US3550924A - Mechanism for controlling flow of liquid to a vacuum-treating vessel - Google Patents

Mechanism for controlling flow of liquid to a vacuum-treating vessel Download PDF

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Publication number
US3550924A
US3550924A US781929A US3550924DA US3550924A US 3550924 A US3550924 A US 3550924A US 781929 A US781929 A US 781929A US 3550924D A US3550924D A US 3550924DA US 3550924 A US3550924 A US 3550924A
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US
United States
Prior art keywords
vessel
gate
tundish
vacuum
outlet
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Expired - Lifetime
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US781929A
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English (en)
Inventor
John A Grosko
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United States Steel Corp
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United States Steel Corp
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Publication date
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • 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
    • B22D41/24—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 characterised by a rectilinearly movable plate
    • 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

Definitions

  • sliding gates adapted to be positioned between the inlet of a vacuum-treating vessel and the outlet of a container for feeding liquid to the vessel.
  • One of the gates is formed of two parts which are separable. The upper of the two parts is retained on [51] Int. C2lc 7/10 the bottom of the container to close the outlet when the container is removed from the vessel.
  • the vacuum in the vessel holds the lower part over the inlet 0 so Fieldorsearch..................;.........'........l. «
  • This invention relates to an improved mechanism for controlling flow of liquid to a vacuum-treating vessel.
  • my invention is not thus limited, the mechanism is particularly useful for controlling flow of molten steel into a vacuumdegassing vessel.
  • the usualpractice in degassing molten steel is to teem the steel from a ladle into a refractory-lined tundish and to teem the steel to thedegassing vessel through an outlet in the bottom of the tundish.
  • the steel in the tundish carries a layer of molten slag which protects its surface against oxidation.
  • the tundish outlet is closed to exclude slag from the degassing vessel, where it would contaminate the steel and also damage the refractory lining.
  • the tundish then is removed from the degassing vessel. The refractory lining of the tundish and its contents are sacrificed.
  • the gate has been formed of sections slidably mounted in guides on the outside of the bottom wall of the tundish. Certain of the gate sections form closures for the outlet, while others have nozzles to allow steel to flow.
  • the tundish has carried a hydraulic cylinder or a mechanical device for selectively moving the different gate sections into alignment with the outlet. This arrangement has disadvantages that it does notpermit the tundish to be removed from the degassing vessel without breaking the vacuum, and further that it is awkward to handle a tundish which carries a hydraulic cylinder and connections for admitting and discharging hydraulic fluid.
  • An object of my invention is to provide an improved flowcontrolling mechanism which enables liquid to feed to a vacuum-treating vessel, yet allows the source of liquid removed from the vessel at any time without breaking the vacuum.
  • a further object is to provide an improved flow-controlling mechanism of the foregoing type in which the operating means is mounted on the vacuum-treating vessel, thereby avoiding the need for connections such as hoses on the portable source of liquid.
  • a more specific object is to provide a sliding gate closure for controlling feeding of molten steel from a tundish to a vacuum-degassing vessel, which closure enables the tundish outlet to be closed and the tundish removed from the vessel without breaking the vacuum.
  • a further object is to provide a two-part sliding gate for closing a source of liquid feeding to a vacuum-treating vessel, one of which parts remains with the vessel and forms a seal when the source is taken away, the other part of which serves to close the outlet of the source.
  • FIG. 1 is a vertical sectional view of a vacuum-degassing vessel, 21 tundish positioned to feed molten metal thereto, and a flow-controlling mechanism constructed in accordance with my invention:
  • FIG. 2 is a horizontal section on a larger scale on line II-II of FIG. 1;
  • FIG. 3 is a vertical section on line III-III of FIG. 2;
  • FIG. 4 is a vertical section on line IV-IV of FIG. 2, but showing the two-part gate of my invention closing the tundish outlet; t
  • FIG. 5 is a bottom plan view of the upper part of my twopart gate
  • FIG. 7 is a top plan view of the lower part of my two-part gate.
  • FIG. 8 is a vertical section on line VIII-VIII of FIG. 7.
  • FIG. 1 shows a vacuum-degassing vessel 10 and a portable tundish 12 for feeding molten metal thereto.
  • Vessel 10 has a refractory lining 13, a connection 14 leading to a source of vacuum (not shown) and inlet and discharge openings 15 and '16 in its top and bottom walls respectively.
  • the discharge opening 16 has a closure 17 shown only diagrammatically.
  • Tundish 12 has a refractory lining 19, an outlet opening 20 in its bottom wall, and an overflow 21 in its upper edge. Molten metal is teemed into the tundish through an opening 22 in the top.
  • the outlet and inlet openings 20 and 15 of the tundish and vessel respectively are aligned as shown.
  • the seal includes a metalcased refractory sleeve 23, which extends through the inlet opening 15 and is vertically movable (FIG. 3).
  • the top wall of vessel 10 carries an annular lower bearing member 24 which encircles sleeve 23.
  • the upper end of the sleeve carries an annular upper bearing member 25.
  • An extensible bellows 26 is connected between the two bearing members 24 and and surrounds sleeve 23.
  • a compression spring 27 surrounds the bellows and bears against the two bearing members and thus urges the sleeve upwardly.
  • the top wall of the degassing vessel 10 carries an upstanding frame 30 on which I mount a double-acting fluid pressure cylinder 31 (FIGS. 2 and 3).
  • the cylinder has the usual connections (not shown) for admitting and discharging motivating fluid, and it contains a reciprocable piston and piston rod 32 movable radially of sleeve 23.
  • the free end of the piston rod carries a ram 33.
  • the top wall of vessel 10 carries a series of upstanding bearings 34 in which I journal respective rollers 35. These rollers support an elongated horizontal tray 36 located between cylinder 31 and sleeve 23 and movable transversely of the piston rod 32.
  • the underside of the tray carries a gear rack 37.
  • l journal a shaft 38 in another series of bearings 39 upstanding from the top of vessel 10.
  • Shaft 38 carries a pinion 40 which meshes with rack 37.
  • One edge of tray 36 has a series of notches 41.
  • l mount a spring-pressed detent 42 on frame 30 in a position to engage any one of the notches 41. I turn shaft 38 to propel tray 36 along rollers 35 to definite positions controlled by engagement of detent 42 with a notch 41.
  • tray 36 carries a plurality of spaced parallel upstanding partitions 43 and 43a which extend transversely of the tray or parallel with the piston rod 32.
  • Partitions 43 are spaced uniformly and define a series of compartments 44 for slidably receiving solid gates 45 and nozzle gates 46.
  • Partition 43a is double and defines a compartment 44a for slidably receiving a two-part gate 47 of my invention, hereinafter described.
  • a chute 48 which I may use for feeding gates to the tray 36. Whenever detent 42 engages a notch 41, the center line of a corresponding compartment 44 or 44a is horizontally aligned with ram 33 and sleeve 23.
  • I may then operate cylinder 31 to project the piston rod 32 and push a gate from this compartment into vertical alignment with sleeve 23, after which I retract the piston rod.
  • the top wall of vessel 10 carries another frame 49 on the opposite side of sleeve 23.
  • the underside ofthe bottom wall of the tundish 12 carries a pair of fixed guide bars 52 on opposite sides of its outlet opening 20 (FIGS. 3 and 4). Pairs of cap screws 53 depend from these guide bars. A pair of vertically movable guide bars 54 are mounted on the cap screws under the respective fixed guide bars. Compression springs 55 encircle the cap screws and urge the movable guide bars upwardly.
  • the confronting faces of the guide bars 52 and 54 are beveled at each end, as indicated at 56, to provide outwardly flared guideways for receiving a gate, as hereinafter explained.
  • the upper face of the bearing member 25 carries a pair of angle iron guides 57 for a gate.
  • FIGS. 4 to 8 show, I form the two-part gate 47 of my invention of separable interfitting rectangular upper and lower metal frames 60 and 61.
  • the upper frame includes outwardly projecting horizontal flanges 62 along its upper edge.
  • the under face of the upper frame has a peripheral groove 63.
  • the top of the lower frame has a peripheral vertical flange 64 which fits within groove 63.
  • the frames 60 and 61 have refractory linings 65 and 66 respectively.
  • I load solid, nozzle and two-part gates 45, 46 and 47 in appropriate compartments 44 and 44a of tray 36.
  • the double partition 43a of compartment 44a affords clearance for the horizontal flange 62 of my two-part gate.
  • the other gates are straight sided and fit freely within compartments 44.
  • a container having an outlet opening in its bottom and being removably positioned over said vessel with said outlet and inlet openings vertically aligned for feeding liquid from said container to said vessel;
  • said lower part being slidable with upper part, but adapted to be retained by the vacuum in said vessel in a position in which it closes said inlet opening when said container is removed from said vessel;
  • said gate includes interfitting rectangular upper and lower frames, said upper frame having flanges along its edges engageable with said retaining means.
  • said mechanism further comprises a slidable solid gate and a slidable nozzle gate adapted to be positioned selectively in vertical alignment with said outlet and inlet openings to prevent or permit flow of liquid therebetween, and said operating means acts also to position said solid gate and said nozzle gate.
  • said operating means includes a tray having compartments for receiving the different gates and being supported on the top of said vessel, pusher means mounted on the top of said vessel for pushing a gate from said tray into vertical alignment with said outlet and inlet openings, and means mounted on the top of said vessel for moving said tray transversely of said pusher means to place any selected gate in alignment with said pusher means.
  • a combination as defined in claim 5 in which a gate pushed into alignment with said outlet and inlet openings in turn pushes the previous gate out of alignment, and including means mounted on the top of said vessel for receiving gates pushed out of alignment.
  • said gate includes refractory-lined interfitting rectangular upper and lower metal frames, said upper frame having flanges along its edges, said retaining means including vertically spaced pairs of guide bars to receive said flanges, and spring means urging said bars together.
  • a container having an inlet opening in its bottom and being removably positioned over said vessel with said outlet and inlet openings vertically aligned for feeding liquid from said container to said vessel;
  • a flow controlling mechanism comprising:
  • sliding gates of types which either close said outlet opening and thereby prevent flow therethrough or provide a passage permitting flow
  • operating means for selectively positioning any of said gates in alignment with said outlet and inlet openings, said operating means comprising:
  • a tray having compartments for receiving the different gates and being supported on the top of said vessel;
  • a combination as defined in claim 9 further comprising a separable two-part gate for closing both said outlet and inlet openings when said container is removed from said vessel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US781929A 1968-12-06 1968-12-06 Mechanism for controlling flow of liquid to a vacuum-treating vessel Expired - Lifetime US3550924A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78192968A 1968-12-06 1968-12-06

Publications (1)

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US3550924A true US3550924A (en) 1970-12-29

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US781929A Expired - Lifetime US3550924A (en) 1968-12-06 1968-12-06 Mechanism for controlling flow of liquid to a vacuum-treating vessel

Country Status (8)

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US (1) US3550924A (de)
AT (1) AT300227B (de)
BE (1) BE742544A (de)
DE (1) DE1959957A1 (de)
ES (1) ES373970A1 (de)
FR (1) FR2025502A1 (de)
GB (1) GB1220020A (de)
NL (1) NL6918321A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601179A (en) * 1970-01-23 1971-08-24 Pennwalt Corp Multichamber directional solidification vacuum casting furnance
US3743007A (en) * 1970-10-21 1973-07-03 Schloemann Ag Continuous casting apparatus with inter-changeable pouring tubes
US3764124A (en) * 1971-04-02 1973-10-09 Usinor Pouring vessel-caisson for treating molten metal in a regulated atmosphere
DE3201633A1 (de) * 1982-01-20 1983-07-28 Technica-Guss GmbH, 8700 Würzburg Anlage zum horizontalen stranggiessen von metallen, insbesondere von stahl
US4971294A (en) * 1989-03-15 1990-11-20 Teledyne Industries, Inc. Induction heated sliding gate valve for vacuum melting furnace
US5879616A (en) * 1996-01-22 1999-03-09 Harbison-Walker Refractories Company Metallurgical vessel and method of using the same
JP3424833B2 (ja) 1995-12-26 2003-07-07 ヴェスヴィウス・フランス・エス・エー 金属容器のためのプレート交換引き抜き装置並びにこの引き抜き装置のためのプレートのセット
WO2011019664A1 (en) * 2009-08-09 2011-02-17 Rolls-Royce Corporation System, method, and apparatus for pouring casting material in an investment cast

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2745210B1 (fr) * 1996-02-28 1998-04-30 Vesuvius France Sa Unite coulissante pour un conteneur metallurgique, et plaque associee
JP7166174B2 (ja) 2016-05-03 2022-11-07 タタ、スティール、ネダーランド、テクノロジー、ベスローテン、フェンノートシャップ 電磁ポンプの温度制御方法
AU2017260148B2 (en) 2016-05-03 2022-08-25 Tata Steel Nederland Technology B.V. Method to operate an apparatus for feeding liquid metal to an evaporator device
WO2017191082A1 (en) 2016-05-03 2017-11-09 Tata Steel Nederland Technology B.V. Apparatus for feeding a liquid material to an evaporator device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601179A (en) * 1970-01-23 1971-08-24 Pennwalt Corp Multichamber directional solidification vacuum casting furnance
US3743007A (en) * 1970-10-21 1973-07-03 Schloemann Ag Continuous casting apparatus with inter-changeable pouring tubes
US3764124A (en) * 1971-04-02 1973-10-09 Usinor Pouring vessel-caisson for treating molten metal in a regulated atmosphere
DE3201633A1 (de) * 1982-01-20 1983-07-28 Technica-Guss GmbH, 8700 Würzburg Anlage zum horizontalen stranggiessen von metallen, insbesondere von stahl
US4971294A (en) * 1989-03-15 1990-11-20 Teledyne Industries, Inc. Induction heated sliding gate valve for vacuum melting furnace
JP3424833B2 (ja) 1995-12-26 2003-07-07 ヴェスヴィウス・フランス・エス・エー 金属容器のためのプレート交換引き抜き装置並びにこの引き抜き装置のためのプレートのセット
US5879616A (en) * 1996-01-22 1999-03-09 Harbison-Walker Refractories Company Metallurgical vessel and method of using the same
WO2011019664A1 (en) * 2009-08-09 2011-02-17 Rolls-Royce Corporation System, method, and apparatus for pouring casting material in an investment cast
US20110057364A1 (en) * 2009-08-09 2011-03-10 Max Eric Schlienger System, method, and apparatus for pouring casting material in an investment cast
US8501085B2 (en) 2009-08-09 2013-08-06 Rolls Royce Corporation System, method, and apparatus for pouring casting material in an investment cast

Also Published As

Publication number Publication date
AT300227B (de) 1972-07-25
FR2025502A1 (de) 1970-09-11
BE742544A (de) 1970-06-02
GB1220020A (en) 1971-01-20
DE1959957A1 (de) 1970-09-17
ES373970A1 (es) 1972-03-16
NL6918321A (de) 1970-06-09

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