EP1445045A1 - Procédé et appareil pour la coulée continue de métal liquide, en particulier d'acier - Google Patents

Procédé et appareil pour la coulée continue de métal liquide, en particulier d'acier Download PDF

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Publication number
EP1445045A1
EP1445045A1 EP04002082A EP04002082A EP1445045A1 EP 1445045 A1 EP1445045 A1 EP 1445045A1 EP 04002082 A EP04002082 A EP 04002082A EP 04002082 A EP04002082 A EP 04002082A EP 1445045 A1 EP1445045 A1 EP 1445045A1
Authority
EP
European Patent Office
Prior art keywords
immersion
area
copper plates
cooling water
spout
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Withdrawn
Application number
EP04002082A
Other languages
German (de)
English (en)
Inventor
Erwin Dr. Wosch
Werner Dr. Rahmfeld
Lothar Parschat
Rolf-Peter Dr. Heidemann
Fritz-Peter Prof. Dr. Pleschiutschnigg
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1445045A1 publication Critical patent/EP1445045A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B22D11/055—Cooling the moulds

Definitions

  • the invention relates to a method and a device for the continuous casting of liquid Metals, especially of liquid steel materials, by pouring the Pouring material into a submerged spout made of water-cooled copper plates formed and oscillating continuous casting mold down to a constant Casting level and if necessary up to a funnel end between the broadside copper plates enough and at least partially with its outer shape the inner shape of the Copper plates is approximated.
  • the continuous casting molds are designed for a constant cooling capacity in width and also in thickness, expressed in W / m 2 . This can be explained by an arrangement as cooling water channels or cooling water bores across the width and constant water speed in each cooling water channel.
  • the invention has for its object by a more uniform cooling of the Metal melt to achieve a more uniform formation of the strand shell, the Development under the premise of the thermal treatment of continuous casting mold and diving spout must stand as a unit.
  • the object is achieved according to the invention in that during the cooling in the area of the heat flow shadow of the immersion nozzle, the heat transfer coefficient ⁇ [W / m 2 • K] is partially reduced such that an isotherm lying in a horizontal height plane is one on the circumference uniform strand shell generated. This takes into account the effect of the immersion pouring in the continuous casting mold. Previous differences in cooling in the heat flow shadow and outside the heat flow shadow no longer occur. This results in a more uniform cooling of the casting metal over the circumference via the isotherm, so that a more uniform strand shell growth is achieved.
  • a further development of the concept of the invention further consists in the fact that the isotherms running in the vertically superimposed and parallel horizontal contour lines on the inner shape of the broadside copper plate each functionally on the full circumference of the inner shape by partially changing the heat transfer coefficient ⁇ [W / m 2 • K] from the beginning of the immersion spout to the middle of the immersion spout and that at the same time this isotherm is supported by a partial water cover over cooling channels at different distances.
  • the lowering of the heat transfer coefficient ⁇ takes place here in combination with the water cover and leads to the advantages mentioned.
  • Another possible variation is achieved in that the isotherm by reducing the amount of water and / or the water speed in the Copper plates of the continuous casting mold is produced opposite the immersion nozzle.
  • Another configuration as a further variation can be used in that that the isotherm is due to a section-wise change in the thickness of the copper plates and / or an applied nickel or chrome layer is generated. This Measure is both on the constructive as well as on an economical construction the continuous casting mold directed.
  • the design options are directed towards a variant that is alternative or additionally the isotherm by expanding a funnel with the funnel provided thin slab or thick slab continuous casting mold in the area of influence of the diving spout is generated or supported.
  • This variant is also one under constructive or economic considerations possibility of a correspondingly higher copper use.
  • the device achieves the object of the invention by designing the cooling water channels or cooling water bores in the broadside copper plates over the length of the area of influence of the immersion spout for such a reduced cooling water speed by means of changed flow channel cross sections and / or for partial water coverage that the heat transfer coefficient ⁇ [ W / m 2 • K] in the area of the immersion pouring shadow is smaller than in the area outside the shadow.
  • This takes into account the effect of the immersion spout. This can compensate for the isolating effect of the immersion nozzle.
  • the resultant compared to the broadside copper plates and the immersion spout The area of influence in the mold plate is limited by the fact that the cooling water channels or the cooling water holes in the area of influence of the immersion spout reduced in cross-section by means of inserts or conical rods becomes.
  • the lateral transitions of the area of influence of the immersion spout can low and graded.
  • cooling water channels or the cooling water holes in the Area of influence of the immersion spout in the sense of a partially reduced water cover are executed. This consists of increasing the distances between the Cooling water channels or the cooling water holes and / or a reduction the flow cross-sectional areas (F).
  • this measure can still go so far be designed so that the broadside copper plates on the hot side with a Nickel or chrome layer is provided.
  • the heat transfer coefficient ⁇ can also be achieved by another alternative or additional measure be lowered that the broadside copper plates in the area of influence of the immersion spout with a given funnel with an expansion of the funnel are provided.
  • the 1 is an example of a continuous casting mold of any casting cross section Unit from a diving spout 1 with a thin slab casting mold 2, the consist of two broad-side copper plates 2a and two narrow-side copper plates 2b, intended.
  • the copper plates 2a either have slot-shaped cooling water channels 3 or round cooling water holes 4.
  • the diving spout 1 is up to immersed under a casting level 5 which is constantly regulated during the casting. In the event that the continuous casting mold 2 has a funnel 6 with a funnel end 6a, the immersion spout 1 extends to the corresponding depth.
  • the liquid Steel material 7 flows through the lateral openings 8 in the arrow directions 9 in the side rooms 10 and around the outer shape 1 a of the immersion spout 1 also in between the outer shape 1a and the broadside copper plate 2a remaining space 11.
  • On the mold level 5 is a by pouring mold powder Slag layer 13 formed to protect against oxidation (Fig. 2).
  • the copper plates 2a and 2b are formed by inflow at the entrance 14a and at the exit 14b flowing cooling water formed, its direction of flow (entrance 14b and exit 14a) can also be reversed.
  • Fig. 3 the position of the immersion spout 1 of seen the side showing the openings 8.
  • the copper plates 2a form the funnel 6, in which the diving spout 1 is set at an unchangeable height.
  • the Cooling in the cooling water channels 3 causes a steadily progressing solidification of the casting material from the outside, which initially becomes a uniform thickness Strand shell 15 leads.
  • the recooling of the heated cooling water, the quantities and speeds are in that receiving the copper plates 2a Water box 19 carried out or set.
  • 3A and 3C are the cooling water channels 3 as cooling water slots and as cooling water bores 4.
  • Fig. 3B the media are shown, the heat flow at different Resistance must penetrate.
  • the liquid steel material 7 (St) the steel in the immersion spout 1 (St / C), the slag lubrication film (SL), and the copper plate 2 is taken into account.
  • the invention then acts in such a way that an isotherm running in the vertical contour lines 18, which are presupposed vertically one above the other and in parallel, on the inner mold 2c extends over the entire circumference 20 of the inner mold 2c due to the partial change in the heat transfer coefficient ⁇ [W / m 2 • K] Beginning of the immersion pouring influence (the outer regions) up to the middle 1b is generated, at the same time this isotherm by a partial water covering 17 (see FIGS. 4 and 5) via cooling channels 3; 4 is supported.
  • FIG. 5 shows an additional measure, on the basis of which this isotherm by partial water cover 17 over differently spaced Cooling channels 3; 4 is supported.
  • the water cover 17 is again arithmetically determined by equating the ⁇ values for the immersion pouring material, the Copper plate 2, the slag SL on the one hand with the values of the immersion spout 1, the ceramic, the casting material 7, the slag SL and the copper plate Cu.
  • the cooling slots is approx. - 0.034. Consequently are (Fig. 5) in the shadow area of the immersion spout 1 fewer cooling water slots to be arranged at a greater distance.
  • FIG. 6 Another alternative (Fig. 6) provides that the isotherm is separated by a section changed thickness 2d of the copper plate 2a is generated.
  • the ⁇ values for the casting material steel (St), the slag (SL) and for copper (Cu) equated to the ⁇ values for the pouring material (St / C), the pouring ceramic (Ref), the casting material steel (St), the slag (SL) and the copper plate (Cu). From this, a theoretical copper thickness is calculated in the shadow area of the Immersion spout of - 725 mm as resistance to the strand shell in the shadow area not too hypothermic.
  • the effects of cooling without (left half) and with (right half) the lowering of the heat transfer coefficient ⁇ can be seen.
  • the cooling capacities KW are the same with regard to the same design of the cooling water slots 3 or the cooling water bores 4.
  • the cooling water channels 3 that are outside the immersion spout influence with the inserts 24 (FIG. 12) or with the conical rods 22 and work with a heat transfer coefficient ⁇ 1. The same applies to the Cooling water holes 4 with the conical rods 22nd

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP04002082A 2003-02-04 2004-01-30 Procédé et appareil pour la coulée continue de métal liquide, en particulier d'acier Withdrawn EP1445045A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10304543 2003-02-04
DE2003104543 DE10304543B3 (de) 2003-02-04 2003-02-04 Verfahren und Einrichtung zum Stranggießen von flüssigen Metallen, insbesondere von flüssigen Stahlwerkstoffen

Publications (1)

Publication Number Publication Date
EP1445045A1 true EP1445045A1 (fr) 2004-08-11

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EP04002082A Withdrawn EP1445045A1 (fr) 2003-02-04 2004-01-30 Procédé et appareil pour la coulée continue de métal liquide, en particulier d'acier

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EP (1) EP1445045A1 (fr)
DE (1) DE10304543B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106077543A (zh) * 2015-05-12 2016-11-09 马鞍山尚元冶金科技有限公司 一种结晶器液面波动抑制装置的制造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102112255B (zh) * 2008-08-06 2014-05-07 Sms西马格股份公司 用于液态金属、特别用于液态钢的连续铸造金属铸型
CN113020266B (zh) * 2021-02-26 2023-03-10 日照钢铁控股集团有限公司 一种薄板坯连铸连轧产线生产45Mn热轧卷板方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026442A1 (fr) * 1993-05-17 1994-11-24 Giovanni Arvedi Moule ameliore utilise pour la coulee continue d'acier, notamment pour la coulee continue de plaques minces
RU2055681C1 (ru) * 1993-12-27 1996-03-10 Институт новой металлургической технологии Кристаллизатор для непрерывной разливки металлов
WO1997004900A1 (fr) * 1995-08-02 1997-02-13 Mannesmann Ag Moule en fonte pour plaques permettant de produire des barres d'acier
DE19702558A1 (de) * 1997-01-24 1998-07-30 Gammal Tarek Prof Dr Ing El Kokille mit geregelter Wärmeabfuhr der inneren Breitseitenplatten zum Stranggießen von Dünnbrammen aus Metall, vorzugsweise Stahl
EP0865849A1 (fr) * 1997-03-17 1998-09-23 Sms Schloemann-Siemag Aktiengesellschaft Lingotière oscillante pour la coulée continue de brames
US5927378A (en) * 1997-03-19 1999-07-27 Ag Industries, Inc. Continuous casting mold and method
EP0931609A1 (fr) * 1998-01-27 1999-07-28 KM Europa Metal AG Moule refroidi par liquide
EP0972590A1 (fr) * 1998-07-16 2000-01-19 Sms Schloemann-Siemag Aktiengesellschaft Lingotière de coulée continue

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002016061A1 (fr) * 2000-08-23 2002-02-28 Sms Demag Aktiengesellschaft Coquille refroidie pour coulee continue permettant la coulee de metal

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026442A1 (fr) * 1993-05-17 1994-11-24 Giovanni Arvedi Moule ameliore utilise pour la coulee continue d'acier, notamment pour la coulee continue de plaques minces
RU2055681C1 (ru) * 1993-12-27 1996-03-10 Институт новой металлургической технологии Кристаллизатор для непрерывной разливки металлов
WO1997004900A1 (fr) * 1995-08-02 1997-02-13 Mannesmann Ag Moule en fonte pour plaques permettant de produire des barres d'acier
DE19702558A1 (de) * 1997-01-24 1998-07-30 Gammal Tarek Prof Dr Ing El Kokille mit geregelter Wärmeabfuhr der inneren Breitseitenplatten zum Stranggießen von Dünnbrammen aus Metall, vorzugsweise Stahl
EP0865849A1 (fr) * 1997-03-17 1998-09-23 Sms Schloemann-Siemag Aktiengesellschaft Lingotière oscillante pour la coulée continue de brames
US5927378A (en) * 1997-03-19 1999-07-27 Ag Industries, Inc. Continuous casting mold and method
EP0931609A1 (fr) * 1998-01-27 1999-07-28 KM Europa Metal AG Moule refroidi par liquide
EP0972590A1 (fr) * 1998-07-16 2000-01-19 Sms Schloemann-Siemag Aktiengesellschaft Lingotière de coulée continue

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEN JIE ET AL: "Design of funnel-shaped part of thin slab caster mould", KANG T'IEH;KANG T'IEH/IRON AND STEEL (PEKING) JAN 1993, vol. 28, no. 1, January 1993 (1993-01-01), pages 22 - 25, XP002280956 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106077543A (zh) * 2015-05-12 2016-11-09 马鞍山尚元冶金科技有限公司 一种结晶器液面波动抑制装置的制造方法

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