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WO2011151162A1 - Procédé et dispositif de production de vapeur surchauffée dans une machine de coulée continue - Google Patents

Procédé et dispositif de production de vapeur surchauffée dans une machine de coulée continue Download PDF

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Publication number
WO2011151162A1
WO2011151162A1 PCT/EP2011/057851 EP2011057851W WO2011151162A1 WO 2011151162 A1 WO2011151162 A1 WO 2011151162A1 EP 2011057851 W EP2011057851 W EP 2011057851W WO 2011151162 A1 WO2011151162 A1 WO 2011151162A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
strand
steam
cooling
continuous casting
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.)
Ceased
Application number
PCT/EP2011/057851
Other languages
German (de)
English (en)
Inventor
Christian Chimani
Vladimir Danov
Susanne Hahn
Martin Kautz
Franz Ramstorfer
Thomas Schaden
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.)
SIEMENS VAI METALS TECHNOLOGIES GmbH
Primetals Technologies Austria GmbH
Original Assignee
SIEMENS VAI METALS TECHNOLOGIES GmbH
Siemens VAI Metals Technologies GmbH Austria
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 SIEMENS VAI METALS TECHNOLOGIES GmbH, Siemens VAI Metals Technologies GmbH Austria filed Critical SIEMENS VAI METALS TECHNOLOGIES GmbH
Priority to CN2011800269991A priority Critical patent/CN102905818A/zh
Priority to EP11720445.3A priority patent/EP2576101A1/fr
Publication of WO2011151162A1 publication Critical patent/WO2011151162A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
    • F01K3/185—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters using waste heat from outside the plant

Definitions

  • the present invention relates to a method and apparatus for generating superheated steam in a
  • the invention relates to a method for producing superheated steam in a continuous casting machine, comprising
  • Evaporation chamber of the mold is evaporated by means of nucleate boiling to saturated steam;
  • Circular process is formed, in particular that the cooling medium after the relaxation, and optionally a subsequent condensation, is fed back to the mold.
  • the invention relates to a device for generating superheated steam in a continuous casting machine, comprising
  • Feed pump is connected to the mold.
  • liquid steel is poured into a downwardly open mold, the so-called mold, wherein the
  • Molten metal is cooled mainly on the mold walls, so that forms a stable strand shell in the mold.
  • the at least partially solid strand becomes
  • the cooling of the molten metal in the mold is also referred to as primary cooling and the cooling of the drawn strand in the strand support means as secondary cooling. It is known to form the mold walls of copper plates, wherein the
  • Temperaturhubs not a conventional heat recovery (such as a steam turbine) are supplied. Due to the high flow rates of the cooling water through the mold, there are also high pressure losses, which results in high overall temperatures
  • Heat pipes (English, heat pipes) in the shell of a mold to integrate, so that the overall thermal conductivity of the mold is increased. Although heat pipes can be beneficial, direct use of it is inside the heat pipes
  • the melt is cooled in the mold to form a solid strand shell, wherein by cooling the
  • the saturated steam is overheated to a superheated saturated steam or a superheated steam
  • the superheated steam is expanded in a steam turbine, wherein the method for generating superheated steam is designed as a cyclic process.
  • a disadvantage of this method is that the mold - due to the high temperature of the superheated steam - is also exposed to very high temperatures, so that the mold must be made on the one hand of highly heat-resistant materials, but on the other hand the
  • the object of the invention is a method and apparatus for generating superheated steam in a
  • Cooling medium in particular an alcohol or a thermal oil, is used and the superheated steam before relaxation has a temperature of 180 to 400 ° C.
  • evaporating the organic cooling medium in at least one evaporation space for example, the space between a copper plate and the water box
  • a very good heat transfer i.e., boiling
  • Under bladder boiling (engl.
  • nucleate boiling cf. e.g. Fig. 9.2 in John H. Lienhard. The heat transfer textbook, Third edition, Phlogiston Press, 2003 or the curve range between the points A and C (partial nucleate boiling and fully developed nucleate boiling) in the "typical boiling curve" on
  • Heat flux density is. Since the evaporation of the cooling medium in the evaporation space directly, i. can be done without a DC link, the process is very simple and
  • Superheated steam also referred to as superheated saturated steam
  • the Overheat the Carnot's efficiency see, eg
  • the mold is fed again.
  • an organic cooling medium e.g. an alcohol or a thermal oil, wherein the hot steam before the relaxation has a temperature of 180 to 400 ° C. Because organic cooling media available in conventional
  • Circuit comprises at least the mold and the superheater, and the second circuit comprises at least the steam turbine and a condenser.
  • both circuits would be e.g. via at least one heat exchanger with each other
  • molten salts to be used for secondary circulation; It is advantageous, in turn, to use the organic cooling media described above for the primary circuit.
  • water could also be used as the cooling medium, wherein the superheated steam before relaxation has a temperature of 200 to 400 ° C.
  • the saturated steam is overheated by cooling the strand, wherein the saturated steam is guided in at least one line along at least one surface of the strand.
  • the saturated steam e.g. passed over partially or solidified steel slabs.
  • Vapor pressure adjusting device is set to a predetermined pressure. This measure has a favorable effect especially when starting the continuous casting.
  • the object of the invention is also by a
  • the mold is connected to at least one superheater to overheat the saturated steam and the superheater as a
  • Continuous casting machine is formed.
  • the amount of heat dissipated by the secondary cooling of the partially solidified or continuously solidified strand is also absorbed by the saturated steam.
  • High-pressure steam turbine to arrange parallel and then, ie in a serial arrangement, to arrange one or more low-pressure steam turbines.
  • at least one line in the superheater is meandering for uniform cooling of the strand
  • a condenser in a cooling section preferably in a cooling section in the outlet region of
  • the mold at least in the region of the meniscus in a direction transverse to
  • a plate made of copper or a copper alloy a plate made of copper or a copper alloy, a ribbed plate for evaporating the cooling medium and a holding plate.
  • G hasslestrang removed and the continuous casting machine compact, in particular with a smaller metallurgical length, can be formed.
  • Fig. 1 is a schematic representation of a continuous casting machine with heat recovery
  • Fig. 2 is a schematic diagram of the thermodynamic
  • Fig. 3 is a schematic diagram of the thermodynamic
  • FIG. 4 shows a schematic representation of a superheater which is integrated into the secondary cooling of the continuous casting machine
  • FIG. 5 shows a schematic representation of a condenser which is integrated into a cooling section
  • Fig. 6 is a schematic representation of the structure of a
  • Fig. 1 shows a continuous casting machine for the production of steel ⁇ slabs, by means of the continuous casting
  • Molten steel melt introduced by means of a pan, not shown, via a distributor in a mold 2, in which the melt is cooled by means of the primary cooling 3, wherein a solid strand shell is formed. That's how it is
  • the strand support device 5 has a plurality of strand guide segments ⁇ not shown in detail, each having a plurality of both sides of the strand 12 arranged strand guide rollers 5a.
  • the initially liquid cooling medium water of about 35 ° C (point II) is heated to about 200 ° C (point III) and then evaporated in several evaporation chambers of the mold by means of nucleate boiling to saturated steam (point IV).
  • point II the initially liquid cooling medium water of about 35 ° C
  • point III point III
  • point IV nucleate boiling to saturated steam
  • a large part of the molten steel or the partially solidified strand 12 extracted heat is absorbed by the cooling medium and thus increases the entropy of the cooling medium (see Fig. 2).
  • the saturated steam is supplied via a steam line to a superheater 4, in which the saturated steam is passed over at least one meandering line over the approximately 900 ° C hot slab and thereby absorbs energy;
  • the saturated steam of about 200 ° C (point IV) is heated to about 330 ° C (point V) to superheated steam.
  • the superheated saturated steam by means of a Steam line fed to a steam turbine 7, in which the steam from point V to point VI relaxed and thereby free
  • the cooling medium is first fed to a first condenser 9 and then to a second condenser 9a in which the entropy of the cooling medium is further reduced.
  • the first capacitor 9 is part of the cooling section 10 in the outlet region of the
  • Strand 12 is cooled by means not shown spray nozzles to near room temperature (point I). At least one circulating pump 11 increases the pressure of the cooling medium, so that this again the steam generator 1, i. the primary cooling 3 of the mold 2, is supplied.
  • thermodynamic state variables assumed in the process according to FIG. 1 are again shown in FIG. 2 in an entropy-temperature diagram for the cooling medium water
  • FIG. 3 shows the thermodynamic state variables in an entropy-temperature diagram for the process according to FIG. 1 for the cooling medium methanol. Compared to Fig. 2, the cooling medium methanol, the temperature in the
  • Cooling medium water would be possible. Specifically, the cooling medium is heated in the evaporation space of the mold from about 35 ° C (point II) to a temperature of only about 100 ° C (point III), before the evaporation of methanol begins. In point IV, the methanol is then completely evaporated. In the superheater 4, the methanol is superheated to about 180 ° C (point V) before it is expanded in the steam engine 7. After relaxation in the steam engine 7 (point IV), the cooling medium
  • the invention is by no means limited to methanol; much more Other organic cooling media such as ethanol or thermal oils can also be used.
  • a superheater 4 is shown schematically.
  • the saturated steam is guided in at least one meandering line 13 at a small distance over the surface of the partially orteurerstarrten strand 12, wherein the strand is cooled further and thereby a large part of the thereby dissipated amount of heat is used to overheat the saturated steam.
  • the meandering line 13 is counter-flowed against the casting direction 15, so that while the saturated steam initially absorbs energy from a colder strand and later energy from a warmer strand.
  • a capacitor is shown schematically. At the top of the strand 12, the strand of several
  • Cooling water is used for condensation of the cooling medium within a meandering line 13.
  • the superheater shown in FIG. 4 the
  • Condenser 9 flows in the casting direction 15, so that the
  • Cooling medium is initially cooled by a warmer cooling water and later by a colder cooling water. Should the
  • Capacitors e.g. Dubbel. Paperback for Mechanical Engineering, 17th Edition, Chapter K22 "Components of the thermal energy
  • Fig. 6 the structure of a mold 2 in a direction transverse to the casting direction 15 is shown schematically, wherein the representation of the dip tube for reasons of
  • Clarity was waived. Between the steel 16, which forms a partially solidified strand in the mold, and the mold 2, there is a layer of casting powder 17 to the friction between the strand and the mold to
  • the copper plate 19 of the mold has a highly abrasion-resistant, wear-resistant layer of a ceramic 18 or a ceramic
  • Composite materials of ceramic materials in a metallic matrix (a so-called cermet material, see eg http://de.v7ikipedia.org/wiki/Cermet).
  • cermet material a so-called cermet material
  • a ribbed plate 20 having a plurality of extending in the casting direction and / or in a direction transverse to the casting direction ribs 21.
  • a holding plate 22 which is connected by means of several designed as screws fasteners with the ribbed plate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Continuous Casting (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de production de vapeur surchauffée dans une machine de coulée continue, et l'utilisation dudit dispositif dans une installation de coulée continue destinée à produire une barre d'acier. L'invention vise à mettre au point un procédé et un dispositif de production de vapeur surchauffée qui permettent d'évacuer des quantités élevées de chaleur de la lingotière à partir de températures relativement basses, la valeur énergétique de la vapeur surchauffée étant néanmoins élevée, de sorte qu'elle peut être apportée à une turbine à vapeur pour la récupération de chaleur. A cet effet, le procédé selon l'invention consiste à utiliser un réfrigérant organique, en particulier un alcool ou une huile thermique, la vapeur surchauffée présentant avant la détente une température comprise entre 180 et 400 °C.
PCT/EP2011/057851 2010-06-01 2011-05-16 Procédé et dispositif de production de vapeur surchauffée dans une machine de coulée continue Ceased WO2011151162A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2011800269991A CN102905818A (zh) 2010-06-01 2011-05-16 用于在连铸机中产生过热蒸汽的方法和装置
EP11720445.3A EP2576101A1 (fr) 2010-06-01 2011-05-16 Procédé et dispositif de production de vapeur surchauffée dans une machine de coulée continue

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT8972010A AT509894A1 (de) 2010-06-01 2010-06-01 Verfahren und vorrichtung zur erzeugung von überhitztem sattdampf in einer stranggiessmaschine
ATA897/2010 2010-06-01

Publications (1)

Publication Number Publication Date
WO2011151162A1 true WO2011151162A1 (fr) 2011-12-08

Family

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PCT/EP2011/057851 Ceased WO2011151162A1 (fr) 2010-06-01 2011-05-16 Procédé et dispositif de production de vapeur surchauffée dans une machine de coulée continue

Country Status (4)

Country Link
EP (1) EP2576101A1 (fr)
CN (1) CN102905818A (fr)
AT (1) AT509894A1 (fr)
WO (1) WO2011151162A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013013788A1 (fr) * 2011-07-22 2013-01-31 Heinrich Marti Procédé d'exploitation d'énergies thermiques, de préférence dans une installation de coulée continue
CN103894561A (zh) * 2014-03-14 2014-07-02 林立峰 连铸热回收系统及方法
AT515566A1 (de) * 2014-03-06 2015-10-15 Inteco Special Melting Technologies Gmbh Verfahren zur Kühlung von flüssigkeitsgekühlten Kokillen für metallurgische Prozesse
AT523552A1 (de) * 2020-02-21 2021-09-15 Falkinger Ing Walter Stranggusswärmenutzung für Einsatzmaterial eines E - Ofens
BE1029218B1 (nl) * 2021-03-19 2022-10-19 Koenraad Vermout Warmterecuperatie bij industriële processen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6989060B2 (ja) * 2019-07-11 2022-01-05 Ｊｆｅスチール株式会社 連続鋳造鋳片の２次冷却方法および２次冷却装置
WO2024006604A1 (fr) * 2022-06-27 2024-01-04 Novelis Inc. Systèmes et procédés de condensation de vapeur dans une fosse de coulée à refroidissement direct d'aluminium

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JPS57130752A (en) * 1981-02-03 1982-08-13 Sumitomo Heavy Ind Ltd Continuous casting machine
JPS57187151A (en) * 1981-05-13 1982-11-17 Nippon Steel Corp Cooler for continuously cast ingot
JPS58138545A (ja) * 1982-02-12 1983-08-17 Sumitomo Metal Ind Ltd 連続鋳造装置の冷却方法
US4610295A (en) * 1983-11-10 1986-09-09 Aluminum Company Of America Direct chill casting of aluminum-lithium alloys
JPH01143743A (ja) 1987-11-27 1989-06-06 Nkk Corp 連続鋳造用鋳型
CN2379234Y (zh) 1999-06-10 2000-05-24 赵国理 连铸机钢铁水余热回收利用装置
US20020170700A1 (en) * 2000-09-01 2002-11-21 Shigeru Yanagimoto Metal-casting method and apparatus, casting system and cast-forging system
WO2006092786A2 (fr) * 2005-03-01 2006-09-08 Ormat Technologies Inc. Fluides de travail organiques
EP1785206A1 (fr) 2005-11-10 2007-05-16 Siemens Aktiengesellschaft Procédé et dispositif de refroidissement une coquille pour la coulée continue par vapeur
WO2010099931A2 (fr) * 2009-03-02 2010-09-10 Sms Siemag Ag Procédé et dispositif de récupération d'énergie dans une installation de production d'un produit métallique
WO2011051010A1 (fr) * 2009-10-28 2011-05-05 Siemens Aktiengesellschaft Récupération de chaleur et dégradation de la surchauffe d'une masse métallique fondue dans un procédé de coulée continue

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JPS58192662A (ja) * 1982-05-07 1983-11-10 Nippon Steel Corp 鋼の連続鋳造鋳型より熱回収を行なう方法
CN101260816A (zh) * 2008-04-18 2008-09-10 朱学仪 一种回收利用钢坯余热的方法及装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130752A (en) * 1981-02-03 1982-08-13 Sumitomo Heavy Ind Ltd Continuous casting machine
JPS57187151A (en) * 1981-05-13 1982-11-17 Nippon Steel Corp Cooler for continuously cast ingot
JPS58138545A (ja) * 1982-02-12 1983-08-17 Sumitomo Metal Ind Ltd 連続鋳造装置の冷却方法
US4610295A (en) * 1983-11-10 1986-09-09 Aluminum Company Of America Direct chill casting of aluminum-lithium alloys
JPH01143743A (ja) 1987-11-27 1989-06-06 Nkk Corp 連続鋳造用鋳型
CN2379234Y (zh) 1999-06-10 2000-05-24 赵国理 连铸机钢铁水余热回收利用装置
US20020170700A1 (en) * 2000-09-01 2002-11-21 Shigeru Yanagimoto Metal-casting method and apparatus, casting system and cast-forging system
WO2006092786A2 (fr) * 2005-03-01 2006-09-08 Ormat Technologies Inc. Fluides de travail organiques
EP1785206A1 (fr) 2005-11-10 2007-05-16 Siemens Aktiengesellschaft Procédé et dispositif de refroidissement une coquille pour la coulée continue par vapeur
WO2010099931A2 (fr) * 2009-03-02 2010-09-10 Sms Siemag Ag Procédé et dispositif de récupération d'énergie dans une installation de production d'un produit métallique
WO2011051010A1 (fr) * 2009-10-28 2011-05-05 Siemens Aktiengesellschaft Récupération de chaleur et dégradation de la surchauffe d'une masse métallique fondue dans un procédé de coulée continue

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* Cited by examiner, † Cited by third party
Title
JOHN H. LIENHARD: "The heat transfer textbook", 2003, PHLOGISTON PRESS

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013013788A1 (fr) * 2011-07-22 2013-01-31 Heinrich Marti Procédé d'exploitation d'énergies thermiques, de préférence dans une installation de coulée continue
AT515566A1 (de) * 2014-03-06 2015-10-15 Inteco Special Melting Technologies Gmbh Verfahren zur Kühlung von flüssigkeitsgekühlten Kokillen für metallurgische Prozesse
CN103894561A (zh) * 2014-03-14 2014-07-02 林立峰 连铸热回收系统及方法
CN103894561B (zh) * 2014-03-14 2016-03-16 林立峰 连铸热回收系统及方法
AT523552A1 (de) * 2020-02-21 2021-09-15 Falkinger Ing Walter Stranggusswärmenutzung für Einsatzmaterial eines E - Ofens
BE1029218B1 (nl) * 2021-03-19 2022-10-19 Koenraad Vermout Warmterecuperatie bij industriële processen

Also Published As

Publication number Publication date
CN102905818A (zh) 2013-01-30
EP2576101A1 (fr) 2013-04-10
AT509894A1 (de) 2011-12-15

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