[go: up one dir, main page]

EP0059805A1 - Porous nozzle for molten metal vessel - Google Patents

Porous nozzle for molten metal vessel Download PDF

Info

Publication number
EP0059805A1
EP0059805A1 EP19810301019 EP81301019A EP0059805A1 EP 0059805 A1 EP0059805 A1 EP 0059805A1 EP 19810301019 EP19810301019 EP 19810301019 EP 81301019 A EP81301019 A EP 81301019A EP 0059805 A1 EP0059805 A1 EP 0059805A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
porous
gas
porous nozzle
flange
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
EP19810301019
Other languages
German (de)
French (fr)
Other versions
EP0059805B1 (en
Inventor
Junichi Ato
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8188235&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0059805(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to DE8181301019T priority Critical patent/DE3168852D1/en
Priority to EP19810301019 priority patent/EP0059805B1/en
Publication of EP0059805A1 publication Critical patent/EP0059805A1/en
Application granted granted Critical
Publication of EP0059805B1 publication Critical patent/EP0059805B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/42—Features relating to gas injection
    • 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
    • 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
    • B22D41/50—Pouring-nozzles
    • B22D41/58—Pouring-nozzles with gas injecting means

Definitions

  • This invention relates to an improvement in a porous nozzle which is arranged at the bottom of a molten metal vessel, and the objects of which are to float up and separate . the non-metallic inclusions in molten metal in said vessel and to prevent a slag involvement and a nozzle opening closure. More particularly it relates to an improvement of a porous nozzle mounted at the bottom of a ladle or tunidish container of the molten metal vessel.
  • the nozzle of a ladle or tundish container is constructed with a dense refractory.
  • non-metallic inclusions in the molten steel often adhere in the nozzle opening during the flowing-down of the melt to cause a contraction and a closure thereby often bring about troubles in the pouring operation of the melt.
  • a refractory porous plug is arranged at the bottom of a container such as ladle or tundish, and inert gases are jetted into the molten steel through the pores of the porous plug when the non-metallic inclusions are floated u p and separated and the purity of said molten steel is improved.
  • a refractory weir is provided within said vessel to change the flow of the molten steel, and the non-metallic inclusions in the molten steel are floated up and separated.
  • a weir is provided in a tundish container, it exhibits effects in its own way for floating up and separating the non-metallic inclusions.
  • the dimension of tundish is limited because of structure and design of a continuous casting equipment,., however, it is difficult to make an effective weir shape or arrange an effective weir within a comparatively narrow tundish, and it is known that not only the tundish design becomes complicate but also it is difficult to fix a weir within the tundish.
  • porous nozzle arranged in conventional tundishes has effects for preventing contraction and closure of nozzle, but generally in a continuous casting working said nozzle may involve the non-metallic inclusions, slag, etc. which float up by a turbulence generated at the upper portion of the nozzle opening when the ladle is replaced, thereby causing a lowered quality of steel.
  • the present invention provides an integral, flange- shaped, porous nozzle which has in combination a function of jetting inert gases upwardly into the molten steel by a porous plug and a function of jetting the inert gases from the inner peripheral surface of a porous nozzle to prevent the nozzle from closing, and in which the inclusions in the molten steel are floated up and separated whereby the nozzle is prevented from closure, and it can avoid a slag involvement caused by the turbulence generated at the upper portion of the nozzle opening when the ladle is replaced, while allowing a continuous casting of a molten steel of high quality.
  • the porous nozzle of the invention has in combination both the functions of jetting inert gases from the porous refractory layer of the flange portion into the upper portion in the molten steel, and of jetting the inert gases into the nozzle opening.
  • the reason of separating the gas ejection mechanism in the flange upper surface from that in the nozzle opening (lla) is that specifically in a porous nozzle for tundish container, owing to the physical pressure difference between the molten steel static pressure within the tundish, which is received by the upper surface of the flange, and the molten steel kinetic pressure (pressure is reduced based on the Bernoulli's theorem) which is received by the inner peripheral surface of the nozzle during the time when the molten steel flows-down within said nozzle opening, it is necessary to separately adjust the gas blowing pressure in the flange portion and that into the nozzle opening (lla).
  • the present invention has a great number of merits in such that in the case of a closing mechanism of a sliding nozzle (lower nozzle) constituting the lower portion of said porous nozzle, it will suffice only to eject gas from the upper surface of the flange thanks to a plurality of blow openings as arranged, and if necessary it is capable of adjusting the gas ejection and gas pressure freely so as to save the use amount of inert gases.
  • the porous refractory layer of the main body of said porous nozzle is constructed in such a way that between the porous refractory layer of the flange nortion and that of the cylindrical portion there is formed a fine porous refractory layer (6) which is fine porosity and has a great gas resistancy compared with the porous refractory layer of the main porous body, inert gases are guided from the gas blow opening (4) and the gases are jetted, through the gas pool (2), from the upper surface of the flange, permeating the pores of the porous refractory layer (la) of the flange portion, while a part- of the inert gases permeates through the porous refractory layer (lb) of the vertical side through the fine porous refractory layer (6) thereby to be jetted into the nozzle opening.
  • the fine porous refractory layer is not flat in its sectional configuration but it may be of optional shape, and naturally the thickness of said layer is optionally selected and said layer is formed in shape and thickness answering the conditions, considering the permeation and resistance of the gas.
  • Fig. 4 is a schematical sectional view of the porous nozzle of Fig. 2, in which the porous nozzle wherein the ejection mechanism from the flange surface is separated from that into the nozzle opening, is arranged at the bottom of a molten metal vessel. Further, Fig. 4 is also a sectional view of the porous nozzle (1) as arranged, in which a through hole is provided at the bottom of a vessel where a iron casing (7) is lined with refractory bricks (8), said porous nozzle being mounted in the central zone of the inner peripheral surface of a nozzle-receiving brick (9) fixed in said through hole.
  • Fig: 4 is examplified with a porous nozzle being connected at its lower end to a sliding nozzle (10), but said nozzle can naturally be applicable to melt discharging nozzles which adopt a stopper system as a nozzle opening and closing mechanism.
  • the porous nozzle of the invention widens its width in an operable range in the length in the width direction of the flange, the more it produces its effect.
  • the optimum width and thickness of the flange should be selected.
  • the upper surface 6f the flange is shown in a flat configuration, but the shape is not limited to said configuration and there is no trouble in use even if the surface is curved or uneven a little.
  • the porous nozzle has a function for ejecting an inert gas toward the upper portion of the molten metal.
  • the porous nozzle of the invention has been described in detail particularly with respect to a tundish nozzle for molten steel, but the present invention is very useful industrially in that it is applicable to vessels for other molten metals such as copper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

A refractory porous nozzle which is arranged at the bottom of a molten metal vessel, characterized in that said porous nozzle (1) is made in one body having a flange portion (1a) at its upper portion and a cylindrical portion (1b) at its lower portion, the outer peripheral surface of the main body of said porous nozzle is gas-tightly enclosed with a steel shell (3), a gas pool (2) is provided between the bottom surface of said flange portion and the outer peripheral surface of said cylindrical portion, and the inner peripheral surface of said steel shell, and the gas pool is communicated with an inert gas feeding pipe (4).

Description

  • This invention relates to an improvement in a porous nozzle which is arranged at the bottom of a molten metal vessel, and the objects of which are to float up and separate . the non-metallic inclusions in molten metal in said vessel and to prevent a slag involvement and a nozzle opening closure. More particularly it relates to an improvement of a porous nozzle mounted at the bottom of a ladle or tunidish container of the molten metal vessel.
  • Generally the nozzle of a ladle or tundish container is constructed with a dense refractory. However, non-metallic inclusions in the molten steel often adhere in the nozzle opening during the flowing-down of the melt to cause a contraction and a closure thereby often bring about troubles in the pouring operation of the melt. To prevent these disadvantageous phenomena, therefore, it is generally carried out to employ a refractory porous nozzle in which inert gases are jetted into the inner peripheral surface of the nozzle through the pores thereby to form a gas film and remove the things adhered to the nozzle opening. Further, for another porpose, in order that the non-metallic inclusions in the molten steel within the vessel are removed to make a purified and good quality molten steel there is also carried out a method in which separately from a porous nozzle, a refractory porous plug is arranged at the bottom of a container such as ladle or tundish, and inert gases are jetted into the molten steel through the pores of the porous plug when the non-metallic inclusions are floated up and separated and the purity of said molten steel is improved.' There is another method which does not use a porous plug. To take a tundish for example, a refractory weir is provided within said vessel to change the flow of the molten steel, and the non-metallic inclusions in the molten steel are floated up and separated. According to the method in which a weir is provided in a tundish container, it exhibits effects in its own way for floating up and separating the non-metallic inclusions. In view that the dimension of tundish is limited because of structure and design of a continuous casting equipment,.,, however, it is difficult to make an effective weir shape or arrange an effective weir within a comparatively narrow tundish, and it is known that not only the tundish design becomes complicate but also it is difficult to fix a weir within the tundish.
  • Further, the porous nozzle arranged in conventional tundishes has effects for preventing contraction and closure of nozzle, but generally in a continuous casting working said nozzle may involve the non-metallic inclusions, slag, etc. which float up by a turbulence generated at the upper portion of the nozzle opening when the ladle is replaced, thereby causing a lowered quality of steel. Furthermore, according to the method in which a porous plug is provided at the bottom of a tundish container and inert gases are jetted into the molten steel, it is effective for floating up and separating the inclusions, but the plug must be arranged at a position different from that of the nozzle so that a complete effect cannot be exhibited for preventing the slag involvement, due to the tubulence generated at the upper portion of the nozzle opening when replacing the ladle as referred to above.
  • In view of said various demerits of conventional methods, the present invention provides an integral, flange- shaped, porous nozzle which has in combination a function of jetting inert gases upwardly into the molten steel by a porous plug and a function of jetting the inert gases from the inner peripheral surface of a porous nozzle to prevent the nozzle from closing, and in which the inclusions in the molten steel are floated up and separated whereby the nozzle is prevented from closure, and it can avoid a slag involvement caused by the turbulence generated at the upper portion of the nozzle opening when the ladle is replaced, while allowing a continuous casting of a molten steel of high quality. That is, it is the characteristic feature of the invention that the porous nozzle of the invention has in combination both the functions of jetting inert gases from the porous refractory layer of the flange portion into the upper portion in the molten steel, and of jetting the inert gases into the nozzle opening.
  • The invention will now be described more in detail with reference to the accompanying drawings which show some embodiments of the 'invention, in which
    • Fig. 1 shows an embodiment of a porous nozzle of the invention and a vertical section of a porous nozzle in one body in which the bottom of the flange portion is communicated with a gas pool of the cylindrical outer circumference;
    • Fig. 2 shows another embodiment of the invention and a vertical section of a porous nozzle in which the flange portion and the cylindrical portion are made in one body through a sealing member;
    • Fig. 3 shows still another embodiment of the invention and a vertical section of a porous nozzle in which the flange portion and the cylindrical portion are made in one body through a fine porous refractory layer; and
    • Fig. 4 is a vertical sectional view showing a state in which the porous nozzle of Fig. 2 is set at the bottom of a molten metal vessel.
    • In Fig. 1 the porous nozzle arranged at the pouring- out portion at the bottom of a molten steel vessel is mounted in the nozzle socket at the central portion of a nozzle-receiving brick, the outer peripheral surface of which brick being in contact with the lining refractory brick of said vessel bottom. The object of the invention is to provide an excellent porous nozzle in which the vessel is surrouned with an iron shell (3) in such a manner that a circular gas pool (2) is provided at least at a part or the whole of the outer peripheral surface of a porous refractory layer constituting the main body of a porous nozzle (1) and at least at a part or the whole of the flange portion at the lower end of a flange porous layer (la), the gas pool (2) is communicated with a vent clearance (2a) in the outer peripheral surface of the nozzle cylindrical portion, inert gases are jetted through a piping from the outside into a nozzle opening (lla) from the upper surface of said porous refractory layer (la) constituting the flange portion of the porous nozzle and from the inner periphery surface of a porous refractory layer (lb) constituting the nozzle cylindrical portion, and by doing so it is possible easily to float up and separate the non-metallic inclusions in the molten steel while preventing the nozzle opening from closure and slag involvement.
    • Fig. 2 shows an embodiment of a porous nozzle where the porous refractory layer of Fig. 1 is made double. That is, this porous nozzle is the one in which the porous refractory layer (la) is isolated by a sealing member (5) from the porous refractory layer (lb) constituting the cylindrical portion whereby the function of jetting the inert gases upwardly in the molten steel is separated from the function of jetting them into an nozzle opening (lla). The present porous nozzle has in one unit a mechanism of jetting gases to the upper surface of the flange, permeating the pores of the flange porous refractory layer through a gas blowing opening (4) mounted at the end of a gas pool (2) provided in the circumference at the lower end of the flange of said porous nozzle, and a mechanism of jetting the gases into the nozzle opening (lla), permeating the pores of the porous refractory layer (lb) of the nozzle cylindrical portion through a gas pool (2a) surrounded by an iron shell (3). A sealing member (5) of separating said two mechanism may be made of silica, alumina or any other optional sintered refractory to prevent gas leakage completely, and the important thing is that a gas leakage to the outside is prevented and that a gas permeation is prevented between the refractory porous layer of the flange portion and the porous refractory layer of the nozzle cylindrical portion through said sealing member (5).
  • The reason of separating the gas ejection mechanism in the flange upper surface from that in the nozzle opening (lla) is that specifically in a porous nozzle for tundish container, owing to the physical pressure difference between the molten steel static pressure within the tundish, which is received by the upper surface of the flange, and the molten steel kinetic pressure (pressure is reduced based on the Bernoulli's theorem) which is received by the inner peripheral surface of the nozzle during the time when the molten steel flows-down within said nozzle opening, it is necessary to separately adjust the gas blowing pressure in the flange portion and that into the nozzle opening (lla). Concerning the pressure of the gas blown into the nozzle opening (lla), it is possible to prevent the nozzle from contraction and closure by forming a gas curtain in the inner peripheral surface of the nozzle opening, and with a gas pressure unnecessarily raised the inert gases are involved into the molten steel when the melt flows down into the nozzle opening, and therefore there is an unfavorable possibility that pin holes occur in the solidifying process of the molten steel. Further, the present invention has a great number of merits in such that in the case of a closing mechanism of a sliding nozzle (lower nozzle) constituting the lower portion of said porous nozzle, it will suffice only to eject gas from the upper surface of the flange thanks to a plurality of blow openings as arranged, and if necessary it is capable of adjusting the gas ejection and gas pressure freely so as to save the use amount of inert gases.
  • According to the porous nozzle of Fig. 3, the porous refractory layer of the main body of said porous nozzle is constructed in such a way that between the porous refractory layer of the flange nortion and that of the cylindrical portion there is formed a fine porous refractory layer (6) which is fine porosity and has a great gas resistancy compared with the porous refractory layer of the main porous body, inert gases are guided from the gas blow opening (4) and the gases are jetted, through the gas pool (2), from the upper surface of the flange, permeating the pores of the porous refractory layer (la) of the flange portion, while a part- of the inert gases permeates through the porous refractory layer (lb) of the vertical side through the fine porous refractory layer (6) thereby to be jetted into the nozzle opening. When a part of the inert gases permeates through said fine porous refractory layer (6) the gas pressure is considerably reduced so that the amount of the gas entering into the nozzle opening (lla) is decreased and therefore, the molten steel will never be involved with inert gas.
  • In the drawings the fine porous refractory layer is not flat in its sectional configuration but it may be of optional shape, and naturally the thickness of said layer is optionally selected and said layer is formed in shape and thickness answering the conditions, considering the permeation and resistance of the gas.
  • Fig. 4 is a schematical sectional view of the porous nozzle of Fig. 2, in which the porous nozzle wherein the ejection mechanism from the flange surface is separated from that into the nozzle opening, is arranged at the bottom of a molten metal vessel. Further, Fig. 4 is also a sectional view of the porous nozzle (1) as arranged, in which a through hole is provided at the bottom of a vessel where a iron casing (7) is lined with refractory bricks (8), said porous nozzle being mounted in the central zone of the inner peripheral surface of a nozzle-receiving brick (9) fixed in said through hole. Fig: 4 is examplified with a porous nozzle being connected at its lower end to a sliding nozzle (10), but said nozzle can naturally be applicable to melt discharging nozzles which adopt a stopper system as a nozzle opening and closing mechanism.
  • The invention will now be described by way of example.
  • By mounting the porous nozzle (shown in Fig. 2) of the invention to a tundish container there was carried out a 4-continuous casting operation for steel plates for motorcars, but as expected initially there was neither contraction nor closure of the nozzle at all, and not observed any slag involvement when the ladle was replaced. Moreover, even the index of the non-metallic inclusions could be reduced by 30-40% compared with conventional porous nozzles to obtain a very satisfactory result. The conditions of carrying out the operation are as follows:
    Figure imgb0001
  • The more the porous nozzle of the invention widens its width in an operable range in the length in the width direction of the flange, the more it produces its effect. However, putting the shape and capacity of the melt vessel and the problems of said vessel when operating into consideration the optimum width and thickness of the flange should be selected. In the drawings the upper surface 6f the flange is shown in a flat configuration, but the shape is not limited to said configuration and there is no trouble in use even if the surface is curved or uneven a little. The important thing is that the porous nozzle has a function for ejecting an inert gas toward the upper portion of the molten metal. The porous nozzle of the invention has been described in detail particularly with respect to a tundish nozzle for molten steel, but the present invention is very useful industrially in that it is applicable to vessels for other molten metals such as copper.

Claims (3)

1. A refractory porous nozzle which is arranged at the bottom of a molten metal vessel, characterized in that said porous nozzle is made in one body having a flange portion at its upper portion and a cylindrical portion at its lower portion, the outer peripheral surface of the main body of said porous nozzle is gas-tightly enclosed with a steel shell, a gas pool is provided between the bottom surface of said flange portion and the outer peripheral surface of said cylindrical portion, and the inner peripheral surface of said steel shell, and the gas pool is communicated with an inert gas feeding pipe.
2. A porous nozzle as described in Claim 1 wherein the flange Dortion and cylindrical portion of the nozzle are constructed in one body through a sealing member, and each gas pool is communicted with an inert gas feeding pipe.
3. A porous nozzle as described in Claim 1 wherein the flange portion and cylindrical portion of the nozzle is constructed in one body through a porous refractory layer more fine than in the nozzle body, a gas pool is provided only at the lower surface of said flange portion, and said gas pool is communicated with an inert gas feeding pipe.
EP19810301019 1981-03-11 1981-03-11 Porous nozzle for molten metal vessel Expired EP0059805B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8181301019T DE3168852D1 (en) 1981-03-11 1981-03-11 Porous nozzle for molten metal vessel
EP19810301019 EP0059805B1 (en) 1981-03-11 1981-03-11 Porous nozzle for molten metal vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19810301019 EP0059805B1 (en) 1981-03-11 1981-03-11 Porous nozzle for molten metal vessel

Publications (2)

Publication Number Publication Date
EP0059805A1 true EP0059805A1 (en) 1982-09-15
EP0059805B1 EP0059805B1 (en) 1985-02-13

Family

ID=8188235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810301019 Expired EP0059805B1 (en) 1981-03-11 1981-03-11 Porous nozzle for molten metal vessel

Country Status (2)

Country Link
EP (1) EP0059805B1 (en)
DE (1) DE3168852D1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543576A1 (en) * 1983-03-30 1984-10-05 Messer Griesheim Gmbh METHOD AND INSTALLATION FOR SCANNING A METAL BATH FILLED IN PARTICULAR FROM STEEL IN A CASTING POUCH OR THE LIKE PROVIDED WITH A SHUTTER PLUG
WO1984004477A1 (en) * 1983-05-12 1984-11-22 James Menzies Thornton Composite refractory product
FR2554024A1 (en) * 1983-11-02 1985-05-03 Didier Werke Ag IMMERSION CASTING BUSH
EP0187924A1 (en) * 1984-11-26 1986-07-23 Cometus AG Process and ladle for gas purging molten metals
GB2173726A (en) * 1985-04-11 1986-10-22 Stopinc Ag Metallurgical discharge sleeves
BE1000818A3 (en) * 1986-11-13 1989-04-11 Shinagawa Refractories Co Nozzle to pay the molten metal.
FR2627715A1 (en) * 1988-02-26 1989-09-01 Vesuvius Sa CASTING BUSH FOR ASSISTED OPENING, INCORPORATING DEVICE AND METHOD FOR IMPLEMENTING THE SAME
US5072779A (en) * 1987-09-07 1991-12-17 Danieli & C. Officine Meccaniche Spa Continuous casting machine of a reduced height with immersed teeming nozzle
FR2683753A1 (en) * 1991-11-19 1993-05-21 Stopinc Ag SHUTTER PLATE FOR A DRAWER SHUTTER OF A TANK CONTAINING A BATH OF MOLTEN METAL.
WO2002047846A3 (en) * 2000-12-11 2003-03-06 Vesuvius Crucible Co Casting nozzle with gas injection means
EP3097997A1 (en) * 2015-05-28 2016-11-30 Sheffield Hi-Tech Refractories Germany GmbH Plug interacting with a base casting nozzle in a metallurgical vessel
WO2021060122A1 (en) * 2019-09-26 2021-04-01 黒崎播磨株式会社 Tundish nozzle structure and continuous casting method
WO2023047153A1 (en) * 2021-09-24 2023-03-30 Arcelormittal Leak-proof upper tundish nozzle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB834234A (en) * 1955-09-19 1960-05-04 Patentverwertung Ag Process and device for the production of high-quality castings
FR2167284A1 (en) * 1972-01-12 1973-08-24 Siderurgie Fse Inst Rech Avoiding casting hole blockages - by passing an oxidising agent through the casting hole wall
FR2169894A1 (en) * 1971-12-29 1973-09-14 Stoecker & Kunz Gmbh
US3773226A (en) * 1970-04-23 1973-11-20 Didier Werke Ag Container with sliding shutter for a liquid melt
DE2811546A1 (en) * 1977-03-18 1978-09-21 Sumitomo Metal Ind METHOD AND DEVICE FOR CONTINUOUS STEEL CASTING

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB834234A (en) * 1955-09-19 1960-05-04 Patentverwertung Ag Process and device for the production of high-quality castings
US3773226A (en) * 1970-04-23 1973-11-20 Didier Werke Ag Container with sliding shutter for a liquid melt
FR2169894A1 (en) * 1971-12-29 1973-09-14 Stoecker & Kunz Gmbh
FR2167284A1 (en) * 1972-01-12 1973-08-24 Siderurgie Fse Inst Rech Avoiding casting hole blockages - by passing an oxidising agent through the casting hole wall
DE2811546A1 (en) * 1977-03-18 1978-09-21 Sumitomo Metal Ind METHOD AND DEVICE FOR CONTINUOUS STEEL CASTING

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543576A1 (en) * 1983-03-30 1984-10-05 Messer Griesheim Gmbh METHOD AND INSTALLATION FOR SCANNING A METAL BATH FILLED IN PARTICULAR FROM STEEL IN A CASTING POUCH OR THE LIKE PROVIDED WITH A SHUTTER PLUG
WO1984004477A1 (en) * 1983-05-12 1984-11-22 James Menzies Thornton Composite refractory product
US4668554A (en) * 1983-05-12 1987-05-26 Thor Ceramics Limited Composite refractory product
FR2554024A1 (en) * 1983-11-02 1985-05-03 Didier Werke Ag IMMERSION CASTING BUSH
GB2148765A (en) * 1983-11-02 1985-06-05 Didier Werke Ag Immersion nozzle
EP0187924A1 (en) * 1984-11-26 1986-07-23 Cometus AG Process and ladle for gas purging molten metals
GB2173726A (en) * 1985-04-11 1986-10-22 Stopinc Ag Metallurgical discharge sleeves
BE1000818A3 (en) * 1986-11-13 1989-04-11 Shinagawa Refractories Co Nozzle to pay the molten metal.
US5072779A (en) * 1987-09-07 1991-12-17 Danieli & C. Officine Meccaniche Spa Continuous casting machine of a reduced height with immersed teeming nozzle
US5016788A (en) * 1988-02-26 1991-05-21 Vesuvius Crucible Company Pouring spout for servo-assisted opening, device incorporating it and implementation process
EP0332483A1 (en) * 1988-02-26 1989-09-13 Vesuvius France S.A. Nozzle for assisting orifice,device incorporated therein and method for method for carrying out
FR2627715A1 (en) * 1988-02-26 1989-09-01 Vesuvius Sa CASTING BUSH FOR ASSISTED OPENING, INCORPORATING DEVICE AND METHOD FOR IMPLEMENTING THE SAME
FR2683753A1 (en) * 1991-11-19 1993-05-21 Stopinc Ag SHUTTER PLATE FOR A DRAWER SHUTTER OF A TANK CONTAINING A BATH OF MOLTEN METAL.
WO2002047846A3 (en) * 2000-12-11 2003-03-06 Vesuvius Crucible Co Casting nozzle with gas injection means
EP3097997A1 (en) * 2015-05-28 2016-11-30 Sheffield Hi-Tech Refractories Germany GmbH Plug interacting with a base casting nozzle in a metallurgical vessel
WO2021060122A1 (en) * 2019-09-26 2021-04-01 黒崎播磨株式会社 Tundish nozzle structure and continuous casting method
JP2021049564A (en) * 2019-09-26 2021-04-01 黒崎播磨株式会社 Tundish upper nozzle structure and method of continuous casting
CN114040823A (en) * 2019-09-26 2022-02-11 黑崎播磨株式会社 Nozzle structure on tundish and continuous casting method
TWI770616B (en) * 2019-09-26 2022-07-11 日商黑崎播磨股份有限公司 Nozzle structure on liquid steel distributor and continuous casting method
WO2023047153A1 (en) * 2021-09-24 2023-03-30 Arcelormittal Leak-proof upper tundish nozzle

Also Published As

Publication number Publication date
DE3168852D1 (en) 1985-03-28
EP0059805B1 (en) 1985-02-13

Similar Documents

Publication Publication Date Title
US4360190A (en) Porous nozzle for molten metal vessel
EP0059805A1 (en) Porous nozzle for molten metal vessel
KR0170045B1 (en) Eddy current control device
US5083754A (en) Apparatus for retaining slag during the discharge of molten metal from a tundish
GB2200311A (en) Molten metal discharging device
GB2041182A (en) Method for blowing gas from below into a molten steel in refining vessel
JPH0857599A (en) Method and device for removing slag in tundish and continuous casting apparatus
EP0352346B1 (en) A submerged nozzle for steel casting
US5866022A (en) Refractory pour tube with cast plate
GB2149699A (en) Method and apparatus for avoiding vortexing in a bottom pour vessel
EP0315183B1 (en) Apparatus for pouring molten steel into a mold in continuous casting of steel
CA1141160A (en) Porous nozzle for molten metal vessel
JPS6372475A (en) Molten metal vessel provided with molten metal outflow port
US5295667A (en) Tundish baffle with fluted openings
JPH05293614A (en) Tundish injection tube
KR101909512B1 (en) Molten metal transfering apparatus
JPS59225862A (en) Immersion nozzle for continuous casting device
KR102361362B1 (en) Well block, apparatus for casting and method thereof
JPS6316856A (en) Molten metal container provided with molten metal outflow port
JPS6316855A (en) Weir of molten metal container with molten metal outlet
JPS632540A (en) Molten metal container with molten metal flow outlet
JP4145164B2 (en) Sliding gate plate
JPH052420B2 (en)
KR20230055193A (en) Stopper
KR101091955B1 (en) Molten steel tapping time delay apparatus

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): BE DE FR GB IT LU NL

17P Request for examination filed

Effective date: 19821116

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

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

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

Ref country code: DE

Payment date: 19850328

Year of fee payment: 5

REF Corresponds to:

Ref document number: 3168852

Country of ref document: DE

Date of ref document: 19850328

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

Ref country code: LU

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

Effective date: 19850331

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

Ref country code: NL

Payment date: 19850331

Year of fee payment: 5

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: DIDIER-WERKE AG

Effective date: 19850612

NLR1 Nl: opposition has been filed with the epo

Opponent name: DIDIER-WERKE AG

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

Ref country code: BE

Effective date: 19860331

BERE Be: lapsed

Owner name: ATO JUNICHI

Effective date: 19860331

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

Ref country code: NL

Effective date: 19861001

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: 19861128

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

Ref country code: DE

Effective date: 19861202

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
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: GB

Effective date: 19881121