US3743139A - Method and apparatus for initiating pouring from a blocked opening of a bottom pour vessel - Google Patents

Method and apparatus for initiating pouring from a blocked opening of a bottom pour vessel Download PDF

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Publication number
US3743139A
US3743139A US00169954A US3743139DA US3743139A US 3743139 A US3743139 A US 3743139A US 00169954 A US00169954 A US 00169954A US 3743139D A US3743139D A US 3743139DA US 3743139 A US3743139 A US 3743139A
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US
United States
Prior art keywords
gate
opening
gas
metal
nozzle
Prior art date
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Expired - Lifetime
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US00169954A
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English (en)
Inventor
R Lyman
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United States Steel Corp
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United States Steel Corp
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Publication of US3743139A publication Critical patent/US3743139A/en
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)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D41/44—Consumable closure means, i.e. closure means being used only once
    • B22D41/46—Refractory plugging masses
    • B22D41/465—Unplugging a vessel discharge port
    • 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

  • My invention provides means for reliably and controllably initiating a stream of molten metal from a bottom-pour vessel after the vessel has been filled, or after pouring from it has been temporarily discontinued.
  • Reactive and inert gases are frequently introduced to molten metal to provide various treatments, such as degassing, stirring, decarburizing 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 bottom-pour vessels, as shown in Shapland U.S. Pat. No. 3,352,465.
  • Andrzejak, Orehoski, and Shapland in application Ser. No. 2,224 filed Jan. 12, 1970 and commonly assigned, have disclosed a permeable refractory gate block through which gas is injected into the well of a bottom-pour vessel to agitate the molten metal and suppress the formation of a solid metal shell.
  • an inert gas such as argon
  • pouring streams do not always begin to flow when the gate is opened.
  • a reactive gas such as oxygen is injected an objectionable degree of metal contamination may result.
  • a metal-oxygen-refractory reaction may erode the working surface of the low density permeable refractory allowing a steel fin to form between the stationary and moving gate refractories when the gate is opened.
  • 1t is also an object to provide means for initiating stream flow with no damage to the surrounding equipment.
  • the single FlGURE is a cross-section through the nozzle of a bottom-pour vessel equipped with a sliding nozzle-lancing gate constructed in accordance with my invention.
  • the drawing shows a portion of a bottom-pour vessel 10 with a refractory lining 12 for receiving molten metal.
  • the bottom wall of the vessel has a well or recess 13 and an outlet opening 14 lined with erosion-resistant refractory 15.
  • the bottom wall carries a nozzle plate 16 fixed to its underside which has a refractory nozzle 17 aligned with the opening.
  • a sliding gate closure member or noule-lancing gate 18 is mounted beneath the nozzle.
  • Gate 18 has a nozzle opening therein, but can be replaced by a blank gate, not shown.
  • the gate can be supported and operated in any desired manner; hence, I have not shown the supporting and operating mechanism.
  • the gate includes a solid refractory portion 19 having a centrally located refractory nozzle 20 and is covered on its sides and bottom by a steel jacket 21.
  • a heavy-walled pipe 22 extends through jacket 21 and nozzle 20 where it is afiixed in a slag-resistant basic refractory 23.
  • Nozzle 20 carries in its bore a cup or disc 25 which has a small orifice 26, preferably off center of the disc.
  • the inside diameter of pipe 22 should be larger than the diameter of orifice 26.
  • the disc is made of a lightweight material, such as aluminum or plastic, having a melting point of or below that of molten steel. in some cases, a suitable thickness steel disc may be employed.
  • Oxygen or other reactive gas is supplied to pipe 22 through an oxygen supply line 28 which carries a cupshaped end fitting 29.
  • a blank gate is placed into the position of gate 18.
  • the molten metal that settles into outlet 14 develops a solidified skin 30 as it loses heat to its surroundings.
  • gate 18 is moved into position beneath nozzle 17. 1fv the ferrostatic head in the vessel is not sufficient to break the solidified metal skin, the oxygen supply line 28 is moved into position so that fitting 29 encloses the exterior opening of pipe 22 and the flow of oxygen through supply line 28 is begun.
  • the oxygen moves through pipe 22 and circulates turbulently within the pressure chamber defined by the bore of nozzle 20 and disc 25, discharging through orifice 26 in disc 25 as well as through any leaks that might exist between the bottom of nozzle plate 16 and the top of sliding gate 18.
  • the gas pressure in the chamber is instantaneously discharged and flow of gas through pipe 22 is immediately shut oiT, which may be accomplished by merely removing end fitting 29 from the end of heavy-wall pipe 22.
  • Molten metal will enter pipe 22 and the effect of the heavy wall will be to chill the molten metal and cause it to freeze therein, effectively sealing the pipe against leakage.
  • a refractory body having an opening therethrough
  • a disc made of a material having a melting point below that of the molten metal in the vessel, said disc being seated in said opening for restricting the flow of a gas through said opening, said disc and said body defining a chamber;
  • a method of initiating pouring from a nozzle-pour vessel containing molten metal, the pouring opening of which vessel has become blocked by solidification of a skin of metal in the region of the opening comprising:
  • a sliding gate refractory closure member beneath said pouring opening, said gate having an opening being at least partially blocked by a perforable device for restricting gas-flow therethrough, said gate including means for introducing gas to the chamber defined by said gate opening, said device and said skin of metal;
  • a method of initiating pouring from a nozzle-pour vessel containing molten metal, the nozzle-pour opening of which vessel has become blocked by solidification of a skin of metal in the region of the opening comprising:
  • a sliding gate refractory closure member beneath said nozzle-pour opening, said gate having a gate opening which is aligned with said first named opening and is at least partially blocked by a device for restricting gas-flow therethrough, said skin and said device defining a chamber within said gate opening, said gate including means for introducing gas to said chamber;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Continuous Casting (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US00169954A 1971-08-09 1971-08-09 Method and apparatus for initiating pouring from a blocked opening of a bottom pour vessel Expired - Lifetime US3743139A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16995471A 1971-08-09 1971-08-09

Publications (1)

Publication Number Publication Date
US3743139A true US3743139A (en) 1973-07-03

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ID=22617896

Family Applications (1)

Application Number Title Priority Date Filing Date
US00169954A Expired - Lifetime US3743139A (en) 1971-08-09 1971-08-09 Method and apparatus for initiating pouring from a blocked opening of a bottom pour vessel

Country Status (20)

Country Link
US (1) US3743139A (ro)
JP (1) JPS5114451B2 (ro)
AR (1) AR192966A1 (ro)
AT (1) AT325793B (ro)
AU (1) AU465563B2 (ro)
BE (1) BE787151A (ro)
BR (1) BR7205300D0 (ro)
CA (1) CA968524A (ro)
DE (1) DE2238913A1 (ro)
DK (1) DK129321B (ro)
ES (1) ES405391A1 (ro)
FR (1) FR2148504B1 (ro)
GB (1) GB1407502A (ro)
IE (1) IE36603B1 (ro)
IT (1) IT964902B (ro)
NL (1) NL7210896A (ro)
NO (1) NO134037C (ro)
PL (1) PL75973B1 (ro)
RO (1) RO59796A (ro)
ZA (1) ZA725120B (ro)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931913A (en) * 1973-11-16 1976-01-13 Stopinc Aktiengesellschaft Slide gate nozzle
US3982582A (en) * 1973-12-08 1976-09-28 Concast Ag Method and apparatus for casting metals into a continuous casting mold
US4003561A (en) * 1973-11-23 1977-01-18 United States Steel Corporation Pouring of metals
US4202533A (en) * 1978-08-24 1980-05-13 Daussan Et Compagnie Method and a device for unchoking the casting outlet of a metallurgical vessel
US4450986A (en) * 1982-07-09 1984-05-29 Harasym Michael F Apparatus for unplugging a vessel discharge port
US4720083A (en) * 1983-07-15 1988-01-19 Ceskoslovenska Akademie Ved Valve closure gate assembly for foundry ladles
EP0267575A2 (en) * 1986-11-14 1988-05-18 Vesuvius Crucible Company Improved apparatus for unplugging a vessel discharge port
US4877161A (en) * 1986-11-14 1989-10-31 Vesuvius Crucible Company Telescoping device for unplugging a vessel discharge port

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5061675U (ro) * 1973-09-29 1975-06-06
JPS5410789Y2 (ro) * 1974-05-30 1979-05-17
JPS5939864B2 (ja) * 1977-11-07 1984-09-26 スタンレー電気株式会社 小形電球の製造方法
JPH0644950A (ja) * 1991-09-17 1994-02-18 Corona Sangyo Kk 装飾用電灯の製造方法
DE4326325C2 (de) * 1993-08-05 1996-07-11 Inductotherm Coating Equipment Metallurgisches Gefäß
CN114643355B (zh) * 2022-03-23 2024-01-23 重庆钢铁股份有限公司 一种钢包水口用稀土丝进行搭火烧氧的引流工艺技术

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US673556A (en) * 1899-09-15 1901-05-07 John M Hartman Iron notch for blast-furnaces and means for plugging same.
US1833739A (en) * 1929-11-04 1931-11-24 Gen Electric Furnace tapping device
US3484026A (en) * 1966-08-23 1969-12-16 Interstop Ag Apparatus for casting metal from a container with a sliding nozzle
US3581948A (en) * 1969-08-11 1971-06-01 Interstop Ag Sliding gate of a casting ladle for pouring liquid metals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US673556A (en) * 1899-09-15 1901-05-07 John M Hartman Iron notch for blast-furnaces and means for plugging same.
US1833739A (en) * 1929-11-04 1931-11-24 Gen Electric Furnace tapping device
US3484026A (en) * 1966-08-23 1969-12-16 Interstop Ag Apparatus for casting metal from a container with a sliding nozzle
US3581948A (en) * 1969-08-11 1971-06-01 Interstop Ag Sliding gate of a casting ladle for pouring liquid metals

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931913A (en) * 1973-11-16 1976-01-13 Stopinc Aktiengesellschaft Slide gate nozzle
US4003561A (en) * 1973-11-23 1977-01-18 United States Steel Corporation Pouring of metals
US3982582A (en) * 1973-12-08 1976-09-28 Concast Ag Method and apparatus for casting metals into a continuous casting mold
US4202533A (en) * 1978-08-24 1980-05-13 Daussan Et Compagnie Method and a device for unchoking the casting outlet of a metallurgical vessel
US4450986A (en) * 1982-07-09 1984-05-29 Harasym Michael F Apparatus for unplugging a vessel discharge port
US4720083A (en) * 1983-07-15 1988-01-19 Ceskoslovenska Akademie Ved Valve closure gate assembly for foundry ladles
EP0267575A2 (en) * 1986-11-14 1988-05-18 Vesuvius Crucible Company Improved apparatus for unplugging a vessel discharge port
EP0267575A3 (en) * 1986-11-14 1988-08-17 Vesuvius Crucible Company Improved apparatus for unplugging a vessel discharge port
US4877161A (en) * 1986-11-14 1989-10-31 Vesuvius Crucible Company Telescoping device for unplugging a vessel discharge port

Also Published As

Publication number Publication date
GB1407502A (en) 1975-09-24
NO134037C (ro) 1976-08-11
BR7205300D0 (pt) 1973-06-14
FR2148504A1 (ro) 1973-03-23
AU4505072A (en) 1974-01-31
PL75973B1 (ro) 1975-02-28
ZA725120B (en) 1973-04-25
ES405391A1 (es) 1975-09-01
RO59796A (ro) 1976-05-15
AT325793B (de) 1975-11-10
ATA682672A (de) 1975-01-15
IE36603B1 (en) 1976-12-08
AU465563B2 (en) 1975-10-02
IE36603L (en) 1973-02-09
NL7210896A (ro) 1973-02-13
FR2148504B1 (ro) 1976-08-13
AR192966A1 (es) 1973-03-21
DE2238913A1 (de) 1973-02-15
JPS4826626A (ro) 1973-04-07
DK129321B (da) 1974-09-30
JPS5114451B2 (ro) 1976-05-10
CA968524A (en) 1975-06-03
NO134037B (ro) 1976-05-03
IT964902B (it) 1974-01-31
DK129321C (ro) 1975-02-17
BE787151A (fr) 1973-02-05

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Legal Events

Date Code Title Description
AS Assignment

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