CN103302260A - Molten steel argon blowing method used at steel-making continuous casting workstation - Google Patents
Molten steel argon blowing method used at steel-making continuous casting workstation Download PDFInfo
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- CN103302260A CN103302260A CN2013102362303A CN201310236230A CN103302260A CN 103302260 A CN103302260 A CN 103302260A CN 2013102362303 A CN2013102362303 A CN 2013102362303A CN 201310236230 A CN201310236230 A CN 201310236230A CN 103302260 A CN103302260 A CN 103302260A
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Abstract
The invention relates to a molten steel argon blowing method used at a steel-making continuous casting workstation. The molten steel argon blowing method used at the steel-making continuous casting workstation is characterized by comprising the following steps: after a steel ladle arrives at an intermediate ladle turret, blowing argon into molten steel in a steel ladle on the other side of the turret when a steel ladle on one side of the turret is cast, wherein the flow of the argon blown into the steel ladle is 30-95 Nl/min, and the argon blowing duration time is 5-10 mines; and 5 mines before stopping casting the steel ladle on one side of the turret, stopping blowing argon into the molten steel of the steel ladle. The molten steel argon blowing method used at the steel-making continuous casting workstation has the advantages as follows: when the molten steel on one side of the turret is cast, soft argon blowing operation is performed on the molten steel on the other side of the turret, so that the waiting time of the molten steel at the turret is used, and the quality of the molten steel is improved; and under the same condition, the oxygen content of the molten steel treated by the soft argon blowing operation at the steel ladle turret at the continuous casting workstation is 2-3ppm (1ppm refers to the mass ratio of solute to solution of 1*10 to the power of -6) lower than that of the molten steel which is not treated by the soft argon blowing operation at the continuous casting workstation.
Description
Technical field
The present invention relates to a kind of method of steel-making continuous casting station molten steel Argon, belong to the field of steel-making that metallurgical industry is produced.
Background technology
In the steelmaking production in metallurgical industry process, being blown into argon gas in the molten steel is an important step, and argon gas is concerning molten steel, and is extremely important, is known as " soft gold ".Argon gas has the very important effect that promotes that liquid steel temperature is even, the promotion molten steel composition is even, is conducive to inclusion floating in the liquid steel refining process.But molten steel is blown into argon gas generally all to carry out at the liquid steel refining station, and owing to being subject to the restriction of rhythm of production, is blown into the limited time of argon gas.
" refining process is on the impact of high-carbon-chromium bearing steel quality " delivered according to " China metallurgical " the 10th phase (October) in 2009 Liu Xinghong, Jiangyin emerging clear special steel Co., Ltd steel mill is when producing high-carbon-chromium bearing steel, also in refining process, carry out the Argon operation, to guarantee the quality of molten steel.
" furnace outer refining technology that clean steel is produced " delivered according to " this steel technology " people such as the 3rd phase Huang Tao in 2009, this steel steel-making refining process argon gas control: in whole refining process, by bag end Argon in the molten bath, produce micro-bubble, the emersion molten steel enters slag blanket to make tiny field trash float on Argon Bubble together, and weak stirring of little argon flow amount is conducive to removal of inclusions.
According to the people such as " Sichuan metallurgical " the 4th phase (August) in 2008 Yi Xingjun deliver " climb into the test of steel 150 billet production low carbon low silicon steel smelting continuous casting process ", this factory controls Argon intensity in refining process, the clean blowing argon gas time was more than or equal to 5min after refining finished.
According to the people such as " Tianjin metallurgical " the 4th phase in 2006 (total the 135th phase) Gao Shurong deliver " the putting into practice of Development of Grade N 80 Non-quenching ﹠ Tempering Casing Steel for Converter ", the steel mill VD of Tianjin iron company refining furnace is broken to feed CaSi line and soft blow argon after empty more than or equal to 5min.
This shows, the soft blow argon gas generally carries out at the refining station.
Baogang Steel Plant is in order further to improve steel quality, take full advantage of the stand-by period of molten steel on ladle turret, developed the molten steel soft blow argon gas method (referring to that the argon flow amount that is blown into molten steel is no more than 100 Nl/min, a kind of process that is unlikely to cause molten steel acutely to seethe molten steel is contacted with air) of continuous casting station.
Oxygen content in steel is the important symbol of weighing steel quality, and the oxygen content amount of steel is lower, and the Control and Inclusion Removal level of molten steel is better, and the quality of steel is better, therefore should make great efforts to reduce the oxygen content in the molten steel.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can take full advantage of the stand-by period of molten steel on ladle turret and carry out the method for the steel-making continuous casting station molten steel Argon of Argon.
Technical solution of the present invention is as follows:
After steel ladle arrives the tundish panoramic table, utilize the time that Baogang's water is being poured into a mould on panoramic table one side, molten steel in the panoramic table opposite side ladle is blown into the operation of argon gas, the argon flow amount that is blown into ladle is: 30-95 Nl/min, being blown into the lasting time of argon gas is: 5-10min, 5min before Baogang's water stops watering on panoramic table one side, this ladle molten steel stops to be blown into argon gas.
The invention has the advantages that when the molten steel of panoramic table one side during in cast, the molten steel of panoramic table opposite side is carried out the operation of soft blow argon, both utilized the stand-by period of molten steel at panoramic table, improved again the quality of molten steel; Under similarity condition, the molten steel of process continuous casting station ladle turret soft blow argon gas does not refer to that than reducing 2-3ppm(1ppm through oxygen content in the molten steel of continuous casting station soft blow argon gas solute and solution quality ratio are 1 * 10
-6).
The specific embodiment
Embodiment 1: the argon flow amount that is blown into ladle is: 30 Nl/min are blown into the time that argon gas continues and are: 5min, this ladle molten steel of 5min stopped to be blown into argon gas before Baogang's water stopped watering on panoramic table one side.
Under similarity condition, the molten steel of process continuous casting station ladle turret soft blow argon gas is than reducing 2.0ppm through oxygen content in the molten steel of continuous casting station soft blow argon gas.
Embodiment 2: the argon flow amount that is blown into ladle is: 45 Nl/min are blown into the time that argon gas continues and are: 7min, this ladle molten steel of 5min stopped to be blown into argon gas before Baogang's water stopped watering on panoramic table one side.
Under similarity condition, the molten steel of process continuous casting station ladle turret soft blow argon gas is than reducing 2.2ppm through oxygen content in the molten steel of continuous casting station soft blow argon gas.
Embodiment 3: the argon flow amount that is blown into ladle is: 80 Nl/min are blown into the time that argon gas continues and are: 8min, this ladle molten steel of 5min stopped to be blown into argon gas before Baogang's water stopped watering on panoramic table one side.
Under similarity condition, the molten steel of process continuous casting station ladle turret soft blow argon gas is than reducing 2.7ppm through oxygen content in the molten steel of continuous casting station soft blow argon gas.
Embodiment 4: the argon flow amount that is blown into ladle is: 95 Nl/min are blown into the time that argon gas continues and are: 10min, this ladle molten steel of 5min stopped to be blown into argon gas before Baogang's water stopped watering on panoramic table one side.
Under similarity condition, the molten steel of process continuous casting station ladle turret soft blow argon gas is than reducing 3ppm through oxygen content in the molten steel of continuous casting station soft blow argon gas.
Claims (1)
1. the present invention relates to a kind of method of steel-making continuous casting station molten steel Argon, it is characterized in that: after steel ladle arrives the tundish panoramic table, utilize the time that Baogang's water is being poured into a mould on panoramic table one side, molten steel in the panoramic table opposite side ladle is blown into the operation of argon gas, the argon flow amount that is blown into ladle is: 30-95 Nl/min, being blown into the lasting time of argon gas is: 5-10min, and 5min before Baogang's water stops watering on panoramic table one side, this ladle molten steel stops to be blown into argon gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102362303A CN103302260A (en) | 2013-06-14 | 2013-06-14 | Molten steel argon blowing method used at steel-making continuous casting workstation |
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| CN2013102362303A CN103302260A (en) | 2013-06-14 | 2013-06-14 | Molten steel argon blowing method used at steel-making continuous casting workstation |
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| CN103302260A true CN103302260A (en) | 2013-09-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108817337A (en) * | 2018-07-11 | 2018-11-16 | 德龙钢铁有限公司 | Ladle turret argon jetting method and ladle argon-blown revolving platform under continuous casting mode |
| CN111107953A (en) * | 2017-08-08 | 2020-05-05 | 株式会社Posco | Casting apparatus and casting method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09300051A (en) * | 1996-05-16 | 1997-11-25 | Nippon Steel Corp | Method for cleaning molten steel in tundish |
| JPH09314290A (en) * | 1996-05-28 | 1997-12-09 | Nippon Steel Corp | Continuous casting method |
| CN101660022A (en) * | 2009-09-12 | 2010-03-03 | 山西太钢不锈钢股份有限公司 | Method for improving steel cleanness of stainless steel |
| CN102211155A (en) * | 2011-06-01 | 2011-10-12 | 武汉钢铁(集团)公司 | Calcium treatment method of low-carbon low silicon aluminium killed steels under CSP (Cast Steel Plate) condition |
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2013
- 2013-06-14 CN CN2013102362303A patent/CN103302260A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09300051A (en) * | 1996-05-16 | 1997-11-25 | Nippon Steel Corp | Method for cleaning molten steel in tundish |
| JPH09314290A (en) * | 1996-05-28 | 1997-12-09 | Nippon Steel Corp | Continuous casting method |
| CN101660022A (en) * | 2009-09-12 | 2010-03-03 | 山西太钢不锈钢股份有限公司 | Method for improving steel cleanness of stainless steel |
| CN102211155A (en) * | 2011-06-01 | 2011-10-12 | 武汉钢铁(集团)公司 | Calcium treatment method of low-carbon low silicon aluminium killed steels under CSP (Cast Steel Plate) condition |
Non-Patent Citations (1)
| Title |
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| 朱苗勇等: "《现代冶金工艺学—钢铁冶金卷》", 30 June 2011, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111107953A (en) * | 2017-08-08 | 2020-05-05 | 株式会社Posco | Casting apparatus and casting method |
| CN108817337A (en) * | 2018-07-11 | 2018-11-16 | 德龙钢铁有限公司 | Ladle turret argon jetting method and ladle argon-blown revolving platform under continuous casting mode |
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Application publication date: 20130918 |