US3794218A - Method and apparatus for opening a sealing element, which cannot be actuated, of the bottom nozzle of a casting vessel - Google Patents

Method and apparatus for opening a sealing element, which cannot be actuated, of the bottom nozzle of a casting vessel Download PDF

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Publication number
US3794218A
US3794218A US00291919A US3794218DA US3794218A US 3794218 A US3794218 A US 3794218A US 00291919 A US00291919 A US 00291919A US 3794218D A US3794218D A US 3794218DA US 3794218 A US3794218 A US 3794218A
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US
United States
Prior art keywords
casting
sealing element
oxygen
jet
immersion tube
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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
US00291919A
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English (en)
Inventor
M Yanagida
W Bruderer
S Sakanoue
H Nakagawa
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SMS Concast AG
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Concast AG
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Publication date
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    • 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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
    • 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
    • B22D41/14—Closures
    • B22D41/44—Consumable closure means, i.e. closure means being used only once
    • B22D41/46—Refractory plugging masses
    • B22D41/465—Unplugging a vessel discharge port

Definitions

  • an oxygen infeed or lead is introduced through the hollow compartment or cavity associated with the casting et into the region of the sealing element, the casting vessel together with the immersion tube is brought into the casting position,
  • the sealing element is lanced or burned and the oxy- 23 gen infeed or lead is removed through the steel which issues from the hollow compartment or cavity associated with the casting jet.
  • the present invention relates to a new and improved method of opening a sealing or closure element, which cannot be actuated, of the bottom nozzle of a casting vessel, especially during continuous casting, wherein the steel which issues is passed through an immersion tube into the next steel receiver, and also pertains to a new and improved apparatus for carrying out the aforesaid method.
  • the sand can sintcr together at the region of the liquid steel and offer considerable resistance to lancing with oxygen.
  • the casting vessel togetherwith the immersion tube must be displaced or lifted from its casting position in order to permit access by an oxygen lance to the steel plug or sand plug through the immersion tube hollow compartment or cavity. Shifting of the casting vessel from the casting position is not possible in the case of, for example, multi-strand installations with casting vessels with several casting orifices, since the orifices which are already in their casting operation would be excessively interfered with. Accordingly, the frozen-up casting orifices cannot be opened, which leads to considerable economic disadvantages. Furthermore, in the case of immersion tube orifices which issue laterally, the start of casting with the immersion tube outside its casting position is extremely dangerous because of the laterally issuing liquid steel, and for this reason also can not be carried out.
  • Another and more specific object of the present invention relates to a new and improved method of, and apparatus for, lancing a sealing element without the drawback of changing the casting position of the casting vessel.
  • the inventive method is manifested by the features that an oxygen infeed or lead is introduced through the hollow compartment or cavity associated with the casting jet into the region of the sealing element, then the casting vessel together with the immersion tube is brought into the casting position, and after filling the steel or molten metal into the vessel and at the beginning of casting the sealing element is lanced and theoxygen infeed or lead is removed through the steel which issues from the cavity associated with the casting jet.
  • the method acccording to the invention provides the additional advantages that the movable slide plate is relieved of the ferrostatic pressure by the sealing element and at the same time sand is no longer necessary. As a result, the danger of the sand caking together in the nozzle or the penetration of sand particles between the plates is eliminated.
  • the slide closure is closed for increased safety, but the sealing element prevents liquid steel from coming into contact with the slide plate.
  • the slide closure can be opened without I pressure being applied to.it and without the danger of penetration of solid material into the sealing gap between the slide plates, after which the sealing element is lanced i.e., eliminated by burning.
  • the apparatus for carrying out the method aspects is distinguished by the features that an oxygen infeed or lead passes through the immersion tube into the region of the sealing element and that the infeed or lead, in the area where it enters the casting jet, consists of a material which can be fused or melted by the casting jet.
  • the immersion tube dips under thesurface of the bath in the next steel receiver, and if the oxygen infeed or lead is introduced laterally above this bath surface into the hollow compartment or cavity associated with the casting jet, then the oxygen infeed or lead is sealed after lancing the sealing element, as a result of which liquid steel is prevented from issuing laterally through the orifice for the lead.
  • the oxygen infeed or lead consists of a pipe system bent in the manner of a syphon, with the end section leading from the outlet orifice or opening of the immersion nozzle, through the hollow casting compartment or cavity, into the region of the sealing element.
  • the end section of the oxygen infeed or lead is advantageously made of steel, as a result of which it becomes sufficiently resistant to radiant heat. Aluminium is particularly suitable for use as a material for the infeed or lead in the region where it enters the casting jet, since it easily, and without harmful effect on the cast product, can be melted by the steel which issues.
  • FIG. 1 shows a section through the bottom outlet of a casting vessel with a nozzle and a subsequent immersion tube as well as the'oxygen infeed or lead;
  • FIG. 2 shows a section through the bottom outlet of a casting vessel with a slide closure or slide gate nozzle and a subsequent immersion tube as well as the oxygen infeed or lead.
  • FIG. 1 reference rounds a casting orificeor opening 3.
  • the nozzle 6 is followed by an immersion tube 8 which is pressed shutor sealed-off and which leads into the region of ingot mold cavity 12, an aluminium pipe 21 and an end section 20.
  • the U-shapedaluminium pipe 21 is attached to the end of the infeed line 22 which leads into the region of the ingot mold cavity 12.
  • This pipe 21 leads into the lower region of the immersion tube compartment or cavity 11, as shown.
  • the end section or pipe 20, in the form of a steel pipe, is attached to the aluminium pipe 21.
  • This end section 20 leads from the lower region of the hollow compartment or cavity. 11 to the region of the sealing element 15.
  • the oxygen infeed or lead 19 is first introduced into the immersion tube 8. Thereafter, the intermediate container or tundish is brought into the casting position, during the course of which the immersion tube 8 together with the oxygen infeed or infeed means against nozzle 6 by means of a holding device 9.
  • This immersion tube 8 is of sufficient length that it extends from the nozzle 6 at the casting vessel A into the mold cavity 12 of for instance an ingot mold 10.
  • the hollow compartment or cavity 11 associated with the casting jet extends from the casting orifice or opening 3 to the outlet side or end 8a of the immersion tube 8.
  • a sealing element 15 which cannot be actuated is placed in the nozzle 6.
  • This sealing element 15 consists of a round sheet metal disc, the thickness of which is such that it is not fused or melted before casting starts, but nevertheless 19 introduced into it, assumes a pre-determined position in the ingot mold cavity 12. When this position has been reached, molten metal, typically steel is cast into the tundish until a certain level is reached.
  • the non-illustrated shut-off device e.g. valve at the infeed line 22 is opened and oxygen flows at a pre-determined pressure through the oxygen infeed means 19 against the underside of the sheet metal disc 15, the temperature of which in the interim has reached a value required for lancing.
  • the sheet metal disc I5 and any solidified steel which may lie above it is lanced, as a result of which the casting orifice or opening 3 is released.
  • the steel which issues melts the part of the aluminium pipe 21 which lies at the region of the casting jet, as a result of which the remainder of the oxygen infeed or lead, located in the cavity 11, is removed therefrom by the steel which flows-out or issues.
  • the remainder of the aluminium pipe 21 together with the lead 22 can thereafter be removed from the ingot mold cavity 12.
  • FIG. 2 illustrates a solution for a casting vessel A with' a slide closure or slide gate nozzle 25.
  • the slide closure or slide gate nozzle 25 is fixed to the bottom 1 of the casting vessel A and its upper slide plate 26 cooperates with the nozzle 6 in the brick or block 7 which again possess a bore or hole 70.
  • the lower slide plate 27 and the therewith associated guide 29 can be appropriately slid aside by meansof aslide actuating device 23.
  • a spacer ring or ring member 33 is provided between the lower slide plate 27 and the immersion tube 8 provided with lateral casting orifices 8b located beneath the metal level in the mold'during the casting process. This ring 33 or ring member and the immersion tube 8' are held by means of a holder 30 against the lower slide plate 27.
  • the holder 30 possesses a lateral orifice 30a through which the oxygen infeed means or lead 19' is passed into the spacer ring 33.
  • the infeed line or conduit 22 here alsohas a suitable shut-off device, not shown, by means of which it can be shut-off.
  • a short bent aluminium pipe section 21 is fixed in the bore of the spacer ring 33.
  • a steel pipe or section 20' is mounted upon this spacer 21. This steel pipe 20 extends to below the upper slide plate 26. When starting casting with an open slide, however, it can also extend as far as below the sealing element in the casting orifice or opening 3.
  • a further possibility, with the slide closed, is to locate the oxygen infeed means or infeed 19' in the upper slide plate 26.
  • the shut-off device in the line 22 can also be replaced by a multi-way tap.
  • oxygen is passed through the line 22.
  • an inert gas is introduced into the infeed line 22' through re-setting the multi-way tap. This gas is under a pressure which prevents liquid steel from penetrating into the orifice which remains in the spacer ring 33 and can at the same time, during casting, serves to flush the casting orifice 3.
  • the latter can be also introduced through the outlet orifice of the immersion tube 8 if this immersion tube has the shape shown in FIG. 2. This, however, requires that the end section 20 should be sufficiently malleable.
  • the method has been discussed in relation to continuous casting. It can, however, also be used in other processes in the manufacture of steel where there is inadequate accessability for lancing sealing elements, for example vacuum treatment, flushing with gas and the like.
  • An apparatus for opening a sealing element of the bottom nozzle of a casting vessel comprising a casting vessel provided with a bottom nozzle, an immersion tube provided for the casting vessel through which molten metal passes into a subsequent molten metal receiver, said immersion tube having a cavity for the passage ofa casting jet, a sealing element provided for the bottom nozzle of the casting vessel, oxygen infeed means entering into said casting jet and passing to the region of the sealing element for the burning through of said sealing element, said oxygen infeed means at the region where it enters the casting jet comprises a material which can be fused by the casting jet.
  • said oxygen infeed means comprises a flexed pipe system, said flexed pipe system having an end section leading through the cavity associated with the casting jet towards the region of the sealing element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US00291919A 1971-09-27 1972-09-25 Method and apparatus for opening a sealing element, which cannot be actuated, of the bottom nozzle of a casting vessel Expired - Lifetime US3794218A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1405971A CH537226A (de) 1971-09-27 1971-09-27 Verfahren und Vorrichtung zum Öffnen eines unbetätigbaren Verschlusskörpers des Bodenausgusses eines Giessgefässes

Publications (1)

Publication Number Publication Date
US3794218A true US3794218A (en) 1974-02-26

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ID=4397596

Family Applications (1)

Application Number Title Priority Date Filing Date
US00291919A Expired - Lifetime US3794218A (en) 1971-09-27 1972-09-25 Method and apparatus for opening a sealing element, which cannot be actuated, of the bottom nozzle of a casting vessel

Country Status (17)

Country Link
US (1) US3794218A (fr)
AR (1) AR198187A1 (fr)
AT (1) AT319499B (fr)
AU (1) AU474316B2 (fr)
BE (1) BE789278A (fr)
BR (1) BR7206675D0 (fr)
CA (1) CA980976A (fr)
CH (1) CH537226A (fr)
DE (1) DE2247185A1 (fr)
ES (1) ES407219A1 (fr)
FR (1) FR2154607B1 (fr)
GB (1) GB1368189A (fr)
IT (1) IT967879B (fr)
LU (1) LU66149A1 (fr)
RO (1) RO61626A (fr)
SE (1) SE388143B (fr)
ZA (1) ZA726522B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931913A (en) * 1973-11-16 1976-01-13 Stopinc Aktiengesellschaft Slide gate nozzle
US4073627A (en) * 1975-11-27 1978-02-14 British Gas Corporation Coal gasification plant
US4202533A (en) * 1978-08-24 1980-05-13 Daussan Et Compagnie Method and a device for unchoking the casting outlet of a metallurgical vessel
US4450986A (en) * 1982-07-09 1984-05-29 Harasym Michael F Apparatus for unplugging a vessel discharge port
EP0267575A2 (fr) * 1986-11-14 1988-05-18 Vesuvius Crucible Company Appareil pour laisser ouvert une busette de coulée d'une poche
US4799649A (en) * 1986-07-15 1989-01-24 Flo-Con Systems, Inc. Injection valve components and method
US4824079A (en) * 1986-07-15 1989-04-25 Flo-Con Systems, Inc. Injection valve components and method
US4877161A (en) * 1986-11-14 1989-10-31 Vesuvius Crucible Company Telescoping device for unplugging a vessel discharge port

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000546A1 (fr) * 1978-09-15 1980-04-03 Ssab Svenskt Stal Ab Procede d'ouverture de la buse d'une cuve refractaire dans la coulee continue de l'acier
FR2467651A1 (fr) * 1979-10-25 1981-04-30 Daussan & Co Dispositif pour deboucher l'orifice de coulee d'un recipient metallurgique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US673556A (en) * 1899-09-15 1901-05-07 John M Hartman Iron notch for blast-furnaces and means for plugging same.
US689585A (en) * 1901-05-27 1901-12-24 John M Hartman Iron-notch for blast-furnaces.
US1833739A (en) * 1929-11-04 1931-11-24 Gen Electric Furnace tapping device
US3459346A (en) * 1966-10-18 1969-08-05 Metacon Ag Molten metal pouring spout
US3670799A (en) * 1971-01-14 1972-06-20 Essex International Inc Method and apparatus for siphoning molten metal to a continuous casting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US673556A (en) * 1899-09-15 1901-05-07 John M Hartman Iron notch for blast-furnaces and means for plugging same.
US689585A (en) * 1901-05-27 1901-12-24 John M Hartman Iron-notch for blast-furnaces.
US1833739A (en) * 1929-11-04 1931-11-24 Gen Electric Furnace tapping device
US3459346A (en) * 1966-10-18 1969-08-05 Metacon Ag Molten metal pouring spout
US3670799A (en) * 1971-01-14 1972-06-20 Essex International Inc Method and apparatus for siphoning molten metal to a continuous casting machine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931913A (en) * 1973-11-16 1976-01-13 Stopinc Aktiengesellschaft Slide gate nozzle
US4073627A (en) * 1975-11-27 1978-02-14 British Gas Corporation Coal gasification plant
US4202533A (en) * 1978-08-24 1980-05-13 Daussan Et Compagnie Method and a device for unchoking the casting outlet of a metallurgical vessel
US4450986A (en) * 1982-07-09 1984-05-29 Harasym Michael F Apparatus for unplugging a vessel discharge port
US4799649A (en) * 1986-07-15 1989-01-24 Flo-Con Systems, Inc. Injection valve components and method
US4824079A (en) * 1986-07-15 1989-04-25 Flo-Con Systems, Inc. Injection valve components and method
EP0267575A2 (fr) * 1986-11-14 1988-05-18 Vesuvius Crucible Company Appareil pour laisser ouvert une busette de coulée d'une poche
EP0267575A3 (fr) * 1986-11-14 1988-08-17 Vesuvius Crucible Company Appareil pour laisser ouvert une busette de coulée d'une poche
US4877161A (en) * 1986-11-14 1989-10-31 Vesuvius Crucible Company Telescoping device for unplugging a vessel discharge port
WO1989011366A1 (fr) * 1988-05-17 1989-11-30 Vesuvius Crucible Company Dispositif telescopique pour deboucher un orifice de decharge de recipient

Also Published As

Publication number Publication date
ZA726522B (en) 1973-06-27
RO61626A (fr) 1977-01-15
CA980976A (en) 1976-01-06
AR198187A1 (es) 1974-06-07
AT319499B (de) 1974-12-27
AU4715572A (en) 1974-04-04
LU66149A1 (fr) 1973-01-17
FR2154607A1 (fr) 1973-05-11
FR2154607B1 (fr) 1974-08-19
CH537226A (de) 1973-05-31
IT967879B (it) 1974-03-11
ES407219A1 (es) 1975-10-01
BR7206675D0 (pt) 1973-07-24
DE2247185A1 (de) 1973-04-12
SE388143B (sv) 1976-09-27
BE789278A (fr) 1973-01-15
GB1368189A (en) 1974-09-25
AU474316B2 (en) 1976-07-22

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