EP0340711B1 - Verfahren und Vorrichtung zur Zugabe von Legierungsmitteln in einen Metallgiessstrahl - Google Patents

Verfahren und Vorrichtung zur Zugabe von Legierungsmitteln in einen Metallgiessstrahl Download PDF

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Publication number
EP0340711B1
EP0340711B1 EP89107892A EP89107892A EP0340711B1 EP 0340711 B1 EP0340711 B1 EP 0340711B1 EP 89107892 A EP89107892 A EP 89107892A EP 89107892 A EP89107892 A EP 89107892A EP 0340711 B1 EP0340711 B1 EP 0340711B1
Authority
EP
European Patent Office
Prior art keywords
converter
jet
alloying
molten metal
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.)
Expired - Lifetime
Application number
EP89107892A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0340711A3 (en
EP0340711A2 (de
Inventor
Wolfram Dr. Ing. Florin
Horst Dipl.-Ing. Kalthoff
Dieter Dr. Ing. Pflipsen
Rolf Dipl.-Ing. Höffken
Klaus Jürgen Müller
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Stahl 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 Thyssen Stahl AG filed Critical Thyssen Stahl AG
Priority to AT89107892T priority Critical patent/ATE92112T1/de
Publication of EP0340711A2 publication Critical patent/EP0340711A2/de
Publication of EP0340711A3 publication Critical patent/EP0340711A3/de
Application granted granted Critical
Publication of EP0340711B1 publication Critical patent/EP0340711B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
    • C21C7/0043—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material into the falling stream of molten metal
    • 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

Definitions

  • the invention relates to a method and an associated device for adding alloying agents into a molten metal, in particular molten steel when tapping a converter into a ladle, in which the alloying agents are brought together in the form of a jet with the pouring pouring stream of the melt by the alloying agent jet using an am Vessel jacket of the converter arranged addition device is guided so that the two jets meet, the alloying agent jet forms an angle with the vertical plane formed by the pouring jet.
  • the associated device consists of an addition tube for the alloying means arranged on the vessel jacket of the converter, the outlet opening thereof arranged in the region of the tap opening of the converter pointing in the direction of the pouring jet, and means for supplying alloying means to the addition tube.
  • a device for adding alloy materials in which a chute directed towards the pouring jet is provided for conveying the alloy materials.
  • the chute can be extended from a rest position into a working position under a cover, it being possible to adjust the chute between the starting position B and the end position C.
  • a disadvantage is the fact that the alloys have different speeds due to different lengths of fall in the chute and different inclinations of the chute in the different positions. These different speeds make it difficult for the operator to merge the alloying agent flow with the flowing metal melt stream in any position. Further disadvantages consist in the fact that the known device requires more space and that subsequent installation may not be possible due to the local conditions in a steel mill. Because of the longer transport routes for the alloying agents, there is an increase in the transport time and thus a higher energy expenditure for operating the device and higher maintenance and repair costs. In addition, the device requires a higher investment.
  • the present invention has set itself the task To avoid disadvantages of the known devices and to propose a method and a device which allow the alloying agent jet to hit the molten metal casting jet with great certainty and in this way a more intensive dissolution and distribution of the alloying agents in the weld pool can be set.
  • the invention solves this problem procedurally with the features specified in claim 1 and device-wise with the features of claim 3.
  • the alloying agent jet can be continuously readjusted until it meets the molten metal casting jet. In this way it is ensured that if the two beams, e.g. if the position of the molten metal casting jet changes due to the changing inclination of the converter when the molten metal is poured out of the converter, the jets are brought together again.
  • the two jets can also not coincide if the position of the molten metal casting jet changes due to changing position and size of the tap opening of the converter due to wear or if the position of the alloying agent jet changes due to a different composition of the alloying agent, among other things. due to different grain sizes, friction values and specific weights of the alloying agents.
  • the addition tube is arranged pivotably on the vessel jacket of the converter, preferably on a support ring.
  • a housing designed as a funnel is provided on the support ring, for receiving the alloying means brought in with a conveying trough and for passing it on to the subsequent addition pipe. If a support ring is not or not available at the corresponding point on the converter, a bracket can be attached to the converter jacket.
  • Preferred embodiments of the invention are the subject of subclaim 2 regarding the method and the subject of subclaims 5 to 10 regarding the device.
  • the method according to the invention and the device according to the invention consist in the fact that a subsequent installation of the device is easily possible and only low investment costs have to be used for this. Furthermore, the device is characterized by short transport routes and high operational reliability; the energy expenditure for operating the system and the maintenance and repair costs are low.
  • FIGS. 1 to 4 show a converter 1 for the production of steel, the converter being shown in the working position in FIGS. 1 and 4 and the casting position in FIGS. 2 and 3.
  • a funnel-shaped Housing 4 On a support ring 2 above the support pin 1a in the area of the converter hat 3 is a funnel-shaped Housing 4 arranged for receiving the alloying agent.
  • the housing 4 has a side loading opening 5 and a lower outlet opening 6. At this outlet opening 6 there is an addition pipe 7 with its inlet opening 8.
  • the outlet opening 9 of the addition pipe 7 points in the direction of the steel pouring jet 11, which emerges from the tap opening 10 in the casting position of the converter 1; As FIGS. 2 and 3 show, the alloy medium jet 12 hits the steel pouring jet 11 before it enters the ladle 13.
  • the addition tube 7 is pivotally fastened in the region of its inlet opening 8 via a joint device on the support ring 2.
  • an electro-mechanical, water-cooled adjusting device 14 is arranged on the support ring 2. As shown in detail in FIG. 5, the adjusting device 14 is articulated via a fastening piece 17 to a fastening support 18 which is fastened on the support ring 2.
  • a scissor jack 19 is arranged on the lifting rod 16, the upper arm 21 of which is articulated via a bearing plate 22 to the tip of the addition tube 7 and the lower arm 20 of which is connected to the supporting ring 2 via a further bearing plate 23.
  • Figure 6 shows that by extending the lifting rod 16, the arms 20 and 21 of the scissor lift 19 are spread, so that the addition tube 7 can be continuously adjusted in this way.
  • a U-shaped pipe guide 31 prevents the addition tube 7 from tilting when the converter 1 is pivoted.
  • FIG. 7 shows the design of the articulation device in the area of the inlet opening 8 of the addition tube 7. It consists of a bracket 32 which is fastened on the support ring 2 and an associated holder 33 on the addition tube 7.
  • the bracket 32 and the holder 33 are connected via a Threaded bolt 34 with lock nuts 37, which is arranged in bores of the two parts, not shown, connected to one another.
  • Crowned disks 35 arranged on the threaded bolt 34 and a plate spring assembly 36 ensure the resiliently articulated design of the joint device.
  • the power supply and control cables and the cooling water lines for the adjusting device 14 run in a manner not shown Way in the support ring 2 and through one of the support pins 1a of the converter 1 to the supply sources or to a converter tapping stand 24 on the work platform 25.
  • a vibrating conveyor trough 26 for conveying the alloying agents into the funnel-shaped housing 4 is arranged on the working platform 25; the vibrating conveyor trough 26 can be moved on rails 27.
  • a pneumatically acting piston-cylinder unit 28 serves to move the feed trough 26 back and forth; the cylinder of the assembly 28 is connected to the chassis of the conveyor trough 26 and the piston rod 29 to an external fixed bearing.
  • the electro-mechanical adjusting device 14 is actuated by an operator from the tapping stand 24. Furthermore, a converter position detection known per se is arranged in the tapping stand 24, with which, according to the converter position and the casting time, the vibrating conveyor trough 26 is activated via a drive 26a and the pneumatic piston-cylinder unit 28 for moving the conveyor trough back and forth 26 is controlled.
  • the device according to the invention for introducing alloy substances is operated as follows: After the blowing process, the converter 1 is rotated from the working position according to FIGS. 1 and 4 into the casting position, as shown in FIGS. 2 and 3.
  • the vibrating conveyor trough 26 is advanced so far in accordance with the converter position detection that the front section of the conveyor trough 26 projects into the lateral loading opening 5 of the funnel-shaped housing 4. From bunkers (not shown), the alloying agents now enter the housing 4 via the vibrating conveyor trough 26 that has been put into operation, and through the subsequent addition pipe 7 into the steel pouring jet 11.
  • the falling height of the molten steel in converter 1 is compensated for by further pivoting of the converter; however, this changes the position of the steel pouring jet 11. So that the alloys continue to hit the pouring jet 11, the operator actuates the adjusting device 14 from the tapping stand 24, as a result of which the addition tube 7 is correspondingly continuously adjusted. This ensures that the exiting Alloy medium jet 12 hits the steel pouring jet 11.
  • the adjustment of the addition tube 7 by actuating the adjusting device 14 is also carried out if the position of the steel pouring jet 11 changes with increasing age of the tap opening 10 or if the position of the alloying agent jet 12 changes as a result of the changing composition of the alloying agent.
  • the vibrating conveyor trough 26 is controlled via the converter position detection in such a way that the conveyor trough 26 is moved out of the loading opening 5 of the funnel-shaped housing 4 before the converter 1 swings back into the vertical position.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Coating By Spraying Or Casting (AREA)
EP89107892A 1988-05-03 1989-05-01 Verfahren und Vorrichtung zur Zugabe von Legierungsmitteln in einen Metallgiessstrahl Expired - Lifetime EP0340711B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89107892T ATE92112T1 (de) 1988-05-03 1989-05-01 Verfahren und vorrichtung zur zugabe von legierungsmitteln in einen metallgiessstrahl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3814907 1988-05-03
DE3814907A DE3814907A1 (de) 1988-05-03 1988-05-03 Verfahren und vorrichtung zur zugabe von legierungsmitteln in einen metallgiessstrahl

Publications (3)

Publication Number Publication Date
EP0340711A2 EP0340711A2 (de) 1989-11-08
EP0340711A3 EP0340711A3 (en) 1990-03-21
EP0340711B1 true EP0340711B1 (de) 1993-07-28

Family

ID=6353427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107892A Expired - Lifetime EP0340711B1 (de) 1988-05-03 1989-05-01 Verfahren und Vorrichtung zur Zugabe von Legierungsmitteln in einen Metallgiessstrahl

Country Status (4)

Country Link
EP (1) EP0340711B1 (enrdf_load_stackoverflow)
AT (1) ATE92112T1 (enrdf_load_stackoverflow)
DE (2) DE3814907A1 (enrdf_load_stackoverflow)
ES (1) ES2043937T3 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO165686C (no) * 1988-08-04 1991-03-20 Elkem As Anordning for tilfoersel av inokuleringsmiddel til en oese.
DE19535014C2 (de) * 1995-09-21 1999-03-04 Stein Ind Anlagen Inh Christel Verfahren zum Einbringen von körnigen Feststoffen in Metallschmelzen
GB0007073D0 (en) * 2000-03-24 2000-05-17 Qual Chem Limited Iron and steelmaking
US6471742B2 (en) * 2001-01-22 2002-10-29 Oscar G. Dam Method for producing an improved charging stock for use in metallurgical processes
AT504079B1 (de) * 2006-09-13 2008-09-15 Siemens Vai Metals Tech Gmbh Verfahren zum abgiessen von schmelze aus einem kippbaren metallurgischen gefäss sowie anlage zur durchführung des verfahrens
TWI652350B (zh) * 2016-04-25 2019-03-01 日商新日鐵住金股份有限公司 Melting iron desulfurization method and desulfurization device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE435596C (de) * 1925-03-14 1926-10-15 Gustav Hilger Verteilungsvorrichtung fuer die Beschickung von OEfen
US3511490A (en) * 1967-02-24 1970-05-12 Brown Fintube Co Apparatus for introducing addition agent into molten steel
DE2632707C3 (de) * 1976-07-21 1983-04-07 Ernst Dipl.-Ing. 4006 Erkrath Beiersdorf Beschickungsanlage an Elektro-Lichtbogenöfen zur Zugabe von Legierungsmitteln und Zuschlagstoffen
AT345491B (de) * 1976-12-10 1978-09-25 Voest Ag Einrichtung zur zugabe von zusatzstoffen in einen metallgiessstrahl

Also Published As

Publication number Publication date
EP0340711A3 (en) 1990-03-21
EP0340711A2 (de) 1989-11-08
DE3814907C2 (enrdf_load_stackoverflow) 1990-04-12
ES2043937T3 (es) 1994-01-01
ATE92112T1 (de) 1993-08-15
DE3814907A1 (de) 1989-11-09
DE58905013D1 (de) 1993-09-02

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