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 lanceInfo
- 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
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.
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)
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 |
-
1977
- 1977-10-21 FR FR7732010A patent/FR2406669A1/en active Granted
Cited By (1)
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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