GB631235A - Improvements in or relating to the manufacture of steel - Google Patents
Improvements in or relating to the manufacture of steelInfo
- Publication number
- GB631235A GB631235A GB29604/39A GB2960439A GB631235A GB 631235 A GB631235 A GB 631235A GB 29604/39 A GB29604/39 A GB 29604/39A GB 2960439 A GB2960439 A GB 2960439A GB 631235 A GB631235 A GB 631235A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- lime
- cao
- silica
- steel
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
In a process for the production of steels and alloy steels having a low sulphur content (0.015 per cent or less), the first slag is removed silicon is added to the metal in sufficient quantity so that, after reaction, the required amount remains in the steel, and the steel which may contain a small proportion of iron oxide is intermixed with a basic slag composed of lime, alumina, and silica to produce a final slag having less than 1 per cent of iron oxide and falling within the area on the lime-silica-alumina diagram defined by the points CaO = 60% - Si O2 = 40% : CaO = 41% - Si O2 = 22% - Al2 O3 = 37% : CaO = 45% - Al2 O3 = 55% and the point CaO = 100%, the steel having a final silicon content higher than 0.05 per cent and generally 0.2 to 0.4 per cent. The silicon added, which may amount to 1 per cent of the bath weight may be replaced in part by Al, Cu, or Mg, and lime and silica in the basic slag partly replaced by magnesia, baryta, strontia or soda and by alumina, titanium oxide or zirconium oxide respectively. The basic slag may contain up to 5 per cent of iron and/or manganese oxide and when the silica content is more than 20 per cent the lime should have less than 0.1 per cent of sulphur. Specification 533,671 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR631235X | 1938-11-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB631235A true GB631235A (en) | 1949-10-31 |
Family
ID=8991623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29604/39A Expired GB631235A (en) | 1938-11-17 | 1939-11-07 | Improvements in or relating to the manufacture of steel |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB631235A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2706152A (en) * | 1952-07-08 | 1955-04-12 | Carnegie Inst | Method of sulphur removing from pig iron |
-
1939
- 1939-11-07 GB GB29604/39A patent/GB631235A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2706152A (en) * | 1952-07-08 | 1955-04-12 | Carnegie Inst | Method of sulphur removing from pig iron |
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