EP0152849B1 - Giesspfanne oder Zwischenpfanne - Google Patents

Giesspfanne oder Zwischenpfanne Download PDF

Info

Publication number
EP0152849B1
EP0152849B1 EP85101148A EP85101148A EP0152849B1 EP 0152849 B1 EP0152849 B1 EP 0152849B1 EP 85101148 A EP85101148 A EP 85101148A EP 85101148 A EP85101148 A EP 85101148A EP 0152849 B1 EP0152849 B1 EP 0152849B1
Authority
EP
European Patent Office
Prior art keywords
ladle
reinforcement
wires
metallic
casting ladle
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
Application number
EP85101148A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0152849A3 (en
EP0152849A2 (de
Inventor
Hans Gunnar Larsson
Erik Westman
Artur Östlund
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Publication of EP0152849A2 publication Critical patent/EP0152849A2/de
Publication of EP0152849A3 publication Critical patent/EP0152849A3/de
Application granted granted Critical
Publication of EP0152849B1 publication Critical patent/EP0152849B1/de
Expired legal-status Critical Current

Links

Images

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
    • B22D41/02—Linings

Definitions

  • the present invention relates to a ladle or tundish according to the preamble of claim 1.
  • a ladle with these features is known, for example, from GB-A-493 892.
  • a tundish is understood to be a pan with bottom filling (“tundish •).
  • induction-heated pans In the case of induction-heated pans, one wants to achieve that the greatest possible proportion of the power of the induction coils arranged outside the pan is converted in the melt, and one wants to avoid that a large part of this power is converted into heat in the walls of the pan, the lining, etc. is implemented. If one were to use an induction coil fed with a single-phase, mains-frequency current in a pan with a metallic, for example stainless, lining or jacket, excessive losses in the jacket would occur. One would also like to avoid excessive temperatures on the outside of the pan, since this can cause damage to the surroundings, for example to the induction coil. At the same time, you want to keep the dimensions of the pan and its walls small.
  • GB-A-493 892 it is known to provide, in the case of a pan with an induction coil in the lining, a screen made of electrically conductive wires or rods which are electrically connected in series with one another and arranged in a zigzag arrangement of the individual wire sections to each other around the entire pan, but without forming a closed electrical circuit around the melt.
  • This shield is connected to one pole of an electrical monitoring arrangement, the other pole of which is connected to the melt.
  • the purpose of the screen is to detect severe damage to the inside of the lining in that the screen comes into contact with the melt at the damaged point.
  • the electrically conductive shield consists of a plurality of electrical conductors arranged parallel to one another on a circumferential circle, which are connected in the circumferential direction alternately to an upper or lower busbar, the two busbars being connected to an electrical monitoring arrangement.
  • the invention has for its object to develop a ladle or a ladle in which the magnetic field of the induction coil in the wall of the pan causes as little heat loss as possible, the outer wall of the pan adopts the lowest possible temperatures and the dimensions of the pan are kept as small as possible can be.
  • the inner part 3 of the ladle consists in a known manner of a heat-insulating ceramic mass, such as Al 2 0 3 (see 4 in Figure 2), which can be surrounded by firebrick (5 in Figure 2) and insulating bricks (6 in Figure 2) .
  • a heat-insulating ceramic mass such as Al 2 0 3 (see 4 in Figure 2)
  • firebrick 5 in Figure 2
  • insulating bricks (6 in Figure 2)
  • all types of known feed masses can be used for this inner part 3.
  • An outer wall part 7, to which the invention relates directly, is arranged radially outside the inner part 3 (FIGS. 1 and 2).
  • This wall part 7 consists of a reinforcement which is embedded in the lining material and / or concrete and / or cement or ceramic material and possibly also in glass fibers (insulating fibers).
  • the outside temperature in the case of a molten steel in the ladle can be 250 degrees Celsius and the temperature drop through the wall part 7 can be 110 degrees Celsius.
  • the inner diameter of the wall part 7 can be approximately 1 m, for example.
  • Figure 3 shows an enlarged view of a detail of the outer wall part 7, which consists of an inner part 8 belonging to the wall part 7 made of A1 2 0 3 and cement and outer parts 9 made of glass fibers and cement.
  • the reinforcement of the outer wall part 7 is embedded, and this reinforcement should consist of metallic material in order to prevent breaks in the brittle material.
  • the metal of the reinforcement should be non-magnetic, but this is not absolutely necessary.
  • the specific electrical resistance of the material should be greater than that of electrical wiring material. Its coefficient of thermal expansion should be close to that applicable to concrete / cement so that no cracks occur in the concrete / cement.
  • a material based on nickel-iron can be mentioned as an example.
  • the reinforcement can consist of metal elements 10 running axially to the ladle axis, which are fastened to the flange or collar 11 of the ladle or to another metallic upper ring.
  • the metal elements should be provided without connection points or with interruptions in order to prevent the formation of closed electrical circuits, for example from flange to flange, since heat would be generated unnecessarily in these circles by their magnetic interlinking with the field 2.
  • FIG. 4 shows another embodiment of the outer wall part 7, axial reinforcement elements 10 of the type described above also being present.
  • concentric wires 12 are embedded in the mass, but have no electrical contact with the reinforcing elements 10. These wires are also "cut off” for the reason mentioned above. H. not connected in closed circles at their ends, or provided with an electrical interruption.
  • the elements (wires) 10 and 12 can be non-magnetic, but also magnetic if necessary, and their diameter is approximately 1 to 4 mm.
  • FIG. 5 shows an example of a compression diagram for a ladle at operating temperature.
  • the mechanical stress is 8, in MPa, and the distance, calculated from the inside of the wall part 7, is given in mm.
  • the diagram shows how the voltage curve 17 varies towards the outer surface.
  • Figure 6 shows a further embodiment according to the invention with an induction coil 1, a reinforced outer wall part 7 and an inner lining part 3 and an upper collar or steel part 18.
  • the bottom 19 is made of steel and the pan can be used, for example, in an atomizing system.
  • the stirring by the single-phase spread coil is repulsive (50 Hz), but the coil can alternatively also be fed in multiple phases, whereby a motor-driven stirring is obtained.
  • the same bath movement in m / s
  • a reinforced wall, as described above, corresponding to the wall part 7 can also be used in a tundish (FIG. 7A), in that a side wall 24, inside an induction coil 23, has such a reinforced wall outside a conventional lining, corresponding to FIG. 3 in Figure 1 is attached.
  • FIG. 7B An RH plant or a DH plant, see FIG. 7B, or a plant for continuous casting, see FIG. 7A, can be mentioned as examples of further possible uses of the invention.
  • a ladle without a metallic jacket with outer and inner parts (7 and 3 in Figure 1) and surrounding induction coil 1 and with bottom filling opening 20 is shown.
  • Buffer stations keeping warm when the business is interrupted), keeping warm etc. can be mentioned as further examples in addition to the previous data.
  • An induction coil 22 can be fitted around the RH system in FIG. 7B, a piece of the wall 21 being embodied within the coil according to the invention.
  • the metallic reinforcement can consist of a Ni-Fe-based material, titanium or another alloy with suitable physical properties.
  • the base material of the wall part 7, in which the reinforcing elements are embedded can alternatively be made of a metal oxide, e.g. B. AI z 0 3 , or made of a silicate, reinforced with fibers of silicon carbide, silicon nitride, glass, boron nitride, etc., and connected with cement, phosphate, silicon ester, etc.
  • a metal oxide e.g. B. AI z 0 3
  • silicate reinforced with fibers of silicon carbide, silicon nitride, glass, boron nitride, etc., and connected with cement, phosphate, silicon ester, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • General Induction Heating (AREA)
  • Furnace Details (AREA)
EP85101148A 1984-02-06 1985-02-04 Giesspfanne oder Zwischenpfanne Expired EP0152849B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8400586A SE452190B (sv) 1984-02-06 1984-02-06 Skenk eller vermare (tundish) for induktiv vermning och/eller omroring av metalliska smeltor sasom stal
SE8400586 1984-02-06

Publications (3)

Publication Number Publication Date
EP0152849A2 EP0152849A2 (de) 1985-08-28
EP0152849A3 EP0152849A3 (en) 1985-10-09
EP0152849B1 true EP0152849B1 (de) 1988-03-02

Family

ID=20354610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101148A Expired EP0152849B1 (de) 1984-02-06 1985-02-04 Giesspfanne oder Zwischenpfanne

Country Status (5)

Country Link
US (1) US4618964A (sv)
EP (1) EP0152849B1 (sv)
JP (1) JPS60187459A (sv)
DE (1) DE3561691D1 (sv)
SE (1) SE452190B (sv)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0794059B2 (ja) * 1986-01-21 1995-10-11 川崎重工業株式会社 水平連続鋳造装置
SE454208B (sv) * 1986-02-24 1988-04-11 Asea Ab Sett for avskiljning av inneslutningar i metallsmeltor samt anordning for genomforande av settet
SE457619B (sv) * 1986-02-27 1989-01-16 Asea Ab Utloppsvaermare foer skaenk eller annan matallurgisk behaallare
US5039345A (en) * 1988-04-05 1991-08-13 Advanced Metals Technology Corp. Fiber composite article and method of manufacture
US4921222A (en) * 1988-04-05 1990-05-01 Advanced Metals Technology Corp. Fiber composite article and method of manufacture
NO166750C (no) * 1989-02-02 1991-08-28 Eb National Tranformer As Skjold for elektromagnetisk omroerer.
JP2692367B2 (ja) * 1989-11-09 1997-12-17 富士電機株式会社 取鍋の浴湯加熱装置
US5192488A (en) * 1989-11-09 1993-03-09 Fuji Electric Co., Ltd. Apparatus for heating molten in a ladle
US5550353A (en) * 1990-01-31 1996-08-27 Inductotherm Corp. Induction heating coil assembly for prevent of circulating current in induction heating lines for continuous-cast products
US5416794A (en) * 1990-01-31 1995-05-16 Inductotherm Corp. Induction furnace havng a modular induction coil assembly
US5257281A (en) * 1990-01-31 1993-10-26 Inductotherm Corp. Induction heating apparatus and method
US5425048A (en) * 1990-01-31 1995-06-13 Inductotherm Corp. Heating apparatus for induction ladle and vacuum furnaces
WO1997018690A1 (en) * 1995-11-13 1997-05-22 Advanced Metals Technology Corp. Removable liners for inductive furnaces
US5880404A (en) * 1996-06-28 1999-03-09 Advanced Metals Technology Corporation Power transmission support structures
US6393044B1 (en) * 1999-11-12 2002-05-21 Inductotherm Corp. High efficiency induction melting system
DE10159306A1 (de) * 2001-12-04 2003-06-12 Induga Industrieoefen Und Gies Induktiv heizbares Gefäß für metallisches Schmelzgut und Verwendung dieses Gefäßes
US20150108325A1 (en) * 2013-10-23 2015-04-23 Keith Ryan Method and apparatus for electrically-heated refractory moulds and mandrels
AU2019325498A1 (en) * 2018-08-23 2021-03-18 Beemetal Corp. Systems and methods for continuous production of gas atomized metal powers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB493892A (en) * 1937-08-24 1938-10-17 George Donald Lee Horsburgh Improvements in or relating to electric induction furnaces
GB704960A (en) * 1950-11-01 1954-03-03 Henry Wiggin And Company Ltd Improvements to electric induction furnaces
FR2366079A1 (fr) * 1976-10-04 1978-04-28 Siderurgie Fse Inst Rech Poche metallurgique a enceinte metallique fragmentee
US4435814A (en) * 1982-01-29 1984-03-06 Bbc Brown, Boveri & Company, Limited Electric furnace having liquid-cooled vessel walls

Also Published As

Publication number Publication date
SE8400586L (sv) 1985-08-07
DE3561691D1 (en) 1988-04-07
SE452190B (sv) 1987-11-16
JPH0118827B2 (sv) 1989-04-07
SE8400586D0 (sv) 1984-02-06
EP0152849A3 (en) 1985-10-09
US4618964A (en) 1986-10-21
EP0152849A2 (de) 1985-08-28
JPS60187459A (ja) 1985-09-24

Similar Documents

Publication Publication Date Title
EP0152849B1 (de) Giesspfanne oder Zwischenpfanne
DE69512605T2 (de) Induktions-Kochmulde
DE2905553C2 (sv)
EP0379647B1 (de) Feuerfeste Verbindung sowie Induktionsspule hierfür
EP0010305B1 (de) Flüssigkeitsgekühlte Halterung für eine Elektrodenspitze
DE3709905A1 (de) Einsatz fuer einen raffinierofen
DE2127333B2 (de) Tiegel für das induktive Erwärmen von Metallen
EP0151415A2 (de) Gleichstrom-Lichtbogenofen oder Gleichstrom-Lichtbogenpfanne
DE2728262A1 (de) Ofen zum schmelzen von metallen oder metallegierungen
EP0156126B1 (de) Herdboden, besonders für Gleichstrom-Lichtbogenöfen
DE4429340C2 (de) Tiegel zum induktiven Schmelzen oder Überhitzen von Metallen, Legierungen oder anderen elektrisch leitfähigen Werkstoffen
AT392693B (de) Ausfuetterung fuer einen lichtbogenofen
EP0541044A2 (de) Gleichstrom-Lichtbogenofen
DE19515230C2 (de) Verfahren zum induktiven Aufheizen eines feuerfesten Formteils sowie ein entsprechendes Formteil
DE69124123T2 (de) Induktionsbeheizter Ofen für das Schmelzen von Metall
DE2744311C2 (de) Induktiv beheizte Gießpfanne
DE69811889T2 (de) Rinneninduktor
DE697555C (de) Hochfrequenz-Induktionsofen
DE4411591C2 (de) Bodenelektrode eines mit Gleichstrom beheizten Ofens
DE3688699T2 (de) Elektrisch leitender Ziegel.
EP0063711B1 (de) Elektrode für Lichtbogenöfen und deren Verwendung
DE1508571B1 (de) Feuerfeste Auskleidung fuer Induktionsoefen
DE69803927T2 (de) Induktionsofen zum schmelzen von metallen
EP0189108A1 (de) Heizvorrichtung, insbesondere für eine strahlungsbeheizte Kochplatte, sowie Verfahren zu ihrer Herstellung
DE4402500C2 (de) Gießkokille

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19860226

17Q First examination report despatched

Effective date: 19861016

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 3561691

Country of ref document: DE

Date of ref document: 19880407

ITF It: translation for a ep patent filed
ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19900227

Year of fee payment: 6

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19910228

Ref country code: CH

Effective date: 19910228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950125

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950209

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950210

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960204

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19961031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19961101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST