EP0379072A2 - Verfahren zur Versorgung eine Kokille in einem Stranggussystem und eine Kokillenanordnung für die Verwirklichung derselben - Google Patents

Verfahren zur Versorgung eine Kokille in einem Stranggussystem und eine Kokillenanordnung für die Verwirklichung derselben Download PDF

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Publication number
EP0379072A2
EP0379072A2 EP90100568A EP90100568A EP0379072A2 EP 0379072 A2 EP0379072 A2 EP 0379072A2 EP 90100568 A EP90100568 A EP 90100568A EP 90100568 A EP90100568 A EP 90100568A EP 0379072 A2 EP0379072 A2 EP 0379072A2
Authority
EP
European Patent Office
Prior art keywords
ingot mold
continuous casting
feeding
ingot
casting system
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
EP90100568A
Other languages
English (en)
French (fr)
Other versions
EP0379072A3 (de
EP0379072B1 (de
Inventor
Leandro Nannini
Giacomo Broda
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 Group SpA
Original Assignee
Innse Innocenti Engineering SpA
Innocenti Santeustacchio SpA
Innse Innocenti Santeustacchio SpA
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 Innse Innocenti Engineering SpA, Innocenti Santeustacchio SpA, Innse Innocenti Santeustacchio SpA filed Critical Innse Innocenti Engineering SpA
Publication of EP0379072A2 publication Critical patent/EP0379072A2/de
Publication of EP0379072A3 publication Critical patent/EP0379072A3/de
Application granted granted Critical
Publication of EP0379072B1 publication Critical patent/EP0379072B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds

Definitions

  • This invention relates to a method of feeding an ingot mold in a continuous casting system.
  • ingot mold feeding is a troublesome, if not downright critical, operation because the steel must be poured into a cavity which has a rectangular cross-sectional shape of small width.
  • the ingot mold is fed by means of a plurality of discharge outlets overlying the ingot mold and being provided with respective nozzles of an appropriate size to fit partway into the ingot mold.
  • Feeding the ingot mold from such discharge outlets does not yield, however, very thin flat blooms.
  • the minimum value for the mold width dimension on which the flat bloom thickness will depend is required to exceed the cross dimension of the nozzles, which nozzles must have, in turn, a sufficient steel discharge passage area to relieve a molten steel outflow of any proneness to blocking and suitable thickness to provide the necessary strength and resistance to wear.
  • European Patent Application No. 87116456.2 proposes an ingot mold which has an inner portion, inclusive of the inlet, with oversize cross-section so as to accommodate one or more nozzles of standard size discharge outlets. Such changes in the mold inside outline result, however, in the onset of harmful stresses through the melt skin undergoing progressive solidification.
  • US Patent 4,719,961 provides for the ingot mold to be fed by discharging the molten steel into a funnel of refractory material which overlies the mold but is not inserted through the inlet thereof. While in this way, on the one side, it becomes possible to use ingot molds of much reduced width, on the other side, the funnel presence hinders the continuous lubrication of the inner walls of the ingot mold. Consequently, it is impossible to prevent the steel from adhering on said walls, thereby the solidified steel skin may be broken and the mold rate of wear increased.
  • An additional major drawback is that the steel begins to solidify from the end section of the refractory funnel body, which results in quick deterioration thereof.
  • the problem that underlies this invention is to provide a method of feeding an ingot mold, to yield thin castings, which has such characteristics as to overcome the drawbacks noted herein above in connection with the prior art.
  • the assembly 1 comprises an ingot mold 2 of the vertical type having a rectangular cross-sectional shape wherein two opposed, parallel major sidewalls 3, 4 are held apart by two minor sidewalls 5, 6.
  • the ingot mold 2 is through-penetrated vertically by a passageway 7 having a rectangular cross-sectional shape and extending from a top inlet 2a to an outlet or discharge port 2b of the ingot mold.
  • the walls 3 to 6 of the ingot mold 2 are made of copper and plural passageways 8 are formed in their thickness for a cooling fluid to be supplied from a conduit 9, only partially shown.
  • Said minor walls 5, 6 are each provided with a respective slit 10, 10a extending over a predetermined distance from the inlet 2a of the ingot mold 2.
  • each minor wall 5, 6 Attached laterally to each minor wall 5, 6 is a respective well 11, 12 which is open at the top and provided with a vertical slit 13, 13a in register with the slit 10, 10a in the corresponding wall.
  • the wells 11 and 12 aremade of a refractory material enclosed and protected by a respective metal reinforcement 14, 14a and stand up to a lower height than that of the ingot mold 2, thereby their bottoms 11a, 12a locate at a higher level than the outlet or discharge port 2b of the ingot mold 2.
  • the ingot mold 2 is fed by pouring molten steel into the wells 11 and 12 using any desired discharge device.
  • the steel will flow from the wells into the passageway 7 of the ingot mold 2 through the slits 13, 13a and 10, 10a of the wells 11 and 12 and of the walls 5 and 6, respectively.
  • the ingot mold can be easily lubricated from above with oils and powders over the inner walls to prevent the steel from clinging to them (skin breaking) and attenuate the wall wear.
  • the steel stream turbulence will be settled therein before entering the ingot mold, while any variations in the line rate and/or molten steel flow rate can be accommodated.
  • Another advantage afforded by the invention is that impurities can be decanted prior to getting into the ingot mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP90100568A 1989-01-17 1990-01-12 Verfahren zur Versorgung eine Kokille in einem Stranggussystem und eine Kokillenanordnung für die Verwirklichung derselben Expired - Lifetime EP0379072B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1910789 1989-01-17
IT8919107A IT1228473B (it) 1989-01-17 1989-01-17 Metodo di alimentazione di una lingottiera in un impianto di colata continua e complesso di lingottiera per l'attuazione del metodo.

Publications (3)

Publication Number Publication Date
EP0379072A2 true EP0379072A2 (de) 1990-07-25
EP0379072A3 EP0379072A3 (de) 1992-03-04
EP0379072B1 EP0379072B1 (de) 1995-08-02

Family

ID=11154644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100568A Expired - Lifetime EP0379072B1 (de) 1989-01-17 1990-01-12 Verfahren zur Versorgung eine Kokille in einem Stranggussystem und eine Kokillenanordnung für die Verwirklichung derselben

Country Status (5)

Country Link
EP (1) EP0379072B1 (de)
AT (1) ATE125738T1 (de)
CA (1) CA2007888A1 (de)
DE (1) DE69021222T2 (de)
IT (1) IT1228473B (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60174249A (ja) * 1984-02-20 1985-09-07 Nippon Cement Co Ltd 金属複合材の製造方法
JPS61229459A (ja) * 1985-04-03 1986-10-13 Mitsubishi Heavy Ind Ltd 複合鋳造ロ−ルの製造方法
US4719961A (en) * 1985-08-09 1988-01-19 Sms Schloemann-Siemag Aktiengesellschaft Vertical or bow-type continuous casting machine for steel
EP0268910B1 (de) * 1986-11-27 1991-09-04 Sms Schloemann-Siemag Aktiengesellschaft Kokille zum Stranggiessen von Stahlband

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60174249A (ja) * 1984-02-20 1985-09-07 Nippon Cement Co Ltd 金属複合材の製造方法
JPS61229459A (ja) * 1985-04-03 1986-10-13 Mitsubishi Heavy Ind Ltd 複合鋳造ロ−ルの製造方法
US4719961A (en) * 1985-08-09 1988-01-19 Sms Schloemann-Siemag Aktiengesellschaft Vertical or bow-type continuous casting machine for steel
EP0268910B1 (de) * 1986-11-27 1991-09-04 Sms Schloemann-Siemag Aktiengesellschaft Kokille zum Stranggiessen von Stahlband

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 10 (M-446)(2067); & JP - A - 60174249 (NIHON CEMENT) 07.09.1985 *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 74 (M-568)(2521); & JP - A - 61229459 (MITSUBISHI) 13.10.1986 *

Also Published As

Publication number Publication date
EP0379072A3 (de) 1992-03-04
DE69021222T2 (de) 1996-01-04
ATE125738T1 (de) 1995-08-15
CA2007888A1 (en) 1990-07-17
IT8919107A0 (it) 1989-01-17
EP0379072B1 (de) 1995-08-02
DE69021222D1 (de) 1995-09-07
IT1228473B (it) 1991-06-19

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