GB785325A - Improvements in or relating to the manufacture of chromium-free steel - Google Patents
Improvements in or relating to the manufacture of chromium-free steelInfo
- Publication number
- GB785325A GB785325A GB6199/55A GB619955A GB785325A GB 785325 A GB785325 A GB 785325A GB 6199/55 A GB6199/55 A GB 6199/55A GB 619955 A GB619955 A GB 619955A GB 785325 A GB785325 A GB 785325A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- pig
- per cent
- iron
- free 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
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
- C21C1/00—Refining of pig-iron; Cast iron
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
A method of manufacturing chromium free steel from iron ores containing chromium comprises smelting the chromium containing iron ores with other iron ores in a blast furnace to produce a pig iron containing over 0.2 per cent Cr and below 0.8 per cent Mn, refining the pig by oxidation in the presence of heat absorbing oxides to decrease the chromium to below 0.1 per cent and converting the low chromium pig into chromium-free steel. The oxidation may be carried out in a ladle by blowing with air, oxygen enriched air, or oxygen, the addition of a heat absorbing oxide, e.g. mill scale, or other solid, liquid, or gaseous oxides suspended in the blowing medium, and maintaining the temperature below 1350 DEG C. so that the carbon content is not reduced to an appreciable extent. The low chromium pig iron may then be blown in a Bessemer converter to produce a chromium-free, low nitrogen steel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE785325X | 1954-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB785325A true GB785325A (en) | 1957-10-23 |
Family
ID=6698734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6199/55A Expired GB785325A (en) | 1954-04-03 | 1955-03-02 | Improvements in or relating to the manufacture of chromium-free steel |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB785325A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997021843A1 (en) * | 1995-12-11 | 1997-06-19 | 'holderbank' Financiere Glarus Ag | Process for processing waste or fractions thereof, especially light car shredder fractions |
-
1955
- 1955-03-02 GB GB6199/55A patent/GB785325A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997021843A1 (en) * | 1995-12-11 | 1997-06-19 | 'holderbank' Financiere Glarus Ag | Process for processing waste or fractions thereof, especially light car shredder fractions |
| US6068677A (en) * | 1995-12-11 | 2000-05-30 | "Holderbank" Financiere Glarus Ag | Method for processing waste or waste fractions, in particular car shredder light fractions |
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