GB1259275A - - Google Patents
Info
- Publication number
- GB1259275A GB1259275A GB540968A GB1259275DA GB1259275A GB 1259275 A GB1259275 A GB 1259275A GB 540968 A GB540968 A GB 540968A GB 1259275D A GB1259275D A GB 1259275DA GB 1259275 A GB1259275 A GB 1259275A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxide
- carbon
- steel
- fume
- iron
- 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
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
- C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
-
- 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
-
- 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
- Y02P10/20—Recycling
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)
- Manufacture And Refinement Of Metals (AREA)
Abstract
1,259,275. Refining steel. STEEL CASTINGS RESEARCH & TRADE ASSOCIATION. Jan. 23, 1969 [Feb. 2, 1968], No.5409/68. Heading C7D. There is introduced into a ferrous melt, using carrier gas containing free or bound oxygen but not more than 45% of oxygen by volume, the oxide of metal desired in the product, at a rate and quantity such that a rapid carbon boil is produced but that the production of brown fume is substantially inhibited. The process may be applied to carbon steel, when iron oxide, possibly in the form of millscale, ore or dust from a fume-cleaning plant, is introduced, or may be applied to alloy steels when one or more oxides of iron, nickel, chromium, molybdenum, copper, cobalt or tungsten may be added; in either case a part of the iron oxide may be introduced into the slag bath. Oxide injection may be stopped when the desired carbon content is reached, or may be continued until other impurities have been eliminated followed by recrystallization. A preferred gas is compressed air, but carbon dioxide may also be used.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB540968 | 1968-02-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1259275A true GB1259275A (en) | 1972-01-05 |
Family
ID=9795642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB540968A Expired GB1259275A (en) | 1968-02-02 | 1968-02-02 |
Country Status (8)
Country | Link |
---|---|
BE (1) | BE727735A (en) |
CH (1) | CH519024A (en) |
DE (1) | DE1904914A1 (en) |
ES (1) | ES363201A1 (en) |
FR (1) | FR2001274A1 (en) |
GB (1) | GB1259275A (en) |
HK (1) | HK56477A (en) |
NO (1) | NO128331B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4212665A (en) * | 1978-07-27 | 1980-07-15 | Special Metals Corporation | Decarburization of metallic alloys |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR564035A (en) * | 1922-03-17 | 1923-12-19 | Refining process for low carbon ferrous alloys | |
FR565353A (en) * | 1922-04-25 | 1924-01-25 | Improvements in the extraction and refining of metals and alloys |
-
1968
- 1968-02-02 GB GB540968A patent/GB1259275A/en not_active Expired
-
1969
- 1969-01-30 FR FR6902474A patent/FR2001274A1/en active Granted
- 1969-01-31 BE BE727735D patent/BE727735A/xx unknown
- 1969-01-31 CH CH157169A patent/CH519024A/en not_active IP Right Cessation
- 1969-01-31 DE DE19691904914 patent/DE1904914A1/en active Pending
- 1969-01-31 NO NO00371/69A patent/NO128331B/no unknown
- 1969-02-01 ES ES363201A patent/ES363201A1/en not_active Expired
-
1977
- 1977-11-10 HK HK564/77A patent/HK56477A/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE1904914A1 (en) | 1972-02-17 |
NO128331B (en) | 1973-10-29 |
FR2001274A1 (en) | 1969-09-26 |
BE727735A (en) | 1969-07-01 |
CH519024A (en) | 1972-02-15 |
FR2001274B1 (en) | 1974-05-03 |
HK56477A (en) | 1977-11-18 |
ES363201A1 (en) | 1970-12-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |