US3645520A - Consumable lance - Google Patents

Consumable lance Download PDF

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Publication number
US3645520A
US3645520A US59267A US3645520DA US3645520A US 3645520 A US3645520 A US 3645520A US 59267 A US59267 A US 59267A US 3645520D A US3645520D A US 3645520DA US 3645520 A US3645520 A US 3645520A
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US
United States
Prior art keywords
lance
conduits
controlled
angle
consumable
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 - Lifetime
Application number
US59267A
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English (en)
Inventor
Thomas R Acre
Frederick M Gimbel
Sundaresan Ramachandran
Thomas F Beck
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.)
Allegheny Ludlum Corp
Pittsburgh National Bank
Original Assignee
Allegheny Ludlum Industries Inc
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
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Application granted granted Critical
Publication of US3645520A publication Critical patent/US3645520A/en
Assigned to ALLEGHENY LUDLUM CORPORATION reassignment ALLEGHENY LUDLUM CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). 8-4-86 Assignors: ALLEGHENY LUDLUM STEEL CORPORATION
Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLEGHENY LUDLUM CORPORATION
Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK ASSIGNMENT OF ASSIGNORS INTEREST. RECORDED ON REEL 4855 FRAME 0400 Assignors: PITTSBURGH NATIONAL BANK
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances

Definitions

  • a variety of problems may result from the introduction of a fluid into a volume of liquid, particularly at high pressures.
  • One such problem may be splashing of the liquid. Where the liquid is hot, corrosive, or otherwise hazardous to personnel, splashing of the liquid may be a particularly difficult problem.
  • splashing may be minimized and, furthermore, distribution and dispersion of the fluid into the liquid may be enhanced.
  • this angle must be critically controlled within to 90 of the longitudinal axis of the lance for maximum efficiency and minimum splashing.
  • the angle should be between 25 and 75.
  • a relatively simple device may be constructed to introduce fluid into a volume of liquid at an angle by simply bending the fluid discharge ends of conduits to the required angle.
  • such lances cannot be used effectively in environments in which the lance is consumed since erosion of the lance beyond the angled portion of the conduits will materially reduce the effectiveness of the lance.
  • refractory or other protective coverings which will substantially preclude consumption of the lance as described
  • another approach is to utilize consumable lances. It is obvious, however, that a problem arises in the use of a consumable lance to maintain the angle of fluid ejection in a controlled fashion throughout the length of the lance as it is consumed.
  • the present invention provides a consumable lance for introducing fluid into a volume of liquid at a controlled angle of introduction as the lance is consumed.
  • a consumable lance which comprises an exterior housing, at least one continuous conduit through which fluid may be passed disposed within the housing, with the continuous conduit being at a controlled angle, inclined to the longitudinal axis of the lance, substantially throughout the consumable portion of the conduits length. In this manner, as the lance and conduit are consumed, the angle of fluid emergence therefrom is controlled.
  • the angle of fluid emergence of the conduit supplying same is controlled to 15-90 from the longitudinal axis of the lance throughout the consumable portion of the conduits length.
  • Lances in accordance with the invention, may be effectively used in oxygen steel refining, and in particular, in the vacuum decarburization of alloy steels.
  • FIG. 1 is an elevation view schematically illustrating one embodiment of a consumable fluid injection lance which maintains inclined fluid jets while being consumed, and
  • FIG. 2 is an illustration of a second embodiment of a consumable fluid injection lance with also maintains controlled angle during consumption of the lance
  • FIG. 3 is an illustration of a third embodiment of lance design but one composed of multiple sections.
  • the con sumable lance comprises an exterior housing 10, NA, and 10B and various conduits 12, 12A, and 12B, through which fluid may be passed, disposed within the housing.
  • the conduits are continuous, at least through that portion of the lance which is intended to be consumed.
  • the conduits are connected at the fluids entry end thereof to a source of fluid supply, such as a feeder pipe 8, which may be connected to the source by a pipe connector, as shown.
  • a source of fluid supply such as a feeder pipe 8
  • a pipe connector as shown.
  • the exterior housing may be constructed of any suitable material, depending upon the use to which the lance will be subjected, a common housing material for construction would be a protective refractory in lances to be used for injecting fluids into molten metal.
  • the entire lance may be constructed of refractory material.
  • housing is used herein in its broadest sense and refers to any covering, or the like, for the conduits through which the fluid may be passed.
  • the conduits themselves, terminate in orifice 14, 14A, and 148.
  • the continuous conduits are spiral.
  • the angle of the spiral is controlled so that as the lance is consumed, fluid will be discharged into the liquid at a predetermined, selected angle. It can also be seen that for optimum results a plurality of conduits are used. This assures effective dispersion and distribution of the fluid within the volume of liquid.
  • the conduit configuration shown in FIGS. 2 and 3 may be equally satisfactory.
  • the conduits zigzag throughout at least the consumable portion of its length in the lance. Together, the zigzagging conduits form a crisscrossing pattern. In the illustration shown in FIG. 3, the conduits zigzag into an X-shaped pattern.
  • FIG. 3 also shows an embodiment in which a plurality of sections may be joined to produce a lance of any desired length.
  • a construction may be feasible for mass production of the lance segments with the interchangeability of the segments being an added advantage of this embodiment.
  • the segments together form what is in effect a plurality of continuous conduits throughout the length of at least the consumable portion of the lance.
  • the lance construction may be adapted to particular applications to optimize operation.
  • the number and arrangement of orifices, the size of the orifices and conduits, and the flow rates may be selected in accordance with specific requirements.
  • the lance design in accordance with the invention may be effectively utilized to assure a controlled fluid ejection angle throughout the consumable portion of the lance.
  • a consumable lance for introducing fluid into a liquid at a controlled angle of introduction as the lance is consumed which comprises an exterior housing, at least one continuous conduit through which fluid may be passed disposed within said housing, said continuous conduit being at a controlled acute angle to the longitudinal axis of said lance substantially throughout the consumable portion of the conduits length such that as the lance and conduit are consumed, the angle of fluid emergence therefrom is controlled.
  • a lance according to claim 1 including a plurality of conduits each at said controlled angle throughout the consumable portion of its length.
  • a lance according to claim 1 including a spiral having a controlled spiral angle to provide a controlled fluid emergence angle as it is consumed.
  • a lance according to claim 1 including a zigzagging conduit of controlled angles.
  • a lance according to claim 1 including a plurality of spiral conduits of controlled angles.
  • a lance according to claim 1 including a plurality of zigzagging conduits.
  • a lance according to claim 1 including a plurality of conduits in an X-shaped pattern.
  • a consumable lance for introducing fluid into a volume of molten metal at a controlled angle as the lance is consumed to minimize splashing of said metal which comprises at least one continuous conduit through which fluid may be passed and a protective housing therefor, said continuous conduit ing a fluid from the group consisting of oxygen and oxygencontaining gas into molten iron and iron alloys which includes a plurality of continuous conduits, each at a controlled angle of between to 90 substantially throughout the consumable portion of its length.
  • a consumable lance according to claim 12 wherein said continuous conduits are spiral.
  • a consumable lance according to claim 12 including X'- shaped conduits.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
US59267A 1970-07-29 1970-07-29 Consumable lance Expired - Lifetime US3645520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5926770A 1970-07-29 1970-07-29

Publications (1)

Publication Number Publication Date
US3645520A true US3645520A (en) 1972-02-29

Family

ID=22021886

Family Applications (1)

Application Number Title Priority Date Filing Date
US59267A Expired - Lifetime US3645520A (en) 1970-07-29 1970-07-29 Consumable lance

Country Status (11)

Country Link
US (1) US3645520A (xx)
JP (1) JPS5511879B1 (xx)
AT (1) AT324380B (xx)
AU (1) AU465187B2 (xx)
BE (1) BE770687A (xx)
CA (1) CA953106A (xx)
FR (1) FR2099664B1 (xx)
GB (1) GB1318486A (xx)
NL (1) NL7110431A (xx)
NO (1) NO131137C (xx)
SE (1) SE375325B (xx)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802681A (en) * 1971-04-10 1974-04-09 Messer Griesheim Gmbh Self-cooling lance for oxygen blowing
US4274870A (en) * 1979-04-25 1981-06-23 Newmont Exploration Limited Smelting of copper concentrates by oxygen injection in conventional reverberatory furnaces
US4758269A (en) * 1987-02-24 1988-07-19 Allegheny Ludlum Corporation Method and apparatus for introducing gas into molten metal baths
US4761178A (en) * 1987-08-24 1988-08-02 Bethlehem Steel Corporation Process for heating molten steel contained in a ladle
US4783059A (en) * 1988-01-11 1988-11-08 Insul Company, Inc. Tuyere for treating molten metal
US4783058A (en) * 1988-01-11 1988-11-08 Insul Company, Inc. Lance for treating molten metal
US4792125A (en) * 1987-08-24 1988-12-20 Bethlehem Steel Corporation Consumable lance
US4824080A (en) * 1987-02-24 1989-04-25 Allegheny Ludlum Corporation Apparatus for introducing gas into molten metal baths
US4854553A (en) * 1988-06-03 1989-08-08 Labate M D Self shielding lance
US4898369A (en) * 1989-05-04 1990-02-06 Insul Company, Inc. Lance with metered core for treating molten metal
US5846481A (en) * 1996-02-14 1998-12-08 Tilak; Ravindra V. Molten aluminum refining apparatus
US9145597B2 (en) 2013-02-22 2015-09-29 Almex Usa Inc. Simultaneous multi-mode gas activation degassing device for casting ultraclean high-purity metals and alloys
WO2016046548A1 (en) 2014-09-23 2016-03-31 Swansea University Access port arrangement and method of forming thereof

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120369A (en) * 1982-05-20 1983-11-30 Ksr Int Ltd An improved metallurgical lance
USRE34418E (en) * 1982-11-23 1993-10-26 Injectall Limited Apparatus and method for introducing substances into liquid metal
GB8604219D0 (en) * 1986-02-20 1986-03-26 Injectall Ltd Injection of substances into liquids
SE8702601L (sv) * 1987-06-23 1988-12-24 Hoeganaes Ab Metallurgisk dysa
US4852860A (en) * 1987-08-24 1989-08-01 Bethlehem Steel Corporation Consumable injection lance
GB9023716D0 (en) * 1990-10-31 1990-12-12 Whellock John G Metallurgical apparatus and methods

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506598A (en) * 1948-01-22 1950-05-09 Hydrocarbon Research Inc Apparatus for feeding gas into molten metal baths

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506598A (en) * 1948-01-22 1950-05-09 Hydrocarbon Research Inc Apparatus for feeding gas into molten metal baths

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802681A (en) * 1971-04-10 1974-04-09 Messer Griesheim Gmbh Self-cooling lance for oxygen blowing
US4274870A (en) * 1979-04-25 1981-06-23 Newmont Exploration Limited Smelting of copper concentrates by oxygen injection in conventional reverberatory furnaces
US4824080A (en) * 1987-02-24 1989-04-25 Allegheny Ludlum Corporation Apparatus for introducing gas into molten metal baths
US4758269A (en) * 1987-02-24 1988-07-19 Allegheny Ludlum Corporation Method and apparatus for introducing gas into molten metal baths
US4761178A (en) * 1987-08-24 1988-08-02 Bethlehem Steel Corporation Process for heating molten steel contained in a ladle
US4792125A (en) * 1987-08-24 1988-12-20 Bethlehem Steel Corporation Consumable lance
WO1989001984A1 (en) * 1987-08-24 1989-03-09 Bethlehem Steel Corporation Process for heating molten steel contained in a ladle
WO1989001983A1 (en) * 1987-08-24 1989-03-09 Bethlehem Steel Corporation Consumable lance
US4783058A (en) * 1988-01-11 1988-11-08 Insul Company, Inc. Lance for treating molten metal
US4783059A (en) * 1988-01-11 1988-11-08 Insul Company, Inc. Tuyere for treating molten metal
US4854553A (en) * 1988-06-03 1989-08-08 Labate M D Self shielding lance
US4898369A (en) * 1989-05-04 1990-02-06 Insul Company, Inc. Lance with metered core for treating molten metal
US5846481A (en) * 1996-02-14 1998-12-08 Tilak; Ravindra V. Molten aluminum refining apparatus
US9145597B2 (en) 2013-02-22 2015-09-29 Almex Usa Inc. Simultaneous multi-mode gas activation degassing device for casting ultraclean high-purity metals and alloys
WO2016046548A1 (en) 2014-09-23 2016-03-31 Swansea University Access port arrangement and method of forming thereof

Also Published As

Publication number Publication date
NL7110431A (xx) 1972-02-01
DE2136743B2 (de) 1973-01-18
DE2136743A1 (de) 1972-02-03
NO131137B (xx) 1974-12-30
SE375325B (xx) 1975-04-14
AU3153471A (en) 1973-01-25
GB1318486A (en) 1973-05-31
BE770687A (fr) 1972-01-31
FR2099664B1 (xx) 1974-10-11
AT324380B (de) 1975-08-25
FR2099664A1 (xx) 1972-03-17
NO131137C (xx) 1975-04-09
AU465187B2 (en) 1975-09-18
CA953106A (en) 1974-08-20
JPS5511879B1 (xx) 1980-03-28

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AS Assignment

Owner name: ALLEGHENY LUDLUM CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:ALLEGHENY LUDLUM STEEL CORPORATION;REEL/FRAME:004779/0642

Effective date: 19860805

AS Assignment

Owner name: PITTSBURGH NATIONAL BANK

Free format text: SECURITY INTEREST;ASSIGNOR:ALLEGHENY LUDLUM CORPORATION;REEL/FRAME:004855/0400

Effective date: 19861226

AS Assignment

Owner name: PITTSBURGH NATIONAL BANK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. RECORDED ON REEL 4855 FRAME 0400;ASSIGNOR:PITTSBURGH NATIONAL BANK;REEL/FRAME:005018/0050

Effective date: 19881129