GB1003161A - Process of continuously converting molten crude iron into steel - Google Patents
Process of continuously converting molten crude iron into steelInfo
- Publication number
- GB1003161A GB1003161A GB2436662A GB2436662A GB1003161A GB 1003161 A GB1003161 A GB 1003161A GB 2436662 A GB2436662 A GB 2436662A GB 2436662 A GB2436662 A GB 2436662A GB 1003161 A GB1003161 A GB 1003161A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- passes
- metal
- iron
- slag
- 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
- C21C5/56—Manufacture of steel by other methods
- C21C5/567—Manufacture of steel by other methods operating in a continuous way
-
- 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
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- 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
<PICT:1003161/C6-C7/1> A continuous process for the conversion of crude iron into steel using a gaseous refining agent containing oxygen in free or combined form is carried out in a series of separate reaction zones including at least one prerefining zone and one decarburizing zone in which different temperatures are maintained, and is characterized in that the crude iron is atomized by means of the refining agent on entering at least one of the reaction zones. The heating of the zones is independent of the refining process. When only carbon, manganese and silicon are present in the crude iron, one prerefining zone for removal of manganese and silicon will be adequate, but if phosphorus is present it is eliminated by treatment with lime in a second prerefining zone. In these zones the gaseous refining agent may have a low ooygen content, such as air, or a mixture of oxygen with carbon dioxide or steam. A gas rich in oxygen is used in the decarburizing zone. In the embodiment illustrated in Fig. 1 iron from blast furnace 1 is separated from slag at separator 2 and passes to desulphurizing unit 3 and mixer 4 before entering the first prerefining vessel 5 at 1250 DEG C. Here the iron entering in a vertical jet is atomized by the gaseous refining agent which may also contain iron ore from nozzle 10, and in this stage about 70% of the manganese and silicon are oxidized. Slag and metal leave the vessel 5 together, being separated outside the vessel, and the metal passes to vessel 14, also at 1250 DEG C. where it is again atomized by gas from nozzle 15. In this stage the gas contains iron ore and lime. After leaving this vessel the metal is separated from slag and passes to furnace 21 where it is heated to 1650 DEG C. by electric or combustion means, and then passes to decarburizing vessel 22 where it is atomized by the gaseous refining agent from nozzle 24. Alternatively by using a strongly oxidizing heating flame heating and decarburizing may proceed simultaneously in vessel 22. In this stage the refining agent may be a mixture of oxygen, steam, carbon dioxide, air and ferric oxide suitably adjusted to prevent oxidation of iron. The metal, after slag separation, passes to deoxidizing vessel 32 and is again atomized by a stream of non-oxidizing gas such as carbon monoxide containing powdered deoxidants such as magnesium or aluminium from nozzles 30, 31. Alternatively a deoxidizing slag may be used, the slag forming additions being made with the atomizing gas. The steel finally passes to vessels 41 where the necessary alloying additions are made. The various vessels are normally arranged so that metal passes through them in cascade, but where this is not possible metal may be raised by means of a CO2 gas lift system as at 29. Scrap metal for addition to the system is melted in shaft furnace 42 using carbon monoxide evolved in the refining process.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT491161A AT226754B (en) | 1961-06-26 | 1961-06-26 | Process and plant for the continuous conversion of molten pig iron into steel by refining with a gaseous refining agent |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1003161A true GB1003161A (en) | 1965-09-02 |
Family
ID=3569791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2436662A Expired GB1003161A (en) | 1961-06-26 | 1962-06-25 | Process of continuously converting molten crude iron into steel |
Country Status (6)
Country | Link |
---|---|
US (1) | US3236637A (en) |
AT (1) | AT226754B (en) |
BE (1) | BE619320A (en) |
DE (1) | DE1433658A1 (en) |
GB (1) | GB1003161A (en) |
LU (1) | LU41904A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3650518A (en) * | 1968-02-02 | 1972-03-21 | Koppers Co Inc | Spray steelmaking apparatus and method |
US3839018A (en) * | 1968-06-03 | 1974-10-01 | British Iron Steel Research | Production of low carbon ferroalloys |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2733141A (en) * | 1956-01-31 | Pneumatic process for the refining of basic pig iron | ||
US949474A (en) * | 1906-05-21 | 1910-02-15 | Globe Steel Filtration Process Company | Process of refining iron. |
US2662819A (en) * | 1949-02-28 | 1953-12-15 | Hofges Heinz | Production of transformer and dynamo steels |
US2668759A (en) * | 1952-05-22 | 1954-02-09 | Inland Steel Co | Steelmaking process |
GB785337A (en) * | 1955-02-11 | 1957-10-23 | Rochlingsche Eisen Und Stahlwe | Method of and apparatus for the continuous production of steel |
US2819160A (en) * | 1955-06-02 | 1958-01-07 | British Oxygen Co Ltd | Process for reducing the metalloid content of iron |
-
1961
- 1961-06-26 AT AT491161A patent/AT226754B/en active
-
1962
- 1962-06-18 LU LU41904D patent/LU41904A1/xx unknown
- 1962-06-22 DE DE19621433658 patent/DE1433658A1/en not_active Withdrawn
- 1962-06-25 GB GB2436662A patent/GB1003161A/en not_active Expired
- 1962-06-25 BE BE619320A patent/BE619320A/en unknown
- 1962-06-25 US US20476362 patent/US3236637A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE1433658A1 (en) | 1968-11-28 |
LU41904A1 (en) | 1962-08-18 |
US3236637A (en) | 1966-02-22 |
BE619320A (en) | 1962-10-15 |
AT226754B (en) | 1963-04-10 |
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