US3322419A - Oxygen jet devices - Google Patents

Oxygen jet devices Download PDF

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Publication number
US3322419A
US3322419A US420869A US42086964A US3322419A US 3322419 A US3322419 A US 3322419A US 420869 A US420869 A US 420869A US 42086964 A US42086964 A US 42086964A US 3322419 A US3322419 A US 3322419A
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US
United States
Prior art keywords
tip
water
oxygen
cooling water
posts
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
US420869A
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English (en)
Inventor
George H Smith
Leslie C Kun
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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
Publication date
Application filed by Union Carbide Corp filed Critical Union Carbide Corp
Priority to US420869A priority Critical patent/US3322419A/en
Priority claimed from US421052A external-priority patent/US3337204A/en
Priority claimed from US420911A external-priority patent/US3337203A/en
Priority to NL6516441A priority patent/NL6516441A/xx
Priority to GB54005/65A priority patent/GB1131070A/en
Priority to BE674209D priority patent/BE674209A/fr
Priority to FR43327A priority patent/FR1461157A/fr
Application granted granted Critical
Publication of US3322419A publication Critical patent/US3322419A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • This invention relates to metallurgical lances, and more particularly to oxygen jet devices for use in steelmaking furnaces.
  • the invention provides fluid jet devices having hollow tips which comprise at least one integral cusp that projects into the space through which cooling liquid flows, for greatly increasing the useful life of the tip by effectively increasing the transfer of heat to such liquid.
  • the invention provides a metallurgical lance comprising, in combination, a hollow tip composed of metal having a lower end wall merging into an integral annular side wall, and a plurality of separate posts having in each an outwardly and downwardly inclined oxygen gas discharge passage, and means for increasing the heat transfer to cooling water through the tip, including a plurality of integral cusps on the inner surface of the end wall and on the back of such posts providing curved water passages therebetween, causing such water to flow with a scrubbing and scouring action as the direction thereof is changed in flowing over the surfaces of such cusps.
  • the main object of the invention is to increase the useful life of such devices without increasing the cost thereof.
  • Another object is to provide an oxygen jet device having a tip that has a useful life that is substantially longer than that of those of the prior art.
  • a still further object is to provide a fluid cooled oxygen lance tip that is simple and economical in construction, requires little machining and can be readily and quickly assembled.
  • Such objects are accomplished by the provision of at least one integral cusp on the inner side of the end wall of the water-cooled tip of the device.
  • Such cusp may be in the form of a pyramid located in the center of the tip, and/or substantially transverse vanes, wings or foils located in an annulus around and radially spaced from such center.
  • Each cusp functions not only to increase the effective heat transfer surface area over which the cooling water flows, but more importantly also acts to change the direction of flow of the water, thereby effectively causing a scrubbing and scouring action on the adjacent metal surfaces thereby ever bringing relatively colder water into intimate contact with such surfaces, and thus improving the over-all heat transfer.
  • a metallurgical lance comprising, in combination, a hollow tip composed of metal having an end wall merging into an integral annular side wall, and a plurality of posts having in each oxygen gas discharge passage, and means for directing cooling liquid through the tip, including an integral cusp on the downstream side of each post, providing water passages, causing such water to flow with a scrubbing and scouring action as the direction thereof is changed in flowing over the adjacent surfaces of such cusps.
  • FIG. 1 is a fragmentary view mainly in vertical section taken on line 11 of FIG. 2 of an oxygen jet device embodying the invention
  • FIG. 2 is a horizontal cross section of such device taken on line 22 of FIG. 1;
  • FIG. 3- is an exploded perspective view of the tip
  • FIG. 4 is a perspective view of the external parts of a partially assembled tip
  • FIG. 5 is a similar view of the internal parts.
  • FIG. 6 is a perspective view of the entire tip.
  • oxygen jet device 10 includes three elongated steel pipes 12, 14 and 16 that are arranged in spaced concentric relation to provide a central supply passage 18 for oxygen, and tubular cooling water inlet and outlet passages 20 and 22.
  • the pipes are about sixty feet long and are connected at their upper ends to a unit casting (not shown) provided with suitable plumbing connections for the oxygen supply, the cooling water supply and discharge.
  • oxygen supplied to the device in the illustration is about 10-25 thousand cubic feet per minute while about 5-8 hundred gallons per minute of cooling water flows through the device.
  • the device 10 is about ten inches in outside diameter.
  • the device is provided with a tip 24 that comprises a monolithic casting composed of highly heat conductive metal, such as copper, and alloys thereof, having three inclined pillars or posts 26.
  • Such posts are hollow and arranged in downwardly and outwardly inclined relation between an inner transverse wall or plate 28 and an end or front wall 30.
  • the latter merges into an annular outer side wall 32 the upper rim of which is annularly welded at 33 to the lower rim of a copper collar 32 that is, in turn, welded to a steel collar 16 at 33, the latter being welded to the pipe 16 at 33".
  • the upper rim of the transverse wall 28 is similarly welded at 35 to the lower rim of a copper collar 12 that is, in turn, welded to a steel collar 12" at 35', the latter being welded to pipe 12 at 35", FIG. 1.
  • Three horizontal plate-segments 36 are mounted on the top of curved flanges or vanes 38 that are integral with the internal surface of end wall 30. Such segments 36 are welded at 40 to the lower rim of a steel collar 14 that is, in turn, welded at 40 to the intermediate pipe 14 in spaced relation to the transverse wall 28.
  • the plate-segments 36 act as cooling water baflies, causing the cooling water to flow first inwardly around the upper portions of posts 26 and then downwardly in the central space therebetween.
  • a cusp comprising triangular pyramid 42 extends up wardly from the inner surface or floor of the end wall 30 for then directing such downwardly flowing cooling water outwardly toward the lower portions of the posts 26, and into the arcuate ways 44 between the curved vanes 38.
  • Such arcuate ways 44 positively direct the water outwardly, continuously and completely around the entire outer surface of the lower portion of each post.
  • Such water finally flows upwardly through tubular passage 22.
  • Inwardly projecting protrusions 46 on the inner surface of the annular wall 32 are located and shaped so that each cooperates with a cusp 48 extending laterally and downstream from each post 26.
  • Each cusp 48 is in the form of a curved nose or protuberance, as shown.
  • the pyramid 42, flanges 38, protrusions 46 and noses 48 have important functions that include the following:
  • the useful life of the tip in steelmaking furnaces is substantially increased compared to prior devices, since the tip is much more effectively water cooled, especially adjacent critical zones, such as those where the annular inner surface 50 of each oxygen port 52 meets the outer surface 54 of the end wall 30.
  • the jet device or lance is lowered in the furnace to a level just above the molten steel being made in such furnace and oxygen is discharged downwardly from the ports 52 toward the surface of such molten steel, raising the temperature of the latter by reacting with combustible components of the bath.
  • the cooling water passages in the lower portion of the tip are proportioned and shaped so that water flows through all of them in constantly full, continuous streams, without interruption, and without the formation of any vapor pockets adjacent the smooth surfaces of the metal, which surfaces are streamlined, so that maximum heat is conducted to the water flowing through such passages or ways with a minimum of water pressure loss due to friction.
  • the sum of the benefits provided by the cusps in the tip increase the effectiveness of the cooling water to such an extent that the useful life of the tip is greatly extended, and this advantage is achieved without increasing the cost of the tip.
  • the illustrated example of the invention comprises a casting
  • the invention is not limited thereto, since the tip may be made of forgings which, in some cases, are better, especially in the case of the tip per se, due to the production of a more uniform product in manufacture.
  • the example is provided with three posts, any desired or required number of posts may be provided without departing from the invention.
  • a metallurgical lance comprising a tip composed of a metal having an end wall that merges into an annular side wall, and a transverse wall spaced inwardly and upwardly with respect to said end wall and with the inner annular surface of said annular side wall, a plurality of inclined hollow posts connected at one end to said transverse wall and at the other end to said end wall, said posts having oxygen gas outlet passages the longitudinal axes of which are inclined downwardly and outwardly, an inner oxygen supply pipe connected to the upper rim of said transverse wall, an outer pipe connected to the upper rim of the annular side wall of said tip, and an intermediate pipe connected to the tip below and between said other pipes, the annular space between the inner and intermediate pipes providing a tubular cooling water inlet passage, and the annular space between the intermediate and outer pipes providing a tubular water outlet passage, and means for positively directing cooling water circumferentially around the lower portions of said posts, including a plurality of integral cusps on the inner surface of said end wall in the form of a central

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
US420869A 1964-12-24 1964-12-24 Oxygen jet devices Expired - Lifetime US3322419A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US420869A US3322419A (en) 1964-12-24 1964-12-24 Oxygen jet devices
NL6516441A NL6516441A (fr) 1964-12-24 1965-12-16
GB54005/65A GB1131070A (en) 1964-12-24 1965-12-21 Metallurgical lance
BE674209D BE674209A (fr) 1964-12-24 1965-12-22
FR43327A FR1461157A (fr) 1964-12-24 1965-12-22 Lance métallurgique

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US421052A US3337204A (en) 1964-12-24 1964-12-24 Roof jets
US420869A US3322419A (en) 1964-12-24 1964-12-24 Oxygen jet devices
US420911A US3337203A (en) 1964-12-24 1964-12-24 Oxygen lances

Publications (1)

Publication Number Publication Date
US3322419A true US3322419A (en) 1967-05-30

Family

ID=27411290

Family Applications (1)

Application Number Title Priority Date Filing Date
US420869A Expired - Lifetime US3322419A (en) 1964-12-24 1964-12-24 Oxygen jet devices

Country Status (5)

Country Link
US (1) US3322419A (fr)
BE (1) BE674209A (fr)
FR (1) FR1461157A (fr)
GB (1) GB1131070A (fr)
NL (1) NL6516441A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525508A (en) * 1967-03-20 1970-08-25 Berry Metal Co Injection lance with an immersible nozzle
US3559974A (en) * 1969-03-03 1971-02-02 Berry Metal Co Oxygen lances having a high resistance to deterioration and multipiece nozzle heads therefor
US3752402A (en) * 1971-04-19 1973-08-14 H Marioneaux Fluid injection lance and nozzle means therefor
US3892393A (en) * 1973-02-07 1975-07-01 John T Carroll Lance tip
US4417721A (en) * 1982-06-04 1983-11-29 Pehlke Robert D Lance tip for oxygen steelmaking
WO1996015278A1 (fr) * 1994-11-15 1996-05-23 A.H. Tallman Bronze Company Limited Buse refroidie par liquide pour lance de convertisseur a soufflage d'oxygene
US6234406B1 (en) * 1995-06-23 2001-05-22 Jacques J. A. Thomas Blasting nozzle with welded lance head for the agitation of baths
EP1211327A2 (fr) * 2000-12-04 2002-06-05 ThyssenKrupp Stahl AG Lance de soufflage
US20070246869A1 (en) * 2006-04-21 2007-10-25 Berry Metal Company Metal making lance tip assembly
US20120100496A1 (en) * 2007-08-06 2012-04-26 Anne Boer Burner
US9032623B2 (en) 2007-08-06 2015-05-19 Shell Oil Company Method of manufacturing a burner front face

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2327259B (en) * 1997-07-15 2001-06-20 British Steel Plc Steel making lances

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863656A (en) * 1955-09-20 1958-12-09 American Brake Shoe Co Injectors for furnaces
US3201104A (en) * 1962-08-21 1965-08-17 Walter V Berry Oxygen lance for subsurface use

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863656A (en) * 1955-09-20 1958-12-09 American Brake Shoe Co Injectors for furnaces
US3201104A (en) * 1962-08-21 1965-08-17 Walter V Berry Oxygen lance for subsurface use

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525508A (en) * 1967-03-20 1970-08-25 Berry Metal Co Injection lance with an immersible nozzle
US3559974A (en) * 1969-03-03 1971-02-02 Berry Metal Co Oxygen lances having a high resistance to deterioration and multipiece nozzle heads therefor
US3752402A (en) * 1971-04-19 1973-08-14 H Marioneaux Fluid injection lance and nozzle means therefor
US3892393A (en) * 1973-02-07 1975-07-01 John T Carroll Lance tip
US4417721A (en) * 1982-06-04 1983-11-29 Pehlke Robert D Lance tip for oxygen steelmaking
WO1996015278A1 (fr) * 1994-11-15 1996-05-23 A.H. Tallman Bronze Company Limited Buse refroidie par liquide pour lance de convertisseur a soufflage d'oxygene
US6234406B1 (en) * 1995-06-23 2001-05-22 Jacques J. A. Thomas Blasting nozzle with welded lance head for the agitation of baths
EP1211327A2 (fr) * 2000-12-04 2002-06-05 ThyssenKrupp Stahl AG Lance de soufflage
US20070246869A1 (en) * 2006-04-21 2007-10-25 Berry Metal Company Metal making lance tip assembly
WO2007123986A3 (fr) * 2006-04-21 2007-12-21 Berry Metal Co Ensemble de pointe de lance de fabrication de metal
US20120100496A1 (en) * 2007-08-06 2012-04-26 Anne Boer Burner
US9032623B2 (en) 2007-08-06 2015-05-19 Shell Oil Company Method of manufacturing a burner front face

Also Published As

Publication number Publication date
GB1131070A (en) 1968-10-23
BE674209A (fr) 1966-04-15
NL6516441A (fr) 1966-06-27
FR1461157A (fr) 1966-12-02

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