FR2397461A1 - Lance for injecting powders into molten metal, esp. steel - uses two concentric tubes, the inner tube carrying powder and gas - Google Patents

Lance for injecting powders into molten metal, esp. steel - uses two concentric tubes, the inner tube carrying powder and gas

Info

Publication number
FR2397461A1
FR2397461A1 FR7721851A FR7721851A FR2397461A1 FR 2397461 A1 FR2397461 A1 FR 2397461A1 FR 7721851 A FR7721851 A FR 7721851A FR 7721851 A FR7721851 A FR 7721851A FR 2397461 A1 FR2397461 A1 FR 2397461A1
Authority
FR
France
Prior art keywords
lance
inner tube
gas
molten metal
outlet hole
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
FR7721851A
Other languages
French (fr)
Other versions
FR2397461B3 (en
Inventor
Hugues Zanetta
Bernard Bahout
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 FR7721851A priority Critical patent/FR2397461A1/en
Publication of FR2397461A1 publication Critical patent/FR2397461A1/en
Application granted granted Critical
Publication of FR2397461B3 publication Critical patent/FR2397461B3/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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents

Landscapes

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

Abstract

The powder is carried by a gas stream flowing along the axis of the lance, which has a single outlet hole dipping below the surface of the melt. The gas stream (I) carrying the powder is surrounded by a concentric stream (II) of gas which converges onto (I) at the lance outlet hole. The pref. lance consists of two concentric tubes (a1,b1), the outer tube (b1) possessing a truncated cone end forming the outlet hole and carrying stream (II). The inner tube forms an annular channel for (II) and carries stream (I). The inner tube pref. ends before the outlet hole formed by the outer tube, and the inner tube can pref. be adjusted axially in the outer tube. Blockage of the lance by molten metal is avoided.
FR7721851A 1977-07-13 1977-07-13 Lance for injecting powders into molten metal, esp. steel - uses two concentric tubes, the inner tube carrying powder and gas Granted FR2397461A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7721851A FR2397461A1 (en) 1977-07-13 1977-07-13 Lance for injecting powders into molten metal, esp. steel - uses two concentric tubes, the inner tube carrying powder and gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7721851A FR2397461A1 (en) 1977-07-13 1977-07-13 Lance for injecting powders into molten metal, esp. steel - uses two concentric tubes, the inner tube carrying powder and gas

Publications (2)

Publication Number Publication Date
FR2397461A1 true FR2397461A1 (en) 1979-02-09
FR2397461B3 FR2397461B3 (en) 1980-04-18

Family

ID=9193418

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7721851A Granted FR2397461A1 (en) 1977-07-13 1977-07-13 Lance for injecting powders into molten metal, esp. steel - uses two concentric tubes, the inner tube carrying powder and gas

Country Status (1)

Country Link
FR (1) FR2397461A1 (en)

Also Published As

Publication number Publication date
FR2397461B3 (en) 1980-04-18

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