EP1140391B1 - Verfahren und vorrichtung zum einstellen und/oder halten der temperatur einer schmelze, bevorzugt einer stahlschmelze beim stranggiessen - Google Patents

Verfahren und vorrichtung zum einstellen und/oder halten der temperatur einer schmelze, bevorzugt einer stahlschmelze beim stranggiessen Download PDF

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Publication number
EP1140391B1
EP1140391B1 EP00901067A EP00901067A EP1140391B1 EP 1140391 B1 EP1140391 B1 EP 1140391B1 EP 00901067 A EP00901067 A EP 00901067A EP 00901067 A EP00901067 A EP 00901067A EP 1140391 B1 EP1140391 B1 EP 1140391B1
Authority
EP
European Patent Office
Prior art keywords
melt
temperature
induction coil
heat
cooling
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.)
Expired - Lifetime
Application number
EP00901067A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1140391A1 (de
Inventor
Horst Grothe
Markus Reifferscheid
Raimund Brückner
Karl-Heinz Schmitt
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
Didier Werke AG
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 Didier Werke AG, SMS Demag AG filed Critical Didier Werke AG
Publication of EP1140391A1 publication Critical patent/EP1140391A1/de
Application granted granted Critical
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    • 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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means
    • B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
    • 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
    • B22D11/11—Treating the 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
    • B22D11/16—Controlling or regulating processes or operations
    • 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
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means

Definitions

  • the invention relates to a method for adjusting and / or maintaining the temperature a melt preferably a molten steel, wherein the temperature of the Melt measured in a vessel, the measurement result with a predetermined Temperature range compared in terms of nominal values and the melt supplied by electrical induction of an induction coil so much heat or is removed by means of a cooling device, that the temperature of the melt within the target range.
  • the invention also relates to a device to carry out the process.
  • tundish In continuous casting, especially steel, is in the distribution vessel, in the following Also called tundish, for quality and operational reasons one as uniform as possible a temperature of the melt, or the observance of a narrow temperature window, aimed. Due to the temperature losses of Melt in the pan, when transferring from the pan to the distributor and in the distributor itself, the casting time is limited in time.
  • a device for controlling the temperature of the melt in Manifold can have different melt temperatures in the pans balanced in the distributor and the possible casting time can be extended.
  • the Advantages of such a device are still in a greater flexibility in casting disorders and especially in the homogenization of the temperature level in the tundish. From this quality advantages in the continuous casting product expected. Also a casting closer to the liquidus becomes possible.
  • Plasma heaters which are usually positioned above the distributor.
  • the principle of plasma heating is in a vertical tundish level following chamber with electrodes an arc on one to transfer free metal surface.
  • the arc is stabilized with argon-hence the term plasma.
  • the steel either over dams and weirs or additional to be attached Flushing, z.
  • a disadvantage of this process variant is the necessary free surface of the melt within the chamber so that physical and chemical interactions between the chamber atmosphere and the melt are to be expected. Due to the very high temperatures in the arc, vapor and dust build up within the chamber. Furthermore, inductive Tundish heaters are known in which a distinction is made between so-called crucible inductors and gutter or channel inductors, which are usually firmly flanged connected to the construction of the manifold. The gutter inductors compared to the crucible inductors are relatively expensive to manufacture and maintain.
  • US-A-5 084 089 describes at a recessed area of a manifold externally fixedly arranged induction coils and one in the melt in the Distributor submerged cooling device to regulate the melt temperature.
  • inductive heating arise from lack of contact with the Melt, as well as by the induced electromagnetic alternating field accompanying force generation in the melt, leading to a stirring movement the melt and thus to a faster Wärmverieilung within of the distribution vessel provides.
  • Disadvantages of the previously performed inductive Tundish heaters arise from the firm attachment to the tundish, the has a negative impact on flexibility. Also, the necessary maintenance and Maintenance effort is significant.
  • the non-prepublished patent application DE 197 52 548 A1 relates to a Method for adjusting and maintaining the temperature, in particular one Molten steel, in narrow temperature limits over the casting time during continuous casting, wherein the decrease in the temperature is compensated by heating.
  • the process is improved by the fact that the temperature of the melt at Outlet of the distribution vessel measured, the measurement result with the specified compared lower temperature limit and the melt when reaching or Falling below the limit value is heated until the temperature is again within the setpoint range. This is also a warming the melt mentioned by an inductively operating heater, without that the necessary means or a corresponding device described are.
  • the document EP 0 657 236 A1 describes a batch operation designed for tiltable casting container for casting a molten metal with a inductive heating.
  • This includes one with an adjustable distance, parallel arranged to the metal mirror, traceable in the vertical direction, flat circular induction coil, through which the melt by direct coupling of the induced electromagnetic alternating field without contact is heated. Since the efficiency of the inductive field with increasing Distance of the induction coil to the melt decreases sharply, the distance is possible to keep low. For this purpose, an operation without cover slag is necessary whereby a direct contact between melt and atmosphere arises.
  • the device described is already due to the design as a batch reactor for the continuous operation of a distribution vessel during continuous casting not suitable.
  • an operation under atmospheric access is in steel because of the immediate onset of physical and chemical reactions between molten steel and atmosphere not possible.
  • the invention has the object based, a method referred to in the preamble of claim 1 Art and to provide a suitable device for its implementation, which while avoiding the existing disadvantages of the prior art and Difficulties a technically uncomplicated, flexible and therefore economical advantageous temperature control of a molten metal in a distribution vessel allows.
  • the melt temperature in a refractory, closed at the bottom Molded induction coil is immersed in the melt.
  • the Heating power of the device hereinafter also referred to as heating element, is regulated by the current intensity of the current flowing through the induction coil.
  • the induction coil is by a cooling fluid, preferably air, from the inside and / or cooled outside.
  • the process provides that the melt heat by heat conduction is transmitted from the wall of the molding, which in turn induced on the coupled electromagnetic alternating field.
  • the melt may heat by coupling the electromagnetic Alternating field are supplied. Also, the melt can by means of heat conduction Heat is removed through the wall of the molding.
  • the invention further includes an apparatus for carrying out the method according to the invention, wherein the molded part with an inductively coupled, refractory, bottom closed tube is formed, which is the induction coil interchangeable and fluid cooling, in particular air cooling, receives, is immersed in the melt and at the top Outlets for carrying out the fluid-cooled conductors and connections for supplying and removing optionally additional cooling fluid.
  • the heater shown in FIG. 1 20 for carrying out the method of the Invention comprises an induction coil 1 of an inside with fluid 45, 45 'cooled, current-carrying conductor 2 with a number of turns 3 along a vertical axis y-y with respect to the coil length L relatively small winding diameter D in a refractory molding 24.
  • the molding 24 has a closed bottom 15 and takes to form a tubular Cavity in the form of a sleeve 24 and release of vertical cooling channels 9 the Induction coil 1 interchangeable.
  • the sleeve or wall 24 of the heating element 20 consists of a to the electromagnetic alternating field of the induction coils 1 coupling refractory material (See, for example, EP 0 526 718 B1).
  • the heat transfer takes place via Heat conduction from the wall 20 in the melt 10.
  • the Melt 10 via a change of the induced alternating field by direct Coupling heat to be supplied. Due to special properties the sleeve material 24 can this without external heating and without presence be inductively heated by surrounding coupling material.
  • Fig. 1 further shows a section of a manifold 11 with therein contained molten steel melt 10 and a layer of slag floating thereon 22.
  • the material of the sleeve 24 is opposite to the molten steel 10th is largely inert, but is in the slag layer 22 with an additional Slag protection jacket 25 against mechanical and chemical Reinforced wear.
  • the bottom of the distributor 11 is made of a steel jacket 19 formed with a refractory lining 21.
  • the controllable feeder of AC to induction coil 1 is symbolically marked 33.
  • FIG. 2a shows the heating element 20 with slag protection jacket 25 and media connections 18 and 33 in conjunction with a manipulator 16.
  • the manipulator 16 comprises a guide column 34 on a steel frame 32 with a rotatable and liftable sleeve 43 and is on the rod arms 23 with the Heating rod 20 hinged.
  • the manipulator 16 has on the one hand Lifting and lowering device 26 in the form of a hydraulic element, and on the other a hydraulically operable device 27 for pivoting the linkage arms 23rd
  • An alternative device has a fixed guide 35 on a steel frame 32 on which a between guide rollers in vertical Direction movable and also pivotable support member 36 receives.
  • the numbers 26 and 27 indicate the required lifting or lowering Manipulators.
  • the immersed in the melt 10 heating rod 20 or Bankstab weakness according to the figures 3 to 5 is assigned a respective temperature sensor 28 and with a signal line 29 of a computing unit 30 aufschaltbar, via control lines 31, the movements of the manipulator 16 and the current 33rd for controlling the alternating electromagnetic field in accordance with Temperaturmeßhong the melt 10 controls or regulates. This is in the corresponding Control scheme in Fig. 3a indicated in principle.
  • the arithmetic unit 30 compares the measured values with the nominal value specifications and, if appropriate, with Deviations, the heating power of the heating elements 20 is controlled.
  • the arithmetic unit 30 with control lines 31, the cooling fluid supply for the internal cooling of the conductors and the fluid cooling of the heating rods 20 monitored by the cooling fluid supply line 39 and theméfluidanschiuß 18 and be controlled, whereby the heating rods 20 and the melt 10 at Overheating heat can be withdrawn.
  • Fig. 3a further shows an elongated design of the manifold 11 with an inlet 12 for liquid steel and an adjustable drain 13. Between inlet 12 and drain 13, at least one temperature sensor 28 is arranged and over the Signal line 29 connected to the arithmetic unit. To the preferred flow line the molten metal is in the distributor or Tundish 11 an intermediate wall 37 arranged with through-flow openings, creating a better Flow distribution around the heating rods 20 for more uniform heat dissipation. or supply according to the plan view in Fig. 3b is achieved.
  • Figs. 4a and 4b is another embodiment of the manifold 11 with karangeredem Feed 12 for the melt and two laterally arranged controllable Outlets 13 shown. Due to the multiple arrangement of individual controllable heating rods 20 or Bankstab phenomenon and the associated temperature sensors 28, is an even more accurate monitoring of the melt temperature in the distributor 11 possible.
  • FIGS. 5a and 5b show an embodiment of the distributor 11 in L-shape. Between the inlets 12 and the drains 13 is between two each Temperature sensors 28 an arrangement of two heating rods 20 is provided. These are articulated articulated link arms 23 with the manipulator 16th connected and thus in both the vertical and in the horizontal direction hubund rotatably arranged.
  • the manipulator 16 is by a frame 41 with the casting platform 40 of the continuous casting firmly connected.
  • the arrangement shows otherwise, similar to FIGS. 2a and 2b, lifting and pivoting devices 27 for positioning the heating rods 20 within the melt 10 in the manifold 11th
  • the method according to the invention and the trained for its implementation Device according to FIGS. 1 to 5 optimally fits the constructive Conditions of corresponding distributor forms and other casting platform assemblies on. This is a simple retrofitting of existing systems possible with the device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • General Induction Heating (AREA)
  • Continuous Casting (AREA)
  • Noodles (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Furnace Details (AREA)
EP00901067A 1999-01-13 2000-01-07 Verfahren und vorrichtung zum einstellen und/oder halten der temperatur einer schmelze, bevorzugt einer stahlschmelze beim stranggiessen Expired - Lifetime EP1140391B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19900915 1999-01-13
DE19900915A DE19900915A1 (de) 1999-01-13 1999-01-13 Verfahren und Vorrichtung zum Einstellen und/oder Halten der Temperatur einer Schmelze, bevorzugt einer Stahlschmelze beim Stranggießen
PCT/EP2000/000058 WO2000041829A1 (de) 1999-01-13 2000-01-07 Verfahren und vorrichtung zum einstellen und/oder halten der temperatur einer schmelze, bevorzugt einer stahlschmelze beim stranggiessen

Publications (2)

Publication Number Publication Date
EP1140391A1 EP1140391A1 (de) 2001-10-10
EP1140391B1 true EP1140391B1 (de) 2003-06-18

Family

ID=7894065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00901067A Expired - Lifetime EP1140391B1 (de) 1999-01-13 2000-01-07 Verfahren und vorrichtung zum einstellen und/oder halten der temperatur einer schmelze, bevorzugt einer stahlschmelze beim stranggiessen

Country Status (13)

Country Link
US (1) US6474404B1 (pt)
EP (1) EP1140391B1 (pt)
JP (1) JP2002534271A (pt)
KR (1) KR100653556B1 (pt)
CN (1) CN1227084C (pt)
AT (1) ATE243083T1 (pt)
AU (1) AU2106100A (pt)
BR (1) BR0007512A (pt)
CA (1) CA2359339A1 (pt)
DE (2) DE19900915A1 (pt)
EA (1) EA003040B1 (pt)
MX (1) MXPA01007179A (pt)
WO (1) WO2000041829A1 (pt)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10035097A1 (de) * 2000-07-17 2002-02-07 Didier Werke Ag Heizvorrichtung mit Inneninduktor
TW200427972A (en) * 2003-02-20 2004-12-16 Vesuvius Crucible Co Submerged sensor in metallurgical vessel
FR2875513B1 (fr) * 2004-09-21 2006-12-08 Electricite De France Procede de protection d'une gaine en ceramique de thermoplongeur, pour bain metallique non ferreux, et thermoplongeur equipe d'un dispositif de protection de sa gaine
CN103338542A (zh) * 2013-07-02 2013-10-02 艾科斯（厦门）精密机械有限公司 电磁内置式加热装置
CN106077598A (zh) * 2016-04-26 2016-11-09 重庆大学 一种铝合金熔体保温浇注室的熔池温度调节装置
CN108247030B (zh) * 2018-02-08 2020-02-04 上海东震冶金工程技术有限公司 一种智能带自学习功能连铸中间包感应加热控制方法
CN113319130B (zh) * 2021-06-29 2022-03-15 燕山大学 连轧板材温度控制方法及装置
JP7005069B1 (ja) * 2021-08-19 2022-02-14 株式会社センリョウ プラズマ加熱装置

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Publication number Priority date Publication date Assignee Title
SE415535B (sv) * 1978-06-13 1980-10-13 Asea Ab Anordning vid kontinuerlig gjutning, sasom strenggjutning
JPS6015054A (ja) 1983-07-06 1985-01-25 Ishikawajima Harima Heavy Ind Co Ltd レ−ドル出口溶融金属温度制御装置
JPS61158350U (pt) * 1985-03-25 1986-10-01
JPH0224510Y2 (pt) * 1985-07-10 1990-07-05
JPS62203666A (ja) * 1986-02-28 1987-09-08 Kurosaki Refract Co Ltd 溶融金属注入用ノズル及びその製造方法
JPH02207949A (ja) * 1989-02-09 1990-08-17 Sumitomo Heavy Ind Ltd タンディッシュ内の溶湯温度制御装置
JPH02263544A (ja) * 1989-04-04 1990-10-26 Aichi Steel Works Ltd 金属溶湯浸漬用ヒータ装置
JPH02263545A (ja) * 1989-04-04 1990-10-26 Sumitomo Metal Ind Ltd タンデッシュ内溶融金属の加熱装置
JPH0673723B2 (ja) * 1989-10-02 1994-09-21 住友金属工業株式会社 タンディッシュ精錬装置
JP2969731B2 (ja) 1990-02-20 1999-11-02 日本鋼管株式会社 タンディッシュ内溶鋼の加熱方法
US5084089A (en) * 1990-02-21 1992-01-28 Julian Zekely Method for in-line induction heating of molten metals for supplying continuous casting devices
JPH0639503A (ja) * 1991-06-27 1994-02-15 Aichi Steel Works Ltd 連続鋳造工程における溶鋼制御加熱方法
JPH0679422A (ja) * 1991-07-29 1994-03-22 Kawasaki Steel Corp タンディッシュ内溶鋼温度の連続測定方法
US5902509A (en) * 1995-07-25 1999-05-11 Dider-Werke Ag Method and apparatus for inductively heating a refractory shaped member
DE19526970C2 (de) 1995-07-25 2000-11-16 Didier Werke Ag Verfahren zum induktiven Aufheizen eines feuerfesten Formteils
CA2181215A1 (en) * 1995-08-28 1997-03-01 Raimund Bruckner Method of operating an inductor and inductor for carrying out the method
US6043472A (en) * 1996-08-28 2000-03-28 Didier-Werke Ag Assembly of tapping device and inductor therefor
DE19752548A1 (de) 1997-11-27 1999-06-10 Schloemann Siemag Ag Verfahren zur Vorrichtung zum Einstellen und Halten der Temperatur einer Stahlschmelze beim Stranggießen

Also Published As

Publication number Publication date
KR20010101431A (ko) 2001-11-14
CN1352582A (zh) 2002-06-05
MXPA01007179A (es) 2005-07-01
BR0007512A (pt) 2001-11-20
EP1140391A1 (de) 2001-10-10
EA200100769A1 (ru) 2002-04-25
KR100653556B1 (ko) 2006-12-04
DE19900915A1 (de) 2000-07-20
US6474404B1 (en) 2002-11-05
CA2359339A1 (en) 2000-07-20
DE50002580D1 (de) 2003-07-24
JP2002534271A (ja) 2002-10-15
WO2000041829A1 (de) 2000-07-20
AU2106100A (en) 2000-08-01
EA003040B1 (ru) 2002-12-26
CN1227084C (zh) 2005-11-16
ATE243083T1 (de) 2003-07-15

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