable hybrid system |
-
2016
- 2016-11-25 CN CN201611055455.9A patent/CN106623886A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6238747A (en) * | 1985-08-12 | 1987-02-19 | Kawasaki Steel Corp | Continuous casting method for slab for thin cold rolled sheet of dead soft steel without blister defect in annealing stage |
| CN103184315A (en) * | 2011-12-30 | 2013-07-03 | 斗山重工业株式会社 | Porous plug, device and method for manufacturing high nitrogen steel using same |
| CN102600759A (en) * | 2012-03-23 | 2012-07-25 | 刘树伟 | Nitrogen/chlorine (argon/chlorine) mixing and proportioning system and operation method thereof |
| CN203587531U (en) * | 2013-09-18 | 2014-05-07 | 苏州菲尼克斯质检仪器有限公司 | Paramagnetic oxygen analyzer |
| CN204583104U (en) * | 2015-04-02 | 2015-08-26 | 福建省长汀金龙稀土有限公司 | A kind of hydrogen nitrogen proportion-controllable hybrid system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170510 |