FR2260621A1 - Bottom-blown basic oxygen steel mfr. - oxygen followed by argon or nitrogen to reduce hydrogen content - Google Patents
Bottom-blown basic oxygen steel mfr. - oxygen followed by argon or nitrogen to reduce hydrogen contentInfo
- Publication number
- FR2260621A1 FR2260621A1 FR7504250A FR7504250A FR2260621A1 FR 2260621 A1 FR2260621 A1 FR 2260621A1 FR 7504250 A FR7504250 A FR 7504250A FR 7504250 A FR7504250 A FR 7504250A FR 2260621 A1 FR2260621 A1 FR 2260621A1
- Authority
- FR
- France
- Prior art keywords
- steel
- content
- oxygen
- hydrogen
- low
- 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.)
- Withdrawn
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
This process is for mfg. steel with a pre-determined low H2 content in a bottom-blown basic oxygen converter by (a) blowing O2 surrounded by a protective hydrocarbon gas through one or more jets below the surface of the melt to lower the carbon content; (b) then blowing a hydrogen-free gas through the jets so the final H2 content Hf (ppm) is where H1 is the initial H2 content; V = vol. of the hydrogen free gas (s.c.f.); W = bath wt. (lbs); and K1 is the ratio of the mol. wt. of H2 x 106 to the product from 1 mole. gas under standard calibration conditions. The final steel pref. contains more than 0.1% C and one pref. method is to blow Ar through the melt for 2 secs. to 3 mins. to reduce the hydrogen, oxygen and nitrogen contents of the steel; other pref. methods are claimed. Mfr. of steel with low hydrogen content and/or low O2 and/or low N2, esp. carbon steel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44160874A | 1974-02-11 | 1974-02-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2260621A1 true FR2260621A1 (en) | 1975-09-05 |
Family
ID=23753559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7504250A Withdrawn FR2260621A1 (en) | 1974-02-11 | 1975-02-11 | Bottom-blown basic oxygen steel mfr. - oxygen followed by argon or nitrogen to reduce hydrogen content |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS589122B2 (en) |
| BE (1) | BE825352A (en) |
| DE (1) | DE2505595A1 (en) |
| FR (1) | FR2260621A1 (en) |
| IT (1) | IT1030119B (en) |
| SE (1) | SE7501446L (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5833289B2 (en) * | 1978-08-23 | 1983-07-19 | 川崎製鉄株式会社 | Method for producing industrial pure iron using a bottom blowing converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3891429A (en) * | 1973-06-07 | 1975-06-24 | Koppers Co Inc | Method for selective decarburization of alloy steels |
-
1975
- 1975-02-10 SE SE7501446A patent/SE7501446L/xx unknown
- 1975-02-10 BE BE153202A patent/BE825352A/en unknown
- 1975-02-11 IT IT67357/75A patent/IT1030119B/en active
- 1975-02-11 DE DE19752505595 patent/DE2505595A1/en active Pending
- 1975-02-11 FR FR7504250A patent/FR2260621A1/en not_active Withdrawn
- 1975-02-12 JP JP50016957A patent/JPS589122B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE7501446L (en) | 1975-08-12 |
| JPS514013A (en) | 1976-01-13 |
| BE825352A (en) | 1975-08-11 |
| DE2505595A1 (en) | 1975-08-14 |
| IT1030119B (en) | 1979-03-30 |
| JPS589122B2 (en) | 1983-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |