EP0097610A1 - Verfahren und Einrichtung zum Entleeren von metallurgischen Gefässen - Google Patents

Verfahren und Einrichtung zum Entleeren von metallurgischen Gefässen Download PDF

Info

Publication number
EP0097610A1
EP0097610A1 EP83630104A EP83630104A EP0097610A1 EP 0097610 A1 EP0097610 A1 EP 0097610A1 EP 83630104 A EP83630104 A EP 83630104A EP 83630104 A EP83630104 A EP 83630104A EP 0097610 A1 EP0097610 A1 EP 0097610A1
Authority
EP
European Patent Office
Prior art keywords
plug
container
taphole
tap hole
slag
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.)
Granted
Application number
EP83630104A
Other languages
English (en)
French (fr)
Other versions
EP0097610B1 (de
Inventor
François Schleimer
Jean Goedert
Ferdinand Goedert
Romain Henrion
Ferdinand Thill
Henri Klein
Jean-François Liesch
Jean Peckels
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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
Priority claimed from LU84213A external-priority patent/LU84213A1/fr
Priority claimed from LU84237A external-priority patent/LU84237A1/de
Application filed by Arbed SA filed Critical Arbed SA
Priority to AT83630104T priority Critical patent/ATE20440T1/de
Publication of EP0097610A1 publication Critical patent/EP0097610A1/de
Application granted granted Critical
Publication of EP0097610B1 publication Critical patent/EP0097610B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4653—Tapholes; Opening or plugging thereof
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor

Definitions

  • the present invention relates to a method and a device for emptying tilting metallurgical vessels, in particular steelworks converters, comprising a tap hole arranged in the side wall and containing molten metal on which slag is swimming.
  • DE-OS 26 39 712 discloses a taphole closing device comprising a closing body which can be inserted into the poured hole which leaves an annular slot free relative to the wall of the taphole and which contains a pressurized gas line.
  • the closure body has an outer wall which tapers towards the orifice of the pressurized gas line. The slag is forced back into the container under the effect of the gas flow.
  • This device which is subject to significant wear in large converters, has been improved (see EP 10.082) in that the external lateral surface of the shutter consists of a surface in the form of a spherical cap which , on the side of the mouth, turns into a frusto-conical surface.
  • the shutter is made of gray cast iron. Both devices have the disadvantage that they require large quantities of gas to seal the taphole. In addition, there are problems of blockage of the mouth of the gas pipe of the shutter.
  • the object of the present invention is to provide a remedy for the drawbacks described, and to eliminate in a large proportion the entrainment of slag when emptying metallurgical vessels.
  • the method according to the invention which is characterized in that it ensures, at the latest after the end of metallurgical operations, the sealed closure of the taphole using a plug capable of being attacked by the molten mass, in that the container is tilted, in that a bubbling gas is introduced around the taphole in the container through permeable elements, in that the closing hole is closed pouring using a new stopper as soon as the first slag elements are found and the container is tilted to the starting position.
  • a bubbling gas is introduced around the taphole in the container through permeable elements
  • the closing hole is closed pouring using a new stopper as soon as the first slag elements are found and the container is tilted to the starting position.
  • Fig. 1 part of a refining crucible 1 whose tap hole 2 is closed by a plug 3.
  • the plug 3 is mounted on an arm 4, which pivots about an axis 5 fixed on the wall of the tap hole .
  • the arm 4 is provided with a stop 6. (The counter-stop mounted on the wall of the converter is not shown).
  • a hydraulic cylinder 7, operable in both directions, acts by means of a rod 8 and a fork 9 on the arm 4.
  • the cylinder 7 can pivot around an axis integral with the wall of the converter.
  • the plug 3 has the shape of a truncated cone, slightly chamfered.
  • the large base of the truncated cone has a cylindrical recess 14 in which is received a lug mounted on the arm 4 (see also Fig. 2).
  • the plug which is held on the lug by friction is preferably made of an inexpensive, easily machinable and relatively soft material such as wood, preferably fir.
  • the surface of the plug is advantageously covered with a de- refractory material layer.
  • Two elements 10 permeable to a bubbling agent are located on either side of the tap hole 2 (see FIG. 3). The optimal place where these elements are placed is preferably determined experimentally for each converter. By positioning them about 0.5 m from the axis of the tap hole, we obtained the expected result for our 150-ton converter.
  • Permeable elements suitable for implementing the invention have been described in patents LU 82.552, LU 82.553, LU 82.554. They consist of several neighboring elongated segments, of rectangular section, surrounded by a metal box. On the cold side of the permeable element 10, a distribution chamber 11 is welded to the walls of the box. Conduits 12 connect this chamber 11 to a source 13 of bubbling agent. The bubbling fluid is passed at the interface of the different segments. It follows that the permeable elements 10 create a well distributed flow of fluid.
  • a tube 20 is fixed, onto which a base 16 is welded, on the arm 4.
  • a bolt 18 screwed into a ball joint 15 provided with the stopper lug ensures, by through the spring 17 and the washer 19, the bearing of the ball joint 15 on the base 16.
  • the jack 7 can be kept in the extended position, as shown in FIG. 1, to ensure that the plug 3 is held in the mouth of the taphole 2.
  • the taphole is preferably always closed, except during the pouring operation. This limits heat loss and avoids the escape of flame and slag during blowing.
  • the jack 7 withdraws the arm 4 until it stops.
  • the plug 3 remains stuck in the tap hole 2.
  • the liquid mass comes into contact with the plug during the tilting and destroys it in a few seconds. At this time the converter is in such a position that only metal is in the immediate vicinity of the tap hole.
  • a new plug 3 is positioned on the lug of the arm 4.
  • the jack 7 is pressurized and the plug 5 is pressed into the tap hole.
  • the plug has a reduced mass, the closure is therefore quick.
  • the position of the shutter is preferably adjustable on the axis of the tap hole. It is also noted that since the plug remains stuck respectively held in the taphole between two emptying operations, the use of a second plug is superfluous.
  • the bubbling agent is usefully a neutral gas such as argon, nitrogen or possibly carbon dioxide.
  • a gas flow of 2-3 Nm 3 / h eure ensures the permeability of the refractory elements.
  • the gas flow rate is increased to reach 5-10 Nm 3 / hour. Note here that higher flow rates cause projections, which mix with the slag and which are then entrained with them towards the tap hole.
  • an improvement in the ferro-manganese yield ranging from 3 to 7% has been observed for semi-quenched steels, which is equivalent on average to a saving of 0.35 kg / t steel .
  • the number of flows with high rephosphorization, on the order of 0.025 XP decreased by more than half, while those with low rephosphorization, on the order of 0.002% P, easily doubled.
  • the invention has been described and shows the most convincing advantages in relation to a tilting crucible, it can also be used with static metallurgical vessels having a tap hole provided in the bottom.
  • the number of permeable elements need not necessarily be taken to be two, and the bubbling gases suitable for implementing the invention are not only argon, nitrogen or carbon dioxide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP83630104A 1982-06-18 1983-06-15 Verfahren und Einrichtung zum Entleeren von metallurgischen Gefässen Expired EP0097610B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83630104T ATE20440T1 (de) 1982-06-18 1983-06-15 Verfahren und einrichtung zum entleeren von metallurgischen gefaessen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
LU84213 1982-06-18
LU84213A LU84213A1 (fr) 1982-06-18 1982-06-18 Dispositif pour vidanger des recipients metallurgiques
LU84237A LU84237A1 (de) 1982-06-29 1982-06-29 Vorrichtung zum verschliessen des abstichloches eines metallurgischen gefaesses
LU84237 1982-06-29

Publications (2)

Publication Number Publication Date
EP0097610A1 true EP0097610A1 (de) 1984-01-04
EP0097610B1 EP0097610B1 (de) 1986-06-18

Family

ID=26640291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83630104A Expired EP0097610B1 (de) 1982-06-18 1983-06-15 Verfahren und Einrichtung zum Entleeren von metallurgischen Gefässen

Country Status (15)

Country Link
EP (1) EP0097610B1 (de)
KR (1) KR840005172A (de)
AR (1) AR230796A1 (de)
AU (1) AU1591983A (de)
BR (1) BR8303246A (de)
CA (1) CA1206752A (de)
DD (1) DD209851C4 (de)
DE (1) DE3364174D1 (de)
DK (1) DK280383A (de)
ES (1) ES523380A0 (de)
FI (1) FI831964L (de)
HU (1) HU187104B (de)
IN (1) IN157657B (de)
NO (1) NO832200L (de)
PT (1) PT76879B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081759A1 (de) * 2001-04-05 2002-10-17 Georgsmarienhütte Gmbh Verfahren und vorrichtung zur verhinderung des mitfliessens von schlacke beim abstich einer metallschmelze

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4211598C1 (de) * 1992-04-07 1993-01-14 Oesterreichische Magnesit Ag, Radenthein, Kaernten, At

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2514218B2 (de) * 1974-04-08 1976-09-02 Salvagnini, Mirella, Padua (Italien) Auslassvorrichtung mit beweglichem stopfen zur kontrolle des flusses geschmolzener metalle aus entsprechenden behaeltern
DE2724227A1 (de) * 1976-07-06 1978-01-19 Daussan Vorrichtung zum verschluss der giessoeffnung eines behaelters zum umfuellen von geschmolzenem metall
EP0043338A1 (de) * 1980-06-25 1982-01-06 Arbed S.A. Feuerfeste, gasdurchlässige Baukörper
EP0043787A1 (de) * 1980-07-09 1982-01-13 Arbed S.A. Feuerfeste, gasdurchlässige Baukörper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2514218B2 (de) * 1974-04-08 1976-09-02 Salvagnini, Mirella, Padua (Italien) Auslassvorrichtung mit beweglichem stopfen zur kontrolle des flusses geschmolzener metalle aus entsprechenden behaeltern
DE2724227A1 (de) * 1976-07-06 1978-01-19 Daussan Vorrichtung zum verschluss der giessoeffnung eines behaelters zum umfuellen von geschmolzenem metall
EP0043338A1 (de) * 1980-06-25 1982-01-06 Arbed S.A. Feuerfeste, gasdurchlässige Baukörper
EP0043787A1 (de) * 1980-07-09 1982-01-13 Arbed S.A. Feuerfeste, gasdurchlässige Baukörper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081759A1 (de) * 2001-04-05 2002-10-17 Georgsmarienhütte Gmbh Verfahren und vorrichtung zur verhinderung des mitfliessens von schlacke beim abstich einer metallschmelze
US6951296B2 (en) 2001-04-05 2005-10-04 Georgsmarienhütte Gmbh Method and device for preventing slag from flowing along when tapping a molten metal
CZ301430B6 (cs) * 2001-04-05 2010-02-24 Georgsmarienhütte Gmbh Zarízení k zamezení spolecného proudení strusky pri odpichu kovové taveniny

Also Published As

Publication number Publication date
DE3364174D1 (en) 1986-07-24
HU187104B (en) 1985-11-28
DK280383D0 (da) 1983-06-17
FI831964A7 (fi) 1983-12-19
DK280383A (da) 1983-12-19
KR840005172A (ko) 1984-11-05
DD209851A5 (de) 1984-05-23
NO832200L (no) 1983-12-19
FI831964L (fi) 1983-12-19
DD209851C4 (de) 1985-12-18
ES8405444A1 (es) 1984-06-01
FI831964A0 (fi) 1983-06-01
AU1591983A (en) 1983-12-22
BR8303246A (pt) 1983-12-13
IN157657B (de) 1986-05-10
ES523380A0 (es) 1984-06-01
PT76879B (fr) 1986-01-27
PT76879A (fr) 1983-07-01
AR230796A1 (es) 1984-07-31
CA1206752A (fr) 1986-07-02
EP0097610B1 (de) 1986-06-18

Similar Documents

Publication Publication Date Title
EP0048641B2 (de) Vorrichtung zum Schützen geschmolzenen Metalls in Schieberverschlüssen
FR2499229A1 (fr) Dispositif pour boucher le trou de coulee d'un recipient metallurgique
EP0094926B1 (de) Mündung zum Einführen eines Schutzgases in ein Giessrohr
LU83926A1 (fr) Procede et appareil de coulee en source d'un metal fondu
NZ241288A (en) Slag carryover prevented by floating refractory plug with mating
EP0097610B1 (de) Verfahren und Einrichtung zum Entleeren von metallurgischen Gefässen
EP0305426B1 (de) Verfahren und vorrichtung zum giessen von flüssigem metall
EP1457575B1 (de) Vorrichtung zum Beobachten von Chargiergut in einem Elektrostahlofen
LU84213A1 (fr) Dispositif pour vidanger des recipients metallurgiques
EP0270418B1 (de) Schwimmer zum Zurückhalten der Schlacke sowie Verfahren zu seiner Benutzung und Herstellung
FR2513909A1 (fr) Procede et appareil pour le traitement d'un metal liquide dans un recipient
EP0589762B1 (de) Giessrohr für Metall und Verfahren zu seiner Herstellung
CA1258170A (fr) Poches de coulee pour metal en fusion
FR2716819A1 (fr) Procédé et dispositif de coulée.
FR2728491A1 (fr) Dispositif de coulee d'un metal liquide avec injection d'un gaz inerte dans le metal liquide en cours de coulee
EP0242347A2 (de) Vorrichtung zum Giessen einer flüssig-festen Mischung
EP0302040B1 (de) Verbesserungen an Pfannen zum Giessen von Metall
EP0282824A2 (de) Vorrichtung zum Entleeren von metallurgischen Gefässen
EP0332483A1 (de) Ausgussdüse zur unterstützenden Oeffnung,Vorrichtung,die sie beinhaltet,und Verfahren zur Durchführung
EP0028569A1 (de) Verfahren zum Spülen einer Metallschmelze durch Einblasen von Gas
FR2521462A1 (fr) Dispositif d'amenee du metal dans les lingotieres de coulee continue
FR2658277A1 (fr) Recipient metallurgique equipe d'au moins une electrode traversant sa paroi.
SU1316570A3 (ru) Устройство дл запирани выпускного отверсти
FR2467651A1 (fr) Dispositif pour deboucher l'orifice de coulee d'un recipient metallurgique
EP0582496B1 (de) Innerer Ausguss aus feuerfestem Material zur Verwendung in metallurgischen Gefässen

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

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

17P Request for examination filed

Effective date: 19840620

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 20440

Country of ref document: AT

Date of ref document: 19860715

Kind code of ref document: T

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3364174

Country of ref document: DE

Date of ref document: 19860724

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: NL

Payment date: 19870630

Year of fee payment: 5

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

Ref country code: GB

Effective date: 19880615

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

Ref country code: SE

Effective date: 19880616

BERE Be: lapsed

Owner name: ARBED S.A.

Effective date: 19880630

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

Ref country code: NL

Effective date: 19890101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19890228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: BE

Effective date: 19890630

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930521

Year of fee payment: 11

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

Ref country code: AT

Payment date: 19930614

Year of fee payment: 11

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

Ref country code: AT

Effective date: 19940615

EUG Se: european patent has lapsed

Ref document number: 83630104.4

Effective date: 19890220

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

Ref country code: DE

Effective date: 19950301