US3281136A - Method and apparatus for the gas injection into a metal bath - Google Patents

Method and apparatus for the gas injection into a metal bath Download PDF

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Publication number
US3281136A
US3281136A US134071A US13407161A US3281136A US 3281136 A US3281136 A US 3281136A US 134071 A US134071 A US 134071A US 13407161 A US13407161 A US 13407161A US 3281136 A US3281136 A US 3281136A
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United States
Prior art keywords
gas
metal bath
tuyere
jet
divergent
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Expired - Lifetime
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US134071A
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English (en)
Inventor
Metz Paul
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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Filing date
Publication date
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Publication of US3281136A publication Critical patent/US3281136A/en
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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

Definitions

  • the injection lance comprises two concentric conduits, the inner conduit feeding the principal jet constituted for example by oxygen carrying in suspension pulverized lime while the outer conduit feeds the secondary jets of gas which may be different from the gas constituting the principal jet.
  • This arrangement permits establishing or interrupting at will the secondary jets during the flow of the principal jet.
  • refining in the Martin furnace where it is suitable to reduce in a permanent manner the penetration of the principal jet in the metal bath.
  • the insufiiation in the bath of very penetrating gaseous jets causes strong projections which reach the arch where they attack violently.
  • the single conduit admitting gas or the insufilated mixture is provided at its open end with a convergent-divergent outlet tube or tuyere in the form of a spool or drum, engaged in the said conduit and which provides, between its own outer surface and the internal surface of the conduit, an annular chamber which is placed in communication by a group of cylindrical orifices or preferably divergent conical orifices with the outlet of the divergent part of the tuyere, on the one hand, and by another group of cylindrical or preferably convergent or convergent-divergent channels with the outlet tube of the divergent part of the tuyere on the other 3,281,136 Patented Oct. 25, 1966 hand.
  • the annular chamber is fed with gas taken from the central jet in the convergent zone of the outlet tube and there is established in the said chamber a pressure greater than the pressure prevailing below in the divergent part. Because of this fact, the gas contained in the annular chamber flows through channels debouching in the divergent part of the outlet tube forming secondary jets with high speed which disturb the principal jet and consequently reduce the faculty of penetration in the metal bath of the resultant jet.
  • the axes of the secondary jets can meet at one and the same point of the geometric axis of the outlet tube or, on the contrary, can be oriented tangentially to an axial geometric nucleus in such a way as to impart a principal gyratory motion.
  • the orifices and the channels of the outlet tube in such a way that the entire flow of the secondary jets will be not less than 20% of the total.
  • gas insufllated by the lance may or may not be admixed with pulverulent materials, as for example, lime.
  • the accompanying drawing shows as a vertical section an injection lance cooled by water circulation in accordance with the invention.
  • 1 designates the single conduit admitting the gas to be insufllated and Which contingently may carry pulverulent materials in suspension.
  • 2 designates the outlet tube or tuyere comprising a convergent part 3 at one end and a divergent part 4 at the other end.
  • 5 designates the chamber or space between the inner surface of the conduit 1
  • 6 designates the orifice-s pierced near the entrance section of the convergent part 3 of the outlet tube 1.
  • 7 designates channels pierced in the wall of the outlet tube near the outgoing section of the divergent part 4.
  • a device for injecting an oxidizing gas into a metal bath comprising a conduit feeding gas at its open end provided with a convergent-divergent tuyere engaged in the said conduit and which provides between its own external surface and the internal surface of the tuyere an annular chamber which is in communication by a group of orifices of conical and divergent configuration with the upper part of the convergent of the tuyere and convergent-divergent channel-s in the tuyere with the lower part of the divergence of the tuyere, said channels being oriented obliquely and convergently with respect to the axis of the tuyere.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nozzles (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
US134071A 1960-09-12 1961-08-25 Method and apparatus for the gas injection into a metal bath Expired - Lifetime US3281136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU39169 1960-09-12

Publications (1)

Publication Number Publication Date
US3281136A true US3281136A (en) 1966-10-25

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ID=19722411

Family Applications (1)

Application Number Title Priority Date Filing Date
US134071A Expired - Lifetime US3281136A (en) 1960-09-12 1961-08-25 Method and apparatus for the gas injection into a metal bath

Country Status (3)

Country Link
US (1) US3281136A (enrdf_load_stackoverflow)
DE (1) DE1408783A1 (enrdf_load_stackoverflow)
LU (1) LU39169A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534948A (en) * 1966-08-24 1970-10-20 Exxon Research Engineering Co Lance heads
US4913735A (en) * 1989-02-09 1990-04-03 Palmer Manufacturing & Supply, Inc. Flux injector lance for use in processing aluminum and method
US5681526A (en) * 1996-04-23 1997-10-28 Usx Corporation Method and apparatus for post-combustion of gases during the refining of molten metal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521167B1 (fr) * 1982-02-10 1987-04-30 Siderurgie Fse Inst Rech Lance d'injection de gaz pour convertisseur metallurgique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB254603A (en) * 1925-12-12 1926-07-08 Otto August Banner Improvements in or relating to fuel injection nozzles for internal combustion engines
DE685715C (de) * 1937-01-17 1939-12-22 Anton Gellner Farbspritzverfahren
FR962937A (enrdf_load_stackoverflow) * 1947-03-11 1950-06-23
GB667654A (en) * 1949-04-23 1952-03-05 Linde Air Prod Co An improved gas injection nozzle or jet
US2785926A (en) * 1953-11-23 1957-03-19 Lataste Bernard Means for atomizing liquid
US3076642A (en) * 1960-06-21 1963-02-05 Pompey Acieries Injection devices
US3130252A (en) * 1959-02-20 1964-04-21 Arbed Lances for treatment of metal baths

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB254603A (en) * 1925-12-12 1926-07-08 Otto August Banner Improvements in or relating to fuel injection nozzles for internal combustion engines
DE685715C (de) * 1937-01-17 1939-12-22 Anton Gellner Farbspritzverfahren
FR962937A (enrdf_load_stackoverflow) * 1947-03-11 1950-06-23
GB667654A (en) * 1949-04-23 1952-03-05 Linde Air Prod Co An improved gas injection nozzle or jet
US2785926A (en) * 1953-11-23 1957-03-19 Lataste Bernard Means for atomizing liquid
US3130252A (en) * 1959-02-20 1964-04-21 Arbed Lances for treatment of metal baths
US3076642A (en) * 1960-06-21 1963-02-05 Pompey Acieries Injection devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534948A (en) * 1966-08-24 1970-10-20 Exxon Research Engineering Co Lance heads
US4913735A (en) * 1989-02-09 1990-04-03 Palmer Manufacturing & Supply, Inc. Flux injector lance for use in processing aluminum and method
US5681526A (en) * 1996-04-23 1997-10-28 Usx Corporation Method and apparatus for post-combustion of gases during the refining of molten metal

Also Published As

Publication number Publication date
LU39169A1 (enrdf_load_stackoverflow) 1960-11-12
DE1408783A1 (de) 1969-02-06

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