US3684267A - Apparatus for introducing gas to hot metal in a bottom-pour vessel - Google Patents

Apparatus for introducing gas to hot metal in a bottom-pour vessel Download PDF

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Publication number
US3684267A
US3684267A US2224A US3684267DA US3684267A US 3684267 A US3684267 A US 3684267A US 2224 A US2224 A US 2224A US 3684267D A US3684267D A US 3684267DA US 3684267 A US3684267 A US 3684267A
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US
United States
Prior art keywords
gate
opening
vessel
block
nozzle
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Expired - Lifetime
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US2224A
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English (en)
Inventor
Sigmund L Andrzejak
Michael A Orehoski
James T Shapland
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United States Steel Corp
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United States Steel Corp
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Assigned to USX CORPORATION, A CORP. OF DE reassignment USX CORPORATION, A CORP. OF DE MERGER (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES STEEL CORPORATION (MERGED INTO)
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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
    • 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

  • ABSTRACT 2 9 A sliding g ate apparatus for the controlled pouring of 266/34 PP 3 5 1 75/49 hot metal into a continuous casting mold is dlsclosed.
  • the gate includes a vertical tubular opening for the in- 56] R f d troduction of gas to the hot metal.
  • a modification ine erences I e cludes a permeable refractory block positioned in the UNITED STATES PATENTS p 3,465,810 9/ l 969 Sylvester 164/66 9 Claims, 3 Drawing Figures /2 I Q i0 3;
  • This invention relates to an improved refractory closure apparatus through which gas can be introduced to molten metal in a bottom-pour vessel.
  • molten metal is poured from a ladle into an intermediate pouring vessel such as a tundish or degassing vessel and then into a mold.
  • the intermediate pouring vessel is usually recessed above the nozzle.
  • the metal that first reaches this recess has already lost much of its heat to the lining of the vessel. This rather quiescent metal settles into the recess, loses additional heat to its surroundings and begins to solidify.
  • the molten metal in the vessel above the recess does not contain sufficient superheat to remelt the solidified metal.
  • the present invention provides means to agitate the metal in the recess to prevent it from solidifying.
  • lnert gases are frequently introduced to molten metal to provide various treatments, such as degassing, stirring, and equalizing the metal temperature throughout the vessel. It is known to insufflate gas into a mass of molten metal through the vessel lining as shown in Spire U.S. Pat. No. 2,811,346, around the nozzle as shown in Griffiths and Orehoski U.S. Pat. No. 3,253,307 and through the stopper rod as shown in Saccomano U.S. Pat. No. 3,214,804. Further, it is known to use sliding gates on bottompour vessels, as shown in Shapland U.S. Pat. No. 3,352,465.
  • FIG. 1 is a cross-section through the nozzle of a bottom-pour vessel equipped with a sliding gate constructed in accordance with our invention.
  • FIG. 2 is a cross-section of an alternative sliding gate which employs a permeable refractory block in the gas passageway.
  • FIG. 3 is a cross-section of another sliding gate which has an alternative location for the gas connection.
  • FIG. 1 shows a portion of a bottom-pour vessel with a refractory lining 11 for receiving molten metal.
  • the bottom wall of the vessel has a well or recess 12 and an outlet opening 13 and carries a nozzle 14 fixed to its underside aligned with the opening.
  • a sliding gate closure member 15 is mounted beneath the nozzle.
  • the gate can be supported and operated in any desired manner; hence we have not shown the supporting and operating mechanism.
  • the gate includes a solid refractory portion 16 having a centrally located vertical opening 17 and is covered on its sides and bottom by a steel jacket 18.
  • a pipe 19 communicates with opening 17 and is affixed therein. Opening 17 may be threaded to receive the pipe.
  • a source of gas is connected to pipe 19 through a nipple 20.
  • gate 15 When vessel 10 is prepared to receive molten metal, gate 15 is placed into the position shown and gas flow is started through the gate into the nozzle region of the vessel. Molten metal is then poured into the vessel. Gas flow into the nozzle region prevents metal from entering opening 17 and prevents solidification of metal in well 12, outlet 13 or nozzle 14 by agitating the metal.
  • the alternative sliding gate configuration of FIG. 2 includes a permeable refractory block 25 centered in the upper portion of gate 15.
  • Pipe 19 is affixed at its upper end to annular steel shell 26 which forms, with block 25, a cylindrical chamber 27 for distributing the gas evenly over the base of block 25.
  • Block 25 is preferably a frustum of a cone, but could be a frustum of a pyramid or other suitable geometric shape. Since refractory 16 is dense and of low permeability, it serves to contain the gas in block 25 and force virtually all of the gas throughblock 25 into the molten metal.
  • Figure 3 shows an alternative location for the introduction of gas, that being through the side of the gate rather than through the bottom. Where space is limited between the pouring nozzle and a mold beneath it, this gate offers a decided advantage.
  • cylindrical chamber 27 is formed by tube 28 and extends from the bottom of jacket 18 to the bottom of block 25.
  • Pipe 19a is positioned horizontally in the gate.
  • the gates of our invention perform in the same manner as a regular closure gate in physically stopping the flow of molten metal, yet perform the additional function of stirring or agitating the molten metal in the nozzle region, thus preventing solidification of the metal in this region prior to the beginning of the pour.
  • the gate of either FIG. 2 or 3 has the additional capability of performing as a regular closure gate regardless of whether the gas flow has begun. If the permeable block becomes plugged or is penetrated by molten metal, the gate can easily be replaced by a fresh gate.
  • a slide-through gate for closing the pouring nozzle of a molten-metal containing bottom-pour vessel, said gate comprising a refractory body having an opening, and means connected to said gate and communicating with said opening for introducing gas to the vessel.
  • a gate as defined in claim 1 further comprising a permeable refractory block occupying a portion of said opening.
  • a gate as defined in claim 2 further comprising a chamber beneath said block, said opening being vertical and centered in said gate and means for affixing a pipe in said opening.
  • a gate as defined in claim 2 further comprising a chamber beneath said block, said opening having a horizontal segment with means for affixing a pipe therein.
  • a combination as defined in claim 5 characterized by a central vertical opening in said gate, a gas supply, and a tubular connection therebetween.
  • a combination as defined in claim 5 further comprising an impermeable metal jacket covering the bottom and sides of said gate.
US2224A 1970-01-12 1970-01-12 Apparatus for introducing gas to hot metal in a bottom-pour vessel Expired - Lifetime US3684267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US222470A 1970-01-12 1970-01-12

Publications (1)

Publication Number Publication Date
US3684267A true US3684267A (en) 1972-08-15

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ID=21699782

Family Applications (1)

Application Number Title Priority Date Filing Date
US2224A Expired - Lifetime US3684267A (en) 1970-01-12 1970-01-12 Apparatus for introducing gas to hot metal in a bottom-pour vessel

Country Status (9)

Country Link
US (1) US3684267A (de)
BE (1) BE761390A (de)
CA (1) CA941129A (de)
DE (1) DE2100471A1 (de)
ES (1) ES387145A1 (de)
FR (1) FR2076057B1 (de)
GB (1) GB1349591A (de)
NL (1) NL7100259A (de)
ZA (1) ZA7118B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809146A (en) * 1972-02-18 1974-05-07 Steel Corp Method of opening an intermediate vessel nozzle for continuous casting
JPS50126714U (de) * 1974-04-03 1975-10-17
US3918613A (en) * 1973-03-01 1975-11-11 United States Steel Corp Sliding gate having selectively operable gas line for porous plug
DE3404836A1 (de) * 1983-02-16 1984-08-23 Toshiba Ceramics Co., Ltd., Tokio/Topkyo Absperrschieber einer giesspfanne oder eines aehnlichen behaelters
US4702460A (en) * 1983-12-16 1987-10-27 Didier-Werke Ag Reversible refractory plate in sliding closure unit and method for use thereof
US5004131A (en) * 1990-04-16 1991-04-02 Bethlehem Steel Corporation Molten metal slide gate valve

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825241A (en) * 1973-10-26 1974-07-23 Steel Corp Apparatus for introducing gas to hot metal in a bottom pour vessel
GB1575601A (en) * 1976-01-22 1980-09-24 Didier Werke Ag Refractory structures for outlet valves for metallurgical vessels
FR2414076A1 (fr) * 1978-01-09 1979-08-03 British Steel Corp Procede d'affinage de metal a l'etat liquide
AT359100B (de) * 1978-04-25 1980-10-27 Inteco Int Techn Beratung Anordnung zur behandlung von stahlschmelzen in der pfanne durch bodenblasen
JPS54158331A (en) * 1978-06-05 1979-12-14 Aikoh Co Tundish for continuous steel casting
DE2836409C2 (de) * 1978-08-19 1982-07-22 Stopinc AG, Zug Vorrichtung zum Einführen von Behandlungsstoffen in die in einem metallurgischen Gefäß enthaltene Schmelze
GB2059558B (en) * 1979-09-27 1983-02-16 Vesuvius Int Corp Avoiding blocking of metal pouring vessels
CA1141174A (en) * 1979-10-31 1983-02-15 Guy Savard Homogenization of metal using gas
FR2533473A1 (fr) * 1982-09-28 1984-03-30 Detalle Richard Mode de controle et d'ouverture des orifices de coulee des recipients conteneurs de metaux liquides et autres, et dispositif de mise en oeuvre

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US133690A (en) * 1872-12-03 Improvement in refining iron and steel in
FR1146218A (fr) * 1955-09-19 1957-11-07 Patentverwertung Ag Procédé et dispositif de fabrication de pièces coulées
CA577247A (en) * 1959-06-09 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Proced Es Georges Claude Apparatus for gas-flushing molten metals
US2921351A (en) * 1956-11-01 1960-01-19 Momm Werner Wilhelm Ladle flow control device
US3083422A (en) * 1959-04-13 1963-04-02 Finkl & Sons Co Porous stopper rod
US3337329A (en) * 1964-01-20 1967-08-22 Finkl & Sons Co Method of treating molten metal under vacuum
US3352465A (en) * 1965-05-06 1967-11-14 United States Steel Corp Refractory closure member for bottom pour vessels
US3465810A (en) * 1967-12-04 1969-09-09 Sylvester Enterprises Inc Apparatus for casting metal
US3581948A (en) * 1969-08-11 1971-06-01 Interstop Ag Sliding gate of a casting ladle for pouring liquid metals

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH478613A (de) * 1968-07-12 1969-09-30 Interstop Ag Schiebeverschluss für mit einer Bodenausgussöffnung versehene Behälter zum Giessen von flüssigen Metallen, insbesondere Stahl

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US133690A (en) * 1872-12-03 Improvement in refining iron and steel in
CA577247A (en) * 1959-06-09 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Proced Es Georges Claude Apparatus for gas-flushing molten metals
FR1146218A (fr) * 1955-09-19 1957-11-07 Patentverwertung Ag Procédé et dispositif de fabrication de pièces coulées
US2921351A (en) * 1956-11-01 1960-01-19 Momm Werner Wilhelm Ladle flow control device
US3083422A (en) * 1959-04-13 1963-04-02 Finkl & Sons Co Porous stopper rod
US3337329A (en) * 1964-01-20 1967-08-22 Finkl & Sons Co Method of treating molten metal under vacuum
US3352465A (en) * 1965-05-06 1967-11-14 United States Steel Corp Refractory closure member for bottom pour vessels
US3465810A (en) * 1967-12-04 1969-09-09 Sylvester Enterprises Inc Apparatus for casting metal
US3581948A (en) * 1969-08-11 1971-06-01 Interstop Ag Sliding gate of a casting ladle for pouring liquid metals

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809146A (en) * 1972-02-18 1974-05-07 Steel Corp Method of opening an intermediate vessel nozzle for continuous casting
US3918613A (en) * 1973-03-01 1975-11-11 United States Steel Corp Sliding gate having selectively operable gas line for porous plug
JPS50126714U (de) * 1974-04-03 1975-10-17
JPS5226494Y2 (de) * 1974-04-03 1977-06-16
DE3404836A1 (de) * 1983-02-16 1984-08-23 Toshiba Ceramics Co., Ltd., Tokio/Topkyo Absperrschieber einer giesspfanne oder eines aehnlichen behaelters
US4702460A (en) * 1983-12-16 1987-10-27 Didier-Werke Ag Reversible refractory plate in sliding closure unit and method for use thereof
US5004131A (en) * 1990-04-16 1991-04-02 Bethlehem Steel Corporation Molten metal slide gate valve

Also Published As

Publication number Publication date
DE2100471A1 (de) 1971-07-22
CA941129A (en) 1974-02-05
FR2076057B1 (de) 1976-12-10
ZA7118B (en) 1971-10-27
NL7100259A (de) 1971-07-14
FR2076057A1 (de) 1971-10-15
ES387145A1 (es) 1973-05-01
BE761390A (fr) 1971-07-08
GB1349591A (en) 1974-04-03

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Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)

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Owner name: USX CORPORATION, A CORP. OF DE, STATELESS

Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960

Effective date: 19880112