EP1250972A2 - Verfahren und Vorrichtung zum Stranggiessen von Brammen, insbesondere von Dünnbrammen - Google Patents
Verfahren und Vorrichtung zum Stranggiessen von Brammen, insbesondere von Dünnbrammen Download PDFInfo
- Publication number
- EP1250972A2 EP1250972A2 EP02006338A EP02006338A EP1250972A2 EP 1250972 A2 EP1250972 A2 EP 1250972A2 EP 02006338 A EP02006338 A EP 02006338A EP 02006338 A EP02006338 A EP 02006338A EP 1250972 A2 EP1250972 A2 EP 1250972A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- amplitude
- walls
- ultrasonic
- melt
- Prior art date
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000009749 continuous casting Methods 0.000 title claims description 7
- 238000005266 casting Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 239000000155 melt Substances 0.000 claims abstract description 11
- 238000002604 ultrasonography Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims description 2
- 230000007704 transition Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 5
- 230000005499 meniscus Effects 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 206010001497 Agitation Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/053—Means for oscillating the moulds
Definitions
- the invention relates to a method for the continuous casting of slabs, in particular of thin slabs made of steel using a continuous mold with the inside wall molten mold walls covered with cooling liquid are flowed through or can be cooled in contact with coolers.
- the molten steel occurs particularly in the area of the bath level the mold with high heat flow density very high temperature stresses Mold walls that lead to their disadvantageous changes and thus shorten the reworking intervals of the molds Surface quality of the casting strand is impaired.
- the level of the temperature stress on the mold walls is essentially of functional parameters such as casting speed, copper wall thickness before coolant, possible bath level fluctuations, steel quality, mold wall quality and, in a special way, the nature of a layer of mold powder dependent.
- Document EP 0 807 477 A1 describes a system for continuous Casting metal strands from molten metal using a mold, that of side walls with cooling channels adjoining outer wall areas is surrounded.
- the outside of the mold walls have a variety of electromagnetic Devices on the mold walls independently, separately as well are arranged differently to the casting direction and to produce pulsating electromagnetic fields to the axis of the mold and along the length of the belt wandering, being excited.
- current pulses from the electromagnets are in the strength up to 100 KA are provided to the pulsating electromagnetic Generate field that interacts with the melt.
- the document EP 0 807 478 A1 describes a continuous mold for casting Strands with different cross-sectional shapes, the mold of the plate type or can be tubular and has cooled side walls, at least an elongated peripheral area with electrically insulated elements as well form with two insulated ends each. On the side walls are electromagnetic Waves generated, at least with the frozen Strand shell should interact.
- EP 0 807 475 A1 describes a method for generating transverse vibrations in the walls of a continuous mold for slabs using pulsation a liquid.
- the mold sometimes has one or more peripheral ones Areas where cooling fluid circulates around the side walls of the mold and the cooling circuit with transition channels in direct contact with one or several of the side walls.
- the cooling medium With the help of at least one pump with one Supply and discharge line in connection with an outlet, the cooling medium in Circulation offset around the side walls of the mold.
- the pressure of the coolant and the pulsation in the pressure curve is dependent on the desired transverse vibration a side wall.
- EP 0 698 434 A1 describes a continuous caster for casting thin slabs made of steel with an electromagnetic brake device for through a dip tube poured into the mold melt.
- the braking device exists of one coil each arranged on the broad sides of the mold with a ferromagnetic Core and a yoke enclosing the mold.
- To create a simple, inexpensive and definable braking device are the ferromagnetic cores each consisting of a main core and a casting strand side Partial core formed, with different partial cores for adaptation of the magnetic field can alternatively be used in changing casting conditions.
- the document WO 99/02 286 describes an electromagnetic stirring method for a mold of the plate type for the continuous casting of blooms, plates or Round material, using means for producing a magnetic Field in interaction with the molten metal within the mold. in this connection is intended to circulate electrical current directly along the side walls of the Chill mold can be built. There should also be electromagnetic forces across Pouring direction are generated to separate the strand shell of the solidifying Cause metal from the side walls of the mold and thereby the friction between the strand shell and the side wall.
- the object of the invention based on a method of the type mentioned in the preamble of claim 1 to perfect and improve it so that the heat transfer between the melt and the mold walls, especially in the area of Bath level of the melt is significantly reduced, so that special steels, such as peritectic steels, can be cast easily.
- Farther is intended with the invention of the coefficient of friction between the strand shell and the Mold walls can be significantly reduced, so that the rework cycles for the Mold walls increased and thus the availability of the mold significantly is extended.
- the process for continuously casting slabs provides a solution to the problem, in particular of thin slabs of steel, according to the preamble of claim 1 before that the mold walls using ultrasonic sensors in Ultrasonic vibrations with a comparatively high frequency and adapted amplitude are offset such that the heat transfer between the melt and Mold wall and the coefficient of friction between the strand shell and the mold wall is reduced.
- This makes both the thermal and mechanical high stress on the mold walls, especially in the area of the bathroom mirror, of the so-called meniscus, significantly reduced.
- the wear of the mold plates in this area decreases and the availability of the mold is in increased in the same way.
- the proposed invention the casting of critical steel qualities, e.g. peritectic steels, possible.
- the vibration parameters frequency and amplitude can be different Individual ultrasound transmitters based on observed operating results can be set. This makes sense because of the vibration parameters of a number of interacting influencing factors such as type the mold, thickness and material of the mold walls, arrangement and size of the Coolant channels in the mold walls etc. depend and therefore on a case by case basis can be very different.
- an embodiment of the method according to the invention provides that Ultrasonic waves are emitted in the direction perpendicular to a mold wall against this become.
- ultrasonic sensors on the outside of Mold walls at the level of the liquid level or the meniscus, or just below be arranged in the same, so that in the particularly thermal and mechanical highly stressed area of the mold walls in particular be intensively protected.
- the experience of Casting technician are introduced on site in the inventive method.
- Ultrasound transmitters can be arranged on the wide and narrow sides of the mold.
- They can also be arranged in rows one above the other or one above the other, such that that with it all possible essential areas of the mold plates with ultrasonic waves be sonicated for differences in their training and adherence to avoid from the outset.
- the mold walls 13, 13 'and preferably in at least two rows with one another Height of the bath level or meniscus 11 arranged ultrasound transmitter 6, 6 ', and in such a way that its ultrasonic waves 7, 7 'hit the walls 13, 13' cut the mold 5 at right angles and in the area of Bath level 11 penetrate into the melt 9 or into the strand shell 8. there reduce the contact between the melt and the mold wall 13, 13 'in the casting area 11 or between the strand shell 8 and the mold wall 13, 13 'and lead to a significant reduction in the heat flow density as well the friction between the mold walls and the melt 9.
- the invention is both economical due to higher availability the mold walls, as well as from an operational point of view because of the possibility of easy casting of so-called critical steels such as peritectic Steels enrich the continuous casting technology.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
- 1
- Verteiler
- 2
- Schmelzbad
- 3
- Regelorgan
- 4
- Tauchgießrohr
- 5
- Kokille
- 6
- Ultraschallgeber
- 7
- Ultraschallwellen
- 8
- Strangschale
- 9
- flüssiger Kern mit Sumpfspitze
- 10
- Gießstrang
- 11
- Meniskus in der Kokille
- 12
- Sumpfspitze
- 13
- Kokillenwände
Claims (10)
- Verfahren zum Stranggießen von Brammen, insbesondere von Dünnbrammen aus Stahl, unter Verwendung einer Durchlaufkokille (5) mit innenwandseitig mit Schmelze (2) beaufschlagten Kokillenwänden (13, 13'), die von Kühlflüssigkeit durchflossen sind bzw. im Kontakt mit Kühlkästen kühlbar sind,
dadurch gekennzeichnet, dass die Kokillenwände (13, 13') unter Verwendung von Ultraschallgebern (6, 6') in Ultraschallvibrationen mit vergleichsweise hoher Frequenz und angepaßter Amplitude derart versetzt werden, dass der Wärmeübergang zwischen Schmelze und Kokillenwand sowie der Reibungskoeffizient zwischen Strangschale und Kokillenwand reduziert wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass Frequenz und Amplitude nach Maßgabe des Betriebsergebnisses eingestellt werden. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Schwingungsparameter Frequenz und Amplitude unterschiedlicher Ultraschallgeber (6, 6') nach Maßgabe von beobachteten Betriebsergebnissen individuell eingestellt werden. - Verfahren nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass Ultraschallwellen (7, 7') in Richtung senkrecht zur Kokillenwand (13, 13') gegen diese emittiert werden. - Verfahren nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass die Ultraschallgeb_er unter einem Winkel bis zu 45° in Gießrichtung angeordnet sind. - Verfahren nach einem oder mehreren der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass Ultraschallgeber (6 , 6') an Außenseiten der Kokillenwände (13, 13') in Höhe des Badspiegels (11), oder dicht unterhalb desselben angeordnet werden. - Verfahren nach einem oder mehreren der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass Ultraschallgeber (6, 6') an Breit- und Schmalseiten einer Kokille (5) angeordnet werden. - Verfahren nach einem oder mehreren der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass Ultraschallgeber (6, 6') in Reihen unter- bzw. übereinander angeordnet werden. - Verfahren nach einem oder mehreren der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass die Schwingungsamplitude eines Schallgebers (6) mittels Einstellung der Stromstärke angepaßt wird. - Vorrichtung zur Durchführung des Verfahrens nach einem
der Ansprüche 1 bis 9,
gekennzeichnet durch
die Anordnung wenigstens eines Ultraschallgebers (6, 6') zumindest im Badspiegelbereich (11) an den Kokillenwänden (13, 13') einer Durchlaufkokille (5).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001119355 DE10119355A1 (de) | 2001-04-20 | 2001-04-20 | Verfahren und Vorrichtung zum Stranggießen von Brammen, insbesondere von Dünnbrammen |
DE10119355 | 2001-04-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1250972A2 true EP1250972A2 (de) | 2002-10-23 |
EP1250972A3 EP1250972A3 (de) | 2004-09-22 |
Family
ID=7682079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02006338A Withdrawn EP1250972A3 (de) | 2001-04-20 | 2002-03-21 | Verfahren und Vorrichtung zum Stranggiessen von Brammen, insbesondere von Dünnbrammen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1250972A3 (de) |
DE (1) | DE10119355A1 (de) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9481031B2 (en) | 2015-02-09 | 2016-11-01 | Hans Tech, Llc | Ultrasonic grain refining |
US10022786B2 (en) | 2015-09-10 | 2018-07-17 | Southwire Company | Ultrasonic grain refining |
CN109317629A (zh) * | 2018-11-22 | 2019-02-12 | 东北大学 | 一种利用功率超声控制连铸坯质量的系统及方法 |
US10233515B1 (en) | 2015-08-14 | 2019-03-19 | Southwire Company, Llc | Metal treatment station for use with ultrasonic degassing system |
US10316387B2 (en) | 2013-11-18 | 2019-06-11 | Southwire Company, Llc | Ultrasonic probes with gas outlets for degassing of molten metals |
US10640846B2 (en) | 2010-04-09 | 2020-05-05 | Southwire Company, Llc | Ultrasonic degassing of molten metals |
CN112091191A (zh) * | 2020-11-11 | 2020-12-18 | 西安斯瑞先进铜合金科技有限公司 | 一种非真空下引半连铸铜锰合金扁锭的制备方法及其装置 |
CN112846120A (zh) * | 2021-01-06 | 2021-05-28 | 鞍钢股份有限公司 | 一种细化高锰钢连铸坯凝固组织的装置及方法 |
CN113102733A (zh) * | 2021-03-30 | 2021-07-13 | 西北工业大学 | 多向耦合的壁面振动三维超声金属凝固装置与方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2378367T3 (es) | 2008-03-05 | 2012-04-11 | Southwire Company | Sonda de ultrasonidos con capa protectora de niobio |
US8652397B2 (en) | 2010-04-09 | 2014-02-18 | Southwire Company | Ultrasonic device with integrated gas delivery system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59197366A (ja) * | 1983-04-26 | 1984-11-08 | Nippon Steel Corp | 連続鋳造鋳型の振幅制御方法 |
JPS6099453A (ja) * | 1983-11-04 | 1985-06-03 | Sumitomo Metal Ind Ltd | 連続鋳造用超音波振動鋳型 |
JPS6313653A (ja) * | 1986-07-04 | 1988-01-20 | Sumitomo Metal Ind Ltd | 鋼の連続鋳造方法 |
JPS63140744A (ja) * | 1986-12-02 | 1988-06-13 | Sumitomo Metal Ind Ltd | 連続鋳造方法 |
EP0305930A1 (de) * | 1987-08-29 | 1989-03-08 | Nippon Steel Corporation | Stranggusskokille und Verfahren zu ihrer Hochfrequenz-Oszillierung |
US5355935A (en) * | 1989-06-12 | 1994-10-18 | Institut De Recherches De La Siderurgie Francaise (Irsid) | Method and device for vibrating an ingot mould for the continuous casting of metals |
-
2001
- 2001-04-20 DE DE2001119355 patent/DE10119355A1/de not_active Withdrawn
-
2002
- 2002-03-21 EP EP02006338A patent/EP1250972A3/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59197366A (ja) * | 1983-04-26 | 1984-11-08 | Nippon Steel Corp | 連続鋳造鋳型の振幅制御方法 |
JPS6099453A (ja) * | 1983-11-04 | 1985-06-03 | Sumitomo Metal Ind Ltd | 連続鋳造用超音波振動鋳型 |
JPS6313653A (ja) * | 1986-07-04 | 1988-01-20 | Sumitomo Metal Ind Ltd | 鋼の連続鋳造方法 |
JPS63140744A (ja) * | 1986-12-02 | 1988-06-13 | Sumitomo Metal Ind Ltd | 連続鋳造方法 |
EP0305930A1 (de) * | 1987-08-29 | 1989-03-08 | Nippon Steel Corporation | Stranggusskokille und Verfahren zu ihrer Hochfrequenz-Oszillierung |
US5355935A (en) * | 1989-06-12 | 1994-10-18 | Institut De Recherches De La Siderurgie Francaise (Irsid) | Method and device for vibrating an ingot mould for the continuous casting of metals |
Non-Patent Citations (4)
Title |
---|
PATENT ABSTRACTS OF JAPAN Bd. 0090, Nr. 63 (M-365), 20. März 1985 (1985-03-20) & JP 59 197366 A (SHIN NIPPON SEITETSU KK), 8. November 1984 (1984-11-08) * |
PATENT ABSTRACTS OF JAPAN Bd. 0092, Nr. 45 (M-418), 2. Oktober 1985 (1985-10-02) & JP 60 099453 A (SUMITOMO KINZOKU KOGYO KK), 3. Juni 1985 (1985-06-03) * |
PATENT ABSTRACTS OF JAPAN Bd. 0122, Nr. 08 (M-709), 15. Juni 1988 (1988-06-15) & JP 63 013653 A (SUMITOMO METAL IND LTD), 20. Januar 1988 (1988-01-20) * |
PATENT ABSTRACTS OF JAPAN Bd. 0123, Nr. 92 (M-755), 19. Oktober 1988 (1988-10-19) & JP 63 140744 A (SUMITOMO METAL IND LTD), 13. Juni 1988 (1988-06-13) * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10640846B2 (en) | 2010-04-09 | 2020-05-05 | Southwire Company, Llc | Ultrasonic degassing of molten metals |
US10316387B2 (en) | 2013-11-18 | 2019-06-11 | Southwire Company, Llc | Ultrasonic probes with gas outlets for degassing of molten metals |
US10441999B2 (en) | 2015-02-09 | 2019-10-15 | Hans Tech, Llc | Ultrasonic grain refining |
US9481031B2 (en) | 2015-02-09 | 2016-11-01 | Hans Tech, Llc | Ultrasonic grain refining |
US10233515B1 (en) | 2015-08-14 | 2019-03-19 | Southwire Company, Llc | Metal treatment station for use with ultrasonic degassing system |
US10639707B2 (en) | 2015-09-10 | 2020-05-05 | Southwire Company, Llc | Ultrasonic grain refining and degassing procedures and systems for metal casting |
US10022786B2 (en) | 2015-09-10 | 2018-07-17 | Southwire Company | Ultrasonic grain refining |
CN109317629A (zh) * | 2018-11-22 | 2019-02-12 | 东北大学 | 一种利用功率超声控制连铸坯质量的系统及方法 |
CN112091191A (zh) * | 2020-11-11 | 2020-12-18 | 西安斯瑞先进铜合金科技有限公司 | 一种非真空下引半连铸铜锰合金扁锭的制备方法及其装置 |
CN112091191B (zh) * | 2020-11-11 | 2021-02-09 | 西安斯瑞先进铜合金科技有限公司 | 一种非真空下引半连铸铜锰合金扁锭的制备方法及其装置 |
CN112846120A (zh) * | 2021-01-06 | 2021-05-28 | 鞍钢股份有限公司 | 一种细化高锰钢连铸坯凝固组织的装置及方法 |
CN112846120B (zh) * | 2021-01-06 | 2022-08-16 | 鞍钢股份有限公司 | 一种细化高锰钢连铸坯凝固组织的装置及方法 |
CN113102733A (zh) * | 2021-03-30 | 2021-07-13 | 西北工业大学 | 多向耦合的壁面振动三维超声金属凝固装置与方法 |
CN113102733B (zh) * | 2021-03-30 | 2022-03-01 | 西北工业大学 | 多向耦合的壁面振动三维超声金属凝固装置与方法 |
Also Published As
Publication number | Publication date |
---|---|
DE10119355A1 (de) | 2002-10-24 |
EP1250972A3 (de) | 2004-09-22 |
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