[go: up one dir, main page]

EP0321861A2 - Récipient basculant métallurgique - Google Patents

Récipient basculant métallurgique Download PDF

Info

Publication number
EP0321861A2
EP0321861A2 EP88120984A EP88120984A EP0321861A2 EP 0321861 A2 EP0321861 A2 EP 0321861A2 EP 88120984 A EP88120984 A EP 88120984A EP 88120984 A EP88120984 A EP 88120984A EP 0321861 A2 EP0321861 A2 EP 0321861A2
Authority
EP
European Patent Office
Prior art keywords
vessel
vessel according
tap opening
lance
blowing device
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Withdrawn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
EP88120984A
Other languages
German (de)
English (en)
Other versions
EP0321861A3 (fr
Inventor
Peter Dr.-Ing. Meierling
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.)
Vodafone GmbH
Original Assignee
Fried Krupp AG
Mannesmann 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 Fried Krupp AG, Mannesmann AG filed Critical Fried Krupp AG
Publication of EP0321861A2 publication Critical patent/EP0321861A2/fr
Publication of EP0321861A3 publication Critical patent/EP0321861A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/159—Equipment for removing or retaining slag for retaining slag during the pouring of the metal or retaining metal during the pouring of the slag
    • 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
    • B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/19—Arrangements of devices for discharging

Definitions

  • the invention relates to a tiltable metallurgical vessel, in particular an electric arc furnace, with a round or oval horizontal cross section and a tapping opening arranged laterally in the bottom and closable from the outside.
  • the invention has for its object to show a way with which the slag is prevented from being entrained when tapping in a tiltable metallurgical vessel of the type mentioned at the beginning.
  • a device for closing the tap hole in the bottom of a metallurgical vessel is also previously known (US Pat. No. 4,079,918), in which the slag is retained after the molten metal has flowed out by blowing a compressed gas through the closure body of the tap hole.
  • the invention makes no use of such a procedure, which is also complex and, above all, very unsafe.
  • the invention not only brings the advantage of a completely slag-free tapping for the first time, but also prevents the tapping opening from slagging in the known vessels with bottom tapping.
  • the invention can be implemented in various ways.
  • the slag can be blown away by introducing a gas above and / or below the melt.
  • the gas can be generated by a burner, thereby freezing the melt even at a low level Melting bath depth or a small melt volume in a projection of the furnace is prevented.
  • a gas is blown in below the metal bath surface, temperature homogenization is achieved by circulation through the ascending gases, and this likewise prevents the melt from cooling in the area above the tap opening.
  • An inert gas primarily argon or nitrogen, can be used as the gas. The pressure and the amount of gas are adjusted so that the slag above the tap opening is completely displaced.
  • the design of the vessel with a round or oval cross section that is to say without a lateral projection, has the particular advantage that the temperature cooling in this oriel is eliminated, that the shift in the center of gravity which generates an additional tilting moment when parting off is reduced and that the vessel is compared with a Projection equipped vessels is made easier.
  • the vessel preferably has a lower part provided with refractory lining and an attached, water-cooled upper part, which does not come into contact with the molten metal even when tapping.
  • the blowing device above the melt is preferably arranged in the side wall of the vessel in the area between the lower part and the attached water-cooled upper part of the vessel, the inclination being adjusted so that the position the blowing device, preferably a burner, is set approximately horizontally at the maximum tilt angle of the vessel.
  • the blowing device can also be arranged such that it can be lowered so that it can be tracked even after a maximum tilting angle of the vessel has been reached so that blowing can always be carried out against the slag near the surface of the molten metal.
  • Another advantage of the invention is that round oven vessels already in operation, e.g. are equipped with a pouring spout, can be converted for the implementation of the new process without significant effort. This is especially true because no changes need to be made to the equipment and connection parts of the furnace vessel.
  • the new vessel can be used for all metallurgical processes in question, primarily the manufacture of the various steels, in particular in an electric arc furnace, is provided.
  • the vessel 1 has a trough-like lower part 2, which is round in horizontal cross section and lined with refractory material, onto which an upper part 4 consisting of water-cooled elements and provided with a slag door 3 is placed.
  • the lower part 2 has a downwardly curved base 5 and a subsequent annular side wall 6, which is raised on the rack side.
  • a tapping opening 7 which is inclined downwards by approximately 50 ° - measured from the horizontal - and is lined by annular inserts 8 which are fastened by mounting elements (not shown).
  • the tap opening 7 is from the outside of the vessel can be closed by a laterally pivotable plate 9 mounted on the furnace wall.
  • the swivel flap 9 is in the closed position, the tap opening being filled with a sand filling compound.
  • a lance-like burner 10 in the side wall 6, which is arranged in the vertical tilting plane of the vessel with an inclination of approximately 15 ° so that its axis faces the surface of the molten metal 11 on which a layer of slag 12 floats is directed.
  • Fig. 2 shows the vessel 1 during the tapping process and in a position tilted by approximately 15 °.
  • the swivel plate 9 is opened so that the liquid metal pushes the filling compound out of the tap opening 7 and can flow into a pan 13 below.
  • the tilting process is controlled during emptying so that the mouth of the burner 10 is always a certain amount above the surface of the molten metal 11, so that the flame effectively blows against the slag layer 12 and pushes it back out of the area above the tap opening 7, as from Fig. 2 can be seen.
  • the flame counteracts cooling of the melt in the tapping area.
  • the vessel After emptying the vessel 1 except for a remainder, the vessel is pivoted back beyond the horizontal position shown in FIG. 1 to a position in which the melt no longer reaches the tap opening 7. Since there is no slag when swiveling back in the tapping area, the slag will also flow out effectively prevented by the tap hole. The remaining melt forms a so-called sump for the next batch to be melted down.
  • the tap opening 7 is filled with the sand filling compound from below.
  • the filling compound has been made manageable by means of a cartridge-like sleeve.
  • the cartridge-like sleeve expediently consists of cardboard and has sufficient play for insertion relative to the inside diameter of the tap opening 7.
  • the tap opening 7 is closed again from the outside by the pivoting flap 9 and the vessel is pivoted into the normal position.
  • the cardboard of the sleeve burns only in part without in any way impairing the sealing of the tap opening 7, since the sand fills the space of the burned cardboard again.
  • FIGS. 3 and 4 differs from the previous embodiment only in that in the side wall 6 directly above the tap hole 7, a sink device 14 is installed perpendicular to the side wall, which in a known manner from a suitable porous mass, for. B. a ceramic mass, existing insert through which an inert gas is introduced into the molten metal 11 during tapping, as shown in Fig. 4.
  • a suitable porous mass for. B. a ceramic mass, existing insert through which an inert gas is introduced into the molten metal 11 during tapping, as shown in Fig. 4.
  • the slag located above the sink device and thus simultaneously above the tap opening 7 is displaced from this area by appropriate metering of the inert gas.
  • tapping is ongoing in the same way as in the previous embodiment.
  • the burner 10 which can be operated with solid, liquid and gaseous fuels
  • another blowing device which can be operated with a different gas can also be used.
  • a sink device and a blowing device are used simultaneously - as indicated in Fig. 4 by the addition of a height-adjustable lance 10 'bent downwards towards the inside of the vessel by dashed lines - it is also possible to use the sink device carbon monoxide, as it is called Exhaust gas occurs, and this is burned as it emerges from the molten metal by means of oxygen supplied by the blowing device, so that displacement of the slag and heating of the melt also take place simultaneously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
EP88120984A 1987-12-22 1988-12-15 Récipient basculant métallurgique Withdrawn EP0321861A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3743575 1987-12-22
DE19873743575 DE3743575A1 (de) 1987-12-22 1987-12-22 Verfahren zum abstechen einer metallschmelze und metallurgisches gefaess zur durchfuehrung des verfahrens

Publications (2)

Publication Number Publication Date
EP0321861A2 true EP0321861A2 (fr) 1989-06-28
EP0321861A3 EP0321861A3 (fr) 1990-01-24

Family

ID=6343298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120984A Withdrawn EP0321861A3 (fr) 1987-12-22 1988-12-15 Récipient basculant métallurgique

Country Status (5)

Country Link
EP (1) EP0321861A3 (fr)
AU (1) AU2668888A (fr)
BR (1) BR8806779A (fr)
DE (1) DE3743575A1 (fr)
ZA (1) ZA889505B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685000A4 (fr) * 1991-10-15 1997-05-02 Ltv Steel Co Inc Procede et installation pour le coulage sans scorie de metaux.
WO2000061823A1 (fr) * 1999-04-10 2000-10-19 Sms Demag Aktiengesellschaft Procede et dispositif pour faire couler une matiere fondue metallique contenue dans des cuves metallurgiques
EP1136157A1 (fr) * 2000-03-24 2001-09-26 SMS Demag AG Procédé et dispositif pour la coulée d'un métal liquide exempt de scories à partir de récipients métallurgiques
US7056916B2 (en) 2002-11-15 2006-06-06 Boehringer Ingelheim Pharma Gmbh & Co. Kg Medicaments for the treatment of chronic obstructive pulmonary disease
CN108027205A (zh) * 2015-07-10 2018-05-11 沙特基础全球技术有限公司 具有成角度的偏心底出钢口的电弧炉和使用所述电弧炉的出炉工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10117181C1 (de) * 2001-04-05 2002-10-31 Georgsmarienhuette Gmbh Verfahren und Vorrichtung zur Verhinderung des Mitfließens von Schlacke beim Abstich einer Stahlschmelze
CN116274883B (zh) * 2023-05-17 2023-08-04 山西中设华晋铸造有限公司 一种用于车辆履带的合金钢铸造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE402667A (fr) *
DE1852833U (de) * 1958-03-27 1962-06-07 Demag Ag G M B H Vorrichtung an kippbaren konvertern oder trommeloefen.
US3761242A (en) * 1958-12-02 1973-09-25 Finkl & Sons Co Method of treating molten metal by gas purging rhtough a porous plug
LU61204A1 (fr) * 1970-06-26 1972-03-24
DE2611203B1 (de) * 1976-03-17 1977-09-29 Hoesch Werke Ag Verfahren zum abschlacken von metallschmelzen
AT350090B (de) * 1975-12-17 1979-05-10 Voest Ag Verfahren und einrichtung zum verschliessen des stichloches eines metallurgischen gefaesses
AT384242B (de) * 1982-09-07 1987-10-12 Radex Austria Ag Verfahren zum abstechen bzw. abgiessen von metallschmelzen
DE3321576A1 (de) * 1983-06-15 1984-12-20 Mannesmann AG, 4000 Düsseldorf Verfahren zum betreiben eines metallurgischen schmelzofens und metallurgischer schmelzofen
DE8530922U1 (de) * 1985-10-31 1985-12-19 Badische Stahlwerke AG, 7640 Kehl Metallschmelzofen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685000A4 (fr) * 1991-10-15 1997-05-02 Ltv Steel Co Inc Procede et installation pour le coulage sans scorie de metaux.
WO2000061823A1 (fr) * 1999-04-10 2000-10-19 Sms Demag Aktiengesellschaft Procede et dispositif pour faire couler une matiere fondue metallique contenue dans des cuves metallurgiques
EP1136157A1 (fr) * 2000-03-24 2001-09-26 SMS Demag AG Procédé et dispositif pour la coulée d'un métal liquide exempt de scories à partir de récipients métallurgiques
US6500382B2 (en) 2000-03-24 2002-12-31 Sms Demag Ag Method and apparatus for slag-free teeming of metal melt from a metallurgical melt vessel
US7056916B2 (en) 2002-11-15 2006-06-06 Boehringer Ingelheim Pharma Gmbh & Co. Kg Medicaments for the treatment of chronic obstructive pulmonary disease
CN108027205A (zh) * 2015-07-10 2018-05-11 沙特基础全球技术有限公司 具有成角度的偏心底出钢口的电弧炉和使用所述电弧炉的出炉工艺

Also Published As

Publication number Publication date
BR8806779A (pt) 1989-08-29
EP0321861A3 (fr) 1990-01-24
ZA889505B (en) 1989-09-27
AU2668888A (en) 1989-06-22
DE3743575A1 (de) 1989-07-13

Similar Documents

Publication Publication Date Title
DE2944269C3 (de) Ofengefäß eines kippbaren Lichtbogenofens
EP1181491B1 (fr) Cuve metallurgique dotee d'un dispositif de coulee et procede de soutirage commande et sans scories de metal liquide de cette cuve
DE8231869U1 (de) Kippbarer Lichtbogenofen
AT395656B (de) Anlage zur herstellung von fluessigen metallen
DE1433431A1 (de) Schmelzofen zur Herstellung von Stahl und Verfahren zum Betrieb des Ofens
DE2065105C3 (de) Metallurgischer Ofen
DE1294982B (de) Kontinuierliches Frischverfahren und Vorrichtung zum Frischen einer Metallschmelze
EP0321861A2 (fr) Récipient basculant métallurgique
EP0180741A1 (fr) Procédé et dispositif pour maintenir ou élever la température d'un bain métallique
US2718389A (en) Skimmer for holding slag back during pouring metal
DE69409749T2 (de) Elektroofen zum schmelzen von schrott
DE4445783A1 (de) Kippbares metallurgisches Aggregat
EP0105866B1 (fr) Four de fusion à plasma
EP0160185A1 (fr) Carcasse de four basculant métallurgique
DE3327671C2 (de) Einrichtung zum weitestgehend schlackenfreien Abstechen von Metalschmelzen, insbesondere von Stahlschmelzen, aus metallurgischen Gefäßen
EP1432834B1 (fr) Procede pour faire fonctionner un four a arc basculant en décharge
EP0003037A1 (fr) Procédé, dispositif et agent pour le traitement de masses fondues de fer avec des morceaux de métaux alcalins ou alcalino-terreux purs
DE10223906A1 (de) Lichtbogenofen und Verfahren zum Betreiben des Lichtbogenofens
DE3840486A1 (de) Ofenanlage zum einschmelzen von schrott
DE2730973A1 (de) Drehkonverter zum gleichzeitigen erhitzen und blasen
DE879149C (de) Kippbarer Niederfrequenzinduktionsofen, insbesondere fuer Leichtmetalle
DE3490299C2 (fr)
EP2095051B1 (fr) Récipient métallurgique, en particulier four à arc
CH602235A5 (en) Casting ladle with bottom pour stopper
DE4009291C2 (fr)

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE DE FR GB IT NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB IT NL

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MANNESMANN AKTIENGESELLSCHAFT

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19900725