US3730505A - Double delivery lance for refining the steel in the converter processes - Google Patents

Double delivery lance for refining the steel in the converter processes Download PDF

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Publication number
US3730505A
US3730505A US00148520A US3730505DA US3730505A US 3730505 A US3730505 A US 3730505A US 00148520 A US00148520 A US 00148520A US 3730505D A US3730505D A US 3730505DA US 3730505 A US3730505 A US 3730505A
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US
United States
Prior art keywords
lance
conduit
nozzles
main
wall
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Expired - Lifetime
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US00148520A
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English (en)
Inventor
A Ramacciotti
A Praitoni
B Imberti
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Centro Sperimentale Metallurgico SpA
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Centro Sperimentale Metallurgico SpA
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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

  • ABSTRACT Double-delivery refining lance comprising: a main conduit, in a central location with its axis coinciding with the lance axis, diverging into a set of nozzles; a secondary outer annular conduit disposed concentrically about the main conduit diverging in its turn into a set of nozzles, as well as annular conduits, disposed concentrically about the above mentioned main and secondary conduits for cooling fluid input and output respectively.
  • the discharging nozzles of the main conduit diverge conically with respect to the lance axis downwardly by an acute angle and are arranged symmetrically; also the discharging nozzles of the secondary circuit are downwardly inclined with respect to the lance axis by an acute angle not necessarily coinciding with the former and symmetrically arranged; the inclination of the discharging nozzles of the main conduit and respectively of the secondary conduit, and their respective locations, longitudinally and radially with respect to the lance axis, are such as to make the lance particularly useful in converters rotating around a vertical axis.
  • the present invention relates to a double-delivery lance for steel refining in the top-blown converter processes.
  • this invention concerns a lance, which can be used in the steel refining processes in converters, capable of supplying, simultaneously and with separate jets, the oxygen and/or other gases, and as the case may be, other substances necessary for the development of the refining reactions as well as the oxygen and/or other oxidizing gases as necessary to the combustion, inside the converter, of the carbon monoxide produced by said reactions.
  • the purpose of the present invention is that of providing a lance capable of ensuring, as a result of the structural features of its component parts and of their mutual position, both lengthwise and radially with respect to the axis of the lance, a satisfactory mixing of the oxygen, blown through a separate duct from the refining jet, with the carbon monoxide developed by the bath.
  • the lance is particularly useful in converters rotating about a vertical axis embodying a process like that described in the Italian Pat. application No. 50,894A/70.
  • said lance is located along the geometrical axis of the converter, and if this axis is coincident with the axis of rotation of the converter itself, the advantage is obtained that, as the combustion occurs inside of said of said converter and as it is thereby possible to charge it with solid scraps (which in the initial stages of the process could emerge from the liquid bath), under these conditions the possible impacts of the lance against the solid scraps have insignificant effects, the linear rotational speed of the bath relative to the head ofthe lance being practically nil.
  • the lance forming the object of this invention provides: a single feed for the oxygen and/or other gas necessary for refining (primary jet) and for the oxygen and/or other gas necessary for combustion of CO (secondary jet); or: separate feeds when the primary jet consists of gases (as the case may be, also mixed with other refining substances) the quality and/or rates of which are different from those used for the secondary jet.
  • Both the supply conduit for the primary jet and that for the secondary jet end in a group of nozzles among which are called main nozzles those supplying the primary jet, and barrage jets those supplying the secondary jet, respectively, all nozzles being divergent from the axis of the lance, with which they form an acute angle, and located symmetrically with respect to it.
  • Barrage nozzles at with respect to the axis of the lance or divergent therefrom through an obtuse angle are not as satisfactory.
  • the drawbacks associated with this arrangement can be attributed to the fact that the oxygen path, inside the converter, is less than that travelled in the case of barrage nozzles diverging through an acute angle with respect to the axis of the lance.
  • the path travelled by the oxygen inside the converter is short, the pre-heating of the oxygen and the amount of its mixing with the carbon monoxide and therefore the amount of the combustion of the carbon monoxide will also be reduced.
  • the specific object of this invention is a double-delivery lance for steel refining in the converter processes, characterized in that it includes a main central conduit co-axial with the lance itself, which diverges into a set of nozzles divergent from the axis of the lance with which they form an acute angle, and symmetrical with respect to it; a secondary outer annular conduit, co-axial with the main conduit, which diverges into a set of nozzles, called barrage nozzles, diverging through an acute angle with respect to the axis of the lance and symmetrical with respect thereto; and finally annular conduits co-axial with said conduits, for cooling fluid input and output, the inclination of the terminal nozzles of the main conduit and of the secondary conduit respectively, and their mutual positions in longitudinal and radial directions with respect to the axis of the lance being such as to render the latter particularly suitable for use in converters rotating about a vertical axis.
  • the lance having a circular cross sectional shape made of steel with a copper head, includes a conduit 1 for feeding the oxygen of the primary jet which diverges into two main nozzles 2 identical to each other, with a circular cross sectional shape, and divergent with respect to the axis of the lance with which they form an acute angle comprised between l0 and 60, and symmetrical with respect thereto.
  • annular conduit 3 Concentrically with the conduit 1 there is the annular conduit 3 for feeding the secondary jet which diverges into six barrage nozzles 4 identical to one another, having a circular cross sectional shape, divergent with respect to the axis of the lance with which they form an acute angle comprised between 10 and 60 and symmetrical with respect thereto, and from which emerges an oxygen barrier having a substantially conical shape.
  • the plane where the center 5 of the terminal holes of the main nozzles 2 are located is lower than the plane parallel thereto in which are located the centers 6 of the terminal holes of the barrage nozzles 4, said planes being perpendicular to the axis of the lance and spaced apart from one another by a distance comprised between 0 and 30 times the diameter of the lance.
  • Said centers lie on two circumferences, of which the circumference related, as above explained, to the centers of the barrage nozzles, will have a longer radius.
  • annular passages 7 are provided for inlet of the cooling fluid and annular passages 8 are provided for the outlet of said fluid
  • a double-delivery refining lance comprising a central main oxygen conduit having its axis coinciding with the lance axis, an input tubular conduit arranged concentrically around said main conduit for introducing a cooling fluid, an annular secondary oxygen conduit arranged concentrically around said input tubular conduit and an output tubular conduit arranged around said secondary oxygen conduit, said main conduit having at least two main discharging nozzles diverging conically downwardly at an acute angle with respect to the lance axis, said secondary conduit having discharging secondary nozzles diverging downwardly at an acute angle with respect to the lance axis, said main and secondary nozzles being symmetrical to the lance axis and the ratio between the number of said main and secondary nozzles being at least 2 to I, said nozzles extending at the most through only one conduit wall.
  • a double-delivery lance as claimed in claim 4 said output tubular conduit having an outer wall that is the outside wall of the lance.

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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)
US00148520A 1970-07-01 1971-06-01 Double delivery lance for refining the steel in the converter processes Expired - Lifetime US3730505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5183870 1970-07-01

Publications (1)

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US3730505A true US3730505A (en) 1973-05-01

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ID=11275816

Family Applications (1)

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US00148520A Expired - Lifetime US3730505A (en) 1970-07-01 1971-06-01 Double delivery lance for refining the steel in the converter processes

Country Status (12)

Country Link
US (1) US3730505A (de)
JP (1) JPS523322B1 (de)
AT (1) AT334935B (de)
BE (1) BE769142A (de)
CA (1) CA974057A (de)
DE (1) DE2131345A1 (de)
ES (1) ES392685A1 (de)
FR (1) FR2097098B1 (de)
GB (1) GB1349069A (de)
LU (1) LU63398A1 (de)
NL (1) NL7109012A (de)
ZA (1) ZA713585B (de)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230274A (en) * 1978-07-10 1980-10-28 Pullman Berry Company Lance for removing skulls from steelmaking vessels
US4322033A (en) * 1978-07-10 1982-03-30 Pullman Berry Company Lance and method for removing skulls from steelmaking vessels
US4427186A (en) 1981-10-01 1984-01-24 Estel Hoogovens B.V. Liquid-cooled lance for blowing oxygen onto a steel bath
US4533124A (en) * 1982-10-22 1985-08-06 Mecanarbed-Dommeldange S.A.R.L. Device for delivering gaseous and solid materials to a metal pool during a refining process
WO1991005214A1 (en) * 1989-09-29 1991-04-18 Ausmelt Pty. Ltd. Top submerged injection with a shrouded lance
AU640955B2 (en) * 1989-09-29 1993-09-09 Ausmelt Pty Ltd Top submerged injection with a shrouded lance
US5308043A (en) * 1991-09-20 1994-05-03 Ausmelt Pty. Ltd. Top submergable lance
EP0816517A1 (de) * 1996-06-25 1998-01-07 LTV Steel Company, Inc. Unterdrücken der Bildung von Lanzenbären bei der Stahlerzeugung
US5865876A (en) * 1995-06-07 1999-02-02 Ltv Steel Company, Inc. Multipurpose lance
US5988521A (en) * 1995-11-25 1999-11-23 Draim Metallprodukt Gmbh & Co. Kg Spray arm for coating device and method of spraying a coating through the spray arm
US6234406B1 (en) * 1995-06-23 2001-05-22 Jacques J. A. Thomas Blasting nozzle with welded lance head for the agitation of baths
US20090229416A1 (en) * 2004-05-14 2009-09-17 Cameron Andrew M Refining Molten Metal
WO2013080110A1 (en) 2011-11-30 2013-06-06 Outotec Oyj Fluid cooled lances for top submerged injection
WO2014167532A1 (en) 2013-04-12 2014-10-16 Outotec Oyj Apparatus for temperature measurements of a molten bath in a top submerged injection lance installation
WO2015056142A1 (en) 2013-10-16 2015-04-23 Outotec (Finland) Oy Top submerged injection lance for enhanced heat transfer
WO2015056143A1 (en) 2013-10-16 2015-04-23 Outotec (Finland) Oy Top submerged injection lance for enhanced submerged combustion
US9528766B2 (en) 2011-06-30 2016-12-27 Outotec Oyj Top submerged injecting lances
US9771627B2 (en) 2011-09-02 2017-09-26 Outotec Oyj Lances for top submerged injection
WO2022074555A1 (en) * 2020-10-06 2022-04-14 Arcelormittal Lance for blowing oxygen in steelmaking

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU82846A1 (fr) 1980-10-13 1982-05-10 Arbed Lance de soufflage d'oxygene
JPS5816013A (ja) * 1981-07-17 1983-01-29 Kawasaki Steel Corp 上底吹転炉の操業方法および上底吹転炉操業用上吹ランス
NL8201269A (nl) * 1982-03-26 1983-10-17 Hoogovens Groep Bv Werkwijze voor het vervaardigen van staal in een converter uitgaande van ruwijzer en schrot.
DE3231867A1 (de) * 1982-08-27 1984-03-01 Saar-Metallwerke GmbH, 6600 Saarbrücken Zweikreislanze zum frischen von metallschmelzen
NL8400393A (nl) * 1984-02-08 1985-09-02 Hoogovens Groep Bv Vloeistofgekoelde lans voor het blazen van zuurstof op een staalbad.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3309195A (en) * 1965-05-05 1967-03-14 Leland H Hutton Method of delivering oxygen to basic oxygen furnaces, and oxygen lances therefor
CH469943A (de) * 1967-03-21 1969-03-15 Nova Hut Klementa Gottwalda Na Düse zum Verbrennen von flüssigen Brennstoffen oder zum Einblasen von Oxydationsgas in Hüttenöfen
DE1908167A1 (de) * 1968-02-21 1969-09-11 Vitkovice Zelezarny Blasrohr fuer Stahl-Herdoefen,insbesondere Tandemoefen
US3488044A (en) * 1967-05-01 1970-01-06 Nat Steel Corp Apparatus for refining metal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1317735A (de) * 1963-05-08

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3309195A (en) * 1965-05-05 1967-03-14 Leland H Hutton Method of delivering oxygen to basic oxygen furnaces, and oxygen lances therefor
CH469943A (de) * 1967-03-21 1969-03-15 Nova Hut Klementa Gottwalda Na Düse zum Verbrennen von flüssigen Brennstoffen oder zum Einblasen von Oxydationsgas in Hüttenöfen
US3488044A (en) * 1967-05-01 1970-01-06 Nat Steel Corp Apparatus for refining metal
DE1908167A1 (de) * 1968-02-21 1969-09-11 Vitkovice Zelezarny Blasrohr fuer Stahl-Herdoefen,insbesondere Tandemoefen

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230274A (en) * 1978-07-10 1980-10-28 Pullman Berry Company Lance for removing skulls from steelmaking vessels
US4322033A (en) * 1978-07-10 1982-03-30 Pullman Berry Company Lance and method for removing skulls from steelmaking vessels
US4427186A (en) 1981-10-01 1984-01-24 Estel Hoogovens B.V. Liquid-cooled lance for blowing oxygen onto a steel bath
US4533124A (en) * 1982-10-22 1985-08-06 Mecanarbed-Dommeldange S.A.R.L. Device for delivering gaseous and solid materials to a metal pool during a refining process
WO1991005214A1 (en) * 1989-09-29 1991-04-18 Ausmelt Pty. Ltd. Top submerged injection with a shrouded lance
AU640955B2 (en) * 1989-09-29 1993-09-09 Ausmelt Pty Ltd Top submerged injection with a shrouded lance
US5251879A (en) * 1989-09-29 1993-10-12 Floyd John M Top submerged injection with a shrouded lance
US5308043A (en) * 1991-09-20 1994-05-03 Ausmelt Pty. Ltd. Top submergable lance
US5865876A (en) * 1995-06-07 1999-02-02 Ltv Steel Company, Inc. Multipurpose lance
US6234406B1 (en) * 1995-06-23 2001-05-22 Jacques J. A. Thomas Blasting nozzle with welded lance head for the agitation of baths
US5988521A (en) * 1995-11-25 1999-11-23 Draim Metallprodukt Gmbh & Co. Kg Spray arm for coating device and method of spraying a coating through the spray arm
EP0816517A1 (de) * 1996-06-25 1998-01-07 LTV Steel Company, Inc. Unterdrücken der Bildung von Lanzenbären bei der Stahlerzeugung
US20090229416A1 (en) * 2004-05-14 2009-09-17 Cameron Andrew M Refining Molten Metal
US9528766B2 (en) 2011-06-30 2016-12-27 Outotec Oyj Top submerged injecting lances
US9771627B2 (en) 2011-09-02 2017-09-26 Outotec Oyj Lances for top submerged injection
WO2013080110A1 (en) 2011-11-30 2013-06-06 Outotec Oyj Fluid cooled lances for top submerged injection
US9829250B2 (en) 2011-11-30 2017-11-28 Outotec Oyj Fluid cooled lances for top submerged injection
WO2014167532A1 (en) 2013-04-12 2014-10-16 Outotec Oyj Apparatus for temperature measurements of a molten bath in a top submerged injection lance installation
WO2015056142A1 (en) 2013-10-16 2015-04-23 Outotec (Finland) Oy Top submerged injection lance for enhanced heat transfer
WO2015056143A1 (en) 2013-10-16 2015-04-23 Outotec (Finland) Oy Top submerged injection lance for enhanced submerged combustion
US10077940B2 (en) 2013-10-16 2018-09-18 Outotec (Finland) Oy Top submerged injection lance for enhanced submerged combustion
WO2022074555A1 (en) * 2020-10-06 2022-04-14 Arcelormittal Lance for blowing oxygen in steelmaking
WO2022074428A1 (en) * 2020-10-06 2022-04-14 Arcelormittal Lance for blowing oxygen in steelmaking

Also Published As

Publication number Publication date
DE2131345A1 (de) 1972-01-13
LU63398A1 (de) 1971-09-22
NL7109012A (de) 1972-01-04
FR2097098B1 (de) 1974-05-31
CA974057A (en) 1975-09-09
ZA713585B (en) 1972-01-26
FR2097098A1 (de) 1972-03-03
BE769142A (fr) 1971-11-03
GB1349069A (en) 1974-03-27
AT334935B (de) 1977-02-10
JPS523322B1 (de) 1977-01-27
ATA570971A (de) 1976-06-15
ES392685A1 (es) 1973-08-01

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