FR2406669A1 - Injection lance, esp. for molten metals - where very thin wall on lance outlet increases working life of lance - Google Patents

Injection lance, esp. for molten metals - where very thin wall on lance outlet increases working life of lance

Info

Publication number
FR2406669A1
FR2406669A1 FR7732010A FR7732010A FR2406669A1 FR 2406669 A1 FR2406669 A1 FR 2406669A1 FR 7732010 A FR7732010 A FR 7732010A FR 7732010 A FR7732010 A FR 7732010A FR 2406669 A1 FR2406669 A1 FR 2406669A1
Authority
FR
France
Prior art keywords
lance
esp
working life
nozzle
thin wall
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.)
Granted
Application number
FR7732010A
Other languages
French (fr)
Other versions
FR2406669B3 (en
Inventor
Bernard Bahout
Jacques Cordier
Hugues Zanetta
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to FR7732010A priority Critical patent/FR2406669A1/en
Publication of FR2406669A1 publication Critical patent/FR2406669A1/en
Application granted granted Critical
Publication of FR2406669B3 publication Critical patent/FR2406669B3/fr
Granted legal-status Critical Current

Links

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
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

The lance consists of a pipe coated externally, at least on the portion which is immersed, with a refractory; and the ring shaped outlet end of the lance or its outlet nozzle has a wall thickness (t) which is substantially less than that used in conventional lances. Th end of the lance or its nozzle pref. has a conical portion on its outer wall with a cone angle at least equal to the cone angle inside the end of the lance or nozzle so the thickness (t) reduces towards the outlet; dimension (t), in direct contact with the molten metal, is pref. max. 5mm and is esp. ca. 3mm. The lance carries a gas which possibly contains powders; and the thin end (t) reduces heat flow to the lance end, thereby increasing the working life of the lancE.
FR7732010A 1977-10-21 1977-10-21 Injection lance, esp. for molten metals - where very thin wall on lance outlet increases working life of lance Granted FR2406669A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7732010A FR2406669A1 (en) 1977-10-21 1977-10-21 Injection lance, esp. for molten metals - where very thin wall on lance outlet increases working life of lance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7732010A FR2406669A1 (en) 1977-10-21 1977-10-21 Injection lance, esp. for molten metals - where very thin wall on lance outlet increases working life of lance

Publications (2)

Publication Number Publication Date
FR2406669A1 true FR2406669A1 (en) 1979-05-18
FR2406669B3 FR2406669B3 (en) 1980-08-08

Family

ID=9196890

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7732010A Granted FR2406669A1 (en) 1977-10-21 1977-10-21 Injection lance, esp. for molten metals - where very thin wall on lance outlet increases working life of lance

Country Status (1)

Country Link
FR (1) FR2406669A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2500341A1 (en) * 1980-11-28 1982-08-27 Sib Metall Instit Tuyere for addn. of powder materials into molten metal - has feed-pipe whose terminal part has opening connected to gas deflection channel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2500341A1 (en) * 1980-11-28 1982-08-27 Sib Metall Instit Tuyere for addn. of powder materials into molten metal - has feed-pipe whose terminal part has opening connected to gas deflection channel

Also Published As

Publication number Publication date
FR2406669B3 (en) 1980-08-08

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