EP0171589B1 - Collector nozzle in a device for controlling the outflow of cast steel from a ladle or from a tundish - Google Patents
Collector nozzle in a device for controlling the outflow of cast steel from a ladle or from a tundish Download PDFInfo
- Publication number
- EP0171589B1 EP0171589B1 EP85108394A EP85108394A EP0171589B1 EP 0171589 B1 EP0171589 B1 EP 0171589B1 EP 85108394 A EP85108394 A EP 85108394A EP 85108394 A EP85108394 A EP 85108394A EP 0171589 B1 EP0171589 B1 EP 0171589B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- inert gas
- hole
- insert
- outflow
- 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
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
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
-
- 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
Definitions
- This present invention concerns a collector nozzle in a divice for controlling the outflow of cast steel from a ladle or from a tundish according to the preamble of claim 1 or claim 2, respectively.
- the steel flow is protected by a pipe along its length between exit from the nozzle and entry into the mold or into the tundish.
- the collector nozzle for a ladle is the nozzle in a mobile part of a slide gate valve; consequently in most cases, but not necessarily, the collector nozzle is made of refractory material known in this technical field, and hereinafter it will simply be called the nozzle.
- the GB-A-2 094 454 shows a union block, between the lower end of the collector nozzle and the upper end of the protecting tube, for leading compressed air from a source of compressed air to an annular orifice open in the lower part of the union block, through a gas manifold surrounding the union block.
- a unitary nozzle component having a manifold space and orifices at its downstream end is provided.
- the FR-A-2 252 157 shows a nozzle made of permeable, porous material comprising a part connecting an external duct carrying inert gas from a source of inert gas under pressure with a space inside said nozzle into which the gas penetrates and spreads through the pores in the nozzle emerging through the wall of the hole for outflow of steel.
- Direct porosity is a conventional term indicating that certain techniques have been used to create, in a non-porous body, small ducts lying in one or more desired directions, while random porosity indicates the porosity existing throughout the whole of a refractory porous body where the pores lie in all possible directions.
- the techniques used to create direct porosity in a piece of material are explained in the European patent publication No 0083919 in the name of ODDisch - Amerikanische Magnesit Aktien.
- the nozzle in order to carry the inert gas into the desired area, the nozzle is made so as to indicate the necessary ducts; in the second case, to carry the inert gas to the desired area, use will be made of porous materials, or sections of materials, mounted in the mass of refractory material forming the nozzle.
- a randomly-porous nozzle incorporates at least one main duct passing round the nozzle hole for outflow of the steel connected with a source of inert gas and with a plurality of secondary ducts leading to the lower end of the nozzle for delivering inert gas at the top of a downstream located protector pipe and a second plurality of secondary ducts connecting each of said main ducts with said hole for delivering into said hole said gas providing a protective gas jacket.
- the nozzle comprises a conecting part between each of the above main ducts and an external duct carrying inert gas from a source of inert gas under pressure and comprises devices for controlling entry and pressure of the inert gas.
- the nozzle may comprise a first main duct and a first plurality of secondary ducts connecting the first main duct with the above hole, and comprises a second main duct and a further second plurality of secondary ducts connecting the second main duct with the environment outside the nozzle at the latter's lower end.
- the nozzle comprises two parts for connection to said external duct, one for each main duct, and two devices for controlling entry and pressure of the inert gas, one for each main duct.
- a nozzle is made of non-porous material comprising an insert of randomly-porous material in the form of a circular crown coaxial with the longitudinal axis of the hole for outflow of steel, in the desired position along said longitudinal axis, a part connecting an external duct carrying inert gas from a source of inert gas under pressure there being a space inside said insert of randomly-porous material and a cavity, all round the lower portion of the nozzle, in which there is a circular aperture at the level of the lower horizontal wall of the nozzle for connecting the cavity with the environment outside the nozzle and comprises a part connecting the cavity with the above external duct, the purpose of all this being to produce a flow of inert gas inside a part of said hole through the inner wall of said insert and a flow of inert gas at the lower end of the nozzle.
- the lower end of the nozzle made of non-porous material is formed of an insert of randomly-porous material and the above cavity is closed at the bottom as well as at the top so that inert gas also flows through the entire lower end of the nozzle.
- the nozzle conforming to this present invention allows inert gas flowing through said nozzle under pressure to reach the area outside the nozzle where said nozzle fits into the protection pipe thus creating in that area overpressure of inert gas that prevents entry of air through the fissures where the mouth of the nozzle enters the protection pipe and allows inert gas flowing under pressure through said nozzle to enter the hole in the nozzle in the area of said hole where deposits would form, to prevent their formation.
- Fig. 1 shows part of a ladle slide gate valve 1 comprising a nozzle 2 held withion a metal frame 3 with an interposed layer of suitable cement 4, and a hole 5 for outflow of steel from a ladle.
- the lower end of the nozzle 2 fits into a pipe 6 placed to protect the cast steel and incorporates a main ringwise duct 7 that is taken outside the nozzle through a segment of tube 8 connected to the duct 9 carrying argon under pressure from a source 10.
- Duct 9 is opened and closed and gas pressure regulated by a control device 11.
- a plurality of secondary ducts 12, 13 lead off from the main duct 7.
- Ducts 12 connect duct 7 with the area of the hole 5, where deposits form, and ducts 13 connect duct 7 with the outside of the nozzle at the top of protection tube 6.
- the exit to ducts 13 is in the lower horizontal wall of the nozzle so that the argon is blown into the spaces 14 bounded by the nozzle's outer wall, by the inner wall of the protection tube 6 and by the wall enclosing the cast steel 15.
- Fig. 2 shows a nozzle 22 of non-porous refractory material comprising: an insert 40 of randomly-porous refractory material in the form of a circular crown placed in the area of the hole for outflow of steel where the aluminium oxides create deposits, insert 40 comprising a space 41 that functions as a collector of the argon brought in under pressure along the duct 29 that passes through the body of the nozzle and opens into said space; a cavity 42, formed between a steel liner 43 and the outer steel frame 44 of the nozzle closed at the top and having a circular aperture 45 at the level of the horizontal lower wall of the nozzle.
- Duct 29 has a branch 29A that penetrates into the cavity 42 and comprises an aperture 46 through which the argon enters.
- insert 40 through the pores of its material the gas under pressure enters the hole 47, entry of gas being conventionally indicated by the arrows F1; the non-porous material adjacent to faces A, B, C, of the insert prevents the gas from spreading into the body of the nozzle.
- cavity 42 gas under pressure arrives through aperture 45 in the region 48 bounded by the internal wall of the protection pipe 26, by the lower end of the nozzle 22 and by the surface of the cast steel, not shown in the figure, thus creating overpressure in this region that prevents air from entering through the fissure 49, entry of gas being conventionally indicated by the arrows F2.
- Fig. 3 shows a nozzle 32 made of non-porous refractory material comprising an insert 40 of randomly-porous refractory material and a duct 29 having a branch 29A and a cavity 42 exactly the same as the corresponding parts illustrated in Fig. 2, except that the cavity 42 is completely closed round the frame 44 and at the lower end of the nozzle 32.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
Description
- This present invention concerns a collector nozzle in a divice for controlling the outflow of cast steel from a ladle or from a tundish according to the preamble of claim 1 or
claim 2, respectively. - To prevent pollution by the oxygen in the air of cast steel flowing through a collector nozzle in a ladle towards a mold or towards a tundish, the steel flow is protected by a pipe along its length between exit from the nozzle and entry into the mold or into the tundish.
- As however the fit between nozzle and protection pipe is never airtight, the cast steel itself draws air into the pipe. In addition to the technical problems referred to above, there is another of a different nature. In most cases, but not necessarily, the collector nozzle for a ladle is the nozzle in a mobile part of a slide gate valve; consequently in most cases, but not necessarily, the collector nozzle is made of refractory material known in this technical field, and hereinafter it will simply be called the nozzle. When aluminium steels are being cast, and the nozzle is made of refractory material, it happens that the aluminium contained in the steel becomes deposited in the form of oxides on the refractory sides of the hole of the nozzle to a point where the hole through which the steel passes is completely choked. The problem therefore exists of how to prevent formation of aluminium oxides in the hole of the nozzle of a ladle or of a tundish.
- The GB-A-2 094 454 shows a union block, between the lower end of the collector nozzle and the upper end of the protecting tube, for leading compressed air from a source of compressed air to an annular orifice open in the lower part of the union block, through a gas manifold surrounding the union block. Alternatively, a unitary nozzle component having a manifold space and orifices at its downstream end is provided. The FR-A-2 252 157 shows a nozzle made of permeable, porous material comprising a part connecting an external duct carrying inert gas from a source of inert gas under pressure with a space inside said nozzle into which the gas penetrates and spreads through the pores in the nozzle emerging through the wall of the hole for outflow of steel. In the GB-A-2094454 only the hole surface of the protecting tube is protected by the air flow whilst the hole surface of the collector nozzle is not. In the FR-A-2 252 157 only the hole surface of the collector nozzle is protected by the gas flow emerging through the wall thereof and possibly the efficacy of the gas flow all along the hole length is not so high due to the resistance of the porous material.
- The above problems are solved by the features of
claim 1 and 2, respectively. - Direct porosity is a conventional term indicating that certain techniques have been used to create, in a non-porous body, small ducts lying in one or more desired directions, while random porosity indicates the porosity existing throughout the whole of a refractory porous body where the pores lie in all possible directions. The techniques used to create direct porosity in a piece of material are explained in the European patent publication No 0083919 in the name of Osterreichisch - Amerikanische Magnesit Aktien. In the first case, in order to carry the inert gas into the desired area, the nozzle is made so as to indicate the necessary ducts; in the second case, to carry the inert gas to the desired area, use will be made of porous materials, or sections of materials, mounted in the mass of refractory material forming the nozzle.
- According to one embodiment of the invention a randomly-porous nozzle incorporates at least one main duct passing round the nozzle hole for outflow of the steel connected with a source of inert gas and with a plurality of secondary ducts leading to the lower end of the nozzle for delivering inert gas at the top of a downstream located protector pipe and a second plurality of secondary ducts connecting each of said main ducts with said hole for delivering into said hole said gas providing a protective gas jacket.
- The nozzle comprises a conecting part between each of the above main ducts and an external duct carrying inert gas from a source of inert gas under pressure and comprises devices for controlling entry and pressure of the inert gas. The nozzle may comprise a first main duct and a first plurality of secondary ducts connecting the first main duct with the above hole, and comprises a second main duct and a further second plurality of secondary ducts connecting the second main duct with the environment outside the nozzle at the latter's lower end. In this alternative the nozzle comprises two parts for connection to said external duct, one for each main duct, and two devices for controlling entry and pressure of the inert gas, one for each main duct.
- According to an another embodiment a nozzle is made of non-porous material comprising an insert of randomly-porous material in the form of a circular crown coaxial with the longitudinal axis of the hole for outflow of steel, in the desired position along said longitudinal axis, a part connecting an external duct carrying inert gas from a source of inert gas under pressure there being a space inside said insert of randomly-porous material and a cavity, all round the lower portion of the nozzle, in which there is a circular aperture at the level of the lower horizontal wall of the nozzle for connecting the cavity with the environment outside the nozzle and comprises a part connecting the cavity with the above external duct, the purpose of all this being to produce a flow of inert gas inside a part of said hole through the inner wall of said insert and a flow of inert gas at the lower end of the nozzle.
- Preferably, the lower end of the nozzle made of non-porous material is formed of an insert of randomly-porous material and the above cavity is closed at the bottom as well as at the top so that inert gas also flows through the entire lower end of the nozzle.
- The nozzle conforming to this present invention allows inert gas flowing through said nozzle under pressure to reach the area outside the nozzle where said nozzle fits into the protection pipe thus creating in that area overpressure of inert gas that prevents entry of air through the fissures where the mouth of the nozzle enters the protection pipe and allows inert gas flowing under pressure through said nozzle to enter the hole in the nozzle in the area of said hole where deposits would form, to prevent their formation.
- The invention is explained in greater detail herebelow aided by drawings showing examples of its realization, in which:
- Fig. 1 is a side view, partially cut away, of a first execution,
- Fig. 2 is a side view, partially cut away, of a second execution,
- Fig. 3 is a side view, partially cut away, of a third execution.
- Fig. 1 shows part of a ladle slide gate valve 1 comprising a
nozzle 2 held withion ametal frame 3 with an interposed layer ofsuitable cement 4, and a hole 5 for outflow of steel from a ladle. The lower end of thenozzle 2 fits into a pipe 6 placed to protect the cast steel and incorporates a mainringwise duct 7 that is taken outside the nozzle through a segment oftube 8 connected to the duct 9 carrying argon under pressure from asource 10. Duct 9 is opened and closed and gas pressure regulated by acontrol device 11. A plurality ofsecondary ducts main duct 7.Ducts 12 connectduct 7 with the area of the hole 5, where deposits form, andducts 13 connectduct 7 with the outside of the nozzle at the top of protection tube 6. The exit toducts 13 is in the lower horizontal wall of the nozzle so that the argon is blown into thespaces 14 bounded by the nozzle's outer wall, by the inner wall of the protection tube 6 and by the wall enclosing thecast steel 15. - Fig. 2 shows a
nozzle 22 of non-porous refractory material comprising: aninsert 40 of randomly-porous refractory material in the form of a circular crown placed in the area of the hole for outflow of steel where the aluminium oxides create deposits,insert 40 comprising aspace 41 that functions as a collector of the argon brought in under pressure along theduct 29 that passes through the body of the nozzle and opens into said space; acavity 42, formed between asteel liner 43 and theouter steel frame 44 of the nozzle closed at the top and having acircular aperture 45 at the level of the horizontal lower wall of the nozzle. - Duct 29 has a
branch 29A that penetrates into thecavity 42 and comprises anaperture 46 through which the argon enters. As regards insert 40, through the pores of its material the gas under pressure enters thehole 47, entry of gas being conventionally indicated by the arrows F1; the non-porous material adjacent to faces A, B, C, of the insert prevents the gas from spreading into the body of the nozzle. With regard tocavity 42, gas under pressure arrives throughaperture 45 in theregion 48 bounded by the internal wall of theprotection pipe 26, by the lower end of thenozzle 22 and by the surface of the cast steel, not shown in the figure, thus creating overpressure in this region that prevents air from entering through thefissure 49, entry of gas being conventionally indicated by the arrows F2. - Fig. 3 shows a
nozzle 32 made of non-porous refractory material comprising aninsert 40 of randomly-porous refractory material and aduct 29 having abranch 29A and acavity 42 exactly the same as the corresponding parts illustrated in Fig. 2, except that thecavity 42 is completely closed round theframe 44 and at the lower end of thenozzle 32. - At the lower end of the nozzle there is an
insert 50 of randomly-porous refractory material whose upper surface is adjacent to the non-porous material, the outer lateral surface being comprised within thecavity 42, the inner lateral surface forming the terminating portion of the hole 47.and the lower surface opening into theregion 48 bounded as already described with reference to Fig. 2. It is therefore clear that the gas passing throughduct 29 will penetrate through theinsert 40 into thehole 47, as already described with reference to Fig. 2, and will penetrate through theinsert 50 partly in the terminating portion ofhole 47, overcoming the pressure of the steel, and partly in the saidregion 48 where entry of gas is conventionally indicated by the arrows F2.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85108394T ATE33952T1 (en) | 1984-07-18 | 1985-07-06 | COLLECTOR SPOUT IN DEVICE FOR CONTROLLING THE FLOW OF LIQUID STEEL FROM A LADLE OR STOCK VESSEL. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2194884 | 1984-07-18 | ||
IT21948/84A IT1176428B (en) | 1984-07-18 | 1984-07-18 | OUTLET SLEEVE IN A DEVICE TO CONTROL THE STEEL FLOW MELTED FROM A LADLE OR A BASKET |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0171589A1 EP0171589A1 (en) | 1986-02-19 |
EP0171589B1 true EP0171589B1 (en) | 1988-05-04 |
Family
ID=11189255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85108394A Expired EP0171589B1 (en) | 1984-07-18 | 1985-07-06 | Collector nozzle in a device for controlling the outflow of cast steel from a ladle or from a tundish |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0171589B1 (en) |
JP (1) | JPS6133745A (en) |
AT (1) | ATE33952T1 (en) |
DE (1) | DE3562461D1 (en) |
IT (1) | IT1176428B (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2179573A (en) * | 1985-08-29 | 1987-03-11 | British Steel Corp | Metal-pouring equipment modified for protective gas injection |
EP0293564A2 (en) * | 1987-06-05 | 1988-12-07 | Stopinc Aktiengesellschaft | Method for feeding flushing gas into a discharge hole with a slide gate nozzle for metallurgical vessels |
BE1000818A3 (en) * | 1986-11-13 | 1989-04-11 | Shinagawa Refractories Co | Nozzle to pay the molten metal. |
FR2639267A1 (en) * | 1988-11-23 | 1990-05-25 | Clecim Sa | PROCESS AND ASSEMBLY FOR SUPPLYING MOLTEN METAL TO THE LINGOTIERE OF A CONTINUOUS CASTING INSTALLATION OF THIN BLANKS |
EP0373555A2 (en) * | 1988-12-14 | 1990-06-20 | NUOVA SIRMA S.p.A. | Improvement in processes and devices for the continuous casting of metals |
EP0385617A1 (en) * | 1989-02-17 | 1990-09-05 | The Carborundum Company | Injecting gas into molten metal |
US5613545A (en) * | 1991-11-12 | 1997-03-25 | Shinagawa Refractories Co. Ltd. | Inert gas injecting plate brick or insert nozzle brick for use in a sliding gate valve apparatus of molten metal |
GB2313076A (en) * | 1996-05-17 | 1997-11-19 | Akechi Ceramics Kk | Long nozzle with gas passages for continuous casting |
WO2000029147A1 (en) * | 1998-11-13 | 2000-05-25 | Messer Austria Gmbh | Method and device for regulating pouring streams |
WO2001083138A1 (en) * | 2000-04-28 | 2001-11-08 | Vesuvius Crucible Company | Refractory component and assembly with improved sealing for injection of an inert gas |
US6450376B1 (en) | 1996-10-17 | 2002-09-17 | Vesuvius Crucible Company | Refractory assemblies |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3624320A1 (en) * | 1986-07-18 | 1988-01-28 | Dahlhoff Friedrich Wilhelm | Sealing of casting equipment by means of protective gas supply |
JPH0342351U (en) * | 1989-08-29 | 1991-04-22 | ||
JPH03126273U (en) * | 1990-03-28 | 1991-12-19 | ||
WO1993025333A1 (en) * | 1992-06-18 | 1993-12-23 | Shinagawa Refractories Co., Ltd. | Refractory block for continuous casting |
FR2757431B1 (en) * | 1996-12-20 | 1999-02-12 | Vesuvius France Sa | LIQUID METAL TRANSFER INSTALLATION, METHOD OF IMPLEMENTATION, AND REFRACTORIES |
CN103350222A (en) * | 2013-07-12 | 2013-10-16 | 抚顺特殊钢股份有限公司 | Novel argon gas protecting device for die casting |
CN108127110B (en) * | 2017-02-28 | 2023-06-09 | 安徽工业大学 | Molten steel transferring device capable of protecting tapping and electric furnace steelmaking system capable of protecting tapping |
US11117187B2 (en) * | 2017-06-20 | 2021-09-14 | Krosakiharima Corporation | Casting nozzle |
CN112404377A (en) * | 2020-11-20 | 2021-02-26 | 二重(德阳)重型装备有限公司 | Molten steel bottom pouring injection pipe assembly and pouring method thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1492533A (en) * | 1973-11-23 | 1977-11-23 | Flogates Ltd | Pouring of metals |
DE2517834A1 (en) * | 1975-04-22 | 1976-11-04 | Linde Ag | Continuous casting plant using double gas curtain - to protect molten metal flowing from ladle into mould. |
FR2490123A1 (en) * | 1980-09-15 | 1982-03-19 | Air Liquide | PLATE SHUTTER DEVICE FOR CONTAINER CASTING HOLES CONTAINING A FUSION METAL |
GB2094454B (en) * | 1981-03-03 | 1984-09-19 | Flogates Ltd | Improvements in the pouring of molten metals |
-
1984
- 1984-07-18 IT IT21948/84A patent/IT1176428B/en active
- 1984-12-27 JP JP27426884A patent/JPS6133745A/en active Pending
-
1985
- 1985-07-06 EP EP85108394A patent/EP0171589B1/en not_active Expired
- 1985-07-06 AT AT85108394T patent/ATE33952T1/en not_active IP Right Cessation
- 1985-07-06 DE DE8585108394T patent/DE3562461D1/en not_active Expired
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2179573A (en) * | 1985-08-29 | 1987-03-11 | British Steel Corp | Metal-pouring equipment modified for protective gas injection |
BE1000818A3 (en) * | 1986-11-13 | 1989-04-11 | Shinagawa Refractories Co | Nozzle to pay the molten metal. |
EP0293564A2 (en) * | 1987-06-05 | 1988-12-07 | Stopinc Aktiengesellschaft | Method for feeding flushing gas into a discharge hole with a slide gate nozzle for metallurgical vessels |
EP0293564A3 (en) * | 1987-06-05 | 1989-10-11 | Stopinc Aktiengesellschaft | Method for feeding flushing gas into a discharge hole with a slide gate nozzle for metallurgical vessels |
US5174360A (en) * | 1988-11-23 | 1992-12-29 | Institut De Recherches De La Siderurgie Francaise | Process and assembly for feeding molten metal to the ingot mold of an installation for the continuous casting of thin cogs |
EP0370934A1 (en) * | 1988-11-23 | 1990-05-30 | Institut De Recherches De La Siderurgie Francaise (Irsid) | Method of and device for alimentation of an ingot mold with molten metal in a continuous casting installation for thin blooms |
FR2639267A1 (en) * | 1988-11-23 | 1990-05-25 | Clecim Sa | PROCESS AND ASSEMBLY FOR SUPPLYING MOLTEN METAL TO THE LINGOTIERE OF A CONTINUOUS CASTING INSTALLATION OF THIN BLANKS |
EP0373555A2 (en) * | 1988-12-14 | 1990-06-20 | NUOVA SIRMA S.p.A. | Improvement in processes and devices for the continuous casting of metals |
EP0373555A3 (en) * | 1988-12-14 | 1991-11-21 | NUOVA SIRMA S.p.A. | Improvement in processes and devices for the continuous casting of metals |
EP0385617A1 (en) * | 1989-02-17 | 1990-09-05 | The Carborundum Company | Injecting gas into molten metal |
US5613545A (en) * | 1991-11-12 | 1997-03-25 | Shinagawa Refractories Co. Ltd. | Inert gas injecting plate brick or insert nozzle brick for use in a sliding gate valve apparatus of molten metal |
GB2313076A (en) * | 1996-05-17 | 1997-11-19 | Akechi Ceramics Kk | Long nozzle with gas passages for continuous casting |
US6450376B1 (en) | 1996-10-17 | 2002-09-17 | Vesuvius Crucible Company | Refractory assemblies |
WO2000029147A1 (en) * | 1998-11-13 | 2000-05-25 | Messer Austria Gmbh | Method and device for regulating pouring streams |
WO2001083138A1 (en) * | 2000-04-28 | 2001-11-08 | Vesuvius Crucible Company | Refractory component and assembly with improved sealing for injection of an inert gas |
Also Published As
Publication number | Publication date |
---|---|
IT8421948A0 (en) | 1984-07-18 |
DE3562461D1 (en) | 1988-06-09 |
ATE33952T1 (en) | 1988-05-15 |
EP0171589A1 (en) | 1986-02-19 |
IT1176428B (en) | 1987-08-18 |
JPS6133745A (en) | 1986-02-17 |
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