JPS5726115A - Method for preventing clogging of nozzle for charging additive to molten iron - Google Patents
Method for preventing clogging of nozzle for charging additive to molten ironInfo
- Publication number
- JPS5726115A JPS5726115A JP10090380A JP10090380A JPS5726115A JP S5726115 A JPS5726115 A JP S5726115A JP 10090380 A JP10090380 A JP 10090380A JP 10090380 A JP10090380 A JP 10090380A JP S5726115 A JPS5726115 A JP S5726115A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten steel
- vessel
- steel
- resuming
- 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.)
- Pending
Links
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
PURPOSE: To make the resuming of additive charging possible by blowing gaseous oxygen at the time when a nozzle for additives provided to a degassing treatment vessel or the like for molten steel is closed by solidified steel while not in use, thereby melting the solidified steel and opening the nozzle hole.
CONSTITUTION: Reflux pipes 2, 2' of a degassing vessel 1 are immersed into the molten steel 4 in a vessel 3, and the molten steel is circulated into the vessel 1, whereby it is degassed. At this time, additives such as desulfurizers, heat raising agents and the like are added from a nozzle 5 into the molten steel 4 by an inert gas to be supplied by opening a valve 7. After the end of the addition, the inert gas is kept blown through the nozzle 5 in order to prevent the molten steel 4 from backflowing into the nozzle 5. The molten steel near the nozzle 5 is cooled by the inert gas and solidifies to close the nozzle 5, thereby making the resuming of charging of the additives infeasible. At this time, the valve 7' is opened to feed oxygen and melt the solidified steel, thereby making the resuming of the additive charging through the nozzle 5 feasible.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10090380A JPS5726115A (en) | 1980-07-23 | 1980-07-23 | Method for preventing clogging of nozzle for charging additive to molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10090380A JPS5726115A (en) | 1980-07-23 | 1980-07-23 | Method for preventing clogging of nozzle for charging additive to molten iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5726115A true JPS5726115A (en) | 1982-02-12 |
Family
ID=14286298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10090380A Pending JPS5726115A (en) | 1980-07-23 | 1980-07-23 | Method for preventing clogging of nozzle for charging additive to molten iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5726115A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61130413A (en) * | 1984-11-30 | 1986-06-18 | Nippon Steel Corp | Degassing and desulfurizing method of molten iron |
| JPS61152291A (en) * | 1984-12-27 | 1986-07-10 | Ajinomoto Co Inc | Production of d-n-carbamyl-alpha-aminoacid |
| JPH0397807A (en) * | 1989-09-11 | 1991-04-23 | Kawasaki Steel Corp | Method for preventing clogging of lance nozzle in vacuum degassing vessel |
-
1980
- 1980-07-23 JP JP10090380A patent/JPS5726115A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61130413A (en) * | 1984-11-30 | 1986-06-18 | Nippon Steel Corp | Degassing and desulfurizing method of molten iron |
| JPS61152291A (en) * | 1984-12-27 | 1986-07-10 | Ajinomoto Co Inc | Production of d-n-carbamyl-alpha-aminoacid |
| JPH0455674B2 (en) * | 1984-12-27 | 1992-09-04 | Ajinomoto Kk | |
| JPH0397807A (en) * | 1989-09-11 | 1991-04-23 | Kawasaki Steel Corp | Method for preventing clogging of lance nozzle in vacuum degassing vessel |
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