EP0852166A2 - Tauchgiessrohr für Giessformen in Stranggiessanlagen - Google Patents

Tauchgiessrohr für Giessformen in Stranggiessanlagen Download PDF

Info

Publication number: EP0852166A2
Authority: EP; European Patent Office
Prior art keywords: discharge nozzle; outlets; main body; outflow duct; nozzle according
Prior art date: 1996-12-16
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.): Granted

Application number

EP97830676A

Other languages

English (en)

French (fr)

Other versions

EP0852166B1 (de

EP0852166A3 (de

Inventor

Michele De Santis

Alessandro Ferretti

Leonardo Liberati

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Rina Consulting Centro Sviluppo Materiali SpA

Original Assignee

Centro Sviluppo Materiali SpA

Priority date (The priority date 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 date listed.)

1996-12-16

Filing date

1997-12-16

Publication date

1998-07-08

1997-12-16 Application filed by Centro Sviluppo Materiali SpA filed Critical Centro Sviluppo Materiali SpA

1998-07-08 Publication of EP0852166A2 publication Critical patent/EP0852166A2/de

1998-07-22 Publication of EP0852166A3 publication Critical patent/EP0852166A3/de

2002-07-24 Application granted granted Critical

2002-07-24 Publication of EP0852166B1 publication Critical patent/EP0852166B1/de

2017-12-16 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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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
- B22D41/50—Pouring-nozzles

Definitions

the present invention relates to a discharge nozzle for moulds in continuous casting machines and, more specifically, to a discharge nozzle of molten metal having directed outlets for moulds in continuous casting machines.
One known method is that of using a device external to the old, known as an electromagnetic brake which, by means of an electromagnetic field induced in the bath, influences the movement of the metal, thus reducing stirring in the bath.
the disadvantage of a device of this kind is that it involves extremely high costs and, like all external devices in a system, the additional need for maintenance and control.
the object of the present invention is to solve the above mentioned problems by providing a discharge nozzle having its outlets arranged in such a way as to induce a damping effect on the energy of the jet of metal passing through said outlets, and such that said damping effect increases proportionally to the increase of flow rate, thus decreasing stirring in the bath of the old.
a further object of the present invention is to provide a discharge nozzle for moulds that is of simple construction, provides a high level of reliability and in which only normal maintenance operations are required.
a discharge nozzle for moulds in continuous casting machines comprises:
the discharge nozzle has a body 1 with a substantially cylindrical shape, within which an outflow duct 2 for the molten metal is formed.
said duct 2 has a steady cross-section until a predetermined length, at which point two outlets 3 are formed (only one of them is shown in the figure). From that length onwards, the section of the duct 2 decreases and extends for a further determined distance, at which point, in a similar manner to that above, two outlets 4 are formed (only one of them is shown in the figure), which are larger than the two openings 3.
the openings 3 and 4 are arranged in an horizontal direction, that is to say at right angles to the longitudinal direction of the discharge nozzle.
the discharge nozzle has a body 5 with a substantially cylindrical section, inside which an outflow duct 6 is formed.
the duct 6 has a thread 7 for the engaging with the feeder duct of the discharge nozzle (not shown in the figure) in a known manner.
the duct 6 is frustoconical along its length, that is to say it has a cross-section that decreases as said duct advances.
outlets 8 are formed, both of same size and arranged in a diametrically opposite position. Said outlets 8 are directed upwards so that their longitudinal axis X forms an angle ⁇ with the longitudinal axis Y of the discharge nozzle.
outlets 8 are formed, both of same size but larger than the openings 8 and arranged in a diametrically opposite position. Said outlets 9 are directed downwards and in such a way that their longitudinal axis W forms an angle ⁇ with the longitudinal axis Y of the discharge nozzle.
both upper outlets 9 and bottom openings 8 is such to give to both the flows of metal passing through them a direction that tends to gather the two flows, i.e. in such a way that the upper flow meets the bottom flow, providing a damping effect on the kinetic energy of both flows, said damping effect increasing as the flow rate increases, and therefore during high production function.
Table 1 illustrates the parameters for optimum sizing of the discharge nozzle, in a non-dimensional form and with reference to figure 2, according to the present invention.
Table 2 illustrates performance parameters, expressed as normalised values, resulting from comparison of the discharge nozzle according to the present invention and a standard two-outlets discharge nozzle.
DISCHARGE NOZZLE DIMENSIONS NON-DIMENSIONAL PARAMETERS Top diameter of duct D Bottom diameter of duct (D') 0.7 ⁇ 0.8 D Top external diameter of discharge nozzle 1.71 D Bottom external diameter of discharge nozzle 1.57 D Position of bottom outlets starting from lower end of discharge nozzle 1.03 D Position of upper outlets starting from lower end of discharge nozzle 2.32 D Angle ⁇ between X axis of bottom outlets and longitudinal axis Y of discharge nozzle 75° ⁇ 15° Angle ⁇ between W axis of upper outlets and longitudinal axis Y of discharge nozzle 75° ⁇ 15° Diameter of upper outlets 0.92 D Diameter of bottom outlets 0.85 D PARAMETERS Standard discharge nozzle Discharge nozzle according to the invention Impact speed (m/s) 0.22 0.13 Impact point (mm) 320 250 Wave index 100 90 Vortex index 100 50 Lack
the present invention is not limited to the embodiment described above, but comprises any alternative version thereof.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Continuous Casting (AREA)
Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Ship Loading And Unloading (AREA)
Fertilizing (AREA)
Moulds For Moulding Plastics Or The Like (AREA)
Nozzles (AREA)

EP97830676A 1996-12-16 1997-12-16 Tauchgiessrohr für Giessformen in Stranggiessanlagen Expired - Lifetime EP0852166B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
ITRM960869		1996-12-16
IT96RM000869A IT1289251B1 (it)	1996-12-16	1996-12-16	Scaricatore per lingotteria in macchine di colata continua

Publications (3)

Publication Number	Publication Date
EP0852166A2 true EP0852166A2 (de)	1998-07-08
EP0852166A3 EP0852166A3 (de)	1998-07-22
EP0852166B1 EP0852166B1 (de)	2002-07-24

Family

ID=11404595

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP97830676A Expired - Lifetime EP0852166B1 (de)	1996-12-16	1997-12-16	Tauchgiessrohr für Giessformen in Stranggiessanlagen

Country Status (5)

Country	Link
EP (1)	EP0852166B1 (de)
AT (1)	ATE220963T1 (de)
DE (1)	DE69714203T2 (de)
ES (1)	ES2183119T3 (de)
IT (1)	IT1289251B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE10113026C2 (de) *	2001-03-17	2003-03-27	Thyssenkrupp Stahl Ag	Tauchrohr für das Vergießen von Metallschmelze, insbesondere von Stahlschmelze
WO2005049249A3 (en) *	2003-11-17	2005-12-29	Vesuvius Crucible Co	Multi-outlet casting nozzle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1287752B (de) *	1966-08-03	1969-01-23	Mannesmann Ag	Verteilerausguss in Stranggiessanlagen
US3371704A (en) *	1967-02-20	1968-03-05	Astrov Evgeny Ivanovitch	Device for supplying molten metal into a mould of a continuous casting machine
JPS61180656A (ja) *	1985-02-07	1986-08-13	Nippon Kokan Kk <Nkk>	連続鋳造用浸漬ノズル
JPS61226149A (ja) *	1985-04-01	1986-10-08	Nippon Kokan Kk <Nkk>	連続鋳造用浸漬ノズル
GB8814331D0 (en) *	1988-06-16	1988-07-20	Davy Distington Ltd	Continuous casting of steel

1996
- 1996-12-16 IT IT96RM000869A patent/IT1289251B1/it active IP Right Grant
1997
- 1997-12-16 EP EP97830676A patent/EP0852166B1/de not_active Expired - Lifetime
- 1997-12-16 ES ES97830676T patent/ES2183119T3/es not_active Expired - Lifetime
- 1997-12-16 DE DE69714203T patent/DE69714203T2/de not_active Expired - Fee Related
- 1997-12-16 AT AT97830676T patent/ATE220963T1/de not_active IP Right Cessation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE10113026C2 (de) *	2001-03-17	2003-03-27	Thyssenkrupp Stahl Ag	Tauchrohr für das Vergießen von Metallschmelze, insbesondere von Stahlschmelze
WO2005049249A3 (en) *	2003-11-17	2005-12-29	Vesuvius Crucible Co	Multi-outlet casting nozzle
CN100415411C (zh) *	2003-11-17	2008-09-03	维苏维尤斯·克鲁斯布公司	多个出口的铸口
RU2358834C2 (ru) *	2003-11-17	2009-06-20	Везувиус Крусибл Компани	Погружной выпускной разливочный стакан (варианты)
US7581664B2 (en)	2003-11-17	2009-09-01	Vesuvius Crucible Company	Multi-outlet casting nozzle

Also Published As

Publication number	Publication date
ITRM960869A1 (it)	1998-06-16
EP0852166B1 (de)	2002-07-24
ES2183119T3 (es)	2003-03-16
DE69714203T2 (de)	2003-03-27
ATE220963T1 (de)	2002-08-15
ITRM960869A0 (it)	1996-12-16
EP0852166A3 (de)	1998-07-22
IT1289251B1 (it)	1998-09-29
DE69714203D1 (de)	2002-08-29

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