US20130269905A1 - Melt charging system for strip casting - Google Patents

Melt charging system for strip casting Download PDF

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Publication number
US20130269905A1
US20130269905A1 US13/813,186 US201113813186A US2013269905A1 US 20130269905 A1 US20130269905 A1 US 20130269905A1 US 201113813186 A US201113813186 A US 201113813186A US 2013269905 A1 US2013269905 A1 US 2013269905A1
Authority
US
United States
Prior art keywords
run
heating
nozzle
out element
charging system
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.)
Abandoned
Application number
US13/813,186
Other languages
English (en)
Inventor
Joerg Bausch
Reiner Puerling
Jochen Schlueter
Jochen Wans
Karl-Heinz Spitzer
Hellfried Eichholz
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 Siemag 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 Siemag AG filed Critical SMS Siemag AG
Assigned to SMS SIEMAG AG reassignment SMS SIEMAG AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EICHHOLZ, HELLFRIED, SPITZER, KARL-HEINZ, SCHLUETER, JOCHEN, WANS, JOCHEN, PUERLING, REINER, BAUSCH, JOERG
Publication of US20130269905A1 publication Critical patent/US20130269905A1/en
Abandoned 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal
    • B22D11/0642—Nozzles

Definitions

  • the invention relates to a melt charging system for the horizontal strip casting of a molten metal with a run-out element, in particular with a casting nozzle for the free overflow of the molten metal, referred to as “nozzle” further below.
  • the horizontal strip casting of metals also referred to as Direct Strip Casting and BCT (Band Casting Technology)
  • BCT Block Casting Technology
  • the forming or rolling step here has the purpose of both reducing the thickness and also of restructuring, i.e., recrystallizing. It is a method intended for the production of a wide hot rolled strip for steel alloys.
  • melt casting liquid steel is charged through a feed system with an appropriately designed nozzle onto a circulating conveyor belt cooled with water from below.
  • the melt addition in the horizontal strip casting occurs via the melt charging vessel or charging system.
  • the melt flows through a filling region and subsequently a run-out region, before it reaches the conveyor belt through a ceramic component, for example, a nozzle with free overflow.
  • the conveyor belt is driven and guided by two deflection rollers.
  • the melt charged onto the conveyor belt solidifies completely while still in the region of the primary cooling. After the solidification, the strip moves for inline rolling into the rolling stand. After the inline rolling and an additional cooling process, the strip is wound.
  • Such a casting method for strip casting is known from DE 198 52 275 A1.
  • a very long preheating time in the region of the metal charging in the melt charging system i.e., up to the time immediately before the entry of the melt, cannot be carried out as a result of the melt being rendered inert by means of an inert gas, which also occurs in the region of the metal charging.
  • the problem of the invention is to avoid the disadvantages of the state of the prior art and in particular the freezing on of the solidifying metal at the outlet of the run-out element (nozzle).
  • this problem is solved in a melt charging system of the type mentioned at the start in that, in the region of the run-out element, at least one heating device for heating the run-out element is arranged.
  • an active heating of the run-out element i.e., in particular the nozzle
  • the region near the nozzle can also be heated.
  • a particularly suitable embodiment of the invention provides for the run-out element itself to be provided with the heating device, or for the heating device to be arranged adjacently to the run-out element.
  • the run-out element is preferably designed partially from a fire-resistant ceramic.
  • the heating device is designed as a gas heater and/or an electrical heater.
  • the heater is arranged or integrated in a bottom, in side walls, in a weir, a dam, an overflow and/or a cover of the run-out element or of the nozzle.
  • the heating device is preferably arranged, in the form of heating rods, in recesses or grooves in the bottom and/or in the cover.
  • the heating device is surrounded by ceramic components. They can be used in different geometries.
  • the heating rods are designed as carbide heating rods, in particular as lithium carbide or as silicon carbide heating rods.
  • the heating device comprises at least one pore burner
  • the pore burner can be operated with a liquid heating agent, but preferably with a gas.
  • a combustion reaction occurs in a ceramic foam.
  • the pore burner can thus fill a nozzle bottom part and/or top part completely or partially in terms of surface area. Owing to the high surface power density that can be achieved with the pore burner, the latter can be operated as a compact burner unit. Since the burner power can be adjusted in a continuously variable manner, it is possible to provide the burner heat in a finely dosed manner as required respectively in the process, in order to adapt the nozzle surfaces to the melting parameters required in the respective melting process.
  • inductive heating means are advantageously used, for example, WS “Inducer” Company RHI.
  • the coil geometry should be adapted to the ceramic component to be heated, in order to ensure a rapid and even heating.
  • the ceramic should moreover have a sufficient electrical conductivity in order to allow, together with the required power density, a brief heating time of preferably approximately 10 minutes.
  • the melt charging system according to the invention advantageously also provides a unit for feeding an inert gas on the line section of the metal strip to be cast in the region of the run-out element.
  • the radiation also heats the ceramic. All that needs to be done is take suitable cooling measures for the conveyor belt by means of which the metal strip is transported for removal.
  • the heating elements can be integrated in the bottom of the nozzle, particularly in the region of an overflow, in a dam, a weir or in the sidewalls of the nozzle.
  • the advantage provided by the invention is also that the casting process is more robust with regard to time and also temperature losses.
  • the casting can here also occur over a longer time period.
  • FIG. 1 shows a diagrammatic side view of an installation for strip casting
  • FIG. 2 shows a cross-sectional view of a run-out region provided with heating elements in an installation for strip casting
  • FIG. 3 is a perspective view, with partial cross section, of a nozzle in an installation for strip casting.
  • the oven 2 can be opened downward to a tapping channel 5 .
  • the stopper rod 4 is mounted in the closed state opposite a sealing ring 6 .
  • the melt flows out of the tapping channel 5 into a preferably also heated or insulated charging vessel 7 . From the latter, the melt is through an outlet channel 8 which ends in an outlet run-out region, particularly in a nozzle 9 .
  • the nozzle 9 is provided with a dam 10 and with a weir 11 in order to channel the stream of the melt.
  • a gas nozzle 12 is provided, which generates a stream of an inert gas against the direction of flow of the melt, in order to distribute the melt, preferably also transversely to the casting direction, and/or in order to prevent the surface corrosion of the solidifying melt.
  • Said melt forms a metal strip 14 on an endless conveyor belt 13 .
  • the conveyor belt 13 runs over a deflection or drive roller 15 . Furthermore, the conveyor belt 13 is led over supporting rollers 16 and/or a honeycomb grid. Between the latter, spraying nozzles 17 are arranged, which spray a cooling medium collected from a basin 18 onto the bottom side of the conveyor belt 13 in order to solidify the metal strip 14 .
  • shaping segments are provided that move along with said conveyor belt, and are arranged with mutual overlap or closely adjacent to each other, in order to prevent the run-out of the solidifying metal.
  • the spacing of the segments is determined either by the width of the conveyor belt 13 or it is adjustable in accordance with the desired width.
  • a nozzle 9 constructed like nozzle 9 and therefore provided with the same reference numeral ( FIG. 2 ) is provided at several places with heating elements, in order to make available, by way of the surfaces abutting against the metal melt, a constant ambient temperature for the melt.
  • heating devices are provided both in the nozzle top part 19 and also in the nozzle bottom part 20 .
  • two heating devices 21 , 22 are arranged one after the other in the direction of flow of the melt.
  • Each one of the heating devices 21 , 22 comprises a heating rod 24 housed in a ceramic pipe 23 .
  • a heating rod 26 is also arranged in a front weir 25 of the nozzle 11 .
  • the weir here is preferably designed inside as a ceramic pipe.
  • the heating rod 26 can be integrated in the ceramic pipe.
  • the weir 25 on the outlet side, controls the flow of the melt out of the nozzle 9 .
  • a heating rod 28 is accommodated in the nozzle bottom part 20 .
  • the heating rods 24 , 26 , 28 are produced, for example, from silicon carbide or lithium carbide.
  • heating rods 33 , 34 are formed on the top side and they extend transversely to the direction of flow of the melt which is exiting the nozzle via a dam 35 .
  • the nozzle top and bottom parts 19 , 20 and 31 , 32 are made completely from a fire-resistant ceramic, for example.
  • the fire-resistant ceramic can be provided with recesses into which the ceramic jacketed heating elements, such as the heating rods 33 , 34 , are introduced.
  • the nozzle top and bottom parts 19 , 20 and 31 , 32 can also be made of a metal having a sufficiently high melting temperature.
  • the nozzle top and bottom parts 19 , 20 and 31 , 32 can also be made entirely or completely of steel, for example, a stainless steel with properties that are adapted to the use, particularly with regard to corrosiveness, wherein, in this case as well, heating rods with ceramic jacketing can be introduced into appropriate recesses in the nozzle top and bottom parts.
  • the arrow S in FIGS. 2 and 3 denotes the direction of flow of the melt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Coating With Molten Metal (AREA)
  • Furnace Details (AREA)
  • Furnace Charging Or Discharging (AREA)
US13/813,186 2010-07-31 2011-07-29 Melt charging system for strip casting Abandoned US20130269905A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010033018A DE102010033018A1 (de) 2010-07-31 2010-07-31 Schmelzenaufgabesystem zum Bandgießen
DE102010033018.3 2010-07-31
PCT/EP2011/063098 WO2012016922A1 (de) 2010-07-31 2011-07-29 SCHMELZENAUFGABESYSTEM ZUM BANDGIEßEN

Publications (1)

Publication Number Publication Date
US20130269905A1 true US20130269905A1 (en) 2013-10-17

Family

ID=44629759

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/813,186 Abandoned US20130269905A1 (en) 2010-07-31 2011-07-29 Melt charging system for strip casting

Country Status (8)

Country Link
US (1) US20130269905A1 (ko)
EP (1) EP2598268B1 (ko)
KR (1) KR20130041927A (ko)
CN (1) CN103025456B (ko)
BR (1) BR112013002475A2 (ko)
DE (1) DE102010033018A1 (ko)
RU (1) RU2628590C2 (ko)
WO (1) WO2012016922A1 (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016116711A1 (de) 2016-09-07 2018-03-08 Salzgitter Flachstahl Gmbh Verfahren zur Herstellung eines Metallbandes auf einer horizontalen Bandgießanlage
DE102017221969A1 (de) 2017-12-05 2019-06-06 Sms Group Gmbh Verfahren und Vorrichtung zur Herstellung eines bandförmigen Verbundmaterials

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587718A (en) * 1968-05-22 1971-06-28 Robert K Hopkins Continuous casting apparatus
US4619309A (en) * 1978-01-30 1986-10-28 Swiss Aluminium Ltd. Nozzle for strip casting
US5355937A (en) * 1991-09-27 1994-10-18 Wieland-Werke Ag Method and apparatus for the manufacture of a metal strip with near net shape
US5439047A (en) * 1994-02-07 1995-08-08 Eckert; C. Edward Heated nozzle for continuous caster

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1396701A (en) * 1971-07-16 1975-06-04 Singer A R E Strip casting
DE4039959C1 (ko) * 1990-12-14 1992-01-23 Wieland-Werke Ag, 7900 Ulm, De
DE19852275C2 (de) 1998-11-13 2002-10-10 Sms Demag Ag Anlage und Verfahren zum Bandgießen
DE102004015713B4 (de) * 2004-03-29 2006-03-30 Thyssenkrupp Steel Ag Gießdüse zum Vergießen von aus Magnesium oder einer Magnesiumlegierung erschmolzener Schmelze zu gegossenem Band
EP2026922A1 (de) * 2006-05-16 2009-02-25 SMS Demag AG Heizeinrichtung zum vorwärmen eines flüssigmetall-transportbehälters
EP1946866A1 (de) * 2007-01-20 2008-07-23 MKM Mansfelder Kupfer und Messing GmbH Verfahren und Vorrichtung zum Vergiessen von NE-Metallschmelzen, insbesondere Kupfer oder Kupferlegierungen
DE102009031236B3 (de) * 2009-06-26 2010-12-02 Salzgitter Flachstahl Gmbh Verfahren und Vorrichtung zum Erzeugen von Stahlbändern mittels Bandgießen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587718A (en) * 1968-05-22 1971-06-28 Robert K Hopkins Continuous casting apparatus
US4619309A (en) * 1978-01-30 1986-10-28 Swiss Aluminium Ltd. Nozzle for strip casting
US5355937A (en) * 1991-09-27 1994-10-18 Wieland-Werke Ag Method and apparatus for the manufacture of a metal strip with near net shape
US5439047A (en) * 1994-02-07 1995-08-08 Eckert; C. Edward Heated nozzle for continuous caster

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Industrial Applications, http://www.promeos.com/cms/upload/Anwendungen/promeos_industrial_applications_aluminum_2006.pdf, 2006 *
Kellner et al., Energy conservation and process improvement in the aluminium industry through gas porous burner, Heat Processing, Vol. 4, Issue 2, pp. 136-137, 2006 *

Also Published As

Publication number Publication date
RU2628590C2 (ru) 2017-08-21
WO2012016922A1 (de) 2012-02-09
CN103025456A (zh) 2013-04-03
BR112013002475A2 (pt) 2016-05-24
KR20130041927A (ko) 2013-04-25
EP2598268B1 (de) 2019-09-11
DE102010033018A1 (de) 2012-02-02
RU2013108515A (ru) 2014-09-10
CN103025456B (zh) 2016-04-20
EP2598268A1 (de) 2013-06-05

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AS Assignment

Owner name: SMS SIEMAG AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAUSCH, JOERG;PUERLING, REINER;SCHLUETER, JOCHEN;AND OTHERS;SIGNING DATES FROM 20130206 TO 20130620;REEL/FRAME:030728/0247

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION