GB883958A - Improvements in or relating to the refining of crude iron - Google Patents
Improvements in or relating to the refining of crude ironInfo
- Publication number
- GB883958A GB883958A GB40606/58A GB4060658A GB883958A GB 883958 A GB883958 A GB 883958A GB 40606/58 A GB40606/58 A GB 40606/58A GB 4060658 A GB4060658 A GB 4060658A GB 883958 A GB883958 A GB 883958A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slag
- blast
- blowing
- carbon content
- during
- 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
- C21C5/32—Blowing from above
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)
Abstract
A three stage surface blowing pig iron refining process comprises blowing oxygen with low blast energy on to a charge in the presence of end slag from the previous batch till the carbon content reaches 3,5-2,5%, at least partially deslagging, adding slag forming materials and continuing blowing with low blast energy until the carbon content reaches 2-1%, completely deslagging, and forming a fresh slag and blowing with increased blast energy until the desired carbon content is reached. During the first two phases the blast pressure may be less than 10 kg/sq. cm. and the blast nozzle located more than 1 met. from the surface, while during the second phase the blast pressure may be 10-15 kg/sq. cm. and the said distance less than 1 met. A slag basicity of more than 50% CaO is maintained during the first two phases. In a modification an amount of mill scale and/or iron ore is added at the end of the second phase in sufficient quantity to bring the FeO content of the slag more than 25%. The slag is then allowed to react vigorously with the bath for a short while prior to its complete removal, and the third stage then carried out.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT883958X | 1957-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB883958A true GB883958A (en) | 1961-12-06 |
Family
ID=3682709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB40606/58A Expired GB883958A (en) | 1957-12-23 | 1958-12-16 | Improvements in or relating to the refining of crude iron |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB883958A (en) |
| MY (1) | MY6500092A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649246A (en) * | 1969-08-29 | 1972-03-14 | Allegheny Ludlum Steel | Decarburizing molten steel |
-
1958
- 1958-12-16 GB GB40606/58A patent/GB883958A/en not_active Expired
-
1965
- 1965-12-31 MY MY196592A patent/MY6500092A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649246A (en) * | 1969-08-29 | 1972-03-14 | Allegheny Ludlum Steel | Decarburizing molten steel |
Also Published As
| Publication number | Publication date |
|---|---|
| MY6500092A (en) | 1965-12-31 |
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