GB1488783A - Refinement of ferrous alloys - Google Patents
Refinement of ferrous alloysInfo
- Publication number
- GB1488783A GB1488783A GB565576A GB565576A GB1488783A GB 1488783 A GB1488783 A GB 1488783A GB 565576 A GB565576 A GB 565576A GB 565576 A GB565576 A GB 565576A GB 1488783 A GB1488783 A GB 1488783A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- melt
- converter
- jet
- 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
- 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
- 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
-
- 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
- C21C5/32—Blowing from above
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)
Abstract
1488783 Refining ferrous alloys ELECTROHEAT (PROPRIETARY) Ltd 12 Feb 1976 [05655/76] Heading C7D In a process for the removal of carbon from iron, alloy steels and ferro-alloys, especially those containing chromium and vanadium, to levels of the order of 0À05% or less, the molten super-heated metal is placed in an L.D. oxygen converter and the metal bath top blown with oxygen in the normal manner to partially remove the C from the melt using a twin-channelled converter lance, i.e. down to about 0À4%C with a Si content of about 0À1%. The melt is slagged off if necessary and hydrogen passed through one channel of the lance so that it ignites in the oxygen stream passing through the other channel to form an oxy-hydrogen flame jet, which impinges on the metal bath to the same depth as the initial oxygen jet. Up to 30% excess oxygen may be in the water vapour jet, which also may include nitrogen if required, and the melt is blown until the desired carbon content is reached. The initial oxygen blow lasts 9-10 minutes, and the water vapour blow lasts less than 15 minutes. Where the converter refractories are basic, the final blown metal may be vacuum degassed or purged with argon prior to casting, but this step is not necessary where acid refractories are used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB565576A GB1488783A (en) | 1976-02-12 | 1976-02-12 | Refinement of ferrous alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB565576A GB1488783A (en) | 1976-02-12 | 1976-02-12 | Refinement of ferrous alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1488783A true GB1488783A (en) | 1977-10-12 |
Family
ID=9800150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB565576A Expired GB1488783A (en) | 1976-02-12 | 1976-02-12 | Refinement of ferrous alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1488783A (en) |
-
1976
- 1976-02-12 GB GB565576A patent/GB1488783A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |