JPS5672115A - Preventing method of wear of top-blowing oxygen lance - Google Patents
Preventing method of wear of top-blowing oxygen lanceInfo
- Publication number
- JPS5672115A JPS5672115A JP14878879A JP14878879A JPS5672115A JP S5672115 A JPS5672115 A JP S5672115A JP 14878879 A JP14878879 A JP 14878879A JP 14878879 A JP14878879 A JP 14878879A JP S5672115 A JPS5672115 A JP S5672115A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- lance
- blowing
- completed
- flow rate
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
PURPOSE: To prevent wear of a lance, by flowing a specified flow rate of N2 or Ar gas from the midway where O2 gas pressure is reduced into the lance when O2 blowing is completed, so that the oxygen lance may be cooled until it is removed from a high temperature decarbonizing atmosphere.
CONSTITUTION: Ar gas supplying pipe 15 and N2 gas supplying pipe 16 are connected to calorizing lance 14 used as a top-blowing oxygen lance. When the O2 blowing is completed, Ar gas or N2 gas is blown from lance 14 through pipe 15 or 16 at the midway where O2 gas pressure is reduced. In this case, the flow rate of O2 gas is reduced gradually until it becomes zero and only Ar or N2 gas is blown from lance 14 finally. Blowing of this Ar gas or N2 gas for purging is continued until the vacuum decarbonizing is completed and vacuum cover removing works are commenced due to leaking. The most effective flow rate of this Ar gas or N2 gas is ≥60Nl/min per cm2 of cross section of lance 14.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14878879A JPS5953323B2 (en) | 1979-11-19 | 1979-11-19 | How to prevent wear and tear on top-blown oxygen lances |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14878879A JPS5953323B2 (en) | 1979-11-19 | 1979-11-19 | How to prevent wear and tear on top-blown oxygen lances |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5672115A true JPS5672115A (en) | 1981-06-16 |
JPS5953323B2 JPS5953323B2 (en) | 1984-12-24 |
Family
ID=15460692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14878879A Expired JPS5953323B2 (en) | 1979-11-19 | 1979-11-19 | How to prevent wear and tear on top-blown oxygen lances |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5953323B2 (en) |
-
1979
- 1979-11-19 JP JP14878879A patent/JPS5953323B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5953323B2 (en) | 1984-12-24 |
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