GB1458168A - Method of producing low nitrogen steel - Google Patents
Method of producing low nitrogen steelInfo
- Publication number
- GB1458168A GB1458168A GB3576875A GB3576875A GB1458168A GB 1458168 A GB1458168 A GB 1458168A GB 3576875 A GB3576875 A GB 3576875A GB 3576875 A GB3576875 A GB 3576875A GB 1458168 A GB1458168 A GB 1458168A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rate
- content
- melt
- reduced
- blown
- 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.)
- Expired
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
- C21C5/30—Regulating or controlling the blowing
- C21C5/34—Blowing through the bath
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
1458168 Producing low-nitrogen steel USS ENGS & CONSULTANTS Inc 29 Aug 1975 [30 Aug 1974] 35768/75 Heading C7D In a bottom-blown process for refining molten pig-iron having an initial N content > 0À002%, a stream of free-oxygen-containing gas is introduced into the melt at rate R T in the range 75 to 160 NCF/min/ton where RT = R O + R S , R O being the rate of introduction of O 2 and R S that of the other gases, and RO being # 0À8R T ; thereafter there is introduced at rate # 0À8R T an inert purging gas while the C content of the melt is # 0À3%, until the N content of the melt has been reduced to <80% of the original level, and then oxygen is introduced at rate # 0À8R T until the C content of the melt falls below 0.2%. The process may be used in a Q-BOP type process, wherein O 2 is blown into the bottom of the melt surrounded by a sheath of protective gas, e.g. methane, blown in at rate R p ; in this case RS may be R p + R A where R A is the rate of argon input; this may be substantially zero initially. Then, preferably after the silicon portion of the blow, R O is reduced, preferably to zero while RA is increased to R T ; some O 2 may be present in the Ar, however. When the N 2 content has been suitably reduced, R O is again increased to # 0À8 RT until the C content is reduced as required.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US50191274A | 1974-08-30 | 1974-08-30 | |
| US05/574,804 US4004920A (en) | 1975-05-05 | 1975-05-05 | Method of producing low nitrogen steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1458168A true GB1458168A (en) | 1976-12-08 |
Family
ID=27053962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3576875A Expired GB1458168A (en) | 1974-08-30 | 1975-08-29 | Method of producing low nitrogen steel |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5150214A (en) |
| CA (1) | CA1043571A (en) |
| DE (1) | DE2538159C2 (en) |
| FR (1) | FR2283229A1 (en) |
| GB (1) | GB1458168A (en) |
| IT (1) | IT1041622B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA775918B (en) * | 1977-01-11 | 1978-05-30 | Nat Steel Corp | The use of orgon to prepare low-carbon,low-nitrogen steels in the basic oxygen process |
| FR2560891B1 (en) * | 1984-03-09 | 1989-10-20 | Air Liquide | CAST REFINING PROCESS |
| DE3541850A1 (en) * | 1985-11-27 | 1987-06-04 | Mannesmann Ag | Process for the oxidative treatment of steel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1253581A (en) * | 1968-02-24 | 1971-11-17 | Maximilianshuette Eisenwerk | Improvements in processes and apparatus for making steel |
| DE2007373B2 (en) * | 1970-02-18 | 1973-05-03 | Eisenwerk-Gesellschaft Maximilianshütte mbH, 8458 Sulzbach-Rosenberg | PROCESS AND CONVERTER FOR MANUFACTURING FERRITIC CHROME STEEL |
-
1975
- 1975-08-27 DE DE2538159A patent/DE2538159C2/en not_active Expired
- 1975-08-27 FR FR7526434A patent/FR2283229A1/en active Granted
- 1975-08-28 IT IT69157/75A patent/IT1041622B/en active
- 1975-08-29 JP JP50104176A patent/JPS5150214A/en active Granted
- 1975-08-29 GB GB3576875A patent/GB1458168A/en not_active Expired
- 1975-08-29 CA CA234,487A patent/CA1043571A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1041622B (en) | 1980-01-10 |
| CA1043571A (en) | 1978-12-05 |
| FR2283229A1 (en) | 1976-03-26 |
| DE2538159A1 (en) | 1976-03-11 |
| DE2538159C2 (en) | 1984-08-09 |
| FR2283229B1 (en) | 1979-01-05 |
| JPS5516206B2 (en) | 1980-04-30 |
| JPS5150214A (en) | 1976-05-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |